Abstract:Due to its special flocculent and reticular structure, the polymer has viscosity-increasing, reduces the loss of liquid in the foam, delays the thinning of the liquid film, and reduces the solubility of the gas in the liquid film. In the process of oil and gas field development, although the bubble stabilizing effect of foam stabilizer has been recognized early, few comparative studies have been conducted on its temperature resistance. However, the influence of temperature conditions on the stabilizer is different in practical applications. With the change from shallow reservoir to high temperature reservoir, fracture type and low permeability reservoir. It is often faced with the characteristics of poor stability of conventional foam fluid and insufficient resistance to high temperature. Higher requirements have been put forward for the properties of foam stabilizers, especially for their temperature resistance. Therefore, the improvement of its temperature resistance has always been a difficulty in research. In this paper, the temperature resistance of foam stabilizer is analyzed according to the three main fields of foam stabilizer: foam fracturing fluid, foam flooding fluid and foam well washing fluid, and some suggestions for future research of polymer-enhanced foam are put forward.

Abstract:China's external dependence on crude oil continues to rise, while the recovery rate continues to decline. Most of the remaining reservoirs found recently are harsh reservoirs with high temperature, high salinity and low permeability as well as high viscosity. Conventional surfactants such as petroleum sulfonate and alkylbenzene sulfonate can't meet the requirements for chemical enhanced oil recovery (EOR) due to their low activity and poor salt tolerance. The recent progress of novel surfactants, such as anionic-nonionic surfactants, dimeric (Gemini) and oligomeric surfactants, betaine type amphoteric surfactants, polymeric surfactants, Alkyl glycoside surfactants, viscoelastic surfactants, biosurfactants, mixtures of anionic/cationic surfactants are introduced. Furthermore, the differences of evaluation methods of surfactants for EOR between China and western countries are discussed. Finally, the development direction of surfactants for EOR is prospected.

Abstract:Cationic polymers, a kind of polyelectrolyte, are widely used in petroleum exploitation, papermaking, textile, wastewater and sludge treatment, etc. because of the properties of good water-solubility, regluting iondegree and molecular weight, effective and nontoxic. Methacryloyloxyethyltrimethyl ammonium chloride polymer is one of the representatives. The research progress in the polymerization and application of poly-methacryloyloxyethyltrimethyl ammonium chloride PDMC and poly-methacryloyloxyethyltrimethyl ammonium chloride-co-acrylamide P(DMC-AM) are reviewed in this paper. Firstly, PDMC synthesis progress is summarized and the latest research direction is picked up. Then, the research progresses on aqueous polymerization, inverse emulsion polymerization and dispersion polymerization are summarized and discussed, according to the classification of polymerization. Furthermore, the differences of P(DMC-AM) in practical sludge dewatering applications are compared. Finally, the existed difficulties on the synthesis and application are concluded and its future development tendency are predicted.

Abstract:A kind of hydrolysis resistant porous hydrogel was prepared using sodium alginate (SA) as raw material, acrylic acid (AA)、2-acrylamido-2-methylpropane sulfonic acid (AMPS) as the monomers, tetraallylammonium bromide (TAAB) as crosslinker, EDTA as modifying agent. The water absorbency and adsorption performance of Cu2 、Cr3 were determined and the gel adsorption isotherm and adsorption kinetics were studied. The surface morphology of hydrogels were analyzed by FTIR、SEM、AFM. According to the results, the swelling rate of hydrogel could be significantly improved with the addition of SA, and the modified hydrogel had excellent hydrolysis resistance. The water absorption ratio in distilled water at 125℃ could reach 350.4 g/g.Adding the modifier EDTA disodium and increasing the pH value of the solution were conducive to improving the adsorption performance of the hydrogel on Cu2 and Cr3 , with the maximum adsorption capacity of 539.2 and 286.7 mg/g respectively.The adsorption mechanism of the hydrogel on Cu2 was in line with the Langmuir adsorption isotherm, while the adsorption of Cr3 was in line with the Freundlich model. The adsorption process was spontaneous exothermic. When the adsorption temperature increased, the adsorption equilibrium time decreased, and the adsorption capacity decreased slightly.

Abstract:Abstract: To reduce costs and improve environmental performance, water-based carrier was used to replace organic carrier. The copper powders mixed with particle diameters of 5 μm and 15 μm were used as main conductive phase, and a small amount of graphene is added as conductive reinforcement phase. The water-based graphene-copper composite conductive paste was prepared according to a certain mass ratio. The effects of water-based carrier on paste performance were studied by four-probe tester and scanning electron microscope (SEM), and the conductive connection model was established by analysing for electric conduction mechanism. The results show that: when the mass ratio of deionized water: cmc: peg: defoamer is 96.9:1.5:1.5:0.1, the water-based carrier has better performance. When the water-based carrier content is 30%, the prepared water-based graphene-copper composite conductive paste has excellent printing performance and a small electrical resistivity of 1.65 mΩ?cm. The resistivity of water-based composite paste with graphene is 95.1% lower than that of copper paste and 75.78% lower than that of graphene-copper composite paste prepared by organic carrier. The conductive film is flatter and denser, and the contact between conductive phases is closer. A large number of graphene overlaps or fills the gap between copper powders laterally or radially, forming conductive channels in parallel or in series with copper powders. A dense conductive network is formed and the conductivity of the composite pastes can be improved.

Abstract:Fe-based metal organic frameworks (MOF-Fe) treated by chloroauric acid were used as template to prepare MOFs-Fe porous carbon/Au nanopowders (MFPC/Au-NPs) by one-step pyrolysis method. The morphology and phase purity of the sample were characterized by scanning electron microscopy (SEM) and X-ray powder diffraction (XRD). The elements, specific surface area and pore size distribution of the composites were determined by X-ray photoelectron spectroscopy (XPS) and automatic specific surface and aperture analyzer. A modified electrode (MFPC/Au-NPs/GCE) was prepared by drop-coating method. The electrochemical behavior of catechol (CA) and hydroquinone (HQ) on this electrode were investigated by cyclic voltammetry (CV), differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS). At pH=7.4, the oxidation peak currents of HQ and CA on the modified electrode showed a linear relationship with their concentration in the range of 0.4~20 μmol/L. The corresponding detection limits were 0.039 and 0.040 μmol/L. This sensor exhibits low detection limit and high sensitivity, and provides a simple and rapid method for the detection of CA and HQ.relationship at a concentration of 0.4~20 μmol/L, and the detection limits are 0.039 μmol/ L and 0.040 μmol/L. This sensor has low detection limit and high sensitivity, and provides a simple and rapid method for rapid detection of catechol and hydroquinone.

Abstract:Copper oxide and 3,3 ', 5,5'-biphenyltetracarboxylic acid are used as raw materials to obtain a MOF efficiently. At room temperature, we used water, ethanol and N, N-dimethylformamide (DMF) as liquid or vapors, respectively. The metal-organic framework-505 (MOF-505) was prepared by pre-ion and -liquid assisted grinding, then the Vapor-assisted aging (VAG) was carried out in different solvent vapor (water, methanol, DMF) to obtain the VAG-MOF-505. The results showed that VAG-MOF-505 with high crystallinity was obtained through pre-ion and -liquid assisted grinding with adding ethanol liquid (100 μL), then aged in ethanol vapor for 20 h at room temperature. By means of PXRD, FTIR, TGA, SEM, BET, structural characterization and pore analyses of the obtained product were performed. Its SEM and PXRD results showed that VAG-MOF-505 had high crystallinity similar to that made from the solvothermal method. Moreover, VAG-MOF-505 has a BET specific surface area of 1281 m2/g and an average pore diameter of 0.66 nm. This research result provides a new potential application of VAG method in green large-scale synthesis of MOFs.

Abstract:Abstract:With hexadecyl trimethyl ammonium bromide (CTAB) as template agent, triethanolamine (TEA) as a catalyst, ethyl orthosilicate (TEOS) as silica source, calcium nitrate tetrahydrate (CaNT) as the calcium source, triethyl phosphate (TEP) as a source of phosphorus, dendritic mesoporous bioglass RMBG1, RMBG2, RMBG3 were prepared by using the sol-gel method at different temperatures (40 ℃, 60 ℃, 80 ℃). Then, the template agent was removed by calcining at high temperature. The morphology, structure, particle size and stability of dendritic biological glass at different reaction temperatures were characterized by field emission scanning electron microscope (FESEM), transmission electron microscopy (TEM), automatic fast specific surface area and voidage analyzer (BET), nano particle analyzer. The results show that the prepared dendritic mesoporous biological glass RMBG2 at 60 ℃ possess uniform particle size, good dispersion and large specific surface area. It’s particularly that it displays unique structural advantage of three-dimensional open dendritic channels. The qualitative analysis of X-ray electron spectroscopy shows that RMBG2 contains Si, Ca and P elements. The inductively coupled plasma (ICP) shows that the approximate ratio of three elements of RMBG2 (Si: Ca: P) is 84:14:2. The specific surface area of RMBG2 is as high as 821.161m2g-1, The pore size is 3.184 m3.g-1 can be used as an efficient drug carrier.

Abstract:Mesoporous magnetic composite carbon spheres were prepared by in-situ polymerization using tetraethyl orthosilicate (TEOS) as the silicon precursor under the assistance of surfactant cetyltrimethyl ammonium bromide (CTAB).The effects of ethanol-water ratio (Vethanol:Vwater), CTAB dosage and hydrothermal tem-perature (HT) on morphology, particle size and surface structure of carbon spheres were investigated. TEM, SEM, BET and VSM were used to characterize and analyze of carbon spheres. The results show that the ethanol-water ratio and surfactant significantly affect the morphology and particle size of the carbon spheres. In addition, the hydrothermal temperature can change the pore structure of the carbon spheres. The specific surface area of the mesoporous magnetic composite carbon spheres prepared under optimized conditions of Vethanol:Vwater=3:4, CTAB=0.6g, HT=100℃is 553m2/g, which is 2.7 times higher than that before the introduction of the silicon precursor. Moreover mesoporous pore volume ratio in-creased from 18% to 83%. At the same time, the adsorption properties of the material on erythromycin was investigated, and the saturated adsorption capacity was 255mg/g. The adsorbed material was regen-erated with n-butyl acetate, and the adsorption amount was maintain at over 85% of the initial adsorption amount after five cycles of regeneration.

Abstract:The graphite-like carbon nitride (g-C3N4) was prepared by pyrolyzation at high temperature, and then composited with CQDs by hydrothermal method to obtain the g-C3N4/CQDs photo-catalyst. The as-prepared g-C3N4/CQDs was characterized by SEM, TEM, FT-IR, XRD, UV-Vis/DRS, XPS and N2 adsorption and desorption isotherms. Using Rhodamine B (Rh B) as simulated pollutant, the photo-catalytic activity and stability of g-C3N4/CQDs have been investigated under visible light. The results show that the absorption wavelength of g-C3N4/CQDs shifts to the visible light region. When the content of CQDs in composite is 1.5%, the obtained g-C3N4/CQDs photocatalyst has the best catalytic activity. The photocatalytic degradation rate of Rh B by g-C3N4/CQDs is 54.5%, and the correlation coefficient of chemical reaction kinetics is R2=0.9982. The degradation rate of g-C3N4/CQDs is 1.38 times higher than that (39.5%) of pure g-C3N4. After 4 cycles of use, the catalytic degradation rate remained above 50%. The photocatalytic mechanism of catalyst on Rh B was studied. The results show that h+, ·O2-, H2O2 and ·OH were the main active species in the photocatalytic process. The order of oxidation of the four species from strong to weak was: h+ > ·O2- > H2O2 > ·OH.

Abstract:A waterborne self-emulsification epoxy curing agent modified by the short fluorocarbon chain was synthesized successfully based on epoxy resin(E-44), isophorone diisocyanate (IPDI), 1, 1, 3, 3,3- hexafluoro-2-propanol(HFIP),and diethylenetriamine (DETA) as main raw materials, and it was emulsified further with fluorine-containing epoxy resin to form an environment-friendly hydrophobic waterborne epoxy resin. contact angle testing, FTIR, AFM, TGA, DMA and other analytical methods were used to characterize and study the structure of the resin, surface properties, thermal properties and mechanical properties of the cured film results show that the heat resistance and hydrophobicity of the fluorine-containing epoxy were improved to some extent compared with the fluorine-free system, and lower fluorine content 2.4% (the mass fraction of fluorine in epoxy cured substance) can reach the hydrophobic effect. With the fluorine content increases to 5.1%, the hardness of epoxy resin cured flim increased from 3H to the5H, but the adhesion decreases by 1 level, and the glass transition temperature increased from 68℃ to 80℃.The surface roughness is also improved, so that the water contact angle is further increased to an optimum 98°. The cured film obtained the best thermal stability, and the maximum thermal decomposition temperature was 373.1 °C.

Abstract:Two zeolite-topology luminescent metal-organic frameworks LMOF-1 and LMOF-2, constructed with the rich electronic triazine ring ligand and Zn(Ⅱ) were employed as fluorescent probes for the detection of carcinogenic organic pesticides trifluralin and nitrofen. The detection mechanism for trifluralin by LMOF-1 and LMOF-2 was assigned to the charge transfer and the fluorescence resonance energy transfer, confirmed by fluorescent quenching experiments and density functional theory calculations. And the detection mechanism for nitrofen by LMOF-1 and LMOF-2 was mainly assigned to the charge transfer. The limit of detection for trifluralin of LMOF-1 could be down to 5.54 μmol•L-1 with the detection efficiency up to 2.959±0.488 L•μmol-1.

Abstract:A series of polymerizable ionic liquids, dimethylaminoethyl methacrylate butyl bromide ([DMC4]Br), dimethylaminoethyl methacrylate decyl bromide ([DMC10]Br), dimethylaminoethyl dimethylacrylate butyl bromide ([DM-C4-DM]Br2) and dimethylaminoethyl dimethylacrylate decyl bromide ([DM-C10-DM]Br2) were synthesized from dimethylaminoethyl methacrylate and different brominated alkanes. Their structures were determined by 1HNMR and FTIR. Their corresponding critical micelle concentrations were 16.20, 11.20, 25.61 and 16.13 mmol/L, respectively, by conductivity method. Styrene acrylonitrile copolymers (SAN) were prepared using [DMC10]Br, [DM-C10-DM]Br2 and sodium dodecyl sulfonate (SDS) as emulsifiers, respectively. When the amount of [DM-C10-DM]Br2 (based on total mass of monomers, the same below) was 4%, the conversion rate of monomers was 90.2%, and the particle size of SAN emulsion was 320.3 nm. The initial temperature of thermal decomposition of prepared SAN was 353 ℃, and the chemical oxygen demand (COD) of wastewater was 937 mg/L. The thermal decomposition temperature of SAN prepared by this emulsifier was 22℃ higher than that of SAN prepared by the same amount of SDS, and the wastewater COD was 1512 mg/L lower.

Abstract:The optimal macroporous adsorption resin for enrichment and purification of gardenia yellow pigment (GYP) was determined by dynamic screening methods. The purification conditions were optimized and amplified. The properties of before and after GYP purification and the inhibition effects of these two kinds of GYP on low density lipoprotein（LDL)oxidation modification were compared. The results showed as follows:NKA macroporous resin was the most suitable resin for the enrichment and purification of GYP. The optimal purification conditions were that sample mass concentration was 0.72g/L, sample flow rate was 2BV/h(BV isbed volume), sample volume was 27BV, the solutions for washing impurities were 7 BV distilled water and 9BV 15% ethanol , followed by desorption with 3BV 80% ethanol at a elution rate of 2BV/h. Compared withGYP before purification (GYP-1), the color value of GYP after purification(GYP-2) increased by 5.14 times, The absorbance ratio of geniposide, chlorogenic acid and GYP (OD1 and OD2) decreased from 2.65 and 1.01 to 0.69 and 0.684 under the above optimal purification conditions, respectively. The enlarged process of the optimal purification conditions had stable efficiency and good effect. The different concentrations of GYP-1 had a significantly inhibitory activity on oxidation of LDL and the inhibitory effectpresented a good dose-effect relationship. Compared with GYP-1, the inhibition efficiencies of GYP-2 with the same concentration were significantly enhanced against the generation of conjugated dienes (CD)and malondialdehyde (MDA) (P<0.01). The effects on retardingspectral red shift, inhibiting the changes of LDL appearance colors and microstructures during oxidation were also stronger than those of GYP-1.

Abstract:In order to remove the main carbon impurity methyldichlorosilane in the polysilicon raw material, it is converted into a high boiling point substance methyltrichlorosilane by a catalytic reaction. Pd/Al2O3 catalyst was prepared by impregnation method, and its physicochemical properties were characterized by X-ray fluorescence (XRF), X-ray powder diffraction (XRD), N2 adsorption desorption (BET), photoelectron spectroscopy (XPS) and H2 pulse chemisorption. Using a fixed-bed reactor under conditions where the chlorine source material is carbon tetrachloride, the catalytic effect of Pd/Al2O3 catalyst, The resin A catalyst and AlCl3/Al2O3 catalyst were compared. The effects of reaction temperature, reactant ratio, reaction space velocity and catalyst stability on the conversion of methyldichlorosilane were studied. The best process conditions were obtained. Pd/Al2O3 catalyst has better catalytic effect than The resin A catalyst and AlCl3/Al2O3 catalyst. When the chlorine source material is carbon tetrachloride, the reaction temperature is about 140 ℃、n(CH3Cl2SiH):n(CCl4)=3:1 and the space-time velocity of reaction solution is 5.0h-1, the maximum conversion rate of methyldichlorosilane can reach 69.76%.

Abstract:Abstract: Imidazolium chloride were synthesized via substitution reaction between N-alkylimidazole and dichloroalkane, then AlCl3 was added to complex to prepare seven chloroaluminate dication ionic liquids. The prepared ionic liquids were used to catalyze the condensation reaction between triethyl orthoformate and diethyl malonate to synthesize ethoxymethylenemalonate diethyl ester. The acidity of ionic liquids were measured by IR. The proposed reaction mechanism was analyzed by detecting the morphology of aluminum in catalysts by 27Al NMR. The effects of catalyst type, catalyst dosage, ratio of materials to solvent, reaction temperature, reaction time and catalyst recyclability on the reaction were investigated. The optimal process conditions were using 1,6-bis(N-methylimidazolyl)hexane chloroaluminate ionic liquid 〔[C6(Mim)2]Cl2-4AlCl3〕 as catalyst with its dosage of 0.8% (calculated based on molar amount of diethyl malonate), the molar ratios of triethyl orthoformate to diethyl malonate and to acetic anhydride at 1.75∶1.00∶2.50, with program temperature at 100 ℃ for 2 h and 140 ℃ for 6 h.Under these conditions, the conversion of diethyl malonate reached up to 98%, selectivity and yield of target product were 98% and 97%.

Abstract:The N-TiO2 intermediate was prepared by sol-gel method using butyl titanate and urea as titanium source and nitrogen source, respectively. The N-TiO2 intermediate were treated by N2 atmospheric calcination, “N2 plasma treatment + N2 atmospheric calcination” and “N2 atmospheric calcination + N2 plasma treatment”, which were noted as N-TiO2(C)、N-TiO2(LTP+C) and N-TiO2(C+LTP), respectively. The samples were evaluated under visible light irradiation for photocatalytic degradation of methyl orange (MO). To elucidate the plasma effect, XRD, TEM, EDS, UV-vis DRS and XPS techniques were used for catalyst characterization. Compared to N-TiO2(C), N-TiO2 treated by N2 plasma had smaller particle size, more responsive to visible light, and higher N content. Within 240 min of visible light irradiation, the photodegradation performance of N-TiO2 to MO was decreased in the sequence of N-TiO2(LTP+C)>N-TiO2(C+LTP)>N-TiO2(C), and the maximum degradation rate of N-TiO2(LTP+C) was 90%. The photodegradation performaces of three kinds of N-TiO2 on MO were consistent with the pseudo first-order kinetic equation.And the apparent rate constants of N-TiO2(LTP+C) and N-TiO2(C+LTP) were 4.5 times and 1.9 times that of N-TiO2, respectively. It was indicatded that the introduction of N2 plasma treatment in the preparation of N-TiO2 was beneficial to improve the surface dispersibility of N element, increase the incorporation of N element, and enhance the visible light photocatalytic activity of N-TiO2.“N2 plasma treatment + N2 atmospheric calcination” was the best method to prepare N-TiO2 visible photocatalysts.

Abstract:Boron nanosheets (B NSs) were prepared by coupling thermal oxidation etching and liquid exfoliation technology, and then B-PEG was prepared by modifying B NSs with surfactant (H2N-PEG-NH2). After that, the as-prepared B-PEG was used to produce B-PEG-cRGD composite by using RGD peptide (cRGD) as a monomer, ethylcarbodiimide (EDC) and N-hydroxysuccinimide (NHS) as initiators. Finally, DOX-17AAG@B-PEG-cRGD nano drug-loading complex was obtained by blending B-PEG-cRGD with the drug doxorubicin (DOX) and the heat shock protein inhibitor, allylamino-17-demethoxygeldanamycin (17AAG). The structure and morphology of B NSs and DOX-17AAG@B-PEG-cRGD composite were characterized by transmission electron microscopy (TEM), ultraviolet spectrophotometer, and dynamic light scattering (DLS). The results showed that the hydrodynamic average diameter of materials was 184 nm approximately and well dispersed. The results show that the hydrodynamic average diameter of DOX-17AAG@B-PEG-cRGD complex was 184 nm approximately and has good stability, which improves the defects of easy aggregation of B NSs. The in vitro drug release studies have shown that the complex has near-infrared light (NIR) and pH double responsiveness as well as good drug sustained release effect. When the pH value of the in vitro microenvironment was 5.0 and NIR was present, the cumulative release rates of DOX and 17AAG in 72 h were up to 66.53% and 73.01%.

Abstract:Abstract: Human glutathione-S-transferase isozyme pi 1 (hGSTP1) is a target to tackle resistance of tumor. To explore an immobilization method suitable for affinity-drive-exponential-enrichment through magnetic separation for the screening of high-affinity ligands of hGSTP1 from mixtures, immobilizations of hGSTP1 on zwitterion-coated magnetic beads functionalized with Ni2+-NTA and carboxyl were compared. The recombinant expressions of 6×his-hGSTP1 were purified by Ni2+-NTA agarose medium and GSH-Sepharose 4B column, respectively.The immobilization capacity, retention activity, stability and the response of immobilized hGSTP1 to inhibitors were characterized. Carboxyl-functionalized magnetic beads showed undetectable immobilization of hGSTP1 purified with GSH-Sepharose 4B column, but manifest immobilization of hGSTP1 purified with Ni2+-NTA agarose, yielding only ~30% retention activity of the free hGSTP1. While hGSTP1 purified with both media were immobilized on Ni2+-NTA magnetic bead with the retention activity of ~80% and the saturation immobilization capacity 1.7 times of that on carboxyl-functionalized magnetic beads. The immobilized hGSTP1 on Ni2+-NTA magnetic beads under stirring in PBS (pH 6.5) at 0 ℃ for 8 h showed insignificantly change in activity, while the free enzyme activity decreased about 20%; the further treatment with methanol at 80 ℃ for 20 minutes resulted negligible protein released, supporting its stability to the screening and the subsequent treatment. There was no significant difference in IC50 to Ethacrynic Acid of hGSTP1 immobilized on Ni2+-NTA comparing with that of free enzyme (P>0.05). Therefore, the immobilization of hGSTP1 on Ni2+-NTA magnetic beads is suitable for affinity-drive-exponential-enrichment of hGSTP1 inhibitors in the mixture for screening.

Abstract:Three kinds of green light-emitting iridium complexes (Ⅲ,Ⅳ,Ⅴ) were designed and synthesized using 5-methyl-2-phenylpridine (CH3ppy) as main ligand, 3,7-diethyl-4,6-nonanedione (detd), 2,2,6,6-tetramethyl-3,5-heptanedione（tmd）and acetylacetone (acac) as three ancillary ligands (LX), respectively. These compounds were characterized by 1HNMR, elemental analysis. The maximum absorption wavelengths of compounds III, IV, and V measured by UV-vis spectrum were between 250nm and 280 nm, and the maximum emission wavelengths of compound III, IV, and V measured by fluorescence emission spectrum (PL) were 530.8nm, 534.2nm and 524.8nm. Phosphorescent organic light-emitting diodes with the prepared complexes were constructed. The configurations of the devices are ITO/HAT-CN (15nm)/TAPC (50nm)/TCTA (5nm)/TCTA: X (8%, 15 nm)/Bepp2 (35nm)/LiF (1nm)/Al(150nm). The device based on compound Ⅲ exhibits the best overall performance in three devices. It has a brightness of 59125.2 cd/m2. In addition, it shows a maximum external quantum efficiency of 15.0%, a maximum current efficiency of 53.8 cd/A, and a maximum power efficiency of 62.1 lm/W with chromaticity coordinates x=0.30,y=0.62.

Abstract:Using potato starch as raw material, the starch was modified by biological method. Pullulanase can spe-cifically cut the α-1,6 glycosidic bond of the starch branch to increase the amylose content, thereby im-proving the performance of the starch film. Using Urea as plasticizer, starch nanocrystal (SNC) and nano zinc oxide (ZnO) as composite reinforcing agents, the composite film is prepared by casting method. The effects of the type and amount of plasticizer and the type and amount of reinforcing agent on the proper-ties of the composite membrane were investigated by single factor experiments. The amylolytic process was explored by orthogonal experiment. The optimal enzymatic hydrolysis process of potato starch was obtained by using the tensile strength of the composite membrane as the index: enzyme dosage 0.8U/g, reaction temperature 50 °C, pH 4.0, reaction time 2h. Compared with the non-enzymatic composite membrane, the tensile strength of potato starch composite film increased by 19%, the elongation at break increased by 42.8%, the transparency increased by 5.6%, the haze decreased by 67.4%, and the water vapor transmission coefficient decreased by 98.4%, Oil permeability coefficient decreased by 52.6%.

Abstract:Abstract: The activated carbon fiber (ACF) was fabricated of natural hollow metaplexis japonica seed hair fiber(Mj-fiber) successfully through dewaxing, activation by phosphoric acid and carbonization process at high temperature. The micromorphology and aggregate structure of the ACF were characterized by SEM、XRD、Roman and BET. The results demonstrate that our as-prepared ACF, with graphite-like microcrystalline and disorder structure, possesses high hollow characteristic and surface morphology of multi-stage pores distribution. The total pore volume and specific surface area of our ACF is 1.357 cm3/g and 1882.003 m2/g, respectively. More importantly, the ACF displays excellent absorbility of methylene blue dye molecules in solution. The sorption processes of our ACF follow the pseudo-second-order kinetic equation and the adsorption isotherm conforms to the Langmuir model. The physical absorption dominates, and the theoretical maximum adsorption capacity can reach up to 947.372 mg/g. Furthermore, the adsorption Gibbs free energy △G0<0 and the adsorption enthalpy change △H0>0, obtained from the results of thermodynamic analysis, indicating the absorption behavior is a spontaneous process and positively correlated with temperature. In addition, the effects of pH and electrolyte concentration on the adsorption properties of ACF were analyzed systematically.

Abstract:Lanthanum alpha-ketoglutarate was prepared by two-step method using alpha-ketoglutarate, lanthanum nitrate and sodium hydroxide as raw materials and water as solvent. The structure of the product was characterized by elemental analysis, ICP-OES and FTIR. The static thermal stability of the product to PVC was tested by Congo red test paper, the dynamic thermal stability of the product to PVC was tested by torque rheometer, and the effect of the product on the thermal degradation kinetics of PVC was studied by TGA. The synergistic properties of the product were investigated by compounding with auxiliary thermal stabilizers such as beta-dione, PDOP, PER and ESO, and the microscopic surface morphology of PVC degraded at different time was observed by SEM. The results showed that lanthanum alpha-ketoglutarate has good thermal stability for PVC. When 3 wt% was added, the static thermal stabilization time could reach 13 min and the dynamic thermal stabilization time could reach 1820 s. The average activation energy of PVC thermal degradation process could be increased by 15.78 KJ/mol. The synergistic effect between PER and the composite thermal stabilizer was the best. The static thermal stabilization time of composite thermal stabilizer for PVC was 37 min and the dynamic thermal stabilization time was 3480 s. SEM observation showed that the composite heat stabilizer could better inhibit the agglomeration of PVC.

Abstract:In order to improve the dyeing properties of naphthoquinone natural dyes on cotton fabrics, the compound of citric acid and tartaric acid was used for crosslinking dyeing. The structure of cotton fabrics before and after dyeing was analyzed by SEM and FTIR, the dyeing properties, the physical properties and the dyeing mechanism of cotton fabrics before and after dyeing were also discussed. The results showed that the 1, 4-naphthoquinone natural dyes were bonded to the fabrics by ester bonds, the surface of cotton fabrics became rough after crosslinking dyeing.Compared with direct dyeing cotton fabrics, the dyeing rate and K/S value of the cotton fabrics of crosslinking dyeing with citric acid and tartaric acid were increased by 21% and 83% respectively,the good levelness property was obtained. At the same time, the yellow light and the color saturation increased, and the rubbing fastness and washing fastness increased by about 1~3 levels, the crease resistance was enhanced by about 50%，and the water contact angle increased by 9% .

Abstract:The formaldehyde-free phosphorus-nitrogen flame retardant was synthesized by using dimethyl phosphite, acrylamide and cyanuric chloride and the cotton fabric was flame-retarded by the rolling and baking process. The structure of the intermediate and flame retardant was characterized by infrared spectroscopy. The structure, surface morphology and elemental composition of the finished fabric were characterized by infrared spectroscopy and electron microscopy. The flame retardant properties of the finished fabric were tested by limiting oxygen index, vertical burning and cone calorimetry. The thermal stability of the finished fabric was tested by thermogravimetry. The results show that the flame retardant is successfully finished on the fabric, and the maximum thermal decomposition rate of the finished fabric is reduced, and the carbon residue rate is improved. The limiting oxygen index of the finished fabric increased from 18% to 31%, the afterburning time, the smoldering time decreased from 9 s, 25s to 0 s, and the damage length decreased from 300 mm to 74 mm. The maximum heat release rate (PHRR) of the finished fabric was reduced from 203.5 kW?m-2 to 57.9 kW?m-2, and the total heat of release (THR) was reduced from 6.0 MJ?m-2 to 2.7 MJ?m-2.

Abstract:AFOP-10（anionic-nonionic emulsified viscosity reducer）was synthesized from bisphenol AF(BPAF), p-hydroxybenzenesulfonic acid(PHSA), and polyoxyethylene octyl phenol ether-10(OP-10). The surface properties, the temperature resistance and salt tolerance performance was tested. The structure-function relationship was studied, and the mechanism of the emulsified viscosity reducer was preliminarily explored. The results showed that the HLB of AFOP-10 was 11.37, the turbidity point(Tk) was 75℃, the critical micelle concentration（cmc）was 0.08 g/L, and the surface tension of AFOP-10 was 30.30 mN/m. AFOP-10 showed good surface activity. The thermal degradation temperature of AFOP-10 was 363℃. The maximum salt-tolerant concentration of the emulsified viscosity reducer was 49476 mg/L with the molar ratio of BPAF, PHSA and OP-10 1∶6∶9. In the simulated brine system with salinity of 8246 mg/L, AFOP-10 still had good activity after aged at 300℃ for 24 h. The viscosity reduction rate could reach more than 98.50%. AFOP-10 had good emulsification and viscosity reduction effect on oils in different areas of Bohai Oilfield, and it had good universality.

Abstract:To solve the problems such as high-rate reaction with rocks, strong corrosion and environmental pollution of conventional acid fluids in acid fracturing of high temperature and deep reservoirs, an environmental-friendly crosslinked acid (EAC-1) with heat resistance was prepared by solution blending method with lactic acid, gluconic acid, polyethyleneimine (PEI) and thickener acrylamide polymer as raw materials. The synergistic mechanism of CaCO3 dissolved by complex acid with lactic acid and gluconic acid, rheology, microstructures and gel breaking properties of crosslinked acid (EAC-1) were analyzed by FTIR, rheological test and SEM, etc. The reaction rate constant and reaction kinetic equation of crosslinked acid were also determined. The results showed that when the molar ratio of lactic acid to gluconic acid was 1:1, lactic acid and gluconic acid could form a high-solubility chelate with Ca2+ through covalent bond, and no secondary precipitation happened in the residual acid. The viscosity of crosslinked acid could maintain above 50 mPa·s at 170 s-1 and 110℃; the three-dimensional network structure in acid fluid formed by PEI and thickener improved the temperature and shear resistance. The crosslinked acid was broken evenly without residues, and the viscosity of gel breaking fluid was 4.2 mPa·s. The reaction rate constant of EAC-1 was at least one order of magnitude less than that of HC-1 with hydrochloric acid as the main acid, showing that crosslinked acid (EAC-1) had good retarding effect for prolonging the effective action distance of acid fluid in acidizing fracturing.

Abstract:The feasibility of polymer flooding in high-temperature and high-salinity reservoir by using diutan gum was explored. Xanthan gum and konjac gum were used as comparison to investigate the rheological property, the capability of mobility control and EOR (enhanced oil recovery). The results of steady-state rheological property and mobility control show that the order of the capability of thickening and mobility control in porous media are as follows: diutan gum > xanthan gum > konjac gum. Compared with the other two biopolysaccharides, diutan gum has better temperature- and salinity-tolerance characteristics and good long-term stability in high-temperature environment. Based on the wettability modification of quartz sand surface (modified into oil wet) and the changes of hydrodynamics radius of the injected and produced fluids, the main mechanism of establishing resistance of three biopolysaccharides was analyzed. For konjac gum, xanthan gum and diutan gum, the contribution rate of mechanical trapping to the dynamic retention of porous media was 45.90%, 60.78% and 81.83%, respectively. The larger hydrodynamics radius of the diutan gum makes it easier to be trapped by porous media, and the ability to reduce the water phase permeability in porous media is stronger. Additionally, in the laboratory oil displacement experiment, the EOR of diutan gum is up to 24.31% OOIP (original oil in place), which is significantly higher than xanthan gum (17.02% OOIP) and konjac gum (8.19% OOIP). It is expected to be a promising oil displacement agent for enhanced heavy oil recovery in high-temperature and high-salinity reservoirs.

Abstract:A series of SiO2 microspheres with different particle sizes were prepared by sol-gel method. SiO2@PDA microspheres with different particle sizes were prepared by using polydopamine as black light absorbing material. SiO2@PDA microspheres were deposited on the surface of the white polyester fabric by gravity deposition. The high structural color fabric with high colorfastness was prepared by adding a lab synthesized adhesive poly(glycidyl methacrylate-co-hexafluorobutyl acrylat)-g-polyethylene glycol methacrylate (P(GMA-co-FHBMA)-g-PEGMA). The SiO2 microspheres, SiO2@PDA microspheres and structural color fabrics were characterized by Malvern high sensitive nano-particle size analyzer, SEM Datacolor colorimeter and measuring microscope. The relationship between the amount of dopamine and the particle size, morphology and fabric structure color of SiO2 @ PDA microspheres was investigated. The effect of adhesive dosage on structural color fastness and colouration was studied. The results showed that the SiO2 microspheres prepared in this experiment have uniform particle size and good monodispersity. The particle size of the prepared SiO2@PDA microspheres increased with the increasing of dopamine content, thus to make the structure color of the fabric red-shift. However, the excessive addition of dopamine would make the microspheres rough and reduce the particle size uniformity, monodispersity of the microspheres and the brightness of the structural color. The addition of the P(GMA-co-FHBMA)-g-PEGMA adhesive could inhibit structural color cracking improving the fastness.

Abstract:N-Isobornyl Acrylamide (NIBAM) was synthesized from acrylonitrile and natural renewable resource camphene under solvent-free conditions. Effects of the types and the dosages of catalysts, molar ratio of camphene to acrylonitrile and water, reaction temperature and reaction time on the reaction selectivity and the yield of NIBAM were investigated, and the optimum reaction conditions were determined by or-thogonal tests as follows: the molar ratio of camphene to acrylonitrile and water was 1:3:1; FeCl3 was adopted as the catalyst, and the amount of FeCl3 was 10%; reaction temperature 120 ℃, reaction time 12 h. The reaction electivity and the average yield of NIBAM under the aforesaid conditions were 90.3% and 97.6%, respectively. The structure of NIBAM was determined by HRMS, FT-IR and NMR.