Abstract:A kind of steady polyaniline (PANI) emulsion was prepared in this paper by chemical oxidative polymerization with SDS as emulsi?er and dopant. The phosphate-fluorocarbon acrylate (P-FAc) emulsion was also prepared. And the composite emulsion coatings of PANI/P-FAc was obtained by adding different proportions of PANI emulsion into P-FAc emulsion. The chemical structure of PANI and P-FAc were characterized by Fourier transform infrared spectroscopy. The contact angle, adhesion, potentiodynamic polarization curves, open circuit potential and electrochemical impedance spectroscopy were used to assess the anticorrosion properties of the PANI/P-FAc coatings for Q235 steel. The surface morphology of Q235 steel which removed PANI/P-FAc coating were observed by scanning electron microscope. The results showed that the coating has the best anticorrosion properties when the proportion of P-FA emulsion and PANI emulsion was 1:1. The corrosion current density was only 1.09?0-6 A/cm2, the equilibrium potential was -0.55V, and the impedance modulus reached 104.3Ω.

Abstract:The polyacrylate emulsions with 60% solid content were prepared by miniemulsion polymerization via sodium dodecyl sulfate (SDS) as emulsifier and n-butanol as co-stabilizer. The effects of SDS content on the gel rate, conversion rate and rotational viscosity of high solid emulsion were investigated. Furthermore, the emulsion viscosity, particle size and distribution of polyacrylate emulsions were studied with increase of solid content. The results showed that emulsion gels decreased first and then increased, conversion rate was not changed obviously, rotary viscosity increased with the increase of the amount of SDS. With the increase of emulsion solid content, the emulsion viscosity, particle size and distribution increased significantly. The results of TEM that were high solid content emulsion showed wider particle size distribution, which was consistent with DLS results. Application results showed that dry-wet rubbing fastness and gas permeability treated with high solid content emulsion were improved, the mechanical properties were not change compared with these of the commercial leather finishing agent.

Abstract:Thiourea base rosin imidazoline quaternary ammonium salt was synthesized with raw material which are rosin, diethylenetriamine, 3-chlorinum-2-hydroxyl propane sulfonic acid sodium and thiourea, and the structure of thiourea base rosin imidazoline quaternary ammonium salt was characterized by FT-IR and 13C NMR. The corrosion performance of thiourea base rosin imidazoline quaternary ammonium salt was studied by static weight-loss method and electrochemical method through acidic medium, and the mechanism of homemade corrosion inhibitor was explained by the theory of film forming and the molecular structure of the corrosion inhibitor. The results showed that the inhibition efficiency could reach 90.81% in the mass fraction of 15% hydrochloric acid and add the quality of hydrochloric acid 0.4% imidazoline corrosion inhibitor at 30℃, and the homemade inhibitor was adsorped on the surface of carbon steel mainly by adsorption founction.

Abstract:Activated carbon(AC) modified with different transition metal was studied for carbon disulfide(CS2) removal efficiency at ambient temperature. The effects of impregnants, adsorption temperature and regeneration performance were investigated. The adsorbents were characterized by employing N2-physical adsorption, FE-SEM and XRD. The results showed that The number of microporous of AC treated by K2CO3 significantly increased. The active sites were existed in the form of Cu2O after modified with Cu(NO3)2, and the soft acid of AC were improved, which promoted the complexation with CS2. However, silver ions were reduced to Ag0 in the surface of AC, and the complexation were lower. Activated carbon modified with K2CO3-Cu(NO3)2 (denoted as CuKAC) was found to have markedly enhanced adsorption capacity, and the adsorption capacity reached 77.32mg/g. The adsorption capacity showed high dependent on adsorption temperature. The best adsorption temperature was 20℃. CuKAC can be fully regenerated using hot nitrogen at 200℃, and the adsorption capacity remained stable even after ten cycles of regeneration.

Abstract:Modification of natural polysaccharide polymer to prepare a bioadsorbent for toxic metal is one of the hotspot research on wastewater treatment. The hydrogel (SAH) with three-dimensional structure was fast synthesized under microwave by graft copolymerization of cassava starch and acrylic acid. The SAH was used as an adsorbent of Pb2 , and the effects of microwave power, pH, temperature, contact time and initial Pb2 concentration on the adsorption were investigated. The adsorption mechanism of SAH was studied by the characterization of SEM、FTIR、XPS. It was found that the SAH with macroporous structure could adsorb Pb2 mainly by the formation of a complex with bidentate structures. The SAH with a maximum adsorption capacity of 561 mg/g could be reused. Furthermore, the adsorption of SAH to Pb2 was accurately described by a pseudo-second-order kinetic model and the initial concentration-dependent adsorption isotherm suggested a Langmuir isotherm model.

Abstract:Abstract：Polyurethane prepolymer (PU) was prepared via the acetone process using isophorone diisocyanate (IPDI), polybutylene adipate (CMA-1044), 1,4-butanediol (BDO) and dimethylolpropionic acid (DMPA) as raw materials. Hyperbranched polyurethane (HBPU) was synthesized through modification of PU by hydroxyl-terminated hyperbranched polymer. Then, novel fluoroalkyl-terminated hyperbranched polyurethane (HBPUF) was prepared by the grafting reaction of perfluorohexyl ethyl alcohol and HBPU. Finally, HBPUF emulsion was obtained by neutralization, adding water, and high-speed stirring operations. Infrared spectrum (IR), proton nuclear magnetic resonance (1H NMR), Transmission electron microscope (TEM), nano particle size, thermogravimetry analyzer (TGA), X-ray photoelectron spectroscopy (XPS) and static contact angle analyzer were utilized to characterize structure of the resultants, particle morphology and average size, thermal stability, chemical compositions as well as hydrophobicity of the latex film. Results showed that fluorinated monoalcohol was successfully linked to the HBPU end to form HBPUF. HBPUF latex possessed the core-shell particle structure and the favorable stability. Thermal stability of HBPUF film was enhanced by comparison with PU and HBPU films. The fluoroalkyl groups had the tendency to enrich at the film-air interface by XPS, which engendered water contact angle on HBPUF film increase from 77.8?on PU film to 113.9?and water absorption of HBPUF film reduce from 136.2% of PU film to 11.1%. Hydrophobicity of the HBPUF film was accordingly improved.

Abstract:A series of branched polymer surfactant (PSA) was prepared by using hydrogen silicone oil (PHMS), allyl polyether(FB1000) and different content of eighteen acrylic ester(SA) as raw materials. The structure and the solution property of polymer was characterized and investigated by infrared spectroscopy (FT-IR), nuclear magnetic resonance(NMR), gel permeation chromatography(GPC), surface tension, dynamic light scattering (DLS) and fluorescence spectroscopy (FLD). With the increase of SA content, it is easier for polymer to associate and aggregate together to form micelles, the particle size increased from 71.40nm to 141.07nm and the dispersion coefficient increased to 0.396. Moreover, the surface tension of polymer solution reduced to 24.20mN/m, and critical micelle concentration (cmc) decreased to 0.49g/L as increasing the content of hydrophobic groups. The fluorescence spectra showed that hydrophobic microdomain was formed with an increase in the PSA concentration, and the first and third emission peak ratio gradually decreased. Pyrene molecules dissolved into the micelles and I1/I3 value kept almost invariable when the PSA concentration was greater than the critical aggregation concentration (cac). The demulsification experiments demonstrated that the dewatering ratio of PSA demulsifier is up to 93%.

Abstract:Abstract:A hydrophobically associating polymer HAWP-18 was synthesized by using a functional hydrophobic monomer, acrylamide (AM), acrylic acid (AA) and 2-Acrylamido-2-methylpropane sulfonic acid (AMPS) as raw materials. Properties of shearing resistance, viscoelasticity and thixotropy of hydrophobic associating polymer HAWP-18 was investigated by using rheometer. The results show that HAWP-18 solutions were pseudoplastic fluid and exhibited stronger shearing resistance, and the critical associating concentration of HAWP-18 solution was 2.31g/L. According to the viscoelasticity results, HAWP-18 is a typical viscoelastic structure fluid and has a relatively wide linear viscoelastic region. The value of storage modulus (G') is larger than loss modulus (G''). The higher the viscosity was, the stronger the elastic characteristic of HAWP-18 was. The variation of shear stress with shear rate was also discussed by using steady-state shear test of HAWP-18 with different mass concentrations. It was shown that HAWP-18 had thixotropy property. With the increment of the mass concentration, the thixotropy property enhanced. The drag reduction property of HAWP-18 solutions with different mass concentrations was tested by using homemade friction tester. The drag reduction test showed that the drag reduction rate of HAWP-18 increased at first and decreased latter with the increment of the HAWP-18. The shearing resistance, good viscoelasticity, thixotropy, and drag reduction of HAWP-18 provide experimental support for its application in fracturing fluids.

Abstract:Two “D-π-A” type coumarin photosensitizers were synthesized with 7-diarylamino coumarin as the donor, dithiophene or phenylthiophene as the π-bridge, and cyanoacetic acid as the acceptor. Their structures were confirmed by 1H NMR and HRMS and their UV-vis absorption spectra and fluorescence emission spectra were measured. The geometric structures of these dyes were optimized using density functional theory (DFT) in conjunction with the d-polarized 6-31G(d) basis set. Time-dependent density functional theory (TD-DFT) was further used to calculate the absorption spectra and the emission spectra and the structure-property relationship was analyzed. The results showed that 7-difluorenylamino coumarin photosensitizers exhibited relatively smaller energy gap at the ground state (2.31 eV and 2.49 eV) than 7-diphenylamino coumarin photosensitizers (2.49 eV and 2.62 eV) and their energy gap of the excited state was also reduced by 0.52 eV and 0.42 eV respectively. Compared with photosensitizers with phenylthiophene π-bridge, photosensitizers with dithiophene π-bridge had better molecular planarity and their maximum absorption wavelength was shifted bathochromically by 19 nm and 4 nm respectively and the maximum emission wavelength was shifted bathochromically by 16 nm and 9 nm respectively.

Abstract:A series of cation polyurethane surfactants blocked by aliphatic alcohol ether were synthesized by the polymerization reaction between 3-isocyanatomethyl-3,5,5-trimethyisocyana- te (IPDI) ?N - methyl diethanolamine (MDEA) and aliphatic alcohol ether with different long chain alkyls（AEO-2、AEO-5、AEO-9、O-2、O-5、O-10）. Their chemical structure were characterized and confirmed by FT-IR analysis. The effects of the carbon number in alcohol ether ?altyl phenol polyoxyethylene as well as additional elect rolyte on the surface tension and critical micelle concentration were researched. The results showed that when the aliphatic alcohol ather is O-5,the surfactant has excellent燾omprehensive performance, and its critical micelle concentration is 0.0379g/L with the surface tension of 34.142mN/m.

Abstract:Halloysite nanotubes（HNTs）/waterborne epoxy resin composite material was prepared through ultrasonic dispersion and mechanical blending. The morphology of HNTs and composites were characterized by transmission electron microscopy(TEM) and scanning electron microscopy(SEM). It was found that HNTs displayed as nanotubes with hollow structure. HNTs were able to disperse uniformly in composites when HNTs content was lower than 2%. The fracture characteristic of film transferred from brittle fracture to ductile fracture. However, aggregation took place when the HNTs content was greater than 5%. Effects of HNTs content on the rheology, thermal stability and film performance of waterborne epoxy system were systematically investigated. The results showed that the thermal stability of composites was enhanced with the HNTs addition, The viscosity and storage modulus were increased with appropriate amount of HNTs, and the loss factor decreased. It suggested that the HNTs can functionalized as crosslinking points in composites and thereby improve the composite stability, and the optimum content was 2%. In addition, the water resistance of composite was enhanced, as well as the hardness and flexibility of film. However, excessive HNTs would destroy the crosslinking structure and be unfavorable to the stability and comprehensive properties of composite films.

Abstract:In this study, different contents of corn stover lignin were used to blend with epoxy resin at 100 oC to modify the epoxy resin. The effect of content of lignin on the properties of the modified epoxy resin was studied by the characterization of the viscosity of modified resin, and the mechanical properties, dynamic mechanical analysis, the thermal stability and the combustion properties for modified resin cured by polyamine. The results show that, with the increase of the content of the lignin, the viscosity of the modified epoxy resin increases, and the bending strength for the cured epoxy resin first increases and then decreases. The impact strength decreases with the increase of the content of lignin. The glass transition temperature for cured epoxy resin increases with increasing the content of lignin, and the thermal stability for modified epoxy resin is also improved. The addition of lignin can improve the flame retardancy of epoxy resin.

Abstract:Compound calix[4]arene, namely 5,11,13,17–tertbutyl–26,28–dihydroxy–25,27–di[2–[4– (N,N–diethoxyformyl amino)phenyl–4,5–diphenyl–1H–imidazol–1]–yl–butoxycalix[4]arene (M) modified with ethoxyformyl aminoimidazole was synthesized and characterized as a fluorescent probe. Its recognition properties for metal ions were determined by UV and fluorescent spectra in the CH3OH/H2O (VCH3OH/VH2O = 3/7, Tris–HCl buffer aqueous, pH=6.5). The results indicated that compound M expressed high selectivity and sensitivity for Al3+ (1:1) and Ag+ (1:2) without interruption in the presence of other metal ions. Meanwhile, when Al3+ than Ag+ ions coexisted, the fluorescent intensity between compound M and Al3+ were observed. Compared with other calix[4]arene derivatives, compound M realized the recognition with Al3+ than Ag+ ions in the aqueous solution.

Abstract:In an attempt to search for natural product-based antifungal agents, α-campholenic aldehyde (III) was prepared by epoxidation and catalytic isomerization of α-pinene (I), and then converted into -campholenic (IV) acid and its acylchloride (V). Eight novel N-(4-(N-substituted sulfamoyl) phenyl)-α-campholenamide Ⅵa～Ⅵh were synthesized by N-acylation reaction of the acylchloride with various 4-amino-N-substituted benzenesulfonamide in 32.8~78.1% yield. All the target compounds were characterized by FTIR, 1HNMR, 13CNMR and ESI-MS. Antifungal activity test showed that, at the concentration of 50 µg/mL, all the target compounds exhibited a certain antifungal activity, in which compound N-[4-(N-(thiazol-2-yl)sulfamoyl)phenyl]-α-campholenamide(VIe) had inhibition ratio of 71.3% (B-class activity level) and 68.0% (C-class activity level) against Fusarium graminearum and Fusarium oxysporum f. cucumerinum, respectively.

Abstract:Five novel acylhydrazone compounds of isopimaric acid (Ⅲa～Ⅲe) were synthesized from isopimaric acid (IPA) by a three step pathway (acyl chlorination, hydrazinolysis and condensation). The structures of the newly synthesized compounds were confirmed by IR, 1H NMR, 13C NMR and MS. The inhibitory activities of compounds Ⅲa～Ⅲe against mice HepG2 cell lines were carried out by MTT assay. The anticancer activity assay showed that compounds Ⅲa and Ⅲc exhibited notable inhibitory effect on HepG2 cancer cell lines at 100 μM with the inhibition rate of 75.42 % and 70.50 %, respectively.

Abstract:In this paper，curcuminoids from the rhizomes of turmeric, including curcumin (CUR), demethoxycurcumin (DMC), and bisdemethoxycurcumin (BDMC), were isolated by selective adsorption using cyclodextrin polymers as adsorbents. Firstly, the apparent formation constants (Kf) for β-CD with three curcuminoids were measured by fluorescence spectroscopy, the values were 28.04, 73.03, and 110.83 L/mol, indicating that the strength of the interactions between β-CD and curcuminoids is BDMC > DMC > CUR. Then, six kinds of cyclodextrin polymers were prepared and HP-β-CDP1 is the best adsorbent for the separation. The adsorption kinetics and isothermal adsorption experiments were carried out by HP-β-CDP1. It was obtained that the adsorption reached equilibrium within about 60 min and the adsorption behavior could well be depicted by Freundlich equations and pseudo-second-order kinetic model．In addition, The separation factors (α) of DMC and CUR (α21), BDMC and DMC (α32), BDMC and CUR (α31), were about 2 ~ 3, 2.4 ~ 4.1, and 5 ~ 11, respectively. Affter the absorption, the content of CUR, DMC, and BDMC were 88.2%, 10%, and 0.4%, respectively. The results show that CUR, DMC, and BDMC can be selectively separated from commercially available curcumin (CACur) with cyclodextrin polymers.

Abstract:Two new morpholine ionic liquid heteropolyacid salts were synthesized by a two-step proceeding. They were [C3SO3Hnhm]3PW12O40 and [Nbmm]3PW12O40. The structure of IL was characterized by FT-IR and 1H NMR spectra. The thermal stability was characterized by TG. At the same times, the solubility of ionic liquid heteropolyacid salt was also studied. In addition, the catalytic activity of [C3SO3Hnhm]3PW12O40 for the transesterification of soybean with methanol was investigated. The results show that under the optimized conditions of n(methanol):n(soybean)=14:1, catalyst dosage was 4%, reaction temperature was 100 oC and reaction time was 6 h, the yield of biodiesel up to 94.90%. The IL could reuse more than 6 times, and it will without a significant decrease in activity after regeneration by drying under vacuum. During the transesterification process, [C3SO3Hnhm]3PW12O40 was self separation catalyst induced by the reaction. The catalytic activity was increased and the catalyst was easy to be recycled and used repeatedly, which was due to [C3SO3Hnhm]3PW12O40 has the characteristic of homogeneous reaction in the high temperature and heterogeneous separation in the low temperature.

Abstract:In this paper natural basalt was used as a catalyst for pyrolysis of methane. The composition, structure and surface species of the catalyst were investigated by XRF, XRD, SEM and XPS techniques. Catalytic properties of basalt catalyst were studied for methane catalytic pyrolysis under different reaction temperature and space velocity in a fixed bed reactor. At the condition of GHSV 4 L?h-1 and 1225 K, the conversion of methane was 7.66 % and the selectivity of C2 was 33.64 %. When the temperature reach up to 1325 K, the conversion of methane increased to 17.13 % while the selectivity of C2 reduced to 27.21 %. Under the same temperature, the selectivity of ethane increased with the increasing gas space velocity, however, the selectivity of acetylene reduced. The reactive activity of basalt decreased because the aromatic type of coke formed at the external surface.

Abstract:In order to enhance the transdermal penetration of CoQ10-loaded nanostructured lipid carriers (CoQ10-NLC), penetration enhancer--quaternized chitosan (QCS) was used to modify the surface of CoQ10-NLC. The self-aggregation behavior of QCS molecular chain was also studied to illuminate the formation mechanism of QCS-CoQ10-NLC. And QCS-CoQ10-NLC with particle size around 500 nm were prepared. In addition, the transdermal penetration of QCS-CoQ10-NLC was investigated by in-vitro transdermal study, the result showed that lipid carriers modified by QCS at 0.5% (w/w) could obviously improve the transdermal penetration of CoQ10 in the skin.

Abstract:The menthyl nylon acid was synthesized and the synthesis process was optimized through single-factor experiment. The main components of menthyl nylon acid were analyzed and characterized by IR, 1H-NMR and HR-MS spectra. The thermal mass loss, pyrolysis temperature and pyrolysis products of menthyl nylon acid were investigated by thermogravimetry-derivative thermogravimetry anaylsis(TG-DTG) and pyrolysis gas chromatography/mass spectrometry (Py-GC/MS), and the sensory evaluations were carried out. The results showed that: 1) the yield of menthyl nylon acid reached 89.3% under the optimum condition. 2) the weight loss rate of menthyl nylon acid was the fastest at 301.5 ℃, the weight loss reached 100% at 341.6 ℃; the main pyrolysis products of menthyl nylon acid was L-menthol in 300~450 ℃, which reduced with the increase of pyrolysis temperature. 3) the menthyl nylon acid had obvious effects on mellow and sensory coziness of the cigarettes, and it was better than the single menthyl non-volatile organic acid in improving the sensory quality of cigarettes.