Abstract:In order to obtain water-soluble Fe3O4 nanoparticles (NPs), fast ligand exchange method was applied to make hydrophobic oleic acid coated Fe3O4 NPs turn into water-soluble PEG [PEG = poly(ethylene glycol)] phosphate coated Fe3O4 NPs using PEG phosphate as the hydrophilic ligand in toluene/tetrahydrofuran (THF)/water ternary mixed solvent system. The effect of THF on the ligand-exchange rate was studied. The NPs were characterized by means of TEM, DLS, XRD, FTIR and VSM, respectively. Results showed that THF solvent could promote effective contact of PEG phosphate molecules with the surface of Fe3O4 NPs, and make oleic acid molecules rapidly desorbe from the surface of the NPs, in addition, they eliminated the emulsification during the ligand exchange process. A rapid ligand exchange method used to prepare the water-soluble PEG phosphate coated Fe3O4 NPs was achieved by using of THF solvent.

Abstract:In this paper, poly(ethylene glycol)/poly(vinyl alcohol)/poly(acrylic acid) superabsorbent resin was prepared by solution polymerization using poly(ethylene glycol) (PEG), part of neutral acrylic acid(AA) and poly(vinyl alcohol) (PVA) as raw materials. N, N-methylenebisacrylamide and ammonium persulfate were used as crosslinker and initiator, respectively. The structures and performance of composite resin were studied by FTIR, XRD, TG and SEM. The effects of PVA content, PEG content, acrylic acid neutralization degree, reaction temperature on product water-absorbing performance were evaluated. The results showed that the neutralization degree of acrylic acid was 75%, the polymerization temperature was 75℃, the mass fraction of initiator was 1.1%, the mass fraction of cross-linker was 0.3%, the mass fraction of PEG was 10% and the mass fraction of PVA was 15%, the maximum distilled water absorption ability of superabsorbent resin was 935 g/g, salt water absorption rate reached up to 91 g/g燼nd has good water retention performance.

Abstract:A novel dual functional dendritic monomer containing thermo-responsive and light-responsive groups was designed and prepared via a multi-step process of the diazotization, reduction, substitution, etherification and esterification reaction. The chemical structure of monomer was confirmed by infrared spectroscopy (FTIR), nuclear magnetic resonance (1HNMR and 13CNMR) and mass spectrometry (MS) techniques. The thermo- and light-responsive behaviors of the monomer in water was investigated by ultraviolet and visible spectrophotometry (UV-Vis). The results showed that the lower critical solution temperature (LCST) of the monomer aqueous solution (1 mg/mL) was 12.5 °C and decreased by 6.3 °C after UV light irradiation, meanwhile, it has a good reversibility to the UV-Vis absorption of monomer aqueous solution.

Abstract:The water dispersion of reduced graphene oxide (rGO) was prepared by reducing the graphene oxide (GO) with sodium borohydride, and three-dimensional ordered polyaniline-graphene nanocomposite with high-surface-area was successfully fabricated via in situ chemical oxidative polymerization. The surface morphology and structure were investigated by using field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray photoelectron spectrometer (XPS) and X-ray diffraction (XRD). The results exhibited that the surface area of the nanocomposite was as high as 131 m2/g which was higher than that of pure PANI (32.71 m2/g), and polyaniline (PANI) nanorods with diameter of 10~20 nm were uniformly aligned on surfaces of rGO nanosheet. The composite had a high specific capacitance of 358 F/g at a charge-discharge current density of 0.5 A/g, which was higher than that of rGO and pure PANI. The capacitance retention ratio of the composite reached 74.3% when the current density increased from 0.5 to 10 A/g, indicating enhanced rate performance. Furthermore, the composite showed 83.7% capacitance retention after 500 cycles charge-discharge at high current density of 10 A/g.

Abstract:In order to study the solvent effect of organogels, aromatic alcohol derivatives containing single chain alkoxy, S-C12/ S-C14/ S-C16, and three chain alkoxy T-C14 were synthesized. The gelation properties of compounds were tested and the impact of the number of side chains was analyzed by comparison. Gelation test showed that the aromatic alcohol derivatives can readily form stable gels in a variety of organic solvents. Anion test showed that the series of gels can respond to anionic stimulation. The microstructure of gels was observed and analyzed by SEM, the driving force of the gel formation was investigated by 1HNMR and IR. Through the method of Teas parameter, the characteristics of interaction between the series of gelators and the solvents were analyzed and summarized, in addition the prediction region of S-C14 where could form gels in unknown solvents was obtained and the validity of it was verified. To further investigate the solvent effect of intermolecular hydrogen bonding gelators, the hydrogen bond donor ability, the hydrogen bond acceptor ability and the polarisability of solvents which effect the gel performance were analyzed by Kamlet-Taft parameter. In addition, the validity of the conclusions was verified by other gelators.

Abstract:Abstract: A novel modified poly (aspartic acid)/poly (acrylic acid) composite absorbent resin was prepared with Acrylic acid (AA) as the monomer, potassium persulfate (KPS) as the initiator and modified poly (aspartic acid) (MKPAsp) as the crosslinking agent in an aqueous system. The absorbent resin was characterized by infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and thermal gravimetric analysis (TGA). SEM confirmed that the introduction of PAA into the network structure can optimize the pore channel structure, increase the pore density and make the pore sizes become uniform. The swelling properties of the composite resin in different temperature, pH and salt solutions were investigated in this study, the results showed that the LCST of MKPAsp/PAA composite absorbent resin was10℃ high than that of KPAsp, which suggested that MKPAsp/PAA composite absorbent resin had a better temperature sensitivity. The composite absorbent resin had the best swelling ratios at pH=6 and 10; the salt tolerance of the composite resin was significantly enhanced and the absorbency order in different chloride salt solutions was: Na > Fe3 > Ca2 . The optimum swelling ratios of the prepared MKPAsp/PAA composite absorbent resin in distilledwater and 90 mmol/L NaCl solution were 886.7g/g and 165.1g/g respectively, which were enhanced by 3.9 and 2.3 times than that of KPAsp resin.

Abstract:The effects of various extractants on removal of aromatics of naphtha derived from the hydrogenation fraction of low temperature coal tar(coal-derived naphtha) were investigated at certain extraction temperature, extraction time, phase separation time and single stage extractant oil volume ratio of 40 ℃,5 min,20 min,1.5 ,respectively. The result showed that the dimethyl suifoxide containing 10 volume fraction N, N-dimethyformamid (V(DMSO):V(DMF)=9:1) regarded as a mixed solvent could obtain better aromatics removal rate. Then the effects of process conditions on liquid-liquid extraction aromatic were explored based on DMSO-DMF using single-factor tests and response surface methodology. The optimized process conditions were found as: extraction temperature of 44.48 ℃,extraction time of 5.30 min, single stage extractant oil volume ratio of 1.69 and phase separation time of 10 min. After five stages counter-current extraction under above process conditions, the aromatics removal rate is 89.51±0.03% and the yield of solvent oil is（73.33±0.03）%。

Abstract:HEDP was synthesized in medium-test (50L) by one-step reaction with industrial grade acetyl chloride, phosphorous acid and n-butyl alcohol. Then, a low phosphorus water treatment agent HDW-2 was obtained by combining HEDP with zinc sulfate, sodium molybdate, sodium gluconate. On the basis of its scale and corrosion inhibition properties, a linear relationship model between HDW-2 dosage and scale and corrosion inhibitor rate was set, and trial on site for a period of one month in some enterprises in shandong province. The results showed that the scale inhibiting rate was up to 96.3% when the dosage of HEDP was 15 mg/L(equal to 2.02 mg/L PO43-) and the corrosion inhibiting rate was 95.2%, the corrosion rate was only 0.028 mm/a when the dosage of HEDP was 64 mg/L(equal to 8.49 mg/L PO43-). Adsorption law of HDW-2 followed the Langmuir isotherm adsorption model, based on it the dosing models (for anti-scaling) and (for anti-corrosion) were set. After a month of field test application, it showed that the system run stability, pH was maintained between 8.07-8.57, electrical conductivity was maintained between 1950-2690 μs/cm, calcium hardness total alkalinity was maintained between 892-1080 mg/L, chloride ion was maintained between 183-287 mg/L, total Fe was maintained between 0.12-0.32 mg/L, the corrosion rate <0.04 mm/a, total phosphorus (PO43-) was maintained between 3.37-7.55 mg/L. The water quality indicators had reached the requirement of party a's assessment indicators, thus the water treatment reagents HDW-2 has a certain market prospect and value for industrial application.

Abstract:Using semi-continuous seed polymerization method, a novel acrylate latex water repellent modified with organic silicon was prepared with multi-vinyl silicone oil (Si(Tri)),3-[tris(trimethylsilyloxy)silyl]propyl methacrylate (TRIS), methyl methacrylate (MMA), butyl acrylate (BA) and acrylic acid (AA) as monomers, cationic octadecyl polyether acrylate trimethylammonium chloride (OATAC) and nonionic isomeric tridecanol polyoxyethylene ether (DNS500) compound as emulsifier, 2,2'-azobis (2-methylpropionamidine) dihydrochloride (AIBA) as initiator and glycidyl methacrylate(GMA) as cross-link agent. The influence of mass ratio of Si(Tri) and TRIS，dosage of GMA and organic silicon monomer on the performance of latex ,water contact angle, water absorption of latex film, and water repellency performance of cotton fabric finished by these latexes were investigated. The results showed that this latex particles displayed core/shell morphology obviously, when the dosage of organic silicon monomer was 30%, mass ratio of Si(Tri) and TRIS was 25/75, and dosage of GMA was 2%, the water contact angle was 115.75°，water absorption was 3.23%(12h), and the cotton fabric finished by this latex exhibited excellent water repellent property with 90 points.

Abstract:A novel wet strength agent PAEP was prepared through chemical modification of polyamide-polyamine epichlorohydrin (PAE) resin with polyvinyl alcohol (PVA). PAEP/organoboron composite wet strength agent was also introduced in the papermaking process to increase the crosslinking among fibers. The corresponding structure and properties were characterized by IR, SEM, Zeta potential analysis and TG. The adsorption behavior of PAEP in fiber was investigated, as well as the effects of PAE, PAEP and PAEP-organoboron dosage on the wet strength of paper. It was found that the adsorption amount of PAEP in fiber increased from 2.3 mg/g to 8.1 mg/g with the increase of PAEP dosage from 2.5 mg/g to 30 mg/g, whereas the adsorption efficiency decreased from 81.8% to 21.12%. In comparison with PAE, the thermal degradation residue of papers treated with PAEP and PAEP-organoboron increased by 122.67% and 269.60%, respectively. The dry, wet tensile index increased by 22.5% and 101.41% when the organoboron content in PAEP-organoboron was 50%. And the retention rate of tensile index increased by 69.20%. Compared with cationic polyacrylamide (CPAM) and cationic starch, the PAEP-organoboron wet strength agent was also endowed with better strengthening efficiency.

Abstract:4 kinds of oil soluble transition metal catalysts were prepared， and the experiment was carried out to upgrade and reduce the viscosity of heavy oil， and the optimal catalyst and the best reaction conditions were selected. The results showed that ，in the condition that consumption of petroleum acid iron for 0.12%， the upgrading temperature 365℃， reaction time 40min， the viscosity of Lukeqin heavy oil fell to 125mPa?s from 17460mPa?s， the viscosity reduction rate of 99.28% . Compared with unupgraded heavy oil，the content of saturates of the upgraded oil increased by 17.61%，the content of resins decreased by 18.55%，the light fraction below 350℃ and 500℃ increased 9.82% and 29.45%, respectively. Increasing of light components of the upgraded oil is easy for pipeline transportation of heavy oil， and reduces the energy consumption.

Abstract:In view of the negative effect of the clay in the concrete, two kinds of low molecular weight clay-retraining reagents, PAAS and AA-AM, were synthesized through the mechanism of free radical copolymerization, ammonium persulfate as initiator, isopropyl alcohol as chain transfer. The polymers were analyzed by fourier infrared spectroscopy (FTIR), thermogravimetric (TGA) and gel permeation chromatography (GPC). Meanwhile the polymers were characterized by the cement paste fluidity, concrete slump and expansion. The results showed that the two kinds of polymers had a certain performance on inhibiting clay which could reduce the cement paste fluidity, concrete slump and expansion losing. The concrete slump increased from 180mm to 210mm and the concrete expansion advanced from 310mm to 430mm while adding the polymer AA-AM.

Abstract:Polyether ploysiloxane(EPEPS) was synthesized by ployethylene glycol diglycidyl ether and polydimethylsiloxane using TBAB and NaOH as catalyst, acetone and n-hexane as solvent. Then, quaternary ammonium organic silicon gemini surfactants (m-psi-m) were synthesized by quaternarization of EPEPS with N,N-dimethyl long chain alkyl amine in the presence of anhydrous ethanol and HCl aqueous solution. The structure of m-psi-m was analyzed using IR and 1HNMR. The influences of hydrophobic chain length of m-psi-m on their surface activity, critical micelle concentration, wetting ability and emulsifying stability were investigated in detail. Experimental results show that with increasing of hydrophobic chain length, surface activity and wetting performance of m-psi-m decreased, critical micelle concentration and emulsifying stability increased.

Abstract:Preparating the ivermectin(IVM) poly-lactic acid(PLA) microspheres by emulsified solvent evaporation method, and the research prepared the injection of the microspheres and established its quality control standards. Applying Central Composite to optimizing three factors which affect microspheres preparation including stirring speed, mass ratio of IVM:PLA and polyvinyl alcohol(PVA) concentration. The research used the orthogonal experiment to optimizing the suspension system, prepared the IVM microspheres injection and evaluated its quality control standards. The results suggests that the optimal microspheres preparation condition is 651r/min of stirring speed, 7:16 of the mass ratio and 1.47% of PVA, and under this condition the drug loading rate is 29.4%. The optimal suspension system is that the particle diameter is 80μm, and the contents of the microspheres, Tween 20 and sodium carboxymethyl cellulose are 2.5%, 1.5% and 1% respectively. The sedimentation volume ratio of the injection is 91.5%. Being evaluated the injection average pH is 7.2, and the effective component stably releases in 20 days in vitro which achieves sustained releasing effect. The preparation process lays the foundation the development of ivermectin sustained-release microsphere for injection and its safety application of the clinical usage.

Abstract:Al-based solid acids supported on montmorillonite (SO42-/Al-O-MMT) were prepared by impregnation method. The catalytic performance of esterification reactions towards acetic acid with n-butanol and citric acid with n-butanol were investigated. The as-prepared catalysts were characterized by XRD, IR, TG-DSC, SEM, BET and Py-FTIR. The synthesis conditions and reaction parameters of esterification reactions were optimized in details as well. The experimental results showed that the catalytic activity of Al-based solid acids supported on montmorillonite has been greatly improved. TheSO42-/Al-O-MMTsolid acid catalyst showed optimal catalytic activities with 99.7% conversion of acetic acid and 96.1% conversion of citric acid when the calcination temperature was 400 °C and the impregnation concentration was 0.75 mol/L. Moreover, the SO42-/Al-O-MMTsolid acid catalyst maintained its high activity with above 89.0% conversion of acetic acid and 84.6% conversion of citric acid after being used for six times, which indicated that the SO42-/Al-O-MMTsolid acid catalyst showed great stability.

Abstract:In order to reduce the amount of ionic liquids, used silica to designed and synthesized supported ionic liquids which was synthesized from morpholin. The silica-ILs catalyst was characterized by FT-IR spectroscopy, thermogravimetric analysis and N2 adsorption-desorption. And the catalytic performance of the catalyst was measured for esterification reaction. The results showed: n(cis-butenedioic anhydride):n(ethanol)=1:3.5, the mass of catalyst [Silica-Ps-Mor]HSO4 is 5% of the quality of cis-butenedioic anhydride, water carrying agentreaction is 30 mL, temperature is 90 ℃, reaction time is 4 h, the yield of diethyl maleate was up to 94.5%. The supported catalyst could be easily separated from the reaction system and reused at least eight times without loss of catalytic activity.

Abstract:Oxidation of β-Caryophyllene in heavy turpentine to β-caryophyllene epoxide in presence of mass fraction 30 % H2O2 aqueous solution by using peroxyphosphotungstomolybdate cetylpyridinium (Cat-PMo2W2O24 ) as catalyst was firstly reported. The product was structurally identified by means of GC/MS, IR, 1H NMR, and 13C NMR. The reaction parameters such as reaction temperature, solvent type, amounts of catalyst, material ratio, and reaction time, had obvious effect on the phase state of the reaction system, the conversion of β-caryophyllene and the selectivity of β-caryophyllene epoxide. An environment-friendly liquid-liquid-solid phase transfer catalytic system was constructed by using ethyl acetate as solvent in which the catalyst could easily be recycled. Under optimum conditions( based on the heavy turpentine mass of 2.80g,the catalyst dosage of 1.07%,the solvent volume of 5mL,n(H2O2 ): n(β-caryophyllene) = 1.78,the reaction temperature of 35℃,the reaction time of 2.5h), the conversion of β-caryophyllene and the selectivity of β-caryophyllene epoxide were up to 98.1% and 98.4% respectively, but the conversion of longifolence has hardly been found. After reaction, the reaction mixture was cooled to remove aqueous phase by phase separation and collect the catalyst by only a simple filtration, and then longifolence and β-caryophyllene epoxide are separated from the filtration by vacuum fractionation with purity(GC) greater than 90% and 95%, respectively.

Abstract:2-ethylhexnoic acid was prepared by catalytic oxidation of 2-ethylhexanol using O2 as an oxidant under base-free condition. Quantitative analysis was performed by gas chromatography (GC), and the qualitative analysis was carried out by GC-MS. The effects of catalyst, solvent, reaction temperature, time and oxygen pressure on the reaction were investigated. The results showed that TEMPO/Cu(NO3)2?3H2O was the efficient catalyst system, and ethyl acetate was the suitable solvent. Under the optimum conditions , the yield of 2-ethylhexnoic acid could reach 77.1%, when TEMPO was 5% mole of 2-ethylhexanol, Cu(NO3)2?3H2O was 4% mole of 2-ethylhexanol, and reaction at 0.5MPa O2, 100℃ for 6h. Under the constant oxygen pressure, the reaction is a pseudo first order reaction and the activation energy is 59.9kJ/mol. The main by-products are 3-heptanol and 3-heptanone.

Abstract:Single factor experiment was applied to invest the effects of ratio of raw materials, extraction time, temperature, motor voltage and times on extraction yield of fenugreek polysaccharides(FPS) by using the flash extract technology. Preliminary extraction conditions were obtained. Box-Behnken design and response surface methodology were used to optimize the ultimate extraction conditions. Cigarette physical and sensory humectant properties of FPS were tested. The results indicated that the optimum conditions were as follows: the ratio of liquid to raw materialswas 27:1(mL/g), the extraction time was 136 s, the extraction temperature was 58 ℃, and the motor voltage was 140 V. Yield of FPS was 21.23% under the optimal extraction conditions and the relative error was 2.61% compared with the theoretical value (21.80%), which showed that method for FPS was feasible. Cut tobacco moisture ability with FPS was stronger than with the samples of propylene glycol under the environment of low relative humidity. FPS had moisture-proof effect at a moderately high humidity. FPS could improve the quality of cigarette smoking, and adding 0.005%～0.1% of cut tobacco weight, FPS showed the most appropriate flavoring effect.