Abstract:The separation of propylene/propane is a challenging and energy-intensive process because of the similar sizes and chemical properties of propylene and propane. As an energy-efficient technology in gas separation, pressure swing adsorption (PSA) process requires porous materials with selective adsorption properties. This article reviewed the research process of adsorbents for the separation of propyl-ene/propane and mainly introduced the molecular sieve, carbon molecular sieve and metal organic frame-works (MOFs). The main factors which will influence the behaviors of the adsorbents were elabo-rated and the advantages and disadvantages of several adsorbents were compared. The appropriate adsorbent should be selected according to the actual application scenario, the composition of the raw gas, the relative content of propylene and propane, and the actual working conditions of the adsorbent. Finally, the development of the adsorbent for propylene/propane separation and their application in practice are prospected.

Abstract:Geopolymers become a good material for heavy metal pollution treatment, which possess low cost, environmental protection, high compressive strength, acid resistance and high temperature resistance. First, the types of geopolymers, preparation methods, and alkaline activation mechanisms are introduced. Next, the interaction mechanism between geopolymers and heavy metals is described. Then, the important factors that affect the geopolymers on the treatment of heavy metal ions are introduced, such as geopolymers, heavy metal species and reaction conditions. Finally, the problems of geopolymers in the treatment of heavy metals are analyzed and development prospects are prospected, with a view to providing references for future in-depth research and practical applications.

Abstract:Metal-organic frameworks (MOFs) have shown superior performance in many fields such as gas storage, separation, and catalysis. However, the intrinsic defects and characteristics of MOFs lead to the difficulties in practical applications. Combining MOFs with other materials to produce a new type of material with certain flexibility has become an effective method. This article reviews the preparation and application of MOFs-based flexible composites, future discuss the advantages and disadvantages of different MOFs composites, and shows the support provided by flexible materials as a substrate for practical applications of MOFs. It is believed that more efforts need to be made on further developing of new MOFs composites to improve the possibility and diversity of its’ practical applications.

Abstract:Hollow mesoporous silica nanoparticles (HMSNs), integrating inner cavity and mesoporous structure, have large specific surface area, tunable pore sizes, low density and favorable permeability, thus providing great potential applications in many fields. The major preparation methods of HMSNs were summarized and compared with each other on the special advantages. The research progress on hard-core templating, liquid-interface assembly, interfacial reassembly and transformation for preparing HMSNs are introduced in detail. And, the application of HMSNs in the fields of biomedicine, catalysis and optics are also introduced and explained. Moreover, the challenges and further researches on preparation and application of HMSNs are summarized and prospected.

Abstract:Chromatography is one of the methods for separation and purification of biomolecules, and chromatography media has been widely concerned as a key part of the chromatography process. The pore structure of the chromatographic medium has a significant influence on its separation and purification efficiency. Therefore, it is very important to explore the pore structure of the chromatographic medium. This paper introduced several methods commonly used to determine the pore diameter structure of chromatographic media, such as mercury intrusion porosimetry, nitrogen adsorption, small angle X-ray scattering, transmission electron microscopy (TEM), scanning electron microscopy (SEM) and inverse size-exclusion chromatography (ISEC). The basic principle and common probe types of ISEC are described, the advantages and disadvantages in the application of ISEC are summarized, the development history of ISEC and its research advance are introduced in this paper.

Abstract:Diamond-like carbon (DLC) film, due to the excellent tribological properties and good biocompatibility, was used to improve the wear and corrosion resistance of artificial joints. This paper reviewed the research status of DLC films in the field of artificial joints, including the classification and deposition methods of DLC films. Although this coating material has been studied for decades, under the combined action of high-load friction and corrosion in the complex physiological and mechanical environment of the human body, high internal stress resulted in insufficient adhesion, which limited its application in the field of artificial joints. This paper introduced the method of reducing the internal stress of DLC film and improving the adhesion of film base and the biocompatibility of DLC film. Finally, the research progress of different DLC coated artificial joint friction pairs was described. According to this review, superior candidate material for articulating implants was a thick and adherent hydrogen-free DLC coating (high sp3%) on both sliding surfaces, which was essential for load-bearing implant applications. The problems of DL C film artificial joints need to be solved, which is conducive to improve the lifetime of DLC film.

Abstract:Environment responsive superabsorbent can produce rapid response in the face of external stimulation and make changes in physical structure and swelling performance, which is expected to be applied in artificial muscles, drug controlled release carriers, adsorption and separation, fine coal dehydration and other fields. With the development of science and technology, new requirements and applications for the structure and properties of environment responsive superabsorbent have been put forward. This review briefly introduces the research progress of environment responsive superabsorbent in recent years. The response mechanism, research level and application of four kinds of superabsorbents with different sensitive types (temperature, pH, salt and magnetic) are mainly introduced. Finally, The key scientific problems to be solved in the application-oriented research of environmental responsive superabsorbent are discussed. It is proposed that the preparation of superabsorbent with multiple response mechanisms and mechanical properties can accelerate the transition from basic laboratory research to practical industrial application.

Abstract:Fe3O4/ABc composite was prepared by using chemical precipitation, the physical and chemical properties of biochar were analyzed by XRD、SEM、FT-IR and VSM. Batch experiments were carried out to investigate the effects of solution pH , adsorbent dosage on sorption efficiency and the adsorption kinetics, isothems were investigated. The results showed that Fe3O4@ABc composite with paramagnetic property was prepared successfully by compositing Fe3O4 with sludge biochar(ABc), and it could be utilized easily under external magnetic field. The specific surface area and average pore size of Fe3O4@ABc is 622.88 m2?g-1 and 1.56 nm, and removal rate of methyl orange attained 96.14 %, when the concentration of methyl orange is 100mg ? L-1, the addition amount is 10 mg, the adsorption time is 240 min. The adsorption data fitted well with the pseudo-first order kinetic model and Freundlich isotherm model，which indicates that physical adsorption is the main adsorption mechanism and chemical adsorption is the auxiliary adsorption mechanism

Abstract:Ag@AgCl/CeO2 was prepared by soft template method assisted by microwave, sedimentation and photoreduction. The structure, morphology and composition of the prepared catalysts were investigated by XRD、SEM、EDS、TEM、N2-Adsorption desorption and UV-Vis DRS. Meanwhile, a photo-CWPO (Catalytic wet peroxide oxidation) system was established. The catalytic degradation of acrylonitrile wastewater by Ag@AgCl/CeO2 under UV-Vis irradiation was studied. The results showed that the Ag@AgCl/CeO2 prepared has ordered mesoporous structure, specific surface area was 422.8m2/g and the band gap was 2.9eV with strong absorption in visible light region. In the photo-CWPO system, when the concentration of acrylonitrile wastewater was 500mg / L, the dosage of catalyst was 200mg, the amount of H2O2 (30%) was 8ml, and the reaction time was 60min, COD removal rate can reach more than 90%, and it has high stability. The main role of the degradation process of acrylonitrile wastewater is the ?OH generated by the catalysis of Ag@AgCl/CeO2.

Abstract:The reduced graphene oxide nanosheets (RGONs)@Fe3O4 hybrid nanosheets were prepared by coprecipitation method from graphene oxide (GO) and FeSO4 and FeCl3. A novel RGONs@Fe3O4/waterborne polyurethane (WPU) superfine fiber synthetic leather was obtained by physical blending and doctor-blading method. RGONs@Fe3O4 hybrid nanosheets were characterized by Raman, XPS, XRD, SEM and TEM. The electrical and magnetic characteristics and electromagnetic shielding efficiency of RGONs@Fe3O4/WPU ultrafine fiber synthetic leather were investigated. And the shielding mechanism was discussed. The results showed that under the condition of n(GO) ∶n(Fen+)=1∶10,〔Fen+ is a mixture with n(Fe2+)∶n(Fe3+)=1∶1.75〕, Fe3O4 nanoparticles were deposited uniformly on the surface of RGONs sheets, the composite structure effectively reduced the π-π stacking effect between RGONs nanosheets. With the increase of the amount of RGONs@Fe3O4 hybrid nanosheets, the electromagnetic characteristics of RGONs@Fe3O4/WPU superfine fiber synthetic leather were obviously improved. When the RGONs@Fe3O4 dosage was 5% (based on the mass of WPU, the same below), the electromagnetic shielding coefficient (EMI SE) of RGONs@Fe3O4/WPU superfine synthetic leather in the frequency range of 8.2~12.4 GHz could reach 36 dB, which was about 40% higher than that of RGONs/WPU superfine synthetic leather. The surface effect and electrical and magnetic double loss characteristics of RGONs@Fe3O4 hybrid nanosheets are the key mechanisms to enhance the electromagnetic shielding performance of RGONs@Fe3O4/WPU superfine fiber synthetic leather. The surface effect and electrical and magnetic double loss characteristics of the hybrid nanoflakes of RGONs@Fe3O4 are the key to enhance the electromagnetic shielding performance of the composite leather.

Abstract:The high sensitivity and selectivity of rGO-SnO2 nanocomposites for NH3 at room temperature were prepared by precipitation-roasting method. X-ray diffraction (XRD), Fourier infrared Spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and specific surface area (BET) were used to characterize and analyze pure SnO2 with rGO (1.0%)-SnO2 nanocomposites. Compared with the pure SnO2, the crystal size of SnO2 in the rGO (1.0%)-SnO2 nanocomposites is smaller, about 6 ~ 20 nm, with a larger specific surface area of 33m2/g. The sensitivity of rGO (1.0%)-SnO2 nanocomposites to 0.01% NH3 reached 49.6%, which was 2.1 times of that of pure SnO2 at the same NH3 concentration, and the response and recovery time were 21 s and 204 s, respectively, which was 24 s and 10 s shorter than that of pure SnO2, with good repeatability, selectivity and stability. The excellent gas sensing properties of rGO (1.0%)-SnO2 nanocomposites can be attributed to the interaction of p-n heterojunction produced by rGO and SnO2 and dissolved NH3 ionized conductive ions.

Abstract:Dual-network high strength hydrogel excipients were prepared from agar, acrylamide, tannic acid (TA) and graphene oxide (GO). GO was reduced by TA and reacted with polyhexamethylene guanidinate (PHMG) in TA/rGO microreactor. It was immobilized in the hydrogel skeleton to prepare antimicrobial hydrogel excipients. The properties of the gels were tested by mechanical properties, thermodynamic properties and antibacterial properties. The results showed that the elongation at break of the gel increased by 60%, increase in compressive strength, the internal porosity of the gel was further reduced, and the mechanical properties were improved; When soaked in 2.0% PHMG aqueous solution, the antibacterial rate of E. coli and S. aureus reached above 99.80%; no bacteriostatic circle was formed, indicating that PHMG was immobilized in gel; Hemolysis of erythrocyte (RBC) showed that the gel hemolysis rate was lower than 5%, and the antibacterial hydrogel had good biocompatibility.

Abstract:Boron Dipyrromethene (BODIPY) was modified by introducing a 9-butyl-9H-carbazole component via a double bond, which shows a red emission band at 617 nm in CH2Cl2. Then 7-nitro-2,1,3-benzoxadiazole (NBD) moiety was conjugated to this fluorescent intermediate through a sulfhydryl-labile ether linkage in order to afford a nonfluorescent probe (BDP-NBD), which could be used for biothiols detection. Probe BDP-NBD shows very weak emission because of the Photoinduced Electron Transfer (PET). When the biothiols are added, the PET progress is stopped, thus BDP-NBD shows a significant signal response with 95-fold fluorescence enhancement. This “turn on” emission probe exhibits low detection limits for biothiols (6.51×10-8 mol／L for Hcy, 4.25×10-8 mol／L for Gsh, 4.28×10-8 mol／L for Cys). Furthermore, probe BDP-NBD also presents good anti-interference ability in the condition of other metal ions and amino acid.

Abstract:Based on ZnCo2O4 microspheres，g-C3N4/ZnCo2O4 composite were prepared by solution adsorption and insulation at 100 ℃ for 12 h. The materials were characterized by XRD, SEM, XPS and Uv-DRS. The heterostructure was formed between ZnCo2O4 and g-C3N4. The bandgap width of g-C3N4/ZnCo2O4 composite was 1.73 eV. Under the visible light irradiation, the photogenic electron (e‒) and the photogenic hole (h+) of ZnCo2O4 was effectively separated via capturing e‒ of ZnCo2O4 by the delocalized π bond of C3N4 in the heterojunction region. The photogenic h+ of ZnCo2O4 participate in reaction of the photocatalytic degradation tetracycline (C22H24N2O8, Initial concentration: 10 mg/L) in water, g-C3N4/ZnCo2O4 composite have better degradation properties for tetracycline, and the highest degradation rate is 90.02 %.

Abstract:To improve the anticorrosive performance of polysilsesquioxane coating, the hydroxyl-containing organic-bridged polysilsesquioxane anticorrosive coating was prepared through sol-gel and dip-coating technique, in which the sol was synthesized by acetic acid catalyzed polysilsesquioxane precursor GN. The polysilsesquioxane precursor GN was synthesized by 3-glycidoxypropyltrimethoxysilane (GPTMS) and N-[3-(trimethoxysilyl)propyl]ethylenediamine (NTMDA) through epoxy-amine ring-opening reaction. The anticorrosive performance of the coated Q235 steel specimens was investigated by polarization curve and electrochemical impedance spectroscopy. Furthermore, the effect of aging time on the anticorrosion performance of coatings was investigated. When the aging time was 4 h, its impedance at low frequency of 0.01 Hz increased by 1.5 orders of magnitude in contrast to the bare Q235 steel. In adhesion evaluation test, the coating performed level 1.

Abstract:A triphenylamine substituted Ir(Ⅲ) complex Ir-TPA was designed and synthesized by the modification of the cyclometalating ligand 2-phenylpyridine. Then Ir-TPA was employed as a luminescent probe for the detection of nitroaromatic compounds (NACs) include 4-nitrotoluene, 1,3-dinitrobenzene, 3-nitrobenzoic acid, and 3-nitrobenzyl alcohol. The Stern-Volmer equation was employed for the fitting of test data. The highest detection efficiency of Ir-TPA was demonstrated to 3-nitrobenzoic acid with KSV of 6.18?0.10 mM-1 and the detection limit down to 0.0112 mM. The detection mechanism of Ir-TPA to four NACs was assigned to the charge transfer which has been indicated by spectral analysis and density functional theory calculation. This study provides theoretical and technical support for the rapid and efficient detection of NACs.

Abstract:The nano-graphene oxide (GO) was dispersed into dimethyl sulfoxide by ultrasonic dispersion method, and then mixed with Cotton stalk bast microcrystalline cellulose (MCC) and 1-butyl-3-methylimidazolium chloride (BmimCl) salt solution, and vertically suspended. The alcohol gel spheres were prepared by a drop method, and Cotton stalk bast cellulose/graphene oxide (MCC-GO) aerogel spheres were prepared using a supercritical carbon dioxide drying method. Nano measurer software and SEM, TG, FT-IR equipment were used to characterize the morphology and structure of the material. The results showed that when MCC accounts for 3% of BmimCl mass, the cellulose alcohol gel ball has the best forming effect, and the average particle size is 2.78 mm. As GO mass fraction accounting for MCC increases, the average particle size of the alcohol gel ball did not change significantly, and the uniformity decreased. It decreased from 0.9985 to 0.8897; the average particle size of aerogel ball increased first and then decreased with the increase of GO mass fraction, and the uniformity of particle size decreased. The determination coefficient R2 decreased from 0.9915 to 0.6864, when the GO mass fraction was 6%. The average particle size of MCC-GO aerogel is 1.79 mm and the volume shrinkage is at least 57%. The addition of GO increases the pores inside the aerogel, changes the pore structure, and improves the heat and adsorption of MCC aerogel balls stability.

Abstract:2-(2-Methoxyethoxy) ethyl methacrylate (MEO2MA) and polyethylene glycol methyl ether methacrylate (OEGMA500) were used as monomers, the temperature-sensitive random copolymers P(MEO2MA-co-OEGMA500) were synthesized by free radical polymerization with horse radish peroxidase (HRP)/acetylacetone (ACAC)/H2O2 catalytic initiator system. The number-average molecular weight, molecular weight distribution, the structure and thermal properties of the synthesized polymers were characterized by GPC, 1HNMR, FTIR and DSC. The temperature-sensitive properties of the synthetic polymers were characterized by the determination of light transmission and particle size of polymer aqueous solution at different temperatures. Temperature-sensitive polymer with a feed molar ratio of n(MEO2MA):n(OEGMA500) of 100:0, 95:5, 93:7, 90:5, and 85:15 were synthesized. The results show that the LCST of the synthetic polymers increases from 24 ℃ to 39 ℃ and the glass-transition temperature of the synthetic polymers gradually decreases from -11.75 ℃ to -14.74 ℃ with the increase in the feed proportion of OEGMA500. The LCST decreases with increasing the concentration of polymer aqueous solution. With the increase of the temperature, the average particle size of the polymers increases and are 82.5~135.6 nm larger than that at low temperature.

Abstract:Epoxy-siloxane prepolymer was synthesized through hydrosilylation between 1,2-epoxy-9-decene and hydrogen-terminated polydimethylsiloxane in the presence of a catalytic amount of Karstedt's catalyst [platinum(0)-1,3-divinyl-1,1,3,3-tetramethyldisiloxane], then cured with cationic light initiator under ultraviolet light to obtain UV-curable epoxy-polysiloxane resin. The reaction conditions for the synthesis of the prepolymer were optimized. The structure of the synthesized prepolymer was characterized by FTIR and 1HNMR. The properties and morphology of the cured film were tested by thermogravimetic analysis (TGA), differential scanning calorimetry (DSC), contact angle, alkali resistance and alcohol resistance, gel rate, Shore A hardness, and fracture surface morphology. The results showed that under the conditions of reaction temperature 75 ℃, reaction time 8 h, dosage of catalyst's active ingredient 0.009‰ (based on the total mass of hydrogen-terminated polydimethylsiloxane and 1,2-epoxy-9-decene, the same below), the reaction degree was 93.95%. When the dosage of photoinitiator BL9380 was 3% (based on the mass of the epoxy-siloxane prepolymer, the same below), and the curing time was 20 s, the cured resin had the best comprehensive performance. The surface activity energy was 18.4~18.8 mN/m, the gel rate was 93.9%, and exhibited dood alkali resistance and alcohol resistance with Shore A hardness of 37. The cured resins exhibited good thermal stability with corresponding temperatures of maximum decomposition rate of 437.6 and 511.3 ℃ in air, and 13.9% of residual weight ratio at 780 ℃.

Abstract:In this study, the activity of imidazole ionic liquids is studied, and the influence of anion and cation function on this transesterification reaction is summarized. According to GC-MS analysis, the reaction mechanism is proposed. The transesterification efficiency is promoted by increasing the anion radius or shortening the alkyl substituent length of imidazole. The ionic liquid [Emim]IM prepared with imidazole ionic liquid and strong electron anion compound is used for the transesterification of ethylene carbonate (EC) with methanol to dimethyl carbonate (DMC). The catalytic activity is consistent with that of sodium methoxide due to the strong electronegative anion as well as weak interaction between cation and anion. The reaction equilibrium is realized in 1 min, together with 100% selectivity and 88.70% yield of DMC at 68 ℃ with only 0.3 % catalyst amount and EC∶MeOH = 1∶10. With gradually increasing the reaction temperature and MeOH content, the DMC yield raises. If the reaction was proceeded at 0 ℃, the as-synthesized catalyst still exhibited acceptable activity, which is in accordance with the results from the optimized [Mmim]I ionic liquid conducted. The 20 times re-use results without any inactivation indicated that [Emim]IM displayed excellent stability with 88%~90% DMC yield.

Abstract:Vetiver essential oil microcapsules were prepared using gelatin and chitosan as the shell material and vetiver essential oil as the core. Using the single factor and orthogonal experiments, we optimaized the best preparation process of microcapsules and charactered the vetiver essential oil microcapsules by SEM, particle size, potential and FTIR. The release of vetiver essential oil in microcapsules at pH 1.5 and 7.4 was measured, and the anti-inflammatory effect of microcapsules in vitro was studied by mouse RAW 246.7 cells. The results showed that the encapsulation rate reached 90.96% in the condition of the vetiver essential oil amount was 0.3g and the wall material amount was 1g (the mixing ratio of gelatin and chitosan was 30∶2). and, The surface of the microcapsules was continuous and spherical. The particle size of the microcapsules was 2.303 μm and the zeta potential was -10.7 mV. It had good stability and excellent packaging effect. The microcapsules showed a good release character at pH 7.4 with a cumulative release of 87.49% within 72h. Cell experiments showed that the microcapsules (60, 90, 120 μg/mL) were safe and non-toxic and effectively inhibited the interleukin-1β (IL-1β), Interleukin-6 (IL-6) and tumor necrosis factor alpha (TNF-α) secretion. The vetiver essential oil microcapsules are simple to prepare and stable in quality with good anti-inflammatory activity.

Abstract:In order to improve the stability of α-tocopherol (α-TOC) under natural environment and enhance its encapsulation rate and drug utilization, β-cyclodextrin derivative (β-CD-6-DA) modified by dopamine was used as host molecule to self-embed α-TOC, thereby obtaining stable inclusion complex (β-CD-6-DA/α-TOC). The encapsulation rate, molecular recognition behaviors and inclusion proportion of β-CD-6-DA on α-TOC were investigated using UV-vis, 2D-NOESY, and continuous variable Job’s methods, which exhibited up to 99.3±0.7% of encapsulation efficiency, promoted embedded depth of α-TOC inside hydrophobic cavity, and increased inclusion proportion from 2 : 1 to 1 : 1. Furthermore, the biological properties of β-CD-6-DA/α-TOC inclusion complex were discussed, revealing excellent cytocompatibility, controlled release at 35 ℃, and enhanced anti-oxidative scavenging capacity.

Abstract:In order to find novel pyrazine- and oxazole-based derivatives with potent antioxidant properties, three pyrazine-oxazole bi-heteroaryl compounds were obtained via FeCl3 promoted oxidative cross-dehydrogenative coupling reactions between pyrazine-N-oxides and 1,3-azoles. The structures of the compounds were confirmed by 1HNMR, 13CNMR and MS, and their antioxidant abilities were evaluated by inhibiting radicals induced oxidation of DNA and quenching radicals. The results showed that the three target compounds can effectively inhibit radicals induced oxidation of DNA and quench radicals, which indicated that they had strong radical scavenging properties and reduction ability and can be a potential antioxidant. The n values of the obtained compounds were 1.48, 1.78, and 1.88 in AAPH-induced oxidation of DNA. Moreover, the TBARS percentage of the target compounds in inhibiting HO? and GS? induced oxidation of DNA were 76.1% and 68.3%, 69.8% and 64.1%, 72.6% and 67.4%, respectively. Furthermore, the three compounds can scavenge ABTS ? and DPPH? radicals.

Abstract:In this research, The quaternary ammonium salt ionic liquid Tricaprylylmethylammonium ([A336]Cl) was used as the precursor, Functionalized ionic liquid [Tricaprylylmethylammonium][di-2-ethylhexylphosphinate]([A336][DEHP]) was synthesized by ions-exchange process. Its structure was characterized and analyzed by ATR and NMR. Using [A336][DEHP] as extractant, Trioctylphosphine oxide(TOPO) is a synergistic extractant. Extraction and separation of Nd(Ⅲ) in chloride medium using [A336][DEHP], [A336]Cl+TOPO, [A336][DEHP]+TOPO as an Extraction system. The results showed that [A336][DEHP]+TOPO extraction system had better synergistic extraction effect. The results indicated that extraction efficiency of Nd(Ⅲ) increased with the increase in pH, the concentration of salting-out agent NaCl; When the concentration of NaCl was 0.5 mol/L, the pH was 5.0 and the temperature was 25℃, the extraction effect of each extraction system was 85.6%, 78.6% and 96.5%, respectively. ΔH<0, the synergistic extraction appeared to be an exothermic reaction, lowering the temperature facilitates the extraction process; The extraction mechanism is ion association mechanism. Anion and ion do not exchange in the aqueous phase, is an environmentally friendly extraction system. When the mass fraction of HCl arrives at 5%, the loaded Nd(Ⅲ) in organic phase can be fully stripped. After five cycles, the extraction results were still good.

Abstract:Ethanediamine (EDA) and sodium hydroxide was applied to modification of polyester fabric which made the surface of polyester rich in amino groups. Then the modified polyester dipping with graphene oxide (GO), obtained conductive materials by reducing GO to reduced graphene oxide (RGO). The samples were characterized by SEM. The rubbing and washing fastness of the samples were also tested. The results showed that the absorption performance of polyester was increased obviously after modified with EDA. The optimal conductive finishing process was pH of GO 6, sodium hydrosulfite 5g/L, reducing at 95℃ for 60min. The conductivity of polyester fabric increased with the increasing of the concentration of GO, reducing temperature and time. When the GO concentration was 2g/L, the surface resistance value of the modified polyester decreased to 14.575 KΩ/cm. The SEM was showed that the surface of original polyester fabric is smooth, after dipping with GO, GO forms a thin film on the surface of the fabric.

Abstract:the use of cardanol polyoxyethylene ether (BGF-10) and acrylic acid (AA) as raw materials, through the direct esterification method, hydroquinone phenolic polymerization was synthesized under the catalysis of hydroquinone as a polymerization inhibitor and p-toluenesulfonic acid. The ether ester (BGFAA) was used to investigate the effect of reactant material ratio n(AA):n(BGF-10), reaction temperature, reaction time, amount of catalyst and amount of polymerization inhibitor on esterification rate. The response surface optimization method optimizes the esterification reaction conditions. The optimum conditions for the synthesis of BGFAA are as follows: reaction temperature 127 ° C, reaction time 5.2 h, n (AA): n (BGF-10) = 1.6:1, polymerization inhibitor dosage 0.6% (accounting for the total mass of the reactants) When the amount of catalyst is 5% (same as above), the esterification rate is as high as 93.23%, and the structure is confirmed by infrared spectroscopy and nuclear magnetic resonance. A new type of heavy oil demulsifier (BGFAA) n was prepared by initiating polymerization of self-made BGFAA and acrylic acid (AA) under the action of azobisisobutyronitrile. The dehydration rate and the oil absorbance of the dewatered wastewater were used as indicators to study the effect of Chen Zhuang. The demulsification dehydration performance of the oil w/o emulsion, when the demulsification temperature is 60 ° C, the demulsification time is 2.5 h, the demulsifier dosage is 500 mg/mL, the dehydration rate is as high as 86.8%, and the oil absorption absorbance of the dewatered sewage is 1.05, which showed that (BGFAA)n had the advantages of high dehydration rate, low oil content of dehydrated sewage and clear water quality.

Abstract:A novel unparalleled anti-permeable superhydrophobic coating was obtained by supplementing PLA/CH2Cl2 solution with silane coupling agent and hydrophobic silane nanoparticles that prepared by sol-gel reaction between hexadecyltrimethoxysilane and tetraethyl orthosilicate. The structure and morphology of the coating was characterized by FTIR and SEM. FTIR indicated silane coupling agent has not participated chemical reaction. SEM revealed that the superhydrophobic originated from the hierarchical structure morphology. The water contact angle measurement indicated the hydrophobic silane nanoparticles considerably improved the water-repellency and achieved superhydrophobicity：above 150o This superhydrophobic coating possessed the advantage of simple preparation, excellent resistance of water penetration as well as environmentally friendly. In the time-span range of 10min-20min, compared with the coating of hydrophobic silane nanoparticles (contact angle decreasing speed 150o/min) and pure coating of PLA/CH2Cl2 solution, (contact angle decreasing speed 9.5o/min) the hydrophobic silane nanoparticles/PLA solution coating has improved resistance of water penetration to a great extent, contact angle decreasing speed was merely 8o/min. The excellent anti-permeability towards water was achieved by incorporating the hierarchical structure of hydrophobic silane nanoparticles with the good film-forming property of PLA.

Abstract:Aromatic amines are used as raw materials. At room temperature, oxygen is used as an oxidant. Visible light promotes the synthesis of symmetric aromatic azo compounds. All aromatic azo products were characterized by 1H NMR and 13C NMR, and the best yield was up to 98%. The present method has some advantages such as mild conditions, high efficiency and cleanliness.

Abstract:Temperature change with time (T-t) and pressure change with time (P-t) during the oxidation of 1,3-butadiene were measured by mini closed pressure vessel test (MCPVT). The kinetics of initial oxidation of 1,3-butadiene was calculated by P-t plot. Results showed that 1, 3-butadiene not reaction was detected under nitrogen even when the temperature reached 388.15 K. The oxidation of 1,3-butadiene with oxygen occurred in the range of 343.15 K ~ 383.15 K, and the pressure in the reactor decreased. The kinetics of the initial oxidation of 1,3-butadiene with oxygen is a second-order reaction. In addition, the pseudo first-order oxidation kinetics of two special conditions of oxygen excessive and 1,3-butadiene excessive were studied. The thermodynamic parameters of the transition state are also discussed. The results showed that the thermal oxidation of 1, 3-butadiene was an orderly molecular number reduction process. The oxidation products were analyzed by gas chromatography-mass spectrometry and iodometry, the products were furan and peroxides.