Abstract:A zwitterionic Gemini surfactant (GS-S) with sulfate group on the spacer group was prepared from dodecyl dimethyl tertiary amine, 1,3-dichloro-2-propanol and chlorosulfonic acid. The structure of the product was confirmed by infrared spectroscopy and nuclear magnetic resonance hydrogen spectroscopy. And the surface tension, wettability, oil-water interfacial tension, salt tolerance, foamability and emulsification were tested. The results showed that compared with cationic Gemini surfactant (GS-O) with similar structure, GS-S had higher surface activity, good emulsifying ability and foaming performance. The critical micelle concentration (CMC) value of GS-S was only 2.3×10-4 mol/L, and the critical surface tension (γCMC) value was 28.43 mN/m. GS-S could reduce the oil-water interfacial tension to low interfacial tension (1.11×10-2 mN/m). Moreover, GS-S could change the wetting state of water on the paraffin film, the contact angle was reduced from 110° (contact angle of deionized water on paraffin film) to 65°. It exhibited excellent salt resistance (＜35 g/L).

Abstract:As a kind of natural polymer soft material with three-dimensional network structure, gelatin-based hydrogels have attracted a lot of attention due to their good biocompatibility, biodegradability and biological safety, and high water content, similar structure and performance to extracellular matrix. Firstly, the structure and properties of gelatin-based hydrogels are summarized. Then, gelatin-based hydrogels are classified according to their functionality. The characteristics, properties and research progress of self-healing, antibacterial, stimulation-responsive, conductive and antifreezing gelatin-based hydrogels are described. Finally, the problems and challenges of gelatin-based hydrogels are discussed, and the possible development trend of gelatin-based hydrogels in the future is prospected.

Abstract:2,5-Furandicarboxylic acid (FDCA) is one of the perfect substitute candidates for terephthalic acid (PTA), an important chemical from the non-renewable fossil resource, due to the same functional groups and similar aromaticity between them. Biomass-based 5-hydroxymethylfurfural (HMF) is the preferred feedstock for the production of FDCA, herein, the selective oxidation of HMF to prepare FDCA through the oxidation reaction by oxidant directly, and catalytic oxidation by precious metal catalyst, non-precious metal catalyst, electrocatalytic and enzymic processes in the recent ten years have been reviewed systematically. In the meantime, the catalytic systems for the selective conversion of sugars into FDCA through catalytic dehydration and oxidation steps have also been summarized with their economic feasibility. Catalysts play the key role in the selective oxidation of HMF into FDCA with high efficiency; several suggestions have been given for the design of catalysts, and it will be helpful for the industrial application of FDCA in the future.

Abstract:Chemical gas sensors are significant in effective and real-time monitoring of harmful acidic gas. However, there are still some problems in sensitivity, selectivity and stability of traditional materials. Metal organic frameworks (MOFs) are a kind of organic-inorganic hybrid materials with porous structure, which have become a hotspot in the research of new functional materials due to their rich porosity structure, adjustable pore structure and large specific surface area. The excellent characteristics of MOFs provide a good idea and direction to solve the above problems. The selectivity and sensitivity of chemical gas sensors can be improved by introducing MOFs or various nanomaterials derived from MOFs on the sensing layer. The sensing performances of chemical gas sensors based on MOFs in recent years are reviewed, and its future development is prospected.

Abstract:In recent years, layered double hydroxide (LDH) has attracted much attention in the field of water treatment because of its special layered structure and highly controllable performance. In addition to being used for heavy metal adsorption, LDH also shows unique advantages in the adsorption of dyes. However, due to the shortcomings of single LDH, such as poor acid-base resistance, less surface functional groups, poor chemical stability, which restrict its application in dye wastewater treatment. To this end, more and more researchers through the modification of LDH to improve the adsorption properties of materials. In this paper, the preparation and modification methods of LDH materials are summarized, and their advantages and disadvantages are compared. Secondly, the removal effect and adsorption mechanism of ion in dye wastewater by modified LDH materials are introduced, at the same time, the influence of different environmental conditions (pH, contact time, amount of adsorbent, etc.) on the adsorption performance is analyzed. Finally, the application status of modified LDH materials is summarized, and its future development is prospected.

Abstract:Precision fertilization is the key direction of agricultural green development. Slow/controlled release fertilizer provides nutrition for plants at a pace that is compatible with their needs, to minimize nutrient loss and environmental risk. Solventless polyurethane coating material is an important branch in the current research of slow/controlled release fertilizer. In order to better grasp the research status and development trend, the progress in these aspects, such as synthesis technologies, product types and modification methods is analyzed, compared and summarized from the point of view of material synthesis. The analysis results show that different kinds of biomass raw materials have been applied in the synthesis of coating, which enrich the source and variety of coatings. Filling, interpenetrating polymer network and organosilicon are effective modification methods for coating materials. It is pointed out that simple and efficient modification method with low cost, clear controlled release mechanism and performance control, green and environmental protection, functional and industrialization of membrane materials are the main trends of solventless polyurethane envelop research in the future.

Abstract:Carbon nanotube (CNT) has unique hollow tubular structure, high surface area, easy modification and other excellent properties. Using them to modify polyurethane (PU) can significantly improve the electrical conductivity, thermal conductivity and electromagnetic shielding properties of PU materials. However, the surface of CNT itself is inert and prone to agglomeration, making it difficult to disperse evenly and stably in PU substrate. Therefore, in recent years, in addition to the study of the chain structure of polyurethane itself, researchers have made continuous attempts in the modification of CNT and achieved relevant results. In this paper, the functional group modification of CNT was emphasized, and the applicability and possible shortcomings of each modification method were discussed. It was pointed out that the dispersion of CNT in PU and its interfacial compatibility with PU substrate were still the key to improve the properties of the composite.

Abstract:With the development of economic level and the improvement of people living quality, sunscreen products have become an indispensable part of people's daily life. And the crystallization of sunscreen products as the main phenomenon of instability has attracted great attention. At present, the researches on the crystallization of sun-screening agent in emulsion mainly focus on how to develop new coating carrier technology or optimize the formulations to avoid the occurrence of crystallization, but the research on the crystallization mechanism of sun-screening agent in emulsion is scarce. From the perspective of crystallography, this paper mainly analyzes the crystallization process and inhibition mechanism of sun-screening agent in emulsion, forecasts the development and research trend of sunscreen products. Using the inhibition mechanism of crystallization to improve the stability and efficacy of sunscreen products has important scientific significance.

Abstract:The organic small molecules like basic amino acids (BAA) arginine, lysine and histidine have been extensively used in the food protein modification for the improved functional properties. The introduction to the structures of BAA and their physicochemical characteristics, the inherent structures food protein and the exerting functional roles in the food systems as well, has been fully reviewed. In particular, the impact of BAA on the modifications of structures and functionalities (hydration, emulsifying and gelling properties) of a variety of protein sources in the common food systems and the potential mode of action(s) of BAA modifying proteins involved in them also have been systematically illustrated. Moreover, it is stressed that the lack of research orientation, relevant novel techniques and prospects in the functional improvement of plant-derived proteins and other representative mass food proteins by employing BAA. This review is intended to provide a reference for the full understanding of the theory for BAA modifying proteins and extend the utilization of BAA in foods.

Abstract:Sucrose esters (SEs) are surfactants that are widely used in the food and cosmetic industries. In recent years, the application of SEs in the field of medicine is a huge breakthrough due to its good biodegradability, emulsification and solubilization effects, which brings a great interest to the researchers of all over the world. SEs can promote the dissolution, absorption and penetration of the drug, thereby improving drug efficiency and reducing its side effect. There is little review report on the application of sucrose esters in the field of drug delivery. In this paper, the main characteristics of SEs and the recent research progress in their applications in the field of biomedicine are reviewed, some applications of SEs in drug delivery and toxicology research are discussed and summarized. The future opportunities and challenges on the application of SEs in the field of medicine are prospected. The review will provide reference and theoretical support for the further study and clinical application of SEs.

Abstract:Solid nanoparticles instead of traditional surfactants as emulsifier-stabilized Pickering emulsions have the advantages of high coalescence resistance, environmental friendliness, and low cost, and have broad application prospects in various fields. The idea of accurately regulating the stability of emulsions through appropriate stimulation and the research on the construction of stimulus-responsive Pickering emulsions have attracted wide attention. This article reviews the construction and stability factors of multiple stimuli-responsive Pickering emulsions. Firstly, the influencing factors of Pickering emulsion and the surface modification technology of solid particle emulsifier are summarized. Then, the response mechanism and performance of various stimuli-responsive Pickering emulsion is introduced. Finally, the application of Pickering emulsion is reviewed. The problems, development and application of Pickering emulsion are analyzed and prospected.

Abstract:DMAEMA-MA as a new ionic liquid with unsaturated covalent bonds for both anion and cation was synthesized. Poly(2-acrylamide-2-methylpropane sulfonic acid-co-acrylamide) (IC-P(AMPS-co-AAM)) was prepared by polymerization of acrylamide (AAm) and 2-acrylamide-2-methylpropane sulfonic acid (AMPS) using DMAEMA-MA as the crosslinker. BIS-P(AMPS-co-AAm) was prepared by using N,N'-methylene bisacrylamide (BIS) as a non-ionic crosslinker, and the performance of BIS-P(AMPS-co-AAM) and IC (AMPS-co-AAM) was compared. Similar pore structure was observed by SEM. When the addition of DMAEMA-MA was 1.6%, the swelling rate in water could reach 235.97% and the conductivity reached 58.8 μS/cm. TGA shows that DMAEMA-MA can improve the thermal stability of IC-P(AMPS-co-AAM). The derusting performance of IC-P(AMPS-co-AAM) with different DMAEMA-MA content and BIS-P(AMPS-co-AAM) was investigated. The results showed that the derusting effect of Q235 low carbon steel with rust grade C could reach Grade A when DMAEMA-MA content was 1.6 wt%.

Abstract:Li4Ti5O12/C anode material for lithium-ion batteries were prepared by two-step calcination and sol-gel method using tetrabutyl titanate, lithium acetate, citric acid and bamboo charcoal as starting materials. The microstructure and morphology of the materials were characterized by XRD and SEM. The electrochemical properties of the materials were studied by constant current charge discharge, AC impedance and cyclic voltammetry . The electrochemical properties of the materials were investigated by constant current charge-discharge test, AC impedance and cyclic voltammetry. The results show that the Li4Ti5O12/C has good crystallinity, smooth particle surface and uniform dispersion, and the particle size is 200~300 nm. The first discharge specific capacity of Li4Ti5O12/C is 180.4 mA•h/g at 10 C, and 167.5 mA•h/g after 300 cycles. The capacity retention is 92.8%, which is much higher than 46.9% of Li4Ti5O12. At a high rate of 20 C, the capacity retention of Li4Ti5O12/C and Li4Ti5O12 were 68.9% and 41.3%, respectively.

Abstract:Fluorescent carbon quantum dots (CQDs) were prepared from chitosan by one-step hydrothermal method. The effects of reaction conditions such as mass concentration of chitosan, temperature and time on surface functional group and yield were investigated. The morphology, structure and properties of samples were characterized by TEM, FTIR, XRD, UV-Vis and PL spectra. The application in the field of anti-counterfeiting was explored. The results showed that the prepared CQDs had complete structure and high yield under the conditions of mass concentration of chitosan of 10 g/L, temperature of 180 ℃, and time of 12 h. The spherical CQDs nanoparticles had a diameter of about 36.2 nm, accompanied by hydroxyl and amino functional groups on the surface. In addition, CQDs exhibited strong absorption peaks at 293 and 330 nm, which show a blue fluorescence. The fluorescence quantum yield was about 39.8%. After they were made into ink for ink-jet printing, the encrypted pattern could be "visible" and "hidden" effectively under natural light and UV light, indicating the ink prepared from CQDs has excellent anti-counterfeiting effect.

Abstract:Use chlorinated 1-carbamoylmethyl-3-vinyl imidazole ionic liquid [CmVIM]Cl and tetrabutylammonium chloride (TBAC) as solvents to dissolve microcrystalline cellulose (MCC) and add different flame retardants melamine phosphate (MP), ammonium polyphosphate (APP) and nano-silica (SiO2) are used to prepare flame retardant fiber composite materials. The dissolution process of MCC was observed by polarizing microscope, and the structure, crystallinity, thermal stability and morphology change of regenerated MCC were characterized by FT-IR, XRD, TGA and SEM.The flame retardancy was tested by vertical combustion test, limiting oxygen index (LOI) and thermogravimetric analysis. The results showed that the dissolution temperature was 90 ℃, the content of TBAC was 8%, the dissolution rate of MCC was up to 6.3%, and the degree of polymerization was reduced to 505 when the solution was 25 min. MCC fractional crystallization structure into the amorphous structure, the crystallinity decreased from 74.0% to 46.4%; The thermal decomposition temperature decreased from 310 ℃ to 262 ℃, and the maximum weight loss rate decreased from 2.6%/min to 1.4%/min.The MCC surface changed from smooth and flat rod structure to uneven irregular structure. When m(MP)：m(APP)：m(SiO2)=1∶2∶2, the limiting oxygen index (LOI) of the flame retardant fiber composite increases to 33.5%, and the vertical combustion level is V-0.

Abstract:A long-chain alkoxyphenylhydrazone derivatives R has been synthesized and characterized through 1H NMR, 13C NMR, FT-IR and HR-MS. In UV-Vis and naked eye recognition experiments, the receptor R exhibited obvious spectral and color changes in response to F-, Ac- and H2PO4- in DMSO solution. Moreover, receptor R showed selectively single recognize F- in 5%H2O 95%DMSO solution. According to the Benesi-Hidebrand equation and Job curve, the complex constants of the receptor R with anions were above 3.07 ? 103 L/mol, and form a 1 : 1 hydrogen bond complex with F-. Finally, the mechanism of anion recognition process was explained through 1H NMR titration and theoretical calculation.

Abstract:In order to obtain a cotton fabric with good conductivity, an electroless nickel-plated conductive cotton fabric is prepared by the nickel sulfate ultrasonic activation method. The chemical composition and surface morphology of the coating were characterized by EDS and SEM, and the surface square resistance, weight gain, friction resistance and tensile strength of the cotton fabric after nickel plating were tested and analyzed. The effects of temperature, pH, NiSO4·6H2O concentration and NaH2PO2·H2O concentration on the weight gain and surface square resistance of cotton fabric were discussed. The results show that: after m(NiSO4·6H2O): m(NaH2PO2·H2O): m(H2O)=1.5:2:30, temperature 60 ℃, frequency 40 KHz and power 320W, ultrasonic activation for 30 min under the conditions of NiSO4·6H2O concentration 25 g/L, NaH2PO2·H2O concentration 20~25 g/L, Na3C6H5O7·2H2O concentration 5 g/L, C2H3NaO2 concentration 5 g/L, temperature 90 ℃, pH 5~6, reaction time 1h. At this time, the surface resistance of the nickel-plated conductive cotton fabric is the smallest, preferably 71.67 mΩ/□, and has good abrasion resistance. Good electrical conductivity and abrasion resistance make it better applied to smart textiles.

Abstract:Adsorption and desorption of anthocyanin from Rubia sylvatica Nakai fruit by six macroporous resins, the optimal extraction conditions of anthocyanin, and the stability of purified extract were studied. The purification results showed that, LX-8 resin was the best resin, the adsorption equilibrium time was 3 h. The optimal extraction conditions were as follows: Sample loading solution and desorption solution pH value 2.0, desorption ethanol volume fraction 70%, adsorption velocity and desorption velocity 0.5 mL/min, dosage of desorption agent 60 mL. After purification, the color value and the purity of the anthocyanin extract were 77.53 and 37.99 %, respectively. The stability study results showed that，anthocyanin from R.sylvatica fruit were stable in acidic, low temperature and dark environment, the addition of Al3+ , Mg2+ , Na+ and K+ had no adverse effect on its stability, Ca2+ , Fe2+ and reductant-oxidant have destructive effect on the anthocyanin, preservative had no effect on its stability. The stability of anthocyanin was affected by the addition of sugar and acid agents under heating conditions.

Abstract:Anthocyanins wasrecovered by two-step method using DESs to extract, macroporous resin to separate, and mulberry pomace as raw materials. The effect of different types of DESs and extraction methods on the extraction efficiency of anthocyanins was tested by extraction experiments. The anthocyanins were recovered, DESs was removed, and anthocyanins were recovered by using macroporous resin of different types as adsorption carrier. HPLC and HPLC-MS were used to quantify and characterize anthocyanins. As a result, oxalic acid-choline chloride stood out as the best DES for extraction, with an excellent yield efficiency of 97.49%, and macroporous resin X-5 was the best absorbent for the desolvation of NADESs, with a high recovery of 92.76%.

Abstract:Abstract: The star-shaped PLLA-SA copolymers with terminal carboxyl groups was synthesized successfully by the "core-first" method, and was dispersed into acetone to obtain PLLA-SA nano-dispersion. Then chitosan (CS) and dispersion were self-assembled via electrostatic action to form injectable CS/PLLA-SA complex hydrogel. The composition, structure and properties of PLLA-SA, PLLA-SA nano-dispersion and CS/PLLA-SA hydrogel were characterized by laser particle size and zeta potential analyzer, FTIR and SEM. The maximum zeta potential value of PLLA-SA was -21.89 mV. The average particle size of the PLLA-SA nano-dispersion was about 200 nm. Ibuprofen(IBU)-PLLA-SA nano-dispersion was prepared at PLLA-SA mass concentration of 5 g/L, the mass ratio between IBU and PLLA-SA of 1:2, stirring speed of 650 r/min for 1 h, then of 550 r/min for 5 h, and temperature of 15 ℃. When IBU-PLLA-SA nano-dispersion was mixed with 10 g/L chitosan hydrochloride (7 : 3 volume ratio), the hydrogel was reversible self-assembly formed，and the loading efficiency and loading content of the hydrogel can reach 85.38% and 28.46%, respectively. The in vitro study of drug release indicated that the injectable CS/PLLA-SA complex hydrogel exhibited a significant sustained-release capability for IBU, and the cumulative release rate of IBU could reach 95.81% within 30 h.

Abstract:The radical scavenging activity of the natural lycopene and hops active ingredients (hops extract, α-acids, β-acids and hexahydro β-acids) were evaluated using 1,1-diphenyl-2-picrylhydrazyl (DPPH•). And the synergistic antioxidant properties of the complex solutions by lycopene with hops extract, α-acids, β-acids and hexahydro β-acids were determined and the single solution above mentioned were used for a comparison, respectively, as well as the stability under different temperatures and ultraviolet light. The results showed that the lycopene has the strongest antioxidant activity with the IC50 for DPPH• of 8.73 mg/L in single solution; when the concentration of lycopene is 4 mg/L, the synergistic effect with hops active ingredients were in order of lycopene/β-acids > lycopene/hops extract > lycopene/hexahydro β-acids > lycopene/α-acids. The stability of lycopene and hops active ingredients in all complex solutions were improved compared with the respective single solution. Among them, the stability of β-acids in the lycopene/β-acids compound system increases by 26.87% and 40.86% at 50 ℃ and 70 ℃, respectively, and lycopene increased by 11.27% and 19.07%, respectively. In addition, the stability of all complex solutions was maintained above 80% after 10 hours of ultraviolet irradiation. The research will be helpful to provide reference for exploring and developing natural-derived composite food additives.

Abstract:The chestnut shell was selected as the carbon source (CC) and KOH was used to activate the carbonization products. The morphology and performance of electrode materials (CC700-OH) were tested. It was found that CC700-OH has a layered structure with holes / sheets interspersed, with a specific capacitance of 540 F/g at 1 A/g. Capacitor can still maintain 98% of initial value after 6000 cycles. In a two-electrode system, CC700-OH// CC700-OH symmetrical capacitor was assembled and has a specific capacitance of 106 F/g at 1 A/g and the potential window width is 0 to 1.6 V. When the power density is 800 mW/g, the energy density is 37.3 to mW•h/g and when the power density is increased to 12000 mW/g, the energy density can still be maintained at 23 mW•h/g. The above research results show that it is feasible to prepare symmetrical supercapacitor electrode materials using chestnut shell as carbon source.

Abstract:The biological activity, mass transfer effect of the particles and the structural distribution and synergistic relationship of the internal flora are affected by the culture substrate and particle size of the granular sludge, thus determining the effluent quality.The aerobic granules were successfully treated in the SBR reactor for 185 days using the tomato paste processing wastewater as a substrate.The particles of four sizes were sieved for simultaneous batch experiments to examine the sludge characteristics and the decontamination efficiency of the tomato paste processing wastewater. The results showed that the particle of 0.45~1 mm is irregular in shape and the surface porosity is small; 1~1.6mm and 1.6~2 mm tend to be spherical and ellipsoidal, with a smooth surface and dense structure; Although there are more surface gullies and pores in the 2~8 mm, the stability of the system could be maintained well. The presence of pores may provide conditions for the transport of internal materials and the excretion of microbial metabolites within the particles. The average sedimentation rate and specific gravity are positively correlated with the granule size; the water content is negatively correlated with the particle size, which greatly reduced the production of excess sludge. Compared with the granular sludge of 1~1.6 mm, 1.6~2 mm, 0.45~1 mm and 2~8 mm, the latter two particles have better ability to degrade organic matter, and the removal rates of COD are 97.8% and 94.2%, respectively; 1.6~2mm has the best degradation effect on NH4 -N and PO43--P, with the removal rates of 92.7% and 99%, respectively. The removal effect of 0.45~1 mm granular sludge on PO43--P is 69%.

Abstract:The removal of COD in traditional Chinese medicine extraction wastewater was experimentally investigated at the scene using electro-biological technology. The COD removal rates under different hydraulic retention time (HRT) and different voltage were studied. Under the optimum operating conditions, the microbial diversity and structure of the biofilm near the anode and cathode plates were investigated by high-throughput 16S rRNA sequencing. The results indicated that under the dynamic conditions of HRT for 12, 24 and 36 h, the removal rates of COD in traditional Chinese medicine extraction wastewater were 70.78%±2.41%, 82.83%±1.76% and 92.62%±1.28% , respectively. Under the static conditions that the voltage was 0, 10 and 27 V, the COD removal rates of wastewater were 56.85%, 98.97% and 33.33% after 24 h processing, respectively. Bacterial species detected in these samples covered 29 phyla，54 classes，119 orders，219 families，413 genera. Taxonomic assignment analysis indicated that Proteobacteria, Bacteroidetes, Firmicutes, Chloroflexi, Epsilonbacteraeota near the anode and cathode plates at phylum level accounted for 94.6% and 99.4%, respectively. There were significant differences between the anode and cathode plates in microbial community structure at genus lever. Desulfobulbus, Lentimicrobiaceae, Sphaerotilus, Geobacter, Methyloversatilis, etc had relatively high relative abundances near the cathode plate, while its relative abundances in the anode plate were less than 1%. Zoogloea, Acinetobacter, Fusibacter, etc were relatively abundant near the anode plate. Analysis showed that the electro-biological coupling technology could effectively degrade traditional Chinese medicine extraction wastewater compared with only under the treatment process of microorganisms or electrochemistry. Zoogloea was the main different microorganism near the anode and cathode plates.

Abstract:The sewage sludge-derived biochar was prepared from sewage sludge and then modified by nitric acid to obtain acidified sewage sludge-derived biochar (SSB-AO). The effects of SSB-AO dosage, initial pH of solution, coexisting ions concentrations, adsorption time, initial concentration of U(Ⅵ) and adsorption temperature on the removal of U(Ⅵ) by SSB-AO were investigated. The removal mechanism was analyzed by SEM-EDS, FTIR and XPS. The results show that the adsorption of U(Ⅵ) by SSB-AO is in accordance with the quasi second-order kinetic model, which indicate that the adsorption is mainly chemical adsorption process. The isotherm adsorption process is according with Langmuir model. Under the conditions of 30 ℃, 0.01 mol/L NaNO3, adsorption time of 300 min，initial pH of 6, initial uranium concentrations of 10 to 100 mg/L and dosage of 0.6 g/L, the theoretical maximum adsorption capacity is 80.34 mg/g. The adsorption efficiency of SSB-AO is more than 88% after five adsorption desorption tests, which shows that SSB-AO has nice circulation ability. The mechanism of U(Ⅵ) removal by SSB-AO include inner surface complexation, electrostatic adsorption and ion exchange. This study shows that sewage sludge-derived biochar, after modification by nitric acid, can effectively improve U(Ⅵ) adsorption capacity, which provides a reference for U(Ⅵ) containing wastewater treatment.

Abstract:Phase change compound BPTCD-PEG was synthesized by esterification reaction between 3,3',4,4'-benzophenone tetracarboxylic anhydride and polyethylene glycol (Mw 2000). BPTCD-PEG had a photothermal response and it could form liquid crystal state during the phase change transition process. Under polarized optical microscope, the polymer showed a typical focal cone-shaped nematic liquid crystal texture. The thermal properties of BPTCD-PEG were characterized by differential scanning calorimeter (DSC). There was an obvious melting peak at 41.7 ℃ and a crystalline peak at 30.7 ℃, and the latent heat of phase transition was 80.42 J/g and 63.71 J/g, respectively, indicating that BPTCD-PEG had remarkable heat storage and temperature regulation performance. BPTCD-PEG was grafted onto cotton fabric to prepare cellulose liquid crystal composites with heat storage and temperature regulation properties. The surface morphology of the modified cotton fabrics was characterized and the thermal regulation properties were tested. In the temperature range of 30-40 ℃, the heating and cooling rate of the unmodified pure cotton and modified cotton with 80% BPTCD-PEG were recorded using infrared thermal imager. Compared with the unmodified pure cotton, both the heating rate and cooling rate of modified cotton fabrics with 80% BPTCD-PEG were significantly slower. The results indicated that during the heating process, BPTCD-PEG decreased the surface temperature of cotton fabrics and during the cooling process, BPTCD-PEG increased the surface temperature. It is proved that the cotton fabric treated by BPTCD-PEG has the property of heat storage and temperature regulation in this temperature range.

Abstract:In order to improve the dyeing and fixing properties of natural dye on cotton fibers, the mixture of polymaleic acid (PMA) and citric acid (CA) was used for crosslinking dyeing on cotton with natural dye lawsone. The structure of cotton fabrics before and after dyeing was analyzed by FTIR、SEM and XRD, the effect of ester crosslinking on the properties of cotton fabrics and the crosslinking dyeing mechanism with polycarboxylic acid were discussed. The results showed that the surface of the cotton fabric before and after dyeing was not much different, and there was no adhesion between the fibers;The surface of the direct dyeing cotton fiber did not change significantly, and only a small amount of the dyes were attached, more dyes were attached to the surface of the crosslinking dyeing cotton fibers resulting in increased roughness, and the esterification reaction mainly occurred in the amorphous region of the fiber after crosslinking dyeing. Compared with those of direct dyeing cotton fabrics, the dyeing depth(K/S) and the dyeing rate of the crosslinking dyeing cotton fabrics were increased by 88% and 38% respectively, the green light, yellow light and color saturation of the dyed product increased. The colour fastness to rubbing increased by about 1~2 levels, the colour fastness to washing increased by about 1~2 levels. The wrinkle recovery angle (WRA) was enhanced by about 60% and had a UPF value of 50+ after crosslinking dyeing, and it had excellent UV resistance.

Abstract:In this paper, cyanuric chloride is used as the matrix, and a long polyether chain and two imidazoline oleic acid structures are introduced, which not only ensure good corrosion inhibition performance, but also increase water solubility, then, a new inhibitor, 2, 4-dioleate imidazoline 6-methoxypeg-1,3, 5-triazine (IPT) was designed and synthesized that aggregate multiple effective corrosion inhibiting groups into a single structure. The corrosion inhibition performance of Q235 steel in 1mol/L hydrochloric acid was tested by means of weight loss, electrochemical technology, contact angle and AFM. All the results show that IPT has excellent corrosion inhibition effect on Q235 steel in 1mol/L HCl, and it can maintain a good corro-sion inhibition effect in the range of 30~70 ℃, and it is less affected by temperature, even can still ensure stable adsorption on the surface of Q235 steel at 70 ℃. The adsorption of IPT molecules on the surface of Q235 steel conforms to Langmuir isothermal adsorption. The adsorption process is a self-releasing heat process mainly based on chemical adsorption. The hydrophobic chains of the IPT inhibitor's gemini struc-ture are aligned to form a neat and dense hydrophobic barrier. The hydrophilic end helps increase the wa-ter solubility of IPT, optimizes the solubility of traditional imidazoline corrosion inhibitors, and can block H pairs in acidic solutions corrosion of metal surfaces has good application prospects.

Abstract:Modified bagasse retarder (MBR) was prepared by sodium chlorite pretreatment and acid hydrolysis of bagasse in the presence of a catalytic amount of phosphotungstic acid, and its functional groups were analyzed by FT-IR, the influence of hydration heat, XRD and SEM on cement hydration was analyzed, and the retarding effect was compared with that of sodium gluconate (SG) at 20 °C and 50 °C, respectively, MBR contains hydroxyl group, carboxyl group and phosphate group, which has good adaptability to cement, better retarding performance than SG and does not affect the later strength of concrete, which can delay the induction period and reduce the hydration rate in accelerating period.