19results about How to "Strong hydrogen bonding" patented technology

The invention discloses a composition containing microspheres and cross-linked hyaluronic acid or salt thereof as well as a preparation method and application of the composition. The composition comprises cross-linked hyaluronic acid or salt thereof, microspheres, a phosphate buffer solution and non-cross-linked hyaluronic acid or salt thereof. Mixed hyaluronic acid or salt thereof with high and low molecular weight is used under the condition of large amount of alkali solution to form a loose structure, hyaluronic acid or salt thereof with low molecular weight is used under the condition of small amount of alkali solution to form a compact network structure, and the two are mixed to continue cross-linking reaction to form a cross-linked structure. The preparation method comprises the following steps: firstly, forming gel with a soft elastic embedded structure with loose pores wrapping elastic hard spheres, then mixing the gel with the microspheres, and enabling the composition to have a soft elastic function and a rigid supporting performance due to entry of the rigid microspheres in the gel, so that the composition and the rigid microspheres have a synergistic effect; in addition, the gel can effectively protect the microspheres during moist heat sterilization, reduce degradation of the microspheres and prolong the effect of stimulating collagen regeneration by the microspheres, the gel is suitable for more skin levels and filling parts, and the use safety of the composition is improved.

The invention relates to the technical field of organic fertilizers, and discloses a preparation method of a water-retaining slow-release bio-organic fertilizer, which is characterized in that water-retaining material powder is prepared from nano silicon dioxide, gamma-methacryloxypropyltrimethoxysilane, acrylic acid, attapulgite and the like as raw materials. The preparation method comprises the following steps: blending furfural residues and pig manure biogas residues into a mixed matrix according to a certain proportion, adding a microbial decomposition bacterium agent, nitrogen-fixing bacteria, phosphate solubilizing bacteria and the like into the mixed matrix, fermenting, crushing, drying and sieving to obtain bio-organic fertilizer particles. The water-retaining slow-release bio-organic fertilizer is obtained by taking the bentonite as an inner core carrier, taking a bentonite slow-release material as an inner coating film and taking water-retaining material powder as an outer coating film through a rotary drum coating process, and the prepared bio-organic fertilizer has relatively good water-retaining performance and slow-release performance.

The invention provides a modified diaphragm, a preparation method and a lithium metal battery in order to solve the problems of uncontrollable dendritic crystal growth and serious interface side reaction of a lithium metal negative electrode in the prior art. The modified diaphragm comprises a base membrane and a modified coating, the surface of the base membrane is coated with the modified coating, the base membrane and the modified coating are included, the surface of the base membrane is coated with the modified coating, the modified coating comprises a composite material formed by a carboxylation precursor and a carbon nano tube, the carboxylation precursor is a precursor modified by a carboxyl modifier, and the carbon nano tube is a carbon nano tube. The precursor comprises one of GeS or SnSx, and x is equal to 1 to 2. According to the modified diaphragm provided by the invention, the modified coating is prepared by coating the carboxylation precursor and the carbon nanotube balls, so that the problems of uncontrollable dendritic crystal growth and generated interface side reaction existing in a lithium metal negative electrode of a lithium metal battery can be effectively solved.

The invention discloses cross-linked hyaluronic acid or salt thereof and a preparation method and application thereof, the cross-linked hyaluronic acid or salt thereof is prepared by the following steps: preparing gels with different cross-linking degrees by adopting high and low molecular weights, respectively carrying out partial cross-linking under the conditions of large and small amount of an alkaline solution, and using mixed hyaluronic acid or salt thereof with high and low molecular weights under the condition of large amount of the alkaline solution, the preparation method comprises the following steps: under the condition that the amount of an alkali solution is small, hyaluronic acid with small molecular weight or a salt thereof is used to form a compact network structure to obtain micron gel particles, and a product with the loose structure is diluted and then mixed with the micron gel particles and the hyaluronic acid or the salt thereof for a cross-linking reaction, so that the compact structure penetrates into the loose structure, and the micro gel particles are obtained. The cross-linked hyaluronic acid or salt gel of a soft elastic embedded structure with loose pores wrapping elastic hard balls is formed, and the gel or a composition thereof has excellent supporting / extension / deformation resistance / water absorption / water retention performance and good histocompatibility and is more suitable for tiled injection filling of the inner surface and the outer surface of a cavity.

The present invention discloses a water-based anticorrosive epoxy resin emulsion and a preparation method and application thereof, and belongs to the technical field of water-based coatings. The preparation method provided by the present invention is as follows: a bisphenol A type liquid epoxy resin and a diisocyanate compound are heated to react under the action of a catalyst, and then polyethylene glycol is added to react to obtain a modified epoxy resin emulsifier; the polyethylene glycol is a mixture of PEG4000 and PEG6000; the modified epoxy resin emulsifier and the bisphenol A type liquid epoxy resin are heated and mixed, and then water is added by a phase inversion method to prepare a water-based anticorrosive epoxy resin emulsion. The preparation method of the present invention is simple, does not require special equipment and complex reaction steps, and is suitable for mass production; and the obtained water-based anticorrosive epoxy resin emulsion has good stability, and the metal anticorrosion coating prepared therefrom has strong adhesion, high hardness, excellent impact resistance, good water resistance, and excellent corrosion resistance and corrosion resistance.

This invention discloses a modified activated carbon material for oil and gas recovery and its preparation method, specifically relating to the field of oil and gas recovery and adsorption materials. The modified activated carbon material comprises rice husk activated carbon and graphene oxide in a mass ratio of 1 to 4:1. The modified activated carbon material is prepared by microwave irradiation pretreatment of rice husk activated carbon, followed by graphene oxide loading and high-temperature carbonization and reduction. The microwave irradiation power is 400-800W, and the irradiation time is 2-6 minutes. This invention synergistically applies microwave physical activation and graphene oxide nano-loading to the modification of rice husk-based activated carbon. Microwave treatment rapidly creates pores and increases surface functional groups, providing anchoring points for graphene oxide, significantly improving the specific surface area and porosity of the activated carbon. The resulting modified activated carbon exhibits excellent adsorption performance, is low in cost, and is environmentally friendly.

The invention discloses a water-based anticorrosive epoxy resin emulsion as well as a preparation method and application thereof, and belongs to the technical field of water-based paint. The preparation method provided by the invention comprises the following steps: carrying out heating reaction on bisphenol A type liquid epoxy resin and a diisocyanate compound under the action of a catalyst, and then adding polyethylene glycol for reaction to obtain a modified epoxy resin emulsifier; the polyethylene glycol is a mixture of PEG (Polyethylene Glycol) 4000 and PEG 6000; the modified epoxy resin emulsifier and bisphenol A type liquid epoxy resin are heated and mixed uniformly, and then water is added by a phase inversion method to prepare the water-based anticorrosive epoxy resin emulsion. The preparation method is simple, does not need special equipment and complex reaction steps, and is suitable for large-scale preparation; and the obtained water-based anti-corrosion epoxy resin emulsion is good in stability, and a prepared metal anti-corrosion coating is high in adhesive force, high in hardness, excellent in impact resistance, good in water resistance and excellent in corrosion resistance and corrosion resistance.

The application discloses a temperature-resistant and salt-resistant filtrate reducer based on phenolic resin and a preparation method thereof, and comprises the following steps: S1, under the condition of an acid catalyst, linear phenolic resin is synthesized by polycondensation with phenol and formaldehyde as raw materials; S2, the linear phenolic resin is subjected to etherification reaction with a bromoalkyl nitrile under the condition of alkalinity; and S3, the phenolic resin after etherification is hydrolyzed into amide phenolic resin under the condition of alkalinity. The drilling fluid additive prepared by the application combines the high-temperature resistance of the phenolic resin and the excellent adsorption and filtrate reduction capacity of the polyacrylamide, solves the problem that the existing phenolic resin needs to be used in combination in the drilling fluid, and simultaneously has excellent effects of high-temperature resistance, salt resistance and filtrate reduction.

The present invention relates to a preparation method and application of a composite porous carbon-based negative electrode material of hard carbon coated soft carbon, comprising the following steps: (S1) carbonizing and activating a soft carbon material precursor to obtain soft carbon core particles; (S2) the oxidized soft carbon core particles are grafted and modified with dopamine polyethylene glycol silane, and then in-situ copolymerized with dopamine to obtain composite particles of organosilicon-polydopamine coated soft carbon; (S3) in-situ polymerization of phenolic aldehyde is performed on the surface of the composite particles to form composite particles of phenolic aldehyde coated soft carbon; (S4) the composite particles of phenolic aldehyde coated soft carbon are carbonized and activated to obtain composite porous carbon of hard carbon coated soft carbon; (S5) the composite porous carbon is subjected to silicon deposition and carbon coating to obtain composite porous carbon-based negative electrode material of hard carbon coated soft carbon. The composite porous carbon-based negative electrode material of hard carbon coated soft carbon prepared by the present invention has good electrochemical properties, especially excellent cycle performance and compressive resistance when used in the negative electrode of a lithium battery.

The invention relates to the technical field of PET polyester, and discloses an environment-friendly high-thermal-conductivity polyester material and a preparation process thereof.The polyester material comprises, by weight, 100 parts of polyethylene glycol terephthalate, 10-40 parts of hexagonal boron nitride and 0.5-2.5 parts of sodium polyethyleneimine urea carboxylate; polyethyleneimine ureido sodium carboxylate contains a large amount of active amine activity and sodium carboxylate groups, surface modification of boron nitride is effectively achieved, dispersity of boron nitride can be improved, compatibility with PET is better, the polyester material can keep good mechanical property and tensile strength, and the heat conductivity coefficient and heat conduction and heat dissipation performance of the material are improved. Meanwhile, the surface water contact angle of the polyester material is reduced, and the antistatic performance of the polyester material is improved.

The invention provides a photocuring lining hose and a preparation method thereof, the hose is obtained by sequentially combining a polyethylene film layer, a photocuring fiber resin layer and a polytetrafluoroethylene film layer from inside to outside, the light-curing fiber resin layer is prepared by brushing light-curing resin on two sides of glass fiber cloth; the photocuring resin comprises the following components in parts by weight: 110 parts of epoxy photosensitive modified polyester resin, 2-5 parts of a thickening agent, 32-42 parts of a diluent and 1-2 parts of a defoaming agent; the preparation method of the epoxy photosensitive modified polyester resin comprises the following steps: adding 50-60 parts by weight of epoxy resin and 2-5 parts by weight of a catalyst hexadecyl trimethyl ammonium bromide into 100 parts by weight of unsaturated polyester, and adding 1-3 parts by weight of a polymerization inhibitor hydroquinone when the reaction temperature is 110-120 DEG C, the reaction time is 2 hours and the acid value is lower than 7 mg KOH / g, so as to obtain the epoxy photosensitive modified polyester resin. Then adding 60-65 parts of an active monomer and 5-8 parts of modified hyperbranched polyurethane, keeping the temperature at 80-90 DEG C and stirring for 1 hour, cooling to 70 DEG C or below, adding 4-7 parts of an ultraviolet light initiator, and uniformly mixing to obtain the water-based paint. The tensile strength and the moisture resistance of the product are comprehensively improved.

The invention relates to the technical field of ultraviolet curing pressure-sensitive adhesives, and discloses a UV curing polyacrylate pressure-sensitive adhesive and a preparation method thereof. The polyacrylate pressure-sensitive adhesive prepared by the invention overcomes the defects of poor water resistance, poor flame retardant property and the like of the traditional pressure-sensitive adhesive; due to the introduction of the functional monomer, the water resistance of the pressure-sensitive adhesive can be improved by utilizing organic silicon, and the phenomena of expansion, softening and the like caused by stimulation of factors such as moisture and moisture in an external environment are reduced; according to the composite flame retardant, the flame retardant property of a matrix is improved by adopting an organic and inorganic combined mode. Therefore, the polyacrylate pressure-sensitive adhesive disclosed by the invention has a good application prospect in the fields of automobiles, furniture manufacturing, packaging and the like.

The present application relates to the technical field of chemical materials, in particular to an optical transparent adhesive for flexible folding display screen, which is compounded by modified acrylic copolymer, acrylic resin and the like; firstly, the nano-silicon dioxide is treated by KH570 silane coupling agent, the vinyl group is introduced into the silicon dioxide to obtain the vinyl modified silicon dioxide, then the acrylic ester monomer, the vinyl modified silicon dioxide and the vinyl POSS are mixed, and the polymerization reaction is carried out under the action of the initiator, so that the acrylic ester copolymer containing the silicon dioxide and the POSS group chain segment is obtained, and the modified acrylic copolymer with organic-inorganic hybrid network is formed; on the one hand, the silicon dioxide is treated by KH570, which can effectively improve the compatibility of the silicon dioxide in the component, avoid the agglomeration phenomenon of the silicon dioxide during the reaction, make the silicon dioxide reaction more sufficient and complete, and improve the stability and consistency of the adhesive performance.

The application discloses a kind of composite adsorption materials for water environment purification treatment and preparation method thereof, belong to water treatment functional material technical field.The composite adsorption material uses discarded cow hair as matrix, and the surface of matrix is formed by dopamine self-polymerization and co-deposition with metal composite powder to form polydopamine / metal composite powder coating, and polyallyl glycidyl ether is grafted on the coating by surface-initiated atom transfer radical polymerization, and finally, L-arginine or 2,4-diamino butyric acid is used for ring-opening modification.The metal composite powder is mixed by nano TiO2, nano ZrO2 and nano CeO2 in a specific ratio.The material is modified by zwitterion to give pH responsiveness, and can selectively adsorb anionic or cationic dyes under different pH conditions, and after adsorption saturation, the dyes can be eluted and recovered with dilute acid or dilute alkali, and photocatalytic regeneration can be realized by sunlight irradiation.

The present invention relates to a liquid chromatography stationary phase, which is characterized in that the bonded phase contains a mercaptopyridine structure, and the structural formula thereof is as follows: wherein Silica Gel is silica gel, and n=0-10. The present invention also provides a method for preparing the above-mentioned chromatographic stationary phase, and a novel chromatographic stationary phase is prepared by a mercapto-epoxy ring-opening reaction. The separation material preparation method provided by the present invention is simple and efficient, and the mercaptopyridine structure is contained in the stationary phase, which can provide a variety of forces, and at the same time, a variety of functional groups such as ether bonds and hydroxyl groups can provide different separation selectivities, and can be widely used in the separation and analysis of various compounds.

The present invention relates to the technical field of polyurethane synthesis, and discloses a polyether polyol containing a carbamate structure, a synthesis method thereof and an application thereof, comprising the steps of: adding propylene carbonate, a polyether amine and a combined catalyst into a reactor, mechanically stirring, condensing and refluxing the reaction under an inert gas atmosphere, and removing the propylene carbonate by reduced pressure distillation after the reaction is completed, to obtain the polyether polyol. The present invention selects propylene carbonate and a macromolecular polyether amine as raw materials, and cooperates with a self-designed catalyst to catalyze and realize the improvement of the proportion of primary hydroxyl groups in the product and the improvement of the amine group conversion efficiency of the polyether amine. The catalyst in the method has high selectivity, good efficiency, high conversion rate of the raw materials, and the proportion of primary hydroxyl groups in the product can reach more than 95%, which is very beneficial to the subsequent synthesis of polyurethane.

The invention provides a method for simultaneously extracting rhaponticin, deoxyrhaponticin and anthraquinone compounds from rheum officinale, which can solve the problems of resource waste, high cost, complex process and low recovery rate caused by the fact that rhaponticin, deoxyrhaponticin and anthraquinone compounds cannot be simultaneously obtained by the existing method. The method comprises the following steps: cooking raw materials with boiling water to obtain a first filtrate and residues; adding industrial ammonia water and a first alcohol solution into the residues, stirring, extracting and filtering to obtain a second filtrate, concentrating, refrigerating and filtering to obtain a third filtrate and a first precipitate; modifying macroporous adsorption resin; dissolving the first precipitate with a small-polarity organic solvent, filtering to obtain a fourth filtrate and a second precipitate, concentrating, centrifuging, and combining a clear liquid with the first filtrate and the third filtrate to obtain a mixed liquid; adsorbing the mixed solution with modified macroporous adsorption resin, washing with water, eluting, concentrating and drying to obtain the anthraquinone compound; dissolving the second precipitate, filtering to obtain a fifth filtrate and a third precipitate, and concentrating and crystallizing to obtain a rhaponticin crude product; and refining.

The invention relates to the field of veterinary drugs, in particular to a veterinary drug composition for treating intestinal diseases and a preparation method of the veterinary drug composition for treating the intestinal diseases. The medicine is prepared from the following raw materials in parts by weight: 8-10 parts of lincomycin hydrochloride, 7-10 parts of metronidazole, 2-4 parts of mequindox, 60-65 parts of sodium chloride, 13-16 parts of magnesium sulfate and 5-10 parts of medicinal charcoal capsules. The veterinary drug composition for treating intestinal diseases prepared by the invention has the advantages of good treatment effect, small side effect, no toxicity and no residue.

The present invention belongs to the technical field of sodium ion batteries, and in particular to a sodium ion battery negative electrode sheet and a sodium ion battery. The sodium ion battery negative electrode sheet comprises: a negative electrode current collector; a negative electrode active material layer coated on at least one surface of the negative electrode current collector; the negative electrode active material layer comprises the following weight percentage composition: hard carbon 90-96%, conductive agent 1-3%, thickener 1-3%, binder 1-4%, liquid retaining agent 0.1-0.8%; and the hard carbon particle size distribution D50 (μm), tap density A (g / cm 3 ) and specific surface area B(m 2 / g) satisfies the following relationship: 3.0≤D50≤9.0, 0.1<A / B<1. Compared with the prior art, the flexibility, peeling force and liquid retention rate of the negative electrode sheet of the sodium ion battery provided by the present invention are significantly improved, which solves the problem that the cycle performance and safety performance of the electrode sheet are reduced due to the consumption of electrolyte.