556 results about "Polypropylene glycol" patented technology

The invention provides a polyether ester defoaming agent and a preparation method thereof. Firstly, glycidyl ether and short-chain alcohol react to prepare polyether, and finally, fatty acid is used for blocking to prepare polyether ester 1 #; glycidyl ether, polyethylene glycol and / or polypropylene glycol react to prepare polyether, and finally fatty acid is used for blocking to prepare polyether ester 2 #; glycidol ether, short-chain alcohol, polyethylene glycol and / or polypropylene glycol react to prepare polyether, unsaturated fatty acid continues to be used for blocking to obtain polyether ester, the polyether ester and hydrogen-containing silicone oil continue to react to obtain branched silicon polyether 3 #, and the two polyether esters and the branched silicon polyether are compounded and cooperated to form the final polyether ester defoaming agent. The polyether ester 1 #, the polyether ester 2 # and the branched silicon polyether 3 # all have hyperbranched structures, the polyether ester 1 # improves the dispersing performance and the instant defoaming performance of the defoaming agent, the polyether ester 2 # and the branched silicon polyether 3 # improve the foam inhibition performance of the defoaming agent, and the three substances are compounded to form the stable polyether ester defoaming agent with both defoaming and foam inhibition performance.

The invention relates to an interface-enhanced carbon fiber sizing agent as well as a preparation method and an application method thereof, and belongs to the technical field of sizing agents. The interface enhanced carbon fiber sizing agent is prepared from the following components in parts by weight: 90 to 100 parts of epoxy resin, 5 to 10 parts of dicyandiamide and 30 to 50 parts of nonionic surfactant, wherein the epoxy value of the epoxy resin is not less than 0.4 mol / 100g; the nonionic surfactant comprises at least one of alkylphenol polyoxyethylene ether, fatty acid polyoxyethylene ether, polyethylene glycol and polypropylene glycol. The bonding capacity between the sizing agent and carbon fibers and matrix resin can be effectively enhanced, so that the interface performance of the carbon fiber composite material is effectively improved.

The invention relates to the technical field of proton exchange membranes, and provides a covalent grafted heteropoly acid modified perfluorosulfonic acid membrane as well as a preparation method and application thereof. According to the invention, polypropylene glycol monoalkyl ether and Keggin type vacancy heteropoly acid are subjected to covalent grafting, and then the obtained covalent grafted heteropoly acid is used as an additive to modify the perfluorosulfonic acid membrane, so that the leakage problem of heteropoly acid in the proton exchange membrane can be effectively relieved, and meanwhile, the excellent proton conduction performance of heteropoly acid is also retained; moreover, the polypropylene glycol monoalkyl ether has relatively large molecular weight, so that the heteropoly acid can be anchored more firmly in the perfluorosulfonic acid membrane, and the proton conduction capability of the heteropoly acid is fully exerted. The result of the embodiment shows that the covalent grafted heteropoly acid modified perfluorosulfonic acid membrane provided by the invention shows excellent proton conduction performance and chemical stability, and has a wide application prospect.

The invention discloses a low-staining low-viscosity waterborne polyurethane macromolecular coloring agent and a preparation method of the low-staining low-viscosity waterborne polyurethane macromolecular coloring agent. Comprising the following components in parts by weight: 15 to 30 parts of aliphatic diisocyanate, 15 to 30 parts of micromolecular dye, 10 to 30 parts of polypropylene glycol and / or dihydroxy silicone oil, 25 to 50 parts of polyethylene glycol, 1 to 3 parts of micromolecular dihydroxy compound chain extender, 0.05 to 0.3 part of catalyst, 90 to 140 parts of acetone and 50 to 300 parts of water. By designing the hydrophilicity and proportion of the soft and hard segments of the polyurethane coloring agent, the waterborne polyurethane macromolecular coloring agent color paste which is low in staining, easy to clean, less than 1000mpas in product viscosity, more than 5% in color concentration and more than 5% in dye equivalent and good in compatibility is finally obtained, and the waterborne polyurethane macromolecular coloring agent color paste can meet the requirements of liquid product coloring agents such as clothing care and household cleaning agents. The cleaning agent can also be used for liquid cleaning agent products for body care and catering.

The invention relates to the technical field of electronic adhesives, in particular to an n-hexane-containing polyurethane electronic adhesive and a preparation method thereof.The n-hexane-containing polyurethane electronic adhesive is prepared from, by weight, 40-45 parts of polyether polyol, 25-30 parts of polypropylene glycol, 35-40 parts of isocyanate, 1-2 parts of 1, 4-butanediol, 0.02-0.03 part of a catalyst, 6-7 parts of flame-retardant heat-conducting filler, 1.2-1.5 parts of foaming microcapsules and 1-2 parts of a foam stabilizer; by adding the flame-retardant heat-conducting filler and the foaming microcapsule taking normal hexane as a core, the problem that the existing polyurethane electronic glue is poor in heat-conducting property after foaming is solved, and meanwhile, the polyurethane electronic glue also has good flame-retardant property.

The present invention discloses an infrared-shielding polyurethane glass film and a preparation method thereof, relating to the field of polymer materials technology. When preparing the infrared-shielding polyurethane glass film, the present invention comprises reacting an organic nickel complex and 3-imidazole-1-propionic acid to produce a functionalized crosslinker; sequentially reacting 4-aminophenylacetonitrile with 3-hydroxypropyl acrylate and quinoline-4-carboxaldehyde to produce a UV-absorbing monomer; reacting polypropylene glycol, a UV-absorbing monomer, 1,4-butanediol, and 4-chloromethyl-1,3-phenylenediisocyanate to polymerize to produce polyurethane; reacting tungsten-doped titanium dioxide and chloropropyltriethoxysilane to produce modified titanium dioxide; and uniformly mixing the polyurethane, modified titanium dioxide, the functionalized crosslinker, and acetone, followed by coating and curing to produce the infrared-shielding polyurethane glass film. The infrared-shielding polyurethane glass film prepared by the present invention has excellent infrared shielding, anti-aging, antibacterial, and mechanical properties.

The invention relates to hot baking type selective ink and a preparation method thereof. The hot baking type selective ink comprises the following components in parts by mass: 10-20 parts of acrylic resin, 10-20 parts of fluorine-containing polyacrylate, 20-40 parts of an active monomer, 3-10 parts of a photoinitiator, 5-20 parts of modified boron nitride and 1-10 parts of an auxiliary agent, wherein the modified boron nitride is obtained by reacting boron nitride with a silane coupling agent and polypropylene glycol diglycidyl ether. The fluorine-containing polyacrylate is obtained by reacting fluorine-containing acrylate, acrylate and maleic anhydride. According to the invention, not only are the film-forming property and the stability of the ink improved, but also the corrosion resistance, the strength and other properties are enhanced, the protective effect can be more effectively exerted, the stable operation of the PCB is ensured, the problems in the prior art are solved, the requirements of the industry on multiple properties of products are met, and the application prospect is good.

The invention relates to the technical field of coatings, in particular to an inorganic nano-composite coating material applied to corrosion prevention of a splash zone and a preparation method of the inorganic nano-composite coating material. The inorganic nano composite coating material applied to corrosion prevention of the splash zone comprises a component A and a component B. The preparation method comprises the following steps: step 1, reacting dodecafluoroheptyl methacrylate, vinyl dimethyl phosphate and liquid epoxy resin to obtain modified liquid epoxy resin; 2, after the modified liquid epoxy resin reacts with carboxyl-terminated liquid nitrile rubber, polypropylene glycol diglycidyl ether is added, and a component A is obtained; the aliphatic polyamine reacts with oleic acid to obtain a curing agent, and the amino-modified nano silicon dioxide is mixed with the curing agent to obtain a component B; the prepared coating material is high in adhesive force, high in hydrophobicity, good in impact resistance and good in corrosion resistance.

The invention provides an electrocoppering plating solution for filling X-shaped holes of a printed circuit. The electrocoppering plating solution comprises copper sulfate pentahydrate, sulfuric acid and sodium chloride, and an additive system comprises a first type of additive, a second type of additive and a third type of additive; the first type of additive is one or more of polyethylene glycol, polypropylene glycol, ethylene oxide and propylene oxide segmented copolymer, and the second type of additive is one or more of sodium dithiodipropane sulfonate, 3-mercapto-1-sodium propane sulfonate, phenyl sodium dithiodipropane sulfonate and 2-mercaptobenzimidazole. The third type of additive is one or more of 1-methyl-4-nitroimidazole, azathiopurine, 6-mercaptopurine and 2-thioxanthine, when the compound is applied to X-type hole filling, the high-quality filling effect is achieved, meanwhile, the average thickness increase of surface copper is controlled to be smaller than 13 microns, the recession degree is controlled to be smaller than 4 microns, the thickness of the surface copper is controlled to be smaller than 10 microns, and the surface copper is controlled to be smaller than 10 microns. Wherein the control capability of the surface copper thickness is in a leading position in similar inventions and existing production technologies.

The present application relates to the field of textile technology, and specifically discloses a high-elastic hygroscopic antistatic composite fiber and a preparation method thereof; a high-elastic hygroscopic antistatic composite fiber, comprising the following raw materials in parts by weight: 20-40 parts of polytrimethylene terephthalate, 60-80 parts of polyethylene terephthalate, 10-18 parts of nano inorganic particles, 5-8 parts of sericin, 5-10 parts of sulfonic acid hydrophilic modifier, 3-5 parts of polyether ester antistatic agent, 5-8 parts of carbon nanotubes, and 1-3 parts of surfactant; the polyether ester antistatic agent is preliminarily prepared into an antistatic masterbatch with carbon nanotubes; by combining polytrimethylene terephthalate and polyethylene terephthalate, under the synergistic effect of other components, the elasticity, antistatic and hygroscopic properties of the composite fiber can be improved on the basis of maintaining the original strength of the fiber.

The invention provides a water-in-oil adjuvant for animal vaccines and a preparation method and application thereof, and relates to the technical field of biology, the water-in-oil adjuvant comprises 73%-75% of oil for injection, 20%-23% of an emulsifier and 2%-7% of a stabilizer; the emulsifying agent is prepared from 4.5 percent to 5 percent of polyoxyethylene fatty alcohol ether, 3.0 percent to 3.5 percent of glycerol monoisostearate, 7.0 percent to 8.0 percent of span 80, 4.5 percent to 5 percent of Tween 80 and 1 percent to 1.5 percent of vitamin E; the vaccine prepared from the water-in-oil adjuvant has the advantages that the viscosity is reduced, and the injection is easy. The technical problems that in the prior art, a vaccine prepared from an oil-in-water adjuvant is large in viscosity, so that resistance is large during injection, the occurrence rate of side reactions is high, an injection part swells, and granuloma is formed are solved.

The invention relates to the field of inorganic material preparation, and particularly discloses pseudo-boehmite and a preparation method thereof. A preparation method of pseudo-boehmite comprises the following steps: (1) mixing an aluminum salt solution and an aluminate solution, adding a crystal form regulating agent, and stirring for reaction to obtain a sol system; the crystal form regulating agent is ZnS quantum dots modified by thiohydracrylic acid; (2) adding a pore diameter guiding agent into the sol system, and aging for 6-8 hours; the pore diameter guiding agent is a compound of a polyethylene glycol-polypropylene glycol-polyethylene glycol triblock copolymer and sodium citrate; and (3) carrying out solid-liquid separation on the aged sol system, and washing and drying the obtained solid to obtain the pseudo-boehmite. The proportion of 5-10nm pores of the pseudo-boehmite prepared by the preparation method disclosed by the invention reaches 90% or above, so that the pore distribution requirement of a fine catalytic reaction on the pseudo-boehmite can be met, and the efficient catalytic reaction is favorably realized.

The invention belongs to the technical field of 3D printing photocuring, and particularly relates to photocuring organic silicon modified polyurethane acrylate resin as well as preparation and application thereof. According to the invention, isophorone diisocyanate is used as a hard segment, polypropylene glycol-1000, dimethylolpropionic acid and dihydroxy-terminated silicone oil are used as soft segments, and the light-cured organic silicon modified polyurethane acrylic resin is synthesized with pentaerythritol triacrylate. By controlling the hydroxyl content in the double-terminal hydroxyl silicone oil and the proportion of the double-terminal hydroxyl silicone oil in a soft segment, the prepared organic silicon modified polyurethane acrylic resin has better flowability and light transmittance and higher double bond content; the organic silicon modified polyurethane acrylic resin, the acryloyl morpholine and the photoinitiator are cured according to a specific proportion, and the obtained elastomer has good mechanical properties and thermal stability and has high printing precision. The synthesized organic silicon modified polyurethane acrylate resin has the potential of replacing a traditional polyurethane acrylate material.

The invention discloses a simple preparation method of a high-starch-content, high-strength and low-cost biological polyester film bag material, and belongs to the field of biodegradable high-molecular materials. PBAT, high-molecular-weight polylactic acid, starch, a compatible modifier, a biological chain extender and an antioxidant are put into a mixing mill to be mixed at a high speed, and pre-dispersed mixed granules are obtained; the preparation method comprises the following steps: adding the raw materials into an internal mixing and extrusion integrated reverse twin-screw extruder, firstly melting and internal mixing for in-situ reaction, then starting extrusion, cooling the extruded material by air cooling, then cutting and collecting granules, and taking an amphiphilic block copolymer polypropylene glycol-polyethylene glycol-polypropylene glycol (PPG) as a modifier, the use amount of polylactic acid is small, the starch content is high, plasticizing is not needed, the components are easy to obtain, the multi-phase interface permeation adhesion is high, the system is uniform, the method is simple, and the cost is low; the biodegradable plastic has the advantages of toughness of PBAT, strength of PLA, low price of starch and compatibilization and reinforcement of amphiphilic blocks, and is suitable for processing of biodegradable film bags, dustproof nets, plastic parts and other bioplastic products.

The invention discloses a two-component epoxy pouring sealant as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The bi-component epoxy pouring sealant comprises a component A and a component B. The component A comprises the following raw materials: 60-100 parts of modified epoxy resin; 5-25 parts of a reactive diluent; 1 to 10 parts of nano silicon dioxide; the component B comprises the following raw materials in parts by mass: 50-60 parts of an alicyclic amine curing agent; 20-30 parts of a polyether amine curing agent; 10 to 15 parts of methyl tetrahydrophthalic anhydride; 3-5 parts of a silane modifier; 0.1 to 0.5 part of a defoaming agent; the modified epoxy resin is prepared by carrying out esterification reaction on bisphenol A type epoxy resin and long-chain fatty acid for modification and then carrying out graft modification with polypropylene glycol diglycidyl ether. In addition, the invention also provides a preparation method of the two-component epoxy pouring sealant. The epoxy pouring sealant provided by the invention has excellent bonding performance on non-polar plastics such as PP / PE and the like.

A laminating adhesive with improved digital ink lamination properties comprising an isocyanate component and a polyol component. The isocyanate component comprises an isocyanate prepolymer and an aliphatic polyisocyanate. The polyol component comprises an ester-exchanged polyester polyol made from an aromatic polyester polyol and a natural oil, a polypropylene glycol, and a phosphate adhesion promoter. The isocyanate prepolymer in the isocyanate component comprises a reaction product of an isocyanate and a polyalkylene glycol polymer. The laminate structure can be made by coating at least a portion of a substrate with the adhesive and contacting the first substrate with a second substrate.

The invention provides a composite wall material microcapsule emulsion and a preparation method thereof, which are used for solving the problems of yellowing, harmful residues and no high temperature resistance. The invention relates to a composite wall material microcapsule emulsion, which comprises: essence; an SMA emulsifier and a Span80 emulsifier; the component A is prepared from aliphatic isocyanate, beta-cyclodextrin, ethylenediaminetetraacetic acid, polypropylene glycol or polyethylene glycol, and the molecular weight of the polypropylene glycol and the polyethylene glycol is smaller than or equal to 400; and water.

The present invention provides an epoxy resin adhesive and a preparation method thereof, and relates to the technical field of building structure adhesives, the epoxy resin adhesive is prepared from a component A and a component B, the component A comprises the following raw materials by weight: 90-110 parts of epoxy resin, 15-25 parts of a toughening agent, 40-50 parts of a filler I and 15-20 parts of benzyl alcohol, and the toughening agent comprises polycarbonate, polyamide and polypropylene glycol diglycidyl ether; the component B is prepared from the following raw materials in parts by weight: 40 to 60 parts of curing agent, 10 to 20 parts of filler II, 1.5 to 3 parts of polyvinylpyrrolidone and 5 to 10 parts of benzyl alcohol. The preparation method comprises the following steps: S1, preparing A glue; s2, preparing B glue; and S3, mixing glue. The toughening agent is added in the component A, polycarbonate, polyamide and polypropylene glycol diglycidyl ether are selected as the toughening agent, the three raw materials are compounded and cooperated, the processability and flowing property of the epoxy resin adhesive can be effectively improved, and the problems that a cured finished product is high in brittleness and poor in impact resistance are solved.

The invention relates to a liquid detergent composition comprising a first surfactant selected from fatty alcohol ether sulfates, a second surfactant selected from betaines, optionally at least one solvent selected from ethanol, propanol, isopropanol, ethylene glycol, butyl glycol, propylene glycol, polypropylene glycol, alcoholamine, monoethanolamine, glycerol and mixtures thereof, wherein the salt concentration in the composition is about 0.2 to about 10 wt.-% and wherein the salt is selected from the group consisting of sodium salts such as sodium chloride, sodium sulfate, sodium formate, sodium acetate or sodium propionate, potassium salts such as potassium chloride, potassium sulfate, potassium formate, potassium acetate or potassium propionate, magnesium salts such as magnesium chloride, magnesium sulfate, magnesium formate, magnesium acetate or magnesium propionate, and calcium salts such as calcium chloride, calcium sulfate, calcium formate, calcium acetate or calcium propionate, and mixtures thereof, and wherein the composition is a concentrate that can be diluted with water while maintaining or increasing the viscosity.The present invention further relates to the use of such a cleaning composition for cleaning hard surfaces, in particular dishes, and to a process for preparing a cleaning composition, the process comprising diluting the concentrated liquid cleaning composition with water.

A tattoo ink particularly useful for light skin. The tattoo ink includes one or more pigment in a carrier solution. The carrier solution includes polyvinyl alcohol, water, ethanol, and a humectant. The humectant may be glycerin or polypropylene glycol or a blend of thereof. The carrier solution may also include witch hazel extract. The polyvinyl alcohol may have a molecular weight range of 30,000 to 85,000 and be at least 98% hydrolyzed.

The invention belongs to the technical field of waterborne polyurethane dispersions, and particularly discloses a bio-based waterborne polyurethane printing adhesive and a preparation method thereof. The bio-based waterborne polyurethane printing adhesive is prepared from the following raw materials in parts by mass: # imgabs0. The bio-based waterborne polyurethane printing adhesive is prepared from bio-based polymer polyols, such as polytetrahydrofuran ether glycol and polypropylene glycol with 100% bio-based content, polycarbonate diol with 50-70% bio-based content, polyethylene glycol with 50-70% bio-based content, polyethylene glycol with 50-70% bio-based content and polyethylene glycol with 50-70% bio-based content, wherein the bio-based polymer polyols are similar to or completely identical to a petroleum-based structure; the characteristics of the traditional petroleum-based waterborne polyurethane printing adhesive are maintained; the prepared bio-based waterborne polyurethane printing adhesive has high bio-based content and is unique in the field of waterborne printing.

The invention relates to the technical field of low-zinc composite active agents, in particular to a low-zinc efficient composite active agent for blended rubber and a preparation method thereof.The preparation method comprises the following steps that zinc acetate, zinc nitrate, zinc sulfate and urea are mixed to prepare nano-zinc oxide, and the nano-zinc oxide is modified with polypropylene glycol to obtain modified nano-zinc oxide; mixing and stirring a dispersing agent, stearic acid, modified nano zinc oxide, multi-walled carbon nanotubes and magnesium oxide under the protection of inert gas to prepare a blend, and curing and molding the blend through a condensation granulation process to obtain the low-zinc high-efficiency composite activator for blended rubber. The prepared low-zinc efficient composite active agent for the blended rubber shortens the vulcanization time of the blended rubber, is excellent in dispersity and enhances the mechanical properties, including tensile strength and elongation at break, of the blended rubber, and in addition, the preparation method is simple and convenient to operate and low in cost and has a good industrial application prospect.

The invention relates to the technical field of composite coating preparation materials for battery diaphragms, in particular to a composite coating for a battery diaphragm as well as a preparation method and application. The invention discloses a graphene quantum dot / carbon nanotube composite material, which is prepared from the following components in percentage by weight: 3 to 8 percent of aminated graphene oxide-polydopamine graft, 10 to 18 percent of polyimide-polyetheretherketone-nano SiO2 hybrid, 2 to 5 percent of hydroxyapatite-montmorillonite core-shell particles, 0.5 to 3 percent of zinc borate-melamine cyanurate compound, 1 to 3 percent of graphene quantum dot-carbon nanotube hybrid, 2 to 6 percent of sodium carboxymethyl cellulose and 50 to 70 percent of deionized water. 0.5 to 2 percent of barium strontium titanate nanocrystalline or 1 to 3 percent of polyethylene glycol-polypropylene glycol segmented copolymer can also be added. All the components are combined through molecular-level reaction to construct a high-performance protection network. The composite coating is good in high temperature resistance and mechanical strength, high in ionic conduction efficiency, excellent in flame retardant effect and good in interfacial compatibility, the preparation process is environmentally friendly and easy to industrialize, the composite coating is suitable for various batteries, and the comprehensive performance of the composite coating is superior to that of a traditional coating.

The invention discloses an infrared shielding polyurethane glass film and a preparation method thereof, and relates to the technical field of high polymer materials. When the infrared shielding polyurethane glass film is prepared, an organic nickel complex and 3-imidazole-1-propionic acid react to prepare a functional cross-linking agent; the preparation method comprises the following steps: reacting 4-aminophenylacetonitrile with 3-hydroxypropyl acrylate and quinoline-4-formaldehyde in sequence to prepare an ultraviolet absorption monomer; the preparation method comprises the following steps: carrying out reaction polymerization on polypropylene glycol, an ultraviolet absorption monomer, 1, 4-butanediol and 4-chloromethyl-1, 3-phenyl diisocyanate to prepare polyurethane; the tungsten-doped titanium dioxide and chloropropyltriethoxysilane are subjected to a reaction, and modified titanium dioxide is prepared; uniformly mixing polyurethane, modified titanium dioxide, a functional cross-linking agent and acetone, and coating and curing to obtain the infrared shielding polyurethane glass film. The infrared shielding polyurethane glass film prepared by the invention has excellent infrared shielding, anti-aging, antibacterial and mechanical properties.

The invention provides bio-based MS base resin, bio-based MS glue and a preparation method of the bio-based MS base resin and the bio-based MS glue, and belongs to the technical field of high polymer materials. The MS base resin is isocyanate group silane terminated bio-based polyether polyol or polyether polyol subjected to chain extension. The polyether polyol is selected from one or more of bio-based polyethylene glycol, bio-based polypropylene glycol, bio-based poly (trimethylene ether glycol) and bio-based polytetrahydrofuran ether glycol. And mixing the bio-based MS base resin, the plasticizer, the filler, the catalyst III, the coupling agent and the auxiliary agent, and stirring under a vacuum condition to obtain the bio-based MS adhesive. The bio-based MS adhesive prepared by the invention is high in bio-based material content, uncomplicated in preparation process and low in energy consumption, and meanwhile, an adhesive body is good in mechanical property, high in stability and good in high temperature resistance and humidity and heat resistance.

The present invention provides: a packaging material which is excellent in terms of breaking resistance and easy tearability; a polyisocyanate composition which is suitable for the manufacturing of this packaging material; and an adhesive.　The present invention specifically provides a polyisocyanate composition (X) which contains a polyisocyanate compound (A), wherein: the polyisocyanate compound (A) contains 60 mass% or more of a bifunctional polyisocyanate compound (A1) that is derived from a non-aromatic diisocyanate; a polyol mixture contains 70 ± 1 mass% of a polypropylene diol that has a hydroxyl value-based number average molecular weight of 415 ± 20 and 30 ± 1 mass% of a polypropylene triol that has a number average molecular weight of 415 ± 35; a coating film, which is obtained by curing with the molar ratio [NCO] / [OH] of the isocyanate groups of the polyisocyanate compound (A) to the hydroxyl groups of the polyol mixture being 1.3 ± 0.1, has an elongation at break of 30% or more as determined at a tensile rate of 200 mm / minute at 25°C and a humidity of 40%.

The invention discloses a high-strength energetic compound based on a polydopamine and thiourea polymer and a preparation method of the high-strength energetic compound, and the energetic compound is composed of energetic crystal 1, 3, 5-triamino-2, 4, 6-trinitrobenzene, the polydopamine and the thiourea polymer. The preparation method comprises the following steps: modifying an energetic crystal 1, 3, 5-triamino-2, 4, 6-trinitrobenzene through polydopamine in advance; the polythiourea is obtained through reaction of 2, 2 '-(ethylene dioxygen) diethylamine, carbon disulfide and trimethylolpropane tripolypropylene glycol ether, and the addition amount is 2.5 wt.%-10 wt.%; and mixing the two components by a kneading method, and drying to obtain the energetic compound. The obtained compound has the characteristics of strengthening and toughening, the Brazil mechanical strength reaches 14.76 MPa, and the fracture strain reaches 0.474%. By introducing polyphenol polydopamine and polythiourea to achieve a synergistic effect, the mechanical property of the explosive is greatly improved, and a technical support can be provided for the application of the explosive; meanwhile, the preparation method is simple, mild in reaction condition and easy for large-scale production.

The invention relates to a composition for a suspension chain modified PSE elastomer, the suspension chain modified PSE elastomer and a preparation method of the suspension chain modified PSE elastomer, and belongs to the technical field of high polymer material science and engineering. The composition is prepared from 55 to 75 weight percent of PUSH resin, 14 to 25 weight percent of bisphenol A epoxy resin, 0.3 to 1 weight percent of accelerant and 10 to 25 weight percent of draping chain compound, the drape chain compound is selected from at least one of phenyl glycidyl ether, C12 to C14 glycidyl ether and cardanol glycidyl ether; wherein the PUSH resin is obtained by polymerizing isocyanate, a combination A and 2, 2 '-(1, 2-ethanedioxy) diethanethiol according to a molar ratio of 1: (0.4-0.6): (0.9-1.1), and the combination A is prepared from polypropylene glycol and polyether triol according to a molar ratio of 1: (0.3-4). The overhanging chain modified PSE elastomer provided by the invention has excellent comprehensive damping performance and especially has a wider damping temperature range.

The invention discloses a room-temperature curing single-component epoxy conductive adhesive and a preparation method and application thereof, and relates to the technical field of conductive adhesives, the single-component epoxy conductive adhesive is prepared from the following components by weight: 100-140 parts of epoxy resin, 20-25 parts of a flexibilizer, 5-15 parts of an epoxy diluent, 10-15 parts of a curing agent, 5-40 parts of silver powder, 4-6 parts of a curing accelerator, and 5-10 parts of single-walled carbon nanotubes. The epoxy resin is one or more of liquid bisphenol A type epoxy resin and liquid bisphenol F type epoxy resin, and the toughening agent is one of phthalic acid esters, polysulfide rubber or polypropylene glycol diglycidyl ether. According to the room temperature curing single-component epoxy conductive adhesive as well as the preparation method and the application thereof, the single-walled carbon nanotubes and the multi-walled carbon nanotubes are added into the prepared single-component epoxy conductive adhesive, so that the conductivity of the single-component epoxy conductive adhesive can be ensured, the cost of the single-component epoxy conductive adhesive is greatly reduced, and the heat conductivity of the single-component epoxy conductive adhesive can be improved.

Hyaluronic acid and silk fibroin or silk fibroin fragments tissue fillers and methods of making and using the same are provided herein. In some embodiments, the disclosure relates to a biocompatible tissue filler comprising silk fibroin or silk fibroin fragments, hyaluronic acid (HA), and polyethylene glycol (PEG) and / or polypropylene glycol (PPG), wherein a portion of the HA is modified or crosslinked by one or more linker moieties comprising one or more of polyethylene glycol (PEG), polypropylene glycol (PPG), and a secondary alcohol, wherein the linker moieties are attached to the HA at one end of the linker.