22results about How to "Increased tangle" patented technology

The invention relates to a low-temperature curing polyimide precursor solution and a preparation method thereof. The method comprises the following steps: carrying out condensation polymerization reaction on a dianhydride monomer and a diamine monomer in a reaction solvent to obtain a polyamide acid solution; and adding an amino compound containing one or more special functional groups of pyridine, imidazole, quinoline, pyrimidine and azine into the polyamide acid solution, and fully stirring to enable amino in the compound to fully react with carboxyl in a polyamide acid molecular chain, thereby obtaining the polyimide precursor solution capable of being cured at low temperature. According to the preparation method, the curing temperature of polyimide can be greatly reduced, meanwhile, the mechanical property of the material can be improved, the thermal expansion coefficient can be reduced, and the preparation method can be used for preparing polyimide binders, photoresist, electronic packaging, resin, films, fibers and aerogel.

The invention relates to a UV holographic texture transfer printing adhesive for an automobile interior film and a preparation method, the UV holographic texture transfer printing adhesive for the automobile interior film comprises the following components in percentage by mass: 20%-50% of a prepolymer, 10%-40% of a UV active monomer, 5%-20% of a thermoplastic regulator, 2%-6% of a photoinitiator, 5%-30% of a solvent, 0.2%-1% of a release agent, 0.05%-0.5% of an ultraviolet light absorber and 0.1%-0.5% of an antioxidant, the UV active monomer is a monofunctional acrylate monomer, a bifunctional acrylate monomer or a mixture of monofunctional / bifunctional acrylate monomers. The UV holographic texture transfer printing adhesive for the automotive interior membrane, prepared by the invention, has the advantages of strong surface adhesion, low curing energy, high transparency of a cured membrane, strong thermoplasticity, capability of maintaining continuous texture under a high-temperature forming process and the like, and also has excellent weather resistance and aging resistance; the film is matched with functional layers such as a protective layer, a coating layer and an ink layer to be applied to an IML or INS process of an automotive trim film, and rich and diversified decoration effects can be achieved.

The application provides a static spinning solution containing pyridinium propane sulfonate, a preparation method thereof and a static spinning method thereof. The static spinning solution comprises an additive pyridinium propane sulfonate, PAN polyacrylonitrile and DMF. Experiments prove that the static spinning solution has low cost, can improve the entanglement degree between molecular chains, inhibits the breakage of a solution jet in a static spinning process, and the micro-morphology is improved.

The present application relates to the field of hot melt adhesives, and in particular to a hot melt adhesive and a preparation method thereof. A hot melt adhesive, in parts by mass, comprises raw materials including: 5 to 12 parts of polyolefin elastomer, 40 to 60 parts of amorphous plastomer, 25 to 40 parts of tackifying resin, 10 to 20 parts of modified particles, 1 to 3 parts of antioxidant, 5 to 15 parts of lubricant, 1 to 5 parts of softener, 1 to 4 parts of cross-linking agent, and 1 to 2 parts of initiator. The hot melt adhesive prepared in the present application not only has good adhesion and mechanical properties for difficult-to-bond substrates such as PP / PE, but also can maintain its own excellent aging resistance, corrosion resistance, and waterproof and moisture resistance, meeting the existing automotive industry application requirements for the performance diversity of hot melt adhesives, and has very excellent application prospects in the automotive field.

The application discloses a spherical aluminum nitride silicon grease high-thermal-conductivity interface material composition and belongs to the technical field of thermal-conductivity interface materials.The spherical aluminum nitride silicon grease high-thermal-conductivity interface material composition comprises, in terms of weight parts, 50-80 parts of spherical aluminum nitride and 50-100 parts of modified silicon oil, the modified silicon oil is silicon oil grafted with adamantane molecules and fluorine-containing alkyl groups on the side chain, and the spherical aluminum nitride is prepared by using aluminum powder with low, medium and high particle sizes, wherein the spherical structure guarantees the fluidity of the silicon grease, the introduction of the adamantane molecules and the perfluoroalkyl molecules improves the heat resistance of the silicon oil and reduces the migration rate of the silicon oil, different particle sizes of the spherical aluminum nitride are used in combination for compounding, the filler with a smaller particle size can fill the gaps between the fillers with a larger particle size, a more perfect thermal-conductivity channel is constructed, the gap rate between the filler particles is greatly reduced, and the thermal-conductivity performance of the material is improved.

The invention relates to the technical field of polypropylene composite boards, in particular to a high-strength polypropylene hollow plastic board and a preparation method thereof.The preparation method comprises the following processes that polypropylene, maleic anhydride grafted polypropylene, filler, epoxy resin, a curing agent and auxiliaries are mixed, extruded, drawn and subjected to board pulling forming, and a panel and a core layer are formed respectively; and compounding the panel and the core layer to obtain the polypropylene hollow plastic plate. The polypropylene hollow plastic plate is formed by the panels and the core layer with the hollow structure, so that good mechanical properties are obtained. The branched epoxy resin and the bisphenol A epoxy resin are compounded and added into a material system of the polypropylene hollow plastic plate, so that entanglement and crosslinking among system molecules are increased, the melt strength is enhanced, and the mechanical property, heat resistance, ultraviolet resistance and the like of the prepared polypropylene hollow plastic plate are improved.

A strain-sensing hydrogel with anti-interference properties, its preparation method and application, Ti3C2T x AAM monomers undergo a free radical aggregation reaction, concentrating on both sides of the solution to form a hydrogel isolation layer with anti-interference properties. The central part is a viscous solution. PVA-assisted cryo-casting induces the directional growth of ice crystals, and the aggregation and entanglement of PVA chains yields a strain-sensing hydrogel with anti-interference properties. In a photo-initiated free radical polymerization system, LAP acts as a photoinitiator and PEG as a crosslinking agent to induce a free radical aggregation reaction of AAM. Ti3C2T x The hydrogel, possessing light-absorbing properties, forms an anti-interference hydrogel isolation layer. The sensing layer of the hydrogel consists of physically cross-linked PVA chains. During the directional growth of ice crystals, electrostatic interactions between the PVA polymer chains form hydrogen bonds, resulting in a high-strength, high-toughness hydrogel sensing layer. The PVA and Ti3C2T... x Hydrogen bonds and crystalline domains are formed between AAm, enhancing the mechanical properties of the multilayer hydrogel.

The invention discloses a preparation method of a dietary fiber coffee solid beverage, and belongs to the technical field of food processing solid beverages, the preparation method of the dietary fiber coffee solid beverage provided by the invention comprises the following steps: performing wet processing on fresh coffee fruits to obtain coffee beans and coffee pericarp, baking, grinding and sieving the coffee beans to obtain coffee pericarp; extracting the coffee powder to obtain coffee liquid, and concentrating and drying the coffee liquid to obtain instant coffee powder; the preparation method comprises the following steps: drying coffee pericarp, crushing, sieving, carrying out enzymolysis, centrifuging or filtering, and filtering by using a modified ultrafiltration membrane to obtain soluble dietary fiber oligosaccharide; the instant coffee powder and the soluble dietary fiber oligosaccharide are mixed in proportion, sealed and packaged, and the dietary fiber coffee solid beverage is prepared. The soluble dietary fiber oligosaccharide is obtained by separating the soluble dietary fiber obtained after enzymolysis of the coffee pericarp through the modified ultrafiltration membrane, and high-valued application of the coffee pericarp which is a coffee byproduct is achieved.

The invention relates to the technical field of bio-based fiber materials, and provides a chemically recyclable PLLA fiber with high crystallinity and a preparation method thereof.The preparation method comprises the steps that bio-based pearl layer calcium carbonate extracted from common mussels is treated with a silane coupling agent and then evenly mixed with PLLA master batches according to different mass ratios, granulation is conducted again, and calcium carbonate modified PLLA composite master batches are obtained; the composite master batch is subjected to vacuum drying and then extruded from a spinneret plate of a melt spinning machine, PLLA nascent fibers are obtained, the PLLA nascent fibers are subjected to drafting and heat treatment, and the high-crystallinity PLLA fibers are obtained. The PLLA fiber prepared by the method has the advantages of high crystallinity, good thermal stability, biodegradability and chemical cycle performance. The fabric can be used in textile, clothing and medical fields. The problems that a conventional chemical fiber material cannot be degraded and is harmful to the environment are solved, and meanwhile the problems that a conventional polylactic acid material is low in crystallinity, poor in thermal stability and strength and recyclable are solved.

The invention relates to the field of coatings, in particular to a water-based high-solid-content wear-resistant epoxy coating and a preparation method thereof. The water-based high-solid-content wear-resistant epoxy coating is prepared from the following raw materials in parts by mass: 50 to 70 parts of water-based epoxy resin, 20 to 35 parts of modified resin, 5 to 8 parts of pigment filler, 4 to 8 parts of dispersing agent, 8 to 15 parts of curing agent, 1 to 3 parts of flatting agent, 5 to 15 parts of plasticizer, 0.5 to 1.5 parts of defoaming agent, 15 to 30 parts of modified particles and 100 to 150 parts of deionized water. According to the waterborne high-solid-content wear-resistant epoxy coating and the preparation method thereof provided by the invention, the finally prepared epoxy coating not only has excellent wear resistance, but also can keep excellent water resistance, aging resistance and corrosion resistance at the same time, meets the performance requirements of various industries in the prior art on high-performance high-solid-content epoxy coatings, and has wide application prospects. The market prospect is very excellent.

The application discloses a PAEK melt film forced impregnation and tension synergic control device and belongs to the technical field of material forming. The PAEK melt film forced impregnation and tension synergic control device comprises a pre-combination assembly, an impregnation roller group, a thickness detection assembly and a winding module which are sequentially connected, wherein the pre-combination assembly comprises an extrusion device, a convergence guide block connected with the extrusion device and a fiber guide roller, and the extrusion device extrudes PAEK melt into the convergence guide block. The melt is prepared into a multi-strip structure, and is accurately stacked with a fiber bundle in the convergence guide block to form a sandwich structure similar to lower strips, fibers and upper strips. The fiber guide roller is provided with equidistant fiber grooves corresponding to the strip grooves, and the fiber bundle is accurately positioned. The convergence guide block is provided with a guide shallow groove to provide track guidance for the fibers and prevent the fibers from horizontally migrating during the impregnation.

The invention discloses a high-barrier two-way stretching co-extrusion film and a preparation method thereof, belongs to the technical field of film material processing, and aims to solve the technical problem that the mechanical strength and barrier property of a co-extrusion film in the prior art need to be further improved. The invention discloses a modified montmorillonite modified polyethylene glycol terephthalate composite material, which is prepared from the following ingredients in parts by weight: 60 to 70 parts of polyethylene glycol terephthalate, 30 to 40 parts of polyadipic acid m-xylylenediamine, 25 to 35 parts of composite polyester, 17 to 23 parts of composite polyolefin and 12 to 15 parts of modified montmorillonite. The modified montmorillonite modified polyethylene glycol terephthalate composite material is prepared by selecting polyethylene glycol terephthalate and polyadipic acid m-xylylenediamine as basic materials; the composite polyester containing the rigid polyester chain segment, the composite polyolefin with good flexibility and the modified montmorillonite with good reaction activity are used for enhancing the base material, so that the barrier property of the co-extruded film on oxygen and water vapor is effectively improved, and the mechanical property of the co-extruded film is also improved.

The invention discloses a modified PET material as well as a preparation method and application thereof. The modified PET material comprises the following components in parts by mass: 70-85 parts of a PET matrix; 6-15 parts of a composite monomer; and 1-3 parts of an auxiliary agent. Wherein the composite monomer comprises an alcohol oligomer and epoxy resin, the composite monomer is introduced into the alcohol oligomer and is copolymerized with a PET molecular chain in a PET matrix, so that the rigidity of the molecular chain can be reduced, the flexibility of PET is increased, meanwhile, due to the addition of the epoxy resin, on one hand, the heat resistance of the PET material can be ensured, and on the other hand, the heat resistance of the PET material is improved. The epoxy resin can be subjected to a grafting reaction in the presence of the auxiliary agent, so that the epoxy resin is grafted to PET molecular chains in a PET matrix, entanglement among the molecular chains is enhanced, the interface bonding capacity is improved, the compatibility of the composite monomer and the PET matrix is improved, the flexibility of the modified PET material is kept, and meanwhile, the mechanical property can be considered.

The present invention belongs to the technical field of pharmaceutical preparations, and discloses a lutein microcapsule and a preparation method and application thereof. The present invention mixes lutein with edible alcohol to obtain a core material solution; mixes esterified starch, polyvinyl pyrrolidone and water to obtain a wall material solution; adds the core material solution to the wall material solution to obtain a coarse suspension, and then homogenizes it under high pressure to obtain a nanosuspension; and spray-dries the nanosuspension to obtain a lutein microcapsule. The present invention uses esterified starch and polyvinyl pyrrolidone as wall materials, and there is a certain hydrophobic interaction between the esterified starch and polyvinyl pyrrolidone, so that the molecular chain entanglement degree is relatively high, so as to improve the embedding rate of lutein, and the embedding rate can be as high as more than 95%.

The present invention discloses a flame-retardant, heat-resistant, and UV-resistant energy storage high-voltage wire harness and a preparation process thereof, and belongs to the technical field of energy storage high-voltage wire harnesses. The energy storage high-voltage wire harness comprises a wire core composed of multiple strands of copper monofilaments twisted together, the wire core is wrapped with a flame-retardant and heat-resistant layer, and the flame-retardant and heat-resistant layer is wrapped with an anti-aging sheath layer, characterized in that the flame-retardant and heat-resistant layer adopts an extrusion continuous vulcanization method to tightly wrap the modified silicone rubber material A around the outside of the wire core to form a flame-retardant and heat-resistant layer; the anti-aging sheath layer adopts an extrusion continuous vulcanization method to tightly wrap the modified silicone rubber material B around the outside of the flame-retardant and heat-resistant layer to form an anti-aging sheath layer. An energy storage high-voltage wire harness with excellent flame retardancy, heat resistance, and UV aging resistance is obtained by different modifications of silicone rubber.

The invention relates to a fluoride-free flame-retardant polyphenyl ether resin composition as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The resin composition comprises the following raw material components in parts by weight: 67-80 parts of polyphenyl ether resin; 3 to 10 parts of HIPS (High Impact Polystyrene) resin; 10 to 16 parts of a phosphate ester flame retardant; 3 to 8 parts of cross-linked styrene toughening master batch; 1-3 parts of an inorganic nano flame retardant; 0.2 to 0.5 part of an antioxidant; 0.1 to 0.5 part of a light stabilizer; and 0.5 to 1.0 part of a lubricant. Compared with the prior art, the fluoride-free flame-retardant polyphenyl ether resin composition disclosed by the invention solves the problems that the conventional flame-retardant polyphenyl ether resin needs an anti-dripping agent PTFE for synergistic flame retardance but cannot meet the PFAS prohibition, and the fluoride-free flame-retardant polyphenyl ether scheme adopting phosphonitrile for flame retardance needs high cost, and has a wide application prospect.

The present application relates to the field of coatings, and in particular to a moisture-proof, mildew-proof and corrosion-resistant current transformer coil coating and its preparation method. The moisture-proof, mildew-proof and corrosion-resistant current transformer coil coating, in parts by mass, has the following raw materials: 90 to 110 parts of epoxy resin, 15 to 30 parts of modified filler, 5 to 10 parts of curing agent, 5 to 15 parts of toughening agent, 1 to 3 parts of leveling agent, 1 to 3 parts of defoaming agent, 5 to 10 parts of dispersant, 10 to 30 parts of diluent, 0.5 to 1.2 parts of mildewproof agent, and 5 to 15 parts of functional additives. The current transformer coil coating prepared by the present application can not only have excellent mechanical properties, but also can greatly increase the corrosion resistance, aging resistance, moisture resistance and mildew resistance of the coating, thereby meeting the performance requirements of the current transformer coil coating in the existing use environment, and has a very excellent application prospect.

The invention relates to the technical field of synthetic leather composite materials, and particularly discloses a preparation method of a glass fiber prepreg and PU composite material, which comprises the following steps: pre-impregnating a dopamine / boron nitride modified glass fiber cloth with polyurethane synthesized by polybutylene adipate glycol, polypropylene oxide glycol and diphenylmethane diisocyanate as a resin matrix; the prepreg is filled with fillers such as silicon dioxide modified titanium dioxide, the composite material formed by hot-pressing and compounding the prepreg and the PU synthetic leather is excellent in performance, a hot melt adhesive film is not needed in the forming process, the technological process is simplified, the production efficiency is improved, errors caused by manual lamination are reduced, the percent of pass is improved, and the production cost is saved.

The present invention relates to a preparation method of a silicone stone sealant, and belongs to the technical field of sealants. The present invention creatively improves reinforcing fillers, firstly uses a silane coupling agent containing double bonds to treat fumed silica, modifies the double bonds through the action of silane alkoxy and silanol, then adds methacrylic acid to polymerize the double bonds, modifies the polymer, and finally adds dimethyl octadecyl [3-(trimethoxysilyl)propyl] ammonium chloride as a mildew inhibitor and a long-chain alkyl alcohol as a hydrophobic modifier, thereby utilizing carboxyl and hydroxyl groups for dehydration condensation, thereby preparing a modified fumed silica, and the silicone stone sealant obtained by mixing it with other components not only has excellent mechanical properties and mildew-proof properties when actually used, and the mildew inhibitor is not easy to migrate and escape, but also has super-hydrophobic properties.

The invention relates to the field of organic silica gel, and particularly discloses low-stress high-resilience organic silica gel and a preparation method thereof. The organic silica gel is prepared from the following raw materials in parts by weight: 75 to 80 parts of vinyl silicone oil, 10 to 15 parts of phenyl vinyl silicone oil, 35 to 40 parts of hydrogen-containing silicone oil, 0.1 to 0.5 part of a catalyst, 0.01 to 0.2 part of an inhibitor, 10 to 20 parts of vinyl silane coupling agent modified nano silicon dioxide, 3 to 5 parts of nano carbon black, 1 to 3 parts of carbon nanotubes and 3 to 5 parts of graphene. The material has high elasticity and small compression set.

The invention discloses a safe and non-toxic vulcanization accelerator for rubber and a preparation process thereof, and belongs to the technical field of rubber.The preparation process comprises the steps that a phenolic resin precursor is formed through condensation polymerization and then calcined to form porous carbon microspheres, then the porous carbon microspheres are acidified and then subjected to surface esterification reaction to be grafted with sodium lignin sulfonate, and then a zinc metal framework is formed through hydrothermal coordination; a large number of attachment sites can be provided for molecules of lignin through the space confinement effect of the porous carbon microspheres, the zinc metal framework can be firmly fixed and prevented from being agglomerated by means of subsequent growth of the zinc metal framework through the porous structure, meanwhile, migration of the zinc metal framework in rubber processing is limited, the zinc metal framework can be stably dispersed in a rubber matrix, and the service life of the zinc metal framework is prolonged. The vulcanization reaction is ensured to be synchronously carried out in the rubber, and local over-vulcanization or under-vulcanization is avoided.

The invention belongs to the technical field of polyolefin film materials, and relates to a special material for middle-layer resin of a cold-drawing sleeve packaging film as well as a preparation method and application of the special material. The special material is prepared from the following raw materials in parts by weight: 50 to 90 parts of LLDPE (Linear Low Density Polyethylene), 15 to 30 parts of mLLDPE (Linear Low Density Polyethylene), 1 to 5 parts of UHMWPE (Ultra High Molecular Weight Polyethylene), 2 to 5 parts of EVA (Ethylene Vinyl Acetate) and 0.01 to 0.1 part of chain dispersion driving agent, the LLDPE is linear low density polyethylene resin, and the linear low density polyethylene resin comprises HD-LLDPE and LD-LLDPE. Through optimized raw material components and raw material ratio, under the condition that the use amount of imported mLLDPE raw materials is reduced, the retraction rate and tensile strength of the film are effectively improved, and the appearance performance of the film is improved. And meanwhile, the production cost can be reduced, and the sustainable development principle is met.