508 results about "(Hydroxyethyl)methacrylate" patented technology

The invention relates to the technical field of biodegradable materials, and discloses a full-biodegradable bamboo fiber film material and a preparation method thereof, the full-biodegradable bamboo fiber film material comprises the following raw materials by weight: 30-50 parts of modified bamboo fiber, 20-40 parts of a biodegradable polymer, 3-8 parts of a plasticizer, and 1-5 parts of a cross-linking agent. Acrylic acid grafted hydroxyethyl methylacrylate is grafted to epoxy resin containing azobenzene side chains to form a grafting product of a latticed structure, and the grafting product and hydroxyl groups on bamboo fibers form ether bonds to modify the bamboo fibers. The latticed structure can effectively improve the mechanical property of the film, and azobenzene is grafted to the side chain of bisphenol A epoxy resin, so that the epoxy resin has better degradability.

The invention discloses photocuring conductive hydrogel as well as a preparation method and application thereof. According to the invention, methacryloylethyl sulfobetaine (SBMA), acrylic acid (AA) and hydroxyethyl methylacrylate (HEMA) are used as comonomers, deionized water is used as a solvent, N, N '-methylenebisacrylamide (MBAA) is used as a cross-linking agent, ammonium persulfate (APS) is used as an initiator, tetramethylethylenediamine (TEMED) is used as an accelerator, and 2-hydroxy-4'-(2-hydroxyethoxy)-2-methyl propiophenone (Irgacure2959) is used as a photoinitiator; the conductivity is improved by adding an ionic compound potassium chloride (KCl), and the photocuring conductive hydrogel is prepared in a free radical polymerization manner by adopting an LED-UV curing box. The conductive hydrogel disclosed by the invention has the characteristics of good adhesion property, conductivity, mechanical property and the like, and has wide application in the fields of wearable strain sensors and other flexible electronics.

The invention discloses an implantable absorbable PLA composite material and a preparation method thereof, and relates to the technical field of medical materials. The implantable absorbable PLA composite material is prepared from the following raw materials in parts by weight: 60 to 70 parts of PLA, 5 to 10 parts of poly (lactic-co-glycolic acid), 8 to 12 parts of polycaprolactone, 5 to 8 parts of modified hydroxyapatite, 2 to 3 parts of a toughening agent and 0.2 to 0.6 part of an antioxidant, the toughening agent is prepared by the following steps: reacting hydroxyethyl methylacrylate with ethylenediamine to prepare a four-arm compound, reacting the four-arm compound with 1-chloro-4-isocyanatobutane to prepare an isocyanate compound, and finally reacting the isocyanate compound with polyethylene glycol. The implantable absorbable PLA composite material prepared by the invention has excellent tensile property and impact resistance, and can meet the application requirements of clinical medical treatment.

The invention discloses fiber reinforced concrete for bridge deck pavement and a preparation method thereof, and belongs to the technical field of concrete. The fiber reinforced concrete is prepared from the following raw materials: Portland cement, modified basalt fiber, a slow-release mineralizer, a stress-oriented dispersing aid and the like. The modified basalt fiber is a basalt fiber which is subjected to amino silanization through a silane coupling agent KH-550 and then is catalytically grafted with ethylenediamine tetraacetic acid and hydroxyethyl methylacrylate through DCC (dicyclohexylcarbodiimide); the slow-release mineralizer comprises calcium sulphoaluminate and silicon-based coated nano calcium sulfate; the silicon-based coated nano calcium sulfate is core-shell structure powder formed by coating a nano calcium sulfate core material with a silicon dioxide shell layer; the concrete is strong in interface bonding, excellent in dynamic fatigue resistance, good in durability and stable in volume, and the problem that the mechanical property, the durability and the dynamic anti-interference capability of the concrete cannot be considered at the same time is solved.

The invention relates to the field of fire resistance, in particular to a composite fiber reinforced refractory brick and a preparation method thereof.The composite fiber reinforced refractory brick is prepared from, by weight, 70-80 parts of mullite, 40-50 parts of quartz, 20-30 parts of alumina, 40-60 parts of magnesium aluminate spinel fine powder, 5-10 parts of silicon carbide powder, 1-5 parts of composite fibers and 0.5-1 part of sodium tetrapolyphosphate; wherein the composite fiber is composed of modified zirconium oxide fiber and magnesium metal fiber. According to the preparation method, zirconium oxide fiber dispersion liquid, hydroxyethyl methylacrylate and N, N-methylene acrylamide are subjected to cross-linking polymerization under the action of a silane coupling agent, an initiator and an emulsifier, macromolecular chains are loaded on the surfaces of zirconium oxide fibers, the macromolecular chains are taken as cross-linking points, the zirconium oxide fibers are mutually linked to form a cross-linked polymer, and the zirconium oxide fibers are uniformly dispersed in the cross-linked polymer. The two-dimensional zirconium oxide fibers are constructed into a three-dimensional network structure, and the modified zirconium oxide fibers are prepared. The composite fiber can significantly enhance the strength and mechanical toughness of the refractory brick.

The invention discloses a high-strength modified polyethylene composite fiber and a preparation method thereof, and belongs to the technical field of fiber materials, carboxylated mesoporous silica microspheres are used as a matrix, the surface of the matrix is coated with a graphene sheet layer, then hydroxyethyl methylacrylate is grafted, functionalized graphene / mesoporous silica microspheres are obtained, the functionalized graphene / mesoporous silica microspheres are used as a filler, and the high-strength modified polyethylene composite fiber is prepared. When the polyethylene composite fiber is applied to a ship cable, the overall weight of the ship cable can be reduced, and relative slippage can be generated between graphene lamellas and mesoporous silica microspheres, so that stress is dispersed, and the strength of the polyethylene composite fiber is improved; a hydrophobic alkane long chain is introduced through esterification of the graphene / mesoporous silica microspheres and hydroxyethyl methylacrylate and graft modification of hydroxyethyl methylacrylate, so that the hydrophobic alkane long chain has good compatibility with white oil, and the microspheres are prevented from approaching and gathering by a steric hindrance effect, so that the hydrophobic alkane long chain is more uniformly and stably dispersed in the white oil.

The invention relates to the technical field of waterproof materials, and particularly discloses a high-elasticity waterproof emulsion and a preparation method thereof. The invention discloses a high-elasticity waterproof emulsion. The water-based paint is prepared from the following raw materials in parts by mass: 40 to 60 parts of modified acrylic resin emulsion, 25 to 40 parts of waterborne polyurethane, 3 to 6 parts of hydroxyethyl methylacrylate, 0.5 to 1 part of mercaptopropionic acid, 6 to 8 parts of fluorinated mica sheet, 3 to 6 parts of organic silicon emulsion, 2 to 4 parts of fluorocarbon surfactant, 0.8 to 1.5 parts of adipic dihydrazide, 0.3 to 0.8 part of dynamic cross-linking agent, 3 to 8 parts of compatilizer, 0.5 to 1 part of antioxidant, 0.5 to 1 part of anti-aging agent, 0.5 to 1.5 parts of defoaming agent and 40 to 55 parts of solvent. The modified acrylic resin emulsion is prepared from a monomer comprising diacetone acrylamide. The high-elasticity waterproof emulsion prepared by the invention has relatively good elasticity, waterproof performance and aging resistance.

The invention discloses a method for preparing antibacterial and antistatic polyester fibers by regenerating waste polyester, belongs to the technical field of polyester fiber processing, and is used for solving the technical problem that the antistatic performance, moisture absorption performance and antibacterial performance of polyester fibers in the prior art need to be further improved. The method specifically comprises the following steps: crushing waste polyester, performing alcoholysis to prepare an alcoholysis extract, mixing the alcoholysis extract, polytetrahydrofuran ether glycol, 1, 4-butylene glycol and a catalyst under the protection of inert gas, and performing reaction to obtain the polytetrahydrofuran ether glycol / 1, 4-butylene glycol / polytetrahydrofuran ether glycol / 1, 4-butylene glycol / polytetrahydrofuran ether glycol / 1, 4-butylene glycol composite material. According to the invention, the olefin modified silver-loaded montmorillonite and hydroxyethyl methylacrylate reinforced copolyester polyester fiber with a flexible polyether block structure is subjected to padding modification through the reinforcing modifier, so that the breaking strength and the antistatic property of the polyester fiber are effectively improved, and the moisture absorption property and the antibacterial property of the polyester fiber are also improved.

The invention relates to the field of degradable materials, and discloses a degradable starch-based toy material, a child toy and a preparation method of the degradable starch-based toy material and the child toy. The base material comprises modified plant starch and modified PBAT (poly (butylene adipate-co-terephthalate)) in a mass ratio of (60-70): (30-40); the modified plant starch is plant starch grafted by hydroxyethyl methylacrylate and a silane coupling agent KH-570; the modified PBAT is prepared by mixing, melting and extruding PBAT, maleic anhydride and coupling agent modified nano SiO2; the compatilizer is a segmented copolymer of PEG grafted plant starch and PBS. The starch and PBAT are modified, the compatilizer is added, the safe, environment-friendly and biodegradable child toy material can be successfully manufactured, and on the premise that it is guaranteed that the performance of the composite material meets the manufacturing requirements of child toys, the starch proportion is increased, and meanwhile the comprehensive performance of the child toys is guaranteed.

The invention relates to the technical field of high polymer materials, and discloses a wear-resistant and anti-slip plastic tray and a manufacturing method thereof. Comprising the following steps: S1, adding polytetrahydrofuran glycol and dihydroxyl-terminated polysiloxane into acetone, uniformly stirring, heating to 65-70 DEG C, adding isophorone diisocyanate and a tin catalyst, and stirring for 2-3 hours to obtain an isocyanato-terminated polyurethane prepolymer; adding a branching agent, reacting for 2-3 hours at the temperature of 60-70 DEG C, adding hydroxyethyl methylacrylate, stirring and reacting until the content of isocyanate groups in the system is not changed any more, and carrying out rotary evaporation to remove the solvent, so as to obtain modified polyurethane acrylate; s2, taking urethane acrylate, a photoinitiator, modified urethane acrylate, modified silicon dioxide and a diluent, and uniformly stirring to obtain a wear-resistant antiskid coating; and S3, the outer surface of the tray base body is coated with the wear-resistant and anti-skid coating, curing is conducted, and the wear-resistant and anti-skid plastic tray is obtained.

The invention provides an acrylate assistant for PVC (polyvinyl chloride) and a preparation method of the acrylate assistant, and belongs to the technical field of acrylate assistants. The preparation method comprises the steps of nano montmorillonite functionalization, synthesis of a core layer, synthesis of a middle layer and synthesis of a shell layer. The synthesis step of the core layer comprises the following steps: adding a core layer emulsion into a reaction kettle, adding an ammonium persulfate solution for the first time, heating to 64-68 DEG C, adding an ammonium persulfate solution for the second time, and reacting for 48-55 minutes to obtain a functionalized core emulsion; the core layer emulsion is prepared from deionized water, functionalized nano montmorillonite, sodium allyloxy hydroxypropyl sulfonate, butyl acrylate, 2-ethylhexyl acrylate, hydroxyethyl methylacrylate and gamma-methacryloyloxypropyltrimethoxysilane through ultrasonic treatment, and the core layer emulsion is prepared from the deionized water, the functionalized nano montmorillonite, the sodium allyloxy hydroxypropyl sulfonate, the butyl acrylate, the 2-ethylhexyl acrylate, the hydroxyethyl methylacrylate and the gamma-methacryloyloxypropyltrimethoxysilane through ultrasonic treatment; the prepared acrylate auxiliary agent is used in PVC, the fluidity can be improved, and meanwhile the impact resistance, the strength performance and the high-temperature stability performance are enhanced.

The application belongs to the technical field of membrane separation materials, and discloses an ultrahydrophilic oil-water separation membrane, a preparation method and application thereof, and comprises the following steps: 2-(2-bromoisobutyryloxy)ethyl methacrylate monomers are prepared from 2-hydroxyethyl methacrylate and 2-bromoisobutyryl bromide, and a polymer with an atom transfer radical polymerization initiator is prepared through a free radical polymerization reaction; the polymer with the atom transfer radical polymerization initiator and polyacrylonitrile are dissolved into a solvent, and a PAN / P(AN-g-BIEM) blended membrane is prepared through a non-solvent induced phase separation method; and a hydrophilic polymer brush is grafted to the surface of the PAN / P(AN-g-BIEM) blended membrane to obtain the ultrahydrophilic oil-water separation membrane; the ultrahydrophilic oil-water separation membrane prepared by the application has a high separation flux, excellent oil-water separation efficiency and separation performance for different oil-in-water emulsions.

The invention discloses an inorganic copolymer anticorrosive paint and a preparation method thereof, and relates to the technical field of paints. The invention discloses inorganic copolymer anticorrosive paint. The coating is prepared from the following raw materials in parts by weight: 20 to 30 parts of silica sol, 8 to 15 parts of sodium hydroxide, 30 to 45 parts of metakaolin, 8 to 20 parts of quartz sand, 15 to 25 parts of water, 0.3 to 2 parts of sodium polyacrylate, 0.2 to 3 parts of polydimethylsiloxane emulsion, 5 to 12 parts of modified nano titanium dioxide, 6 to 10 parts of modified epoxy resin, 10 to 25 parts of hydroxyethyl methylacrylate, 5 to 10 parts of zinc phosphate, 3 to 8 parts of aluminum triphosphate and 2 to 6 parts of iron oxide red. The raw materials of the inorganic copolymer anticorrosive paint are scientifically proportioned, and the anticorrosive performance is enhanced through the modified nano titanium dioxide and the epoxy resin. Material uniformity is ensured through step-by-step feeding and ultrasonic dispersion in preparation, and stability is improved through vacuum defoaming and nitrogen protection. The components such as the silica sol and the zinc phosphate have a synergistic effect to form a compact coating, and the coating is high in corrosion resistance, good in constructability and suitable for various scenes.

The invention provides a water-soluble core mold material based on direct-writing forming photocuring 3D printing and a preparation method of the water-soluble core mold material. The preparation method comprises the following steps: mixing polyvinylpyrrolidone and absolute ethyl alcohol to prepare a water-soluble adhesive; fully mixing a photocuring monomer hydroxyethyl methylacrylate with a photoinitiator TPO (Thermoplastic Polyolefin) to prepare water-soluble photocuring resin; mixing the two materials, stirring with a high-speed stirrer, sequentially adding heavy calcium carbonate powder, glass beads, white carbon black and glass fiber powder in the stirring process, and fully stirring to obtain slurry; and the slurry is printed through a printer, a core mold primary blank is obtained, and the final core mold material is obtained through secondary curing. According to the water-soluble core mold material based on direct-writing forming photocuring 3D printing and the preparation method of the water-soluble core mold material, the technical problems that a traditional metal mold is difficult to design, high in manufacturing cost and low in demolding efficiency are solved, and the water-soluble core mold material which is good in rheological property, low in cost and easy to demold can be prepared.

The invention relates to the technical field of high polymer materials, in particular to an EVA / nano-zinc oxide anti-ultraviolet car cover and a preparation method thereof. The invention aims to solve the problem that the mechanical strength and the ultraviolet resistance of the existing car cover are difficult to consider at the same time. Ethylene-vinyl acetate resin is used as a matrix, a silane coupling agent and hydroxyethyl methylacrylate surface modified and grafted composite nano-zinc oxide, maleic anhydride grafted EVA and a polyurethane modifier are subjected to melt blending, a TMPTA cross-linking agent is added, and the vehicle cover film is prepared through extrusion casting and ultraviolet curing. Wherein the polyurethane modifier is obtained by reacting polycaprolactone polyol with isophorone diisocyanate and adopting hydroxyethyl methylacrylate and 2, 2 '-methylenebis (6-tert-butyl-4-methylphenol) for end capping. The uvioresistant car cover prepared by the invention has excellent tensile strength, elongation at break, uvioresistant performance and adhesive force at the same time.

The invention relates to the technical field of hydrogel materials, and discloses an oxygen-permeable silicon hydrogel material for contact lenses and a preparation method thereof.The preparation method comprises the steps that ethylene glycol diglycidyl ether and bis (2-chloroethyl) amine hydrochloride are subjected to a ring-opening reaction, and an intermediate product 1, 2-propylene glycol is obtained; carrying out substitution and hydrolysis reaction on the polyalkenyl quaternary ammonium salt and diethyl iminodiacetate to obtain an intermediate product 2, and carrying out quaternization reaction on the intermediate product 2 and chloropropene by utilizing a tertiary amine structure contained in the intermediate product 2 to obtain the polyalkenyl quaternary ammonium salt. And finally, carrying out polymerization reaction on the silicon hydrogel, hydroxyethyl methylacrylate, gamma-(methacryloyloxy) propyltrimethoxysilane and vinyl-terminated dimethyl polysiloxane, putting the obtained product into a contact lens half mold for reaction, and demolding to obtain the oxygen-permeable silicon hydrogel material. The hydrogel material prepared in the invention has good hydrophilic effect and oxygen permeation effect, and can be widely applied to contact lenses.

The invention provides an up-conversion imaging system for infrared image vision, comprising an up-conversion film for infrared imaging adapted to be attached to a lens wherein the film comprises up-conversion nanoparticles and a polymer matrix wherein the up-conversion nanoparticles are selected from up-conversion gold nanoparticles Au / NaGdF4: Yb < 3 + >, NaGdF4: Yb < 3 + >, Yb < 3 + >, Yb < 3 + >, Yb < 3 + >, Yb < 3 + >, Yb < 3 + >, Yb < 3 + >, Yb < 3 + >, Yb < 3 the polymer matrix comprises a copolymer which is formed by copolymerizing 2-hydroxyethyl methacrylate and methacrylic acid, and the polymer matrix comprises a copolymer which is formed by copolymerizing 2-hydroxyethyl methacrylate and methacrylic acid; the mass concentration of the up-conversion nanoparticles is 0.1%-10%; the thin film is used for converting near-infrared light with the wavelength ranging from 880 nm to 1532 nm into visible light with the wavelength ranging from 380 nm to 700 nm. The invention also provides a preparation method of the up-conversion sheet for infrared light imaging and an infrared light imaging system.

The invention discloses a staged delayed coagulation and viscosity reduction type iron aluminate cement water reducing agent and a preparation method thereof. The iron aluminate cement water reducing agent is obtained by copolymerizing prepared isopentenol polyoxyethylene ether borate, hydroxyethyl methylacrylate glucolactone and methacrylic acid. The boric acid ester is rapidly hydrolyzed in the initial stage of hydration (9 < pH < 12) to obtain boric acid, and first-stage delayed coagulation is performed on the aluminoferrite cement. When delayed coagulation fails, the cement continues to be hydrated to reach the middle stage of hydration (pH > 12), glucolactone is hydrolyzed to generate gluconate for further delayed coagulation of the cement, meanwhile, hydroxyethyl methylacrylate is hydrolyzed to release more adsorption sites, and hydration products are further dispersed to reduce the viscosity of the system. And stage release enables the aluminoferrite cement to be hydrated stage by stage, so that the problem of poor bleeding cohesiveness caused by non-hydration of the cement after one-time doping of the retarder is solved, the problem of slurry tackifying caused by large hydration of the cement in the later stage is also avoided, and engineering application of the aluminoferrite cement is further promoted.

The invention discloses a fluorine coating melt-extruded on the surface of a polyimide film and a preparation method of the fluorine coating, and relates to the technical field of coating materials. The fluorine coating melt-extruded on the surface of the polyimide film is prepared by melt-mixing a component A, a component B and a fluorine-containing polymer, melt-extruding and coating the mixture on the surface of the polyimide film, the component A is a hydroxyl mixture, and the component B is an end-capped prepolymer; the hydroxyl mixture comprises hydroxyl terpyridine and hydroxyl fluorocarbon resin, the hydroxyl terpyridine is prepared by reacting diacetylpyridine with 3, 4-dihydroxyethoxy benzaldehyde, the 3, 4-dihydroxyethoxy benzaldehyde is prepared by reacting 3, 4-dihydroxybenzaldehyde with 2-chloroethanol, and the hydroxyl fluorocarbon resin is prepared by reacting 3, 4-dihydroxybenzaldehyde with 2-chloroethanol. The hydroxyl fluorocarbon resin is prepared by reacting butyl acrylate, hexafluorobutyl acrylate, dodecafluoroheptyl methacrylate, methacrylic acid and 2-hydroxyethyl methacrylate; the fluorine-containing polymer is prepared by carrying out a reaction on p-aminobiphenyl, 2, 3, 5, 6-tetrafluoroterephthalaldehyde and sodium triacetoxyborohydride, and the p-aminobiphenyl is prepared by carrying out a reaction on decafluorobiphenyl and 4-aminophenol; and the water resistance of the polyimide film coated with the fluorine coating is ensured.

The present invention relates to a debondable solvent-borne pressure sensitive adhesive composition comprising a) a (meth)acrylate co-polymer formed from the monomers selected from the group consisting of ethyl (meth)acrylate, methyl acrylate, butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, 3-epoxypropyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, hydrogenated polybutadiene(meth)acrylate, glacial acrylic acid, vinyl acetate, and mixtures thereof; b) an electrolyte selected from the group consisting of 1-butyl-3-methylimidazolium bis(trifluoromethylsolfonyl)imide, 1-ethyl-3-vinylimidazolium methanesulfonate, 1-dodecyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, tributyl(ethyl) phosphonium diethyl phosphate, trihexyltetradecylphosphonium bis(trifluoromethylsulfonyl)amide and mixtures thereof; c) a cross-linker; and d) a solvent.

The invention relates to a polycarboxylic acid water reducer and a preparation method thereof, and the water reducer is prepared from the following raw materials: 45 to 55 percent of isopentenyl polyoxyethylene ether, 28 to 35 percent of acrylic acid, 1.5 to 2.5 percent of modifier, 0.3 to 0.5 percent of ammonium persulfate, 0.03 to 0.06 percent of ascorbic acid, 5 to 8 percent of hydroxyethyl methylacrylate, 0.15 to 0.25 percent of 2, 4-diphenyl-4-methyl-1-pentene and the balance of water. The modifier is prepared from the following raw materials: 1, 5-dichloronaphthalene, p-nitrostyrene, dimethyl sulfate, ceric ammonium nitrate and tetramethylpiperidine oxide. The polycarboxylate superplasticizer has excellent neat paste fluidity and fluidity retention capability, has low 1h time-dependent variable slump which is below 18mm and optimally 10mm when applied to concrete, has a water-reducing rate of more than 40% and a gas content of less than 3.8%, and also has more advantages in compressive strength ratio.

The invention belongs to the technical field of water treatment, and particularly discloses a green scale inhibitor for barium sulfate and a preparation method thereof, the scale inhibitor is a product generated by esterification reaction of polysuccinimide and hydroxyethyl methylacrylate under alkaline conditions, and a copolymer formed by graft copolymerization of aconitic acid and sodium lignin sulfonate, wherein the mass ratio of polysuccinimide to hydroxyethyl methylacrylate to aconitic acid to sodium lignin sulfonate is 2: 4: (1-6): (1-4). The scale inhibitor is a composite copolymer formed by polymerizing and grafting a product obtained after esterification of polysuccinimide / hydroxyethyl methylacrylate, aconitic acid and sodium lignin sulfonate, has carboxyl, hydroxyl, amino, sulfonic acid and other groups at the same time, and can generate strong interaction with key ions or sites in the BaSO4 crystal growth process, so that the scale inhibitor can be used for inhibiting the growth of BaSO4 crystals. The normal growth and aggregation of BaSO4 crystals are prevented, so that the formation of BaSO4 scales is effectively inhibited.

The present invention discloses a fluorocarbon powder coating and a preparation method thereof, belonging to the technical field of powder coatings, which comprises the following steps: premixing methyl methacrylate, 2-hydroxyethyl methacrylate, 1H,1H,2H,2H-hexafluorobutyl methacrylate and methyl p-coumarate to obtain a premixed solution; transferring the premixed solution to a reaction kettle, heating up, adding an initiator, carrying out a reaction, filtering, and drying to obtain a modified acrylic resin, then carrying out melt mixing and extrusion to obtain material A; putting PVDF fluorocarbon resin and a filler into a reaction kettle, heating up and stirring to obtain material B, adding material A and modified PMMA, stirring, cooling and pressing into tablets to obtain the powder coating. The fluorocarbon powder coating of the present invention can maintain the advantage of high weather resistance, while also improving the internal compatibility and anti-ultraviolet performance, and enhancing the internal bonding effect of the double-layer powder body.

The invention relates to the technical field of thickening agents, and particularly discloses a novel thickening agent for oil well fracturing and a preparation method thereof. The preparation method of the novel thickening agent for oil well fracturing comprises the following steps: preparing modified hydroxyethyl methylacrylate; preparing a gradient branched polymer solution; preparing sulfonic acid-boric acid double-modified montmorillonite powder; preparing a colloidal solution; the colloidal solution is centrifuged, spray-dried and sieved, and the novel thickening agent for oil well fracturing is obtained. The novel thickening agent for oil well fracturing has temperature resistance, salt resistance and self-repairing performance, in practical application, in the low-temperature pumping injection stage, the thickening agent can be rapidly thickened and carry a proppant, the self-repairing performance is triggered after the thickening agent enters a high-temperature stratum, a dynamic network part is dissociated during flowback, the viscosity is reduced, and reliable technical support is provided for development of deep shale gas and tight oil.

The invention discloses a dense dual-network anti-swelling self-adhesion hydrogel sensor based on multiple dynamic crosslinking as well as a preparation method and application of the dense dual-network anti-swelling self-adhesion hydrogel sensor. The preparation method specifically comprises the following steps: adding acrylic acid, hydroxyethyl methylacrylate, a chemical cross-linking agent and a photoinitiator into deionized water, and stirring at room temperature until the materials are completely dissolved; then, adding a certain amount of tannic acid and chitosan quaternary ammonium salt into the mixture, and fully stirring until a uniform precursor solution is formed; then, the precursor solution is transferred into a reaction template, and the reaction template is placed under an ultraviolet lamp to initiate curing; therefore, the anti-swelling hydrogel can be obtained, in various solvents, the material has good anti-swelling performance and shows excellent adhesion and sensing durability, and the problems that a traditional hydrogel sensor is limited in application in a wet environment and loses sensing performance are solved. The system can be widely applied to human body motion monitoring and underwater information transmission in a water environment, and underwater communication is realized.

The invention discloses a bio-based modified high polymer material and a preparation method thereof, and relates to the technical field of high polymer materials. When the bio-based modified high polymer material is prepared, firstly, lignin reacts with terephthalaldehyde to prepare formylated lignin; carrying out multi-component reaction on the aldehyde lignin to obtain modified lignin; the preparation method comprises the following steps: reacting 4-mercaptophenylboronic acid with 1-mercaptoglycerol to prepare a dimercaptoborate cross-linking agent; the preparation method comprises the following steps: reacting isophorone diisocyanate with polytetrahydrofuran ether glycol, and then reacting with a flame-retardant chain extender, 1, 2-propylene glycol and hydroxyethyl methylacrylate to prepare modified polyurethane; and mixing the modified polyurethane, the modified lignin and a dimercaptoborate cross-linking agent, casting and curing to obtain the bio-based modified high polymer material. The bio-based modified high polymer material prepared by the invention has the advantages of flame retardance, antibacterial property, aging resistance, self-repairing property, repeatable processing and high mechanical strength.

The invention relates to the technical field of polyurethane adhesives, and particularly discloses a special polyurethane adhesive as well as a preparation method and application thereof. The invention discloses a special polyurethane adhesive. Comprising the following raw materials in parts by weight: 40 to 45 parts of castor oil, 25 to 30 parts of polycaprolactone glycol, 30 to 35 parts of isophorone diisocyanate, 0.05 to 0.1 part of dibutyltin dilaurate, 5 to 8 parts of dimethylolpropionic acid, 3 to 5 parts of a sulfur-containing chain extender, 4 to 6 parts of a functional filler, 3 to 5 parts of hexadecyl trimethoxy silane, 8 to 12 parts of hydroxyethyl methylacrylate, 0.8 to 1.2 parts of a photoinitiator and 60 to 70 parts of deionized water. The special polyurethane adhesive prepared by the invention adopts a unique raw material formula and process, has the characteristics of light curing and water dispersion, forms a compact cross-linked network after being cured, shows excellent heat and humidity resistance, interface bonding strength and mechanical stability, and can be applied to the field of adhesive materials. The adhesive is suitable for material surfaces with high-performance bonding requirements in the fields of automobiles, electronics, buildings and aerospace.

The invention discloses a high-strength PET composite material and a preparation method thereof, and belongs to the technical field of high polymer materials, graphene aerogel is used as a matrix, a vinyl core-shell complex is loaded on the surface to obtain a functional complex / graphene aerogel, 1, 4-benzene diphosphonic acid and hydroxyethyl methylacrylate are grafted to obtain a flame-retardant functional ligand, and the flame-retardant functional ligand is used for preparing the high-strength PET composite material. The preparation method comprises the following steps: copolymerizing a functional complex / graphene aerogel, a flame-retardant functional ligand and double bonds in N-isopropylacrylamide to obtain three-dimensional net-shaped hydrogel, covering the functional complex / graphene aerogel with the three-dimensional net-shaped hydrogel, calcining to form a carbon layer by the three-dimensional net-shaped hydrogel on the outer layer, embedding the flame-retardant functional ligand into the carbon layer, and drying to obtain the flame-retardant graphene aerogel. Pores of the three-dimensional network hydrogel are smaller than pores of the functional complex / graphene aerogel, so that a gradient porous structure is formed, stress transition is realized through different pores, and formation of local stress concentration points is avoided.

The invention relates to a dental resin composition with an antibacterial function as well as a preparation method and a detection method thereof. The composition comprises a basic resin matrix and a basic resin matrix, wherein the basic resin matrix is prepared from the following components in percentage by weight: 35wt% of bisphenol A diglycidyl ether dimethacrylate (Bis-GMA), 40wt% of triethylene glycol dimethacrylate (TEGDMA), 24wt% of 2-hydroxyethyl methacrylate (HEMA), 0.5 wt% of camphorquinone (CQ) and 0.5 wt% of N, N-dimethyl-4-ethyl aminobenzoate (EDMAB); chlorinated catechol functional monomer: chlorinated catechol monomer Cl-DMA as shown in formula (I), chemical name of chlorinated catechol monomer Cl-DMA is N-(2-chloro-4, 5-dihydroxyphenethyl) methacrylamide, and structural formula of chlorinated catechol monomer Cl-DMA is # imgabs0 #

The invention relates to the technical field of corrosion resistance, in particular to a towel rack surface corrosion-resistant spraying process, which is characterized in that a towel rack is treated in a spraying manner, and modified graphite phase carbon nitride is introduced into a protective coating as a filler by performing component design on the coating for spraying and then performing light curing treatment; the preparation method comprises the following steps: by taking tyrosine and thiourea as precursors, preparing graphite phase carbon nitride nanosheets by a microwave method, then preparing a zinc oxide-graphite phase carbon nitride binary composite nanomaterial by a hydrothermal method, carrying out double-bond treatment on composite graphite phase carbon nitride by utilizing vinyltriethoxysilane, and then grafting long-chain alkyl modified polysilazane containing double bonds; the preparation method comprises the following steps: by taking castor oil as a raw material, synthesizing a prepolymer together with isophorone diisocyanate under the action of a catalyst, taking 3-dimethylamino-1, 2-propylene glycol as a chain extender, taking 2, 2-dimethylolpropionic acid as a hydrophilic chain extender, and taking hydroxyethyl methylacrylate and hydroxylated long-chain alkyl modified polysilazane as end-capping reagents.