233results about How to "Improve interface compatibility" patented technology

The invention relates to the technical field of composite materials, in particular to a silicone rubber composition and a preparation method thereof. The silicone rubber composition is prepared from the following raw materials in parts by weight: 100 parts of methyl vinyl silicone rubber, 25-35 parts of white carbon black, 2.8-3.0 parts of hydroxyl silicone oil, 1.1-1.2 parts of hydrogen-containing silicone oil, 0.8-1 part of a cross-linking agent, 20-30 parts of an additive A, 6-8 parts of an additive B and 1.5 parts of a silane coupling agent KH-550. The additive in the additive A is carbonized and forms an intumescent flame-retardant system in the reaction under the combined action of mannitol and bamboo fiber, and generates a flame-retardant gas during decomposition, so that the fire resistance and flame retardance of the silicone rubber composition can be effectively improved, and meanwhile, the additive B is capable of effectively improving the flame retardance of the silicone rubber composition based on the loading of blumea oil and chitosan quaternary ammonium salt. The blumea oil endows the material with an anti-aging function through the good anti-oxidation characteristic, so that the thermal stability and durability of the silicone rubber composition are effectively improved under the combined action of the additives.

The invention discloses a polypropylene composite material with high dielectric constant, high strength and high modulus as well as a preparation method and application thereof, and belongs to the technical field of polymer composite materials. According to the composite material, homo-polypropylene is used as a matrix and matched with a high-dielectric-constant composite filler, a modified reinforcing filler and a functional additive, and through reasonable component design and process optimization, the dielectric property and the mechanical property are synergistically improved. Wherein the barium titanate-graphene with the core-shell structure is used as a high-dielectric-constant composite filler, and an efficient dielectric path can be constructed in a polypropylene matrix; the epoxy resin modified chopped glass fiber can significantly enhance the mechanical strength and modulus of the material; the maleic anhydride grafted polypropylene effectively improves the interfacial compatibility of the filler and the matrix. The dielectric constant (10GHz) of the prepared composite material is greater than or equal to 8, the tensile strength is greater than or equal to 60 MPa, and the bending modulus is greater than or equal to 4000 MPa. The composite material has excellent dielectric properties and mechanical properties, and can be widely applied to the fields of electronic appliances, high-frequency communication, new energy automobiles and the like.

The invention discloses an application of engineered citrobacter freundii in fermentation synthesis of a stable body. The engineered citrobacter freundii is citrobacter freundii overexpressing a polyphosphate kinase gene Ppk1. The stable body prepared by fermenting the engineered citrobacter freundii is rich in polyphosphates and polyamines, particularly, the content of the polyamines can be up to 21wt%, the polyphosphates in the stable body can store the polyamines in an ionic bond combination mode, the combined polyamines are insoluble in water, a natural anion coating is generated, and the stability of the stable body is improved. And the sustained-release tablet is not easily taken by intestinal epithelial cells, so that the sustained-release tablet has a certain sustained-release effect. The medicine prepared by taking the compound as a main active ingredient shows a remarkable curative effect in ulcerative colitis treatment, has the comprehensive effects of reducing oxidative stress, enhancing the anti-inflammatory ability of a body and regulating immunity, is suitable for patients of all ages, and has outstanding application value and market prospect.

This invention relates to the field of anti-corrosion coating technology, specifically to a water-based corrosion-inhibiting anti-corrosion coating and its preparation method. When zinc phosphate is used alone as a corrosion inhibitor in water-based anti-corrosion coatings, it tends to agglomerate and has poor compatibility with resins. The protective coating formed on the metal surface by these water-based anti-corrosion coatings exhibits poor and unstable corrosion resistance. To address these problems, this invention provides a water-based corrosion-inhibiting anti-corrosion coating composed of two components, A and B. Component A contains a self-made composite corrosion inhibitor, ZnP-PEG-IPTS-GO. This composite corrosion inhibitor, through the bridging of IPTS, chemically bonds GO, PEG, and zinc phosphate, achieving an organic combination of "physical shielding" and "active passivation," significantly improving the overall anti-corrosion performance of the coating.

The invention provides flame-retardant tread rubber as well as a preparation method and application thereof. The flame-retardant tread rubber is prepared from the following raw materials in parts by weight: 100 parts of matrix rubber, 24-35 parts of a composite flame retardant, 40-100 parts of filler, 1-4 parts of a silane coupling agent, 2-6 parts of an anti-aging agent, 1-3 parts of sulfur, 1-3 parts of an accelerant, 1-3 parts of stearic acid and 3-5 parts of zinc oxide, the composite flame retardant comprises a halogen flame retardant and an inorganic flame retardant, the inorganic flame retardant comprises an inorganic coating flame retardant, and the inorganic coating flame retardant comprises an antimony trioxide core and a molybdenum disulfide coating layer coating the surface of the antimony trioxide core. In the flame-retardant tread rubber disclosed by the invention, a molybdenum disulfide coating layer in the inorganic coating flame retardant can improve the stability of antimony trioxide at a high temperature, and can enhance the interfacial compatibility with a non-polar rubber matrix at the same time, and the synergistic reaction with the halogen flame retardant further improves the flame-retardant effect; therefore, the flame retardancy of the rubber is improved, and excellent mechanical properties are kept at the same time.

This invention relates to a method for preparing integrated high thermal conductivity layered material silicone rubber gaskets for heat dissipation in electronic packaging based on peeling. The method involves mixing polydopamine-modified boron nitride or graphite powder, silicone rubber, a silane coupling agent, and a bis(2,5)-pentachlor vulcanizing agent in a three-roll mill. By reducing the roller spacing and extending the mixing time, the boron nitride or graphite powder is peeled off within the composite material under the shear force of the rollers. The resulting mixture is placed in a metal mold and subjected to vacuum hot-pressing vulcanization, followed by a secondary vulcanization, to obtain a high thermal conductivity silicone rubber gasket for heat dissipation in electronic packaging. This method has broad application prospects in the fields of electronic packaging and thermal management.

The application discloses a photosensitive polyimide resin, a polyimide composition and a preparation method thereof. The photosensitive polyimide resin has a molecular structure as shown in formula (1). The aminoized hyperbranched polysiloxane unit with hydrophobic characteristics is introduced into the polyimide molecular main chain to form a micro-crosslinking structure between the molecular chains, and the crosslinking reaction of the photosensitive unit effectively improves the resolution of the photoresist and reduces the thermal expansion coefficient of the patterned film. The rich Si-O-Si units in the hyperbranched polysiloxane and the low polarity and hydrophobic characteristics of the CF3 unit can reduce the dielectric constant of the patterned film. The Si-O-Si network unit has better interface compatibility with glass and a silicon wafer, thereby forming stronger interface force and improving the adhesion between the photoresist and the substrate.

The invention discloses a PLA (polylactic acid) laminated composite material as well as a preparation method and application thereof, and belongs to the technical field of laminated paper. 20 to 30 parts of a bio-based toughening component; 15 to 25 parts of cationized filler; 2-4 parts of a heat-resistant compatilizer; 1 part of a nucleating agent TMC-300; the heat-resistant compatibilizer is a terpolymer formed by norbornene imide, 1, 6-hexanediol diacrylate and glycidyl methacrylate, according to the PLA lamination composite material provided by the invention, through the synergistic effect of the heat-resistant compatibilizer and the cationization filler, an organic-inorganic dual-reinforcement system is constructed, the material body performance is enhanced, the heat-resistant compatibilizer and the cationization filler are combined, and the heat-resistant compatibilizer and the cationization filler are combined, so that the heat-resistant compatibilizer and the cationization filler are combined, and the heat-resistant compatibilizer and the cationization filler are combined. And the interface bonding strength of the lamination layer and the paper is improved, and finally, the full-biodegradable lamination material with high heat resistance, excellent flexibility and firm interlayer bonding force is prepared and is suitable for preparing heat-resistant lamination paper products.

This invention discloses an impact-resistant photovoltaic encapsulating film, its preparation method, and a photovoltaic module. The photovoltaic encapsulating film comprises multiple layers of unidirectional prepreg tape laminated together. The unidirectional prepreg tape is obtained by melt impregnation of thermoplastic resin and continuous fibers surface-treated with a coupling agent. The thermoplastic resin includes polyolefin elastomer (POE) and POE grafts. During the melt impregnation process, the continuous fibers surface-treated with the coupling agent and the POE grafts undergo a chemical reaction to achieve compatibility. This invention employs a pre-melt impregnation followed by crosslinking technique. The uncrosslinked POE resin has good fluidity and can be fully melt-impregnated with the continuous fibers. Electron beam irradiation post-treatment technology allows the impregnated base film to undergo a crosslinking reaction, resulting in a fiber-reinforced impact-resistant photovoltaic encapsulating film. The film prepared by this invention meets industry technical standards for UV resistance, aging resistance, and impact resistance, while also being low-cost and simple to manufacture, making it widely applicable in the field of lightweight flexible photovoltaic modules.

This invention belongs to the field of membrane separation technology, specifically relating to a method for preparing a polytetrafluoroethylene (PTFE) composite membrane. The preparation method includes: (1) dissolving a spinning aid, a barium source, a titanium source, and a manganese source in a composite solvent, and then electrospinning to obtain precursor fibers; subsequently, blending the precursor fibers with a grain refiner, and heat-treating to obtain doped ferroelectric fiber bundles; (2) further polymerizing organic acids, inorganic acids, conductive fillers, and conductive polymers with monomers and oxidants to finally obtain a conductive polyaniline composite; (3) incorporating Mxene and the conductive polyaniline composite into an aqueous PTFE emulsion, and then further incorporating the doped ferroelectric fiber bundles and stirring to obtain a suspension; the suspension is then coated, post-treated, and kept warm to obtain a PTFE composite membrane. This invention improves the long-term fouling resistance of the PTFE membrane by doping the doped ferroelectric fiber bundles, the conductive polyaniline composite, Mxene, and PTFE.

The invention discloses a low-smoke halogen-free flame-retardant cable for a charging pile, and belongs to the technical field of cables. The cable sequentially comprises a conductor, an insulating layer and an outer sheath layer from inside to outside, the conductor is formed by mutually twisting copper-tin alloy wires; the insulating layer is made of butadiene styrene rubber; the outer sheath layer is prepared from the following components in parts by weight: 40 to 60 parts of high-density polyethylene, 15 to 20 parts of acrylate rubber, 10 to 15 parts of ethylene-vinyl acetate copolymer, 8 to 10 parts of modified silicon dioxide, 3 to 8 parts of compatilizer, 1 to 2 parts of antioxidant and 1 to 2 parts of lubricant. The prepared modified silicon dioxide is used as a flame-retardant reinforcing component in the outer sheath layer, and the comprehensive performance of the low-smoke halogen-free flame-retardant cable for the charging pile can be remarkably improved.

This invention provides a covalent organic framework hybrid matrix membrane, its in-situ growth method, and its application in ion separation. The method includes: dissolving cellulose derivatives, aldehyde monomers of covalent organic frameworks, and amine monomers of covalent organic frameworks in an organic solvent to obtain a first solution, a second solution, and a third solution; mixing acetic acid solution with the first, second, and third solutions to obtain a homogeneous casting solution; and drop-coating the homogeneous casting solution for in-situ growth. This invention constructs a CD@COF hybrid matrix membrane based on a cellulose derivative matrix and a low-loading covalent organic framework filler using an in-situ growth method. The prepared hybrid matrix membrane exhibits good interfacial compatibility between the matrix and the filler. The above-mentioned hybrid matrix membrane preparation process is simple, possesses good mechanical strength and high scalability, and demonstrates high ion flux and excellent ion selectivity for separating monovalent and divalent ions. It has broad application prospects in wastewater resource treatment, lithium extraction from salt lakes, and energy storage.

The invention provides a low-water-absorption glass bead modified PBT (polybutylene terephthalate) material and a preparation method thereof. The low-water-absorption glass bead modified PBT material comprises the following components in parts by weight: 70-100 parts of PBT resin; 0 to 30 parts of solid glass beads; 0-5 parts of a toughening agent; 0-2 parts of an antioxidant; 0-2 parts of a lubricant; 0-2 parts of black color master batch; 0-2 parts of a coupling agent; 0-5 parts of polytetrafluoroethylene wax; wherein the average particle size of the solid glass beads is 1-50 [mu] m; the average particle size of the polytetrafluoroethylene wax is 3-15 [mu] m, and the weight-average molecular weight of the polytetrafluoroethylene wax is 10000-30000 g / mol; the weight ratio of the solid glass beads to the polytetrafluoroethylene wax is (5-10): 1. According to the invention, the polytetrafluoroethylene wax is added into the solid glass bead modified PBT material, so that the shrinkage difference between the material flow direction and the vertical flow direction is effectively reduced, the water absorption rate of the material is remarkably reduced, the preparation process is simple, and the production process is easy to control.

The invention relates to an LSPC foamed sheet and a preparation method thereof, and belongs to the technical field of foamed materials. In order to solve the problems that an existing foamed stone-plastic plate is uneven in foam hole, insufficient in strength and prone to local collapse, a novel foam regulator is introduced into a PVC-based foaming system. According to the regulator, through hydrosilylation, ring opening and silane coupling reaction, a polysiloxane-alkyl ester functional structure is grafted on the surface of nano silicon dioxide, bubbles are induced to be uniformly nucleated by utilizing low surface tension of the functional structure, and bubbles are inhibited to be aggregated through an interface adhesion energy barrier, so that a uniform and fine closed-pore structure is formed. The density of the obtained LSPC board is reduced, and the LSPC board has excellent mechanical strength and high-temperature collapse resistance and is suitable for bearing, floor heating and other scenes.

The invention discloses a degradable carton containing modified plant fibers and a preparation method of the degradable carton, and relates to the technical field of carton production. According to the degradable carton containing the modified plant fiber, the degradable carton is formed by splicing corrugated boards, and the corrugated boards are prepared from, by mass, 45-60 parts of the modified plant fiber, 25-35 parts of paper pulp, 5-10 parts of a biodegradable adhesive, 5-15 parts of filler, 1-5 parts of a reinforcing agent, 0.5-3 parts of a waterproof agent and 90-110 parts of deionized water. Through synergistic modification of alkali treatment and an exclusive interface coupling agent, hydrophilic hydroxyl groups on the surfaces of the natural plant fibers are effectively hydrophobized, and the interface compatibility and dispersion uniformity between the fibers and a paper pulp matrix are remarkably improved, so that the overall compressive strength and structural stability of the carton are greatly improved; the problem that the mechanical property is reduced due to direct use of natural plant fibers is solved.

This invention discloses a dual-mode synergistic composite photocatalyst, its preparation method, and its application in styrene-acrylic emulsion coating compositions, belonging to the field of architectural coating technology. The dual-mode synergistic composite photocatalyst possesses a TiO2@dense SiO2@mesoporous SiO2-MnO2-GQDs three-layer core-shell structure. The styrene-acrylic emulsion coating provided by this invention utilizes the aforementioned dual-mode synergistic composite photocatalyst, and innovatively employs a yellowing-resistant composition composed of hollow titanium dioxide-supported phenyltriazole particles, a sulfonic acid-grafted hindered amine light stabilizer, and nano-zinc oxide. This composition synergistically inhibits yellowing of the paint film through enhanced UV absorption and improved interfacial compatibility. The styrene-acrylic emulsion coating provided by this invention successfully solves the two major problems of traditional photocatalytic coatings: "purification depends on light" and "self-catalysis leads to yellowing of the paint film." It can efficiently degrade formaldehyde under both light and dark conditions and exhibits excellent yellowing resistance.

This invention belongs to the field of solid-state electrolyte technology, specifically relating to a high-pressure resistant composite polymer solid-state electrolyte, its preparation method, and its application. The solid-state electrolyte comprises: a high-pressure resistant terpolymer, a PVDF-based polymer, mullite filler, and a lithium salt; the high-pressure resistant terpolymer is prepared from a high-pressure resistant additive, a crosslinking agent, ethylene ethylene carbonate monomer, and an initiator; the high-pressure resistant additive is selected from at least one of propylene-1,3-sulfonyl lactone, cyclobutene sulfone, and 3-methyl-3-cyclobutene sulfone. The preparation method is as follows: the high-pressure resistant additive, crosslinking agent, initiator, lithium salt, and ethylene ethylene carbonate monomer are mixed to obtain a precursor solution; the PVDF-based polymer and mullite filler are stirred and mixed in a solvent, coated into a film, and vacuum dried to obtain a base film; the base film is immersed in the precursor solution, and after immersion, it is cured to obtain the high-pressure resistant composite polymer solid-state electrolyte.

The invention relates to the technical field of coatings, and discloses a high-simulation-touch wood-grain-like aluminum veneer and a preparation method thereof. Comprising the following operation steps that an aluminum veneer is subjected to acid pickling, water washing and drying; coating silica sol, and performing semi-curing to form a transition layer; coating a layer of heat insulation coating on the surface of the transition layer, and performing primary curing to form a heat insulation layer; and then carrying out thermal transfer printing and secondary curing to form a wood-grain-like layer, so as to obtain the wood-grain-like aluminum veneer. According to the scheme, silica sol is used as a transition layer, modified polyurethane is introduced into the silica sol and the heat insulation coating, and the interface bonding force between the two layers is further improved through the synergistic cross-linking effect between molecules; the thermal insulation layer can effectively reduce the thermal conductivity of the aluminum veneer, so that the duration time of ice-cold feeling during touch is shortened, and the use comfort is improved.

The invention relates to the technical field of building energy conservation, heat preservation and heat insulation materials, and discloses a flame-retardant phase-change heat preservation and heat insulation building material and a preparation method thereof.The preparation method of the flame-retardant phase-change heat preservation and heat insulation building material comprises the following steps that paraffin is loaded in ZnO / CuO hollow microspheres to obtain phase-change microspheres; modifying the phase change microspheres with polydopamine and acryloyl chloride to obtain functionalized phase change microspheres; the preparation method comprises the following steps: carrying out graft polymerization on a phosphorus-containing eugenol compound and 1-amino-5-hexene-2-alcohol on the functionalized phase change microspheres to obtain multifunctional phase change microspheres; polyether polyol, functionalized polyol, myricetin, multifunctional phase-change microspheres and the like are used as raw materials, foaming is performed, and the flame-retardant phase-change heat-preservation and heat-insulation building material is obtained. The flame-retardant phase-change heat-preservation and heat-insulation building material is excellent in heat-preservation and heat-insulation performance, flame-retardant performance and mechanical performance, has anti-ultraviolet performance and antibacterial and mildew-proof performance, can reduce erosion damage caused by external conditions, and prolongs the service life.

The application discloses an impact-resistant high-thermal-conductivity polyphenylene sulfide composite material and a preparation method thereof, and relates to the technical field of plastic processing. The preparation method comprises the following steps: S1, preparation of a highly oriented PPS fiber insert; and S2, preparation of the impact-resistant high-thermal-conductivity PPS composite material. The application provides an impact-resistant high-thermal-conductivity PPS composite material and a preparation method thereof. Firstly, the viscoelasticity of PPS resin is improved by using high-melt-viscosity and high-temperature-resistant aromatic polyamide, the interfacial compatibility of PPS / aromatic polyamide is enhanced by using a functionalized polysulfone-based resin as a compatibilizer, so that the stretchability and the tensile orientation degree of PPS are improved; PPS composite fibers are obtained by using a melt spinning machine, and a fiber solid-phase high-multiple-stretching-annealing forming process is established, so that the high-toughness and highly oriented PPS composite fiber material is obtained.

This invention discloses a hydrocolloid material containing guaiac, its preparation method, and its application, belonging to the field of medical care materials technology. It includes a backing layer and a hydrocolloid functional layer. The hydrophobic elastomer matrix comprises polyisobutylene, styrene-isoprene-styrene block copolymer, tackifying resin, liquid paraffin, and optionally caprylic / capric triglycerides. The pre-wetted hydrophilic absorbent powder comprises sodium carboxymethyl cellulose, pectin, gelatin, calcium alginate, sodium alginate, and caprylic / capric triglycerides. The composite plant repair oil comprises a phellodendron amurense lipid dispersion, Lithospermum erythrorhizon-Angelica dahurica extract, borage oil, sandalwood seed oil, borneol, and DL-α-tocopherol. The guaiac nanoliposome lyophilized powder is obtained by sequentially coating a guaiac nanoliposome aqueous dispersion with quaternized chitosan and sodium hyaluronate, then adding a lyophilization protectant and freeze-drying. This invention solves the problems of poor dispersion stability, easy degradation, insufficient soothing and repairing ability of guaiac, and instability in oil-water blends.

The application relates to the technical field of interface compatilizer, and discloses a preparation method and application of an amphiphilic lignin interface compatilizer. The preparation method of the amphiphilic lignin interface compatilizer comprises the following steps: taking lignin and alcohol compounds to react, cooling to room temperature after the reaction is completed, dropping the reaction product into deionized water with a pH of 2-7, stirring for 10-60 min, centrifuging, washing, collecting the solid, and freeze-drying for 24-96 h to obtain the amphiphilic lignin interface compatilizer. The preparation method and application of the above amphiphilic lignin interface compatilizer can significantly improve the interface compatibility between two-phase polymers, and further improve the mechanical property and barrier property of a composite film, so that the composite film can be used in the fields of mulching film, back heart bag, packaging bag, preservative film and the like.

The invention discloses a dynamic self-repairing PI-based nano protective coating for a crease-free folding screen. The dynamic self-repairing PI-based nano protective coating is prepared from a polyimide matrix, a dynamic cross-linking agent, self-repairing microcapsules, a surface-modified nano inorganic filler and a surface energy regulator, the polyimide matrix is obtained by polymerizing aromatic dianhydride and a diamine monomer containing a flexible chain segment, and the flexible chain segment comprises an ether bond or a methylene chain segment; the shell material of the self-repairing microcapsule is polyurea or polyurethane, and the core material of the self-repairing microcapsule is a polyimide repairing agent; the surface modified nano inorganic filler is SiO2 or Al2O3 nano particles subjected to surface grafting modification by a silane coupling agent. The preparation method has the beneficial effects that the coating prepared by the preparation method simultaneously realizes the basic performances of high hardness, high toughness, high light transmittance and strong adhesion, has the efficient grading self-repairing capability aiming at damages of different scales, and finally passes more than one hundred thousand times of extreme bending fatigue tests; the problems of balance of multi-performance requirements, single repair mechanism and low efficiency in the prior art are solved.

This invention discloses a high-performance vitrified microsphere composite polystyrene particle insulation board and its preparation method, comprising the following steps: premixing hydrophobic vitrified microspheres and expandable polystyrene particles coated with expanded graphite at a mass ratio of (2.5~4):1 to obtain composite lightweight aggregate. The insulation board prepared by this invention, with a dry density of only 184-193 kg / m³, exhibits a compressive strength as high as 0.275-0.302 MPa, significantly superior to traditional inorganic insulation boards (0.15-0.25 MPa) and organic insulation boards (0.10-0.15 MPa); its thermal conductivity is as low as 0.034-0.041 W / (m·K), and its insulation efficiency is more than 40% higher than that of traditional inorganic materials, while also possessing Class A fire safety performance; furthermore, the process is simple and controllable, with an industrial solid waste utilization rate of up to 70%, demonstrating significant economic benefits and environmental value, and possessing broad prospects for widespread application.

This invention discloses a method for preparing and applying an antibacterial composite coating based on quaternized zinc oxide nanoparticles. The preparation method includes: grafting quaternary ammonium salt compounds onto the surface of zinc oxide nanoparticles to prepare synergistic antibacterial nanoparticles; modifying the substrate surface by co-deposition of dopamine and polyethyleneimine to introduce active functional groups; and spraying or dipping the quaternized zinc oxide nanoparticles onto the modified substrate surface to obtain the antibacterial composite coating. This novel antibacterial material preparation scheme can integrate the advantages of zinc oxide nanoparticles and quaternary ammonium salts, while solving key technical problems such as nanoparticle aggregation, weak interfacial bonding, and limited antibacterial efficiency. It is of great significance for promoting the upgrading of hygiene and safety in the fields of medicine, food, and building materials.

The application discloses a high-temperature-resistant rubber cable and belongs to the technical field of cables.The high-temperature-resistant rubber cable comprises a core, an insulation layer and a sheath layer from inside to outside; wherein the raw material of the sheath layer comprises the following components: methyl vinyl silicone rubber, linear low-density polyethylene, a cross-linking agent, modified CeO2, an antioxidant and a lubricant.The application chemically grafts CeO2 by designing a multifunctional modifier, significantly improves the dispersity and interface bonding strength of the filler in the rubber matrix, improves the sheath tensile strength while maintaining good flexibility, and cooperatively endows the cable with excellent flame-retardant performance and high-temperature thermal stability.

The invention relates to the technical field of building waterproof composite materials, in particular to an organic silicon modified resin building waterproof composite material and a preparation method thereof. Comprising a waterproof roll and a waterproof coating arranged on the surface of the waterproof roll, the waterproof coating is prepared from the following components in parts by weight: 20 to 32 parts of silane modified polyether, 15 to 30 parts of organic silicon modified resin, 5 to 10 parts of polysaccharide-based composite polylactic acid, 8 to 12 parts of plasticizer, 1 to 3 parts of curing agent, 0.5 to 2 parts of titanium dioxide and 0.5 to 3 parts of water removal agent. An organic silicon structure in the prepared waterproof composite material has the characteristic of low surface energy, so that the surface of a coating presents strong hydrophobicity, and liquid water permeation is effectively blocked; the waterproof coating can be matched with a compact cross-linked network structure to form a continuous and seamless waterproof film, realizes high hydrostatic pressure resistance and low water absorption, and is suitable for key waterproof parts such as roofs, basements and toilets.

The application relates to the technical field of polyolefins, and discloses a coordination precipitation polymerization method for olefin polymerization and a polyolefin, the method comprising mixing olefin monomers, a catalyst and an additive, and performing a polymerization reaction; the olefin monomers contain nonpolar monomers and polar monomers, the nonpolar monomers are selected from one or more than two of ethylene, alpha-olefins and internal olefins, and the polar monomers are selected from one or more than two of enol, unsaturated carboxylic acids and unsaturated carboxylic acid esters; and the catalyst is selected from a post-transition metal complex shown in formula (I). The application can eliminate the catalyst loading process, realize olefin homogeneous catalyst polymerization self-forming, and prepare polyolefins with good particle morphology.

The invention discloses a viscosity modified material for keeping the homogeneity of self-compacting concrete, a preparation method and application. The material comprises the following components in parts by mass: fly ash, slag powder, metakaolin, cellulose ether, limestone powder, zeolite powder, an air entraining agent, a functional component A and a functional component B, wherein the functional component A is prepared by compounding and drying nano silica fume, modified carbon nanotubes subjected to ultrasonic dispersion by sodium dodecyl benzene sulfonate / absolute ethyl alcohol and tungsten disulfide subjected to activation-silanization-polycarboxylic acid modification treatment, and the functional component B is prepared by shearing and uniformly mixing magnesium oxide and a calcium expanding agent at a high speed. The material can improve the viscosity, delay segregation and bleeding and reduce the water use sensitivity under the condition that the yield stress is not obviously improved, meanwhile, the early strength development is promoted, the volume stability is improved, and the durability such as chloride ion permeation resistance is improved, so that the homogeneity and quality consistency of a component in the pouring process and after hardening are guaranteed.

This invention discloses an environmentally friendly plasticizer using modified lignin as a carrier, a rubber composition, and a method for preparing the same, relating to the field of rubber processing technology. The environmentally friendly plasticizer using modified lignin as a carrier, by weight, comprises the following components: 50 parts modified lignin, 25 parts plasticizing active ingredient, 8 parts dispersant, 5 parts anti-aging agent, and 3 parts stabilizer. The modified lignin is a lignin oligomer containing ester, acetyl, and ether cross-linked structures, with a weight-average molecular weight of 800-1200 Da, a dispersion coefficient ≤1.5, and a carboxyl content ≤0.2 mmol / g. This invention successfully overcomes the technical defects of existing plasticizer carriers, such as high toxicity, difficulty in degradation, and poor compatibility with polymer matrices, providing an environmentally friendly plasticizer using modified lignin as a carrier. This technical solution achieves the dual goals of high-value utilization of lignin and greening of the plasticizer product.