28 results about "Polysilane" patented technology

The invention belongs to the technical field of coating preparation, and provides a modified polysilane epoxy hybrid coating and a preparation method thereof. Firstly, a polyrotaxane silane additive containing cyclic molecules is prepared through a supramolecular self-assembly and chemical end capping technology, the additive forms a unique network after a coating is cured, mechanical stress can be effectively dissipated, and the coating is endowed with ductility; secondly, a controllable free radical polymerization method is adopted, an acrylate copolymer is synthesized, dynamic hydrogen bond units densely distributed on a side chain of the acrylate copolymer form an efficient energy absorption network, and impact energy can be absorbed and dissipated on the microscopic level; in the preparation process of the coating, the epoxy resin, the copolymer and the pigment filler are finely ground and then mixed with auxiliaries such as polyrotaxane silane to prepare a component A; and mixing amino silicon oil with an amine curing agent and a catalyst to prepare a component B. The prepared coating has excellent flexibility and impact resistance while keeping high weather resistance.

[Problem] To provide a stabilizer for suppressing generation of silane from a polysilane composition and a method for suppressing generation of silane. To provide a method for inactivating a polysilane, and a polysilane inactivated treatment composition.[Means for Solution] A stabilizer represented by the following formula for suppressing generation of silane from a polysilane composition: CH2═CH—R1 wherein R1 is C3-20 linear, branched or cyclic alkyl group, C2-15 linear or branched alkenyl group or C7-20 aryl group substituted with alkenyl group.[Selected Drawing] None

The invention belongs to the technical field of adhesives for PCBs (printed circuit boards), and particularly relates to a phosphorus-silicon synergistic flame-retardant UV-moisture dual-curing three-proofing adhesive. The phosphorus-silicon synergistic flame-retardant UV-moisture dual-curing three-proofing adhesive provided by the invention is mainly prepared from a poly-UV-silane moisture dual-curing polyurethane acrylate prepolymer, a photoinitiator, an active diluting monomer, a wetting leveling agent, a defoaming agent and fluorescent powder. The phosphorus-silicon synergistic flame-retardant UV-moisture dual-curing three-proofing glue prepared by the invention has the characteristics of excellent flame retardance and flame spread prevention on the basis of moisture-proof, salt mist-proof and mildew-proof functions. When a fire source exists outside, the material can effectively inhibit self-combustion, or can be automatically extinguished after the fire source is removed, can provide higher-grade safety guarantee for electronic equipment, and can be widely applied to the fields of electronic components, household appliances, automotive electronics, charging piles and the like.

This method for producing a cyclic silane compound comprises: a first step for obtaining a reaction solution containing a chain polysilane compound by subjecting a silane compound to a polymerization reaction in a mixture containing metallic sodium and an aromatic hydrocarbon-based solvent; and a second step for obtaining a cyclic silane compound by subjecting the chain polysilane compound to a decomposition reaction in a solution obtained by mixing the reaction solution with tetrahydrofuran and a polycyclic aromatic hydrocarbon or a polyphenyl hydrocarbon.

The application discloses a modified polysilane-polysiloxane body type crosslinking copolymer scintillator and a preparation method thereof. The crosslinking copolymer scintillator is a body type crosslinking structure formed by crosslinking of modified polymethylhydrosilane and polymethylphenylsiloxane. In the application, a scintillation group with 2-3 aromatic rings is introduced into a Si-Si main chain through a Grignard reaction, so that an original sigma conjugated system is expanded into a sigma-pi and sigma-pi conjugated system. Correspondingly, introduced pi electrons and lone pair electrons (n electrons) are converted into pi to sigma transition and pi to n to sigma transition, so that the energy gap width is changed, and the fluorescence emission spectrum of the polysilane becomes adjustable. After modification, the conjugated system is expanded, and the intermolecular electron transfer is improved, so that the fluorescence intensity and the quantum yield of the polysilane are improved. The fluorescence intensity of the modified scintillation group is 20-40 times higher than that of the unmodified polysilane-polysiloxane crosslinking copolymer.

This method for producing a cyclic silane compound comprises a step for obtaining a cyclic silane compound by subjecting a chain polysilane compound having a repeating unit represented by formula (1), which is not completely dissolved in 1-chloronaphthalene at a temperature of 240 DEG C or less, to a decomposition reaction in a solution containing sodium metal and a lithium salt. (In the formula, R1 and R2 each independently represent a hydrogen atom or a hydrocarbon group).

This invention belongs to the field of coating technology, specifically relating to a linear high-polysilane-reinforced wear-resistant antireflective coating and its preparation method. Using tetraethyl orthosilicate and methyltriethoxysilane / methyltrimethoxysilane as co-precursors, an alkaline network silica sol is synthesized under alkaline conditions via a sol-gel method. Using poly(methylhydrosiloxane) as the silicon source, a linear high-polysiloxane sol is synthesized under the action of a catalyst. The two silica sols are then mixed, aged, and ammonia-removed to obtain a neutral mixed sol. A double-sided antireflective coating is then deposited on a borosilicate glass surface using an dip-coating method. Finally, the coating is calcined in a muffle furnace at 550°C for 2 hours to obtain the wear-resistant antireflective coating. The prepared antireflective coating exhibits high transmittance and good wear resistance. The preparation process avoids the use of acid, preventing corrosion of production equipment and environmental pollution, making the production operation green and environmentally friendly.

The utility model discloses a polysilane catalytic conversion device with product separation function relates to the field of polysilane. This polysilane catalytic conversion device with product separation function, including catalytic furnace, the inside intermediate position of catalytic furnace is provided with material adding subassembly, and the bottom of catalytic furnace is provided with product separation subassembly. This polysilane catalytic conversion device with product separation function, hollow shaft is rotated under the action of transmission shaft and drive mechanism, under the rotation of hollow shaft, the catalytic liquid in hollow shaft is sprayed into catalytic furnace, and the material in catalytic furnace is mixed, and the mixing effect of catalytic liquid and material is improved. The filter screen is used for intercepting the unreacted material and catalyst particles, and only allows the product liquid after reaction to pass through. The collection tank is used for temporarily storing the product liquid after separation. The product liquid in the collection tank is introduced out of the catalytic furnace through the discharge pipe, and the product liquid is further treated or stored.

The application relates to the technical field of high polymer materials, and discloses a preparation method of a silica aerogel modified rubber composite material and a hose. Chlorophenyl polysilane and phenolic resin modified silica aerogel are added into silicone rubber to optimize the performance. The silica aerogel is a three-dimensional network skeleton, has high porosity, a high melting point and high temperature stability, keeps stable at high temperature, and maintains high efficient heat insulation effect for a long time; the phenolic resin contains a large number of aromatic rings and hydroxyl groups, is easy to cause dehydration, cross-linking and condensation reaction at high temperature, forms a dense, high-temperature-resistant and not-easy-to-collapse carbon layer, blocks heat transfer and prevents combustible gas diffusion, improves the carbon residue rate and the flame retardance of the material; the silicon-chlorine bond of the chlorophenyl polysilane reacts with the silica and the phenolic resin, so that the two are combined, the formed carbon layer is denser, the thermal shock resistance is stronger, the dispersity of the aerogel is improved, and the mechanical properties and the ablation performance of the silicone rubber are enhanced.

The invention relates to the technical field of chemical engineering, in particular to a preparation method and device of an inorganic fiber precursor. The embodiment of the invention provides a preparation method of an inorganic fiber precursor. The preparation method comprises the following steps: introducing inert gas into liquid polysilane in a reaction kettle; applying ultrasonic waves to the gas-liquid mixture in the reaction kettle by using a first ultrasonic device so as to generate a cavitation effect on the gas-liquid mixture; and receiving vaporized gas in the reaction kettle by using a cracking column, heating, refluxing a product obtained after the thermal polycondensation reaction, and obtaining an inorganic fiber precursor product after the reaction is finished. The embodiment of the invention provides the preparation method of the inorganic fiber precursor, which can be used for preparing the inorganic fiber precursor with low cost and high efficiency.

The present application provides a kind of organic silicon modified hyaluronic acid, modified liquid silicone elastomer and its preparation method and application;The organic silicon modified hyaluronic acid includes the following preparation raw materials: hyaluronic acid and vinyl single seal head;The modified liquid silicone elastomer preparation raw materials include the following components: (A) hyaluronic acid with olefinic unsaturated group;(B) organic polysilane with at least two olefinic unsaturated groups;(C) organic polysiloxane containing at least two SiH groups;(D) carrier fluid;(E) silicon hydrogen addition catalyst;The component (A) is the above-mentioned organic silicon modified hyaluronic acid.The present application introduces the organic silicon modified hyaluronic acid into the organic silicon elastomer segment, and obtains the organic silicon elastomer with excellent spreading, smooth feeling, no sticky wet feeling and transparency.In addition, the present application obtains the modified organic silicon elastomer gel in liquid form, which can be directly applied to various daily chemical products.

This method for producing a cyclic silane compound comprises: a first step for obtaining a reaction solution containing a chain polysilane compound by subjecting a silane compound to a polymerization reaction in a first solution containing sodium; and a second step for obtaining a cyclic silane compound by subjecting the chain polysilane compound to a decomposition conversion reaction in a second solution containing the reaction solution. In addition, a polycyclic aromatic hydrocarbon or a polyphenyl hydrocarbon is contained in the first solution or mixed with the reaction solution, and a polyether compound represented by formula (I) or formula (II) is contained in the first solution or mixed with the reaction solution.

This invention belongs to the field of coating technology, and specifically relates to an antifouling coating, its preparation method, and its application. The raw materials for preparing the antifouling coating of this invention include siloxane, polysiloxane, isocyanate, and a catalyst. Through the combined action of polysilane, siloxane, and isocyanate, this invention enables the coating to possess comprehensive properties such as good hardness, water resistance, non-stickiness, antifouling properties, adhesion, flexibility, impact resistance, abrasion resistance, high-temperature resistance, and salt water resistance.

This application discloses compositions for superlubricating coatings, superlubricating coatings, superlubricating coating components, preparation methods, and applications thereof. The compositions for superlubricating coatings include: 18 to 27 parts by weight of silica sol, 20 to 30 parts by weight of siloxane, 1 to 5 parts by weight of methoxy-terminated polysilane, and 0.1 to 0.5 parts by weight of an acidic catalyst. The compositions for superlubricating coatings of this application can collectively form a liquid-like superlubricating coating with adjustable thickness, thereby effectively improving the durability and mechanical stability of the superlubricating coating in turbulent, mechanically abrasive, and corrosive environments, and effectively improving the lubrication, non-stick, and hydrophobic properties of the superlubricating coating.

The invention provides a preparation method of fast-curing multi-silane-terminated silane modified polyether resin, which comprises the following steps: carrying out addition reaction on multi-silane-terminated alkoxy silane with a secondary amino structure and diisocyanate to obtain a silane intermediate containing an isocyanate group; and carrying out an end-capping reaction on the silane intermediate and hydroxyl-terminated polyether to obtain the silane modified polyether resin. Compared with the prior art, the invention has the following beneficial effects: 1, the environmental protection property is prominent; 2, the curing speed is high; 3, the mechanical property is excellent; 4, the viscosity adjustability is high; and 5, the application range is wide.

The invention provides a catalyst and a preparation method and application thereof, and relates to the technical field of catalysts, the method comprises the following steps: (1) dispersing carbon nanospheres in a solvent, then adding tetrabutyl titanate and an ethanol water solution, and uniformly mixing to obtain titanium dioxide coated carbon nanospheres; calcining to obtain titanium dioxide hollow spheres; (2) dispersing the titanium dioxide hollow spheres in a solvent, adding the silicon dioxide nanoparticles, and uniformly mixing to obtain silicon dioxide coated hollow spheres; calcining to obtain a carrier; (3) dipping the carrier in a mixed solution containing chloroplatinic acid and nickel nitrate to obtain a precursor solution; sequentially filtering, drying and carrying out reduction reaction on the precursor solution to obtain the catalyst; the mass ratio of Pt to Ni in the mixed solution is (1-2): (1-2). According to the catalyst provided by the scheme, the cracking temperature in the polysilane cracking process can be reduced, the reaction time is further shortened, and the catalyst is low in cost and good in stability.

The invention relates to the technical field of coatings, in particular to a multiband synergistic camouflage coating and a preparation method thereof. The invention discloses a multiband synergistic camouflage coating. The wave-absorbing coating is prepared from the following raw materials: acrylic acid modified polyurethane resin, polysilane modified epoxy resin, acrylic acid modified organic silicon resin, wave-absorbing particles, nano titanium dioxide, filler, activated boron nitride nanosheets, graphene oxide, hollow carbon microspheres, pyrrole monomers, an oxidizing agent, nano vanadium dioxide, a dispersing agent, a flatting agent, a defoaming agent, an anti-settling agent, extinction powder and trimethylolpropane tris [ 3-(2-methyl aziridinyl) propionate]. The obtained coating is good in wave absorbing effect, can realize multiband wave absorbing, has the function of reflecting solar radiation, is good in heat stability and scratch-resistant in paint film, and obviously enhances stealth stability; meanwhile, the process is simple and suitable for large-scale popularization and application.

This utility model discloses a continuous feeding device for the catalytic conversion of polysilane, relating to the field of continuous feeding technology. This continuous feeding device for the catalytic conversion of polysilane utilizes a metering pump and flow meter in tandem to precisely control the feed rate, ensuring proper ratio of reactants, improving product quality, and avoiding raw material waste. A buffer tank equipped with a pressure regulating valve stabilizes the material conveying pressure, reduces fluctuations, and achieves continuous and stable feeding. An agitator and impeller inside the storage tank prevent material sedimentation and stratification, ensuring material uniformity. A level gauge helps monitor the storage status and maintain production continuity. An electric heating belt is installed outside the feeding pipe, utilizing the electric heating belt and buffer tank to maintain stable temperature and pressure in the reaction system, reducing side reactions and improving product quality. A filter on the conveying pipe effectively removes impurities, protects the equipment, and enhances the catalytic conversion reaction effect.

The invention belongs to the technical field of polymethylsilane modification, and relates to conductive polymethylsilane as well as a preparation method and application thereof. The preparation method of the conductive polymethylsilane comprises the following steps: reacting polymethylsilane, an initiator and carbon tetrachloride, and purifying after the reaction is finished to obtain a chlorinated product; and reacting the chlorinated product with the modifier of the conjugated group and organic alkali, and after the reaction is finished, purifying to obtain the conductive polymethylsilane. According to the obtained material, the Si-Si skeleton structure of a polysilane main chain is reserved, so that the sigma conjugation characteristic of the polysilane main chain is maintained; a synergistic effect is formed between an introduced conjugated group and a main chain, so that sigma conjugation and pi conjugation in a material system are mutually coupled. The conductivity and solubility of the conductive polymethylsilane disclosed by the invention are improved, so that the application possibility of a polysilane material in related functional fields is expanded.

The invention belongs to the technical field of steel slag resource utilization, and particularly relates to a preparation method of a steel slag-based cementing material. Comprising the following steps: S1, preparing raw materials: drying and grinding steelmaking steel slag to obtain steel slag micro powder, respectively dissolving an alkaline exciting agent, a sulfate exciting agent and hydrolyzable polymerized silane in water, and mixing to obtain a composite exciting agent solution; s2, activation: performing plasma activation on the steel slag micro powder through a normal-pressure low-temperature plasma jet device in a dense-phase pneumatic conveying manner to obtain activated steel slag micro powder; and S3, preparation of a cementing material: immediately performing dry mixing on the activated steel slag micro powder and aggregate, slowly adding a composite exciting agent solution, performing vibration molding, and curing to a specified age to obtain a cementing material product. According to the method, denser and firmer anchoring points are provided for polymerized silane through plasma activation, a three-dimensional siloxane network is formed in situ through Si69, the breaking strength and toughness of the material are greatly improved, and generation and extension of microcracks are inhibited.

The application belongs to the technical field of coating preparation, and provides a modified polysilane epoxy hybrid coating and a preparation method thereof; firstly, a polyrotaxane silane additive containing a cyclic molecule is prepared through supramolecular self-assembly and chemical capping technology, the additive forms a unique network after curing of a coating, can effectively dissipate mechanical stress, and endows the coating with ductility; secondly, a controllable free radical polymerization method is used to synthesize an acrylate copolymer, and a large number of dynamic hydrogen bond units on the side chain of the copolymer constitute an efficient energy absorption network, which can absorb and dissipate impact energy at a micro level; in the coating preparation process, an epoxy resin, the copolymer and pigments and fillers are finely ground, and then mixed with polyrotaxane silane and other additives to prepare an A component; amino silicone oil is mixed with an amine curing agent and a catalyst to prepare a B component, and the prepared coating has high weather resistance, excellent flexibility and impact resistance.

To provide: a purification method of a polysilane compound, with which a metal is efficiently removed from the polysilane compound without occurrence of new metal contamination; in addition, a purification method of a polysilane compound, with which a content of a metal component is further significantly reduced from the polysilane compound having the metal component removed with a conventional method; and further a high purity polysilane compound having a significantly reduced content of the metal component.SOLUTION: A purification method of a polysilane compound at least has a preparation step to dilute a polysilane compound containing metal impurities with a compound having at least one amide group skeleton, and a metal removal step to remove the metal impurities to the outside of the system with a metal removal treatment from the diluted polysilane compound.SELECTED DRAWING: None

To provide an electrolyte composition, an electrochemical cell comprising the electrolyte composition, and a method of making the electrochemical cell.SOLUTION: An electrolyte composition contains: at least one aprotic organic solvent; at least one conducting salt including at least one lithium salt; and at least one silyl ester phosphonate comprising the structure of the formula (I) in the figure. The electrolyte composition contains the at least one silyl ester phosphonate in an amount of 0.01 to 10 mass% based on the total mass of the electrolyte composition.SELECTED DRAWING: None

The invention relates to fully-hybridized silica gel microspheres, a preparation method thereof and a chromatographic column. The method comprises the following steps: mixing polysilane with a surfactant aqueous solution to obtain a mixed solution; enabling the mixed solution to pass through a porous membrane under the pressure of 0.1 MPa to 2 MPa, so as to obtain an emulsion containing liquid drops; the aperture of the porous membrane is 1-50 [mu] m; mixing the emulsion with a basic catalyst, carrying out a curing reaction, and then carrying out solid-liquid separation to obtain solid microspheres; and mixing the solid microspheres with water, and carrying out a hydrothermal reaction under the pressure of 0.1 MPa to 2 MPa and the temperature of 100 DEG C to 200 DEG C, so as to obtain the fully-hybridized silica gel microspheres.

This invention discloses a method for preparing hyperbranched polysilane-modified phenolic resin. A hyperbranched polysilane with phenolic hydroxyl groups at the end groups is prepared by acid hydrolysis and end-group modification. This silane is then used as a silane modifier and polymerized in situ with phenol and formaldehyde to obtain hyperbranched polysilane-modified phenolic resin. This method increases the Si grafting content, thereby improving the performance of the modified phenolic resin and obtaining an organosilicon hybrid phenolic resin with excellent ablation resistance and oxidation resistance.

The present invention relates to a negative electrode for a lithium secondary battery, comprising: a negative electrode active material layer provided on at least one surface of a negative electrode current collector layer; a surface layer provided on the surface of the negative electrode active material layer; and an inner layer provided between the negative electrode active material layer and the surface layer, wherein the surface layer and the inner layer each include at least one selected from the group consisting of a polyvinyl-based polymer, a polyamide-based polymer, a polysilane-based polymer, a polyfluorene-based polymer, a polyaniline-based polymer, and combinations thereof, and the inner layer and the surface layer include polymers different from each other to suppress a thermal runaway phenomenon.

The application belongs to the technical field of calcium hydroxide preparation, and particularly relates to a preparation method of a modified calcium hydroxide desulfurizer based on functionalized graphene. The method comprises the following steps: uniformly mixing quicklime and amino-functionalized graphene, adding water, and performing digestion reaction to obtain the modified calcium hydroxide desulfurizer. In the lime digestion process, the amino-functionalized graphene is added, which on one hand promotes the uniform dispersion of calcium hydroxide particles in the two-dimensional graphene network, inhibits the agglomeration of calcium hydroxide particles, forms a steric hindrance effect of the silane branched chain, increases the specific surface area between the calcium hydroxide particles, and improves the pore size and pore volume, so that the calcium hydroxide with high specific surface area is obtained; on the other hand, the amino functional groups on the surface of the functionalized graphene provide new high-density basic sites, which can synergistically strengthen the host-guest interaction, thereby greatly improving the adsorption capacity of sulfur dioxide and the efficiency of flue gas desulfurization.

The invention discloses a preparation method of vinyltris (2-methoxyethoxy) silane, which can effectively reduce the accumulation of hydrogen chloride by adding an amino-modified ceramic filler into a reactor, and avoid the generation of polysilane by chain reaction due to the existence of a large amount of hydrogen chloride, thereby enhancing the conversion rate of esterification reaction. And a new path is provided for industrially improving the product competitiveness.