72 results about "Polysilane" patented technology

The present invention relates to the technical field of coatings, and provides a double-layer coating and a preparation method therefor and a use thereof. The double-layer coating comprises a base layer coating and a top layer coating; the base layer coating comprises a ceramic precursor and a resin, the ceramic precursor is composed of a polysilane compound and a metal precursor, the polysilane compound is selected from one or more of polycarbosilane, polyborosilazane, and polysilicon boron carbon nitrogen, and the metal precursor is selected from one or more of a zirconium precursor, an aluminum precursor, and a titanium precursor. The base layer coating of the present invention uses a copolymerization product obtained by reaction of a ceramic precursor with a resin as a main resin, and the ceramic precursor is composed of a specific polysilane compound and a metal precursor, so that low-adhesion performance on a material surface is achieved, thus effectively preventing scale formation, improving the anti-corrosion performance, and reducing the energy consumption.

The invention relates to the technical field of coatings, and provides a double-layer coating and a preparation method and application thereof.The double-layer coating comprises a prime coating and a surface coating, the prime coating comprises a ceramic precursor and resin, the ceramic precursor is composed of a polysilane compound and a metal precursor, and the resin is composed of a polysilane compound and a metal precursor; the polysilane compound is selected from one or more of polycarbosilane, polyborosilazane and polysilicon-boron-carbon-nitrogen, and the metal precursor is selected from one or more of a zirconium precursor, an aluminum precursor and a titanium precursor. According to the prime paint, the copolymerization product obtained through reaction of the ceramic precursor and the resin serves as matrix resin, the ceramic precursor is composed of the specific polysilane compound and the metal precursor, the low adhesion performance of the material surface is achieved, therefore, water scale is effectively prevented from being generated, meanwhile, the anti-corrosion performance can be improved, and energy consumption can be reduced.

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 provides a ceramic precursor and a preparation method thereof, and relates to the technical field of ceramic materials.The preparation method comprises the steps that 1, a system containing metal lithium and a first organic solvent is placed in an ice salt bath, then dimethyl phenyl chlorosilane and methyl phenyl dichlorosilane are dropwise added into the system in sequence for a reaction, and a reaction product is obtained; adding triphenyl pentamethyl trisilane to obtain triphenyl pentamethyl trisilane; (2) triphenylpentamethyltrisilane and a chlorinating agent are added into a second organic solvent for a substitution reaction, and trichloropentamethyltrisilane is obtained; (3) adding trichloropentamethylpropyl silane into a second organic solvent, uniformly mixing, and then adding metal sodium to carry out coupling reaction, so as to obtain hyperbranched polysilane; and cracking the hyperbranched polysilane to obtain a ceramic precursor. The ceramic precursor provided by the scheme has a hyperbranched structure, is narrow in molecular weight distribution and excellent in solubility, does not need complex or expensive equipment, and is higher in yield.

The application provides a catalyst and a preparation method and application thereof, relates to the technical field of catalysts, and comprises the following steps: (1) dispersing carbon nanospheres in a solvent, then adding tetrabutyl titanate and an ethanol aqueous solution, uniformly mixing, obtaining titanium dioxide coated carbon nanospheres, and through calcination, obtaining titanium dioxide hollow spheres; (2) dispersing the titanium dioxide hollow spheres in a solvent, adding silica nanoparticles, uniformly mixing, obtaining silica coated hollow spheres, and through calcination, obtaining a carrier; (3) immersing the carrier in a mixed solution containing chloroplatinic acid and nickel nitrate, obtaining a precursor solution; after the precursor solution is sequentially subjected to filtration, drying and a reduction reaction, the catalyst is obtained; and the mass ratio of Pt to Ni in the mixed solution is (1-2):(1-2). The catalyst provided by the scheme can reduce the cracking temperature in the cracking process of polysilane, further shorten the reaction time, and has low catalyst cost and good stability.

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.

This invention discloses a PE film and its preparation method, belonging to the field of polymer materials technology. The prepared PE film comprises a three-layer structure from top to bottom: a hydrophobic antibacterial upper layer, an oleophobic antibacterial layer, and a hydrophobic antibacterial lower layer. The raw materials for the hydrophobic antibacterial upper / lower layer include: 80-100 parts of polyethylene resin, 3-12 parts of organic antibacterial agent, 8-20 parts of modified shell powder, and 10-25 parts of polysilane hydrophobic agent. The raw materials for the oleophobic antibacterial layer include: 80-100 parts of polyethylene resin, 3-12 parts of organic antibacterial agent, 8-20 parts of modified shell powder, and 8-20 parts of modified chitosan. The combination of the good antibacterial activity of modified shell powder and modified chitosan improves the antibacterial performance of the PE film. Furthermore, the three-layer structure achieves hydrophobic and antibacterial properties on both the upper and lower surfaces of the film. In the oleophobic antibacterial layer, the macromolecular chains of modified chitosan are intertwined with the molecular chains of polyethylene resin, forming a denser film structure that prevents grease penetration.

The invention discloses a paint dipping method and system for an environment-friendly nano coating of a steel plate radiator, and relates to the technical field of coating processes and surface functional materials.The paint dipping method comprises the following steps that the surface of the radiator is activated, specifically, oil is removed through ultrasonic cleaning, and the surface of steel is activated through plasma micro-etching; meanwhile, spraying nano stripping liquid to form hydroxyl / carboxyl functional groups, and constructing an active interface; the preparation method comprises the following steps: constructing core-shell nanoparticles taking nano SiO as a core and polysilane as a shell, adding nano ZnO and a polycarboxylic acid dispersing agent with pH response into the coating, and determining a stable water-based nano dispersion system. The coating surface uniformity and the coating thickness are accurately monitored through near-infrared image recognition and a laser thickness measuring sensor, coating parameters are optimized in real time through an intelligent feedback control system, the stability of the coating quality is improved, automatic and intelligent quality control is achieved, and the coating quality is improved. And the coating effect of each batch of products reaches the expected standard.

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.

A polysilane methacrylic polymer and processes of preparing the polysilane methacrylic polymer are provided.

The invention discloses a high-performance AGM separator and a preparation method thereof, and belongs to the technical field of lead-acid battery manufacturing. The high-performance AGM separator comprises the following raw materials in percentage by weight: 95%-99% of modified glass fibers, 0.9%-4% of polytrimethylene terephthalate fibers and 0.1%-1% of a compatilizer, the modified glass fiber is epoxy group modified glass fiber, and the compatilizer is hyperbranched polysilane containing amino, sulfonic acid group and quaternary ammonium salt group. The preparation method of the separator comprises the following steps: mixing the modified glass fiber, the polytrimethylene terephthalate fiber and the compatilizer, pulping, proportioning, deslagging, papermaking, drying, rolling and slitting to obtain the AGM separator. The separator prepared by the method has excellent strength and liquid absorbency.

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).

The invention discloses an environment-friendly antibacterial plant-based fabric and a preparation method thereof, and belongs to the technical field of textiles. The environment-friendly antibacterial plant-based fabric is obtained by blending and weaving mint fibers, modal fibers and anti-mosquito linen fibers, the anti-mosquito linen fiber is prepared from the following raw material components: a wormwood extracting solution, modified aluminum nitride, a dispersing agent and linen fiber, wherein the modified aluminum nitride is obtained by coating modified aluminum nitride with a polysiloxane coupling agent; the polysilane coupling agent is obtained by polymerizing furfural disiloxane and hydroxyl polyethylene glycol triethoxy silane; the dispersing agent is obtained by mixing and reacting coconut oil, 3-dimethylaminopropylamine, 2-hydroxy-4-aminoacetophenone and aluminoacetic acid.

The application belongs to the technical field of material surface functionalization protection, and particularly discloses a preparation method of a polymer precursor derived all-inorganic super-hydrophobic coating, which comprises the following steps: preparing metal, glass and ceramic with micro-nano surface structure by micro-arc oxidation and hydrothermal method; adding polysilane precursor, ethyl silicate and dibutyltin dilaurate complex catalyst into n-hexane or n-heptane to configure a precursor solution; and immersing the material with micro-nano surface structure into the solution; and placing the material coated with the precursor into a high-temperature furnace to obtain the all-inorganic super-hydrophobic coating under a non-oxygen environment. The preparation method of the polymer precursor derived all-inorganic super-hydrophobic coating is safe, environmentally friendly, practical, simple to operate, and strong in designability, and can realize the all-inorganic super-hydrophobic coating on the surface of metal, glass and ceramic materials, and has excellent high-temperature resistance, wear resistance, corrosion resistance, waterproofness and self-cleaning performance.

Methods of preparing trans-silacycloheptenes and their use in preparing polymers thereof under ring-opening metathesis polymerization (ROMP) conditions are disclosed. Also disclosed are methods for preparing oligosilane diene monomers and their use in preparing unsaturated poly(carbooligosilane)s via acyclic diene metathesis polycondensation. The alkene moieties of the unsaturated poly(carbooligosilane)s can be converted to epoxides via post-polymerization epoxidation.

The application discloses a kind of crosslinking strategy construction polymer conversion wave-absorbing ceramic and its preparation method and application, belong to ceramic technical field, solve the problem of uneven dispersion of material caused by the preparation method in the prior art.The method comprises the following steps: the hyperbranched polyborosilazane precursor containing silicon-hydrogen bond and poly(diacetylene) dimethylsilane containing alkyne group are uniformly dissolved in anhydrous tetrahydrofuran according to the mass ratio of 5-20:1, platinum (0) -1,3-divinyl-1,1,3,3-tetramethyldisiloxane is added, and the anhydrous tetrahydrofuran is removed after overnight reaction at 45-60℃ temperature condition, to obtain a polymer precursor;The polymer precursor is crosslinked at 400℃, ground into powder, pressed into embryo and pyrolyzed at 1400℃, to obtain a polymer conversion wave-absorbing ceramic.The preparation method provided by the application uniformly mixes and crosslinks two kinds of polysilane at the molecular level to obtain a new polymer precursor, and pyrolyzes at high temperature to prepare a wave-absorbing ceramic with uniform dispersion of structural components, achieving a more stable effect.

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 invention discloses a continuous polymerization method for preparing rare earth butadiene rubber, and belongs to the technical field of high polymer material synthesis. The polymerization method comprises the following steps: preparation of a neodymium complex catalyst system, preparation of a long-chain alkane modified polysilane dispersant and continuous polymerization of rare earth butadiene rubber. The preparation method comprises the following steps: firstly, preparing an indole ligand by using reactive hydrogen on indole, replacing the indole ligand with neodymium chloride to obtain a neodymium complex catalyst, and synergistically constructing a high-stability cis-oriented bimetallic active center with a cocatalyst and a stabilizer, thereby breaking through 99% of the cis-structure limit. The preparation of the long-chain alkane modified polysilane dispersing agent is realized through hydrosilylation reaction, a continuous solvent polymerization process is combined, the chain entanglement degree is remarkably reduced, the system viscosity is reduced compared with that of a traditional process, a catalyst is added in a gradient manner, a high activity center is ensured in the whole polymerization process, the monomer is ensured to be inserted in an ultrahigh stereoregularity manner, and the preparation method has the advantages that the preparation process is simple, and the preparation cost is low. And ultrahigh cis-polymerization of butadiene is realized.

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 discloses a super-long carbon nanotube-silicon nitride composite material and a preparation method and application thereof.The method comprises the steps that polysilazane, acetone and ferrocene are mixed and cured, and a sample A is formed; grinding the sample A into powder, and spreading the powder on the surface of carbon paper for heat treatment to obtain a silicon nitride nanowire film; placing the silicon nitride nanowire film in a deposition furnace, and introducing nitrogen and natural gas for reaction to obtain a silicon nitride nanowire film coated with a carbon layer on the surface; and placing the silicon nitride nanowire film coated with the carbon layer on the surface in a chemical vapor deposition furnace, injecting a mixed solution of ferrocene, ethanol and ethidene diamine, and reacting to prepare the super-long carbon nanotube-silicon nitride composite material. According to the method, the carbon layer is constructed on the surface of the silicon nitride nanowire, the surface structure of the silicon nitride nanowire is improved, the reaction activity of the substrate is improved, a proper nucleation site is provided for promoting rapid generation of the carbon nanotube, and then the super-long carbon nanotube is rapidly constructed on the surface of the silicon nitride nanowire through chemical vapor infiltration.

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.

A polysilane methacrylic polymer and processes of preparing the polysilane methacrylic polymer are provided.

The invention relates to a non-aqueous electrolyte additive composition of a secondary battery, in particular to an additive composition for inhibiting electrolyte discoloration and acid value increase and a secondary battery electrolyte containing the additive composition. The non-aqueous electrolyte comprises an electrolyte salt, a non-aqueous organic solvent and an additive composition, wherein the additive composition comprises a polysilane additive and a phosphite additive. The polysilane additive and the phosphite additive are combined for use, so that the problem that the chromaticity and the acid value of the electrolyte are increased in the processes of transportation or storage and the like can be well inhibited, and the color of the electrolyte is changed and the acid value is increased in the presence of additives containing sulfate esters such as DTD, sulfonate esters such as MMDS and the like which are easy to cause color change of the electrolyte and increase of the acid value. And the increase of chromaticity and acid value can be well inhibited, and the transportation and storage cost of the electrolyte is reduced.

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.

A method for producing a cyclic silane compound includes a step for obtaining a cyclic silane compound by subjecting a linear polysilane to a decomposition conversion reaction in a solution containing a solvent containing at least one of a cyclic ether solvent and an aromatic hydrocarbon solvent, metallic sodium, a polycyclic aromatic compound or a polyphenyl hydrocarbon, a polyether compound represented by formula (I) or (II) and the linear polysilane compound. The amount of the linear polysilane used in the solution is more than 6.0 g relative to 100 mL of the solvent.

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.