4851 results about "Triethoxysilane" patented technology

A method for gelating a co-precursor relates to an aerogel. The invention provides a method for preparing transparent silica aerogel by normal pressure drying through a co-precursor method. The method has the advantages of low cost, simple process, short production cycle, controllable reaction course and continuous production. Tetraethyl silicate and absolute ethyl alcohol are put into a container according to a proportion and stirred, and added with methyl triethoxysilane; added with water and stirred; added with hydrochloric acid to regulate the pH of the solution; added with ammonia water to regulate the pH of the system after stirring; the silica sol is kept stand still after stirring to obtain wet gel; the obtained wet gel is put into a normal hexane solution or a normal hexane solution containing the methyl triethoxysilane with volume concentration of 10%-50% for solvent exchange and aging, after being exchanged by the solution containing the methyl triethoxysilane agent, the gel is washed by the normal hexane solution to remove the methyl triethoxysilane remained on the surface of the sample, and the transparent silica aerogel is obtained by drying.

The invention relates to a preparation method of a graphene oxide/waterborne polyurethane nanometer composite material. Especially, the preparation method comprises the following steps of: utilizing gamma-aminopropyl triethoxysilane (KH550) to carry out surface modification (functionalization of graphene oxide) onto graphene oxide; lowering hydrophily of a graphene oxide sheet layer; improving dispersion of the graphene oxide sheet layer in an organic solvent and compatibility of the graphene oxide and the polymer; and utilizing an in-situ polymerization method to prepare the graphene oxide/waterborne polyurethane nanometer composite material. The preparation method of the graphene oxide/waterborne polyurethane nanometer composite material belongs to the preparation field of composite materials.

The invention relates to a functional fiber and its manufacturing method, where the functional fiber has a skin-core structure, the weight ratio of skin to core 3/7 - 7/3; and the formula of the skin materials in weight percent comprises: skin polymer 91.6-97.6%, far infrared powder 2-8%, and coupling agent 0.1-0.4%; the skin polymer is one of PTT, PBT, PA-6, PET and PP with fusion index of 25-50; the coupling agent is one of gama-shink glycerol oxy propyl trimethoxy silane, gama-methyl propylene acyl oxy trimethoxy silane, N-beta-(amido ethyl)-gama amido propyl trimethoxy silane, and gama-amido propyl triethoxy silane; and the formula of the core-layer materials in weight percent comprises: core-layer polymer 88-99%, and flavor 1-12%; wherein the core-layer polymer is one of PE, PP and PET with melting point of 150-200 deg.C. The fiber of the invention has far infrared emissivity of 81-86%, very strong spicery and is a synthetic health functional fiber.

The invention relates to the technical field of nano materials and specifically relates to amino-modified silica with dual drug-loading effects. According to the technical scheme, firstly, mesoporous silica nanoparticles are prepared by a template method; secondly, surface amino modification is carried out onto the mesoporous silica nanoparticles by 3-aminopropyltriethoxy silane; thirdly, ursolic acid is chemically coupled to the spherical mesoporous silica nanoparticles by amido bonds; and fourthly, the coupled nanoparticles are dispersed in DMF (dimethyl formamide) solution; a proper amount of ursolic acid is added, mixed and stirred; and finally vacuum drying is carried out to obtain the amino-modified silica with dual drug-loading effects. The mesoporous nano material with dual drug-loading effects prepared by the mesoporous silica disclosed by the invention is high in loading rate, can achieve controlled release effect for the loading drug ursolic acid, so that drug effect lasts for a long period time, and therefore, bioavailability of the ursolic acid is greatly improved.

The invention discloses a cold-resistant rubber cable sheath material and a preparation method. The material comprises chlorinated polyethylene, ethylene-propylene-diene monomer (EPDM) rubber, lead oxide, calcium carbonate, N-isopropyl benzene-N'-phenyl p-phenylenediamine serving as an anti-aging agent, antimonous oxide, magnesium oxide, paraffin hydrocarbon oil, chlorinated paraffin, paraffin, carbon black, settled white carbon black, talc powder, gamma-aminopropyl triethoxysilane serving as a surfactant, dicumyl peroxide serving as a vulcanizing agent and triallyl isocyanurate serving as a co-vulcanizing agent. The low temperature performance of the material is improved by blending the chlorinated polyethylene and the EPDM rubber, and meanwhile, the flame-retardant performance of the rubber sheath material is improved by synergy of the antimonous oxide serving as a flame retardant and the chlorinated paraffin; experiments show that the rubber sheath material can pass low-temperature embrittlement test of 40 DEG C below zero, has excellent low-temperature resistance, has the oxygen index of more than 32 and has good flame-retardant performance; and the preparation method is simple and strong in operability.

The invention belongs to the technical field of catalysis and relates to a method for preparing a monatomic cobalt catalyst by roasting silicon dioxide pellets and immobilizing metalloporphyrin. The method is realized by adopting the following technical scheme: namely stirring and dispersing nano silicon dioxide particles, dropwise adding 3-aminopropyl triethoxy silane, so as to obtain amino modified SiO2 pellets, then linking monocarboxyl metalloporphyrin (CoTPCPP) onto an amino modified SiO2 carrier through organic complexing, carbonizing porphyrin through high-temperature calcination in an inert atmosphere, and loading highly dispersed cobalt atoms onto the amino modified SiO2 pellets, thus an amino modified silicon dioxide pellet loaded monatomic cobalt catalyst is obtained. The monatomic dispersion catalyst has high catalytic activity and stability on a molecular oxygen selective ethylbenzene catalytic oxidation reaction in absence of solvent; meanwhile, a preparation method is simple, and product quality can be easily controlled, so that the monatomic dispersion catalyst is applicable to the fields of alkane selective oxidation reactions and synthesis of medical intermediates.

The invention relates to a bacteriostatic antistatic multifunctional non-woven fabric which is fabricated by the steps of unwinding non-woven gray fabric; applying finishing agent by using an ultrasonic foam applicator; extruding out redundant finishing agent by using a rolling mill; and then drying by using a baking oven and winding. The finishing agent includes the following components: sodium dodecyl sulfate, hydroxyethyl cellulose, nanometer silver powder, penetrating agent JFC, nano-silica, gamma-aminopropyltriethoxysilane, sorbitan ester, cetyltrimethyl ammonium chloride, methacrylic acid, beta-cyclodextrin and spices. The non-woven fabric has multiple functions of being antibacterial, anti-static, anti-ultraviolet, washing-resisting, fragrance lasting and the like. Especially the ultrasonic foam applicator is utilized to conduct foam finishing, and the finishing agent can be evenly penetrated in the fiber structure by means of the effect of ultrasonic waves, so as to lead nanometer material in the finishing agent and particles of the spices to disperse in the fabric and to be wrapped by organic matters to form a microcapsulation state, so that all functions and effects are lasting.

A process for preparing the quaternary ammonium salt of organo-silicon type bactericide includes such steps as adding anhydous sodium sulfate to absolute alcohol, stirring, dissolving dimethyl octadecalamine in it while stirring, slowly dripping gamma-chloropropyl triethoxysilane while stirring, adding catalyst, reaction to obtain the quarternary ammonium salt of organo-silicon, cooling, regulating pH=7, and adding absolute alcohol to regulate its concentration to 40%.

The invention discloses a quaternary ammonium salt modified organosilicon polyurethane ocean antifouling paint, the structure is shown as the formula (1); in the formula, an organosilicon soft segment containing quaternary ammonium salt side chain is an isocyanate hard segment; the quaternary ammonium salt modified organosilicon polyurethane ocean antifouling paint is prepared by the following steps: preparing 2,4,6-tri(3- chlorine propyl group)-2,4,6- trimethyl-ring trisiloxane; preparing 1,3-bi(3-(1-methoxy group-2-hydroxy propyl group) propyl group)-tetramethyl disiloxane; preparing 1,3-bi(3-(1-methoxy group-2-hydroxy propyl group) propyl group)-tetramethyl disiloxane; preparing dihydroxy ended chloropropylated polysiloxane; preparing polysiloxane compound containing the quaternary ammonium salt and hydroxyl; mixing the compound with the isocyanate, and adding gamma-aminopropyl triethoxy silane for chain extension to obtain a prepolymer, and the prepolymer being crosslinked and condensed in air. In the invention, the double effect of low surface energy and poison killing are achieved, so as to suppress the adsorption of marine organisms and kill bacteria adsorbed on the surface of a ship body through the quaternary ammonium salt.

The present invention pertains to a method for preparation of superhydrophobic timber on the basis of a sol-gel method, and the method is as follows: (1), silica sol synthesis, to be more specific, materials are prepared in the volume ratio of ammonia to anhydrous ethanol to ethyl orthosilicate of 1:15 to 17:1; (2), hydrophobic modification of monodispersed nano silica sol, to be more specific, hexadecyl trimethoxysilane, or triethoxysilane-1H, 1H, 2H, 2H-heptadecafluorodecyl silane is used for hydrophobic modification of the synthesized monodispersed nano silica sol, and the hydrophobic agent promotes mutual aggregation of nanoparticles to promote the formation of aggregates of silica nanoparticles; and (3) timber coating processing, to be more specific, the timber surface is coated with the hydrophobically modified silica sol solution by dipping or spraying process. Contact angles of the processed timber surface and water droplets are greater than 150 degrees, roll angles are less than 10 degrees, and a superhydrophobic film has good resistance to acid and alkali erosion and stability in high-humidity environment. The method is simple in operation, less demanding on equipment, and capable of scale production, and has wide market prospects.

The invention provides a water-based porcelain film coating. The formula of the water-based porcelain film coating comprises the following components in parts by weight: 45% to 55% of colloidal silica dispersion liquid, 30% to 45% of a silane coupling agent, 5% to 15% of an inorganic pigment, 2% to 5% of alumina packing, 0.5% to 1% of a flatting agent, 1% to 2% of hydroxy silicone oil with low molecular weight and 1% to 1.5% of an organic acid catalyst, wherein the colloidal silica dispersion liquid is prepared by mixing colloidal silica with big and small particle diameters according to the mass ratio of (1-3):1, wherein the particle diameters of the colloidal silica with the small particle diameters are distributed within 10nm to 15nm while the particle diameters of the colloidal silica with the big particle diameters are distributed within 40nm to 50nm; the silane coupling agent is prepared by mixing methyl trimethoxysilane and methyl triethoxysilane according to the mass ratio of (1-2):1; the organic acid catalyst can be a formic acid or an acetic acid or can be a mixture of the formic acid and the acetic acid. The water-based porcelain film coating has the good adhesive force and the good waterproof and cohesive-proof on an aluminum alloy substrate.

The present invention discloses a method for producing a silane modified polyurethane sealant by using secondary amino alpha-silane, which belongs to the technical field of production of silane modified polyurethane sealants. The method comprises the following steps: removing water from polyether polyol, preparing polyurethane prepolymer, synthesizing silane-terminated polyurethane prepolymer and preparing the modified polyurethane sealant, wherein in the step of synthesizing the silane-terminated polyurethane prepolymer, the used silane for termination is formed by mixing one or two kinds of compounds selected from a group of secondary amino alpha-silane such as anilino-methyl-triethoxy silane, amine formic acid methyl trimethoxy silane or amine formic acid methyl methyl dimethoxy silane; in the step of preparing the modified polyurethane sealant, a catalyst used in the step is formed by mixing one or two kinds of compounds selected from a group of metal zirconate titanate compounds such as tetra-tert-butyl orthotitanate, tetraisopropyl titanate, tetrabutyl titanate and zirconium n-butoxide. The termination process of the prepolymer is simple, and the silane modified polyurethane sealant produced by the method has fast curing speed.

The durability of a bonded aluminium alloy and/or Alclad (Trade Mark) material joint can be improved by a two stage pre-treatment process in which after the surfaces to be joined have been degreased, a first solution BTESE and/or BTMSE in water, with or without methanol and/or ethanol, is applied to the degreased surfaces dried and coated with a second solution of gamma-glycidoxypropyltrimethoxysilane, an amino silane, gamma-aminopropyltriethoxysilane and/or trimethoxyvinylsilane in water with or without methanol and/or ethanol and drying prior to the application of an epoxy adhesive coating to the dried second solution surfaces, bonding and curing.

The invention discloses an ultraviolet curing reaction-based fluoride-free and water-repellent finishing method of cotton fabric. The method comprises the steps of putting the cotton fabric into 3-mercaptopropyl triethoxysilane ethyl acetate solution and carrying out mercapto modification to obtain pretreated cotton fabric; dipping the cotton fabric subjected to mercapto modification into vinyl polyhedral oligomeric silsesquioxane solution, and obtaining the fluoride-free and water-repellent cotton fabric, which has a surface with an approximate super-hydrophobic effect, under the ultraviolet curing condition. The reaction is based on the principle of click chemistry, so that a static contact angle is basically remained unchanged after soaping treatment is carried out. Furthermore, according to a test method of AATCC 22-2005 waterproof spray test, the waterproof spray test score of the cotton fabric subjected to water-repellent finishing reaches 95. The ultraviolet curing reaction-based fluoride-free and water-repellent finishing method of the cotton fabric is simple in operation and high in efficiency, obvious in water-repellent effect under the condition that a finishing agent is fluoride-free, and high in finishing washing fastness.

The invention discloses an anti-crocking rubber sole and relates to a rubber sole. The invention provides the anti-crocking rubber sole with low production cost, long service life, ageing resistance and no crocking and a method for manufacturing the same. Raw materials comprise A and B; the raw material A comprises 72.9 percent of cis-1,4-polybutadiene rubber, 20.2 percent of caoutchouc, 6.9 percent of styrene-butadiene rubber, 44.5 percent of precipitated hydrated silicon dioxide, 0.8 percent of bi-(3- propyl triethoxysilane)- tetrasulfide, 5.3 percent of zinc oxide, 3.5 to 4.5 percent of polyethylene glycol, 1.0 to 2.0 percent of stearic acid, 1.1 percent of rubber viscosity increaser, 0.8 percent of activating agent, 0.3 to 0.6 percent of phenolic antioxidant, 0.4 percent of tackifying resin and 1.0 percent of antifogging agent; the raw material B comprises insoluble sulfur, tetramethylthiuram monosulfide and an accelerant; and the ratio of the A to the insoluble sulfur to the tetramethylthiuram monosulfide to the accelerant is 500 : 1.0-2.5 :1.0 : 0.7. The anti-crocking rubber sole is prepared by banburying, mill opening, sulfur treatment, measurement of a vulcanizing curve, oil pressure molding and a crocking test.

The invention discloses a carbon quantum dot/aurum cluster ratiometric fluorescent probe for detection of cadmium ion and ascorbic acid. A preparation method comprises the following steps: preparing CQDs (Carbon Quantum Dots) from alanine and histidine through a one-step hydrothermal method; performing amino-functionalization on the CQDs by using 3-aminopropyltriethoxysilane, wherein the CQDs which are subjected to the amino-functionalization serve as a reference chromophore; reducing chloroauric acid through sodium borohydride by taking 11-sulfydryl undecanoic acid as a surfactant to obtain MUA-modified AuNCs (Aurum Nano Clusters), wherein the MUA-modified AuNCs serve as a main fluorophore of the ratiometric fluorescent probe; finally, coupling the CQDs and the AuNCs through an amidation reaction to obtain the CQDs/AuNCs ratiometric fluorescent probe. On the basis of static quenching and inter-filtering effects, the fluorescence of the CQDs/AuNCs can be quenched by Cd<2+>; the invention discloses the application of the CQDs/AuNCs ratiometric fluorescent probe in Cd<2+> detection. The fluorescence of the CQDs/AuNCs which is quenched by the Cd<2+> can be recovered by the ascorbic acid, so that the ratiometric fluorescent probe can also be used for the detection of AA (Ascorbic Acid). The ratiometric fluorescent probe disclosed by the invention has the lower detection limit of 32.5 nM to the Cd<2+>, has the lower detection limit of 0.105 muM to the AA, and has an application value in the detection of the cadmium ion and the ascorbic acid.

The invention discloses a magnetic PAFs solid-phase extracting agent. A preparation method of the magnetic PAFs solid-phase extracting agent includes allowing 3-aminopropyl triethoxy silylation ferroferric oxide to have a temperature-programmed reaction with piperazine and cyanuric chloride in the presence of N, N-diisopropylethylamine to obtain the magnetic PAFs solid-phase extracting agent. The magnetic PAFs solid-phase extracting agent and the preparation method thereof have the advantages that the prepared magnetic PAFs solid-phase extracting agent is good in dispersity and stable in core-shell structure; the preparation method is simple, low in cost, widely applicable, capable of achieving repeated material recycling, and the like; a covalent organic framework bonded to the ferroferric oxide can provide various action sites such as an inclusion interaction site, a hydrogen-bond interaction site, a pi-pi interaction site and an anion exchange site, so that the covalent organic framework has specific recognition and retention acting force on polar substances such as phenols and carboxylic acids.

The invention discloses a cement-based capillary crystalline waterproof coating. A preparation method of the cement-based capillary crystalline waterproof coating comprises the steps of taking 630.8-748 parts of cement, 234.4-351.6 parts of quartz powder, 9.6-14.4 parts of methyl triethoxysilane, 8-12 parts of dehydrated ammonium aluminum sulfate, 240-350 parts of an emulsion binder, 192.7-289.5 parts of water, 96-144 parts of polyvinyl alcohol, 1.9-2.9 parts of an assistant and 2.4-3.6 parts of sodium methyl silicate; mixing the cement, the quartz powder, methyl triethoxysilane and dehydrated ammonium aluminum sulfate and stirring to obtain a powder material; mixing the emulsion binder, water, polyvinyl alcohol, the assistant and sodium methyl silicate and stirring to obtain a slurry; and mixing the powder material, the slurry and water according to a mass ratio of 6-6.5:4-4.5:4-4.5, and thus a cement-based capillary crystalline waterproof coating capable of being used instantly is obtained. The cement-based capillary crystalline waterproof coating can form a cement crystalline layer on building cement, so that self-waterproof cement concrete can be obtained.

The invention discloses a modified epoxy emulsion and a preparation method thereof. The emulsion comprises the following components in percentage by weight: 10-15 percent of epoxy resin E-06, 8-10 percent of ethylene glycol monobutyl ether, 7-8 percent of n-butyl alcohol, 4-4.5 percent of alpha-methacrylic acid, 1-1.5 percent of styrene, 1-1.5 percent of butyl acrylate, 0.4-0.8 percent of benzoyl peroxide, 1-1.5 percent of gamma-aminopropyl triethoxy silane, 3.2-4 percent of gamma-trimethoxypropylsilane, 3.2-4.2 percent of N,N-dimethylethanolamine and 50-60 percent of water. The preparation method comprises the following steps of: preparing for graft copolymerization; then, introducing hydrophilic monomers by utilizing the graft copolymerization method; and adding a mixture for further modification to obtain the modified epoxy emulsion. The modified epoxy emulsion has the characteristics of strong adhesion, good flexibility, hardness, corrosion resistance, water resistance, alkali resistance, scrub resistance and simple preparation process.

The invention discloses a preparation method of fluorescent complex microgel which is sensitive to temperature and pH. The method comprises the technical steps of preparing a mixed surface active agent, preparing the oil phase of a template, preparing an emulsive liquid, preparing a water phase, preparing N-isopropyl acryl amide copolymerized methacrylic acid microgel, preparing turgid N-isopropyl acryl amide copolymerized methacrylic acid microgel, preparing a mixed liquid of Gamma-aminopropyl triethoxy silane and normal heptane, preparing a silicon dioxide polymer complex microballoon decorated by a surface deposited amino group, preparing a mixed liquid of fluorescein isothiocyanate and absolute ethyl alcohol as well as preparing the fluorescent complex microgel. In the invention, the fluorescein isothiocyanate with high quantum yield and good optical stability is adopted as fluorescent matter; the prepared fluorescent complex microgel is sensitive to temperature and pH; and the size of the prepared fluorescent complex microgel is in a micron range and is hard to be aggregated. The method has the advantages of reasonable design, practical technique and easy operation; moreover, reactions are carried out under normal temperature and the like; the method can be applied to the fields of controlled release of medicament, biological probe, chemical separation, and the like.

The invention provides low-viscosity high-heat-conductivity organic silicon electronic pouring sealant and a preparation method thereof. The method comprises the following steps of: mixing high viscosity and low viscosity of vinyl polydimethylsiloxane; adding aluminum oxide with particle size of 1-5 microns as heat conduction filler; further adding a compound coupling agent formed by combining aluminic acid ester, KH570 (gamma-methylacryloyloxypropyl trimethoxysilane) and KH550 (gamma-aminopropyl triethoxysilane) and a compound flame retardant formed by combining melamine cyanurate and aluminum hydroxide into a base material system; and preparing the electronic pouring sealant according to a proper proportion. The prepared pouring sealant has high heat conductivity up to 2.5-3.0W.m<-1>.K<-1>, low viscosity of 2000-3000mPa.s, perfect fluidity and good flame retardance effect; and the production cost is low.

The invention discloses a preparation method of a porous biological carbon heavy metal adsorbing material based on cotton straw. The preparation method comprises the following steps: (1) adding the cotton straw into a ZnCl2 solution, carrying out stirring and impregnation for a certain time, and drying; (2) placing the dried cotton straw into an electric tube furnace for high-temperature calcination, grinding the calcined product into powder, adding the powder and ultrapure water into a hydrothermal reaction kettle, stirring till swelling is sufficient, heating for a reaction, and conducting centrifugal drying on the reaction product, so as to obtain a biological carbon material; (3) adjusting the pH of an ethanol aqueous solution with an acetic acid solution, adding 3-mercaptopropyl triethoxy silane into the ethanol aqueous solution, and carrying out oscillation to obtain a modified liquid; adding the biological carbon material into the modified liquid, carrying out oscillation and filtration, drying the obtained solid, washing the dried solid with an ethanol aqueous solution, and drying to obtain the biological carbon heavy metal adsorbing material. The preparation method is simple, and easy to operate; the biological carbon heavy metal adsorbing material prepared according to the method adopts a porous honeycomb-shaped structure, is large in specific surface area, high in heavy metal adsorbing property, and high in economic value and environment-friendly meaning.

The invention discloses organosilicon type marine antifouling paint binder. The structure of the paint binder is shown in the formula (1), wherein the paint binder is an organosilicon-polyurethane compound with bactericide side chain and R represents CH2CH3. The preparation method comprises the following preparation steps: 1) using chloropropylmethyldimethoxysilane and dimethyldimethoxysilicane to react and obtain chloropropyl-containing polysiloxane; 2) using chloropropyl-containing polysiloxane, tertiary amine and hydroxyl-containing tertiary amine to perform reflux reaction and generate polysiloxane with quaternary ammonium salt and hydroxyl; and 3) mixing isocyanate, butyltin dilaurate and polysiloxane with quaternary ammonium salt and hydroxyl with solvent, adding gamma-aminopropyltriethoxysilane to extend the chain and obtain prepolymer with the crosslinked group -Si(OCH2CH3), and using the prepolymer to perform crosslinking and condensation in the air and obtain the finished product. The organosilicon type binder has low surface energy performance and very good hydrophobicity; and the molecular chain has environmentally-friendly bactericide, thus the binder has very good bactericidal effect and marine antifouling effect.