9 results about "Dimethyldiethoxysilane" patented technology

This invention discloses a natural antibacterial polydopamine microcapsule and its preparation method. The shell material of the natural antibacterial polydopamine microcapsule is polydopamine, and the core material is Artemisia argyi oil. Using a soft template method with dimethyldiethoxysilane (DMDES) as the raw material, dopamine is in-situ self-polymerized on the surface of polydimethylsiloxane (PDMS) emulsion droplets solubilized with Artemisia argyi oil to prepare natural antibacterial polydopamine microcapsules encapsulating Artemisia argyi oil. The microcapsules prepared by this invention are micrometer-sized, monodisperse, and have high sphericity, with an average size of 1 μm. They exhibit high encapsulation efficiency for Artemisia argyi oil, with the highest encapsulation efficiency reaching 21.5% of the total mass of the microcapsules. This invention overcomes the disadvantages of high cost and environmental pollution caused by the large use of surfactants in classic emulsions. The preparation process is simple; it overcomes the defects of Artemisia argyi oil's volatility and instability; it has good monodispersity and certain antibacterial efficacy; and it can have a potential long-lasting antibacterial effect through the sustained release of Artemisia argyi oil. The preparation of monodisperse natural antibacterial polydopamine microcapsules has broad application potential in the industrial production of aromatic microcapsules.

The invention provides a preparation method of an amphiphilic hybrid silicon-based antifouling coating, which comprises the following steps: S1, co-hydrolyzing a mixed organic silicon monomer and nano silicon dioxide, and adding a catalyst to carry out condensation polymerization to obtain organic-inorganic hybrid silicon resin; s2, reacting polyethylene glycol with a silane coupling agent containing an isocyanate group to obtain a polyethylene glycol prepolymer; s3, mixing the organic-inorganic hybrid silicon resin obtained in the step S1 with the polyethylene glycol prepolymer obtained in the step S2, and adding an amino silane curing agent for cross-linking reaction to obtain the amphiphilic hybrid silicon-based antifouling coating; the preparation method comprises the following steps: copolymerizing nano silicon dioxide serving as an inorganic phase with methylphenyldimethoxysilane, dimethyldiethoxysilane, KH560 and tetraethoxysilane through a water-dropping fixed emulsion polymerization method to synthesize organic-inorganic hybrid silicon resin, and introducing a polyethylene glycol flexible chain segment, so that the coating is endowed with efficient antifouling capacity while the integrity of the coating is maintained.

The application relates to the field of binders, and discloses a silicon material binder and a preparation method thereof. The silicon material binder comprises: 100 parts by weight of silicon powder; 3-5 parts by weight of silica sol; 40-60 parts by weight of a solvent; 1-3 parts by weight of a silane coupling agent; 1-3 parts by weight of a thickening agent; 5-10 parts by weight of modified nano-alumina; and 2-5 parts by weight of an organic silicon prepolymer. The modified nano-alumina is nano-alumina treated by a silane coupling agent KH-550, and has a particle size of 10-30 nm. The organic silicon prepolymer is a prepolymer prepared from methyl triethoxysilane and dimethyl diethoxysilane at a molar ratio of 1:(0.8-1.1), and has a weight average molecular weight of 2000-5000. The silicon material binder has good high-temperature compactness and thermal stability, and the silicon material binder has good initial bonding strength.

The application relates to the technical field of silicone coating preparation, and discloses a preparation method and application of transparent silicone coating. The preparation method comprises the following steps: mixing tetraethyl orthosilicate, methyl triethoxysilane, phenyl trimethoxysilane, dimethyl diethoxysilane, chloropropyl triethoxysilane and KH560 according to a specific proportion to obtain a silicone solution; dropping mixed acid liquid into the silicone solution while stirring, hydrolyzing and polycondensing to obtain a silicone resin; mixing silicone modified hydroxyl acrylic resin, polyester resin, isocyanate curing agent, dispersant, specific transparent filler, light-resistant and oxidation-resistant auxiliary agent, defoaming agent and water-based solvent according to a specific proportion, grinding and filtering to obtain silicone modified hydroxyl acrylic resin coating; and mixing 100 parts of the silicone resin and 20-100 parts of the silicone modified hydroxyl acrylic resin coating to obtain transparent silicone coating. The coating has good adhesion and adhesion to photovoltaic substrates, high hardness and good wear resistance.

The application provides a silicone-based long-acting anti-caking agent for hymexazol soluble powder and a preparation method thereof, and belongs to the technical field of hymexazol soluble powder; the preparation method comprises an epoxy-modified organosiloxane mixing step; in the epoxy-modified organosiloxane step, phenyltriethoxysilane, dimethyldiethoxysilane and 3-glycidyl ether oxypropyl triethoxysilane are mixed, and then deionized water and a hydrochloric acid solution are added; after uniform stirring, hydrolysis polycondensation is carried out at 50-80 DEG C for 2-4 h; condensation is carried out at 120-140 DEG C and under reduced pressure of-0.08 to-0.09 MPa for 1-2 h; after cooling and sieving, the obtained white powder is the epoxy-modified organosiloxane; the anti-caking agent prepared by the application has good anti-caking performance, high suspensibility and excellent fluidity.

The application discloses a kind of water-based environmental protection inks and preparation method and application in printing, it is related to ink field.The application is when preparing water-based environmental protection ink, it is mixed and reacted to obtain modified nanometer titanium dioxide by grafting 3-butene-1-alcohol after nanometer titanium dioxide, methyl acrylate trifluoroethyl ester and maleic anhydride are mixed evenly;It is reacted after dimethyl diethoxysilane, 1,1,3,3-tetramethyl disiloxane and hydroxypropyl pentamethyl disiloxane, and grafting 2-(2'-hydroxy-3'-methyl allyl-5'-methyl phenyl) benzotriazole to obtain modified siloxane;It is reacted to obtain modified polyurethane emulsion by grafting 2,2-dimethylol propionic acid and 1,4-butanediol after isophorone diisocyanate, modified siloxane, polyhexanedioic acid neopentyl glycol ester diol;Then modified polyurethane emulsion, modified nanometer titanium dioxide and each component are mixed evenly to obtain water-based environmental protection ink.The water-based environmental protection ink prepared by the application has excellent adhesion, water resistance, anti-aging and antifouling property.

This invention discloses a room-temperature curing, adjustable-hardness nano-silica sol-reinforced organosilicon coating and its preparation method. The raw materials for this room-temperature curing, adjustable-hardness nano-silica sol-reinforced organosilicon coating include: nano-silica sol, methyltriethoxysilane, dimethyldiethoxysilane, acetic acid, and deionized water. The solid content of the nano-silica sol is 20wt%-40wt%, the pH of the nano-silica sol is 8-10, and the particle size of the nano-silica sol is 5nm-30nm. The mass ratio of nano-silica sol, methyltriethoxysilane, dimethyldiethoxysilane, acetic acid, and deionized water is 100:(66-112):(20-66):2.6:19. The room-temperature curing, adjustable-hardness nano-silica sol-reinforced organosilicon coating of this invention exhibits good storage stability, requires no heating during the curing process, and produces a clear and bright organosilicon coating with an adjustable pencil hardness within the range of 5H-8H.

The application relates to the field of high-molecular composite membrane materials, in particular to an interface joint reinforced composite membrane and a preparation method and application thereof. The preparation method comprises the following steps: S1, carrying out gas phase hydration treatment on Silicalite-1 particles which are surface modified by a silane coupling agent in a predetermined temperature and humidity environment, to obtain modified Silicalite-1 particles carrying a water molecule induced layer; S2, adding the modified Silicalite-1 particles carrying the water molecule induced layer into a polydimethyl diethoxysilane (PDMDES) prepolymer solution, and carrying out ultrasonic treatment in a 0-10 DEG C environment, to obtain a composite membrane solution; and S3, coating the composite membrane solution on the surface of a base film through a blade coating process, and carrying out step-by-step solidification in an oven, to obtain the interface joint reinforced composite membrane. The prepared interface joint reinforced composite membrane has excellent pervaporation separation performance on the basis of maintaining good thermal stability and reducing non-selective leakage channels.

The invention relates to thixotropic liquid silicone rubber base rubber and a preparation method thereof. Comprising the following raw materials: vinyl silicone oil, white carbon black, modified cellulose and a coupling agent. The coupling agent is prepared from hexamethyl disilazane, dimethyl diethoxy silane and hydroxyl silicone oil, and the weight ratio of the hexamethyl disilazane to the dimethyl diethoxy silane to the hydroxyl silicone oil is 1 to (1.5 to 0.5) to (0.05 to 0.1). The liquid silicone rubber further comprises hydroxyl vinyl silicone oil, the content of the hydroxyl vinyl silicone oil is 0.01%-1%, and the viscosity of the hydroxyl vinyl silicone oil is 10 mPa.s to 10000 mPa.s. Under the joint cooperation of hexamethyldisilazane, dimethyldiethoxysilane and hydroxyl silicone oil, the dispersion of white carbon black in vinyl silicone oil is further promoted, the viscosity of the liquid silicone rubber during low shear is increased, and the thixotropic liquid silicone rubber with excellent performance is obtained. Cellulose is introduced into a silicone rubber system, and during standing, a rigid cellulose network and a white carbon black network are mutually interspersed and have synergistic interaction, so that the structural strength of the system is greatly enhanced.