A kind of preparation method of gold nanoparticle composite silicone rubber
A gold nanoparticle and organosilicon rubber technology is applied in the field of nanocomposite material preparation to achieve the effects of long distance between particles, simple preparation process and broad application prospect.
Inactive Publication Date: 2016-06-15
QINGDAO UNIV OF SCI & TECH
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Problems solved by technology
[0004] The purpose of the present invention is to overcome the shortcomings of the prior art, aiming at the problem of agglomeration of gold nanoparticles in the preparation process of nanoparticle composite materials and the agglomeration of gold nanoparticles in the resulting composite material, seek to provide a gold nanoparticle composite organosilicon rubber Preparation method, technology and method for realizing uniform dispersion of gold nanoparticles and silicone rubber matrix material
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[0022] The schematic diagram of the preparation process of this embodiment is as follows figure 1 As shown, the specific steps are:
[0023] (1) Slowly add 300 mL (containing 15 mg of Au) of an aqueous dispersion of gold nanoparticles with an average diameter of 15 nm prepared by citric acid reduction into 300 mL of tetrahydrofuran solution containing 100 mg of 10-alkenyl undecanethiol and stir for 10-20 h , remove the solvent by centrifugation, and obtain gold nanoparticles protected by 10-alkenyl undecanethiol;
[0024](2) The gold nanoparticles protected by 10-alkenyl undecanethiol obtained in step (1) are dispersed in 10mL tetrahydrofuran solution, and 3-6g of polydimethylsiloxane ( Mn, 17500), add Pt catalyst, heat reaction at 65-70°C for 24 hours, centrifuge to remove unreacted polydimethylsiloxane and tetrahydrofuran solvent, and obtain polydimethylsiloxane-wrapped gold nanoparticles ;
[0025] (3) Add 2 mL of polydimethylsiloxane prepolymer for preparing silicone ru...
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Abstract
The invention belongs to the technical field of preparation of nanocomposite materials, and relates to a method for preparing gold nanoparticles composited with silicone rubber. Firstly, gold nanoparticles coated with C=C double bonds are prepared; and then coated with C=C double bonds. The gold nanoparticles dispersed in tetrahydrofuran, toluene or N,N'-dimethylformamide solvent, then add polydimethylsiloxane and platinum catalyst to react, and obtain gold nanoparticles wrapped in polydimethylsiloxane ; Then the polydimethylsiloxane-wrapped gold nanoparticles are mixed with the polydimethylsiloxane prepolymer to form a uniform dispersion system of gold nanoparticles in the polydimethylsiloxane prepolymer; Finally, add hydrogen-containing silicone oil crosslinking agent to the dispersion system, stir and mix evenly, and pour it into a rubber mold to obtain gold nanoparticle composite silicone rubber; the preparation process is simple, and the prepared gold nanoparticle composite silicone rubber has high weather resistance and High temperature resistance, antistatic ability and nonlinear optical properties, broad application prospects.
Description
Technical field: [0001] The invention belongs to the technical field of nanocomposite material preparation, and relates to a method for preparing a gold nanoparticle composite organosilicon rubber, and prepares a uniformly dispersed and stable gold nanoparticle composite organosilicon rubber elastomer material. Background technique: [0002] Gold nanoparticles belong to metal nanomaterials, which are nanometer-sized crystal particles composed of gold atoms. Nanoparticles do not decompose under sunlight like organic dye molecules, so the color of gold nanoparticles is almost "eternal". Europe has used gold nanoparticles to dye church glass since the Middle Ages, and it is still used for dyeing glass crafts; on the other hand, silicone rubber mainly refers to elastomers prepared from polydimethylsiloxane-based polymers , is an inert, non-toxic, non-flammable material, and has the characteristics of high transparency, high temperature resistance, and high weather resistance, a...
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IPC IPC(8): C08L83/04C08K9/10C08K3/08
Inventor 李东祥郝雄文张耀军李春芳
Owner QINGDAO UNIV OF SCI & TECH