Aerogel and preparation method thereof
An aerogel, cetyl trimethyl ammonium chloride technology, applied in chemical instruments and methods, colloidal chemistry, colloidal chemistry and other directions, can solve the problems of complex process, unfavorable industrial production, long preparation period, etc. The effect of low density, shortened preparation cycle, and reduced production cost
Active Publication Date: 2014-05-28
靖影贵 +1
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Problems solved by technology
[0003] In recent years, in order to avoid the high temperature and high pressure conditions of supercritical preparation of aerogels, people have used methods such as surface modification and reducing the surface tension of solvents to try to realize the preparation of aerogels under non-supercritical conditions, but the process is more complicated. The preparation cycle is longer, which is not conducive to the realization of industrial production
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[0023] Such as figure 1 As shown, an airgel described in Example 1 of the present invention is made of the following raw materials in parts by weight: pure water 40, acetic acid 2, cetyltrimethylammonium chloride 10, methyltrimethoxysilane 33 and urea 15, wherein cetyltrimethylammonium chloride is nonionic cetyltrimethylammonium chloride, cationic cetyltrimethylammonium chloride, anionic cetyltrimethylammonium chloride One or more of trimethylammonium chloride and diionic cetyltrimethylammonium chloride.
[0024] Such as figure 1 Shown, the preparation method of above-mentioned airgel comprises the following steps:
[0025] Step 1: Blending liquid A, further comprising the following steps:
[0026] Step 1.1: Mix 12g of pure water and 2g of acetic acid evenly;
[0027] Step 1.2: Take 10g of cetyltrimethylammonium chloride and add it into the stirred pure water and acetic acid mixed solution, the stirring temperature is 20 degrees Celsius, and stir for 15 minutes until the m...
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The invention relates to an aerogel and a preparation method thereof. The aerogel is prepared from the following raw materials in parts by weight: 40 parts of pure water, 2 parts of acetic acid, 10 parts of cetyl trimethyl ammonium chloride, 33 parts of methyl trimethoxysilane and 15 parts of urea, wherein the cetyl trimethyl ammonium chloride is one or more of nonionic cetyl trimethyl ammonium chloride, cationic cetyl trimethyl ammonium chloride, anionic cetyl trimethyl ammonium chloride and bi-ionic cetyl trimethyl ammonium chloride. The preparation method comprises the following steps of: blending a solution A, blending a solution B, mixing the solution A and the solution B, gelating, washing, re-washing and drying. The aerogel disclosed by the invention has the beneficial effects of shortening the preparation period, reducing the production cost, being suitable for industrial production and having no toxicity or harm; and a heat preservation material prepared by using the aerogel disclosed by the invention has the advantages of hydrophobic property, effect of being very suitable for construction, low density, strong durability and no production of bubbling, cracking, improvement in heat preservation performance and other phenomena due to temperature changes.
Description
technical field [0001] The present invention relates to airgel and its preparation method. Background technique [0002] Airgel is a porous amorphous solid material composed of nano-scale particles or polymer molecules. It is the lightest condensed material in synthetic materials. The classic size of its pores is 20-80nm, and the porosity is as high as 80-98%, the density range is 50-180kg / m 3 , is a new type of material with many special properties and broad application prospects. Especially before entering the 1980s, the research on airgel was extremely active, and was listed as one of the top ten popular science and technologies in the 1990s by the American "Science" impurity. [0003] In recent years, in order to avoid the high temperature and high pressure conditions of supercritical preparation of aerogels, people have used methods such as surface modification and reducing the surface tension of solvents to try to realize the preparation of aerogels under non-supercr...
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IPC IPC(8): B01J13/00
Inventor 靖影贵横岡秀春
Owner 靖影贵