发明名称 |
Preparation of high porosity xerogels by chemical surface modification. |
摘要 |
This invention provides an extremely porous xerogel dried at vacuum-to-below supercritical pressures but having the properties of aerogels which are typically dried at supercritical pressures. This is done by reacting the internal pore surface of the wet gel with organic substances in order to change the contact angle of the fluid meniscus in the pores during drying. Shrinkage of the gel (which is normally prevented by use of high autoclave pressures, such that the pore fluid is at temperature and pressure above its critical values) is avoided even at vacuum or ambient pressures.
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申请公布号 |
US5565142(A) |
申请公布日期 |
1996.10.15 |
申请号 |
US19930055069 |
申请日期 |
1993.04.28 |
申请人 |
DESHPANDE, RAVINDRA;SMITH, DOUGLAS M.;BRINKER, C. JEFFREY |
发明人 |
DESHPANDE, RAVINDRA;SMITH, DOUGLAS M.;BRINKER, C. JEFFREY |
分类号 |
B01J13/00;C01B33/16;(IPC1-7):B01J13/00;B05D7/00;C03C17/30;E04B1/74 |
主分类号 |
B01J13/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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