Templated cross-linking reactions for designing nanoporous materials
Templated cross-linking reactions for designing nanoporous materials
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DOI：
10.1016/j.msec.2006.06.028
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发表时间：
2007-09
期刊：
影响因子：
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通讯作者：
D. Schmidt;V. Raman;Chrystelle Egger;C. du Fresne;V. Schädler
中科院分区：
文献类型：
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作者：
D. Schmidt;V. Raman;Chrystelle Egger;C. du Fresne;V. Schädler
纳米多孔材料的渗透性、介电性、热学和光学性能具有潜在的用途。这些材料可能是目前在不同行业使用的绝缘泡沫的未来替代品。为了实现这种性能，需要利用克努森效应和低固体对热传导的贡献的高纳米多孔材料（孔径约100-150 nm，孔隙率≥85%）。通过使用微乳液和胶体分散体进行模板化交联反应来设计这种材料的潜力进行了研究。研究发现，这些模板有助于形成其细小孔隙结构（< 200nm）的特征，但无法避免交联时由于相分离和聚集效应而形成的较大孔隙（>.1 μm）。因此，这些材料的热性能介于传统的大孔泡沫（dpore ~ 40-100 μm）和溶胶-凝胶基纳米孔材料（dpore ~ 150 nm）之间。
Nanoporous materials are potentially useful for their permeation, dielectric, thermal and optical properties. These materials could be a future alternative for the insulating foams currently used in different industries. In order to realize such performance, highly nanoporous materials (pore size∼100–150 nm and porosity≥85%) that take advantage of the Knudsen effect and low solids contribution to heat conduction are required. The potential for designing such materials by carrying out templated cross-linking reactions using microemulsions and colloidal dispersions was investigated. It was found that these templates helped in imposing some fine pore structures (<200 nm) characteristic of them but the coarser pores (>1 μm) that are formed due to phase separation and aggregation effects upon cross-linking could not be avoided. As a result the thermal performance of these materials was in between the conventional macroporous foam (dpore∼40–100 μm) and sol-gel based nanoporous materials (dpore∼150 nm).