Using gel morphology to control pore shape
Using gel morphology to control pore shape
复制标题
利用凝胶形态控制孔形状
DOI：
10.1039/c3nj01295f
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Foster J
中科院分区：
文献类型：
--
作者：
Foster J
采用不同纤维形态的超分子凝胶作为模板，制备了具有不同孔形的介孔共价聚合物。两种具有不同氨基酸基团功能化的双尿素衍生凝胶在1:1甲基丙烯酸甲酯：乙二醇二甲基丙烯酸酯（MMA: EGDMA）混合物中形成凝胶，具有带状或圆柱形纤维形态。单体的聚合产生含有凝胶的复合材料。凝胶模板可以很容易地通过用甲醇洗涤去除，以得到多孔材料，其中凝胶形态被印在共价聚合物基体上。扫描电子显微镜测量显示，所得聚合物表现出明显不同的孔隙形状，与不同形状的凝胶纤维的孔隙形状相对应。氮吸附测量证实了这些观察结果，显示介孔材料具有相当大的BET表面积、吸附-解吸等温线和孔径分布。凝胶浓度提供了一种控制孔隙率的现成手段，并对不同凝胶浓度制备的样品进行了比较。因此，凝胶分子结构的微小变化可以用来生产具有非常不同孔隙形状、大小和吸附特性的聚合物材料。
Supramolecular gelators with different fibre morphologies have been used as templates to form mesoporous covalent polymers with different pore shapes. Two bis-urea derived gelators functionalised with different amino-acid groups form gels in 1 : 1 methyl methacrylate : ethylene glycol dimethacrylate (MMA : EGDMA) mixtures with either ribbon-like or cylindrical fibre morphologies. Polymerisation of the monomer produces composite materials containing the gelators. The gel template can be readily removed by washing with methanol to give porous materials in which the gel morphology is imprinted on the covalent polymer matrix. Scanning electron microscopy measurements show the resulting polymers exhibit strikingly different pore shapes corresponding to those expected for the differently shaped gel fibres. Nitrogen adsorption measurements corroborate these observations showing mesoporous materials with considerable BET surface areas, adsorption–desorption isotherms, and pore size profiles. Gelator concentration provides a ready means of controlling porosity and samples prepared at different gelator concentrations are compared. Small changes in the molecular structure of the gelator can therefore be used to produce polymeric materials with very different pore shapes, sizes and adsorption characteristics.
影响因子：
4.9
作者：
M. Piepenbrock;N. Clarke;Jonathan A. Foster;J. Steed
通讯作者：
M. Piepenbrock;N. Clarke;Jonathan A. Foster;J. Steed
含有氢键纳米管组件的微孔聚丙烯酸酯基质
DOI：
--
发表时间：
2010
期刊：
影响因子：
--
作者：
F. Ouhib;E. Bugnet;A. Nossov;J. Bonardet;L. Bouteiller
通讯作者：
L. Bouteiller