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首页> 外文会议>AIChE Annual Meeting >Perforated Monolayers for Gas Separations
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Perforated Monolayers for Gas Separations

机译：用于气体分离的穿孔单层

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Calix[n]arene-based surfactants were used to fabricate LB monolayers on highly permeable poly(1-trimethylsilyl-1-propyne) polymer substrates (15 μm). The resulting composite membranes showed significantly improved gas separation properties, such as a selectivity of more than 70 towards He/N2 and 3.5 towards O2/N2 gas pairs for 2 bilayers of 5, 11, 17, 23, 29, 35-hexaamidoxime-37, 38, 39, 40, 41, 42-Hexakis-(1-n-ctyloxy)calix[6]arene (1), and more than 200 and 10 towards He/N2 and O2/N2 gas pairs for 1 bilayer of 5, 11, 17, 23, 29, 35-hexakis[(N,N,N-trimethylammonium)-N-methyl]-37, 38, 39, 40, 41, 42-hexakis-(1-n-hexamedecyloxy)-calix[6]arene (2) that has been complexed with polystyrene sulfonate. The strong dependence of gas permeation properties of the calix[6]arene amidoxime-based composite membranes on alkyl chain length and feed gas humidity strongly support the hypothesis of the existence of two distinct pathways inside the membrane: one that involves intramolecular pores, which are controlled by the size of the calix[6]arenes, the other involves intermolecular pores (defects) which are generated by the lateral thermal motion of the calix[n]arenes. The first one is highly sizeselective to different gases and the later is not. This leads to the conclusion that these monolayers separate gases by a molecular sieving mechanism. The formation of polymerized monolayers using ion exchangeable calix[6]arenes and polyelectrolytes was successful in increasing the gas separation selectivity of the perforated membranes, and also their stability.
机译：CALIX [n]基于芳烯基表面活性剂在高渗透的聚（1-三甲基甲硅烷基-1-丙基）聚合物基材（15μm）上制造LB单层。所得复合膜显示出显着改善的气体分离性能，例如朝向He / N 2和3.5的大于70的选择性，朝向O2 / N 2气体对为2双层，23,17,23,29,35-六己酰胺-37 ，38,39,40,41,42-六羟基 - （1-氮氧氧基）胶[6]芳烃（1），朝向He / N2和O 2 / N 2气体对的5个，5个，11,17,23,29,35-六烷基[（n，n，n-三甲基铵）-n-甲基] -37,38,39,40,41,42-α-（1-n-hexamamy亚氧基） - CALIX [6]芳烃（2），其已复合与聚苯乙烯磺酸盐。碱[6]烷基链长度和进料气体湿度对基于磷酸酰胺的复合膜的强大依赖性强烈支持膜内两种不同途径的假设：涉及分子内孔隙的假设，这些毛孔由CALIX [6]的尺寸控制，另一个涉及由CALIX的横向热运动产生的分子间孔（缺陷）。第一个对不同的气体具有高度方向性，并且后来不是。这导致了这些单层通过分子筛分机制分离气体的结论。使用离子可更换杯的聚合单层形成聚合的单层[6]，并且聚电解质在增加穿孔膜的气体分离选择性时，以及它们的稳定性。

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