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Separation Properties and Evaluation of Smart Membrane

智能膜的分离性能及评价

基本信息

批准号：
13133202
负责人：
TSUJITA Yoshiharu
金额：
$ 48.7万
依托单位：
Nagoya Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research on Priority Areas
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13133202/
关键词：
Smart membrane Molecular cavity Syndiotatic polystyrene 8 form crystal complex Mesophase Molecular capillary micro-phase separation Calixarene メゾフェイズ含有sPS膜 α型結晶架橋PDMS膜揮発性有機化合物の除去 δ形コンプレックス結晶 α結晶選択収着能 PDMS PMMAブロック共重合体膜 /

项目摘要

The results obtained in this research project are summarized as below descriptions.1. Syndiotactic polystyrene (sPS) can take four different crystals under the various conditions of their preparations. The 8 form complex consists of the TTGG helical sPS chains and some organic molecules as a guest. By releasing the guest molecules in kept the steric structure and formation of sPS chains, the 8 form complex converts to the mesophase, Nagoya Institute of Technology, Graduate School of Engineering, Associate Professor which has "molecular cavity". A good method of preparation of the sPS-mesophase was established. The mesophase structure (size, shape in 0.01 nm order) can control by using guest molecules such as toluene, xyleneisomers, and chloroform. The sorption experiments showed preference sorption properties of the mesophase. On the other hand, a form of sPS is consisted by TT conformed chains and presents the intermolecular spaces connected along sPS TT chains, it can be said "molecu … More lar capillary". The preparation and orientation by magnetic field of the a form crystal of sPS were also established in this study. In a form crystal of sPS, it's firstly discovered that the gas permeation coefficients increased with crystallinity, and when the cross-section area of the gas molecule as a penetrant was bigger than that of "molecular capillary", permeation through there is impossible, indicating a form containing sPS membrane is a smart membrane.2. The graft and block copolymers made of PDMS and PMMA were synthesized in order to get the high-performance membrane having the selectively separation of VOCs from aqueous solution by pervaporation method. VOC's separation performance was strongly depend on the micro-phase separation structures of these copolymer membranes, further, the chemical modification of membrane surface and the introduction of calixarene as a molecular cavity were effective techniques for the high performance. Finally, the separation factor of benzene/water was reached over 5,000. Less

本研究所取得的成果概括如下：1.间同立构聚苯乙烯（sPS）在不同的制备条件下可以形成四种不同的结晶。8型复合物由TTGG螺旋sPS链和作为客体的有机分子组成。通过释放保持空间结构和形成sPS链的客体分子，8型复合物转化为中间相，名古屋工业大学工学研究生院副教授，具有“分子腔”。建立了一种制备sPS中间相的方法。中间相结构（尺寸、形状在0.01 nm量级）可以通过使用客体分子如甲苯、二甲苯异构体和氯仿来控制。吸附实验表明中间相具有较好的吸附性能。另一方面，sPS的一种形式是由TT型链组成，并呈现出沿着sPS TT链连接的分子间空间，可以说是“分子间空间”。 ...更多信息最大毛细管”。本研究还建立了α型sPS晶体的制备和磁场定向。在sPS的晶型中，首次发现气体渗透系数随结晶度的增大而增大，当作为渗透剂的气体分子的截面积大于“分子毛细管”截面积时，气体无法透过，表明含有sPS的膜是一种智能膜.为了制备具有选择性分离VOCs的渗透汽化膜，合成了聚二甲基硅氧烷（PDMS）和聚甲基丙烯酸甲酯（PMMA）的接枝共聚物和嵌段共聚物。共聚物膜的微相分离结构决定了其对VOC的分离性能，而对膜表面进行化学改性和引入杯芳烃作为分子空腔是提高其分离性能的有效手段。最终苯/水的分离因子达到5000以上。少