Microdomain Control by Means of Epitaxial Growth and Its Application for Functional Materials

本项目旨在研究嵌段和接枝共聚物或聚合物共混物的微畴控制，方法是在支撑膜表面外延生长微异相畴图案。将这些复合膜转化为电荷镶嵌膜或生物医学器件是可能的。得到的结果如下：1。采用功能偶氮引发剂，在降解链转移剂的作用下，通过端盖反应合成了聚苯乙烯(PS) /聚醋酸乙烯大单体。这种大单体是制备具有良好定义的接枝共聚物的最佳材料之一。我试图通过外延生长的方法来控制PS/聚（4-乙烯基吡啶）（P4VP）共混物的畴结构。TEM和SEM观察发现，支撑膜表面由定义明确的聚（S-b-4VP）组成的微异相结构被传递到上层的微畴。2 .使用聚（HEMA-g-S）、聚乙烯醇(PVA)/P4VP、PS/P4VP和聚（VA-g-4VP）的聚（丙烯酸）(PAA)/P4VP的PS/PHEMA共混复合膜体系也得到了类似的结果。将上层某一组分的微畴固定后，湿蚀刻这些具有垂直取向微畴的膜，在支撑膜上获得固定组分的垂直取向微畴图案。通过从作为支撑膜的交联PS表面外延生长的方法，使微畴结构（片层和圆柱体）的界面平行于支撑膜表面。通过在多孔PVA或聚氯乙烯膜过滤器上构建PAA/P4VP共混-聚（VA-g-4VP）体系，制备了电荷镶嵌复合膜。在对正负电荷区域进行固定和对P4VP结构域进行季铵化处理后，利用这些电荷镶嵌复合膜对蔗糖中的氯化钾进行了透析分离实验。少

The aim of this project is to study the microdomain control of block and graft copolymers or polymer blends by means of an epitaxial growth of the microheterophase domain pattern on the support membrane surface. It is possible to convert these composite membranes into charge mosaic membrane or biomedical devices. The obtained results are as follows:1. Polystyrene(PS) /or polyvinyl acetate macromonomers were synthesized by a functional azo-initiator in the presence of degradative chain transfer agent, followed by an end-capping reaction. This macromonomer is one of the best for the preparation of well-defined graft copolymers.2. I have attempted to control the domain structure of PS/poly(4-vinylpyridine)(P4VP) blend by means of epitaxial growth. It was found from TEM and SEM observations that the microheterophase structure of the support membrane surface composed of a well-defined poly(S-b-4VP) was transmittd to the microdomains of the upper layer. Similar results have been also obtaine … More d for the composite membrane systems of PS/PHEMA blend using poly(HEMA-g-S), poly(vinyl alcohol)(PVA)/P4VP, PS/P4VP, and poly(acrylic acid)(PAA)/P4VP using poly(VA-g-4VP).3. These membranes having vertically-oriented microdomains were being wet-etched after domain fixing of one component of the upper layer, the vertically-oriented microdomain patterns of the fixed component were obtained on the support membrane.4. The microdomain structures (lamellae and cylinders) were oriented their interfaces parallel to the support membrane surface by means of an epitaxial growth from the surface of crosslinked PS as a support membrane.5. The Charge mosaic composite membranes were prepared by constructing PAA/P4VP blend - poly(VA-g-4VP) systems on the porous PVA or poly(vinyl chloride) membrane filters. After the treatment of domain fixing of positive/negative charge regions and quaternization of P4VP domains, the dialytic separation of KCl from saccharose was tested with these charge mosaic composite membranes. Less