层状双氢氧化物的层离及形成聚合物纳米复合材料结构的机理研究

项目名称： 层状双氢氧化物的层离及形成聚合物纳米复合材料结构的机理研究

项目编号： No.51302243

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 一般工业技术

项目作者： 李宝光

作者单位： 云南大学

项目金额： 25万元

中文摘要： 层状双氢氧化物（LDH）的片层与其它层状无机物的片层对比，具有长径比高、带正电荷和生物相容性好等独特性质；LDH/聚合物纳米复合材料的研究和应用前景广阔。本项目针对LDH片层电荷密度高和层间引力大导致片层在溶剂中层离困难的问题，探讨LDH的层离方法，深入分析LDH层离的机理，以求突破LDH/聚合物纳米复合材料制备中使用强极性有毒溶剂、有机改性的LDH难以在聚合物中完全剥离等限制,在实现LDH在亲水性和疏水性溶剂中可层离的基础上，探索LDH层离液与聚合物溶液形成稳定胶态纳米复合物，和纳米片层在聚合乳液中保持稳定的机制，分别构筑有序结构的 LDH/水溶性聚合物和完全剥离型LDH/非极性聚合物的纳米复合材料，研究LDH纳米片层与聚合物形成纳米复合结构的特点和规律。本项目有望明确LDH的层离机理，获得在性能温和且环境友好的溶剂中层离LDH的新方法，为LDH/聚合物纳米复合材料的制备开拓新途径。

中文关键词： 层形材料；层状双氢氧化物；层离；纳米片层；纳米复合材料

英文摘要： There is an extensive prospect in research and applications of layered double hydroxide (LDH)/polymer nanocomposites, due to their unique properties of LDH including high aspect-ratio, positively charged layer and biocompatibility, etc. Exfoliation of LDH is a critical step in achieving remarkable improvements in properties of LDH/polymer nanocomposites. However, LDH delamination in a solvent remains very difficult owning to high layer charge density and strong electrostatic interaction. The object of this proposal is to address the challenging issue of using toxic and strong polar agent, and isolating dispersion of organo-modified LDH in polymer matrix when fabricating LDH/polymer nanocomposites. Efforts will be concentrated on investigating the mechanism and the method of LDH delamination in solvent. Basing on delaminating LDH in hydrophobic and hydrophilic solvent respectively, formation mechanism for stable colloidal nanocomposites through mixing the suspension of LDH nanolayers with monomer or polymer solution will be studied. With LDH nanolayers as building block, attempts will be made to create ordered LDH/water-soluble polymer nanocomposites and exfoliated LDH/non-polar polymer nanocomposites. The effect of unique LDH nanolayer on fabrication of LDH/polymer nanocomposites will be investigated. It is spe

英文关键词： layered materials；layered double hydroxides；delamination；nanosheets；nanocomposites