高分子-配位多孔纳米笼复合材料合成及其性能研究

本项目拟通过配位化学法制备结构明确的高分子-配位多孔笼纳米复合材料，以小角X光和中子散射为主要表征手段，通过研究该复合材料的结构、自组装机理、溶液性质、气体吸附分离性能以及力学性能，建立该纳米复合材料结构-功能的相关性，指导优化和合成具有较强吸附和分离功能且具有较好力学性能的智能复合材料。主要展开研究：（1）使用活性阴离子聚合合成一系列间苯二甲酸端基修饰的大分子配体，通过配位自组装的方法，与醋酸铜自组装形成高分子-纳米笼复合材料；（2）使用小角散射的方法，原位检测大分子配体与铜离子在溶液中的反应过程，提出高分子-纳米笼的组装动力学和自组装机理；（3）分别合成分子量对等的含氢和含氘的高分子-金属笼材料，利用小角中子散射研究复合材料的高分子链臂在溶液中交换动力学；（4）结合笼状纳米颗粒的孔道效应与高分子的机械性能，设计并制备具有柔性的复合材料，开辟其在气体分离和选择性催化中到应用。

We propose to synthesize a group of well-defined nanocomposites of polymer-porous coordination nanocage (PPCN) through coordination chemistry protocols. Small angle X-ray and neutron scattering (SAXS and SANS) techniques will be the major characterization tools used to explore the structures, self-assembly mechanism, solution behavior, gas absorption/separation capability and mechanical properties. This study will help correlate the structures of the nanocomposites to their functionalities and guide the optimization of smart nanocomposites for better absorption/separation capacity and mechanical properties. The main studies will be: (1) preparing a series of polymers with isophthalic acid as ending group and assembling them with copper ion into PPCN, respectively; (2) in situ monitoring the self-assembly process of macromolecular ligands and copper ion and proposing the self-assembly mechanism of PPCN using SAXS and SANS; (3) synthesizing hydrogenated and deuterated PPCN with identical molecular weight, respectively and applying SANS to monitor the dynamic exchange process among macromolecular ligands of PPCN in solutions;(4) designing and preparing soft nanocomposite from the porosity of nanocages and mechanical properties of polymers, facilitating the applications for gas separation and selective catalysis.