汞是一种毒性极强的重金属物质，如何高效去除水环境中的汞是水污染控制领域面临的严峻挑战。本项目基于聚偏氟乙烯（PVDF）的成膜效应、胺基的配位效应及新疆特色矿物纳米蛭石（VT）的高比表面积效应，开展系列胺基功能化的PVDF/蛭石（Amine-PVDF/VT）本体改性复合膜材料的可控制备，构建出吸附能力强、稳定性好、易分离回收的新型汞离子吸附剂。通过强碱诱导PVDF脱HF生成具有活性的C=C键，并将活性官能团本体接枝到PVDF链上，同时利用纳米蛭石的交联作用调节复合膜的机械性能。在此基础上，研究材料的复合生长机理及材料与汞离子间的相互作用，揭示吸附机理；掌握材料微观结构的调控规律，理清其与吸附性能之间的关系；系统评价环境因素（pH、温度、共存离子等）对复合膜吸附稳定性及再生性能的影响。本项目的成功实施将为设计该类膜吸附剂应用于水体汞污染的治理提供理论依据和技术支持。

Mercury is one of the most toxic heavy metals, and highly effective decontamination of the mercury from aqueous media remains a great challenge for the field of water pollution control. Based on the membrane formation of polyvinylidene fluoride (PVDF), complexation of amine functional groups, and high specific surface area of vermiculite nanoparticles (VT, a featured resource in Xinjiang), the project would design and fabricate a series of amine-functionalized PVDF/VT (Amine-PVDF/VT) composite membrane materials by bulk modification, to develop a new type of mercury ion adsorbents with high adsorption capacity, good stability, and easy separation and recovery. Firstly, PVDF will be triggered to generate an active C=C bond by strong alkali. Further, the Amine-PVDF/VT composite membranes can be fabricated via a one-step bulk grafting reaction of the active functional group to the C=C bond of the PVDF chain, following by a non-solvent induced phase inversion method. Meanwhile, the mechanical properties of the composite membranes are improved by the vermiculite nanoparticles because of their cross-linking effect. The mechanisms for the growth of composite membranes and their efficient response to mercury ions will be unveiled, and thereby the correlation between the microstructure of the developed composite membranes and their adsorption properties will also be revealed. Furthermore, the influences of various environmental factors (pH, temperature, coexisting ions, etc.) on the adsorption performance of the composite membranes will be greatly concerned. Overall, the successful implementation of this project will provide the theoretical basis and technical support for the design of the novel mercury ions adsorption membrane, and also has theoretical significance in the area of vermiculite modified composite materials.