生物大分子修饰的金属有机框架薄膜的构筑及可控离子传输

快速及可控离子传输对解决当前能源及环境领域问题非常重要。优异的多孔金属框架材料（MOFs）在离子传输方面具有极大的潜力。但MOFs本身离子传导率低，且目前多是粉体压制的厚膜，严重阻碍了其实际应用。为解决这些问题，类似于生物体内的离子通道，本项目将利用生物大分子修饰MOFs直接制备出快速及可控离子传输的MOFs薄膜。主要研究内容：1）基于生物大分子的官能团及构象，结合MOFs孔道结构，建立室温将生物大分子引入MOFs薄膜晶体孔道中的方法，构筑快速三维离子通道，获得连续交生、无大缺陷的、具有快速且可控离子传输的生物大分子修饰的MOFs薄膜；2）研究生物线性大分子与水及其构筑的离子通道在MOFs孔道中的热力学性质；3）结合理论计算探明离子传输机理和调控机制，并探索其在离子分离提纯、离子传输膜及电池隔膜中的应用，为理解相应生物大分子在体内的离子传输行为提供借鉴，推动MOFs在相关领域的应用。

Fast and controllable ionic transportation is very important to solve the energy and environment issues. Duo to their unique porous properties, metal organic frameworks (MOFs) materials have shown promising potential for ionic transportation. While, typically MOFs itself is poor ionic conductor. In addition, current pressured MOFs thick films from their functional powders seriously obstacle them for real applications. In order to solve these problems, similar to the ionic channels in bio-systems, in this project, we will directly prepare continuous and well-intergrown bio-macromolecules functionalized MOFs thin films for fast and controllable ionic transportation. The detail research contents are: 1) based on the specific functional groups and conformation of bio-macromolecules, the structure of MOFs channel, we will establish a room temperature process to introduce biomolecules into the channels of MOFs, form a three-dimensional ionic transportation networks, obtain continuous well-intergrown without big voids bio-macromolecules functionalized MOFs thin films with fast and controllable ionic transportation properties; 2) we will investigate the thermal dynamic properties/status of linear bio-macromolecules and water in the nanochannels of MOFs, and the corresponding effect on ionic transportation; 3) Combining the theoretical simulation, the ionic transportation mechanism and tunable rules will be revealed; we will investigate the potential application of the prepared bio-macromolecules functionalized MOFs membranes for ionic separation and purification, proton exchanged membranes for fuel cells and other batteries. These will provide some clues for understanding the ionic transportation through ionic channels in bio-systems and promote their corresponding applications.