基于微界面重构的纤维素膜相变储能特性调控机制

以制备界面可控的纤维素微骨架相变储能膜方法优化和性能构建为切入点，以生物质（木材、竹材）为原料，利用基体中原纤维素三维多孔网状微骨架结构，结合分子间相互作用、毛细管效应渗流、化学改性等方法实现微界面重构，制备液体渗漏低、复配物封装容量高、导热率高、储放热焓值精确调控的微界面结构可控和性能可调的纤维素相变储能膜材料。探讨不同参数条件对膜的微界面重构的影响，微界面结构与膜性能的相关性，解析出“参数条件-微界面重构-性能匹配”的三维关联机制。研究膜材料中各组分的相容性、分子结构特性与微界面重构之间的关联机制、以及微界面重构与性能之间的匹配效应，构建“分子结构-微界面重构-性能匹配”三维关联机制。通过本项目的研究，为开发新型高效纤维素相变储能膜材料提供新的研究思路与技术储备。

In order to explore the optimizing method of preparing the controllable and high performance cellulosic micro-framework membrane, in this study, the biomass (wood and bamboo) is used as raw material, and the three-dimensional porous network micro-skeleton structure of the original cellulose is used as the matrix, combined with interfacial interaction, capillary effect percolation, chemical modification and other methods to achieve micro-interface reconstruction to prepare cellulose membrane material with low liquid leakage, high compound encapsulation capacity, high thermal conductivity, precise regulation of storage and release enthalpy, and micro-interface structure controllable and adjustable performance. The effects of different parameters on membrane micro-interface reconfiguration, the relationship between microstructure and membrane performance were discussed, and the three-dimensional correlation mechanism of "Parameter conditions-Micro interface reconfiguration-Performance matching" was discussed. To study the compatibility of each component in the membrane material, the correlation mechanism between molecular structure properties and micro-interface reconstruction, and the matching effect between micro-interface reconstruction and performance, to construct the three-dimensional correlation mechanism of "Molecular structure-Micro interface reconstruction-Performance matching". Through the research of this project, it will provide new research ideas and technical reserves for the development of new high-efficiency cellulose phase change energy storage membrane materials.