具有自吸附功能的相变负载多孔材料的构筑及其蓄热性能研究

项目名称： 具有自吸附功能的相变负载多孔材料的构筑及其蓄热性能研究

项目编号： No.51503006

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 一般工业技术

项目作者： 万贤

作者单位： 北京工商大学

项目金额： 20万元

中文摘要： 本项目拟采用凝胶溶胶法和水热方法相结合，采用透射电镜、扫描电镜、红外以及核磁等分析手段，研究在无致孔剂条件下具有不同多孔尺寸及空心程度的有机硅微球的制备机理；构筑微球的孔道结构，使之对相变材料实现自吸附，采用DSC、DTG等测试手段研究复合多孔相变材料的相变热以及循环冻融的稳定性；并研究复合多孔相变材料的自吸附结构的形成及吸附机理。选用多种典型的带有官能团的硅烷偶联剂作为制备单体，通过制备条件的设计，进行水热条件下Ostwald ripening熟化程度的调控，结合动力学分析建立机理模型，并通过对有机硅微球形貌以及有机硅微球内部的多孔及空心度的调控，实现形貌可控、空心度可控的微球制备。通过载体结构的设计，系统研究多孔孔道结构与表面修饰等因素在复合相变材料的吸附量、吸附效率等方面的影响规律，建立微孔道吸附模型。为高效、宏量制备自吸附复合多孔相变材料进行理论探索和提供制备工艺。

中文关键词： 聚倍半硅氧烷负载材料；相变材料；自吸附；多孔；机理

英文摘要： The project intends to prepare polysilsesquioxane carrier with various degrees of porous and hollow structures by combining the sol-gel method with hydrothermal method in the absence of the porogen, and explore the formation mechanism in the process. Architecting the pore structure of the microsphere can make it more adsorbable to phase change materials ( PCM). The thermal performance and cyclic freezing and thawing stability of the composite porous PCM can be verified through analysis methods such as differential scanning analysis (DSC) and differential thermal gravity (DTG). The mechanism of porous composite PCM is researched from two aspects: the formation of adsorption stucture and the phenomenon of automatic adsorption. A variety of typical silane coupling agents with functional groups are chosen as monomers to prepare polysilsesquioxane carrier with controllable morphology and porous degree, and the formation model will be established using dynamic analysis. The expectant controllable parameters include the degree of Ostwald ripening, the morphology of porous polysilsesquioxane microspheres, and the degree of porous and hollow structure of microspheres. By designing the polysilsesquioxane carrier structure, the influence mechanism of porous pore structure and surface modified on the adsorption capacity, the adsorption efficiency and other factors is investigated systematically. The project will improve the preparation methods largely and bring theoretic exploration for efficient and large-scale preparation of the PCM composite with automatic adsorption performance.

英文关键词： Polysilsesquioxane Carrier;Phase Change Materials;Automatic Adsorption;Porous;Mechaism