基于傅里叶红外光谱的癸酸-棕榈酸/SiO_2相变储湿复合材料制备机理研究  

Study on Preparation Mechanism of Decanoic Acid-Palmitic Acid/SiO_2 Phase Change and Humidity Storage Composite Materials by Fourier Transform Infrared Spectrum

作　　者：尚建丽[1] 张浩[1] 熊磊[1] 麻向龙 

机构地区：[1]西安建筑科技大学材料与矿资学院,陕西西安710055

出　　处：《光谱学与光谱分析》2016年第6期1690-1695,共6页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(51172176);陕西省科技统筹创新工程计划项目(2013KTCL03-17);陕西省重点科技创新团队项目(2012KTC-11)资助

摘　　要：根据前期在相变储湿复合材料制备方面取得的成果,以SiO_2为载体材料、癸酸-棕榈酸为相变材料,采用溶胶-凝胶法制备癸酸-棕榈酸/SiO_2相变储湿复合材料。采用傅里叶红外光谱仪对癸酸-棕榈酸/SiO_2相变储湿复合材料制备过程各阶段的合成物质进行测试,即相变材料制备阶段、SiO_2载体材料制备阶段和癸酸-棕榈酸/SiO_2相变储湿复合材料制备阶段。研究SiO_2基相变储湿复合材料制备过程中SiO_2网络结构形成机理、癸酸-棕榈酸嵌入方式、癸酸-棕榈酸与SiO_2嵌合机理,阐明溶胶-凝胶法制备癸酸-棕榈酸/SiO_2相变储湿复合材料的相关机理。同时采用X射线衍射仪和扫描电子显微镜对癸酸-棕榈酸/SiO_2相变储湿复合材料的物质组成和微观形貌进行测试,以佐证癸酸-棕榈酸/SiO_2相变储湿复合材料的制备机理。结果表明:通过Si—O—Si基团断裂与重组形成大量闭合孔或笼有效地将癸酸-棕榈酸包覆,从而制备形成癸酸-棕榈酸/SiO_2相变储湿复合材料;在癸酸-棕榈酸/SiO_2相变储湿复合材料制备过程中癸酸-棕榈酸与SiO_2仅仅为物理嵌合,未发生任何化学反应;癸酸-棕榈酸/SiO_2相变储湿复合材料中SiO_2形成大量闭合孔或笼,一部分用于包覆癸酸-棕榈酸,发挥相变调温性能,另一部分利用其网络空隙结构,发挥储湿调湿性能,从而达到同时调节室内温度和湿度的目的。According to the research achievements of phase change and humidity storage composite materials preparation in early stage, SiO2-based phase change and humidity storage composite materials were made by sol-gel method with SiO2 as the carrier and decanoic acid-palmitic acid as a phase change material in this paper. Synthetic materials in every stage of preparation process of decanoic acid-palmitic acid/SiO2 phase change and humidity storage composite materials were measured by Fourier transform infrared spectrum, such as phase change material preparation stage, SiO2 carrier material preparation stage and decanoic acid-palmitic acid/SiO2 phase change and humidity storage composite materials preparation stage. In the process of decanoic acid-palmitic acid/SiO2 phase change and humidity storage composite materials preparation, SiO2 network structure forming mechanism, decanoic acid-palmitic acid embed mode, chimeric mechanism of SiO2 and decanoic acid-palmitic acid were researched, respectively, in order to explain the mechanism of how to prepare decanoic acid-palmitic acid/SiO2 phase change and humidity storage composite materials by sol-gel method. Meanwhile, material composition and micro topography of decanoic acid-palmitic acid/SiO2 phase change and humidity storage composite materials were tested by X-ray diffracmeter and scanning electron microscope, so as to provide evidence about preparation mechanism of decanoic acid-palmitic acid/SiOz phase change and humidity storage composite materials. The results showed that decanoic acid-palmitic acid is packed in a large number of closed pores or cages which were formed through breaking and restructuring of Si-O-Si groups; then, decanoic acid-palmitic acid/SiO2 phase change and humidity storage composite materials can be prepared based on those mentioned above. Decanoic acid-palmitic acid and SiOz are only physical chimeric to each other, without any chemical reaction in the preparation process of decanoic acid-palmitic acid/Si02 phase change and humidity storage com

关 键 词：傅里叶红外光谱 相变储湿 SIO2 复合材料 制备机理 

分 类 号：TU522.1[建筑科学—建筑技术科学]