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采用溶胶-凝胶法制备棕榈醇-棕榈酸-月桂酸/SiO_2复合材料。利用响应面法研究了无水乙醇用量、去离子水用量以及棕榈醇-棕榈酸-月桂酸用量对棕榈醇-棕榈酸-月桂酸/SiO_2复合材料热湿综合性能的影响,并对棕榈醇-棕榈酸-月桂酸/SiO_2复合材料的制备工艺参数进行了优化。结果表明,各因素对性能影响的主次顺序为:无水乙醇用量>棕榈醇-棕榈酸-月桂酸用量>去离子水用量;在本研究的各参数范围内,优化方案是无水乙醇用量(与正硅酸乙酯的物质的量比)为9.11、去离子水用量为5.21、棕榈醇-棕榈酸-月桂酸用量为0.52。优化棕榈醇-棕榈酸-月桂酸/SiO_2复合材料具有良好的热湿综合性能,即相对湿度50%时,平均平衡含湿量为0.102 0g/g,相变温度为26.81~28.52℃,相变焓为95.69J/g,属于微米级有机相变芯材/无机基体复合材料。
Preparation of Palmitic-Palmitic Acid-Lauric Acid / SiO_2 Composites by Sol-Gel Method. The effects of amount of anhydrous ethanol, deionized water and amount of palmitol-palmitate-lauric acid on the thermal and moisture comprehensive properties of the palmithanol-palmitic acid-lauric acid / SiO_2 composites were studied by response surface methodology. The preparation parameters of palmitic acid-lauric acid / SiO 2 composites were optimized. The results showed that the main order of influence of each factor on performance was as follows: anhydrous ethanol> palmitol-palmitate-lauric acid> dosage of deionized water. In the range of parameters in this study, the optimized scheme was anhydrous ethanol (Amount of tetraethyl orthosilicate) was 9.11, the amount of deionized water was 5.21 and the amount of palmitol-palmitate-lauric acid was 0.52. The optimized palmitic-palmitic acid-lauric acid / SiO 2 composites had good heat and moisture comprehensive properties, that is, the average equilibrium moisture content was 0.102 0 g / g and the phase transition temperature was 26.81-28.52 ℃ when the relative humidity was 50% The enthalpy is 95.69J / g, belonging to micron-level organic phase change core / inorganic matrix composites.