优化制备棕榈醇-棕榈酸-月桂酸/SiO_2复合相变调湿材料

Optimization for Preparation of Phase Change and Humidity Control Composite Materials of Hexadecanol-Palmitic Acid-lauric Acid/SiO_2

以SiO2为载体材料、以棕榈醇-棕榈酸-月桂酸为相变材料制备棕榈醇-棕榈酸-月桂酸/SiO2复合相变调湿材料,基于均匀设计和多元非线性回归法研究了各因素对复合相变调湿材料调湿性能和控温性能的影响。结果表明,各因素对性能影响大小的排序为:无水乙醇与正硅酸乙酯的物质的量比、溶液pH值、棕榈醇-棕榈酸-月桂酸与正硅酸乙酯的物质的量比、超声波功率、去离子水与正硅酸乙酯的物质的量比;优化制备方案为:溶液的pH值为2.68、超声波功率为113W、去离子水与正硅酸乙酯的物质的量比为9.03、无水乙醇与正硅酸乙酯的物质的量比为5.22、棕榈醇-棕榈酸-月桂酸与正硅酸乙酯的物质的量比为0.51。

Phase change and humidity control composite materials of hexadecanol-palmitic acid-lauric acid/SiO2 were prepared with SiO2 as carrier material and hexadecanol-palmitic acid-lauric acid as phase change material. The effect of processing parameters on performance of humidity- and tempera- ture-control of the composite materials was investigated by uniform design and multivariate nonlinear regression. The results show that their effect may be ranked as a sequence as follows： mole ratio of absolute alcohol to tetraethyl orthosilicate 〉 solution pH value 〉 mole ratio of hexadecanol-palmitic acid-lauric acid to tetraethyl orthosilicate 〉 ultrasonic wave power 〉 mole ratio of deionized water to tetraethyl ortho- silicate. The optimal processing parameters are as follows： solution pH value 2.68, ultrasonic wave power 113 W, mole ratio of deionized water to tetraethyl orthosilicate 9.03, mole ratio of absolute alcohol to tetraethyl orthosilicate 5.22, mole ratio of decanoic-palmitic acid to tetraethyl orthosilicate 0.51.