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- 2018
基于FTIR和RBF网络的二元脂肪酸/SiO2相变储湿复合材料热湿性能优选预测
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Abstract:
采用溶胶-凝胶法制备二元脂肪酸（BFA）/SiO2相变储湿复合材料，既具有相变调温性能，又具有储湿调湿性能，还能满足无机材料的相容性。研究溶液pH值、超声波功率、去离子水用量、无水酒精用量及BFA用量对BFA/SiO2相变储湿复合材料结构的影响规律，通过FTIR分析BFA/SiO2相变储湿复合材料的嵌合机制。通过RBF网络，研究BFA/SiO2相变储湿复合材料的结构参数与热湿性能优选预测模型。结果表明：BFA/SiO2相变储湿复合材料中BFA与SiO2仅仅是物理嵌合。最优热湿性能的BFA/SiO2相变储湿复合材料制备工艺参数：pH值为3.64、超声波功率为120 W、去离子水用量为1.45 mol、无水乙醇用量为0.78 mol和BFA用量为0.079 mol。预测结果：30%相对湿度（RH）~90% RH湿容量为0.1676 g/g、相变焓为41.89 J/g。测试结果：30% RH~90% RH湿容量为0.1653 g/g、相变焓为41.22 J/g。 Binary fatty acid(BFA)/SiO2 phase change humidity storage composite materials were prepared by sol-gel method, which have phase change thermal control performance, humidity storage humidity control performance and can meet the compatibility with inorganic materials. The influence regulations of solution pH value, ultrasonic wave power, deionized water amount, absolute alcohol amount and BFA amount on structure of BFA/SiO2 phase change humidity storage composite materials were studied. The chimeric mechanism of BFA/SiO2 phase change humidity storage composite materials were analyzed by FTIR. The structure parameters and thermal-humidity performance in optimization performance forecast model of BFA/SiO2 phase change humidity storage composite materials were studied by RBF neural network. The results show that the interaction between BFA and SiO2 is only physical chimeric in BFA/SiO2 phase change humidity storage composite materials. The preparation process parameters of BFA/SiO2 phase change humidity storage composite materials with optimal thermal-humidity performance:solution pH value is 3.64, ultrasonic wave power is 120 W, deionized water amount is 1.45 mol, absolute alcohol amount is 0.78 mol and BFA amount is 0.079 mol. Predicted results:moisture capacity in 30% relative humidity(RH)~90%RH is 0.1676 g/g, phase change enthalpy is 41.89 J/g; Test results:moisture capacity in 30%RH~90%RH is 0.1653 g/g, phase change enthalpy is 41.22 J/g. 国家自然科学基金（51108002）；安徽高校自然科学研究重大项目（KJ2016SD08）
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