超声波辅助制备改性SiO2基DA-PA调温调湿复合材料学术资讯

《复合材料学报》优先在线发表论文。

摘要：以硅烷偶联剂改性SiO2为壁材，癸酸（DA）-棕榈酸（PA）为芯材，利用超声波辅助溶胶-凝胶法制备改性SiO2基DA-PA调温调湿复合材料，分析了硅烷偶联剂用量、超声波功率、超声波时间和超声波温度对改性SiO2基DA-PA调温调湿复合材料粒径的影响，以及相关性能。结果表明，利用超声波辅助溶胶-凝胶法制备改性SiO2基DA-PA调温调湿复合材料，可以显著降低粒径尺寸和减小粒径分布。当硅烷偶联剂用量4.0 g、超声波功率120 W、超声波时间100 min和超声波温度60 ℃时，改性SiO2基DA-PA调温调湿复合材料的粒径较小且粒径分布较窄，即d90=87.36 nm、d50=63.34 nm、d10=44.02 nm和d90-d10=43.34 nm，其在相对湿度40.0%~65.0%范围内的平衡含湿量为0.1864~0.2379 g/g，相变温度为20.23~23.59 ℃，相变潜热为40.91~46.72 J/g，稳定性能良好。

关键词：调温调湿复合材料；改性SiO2；癸酸-棕榈酸(DA-PA)；超声波；粒径

Abstract: With silane coupling agent modified SiO2 as wall material and decanoic acid (DA)-palmitic acid (PA) as call material，modified SiO2 based DA-PA temperature and humidity control composite materials were prepared by sol-gel method with ultrasonic wave-assisted. The effects of content of silane coupling agent, ultrasonic wave power, ultrasonic wave time and ultrasonic wave temperature on the particle size of modified SiO2 based DA-PA temperature and humidity control composite materials and related properties were investigated. The results show that the particle size and its distribution of modified SiO2 based DA-PA temperature and humidity control composite materials can be significantly reduced using sol-gel method with ultrasonic wave-assisted. When the content of silane coupling agent of 4.0 g, ultrasonic wave power of 120 W, ultrasonic wave time of 100 min and ultrasonic wave temperature of 60 ℃, modified SiO2 based DA-PA temperature and humidity control composite materials has small diameter and narrow particle size distribution, such as d90=87.36 nm,d50=63.34 nm,d10=44.02 nm and d90-d10=43.34 nm. Its equilibrium moisture content in the relative humidity of 40.0%~65.0% is 0.1864-0.2379 g/g, phase change temperature is 20.23-23.59 ℃, phase change latent heat is 40.91~46.72 J/g, and the stability performance is good.