以SiO₂为载体、癸酸-棕榈酸为相变材料，采用溶胶-凝胶法制备纳米级癸酸-棕榈酸/SiO₂相变储湿复合材料，以复合材料粒度d₅₀, d₉₀, d₁₀和d₉₀-d₁₀为评价指标，用激光粒度分析仪研究了溶质浓度、超声波功率、超声波分散时间及分散剂浓度对复合材料粒度分布的影响. 结果表明，激光粒度分析仪(测试范围1~10000 nm)可用于检测纳米级癸酸-棕榈酸/SiO₂相变储湿复合材料的粒度分布，且具有高度重复性，最佳分散条件为溶质(复合材料)浓度4 g/L，超声波功率300 W，超声波分散时间30 min，分散剂六偏磷酸钠浓度3 g/L.

With SiO₂ as the carrier and decanoic acid-palmitic acid as a phase change material, nano decanoic acid-palmitic acid/SiO₂ phase change and humidity storage composite materials were prepared by the sol-gel process. The effects of solute concentration, ultrasonic dispersing power, ultrasonic dispersing time and dispersant concentration on the particle size distribution of composite materials were investigated using the particle size d₅₀, d₉₀, d₁₀ and d₉₀-d₁₀ as evaluation indicator. The results indicated that the laser particle size analyzer (test range 1~10000 nm) is applicable to the particle size measurement of nano decanoic acid-palmitic acid/SiO₂ phase change and humidity storage composite materials showing high reproducibility. Optimum dispersion conditions are solute (composite material) concentration 4 g/L, ultrasonic dispersing power 300 W, ultrasonic dispersing time 30 min, dispersant sodium hexametaphosphate concentration 3 g/L.