复合相变微胶囊制备及其在棉织物上的应用

为获得低成本、高相变焓且相变温度适宜的蓄热调温纺织品,优选不同比例共混的硬脂酸和月桂酸作为相变芯材,以有机单体苯乙烯(St)和丙烯酸丁酯(BA)作为壁材,采用乳液聚合法制备硬脂酸-月桂酸/聚(苯乙烯-丙烯酸丁酯)相变微胶囊,并将微胶囊浸轧整理到棉织物上。研究结果表明:以质量比1∶9复配的硬脂酸-月桂酸作为相变芯材,熔融峰值相变温度为42.12 ℃,相变潜热为187.80 J/g;按芯壁比1∶1制备的微胶囊球形度良好,包覆率高达82.29%,熔融峰值相变温度为37.45 ℃,相变潜热为77.27 J/g,初始分解温度(150 ℃)比纯硬脂酸-月桂酸相变芯材提高了50 ℃左右,具有良好的热稳定性;浸轧整理后棉织物峰值相变温度为39.47 ℃,相变潜热为25.41 J/g,具有良好的蓄热调温功能。

Preparation of composite phase change microcapsules and its application on cotton fabrics

In order to obtain a heat storage temperature-regulating textile with low cost, high phase transformation and suitable phase transition temperature, stearic acid and lauric acid blended in different proportions were preferred as the phase change core material, and poly(styrene-butyl acrylate) was used as the wall material to prepare stearic acid-lauric acid/poly(styrene-butyl acrylate) phase change microcapsule by emulsion polymerization, and the stearic acid-lauric acid phase change microcapsules were treated on the cotton fabrics by padding process. The results show that the stearic acid-lauric acid with the mass ratio of 1∶9 is used as the phase change core material. The melting peak phase transition temperature is 42.12 ℃ and the latent heat of phase change is 187.80 J/g. The stearic acid-lauric acid/poly(styrene-butyl acrylate) phase change microcapsules prepared with the core/wall ratio of 1∶1 have good sphericity and the coverage rate is as high as 82.29%. The related melting peak phase transition temperature is 37.45 ℃, the latent heat of phase change is 77.27 J/g, and the initial decomposition temperature (150 ℃) is about 50 ℃ higher than the pure stearic acid-lauric acid phase change core material, having good thermal stability. After padding finishing, the peak phase transition temperature and the latent heat of phase change of the cotton fabric are 39.47 ℃ and 25.41 J/g, which has good heat storage and temperature regulation function.