正十四醇相变微胶囊的储能调温性及其在棉织物上的应用

Thermoregulating Performance of N-tetradecanol Phase Change Microcapsule and Its Applications on Cotton Fabrics

以相变材料正十四醇为芯材,苯乙烯和丙烯酸丁酯的共聚物为壁材,采用细乳液聚合法制备相变微胶囊。应用马尔文激光粒度仪、扫描电子显微镜、差示扫描量热仪和热重分析仪表征微胶囊的粒径、表面形貌、相变潜热和热稳定性。以正十四醇相变微胶囊乳液对棉织物进行浸渍整理,应用热红外成像仪、织物风格仪和透气量仪表征棉织物的调温性能、手感度和透气性。研究结果表明:当芯壳比为1∶1时,可得到平均粒径为463nm且球形度良好的正十四醇相变微胶囊,其峰值相变温度为40.95℃,相变潜热为77.8J/g;整理后棉织物的相变潜热可达2580J/(g·m2),表现出了明显的调温性能,且整理后棉织物的手感度下降幅度较小,但透气性明显降低。

Phase change microcapsules were prepared by means of miniemulsion polymerization with phase change material n-tetradecanol as core material and styrene and butyl acrylate as wall materials.The size,surface morphology,latent heat performance and thermal stability of the microcapsules were characterized with Malvin laser granulometer,scanning electron microscope,differential scanning calorimetry and thermogravimetric analyzer.Cotton fabrics were soaked and finished with n-tetradecanol phase change microcapsule emulsion,and the thermal control performance,hand feeling and breathability of the cotton fabrics were characterized with thermal infrared imager,fabric style tester and gas permeability meter.The research results show that n-tetradecanol phase change microcapsules with an average particle size of 463 nm and of good spherical shape can be obtained under the condition of ratio of core material to shell material of 1∶1,of which the peak phase-transition temperature is 40.95℃and the phase-transition enthalpy is 77.8J/g;the phase-transition enthalpy of the finished cotton fabrics can reach up to 2580J/（g·m2）,which indicates obvious thermal control performance;after finishing,the hand feeling of cotton fabrics is slightly reduced,but the breathability obviously decreases.