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耐高温高焓值相变微胶囊的制备及其凉感应用

Preparation and Cool-feeling Application of High-Temperature-Resistant and High-Entropy Phase Change Microcapsules

  • 摘要: 为解决凉感织物在经过印花涂层后凉感属性下降的问题,本文制备了一种耐高温高焓值的相变微胶囊,并用于凉感织物涂层,在赋予凉感织物印花图案的同时,不降低其凉感属性。本文利用沉积聚合方法合成密胺树脂包覆正十八烷相变微胶囊,并与粘合剂和交联剂混合配制成印花涂层浆料,用于3种凉感织物的涂层印花。本文测试了相变微胶囊及其涂层织物的热焓值、热稳定性和瞬间接触凉感值。实验结果表明,相变微胶囊表面光滑,热焓值为197 J/g,热分解温度为288 ℃。按相变微胶囊、粘合剂、交联剂的质量比为70∶25∶5配制相变微胶囊浆料,并将其应用于织物涂层,织物表面的相变微胶囊清晰可见,3种凉感涂层复合织物的热焓值分别为26.0 J/g、24.6 J/g、21.5 J/g,相变微胶囊涂层复合织物的瞬间接触凉感值Qmax≥0.24 W/cm2,得到进一步提升。经过皂洗后,相变微胶囊涂层复合织物的热焓值保持率>90%,具有良好的凉感效果。

     

    Abstract: In order to address the issue of the cool-feeling property of cool-feeling fabrics deteriorating after printing and coating, the phase change microcapsules (PCMs) with high phase-transition enthalpy and high thermal stability was fabricated for the coating of cool-feeling fabrics, conferring printed patterns to the cool-feeling fabrics without compromising their cool-feeling attributes. The melamine resin-coated n-octadecane PCMs were synthesized via deposition polymerization and blended with binders and crosslinking agents to formulate the printing coating slurry, which was utilized for the coating and printing of 3 cool-feeling fabrics. The phase-transition enthalpy, thermal stability, and contact transient cool-feeling of the PCMs and their coated cool-feeling fabrics were examined. The experimental outcomes indicated that the surface of the PCMs was smooth, with an phase-transition enthalpy of 197 J/g and a thermal decomposition temperature of 288 ℃. When the PCMs slurry was prepared at a mass ratio of PCMs: binder: crosslinking agent of 70:25:5 and applied to the fabric coating, the PCMs on the fabric surface were clearly discernible. The phase-transition enthalpy of the 3 cool-feeling fabrics were 26.0 J/g, 24.6 J/g, and 21.5 J/g respectively, and the cool-feeling coefficient of the PCMs cool-feeling fabrics was further enhanced and Qmax≥0.24 W/cm2. After soaping, the phase-transition enthalpy retention rate of the PCMs coated composite fabrics exceeded 90%, still maintaining excellent cool-feeling effects.

     

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