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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。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进一步提升,瞬间接触凉感值Qmax≥0.24 W/cm2。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 three 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 three 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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