- 目录
- 保温材料与建筑节能
- 首页
石蜡/改性粉煤灰定形相变材料的制备及热性能研究
作者：高慧，孟多
（辽宁工业大学 土木建筑工程学院，辽宁 锦州 121001）
摘要：以石蜡（PA）为相变芯材，以经酸浸法处理的改性粉煤灰（mFA）为封装基体，采用真空浸渍工艺制备PA/mFA定形相变材料。通过熔融泄漏测试、FT-IR、DSC、蓄放热性能试验研究了PA/mFA定形相变材料的化学相容性、相变热物性等。结果表明，m（PA）：m（mFA）=1∶4时，PA/mFA定形相变材料基本无泄漏，PA与mFA为物理掺混；PA/mFA定形相变材料的相变温度为22.6 ℃，符合人体舒适温度，相变潜热较高，为41.3 J/g；PA/mFA定形相变材料熔化和凝固过程中温度变化均滞后于环境温度变化。
关键词：定形相变材料；改性粉煤灰；真空浸渍；固废利用；相变储能
中图分类号：TU55 文献标识码：Ａ 文章编号：1001-702X（2023）04-0001-06
Preparation and thermal properties of paraffin/modified fly ash form-stable phase change material
GAO Hui，MENG Duo
（School of Civil and Architectural Engineering，Liaoning University of Technology，Jinzhou 121001，China）
Abstract：Paraffin（PA） was used as the phase change material and modified fly ash（mFA）treated by acid leaching method as the encapsulation matrix， and PA/mFA form-stable phase change material was prepared by vacuum impregnation process. The chemical compatibility and phase change thermal properties of PA/mFA form-stable phase change material were studied by melt leakage test，FT-IR，DSC，and heat storage and release performance test. The results show that when the mass ratio of paraffin to fly ash is m（PA）∶m（mFA）=1∶4，PA/mFA form-stable phase change material has no leakage of melt PA，and PA and mFA are physically blended. The phase transition temperature of PA/mFA form-stable phase change material is 22.6 ℃，conforming to the comfortable temperature of the human body，the phase change latent heat is 41.3 J/g. The temperature change during melting and solidification of PA/mFA form-stable phase change material lag significantly behind the change of ambient temperature.
Key words：form-stable phase change material，modified fly ash，vacuum impregnation process，solid waste utilization，phase change energy storage