材料期刊网

以抹灰石膏作为基体材料,将癸酸-棕榈酸-SiO2相变储湿材料掺入抹灰石膏中,制备癸酸-棕榈酸-SiO2/石膏相变储湿复合材料,对其基本性能、储湿调湿性能、相变调温性能和耐久性能进行测试与分析。利用FTIR和 SEM研究癸酸-棕榈酸-SiO2/石膏相变储湿复合材料的结构组成和微观形貌。结果表明：当癸酸-棕榈酸-SiO2相变储湿复合材料掺量为40wt%的癸酸-棕榈酸-SiO2/石膏相变储湿复合材料具有最佳性能和良好耐久性能。其标准扩散度用水量为0.69、初凝时间为37 min、终凝时间为51 min、体积密度为916.67 kg·m-3、拉伸连接强度为0.08 MPa、抗压强度为1.76 MPa；在相对湿度40%~65%的平衡含湿量为0.0620~0.0849 g·g-1；从30℃至15℃的降温时间为610 s,相变平台明显；经过循环试验,吸放湿性能下降了6.44%~9.45%,相变调温性能仅下降了7.2%。

With plastering gypsum as basis material,decanoic acid-palmitic acid-SiO2 phase change and humidity storage composites were mixed with plastering gypsum to prepare decanoic acid-palmitic acid-SiO2/gypsum phase change and humidity storage composites.Basic performance,humidity storage humidity controlling performance, phase change temperature controlling performance and durability performance of decanoic acid-palmitic acid-SiO2/gypsum phase change and humidity storage composites were tested and analyzed.Structural composition and micro-structure of gypsum phase change and humidity storage composites were analyzed by FTIR and SEM.The results show that decanoic acid-palmitic acid-SiO2 phase change and humidity storage composites with mass content of 40wt% can provide the best performance and good durability performance of decanoic acid-palmitic acid-SiO2/gyp-sum phase change and humidity storage composites.The standard diffusion degree of water consumption is 0.69, initial setting time is 37 min,final setting time is 51 min,bulk density is 916.67 kg·m-3,tensile connection strength is 0.08 MPa and compressive strength is 1.76 MPa. Equilibrium moisture content is 0.0620 0.0849 g·g-1 in relative humidity 40% 65%.Cooling time from 30 ℃ to 15 ℃ is 610 s with clear phase change platform.After the cycling test,the moisture absorption performance decline is 6.44% 9.45%,phase change and temperature controlling performance decline is 7.2%.