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- 2017
癸酸-棕榈酸-SiO2/石膏相变储湿复合材料的制备及性能
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Abstract:
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 microstructure 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/gypsum 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%. 国家自然科学基金青年基金资助项目（51206002，51403004）；高等学校优秀青年人才基金资助项目（2010SQRL034）
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