基于生物质吸附效应的石膏基多功能化复合材料制备与性能

摘要

采用废弃核桃壳制备生物质多孔活性炭(PC),利用真空吸附法将癸酸(CA)封装于PC的孔结构中,形成癸酸-多孔活性炭(CA-PC).然后将CA-PC与硅藻土(Di)、石膏(Gy)进行复合制备CA-PC/Di-Gy多功能化复合材料,并对其热性能、湿性能以及吸附性能进行测试.采用BET、FTIR、SEM以及DSC等技术对CA-PC/Di-Gy多功能化复合材料进行表征,并分析其结构.结果表明:以废弃核桃壳制备的PC具有发达的孔隙结构,不仅能够包裹CA,而且可以吸附甲醛.CA-PC/Di-Gy多功能化复合材料具有良好的调温调湿性能与吸附率,即在32℃附近出现温度平台,在相对湿度40%~60%的平衡含湿量为0.0859~0.2310 g/g,经过4 h对甲醛气体的吸附率接近40%.%The waste walnut shell was used to prepare biomass porous carbon (PC).Capric acid (CA) was encapsulated into the PC by vacuum absorption.And the CA-PC composites were prepared.The CA-PC/Di-Gy multi-functional composites were made by CA-PC composites, diatomite (Di) and gypsum (Gy).The thermal property, heat property and moisture property of the CA-PC/Di-Gy multi-functional composites were tested respectively.The prepared samples were characterized by using BET, FTIR, SEM and DSC.The results show that the PC made by waste walnut shell has high developed pore structure which not only can package CA but also can adsorb formaldehyde.The temperature-humidity control property and adsorption rate to formaldehyde of the CA-PC/Di-Gy multi-functional composites are good.The constant temperature platform is about 32℃.The equilibrium moisture content is 0.0859-0.2310 g/g during the 40%-60% reality humidity.And the adsorption effect is close to 40% after 4 h of formaldehyde.