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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0.0859~0.2310g/g,经过4h对甲醛气体的吸附率接近40%。
Biomass porous activated carbon (PC) was prepared from waste walnut shells. Capric acid (CA) was encapsulated in the pore structure of PC by vacuum adsorption to form capric acid-porous activated carbon (CA-PC). The composite CA-PC / Di-Gy multifunctional composite was prepared by compounding CA-PC with diatomite (Di) and gypsum (Gy), and its thermal, wet and adsorption properties were tested. The multifunctional composite CA-PC / Di-Gy was characterized by BET, FTIR, SEM and DSC techniques, and its structure was analyzed. The results showed that the PC prepared from discarded walnut shell had developed pore structure, which could not only encapsulate CA, but also adsorb formaldehyde. CA-PC / Di-Gy multi-functional composite has good temperature and humidity control performance and adsorption rate, that is, the temperature platform appears near 32 ℃, the relative humidity of 40% to 60% of the equilibrium moisture content of 0.0859 ~ 0.2310 g / g, after 4h formaldehyde gas adsorption rate close to 40%.