摘要
本文以二醋酸纤维素(CDA)为骨架材料、聚乙二醇(PEG)为相变材料,采用溶剂共混-铺膜法制备了PEG/CDA膜状复合降温材料,研究了铺膜厚度、干燥条件和铸膜液组成等对PEG/CDA膜状复合降温材料的物化性能和降温性能的影响。PEG/CDA膜状复合降温材料的最优制备方法为:将1.6 g PEG1500和1.0 g CDA溶于7.4 g丙酮溶剂中,然后在75℃水浴中搅拌冷凝回流6 h得到铸膜液;使用铺膜仪将铸膜液在洁净的玻璃板上铺成400μm厚的液膜,然后在常温干燥箱中干燥12 h,得到PEG/CDA膜状复合降温材料;最后将得到的膜状复合降温材料裁切成160 mm×16 mm的长条,通过折叠制成降温元件。该降温元件能稳定地将加热卷烟的主流烟气温度从67℃降低到42℃,接装纸温度从59℃降低到50℃,具有优良的使用安全性和良好的工业应用前景。在PEG1500/CDA膜状复合降温材料中,PEG1500均匀地负载在CDA形成的骨架网络结构中,当加热卷烟抽吸时,负载在CDA网状结构中的PEG1500结晶就会发生相变吸热,但CDA网络结构将PEG1500的热运动限制在有限空间内,使得PEG1500不会渗出网络结构,在宏观条件下呈现出固固相变的特征。
In this paper,cellulose diacetate(CDA)was employed as the skeleton material and polyethylene glycol(PEG)as the phase change material to fabricate a PEG/CDA membrane composite cooling material via solvent blending and membrane casting.The effects of casting thickness,drying conditions,and casting solution composition on the physicochemical properties and cooling performance of the composite were investigated.The optimal preparation process was as follows:1.6 g PEG1500 and 1.0 g CDA were dissolved in 7.4 g acetone,and the mixture was stirred and refluxed in a 75℃water bath for 6 h to obtain the casting solution.A membrane casting instrument spread the solution into a 400μm liquid film on a clean glass plate,which was then dried at room temperature for 12 h in a drying oven to yield the PEG1500/CDA composite.Subsequently,the composite was cut into 160 mm×16 mm strips and folded to form cooling elements.These elements stably reduced the mainstream smoke temperature of heated tobacco products from 67℃to 42℃and the tipping paper temperature from 59℃to 50℃,demonstrating excellent operational safety and promising industrial application prospects.In the composite,PEG1500 is uniformly loaded in the CDA-derived skeleton network.During the smoking of heated tobacco products,PEG1500 crystals in the network absorb heat via phase change,while the CDA network restricts the thermal motion of PEG1500 within a confined space.Consequently,PEG1500 does not leak,exhibiting solid-solid phase change characteristics under macroscopic conditions.
作者
卢昕博
张子乐
徐建
蒋健
董晨晓
肖卫强
孙搴慧
郭杨龙
LU Xinbo;ZHANG Zile;XU Jian;JIANG Jian;DONG Chenxiao;XIAO Weiqiang;SUN Qianhui;GUO Yanglong(China Tobacco Zhejiang Industrial Co.Ltd,Hangzhou 310008,China;Research Institute of Industrial Catalysis,East China University of Science and Technology,Shanghai 200237,China)
出处
《华东理工大学学报(自然科学版)》
北大核心
2025年第6期748-756,共9页
Journal of East China University of Science and Technology
关键词
加热卷烟
聚乙二醇
二醋酸纤维素
膜状复合降温材料
主流烟气温度
heated tobacco product
polyethylene glycol
cellulose diacetate
membrane composite cooling material
temperature of the mainstream smoke
