摘要
壳聚糖(CTS)是一种碱性多糖,其氨基能结合溶液中的质子,形成的铵正离子与羰基发生希夫碱反应,羧甲基纤维素钠(CMC)是一种良好的吸湿材料,二氧化锰可以催化甲醛发生化学反应。以CTS和CMC为基质,同时复合一定量无机盐(K2CO3),在外层包裹二氧化锰得到功能材料。30 g的功能材料可以将0.08 m3密闭环境箱内初始质量浓度为1 000μg/m3的甲醛在24 h内降至216μg/m3,连续使用3次吸附效果明显。在70%湿度下吸湿量达45%,且吸湿后的功能材料吸附效果更好。
Chitosan(CTS) is an alkaline polysaccharide,whose amino-group combined with proton in solution can form ammonium cations,which can take Schiff base reaction with carbonyl.Sodium carboxymethyl cellulose(CMC) is a good matrix to absorb water.Selecting CTS and CMC as matrix,adding into some inorganic salt K2CO3 and coating MnO2 outside to get the functional material.30 g material can degrade the concentration of formaldehyde from 1 000 μg/m^3 to 216 μg/m^3 in a 0.08 m^3 box during 24 h,and the material can be used 3 times or more.The material exhibits very good moisture absorption under a high humidity(70%RH),can reach up to 45%.Its absorption of water can improve the effect of formaldehyde absorption.
出处
《华东理工大学学报(自然科学版)》
CAS
CSCD
北大核心
2010年第3期401-405,共5页
Journal of East China University of Science and Technology
基金
国家十一五科技支撑项目(2006BAK20B01)
关键词
壳聚糖
羧甲基纤维素钠
无机盐
吸湿
甲醛
chitosan
sodium carboxymethyl cellulose
inorganic salt
water absorption
formaldehyde
作者简介
张文清(1969-),女,山东人,教授,博士,主要从事天然产物的研究。E-mail:zhwqing@ecust.edu.cn
通讯联系人:夏玮,E-mail:xiawei1999@ecust.edu.cn