摘要
为了对空气中含毒性的有机气体进行检测,以1-丁基-3-甲基咪唑氯盐离子([BMIm]Cl)液体溶解棉纤维素和壳聚糖得到均相混合溶液,以十二烷基磺酸钠(SDS)改性的多壁碳纳米管(MWCNTs)为导电填料,通过溶液涂覆方法,制备了MWCNTs/天然纤维素-壳聚糖气敏导电复合材料。结果表明:当壳聚糖与棉纤维素的质量比为1∶7,MWCNTs含量在逾渗值(2.8wt%)附近时,该复合材料对甲醇、乙醇、氯仿和丙酮等极性有机溶剂蒸气显示出较好的气敏性和重复使用稳定性,其气敏响应行为表现为典型的负蒸气系数(NVC)效应。
For detecting the toxic vapors in atmosphere,the homogeneous solution was prepared with nature cotton fiber and chitosan in 1-butyl-3-methylimidazolium chloride([BMIm]Cl)ionic liquid.The multiwall carbon nanotubes(MWCNTs)with sodium dodecyl sulfate(SDS)modification were used as the conductve fillers.And MWCNTs/cellulose-chitosan conducting composites used for gas sensor were successfully prepared by using solution coating method.Results show that when the mass ratio of chitosan to cellulose is 1∶7,MWCNTs/cellulose-chitosan composites show better gas-sensing properties,reproducibility and stability for polar organic solvent vapors methanol,ethanol,chloroform and acetone at percolation value of about 2.8wt%.The gas-sensing response behavior of MWCNTs/cellulose-chitosan composites shows typical negative vapor coefficient(NVC)effect.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2014年第4期1121-1126,共6页
Acta Materiae Compositae Sinica
基金
制浆造纸国家重点实验室开放基金(201114)
关键词
气敏材料
多壁碳纳米管
纤维素-壳聚糖
逾渗行为
负蒸气系数效应
复合材料
gas-sensing material
multiwall carbon nanotubes
cellulose-chitosan
percolation behavior
negative vapor coefficient effect
composites
