摘要
以蒙脱土(MMT)为填料,通过溶液共混插层技术制备半纤维素/纳米纤维素/蒙脱土复合膜.研究了蒙脱土用量和复合膜干燥温度等对半纤维素/纳米纤维素/蒙脱土复合膜水蒸气阻隔性、强度性能、透明度和表观颜色的影响,并利用X-射线衍射(XRD)对半纤维素基复合膜的结晶度变化进行了表征.研究表明,MMT对半纤维素基复合膜的水蒸气阻隔特性有明显的改善作用,当MMT用量为0. 4%时,其水蒸气通过率仅为1. 18 g·mm/(m^2·h·kPa),水蒸气阻隔性能比半纤维素/纳米纤维素复合膜提高了53%.且半纤维素基复合膜的抗拉伸强度也随着MMT用量呈上升趋势,但会降低其断裂伸长率.同时,适当提高半纤维素基复合膜制备过程中的干燥温度,也有助于改善半纤维素基复合膜的水蒸气阻隔性能和抗拉伸强度.
Montmorillonite( MMT) reinforced hemicellulose/nanocellulose( HC/NCC) composite film was prepared by the solution casting technique. The effects of the amount of montmorillonite and drying temperature on the water vapor barrier,mechanical strength,transparency,and color of hemicellulose/nanocellulose/montmorillonite( HC/NCC/MMT) composite films were investigated. The crystallinity of hemicellulose-based composite films were characterized by X-ray diffraction( XRD). The results indicated that the water vapor permeability of the composite films were improved when MMT added. The water vapor permeability was only1. 18 g·mm/( m^2·h·kPa),when the amount of MMT was 0. 4%( mass fraction). The water vapor barrier property improves by 53%. The tensile strength of hemicellulose-based composite films increases with the amount of MMT increases,and the elongation of the films at break decreased. Itwas beneficial to improve the water vapor barrier and tensile strength of hemicellulose-based films with higher temperatures.
作者
张仁凤
王永忠
刘玉新
单映真
徐嘉赛
邱卓一
ZHANG Renfeng;WANG Yongzhong;LIU Yuxin;SHAN Yingzhen;XU Jiasai;QIU Zhuoyi(Yunnan Provincial Key Laboratory of Energy Saving in Phosphorus Chemical Engineering and New Phosphorus Materials,Kunming University of Science and Technology,Kunming 650500,China;Faculty of Chemical Engineering,Kunming University of Science and Technology,Kunming 650500,China;Puyang Longfeng Paper Co.Ltd.,Puyang,Henan 457000,China)
出处
《昆明理工大学学报（自然科学版）》
CAS
北大核心
2020年第1期79-84,共6页
Journal of Kunming University of Science and Technology(Natural Science)
基金
国家自然科学基金项目(21466017,31460176)
关键词
蒙脱土
半纤维素
复合膜
水蒸气透过率
强度性能
montmorillonite
hemicellulose
composite films
water vapor permeability
tensile strength
