纤维素/木质素微球抗紫外薄膜制备与性能研究  

Fabrication and characterization of cellulose/lignin microspheres films with UV-blocking

作　　者：万玉玲 胡雨璐 许杜鑫 黄剑波 许凤[1] 吴玉英[1] 张学铭[1] WAN Yu-ling;HU Yu-lu;XU Du-xin;HUANG Jian-bo;XU Feng;WU Yu-ying;ZHANG Xue-ming(Beijing Key Laboratory of Lignocellulosic Chemistry,Beijing Forestry University,Beijing 100083,China)

机构地区：[1]北京林业大学木质纤维素化学北京重点实验室,北京100083

出　　处：《材料工程》2021年第7期56-63,共8页Journal of Materials Engineering

基　　金：国家重点研发计划项目(2017YFD0601004)。

摘　　要：随着包装工业的快速发展和人类社会对环保要求的提高,功能性且可生物降解的包装膜材料越来越受到人们的重视。然而,目前市场上的可降解包装膜材料由于成本较高、力学性能差以及耐水性低而限制了其发展。采用自组装方法制备木质素微球,并将其沉积在纤维素膜表面,制备出一种新型纤维素基抗紫外薄膜材料。通过扫描电子显微镜(SEM)、红外光谱(FTIR)和激光共聚焦电子显微镜对薄膜的表面性能进行研究。利用抗张实验和紫外透光率测试对纤维素基功能薄膜的力学性能和抗紫外性能进行表征。结果表明:自沉积木质素微球在纤维素膜表面分布均匀,尺寸为1~2μm;纤维素薄膜疏水改性后有助于木质素微球的沉积,且沉积量随着木质素质量浓度的增加而增大。由于木质素微球的引入,纤维素复合膜的抗张强度比对照样增加22%,同时其对UVB屏蔽效果可达94%。With the rapid development of packaging industry and the improvement of environmental protection requirements of human society,biodegradable functional packaging film materials have attracted great attention.However,commercial biodegradable functional package film materials have been constrained by its high cost,low mechanical properties and water resistance.The lignin microspheres were firstly prepared by self-assembling and were adhered to the surface of cellulose film via self-depositing,resulting in fabrication of novel cellulose-based UV-blocking film materials.Subsequently,the surface morphology,ultraviolet resistance and mechanical properties of the obtained functional film materials were studied.The surface properties of films were investigated by scanning microscopy(SEM),infrared spectroscopy(FTIR)and confocal laser scanning microscopy.The mechanical properties and UV resistance of cellulose based films were characterized by tensile test and UV transmittance test.It is noteworthy that the lignin microspheres with 1-2μm in size are uniformly distributed on cellulose films and hydrophobic modification of cellulose-based films facilitated the deposition of lignin.Moreover,the deposited contents of lignin microspheres increase with the increase of the lignin concentration in solution.Due to the introduction of lignin microspheres,the strength of cellulose composites film increases by 22%and the UVB-shielding capacity reaches 94%as compared with the controlled cellulose films.

关 键 词：木质素微球 纤维素膜 抗紫外性能 包装材料 

分 类 号：TS721[轻工技术与工程—制浆造纸工程]