有机添加剂对纤维素基薄膜的结构和性能影响
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关键词：纤维素基薄膜；有机添加剂；结构特性；耐水性能；甘蔗渣
中图分类号：TQ050.4；TB383 文献标志码：A 文章编号：1671-0460（2026）04-0757-07
Effects of Organic Additives on the Structure and Properties of Cellulose-Base Films
XIANG Yuchen 1， CAI Yimin 2， WU Lei 3， CUI Zhangning 3， ZHANG Yanran 3， HE Jiayu 3
School of Chemistry， Sichuan University， Chengdu Sichuan 610065， China;
Institute of Nuclear Science and Technology， Sichuan University， Chengdu Sichuan 610065， China;
3. School of Chemistry and Chemical Engineering， Xi'an University of Architecture and Technology， Xi'an Shaanxi 710055， China）
Abstract： Biodegradable cellulose-based materials are often limited by their strong hydrophilicity and short-fiber composition， which result in poor water resistance and insufficient mechanical properties. Using sugarcane bagasse as precursor， two approaches were employed to incorporate organic additives： blending-plasticization technique involving polyvinyl alcohol （PVA） and urea， and dissolution-regeneration-crosslinking technique using tannic acid （TA）. Consequently， lignin-containing nano-fibrillated cellulose composite films （LCNF/PVA and LCNF/TA） were fabricated， and their water resistance， mechanical properties， and thermal stability were systematically investigated. The results demonstrated that the LCNF/PVA-1 and LCNF/TA-3 composite films exhibited the lowest water absorption rates of 31.74% and 25.88% after 5 h， respectively. However， LCNF/PVA-1 displayed inferior mechanical performance. In contrast， the LCNF/PVA-7 film exhibited significantly enhanced elongation at break and toughness， reaching 126.351% and 26.488 MJ·m -3 ， representing increases of 123.285% and 25.732 MJ·m -3 ， respectively， compared to LCNF/PVA-1. The LCNF/TA-3 film achieved tensile strength of 80.16 MPa， elongation at break of 8.538%， and toughness of 4.102 MJ·m -3 . Additionally， both LCNF/PVA-1 and LCNF/TA-3 exhibited improved thermal stability， with onset decomposition temperatures （ Tonset ） of 301 °C and 275 °C， respectively.
Keywords： Cellulose-base films; Organic additives; Structure characteristic; Water resistance; Bagasse
20 世纪 50 年代以来，廉价、耐用且坚固的聚合物商品塑料在各个领域中得到了广泛的应用，其全球产量逐年增加，平均增长率达到了 9% 左右 [1] ，石油基塑料制品给人类的生活带来了极大便利。（剩余8995字）