Preparation and Properties of Regenerated Cellulose/Amylopectin Blend Fibers from 1-Butyl-3-Methylimidazolium Chloride with Controlled Biodegradation  

以1-丁基-3-甲基咪唑氯盐为溶剂制备生物降解可控的再生纤维素/支链淀粉共混纤维

作　　者：KUMI Alex Kwasi FAN Ruiling ZHANG Yue CHEN Ye ZHANG Yumei KUMI Alex Kwasi;范瑞玲;张玥;陈烨;张玉梅(东华大学材料科学与工程学院纤维材料改性国家重点实验室,上海201620)

机构地区：[1]State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Donghua University,Shanghai 201620,China

出　　处：《Journal of Donghua University(English Edition)》2024年第5期461-473,共13页东华大学学报（英文版）

摘　　要：Regenerated cellulose/amylopectin blend fibers with controlled biodegradation were produced using dry-jet wet-spinning technology from cellulose/amylopectin/1-butyl-3-methylimidazolium chloride blends.Morphological,structural and chemical analyses revealed that dense,homogeneous and void-free blend fibers were prepared in a two-stage dissolution process.The blend fibers were regenerated from water and treated with water or 95%(volume fraction)ethanol.However,cellulose-amylopectin interactions caused crystalline rearrangements in the blend fibers,resulting in a general decrease in crystallinity.Generally,tensile properties decreased with increasing amylopectin content,except that the blend fibers with 10%(mass fraction)amylopectin exhibited higher tensile strength than the regenerated cellulose control fibers.Ethanol treatment reduced the hydrophilicity of the blend fibers,increasing the crystallinity of the blend fibers.The blend fibers exhibited remarkable degradation,directly proportional to the amylopectin content.Despite higher crystallinity,ethanol-treated blend fibers degraded faster than water-treated fibers,indicating amylopectin and ethanol regulated the degradation.以纤维素/支链淀粉/1-丁基-3-甲基咪唑氯盐离子液体为原料,采用干喷湿纺技术制备了生物降解可控的再生纤维素/支链淀粉共混纤维。形态、结构和化学分析结果表明,经两阶段溶解过程,成功制得致密、均匀、无孔洞的共混纤维。该共混纤维以水为凝固浴制得,并经水或95%(体积分数)乙醇处理。共混纤维中存在因纤维素与支链淀粉相互作用引起的结晶重排现象,导致结晶度普遍降低。除支链淀粉的质量分数为10%的共混纤维拉伸强度高于纯纤维素纤维外,随着支链淀粉质量分数增加,共混纤维拉伸强度下降。乙醇处理可减少共混纤维的亲水性,并提高共混纤维的结晶度。此外,共混纤维的降解速率与其所含支链淀粉质量分数成正比关系。尽管具有较高结晶度,但经乙醇处理的共混纤维比经水处理的具有更高的降解速率。这说明了支链淀粉和乙醇在调节降解过程中发挥了作用。

关 键 词：cellulose/amylopectin blend fiber CELLULOSE AMYLOPECTIN 1-butyl-3-methylimidazolium chloride ethanol 

分 类 号：TQ341[化学工程—化纤工业]