利用纳米纤维素调控聚对二氧环己酮纤维的耐水解性  

Improving Hydrolysis Resistance of Poly(p-dioxanone)Fiber by Utilizing Cellulose Nanofibers

作　　者：张杰 吴刚[1] 陈思翀[1] 王玉忠[1] Jie Zhang;Gang Wu;Si-chong Chen;Yu-zhong Wang(The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials(MoE),National Engineering Laboratory of Eco-Friendly Polymeric Materials(Sichuan),College of Chemistry,State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610064)

机构地区：[1]四川大学化学学院、环境与火安全高分子材料协同创新中心、环保型高分子材料国家地方联合工程实验室、高分子材料国家重点实验室,成都610064

出　　处：《高分子学报》2023年第11期1753-1761,共9页Acta Polymerica Sinica

基　　金：国家重点研发计划(项目号2021YFB3801904);国家自然科学基金(基金号22075188,U19A2095);中央高校基本科研经费、四川大学机构科研经费(项目号2020SCUNL205);高等学校学科创新引智计划(111计划,项目号B20001)资助.

摘　　要：提高可生物降解纤维存储与使用过程中的耐水解性是其应用中的关键问题之一.采用将纤维素纳米纤维(CNF)与聚对二氧环己酮(PPDO)混合纺丝后拉伸热定型处理的方法,制备了耐水解性明显改善的PPDO/CNF纤维.CNF沿拉伸方向取向,进而有序分布于PPDO纤维的无定形区域中,从而有效抑制了水在无定形区中的扩散.放置8周后,PPDO纤维的断裂强度从(146.0±6.4)MPa下降到(27.3±4.8)MPa,并彻底丧失了打结性能;相比之下,PPDO/CNF-2.0 wt%纤维的断裂强度从(162.9±7.0)MPa仅下降到(105.5±12.7)MPa,打结强度从(129.1±19.4)MPa仅下降到(78.0±4.1)MPa,分别相当于降解前纤维的64.8%和60.4%,仍然可满足一定的应用要求.The application of biodegradable polymer fibers in the disposable fabrics,such as masks,protective clothes and courier packaging,is one of the effective pathways to solve the environmental pollution issues originating from waste fabric.However,improving the hydrolysis resistance of biodegradable fibers during storage and usage process plays a key role in determining the application of the biodegradable fibers.In this study,the poly(p-dioxanone)(PPDO)/cellulose nanofibers(CNF)fibers with excellent hydrolysis resistance were prepared by spinning and stretching.After spinning and stretching,the CNF will orient along the stretching direction,and therefore orderly distributing in the amorphous region of the PPDO fiber,resulting in obvious restriction for the diffusion rate of the water vapor.Compared to the pure PPDO fibers with the same preparation conditions,the PPDO/CNF fibers have been significantly improved in performance retention during stored at 25℃and 60%humidity.After 8 weeks of storage,the breaking strength of the PPDO fibers decreased from(146.0±6.4)MPa to(27.3±4.8)MPa,completely losing the knotting strength.In comparison,the breaking and knotting strengths of the PPDO/CNF-2.0 wt%fiber only decreased from(162.9±7.0)MPa and(129.1±19.4)MPa to(105.5±12.7)MPa and(78.0±4.1)MPa,respectively,which are equivalent to 64.8%and 60.4%of the fibers before hydrolysis,and therefore could still meet application requirements.This work provides a simple and effective strategy for both improving the hydrolysis resistance and mechanical properties of PPDO fibers.

关 键 词：聚对二氧环己酮 纤维素纳米纤维 耐水解性 机械性能 

分 类 号：TQ342[化学工程—化纤工业]