聚乳酸/百里酚抗菌纤维的制备与性能  

Preparation and properties of polylactic acid/thymol antibacterial fibers

作　　者：陈欢欢 陈凯凯 杨慕容 薛昊龙 高伟洪 肖长发 CHEN Huanhuan;CHEN Kaikai;YANG Murong;XUE Haolong;GAO Weihong;XIAO Changfa(School of Textiles and Fashion,Shanghai University of Engineering Science,Shanghai 201620,China;School of Material Science and Engineering,Tiangong University,Tianjin 300387,China)

机构地区：[1]上海工程技术大学纺织服装学院,上海201620 [2]天津工业大学材料科学与工程学院,天津300387

出　　处：《纺织学报》2023年第2期34-43,共10页Journal of Textile Research

基　　金：国家自然科学基金青年基金项目(52103035)。

摘　　要：为开发一种绿色环保可降解的抗菌纤维,将具有良好生物可降解性的聚乳酸(PLA)与天然抗菌剂百里酚采用温控共混装置混合均匀后,利用熔融纺丝法制备PLA抗菌纤维。借助扫描电子显微镜、傅里叶变换红外光谱仪、X射线衍射仪、单纤维强力测试仪及综合热分析仪等研究了不同质量分数百里酚对PLA抗菌纤维表观形貌、化学结构、结晶结构、热学以及力学性能的影响,并利用振荡烧瓶法测试纤维的抗菌性能。结果表明:在成纤过程中,百里酚会附着在纤维外表面发挥抗菌作用;随着百里酚质量分数的增加,PLA抗菌纤维的热分解温度和熔融温度逐渐降低,断裂伸长率先增加后缓慢减小,最高可达320.98%,是纯PLA纤维的50~90倍;另外,随着百里酚质量分数的增加,PLA抗菌纤维的结晶度逐渐增大;当百里酚质量分数大于15%时,PLA抗菌纤维的抑菌率达到99.99%以上,可完全抑制金黄色葡萄球菌和大肠杆菌的生长。Objective With the frequent occurrence of global acute infectious disease outbreaks,people are increasingly aware of individual protection.In order to protect textiles from microbial contamination and protect human health,it is important to endow textiles with antibacterial properties.However,with the gradual deterioration of white pollution,biodegradable environment-friendly polymer materials are receiving more and more attentions from researchers worldwide.Therefore,this research is committed to develop a green antibacterial fiber.Method Polylactic acid(PLA)with good biodegradability and the natural antibacterial agent thymol were mixed evenly using a temperature control blending device before the PLA antibacterial fibers were prepared by melt spinning.The apparent morphology,chemical structure,crystallization,thermal and mechanical properties of PLA antimicrobial fibers with different thymol mass fraction were investigated by scanning electron microscopy,Fourier infrared spectroscopy,X-ray diffraction,single fibers strength meter and comprehensive thermal analyzer.The antibacterial properties of the fibers were tested by using oscillatory flask method.Results After the addition of thymol,the two phases of PLA and thymol were interconnected without any obvious interface,and the two phase assembly led to good overall dispersion of thymol particles in the fibers,and excellent the compatibility between PLA and thymol,as evidenced in Fig.2.In this study,the characteristic peak of C—H bending vibration on the benzene ring appeared at 800 cm^(-1).The hydroxyl group of thymol can interact with the carbonyl group in PLA to form valence bonds,indicating the existence of chemical bonding interactions between thymol and PLA matrix.Furthermore,the electron microscopic morphology results indicated that the chemical bonding between thymol and PLA promotes their dispersion,as shown in Fig.4.As the mass fraction of thymol increases,the melting temperature of PLA antibacterial fibers gradually decreases(as shown in Fig.5).The

关 键 词：聚乳酸 百里酚 抗菌纤维 熔融纺丝 生物可降解纤维 力学性能 

分 类 号：TS151[轻工技术与工程—纺织材料与纺织品设计] TQ342[轻工技术与工程—纺织科学与工程]