具有螺旋结构的PEO/PHB核壳超细纤维的制备及表征  

Preparation and Characterization of Core(PEO)-Shell(PHB)Microfiber withHelical Structure

作　　者：杜江华[1] 杨婷婷 郭生伟[1] 陈诗华 喻迎春 DU Jianghua;YANG Tingting;GUO Shengwei;CHEN Shihua;YU Yingchun(International Scientific&Technological Cooperation Base of Industrial Waste Recycling and Advanced Materials,School of Materials Science&Engineering,North Minzu University,Key Laboratory of Polymer Materials and Manufacturing Technology,North Minzu University,Yinchuan 750021,China)

机构地区：[1]北方民族大学材料科学与工程学院,工业废弃物循环利用及先进材料国际科技合作基地,北方民族大学高分子材料及制造技术重点实验室,银川750021

出　　处：《材料导报》2020年第24期24165-24169,共5页Materials Reports

基　　金：宁夏自然科学基金(2019AAC03109);宁夏高等学校科学技术研究项目(NGY2017146);北方民族大学研究生创新项目(YCX19101);北方民族大学引进人员科研启动基金。

摘　　要：以三氯甲烷为溶剂,聚β-羟基丁酸酯(PHB)为壳层纺丝液,聚氧乙烯(PEO)为核层纺丝液,采用同轴静电纺丝法制备了具有螺旋结构的PEO/PHB核壳超细纤维,并通过透射电镜(TEM)、全反射傅里叶变换红外光谱仪(ATR-FTIR)、扫描电镜(SEM)、差示扫描量热仪(DSC)、热重分析仪(TGA)对纤维形貌、组成和热性能进行了表征。结果表明:调控纺丝工艺条件,可制备出光滑无孔、螺旋无孔、螺旋多孔的PEO/PHB核壳超细纤维;当纺丝温度为35℃、电压为14 kV、推注速度为0.03 mm/min、接收距离为12 cm、滚筒转速为50 r/min时,可获得直径分布均匀的多孔螺旋结构的PEO/PHB核壳超细纤维;多孔螺旋结构的PEO/PHB核壳超细纤维中PHB组分的起始分解温度和终止分解温度较纯PHB纤维有所提高,热分解速率变化不明显,而PEO组分的起始分解温度较纯PEO纤维有所提高,热分解速率降低,终止分解温度变化不明显。Solutions of two biodegradable polymers,polyoxyethylene(PEO)and poly(β-hydroxybutyrate)(PHB),were individually delivered to the inner and outer channel of a coaxial-tube spinneret for electrospinning to prepare helical structured core-shell microfibers.The morphology,crystallinity and thermal properties of the fibers were characterized by TEM,ATR-FTIR,SEM,DSC and TGA,respectively.The results show that:The core-shell microfibers with smooth,non-porous and porous helix can be obtained by controlling the spinning process.Under electrospinning conditions of temperature 35℃,the voltage 14 kV,injection speed 0.03 mm/min,receiving distance 12 cm,drum speed 50 r/min,the core-shell microfibers with evenly distributed diameter and porous helical structures were fabricated.The starting and termination decomposition temperature of the PHB component in the core-shell microfibers of the porous helical structure were higher than that of the pure PHB fibers,and the change of the thermal decomposition rate was not obvious,while the initial decomposition temperature of the PEO component was higher than that of the pure PEO fibers,the thermal decomposition rate decreased,and the temperature change of the termination decomposition was not obvious.

关 键 词：聚氧乙烯 聚Β-羟基丁酸酯 螺旋结构 同轴电纺 

分 类 号：TQ342[化学工程—化纤工业]