摘要
以甲酸为溶剂,利用静电纺丝法制备了再生丝素蛋白纳米纤维膜,系统地研究了纺丝液质量分数、纺丝电压、纺丝液流速及接收距离对纤维形貌和直径的影响。结果表明,在制备直径250 nm以下、表面光滑且均匀的纤维时,纺丝液质量分数和电压是影响纤维形貌和直径的2个主要因素,且体积分数90%乙醇溶液处理能促进丝素蛋白纤维的结构从无规卷曲为主向β-折叠构象转变。在优化的工艺条件下制备的丝素蛋白纳米纤维膜,经过后处理后具有较低的吸水性及良好的透湿性,能够承受潮湿的水环境。此外,经过乙醇处理的丝素蛋白纳米纤维膜具有良好的力学性能,其拉伸强度、断裂伸长率和杨氏模量分别为(12.9±3.1)MPa,(10.5±1.9)%和(309±41)MPa。
In this study,electrospinning method was used to fabricate the regenerated Bombyx mori silk fibroin nano-fiber membrane by using formic acid as the solvent.The effects of silk fibroin concentration,applied voltage,flow rate and tip-to-collection plate distance on the fiber morphology and diameter were systematically evaluated.The results showed that both the silk fibroin concentration and the applied voltage were the most important parameters in producing the uniform and smooth cylindrical fibers less than 250 nm in diameter.The conformation of regenerated silk fibroin nano-fiber was transformed from random coil to β-sheet after the post-treatment with 90？%（v/v） ethanol solution.Under the optimal conditions,the as-spun nano-fiber membrane has low water absorption,excellent moisture permeability to keep a suitable humidity environment.Moreover,its tensile strength,breaking strain and tensile modulus values were（12.9±3.1） MPa,（10.5±1.9） % and（309±41） MPa,respectively.
出处
《丝绸》
CAS
北大核心
2011年第1期20-23,共4页
Journal of Silk
基金
教育部新世纪优秀人才支持计划(NCET070763)
关键词
静电纺丝
丝素蛋白
纳米纤维膜
吸水率
透湿率
拉伸模量
Electrospinning
Silk fibroin
Nano-fiber membrane
Water absorption
Moisture permeability
Tensile modulus
