摘要
以1%(质量分数,下同)蜘蛛丝和9%聚-L-乳酸(PLLA)的混合液为纺丝溶液,采用静电纺丝方法制备了蜘蛛丝/PLLA复合纤维构成的连续纱线。探讨了纺丝温度、卷绕速度、后拉伸倍数等对纤维和纱线的形态结构及力学性能的影响。研究发现,加入蜘蛛丝蛋白后,PLLA复合纱线的强度提高了13%,纤维直径从1.1μm减小到了550nm;加热区温度为150℃时纱线强度最大;卷绕速度为(105±5)r/min时可以实现稳定纺丝;拉伸1.5倍时,纱线断裂强度和初始模量分别提高了66%和92%,断裂伸长率下降。
With a modified electrospinning method,continuous filaments which comprise of uniaxial aligned spidroin/PLLA nanofibers were obtained from the mixed solution of 1% spidroin and 9% poly-L-lactic acid （PLLA）. The dependences on the spinning parameters,such as heating temperature,rotation speed,and post-drawn ratio,of the morphology and mechanical properties of the as-spun filaments,were discussed. The results reveal that the spidroin enhances effectively the strength by 13% and fined the fibers from 1.1 μm without spidroin to 550 nm with 4.55% spidroin. The maximum break stress of the as-spun fiber bundles is found at 150 ℃,and the spinning process is stable and continuous at （105±5） r/min. The break stress and initial modulus of the filament increases by 66% and 92% respectively when the as-spun fiber bundles is post drawn 1.5 times,however,the break strain decreases.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2010年第5期69-72,共4页
Polymer Materials Science & Engineering
基金
教育部科学技术研究重点项目(2006056)
江苏省自然科学基金资助项目(BK2008151)
关键词
静电纺丝
聚-L-乳酸
蜘蛛丝
纤维直径
力学性能
electrospinning
poly-L-lactic acid
spider silk
fiber diameter
mechanical properties
