利用静电纺丝制备出玉米醇溶蛋白（zein）/聚乳酸（PLA）复合超细纤维,通过场发射扫描电镜（FE-SEM）观察了不同共混质量比超细纤维的形貌。然后通过对不同共混质量比的超细纤维膜进行红外光谱（FT-IR）和差示扫描量热（DSC）测试,分析比较了不同共混质量比复合超细纤维膜的结构,并进行了力学性能测试。结果表明,PLA的加入提高了zein的可纺性,随着PLA共混质量比的增加,纤维平均直径逐渐增大,从434 nm增大到539 nm。静电纺zein/PLA复合纤维膜的结晶性能随着PLA的加入逐渐变好,且复合超细纤维膜的拉伸破坏应力逐渐增大,从17.1 MPa增大到27.1MPa,拉伸破坏应变也逐渐增加,从34.6%增大到46.2%,力学性能明显得到改善。
Zein and poly-L-lactide（PLA） were dissolved in 1,1,1,3,3,3-hexafluoro-2-propanol（HFIP） to fabricate zein/PLA composite ultrafine fibrous membranes by electrospinning.The morphology of the composite ultrafine fibrous membranes prepared by using different mass ratios of zein and PLA was investigated by field-emission scanning electron microscopy（FE-SEM）.The structure and mechanical properties were characterized with Fourier transform infrared spectrum（FT-IR）,differential scanning calorimetry（DSC） and KES-G1 multi-purpose tensile tester.The results show the electrospun spinnability of zein is improved by PLA.The average diameter of composite ultrafine fibers is increased from 434 nm to 539 nm and the crystallinity of composite ultrafine fibrous membranes increases with the addition of PLA content.Furthermore,The mechanical properties are improved effectively,failure strength is increased from 17.1 MPa to 27.1 MPa and failure elongation is also increased from 34.6% to 46.2%.
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