为了制备改性魔芋葡甘聚糖(TDKGM)/生物可降解聚酯纳米复合纤维,以TDKGM和生物可降解聚酯(BP)为原料,三氟乙酸为溶剂,调节TDKGM和BP共混比例,采用静电纺丝方法分别制备了TDKGM/聚乳酸(PLA)、TDKGM/聚丁二酸丁二醇酯(PBS)纳米复合纤维.探讨了TDKGM与可降解聚酯共混比例对纺丝溶液的电导率、表面张力、流变性以及复合纤维直径、形貌和力学强度的影响.随着BP的增加,TDKGM/PLA共混液的表面张力从22.2 N/m降至18.2N/m,电导率从69.7 μS/m下降至39.1μS/m;TDKGM/PBS共混液的表面张力从22.8 N/m降低到17.0 N/m;储能模量、损耗模量、剪切黏度都随之降低;而TDKGM/PBS共混液的电导率变化不成线性规律.当TDKGM/PLA比例为5∶5、TDKGM/PBS比例为6∶4时得到的纤雏形貌最为理想,纳米复合纤维的直径分布在400～600 nm,100～ 500 nm范围,纤维膜的拉伸强度分别为3.557 MPa,4.543 MPa.TDKGM和BP共混比例将影响共混液的电导率、表面张力、流变性,从而影响静电纺丝复合纤维直径分布和形貌,通过控制TDKGM和BP共混比例可以成功地纺丝出纤维直径可控、强度高的TDKGM/BP纳米复合纤维.
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