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采用静电纺丝技术分别制备了无规排列和高度取向排列的聚对苯二甲酸乙二醇酯(PET)和PET/CA(柠檬酸)4种纤维膜,对它们的润湿性能和力学性能进行了研究,同时研究了纤维膜厚度对膜的力学性能的影响.研究结果表明,与无规排列的PET纤维膜相比,取向排列的PET纤维膜沿纤维取向方向的力学性能有了很大的提高,而断裂伸长率略有下降;加入柠檬酸(CA)后,PET/CA复合纤维膜的表面水接触角从132.3!减少到0!,且取向排列的纤维膜比无规排列的纤维膜更易润湿;无规排列的复合纤维膜的力学性能因加入CA而大幅下降,取向排列的PET/CA纤维膜沿纤维取向方向的力学性能下降较小,而无规排列的PET/CA纤维膜的断裂伸长率从284.1%增加到444.5%.无规排列纤维膜的力学性能随膜厚度的增加先提高,后来又下降,而取向排列的纤维膜沿纤维取向方向的力学性能随膜厚度增加而单调增加.
Electrospinning techniques were used to fabricate four types of fiber films, polyethylene terephthalate (PET) and PET / CA (citric acid), both arranged randomly and highly oriented. Their wettability and mechanical properties The effects of the thickness of the membrane on the mechanical properties of the membrane were studied.The results show that compared with the randomly arranged PET fiber membrane, the orientation of the PET fiber membrane along the fiber orientation has a great mechanical properties , While the elongation at break slightly decreased. The surface water contact angle of PET / CA composite fiber membrane decreased from 132.3 to 0! After addition of citric acid (CA), and the orientation of the fiber membrane than the random arrangement The mechanical properties of randomly arranged composite membranes decreased significantly due to the addition of CA. The mechanical properties of oriented PET / CA membranes decreased slightly along the direction of fiber orientation, while the random arrangement of PET / CA The elongation at break of the fiber membrane increased from 284.1% to 444.5%. The mechanical properties of the randomly arranged fiber membrane increased with the increase of the membrane thickness, and then decreased. The mechanical properties of the aligned fiber membrane along the fiber orientation varied with the membrane Thickness increases monotonically.