聚偏氟乙烯纤维网的制备及性能表征

Preparation and Property Characterization of Polyvinylidene Fluoride Fiber Web

探讨二甲基甲酰胺/丙酮的质量比对所制备聚偏氟乙烯纤维网物理性能的影响。采用静电纺丝工艺制备聚偏氟乙烯纤维网,并测试其微观形貌、结晶度、热性能、防紫外线性能、强伸性能和透气性能。结果表明:二甲基甲酰胺/丙酮为10/0时,形成致密无孔的聚偏氟乙烯膜;随着混合溶剂中丙酮含量的增加,形成具有孔隙的聚偏氟乙烯纤维网,且纤维网的防紫外线性能、透气性能以及热稳定性能显著提高;当二甲基甲酰胺/丙酮为0/10时,无法成网;当二甲基甲酰胺/丙酮为7/3时,聚偏氟乙烯纤维网拥有高的结晶度、强力。认为:在聚偏氟乙烯纤维网的实际应用过程中,可根据不同的性能需求来选择合适的溶剂配比。

The influence of dimethylformamide/acetone mass ratio on mechanical properties of produced polyvinylidene fluoride fiber web was discussed.The polyvinylidene fluoride fiber web was prepared with electrostatic spinning process.Its microtopography,crystalline degree,thermal property,anti-ultraviolet property,breaking&elongation and air permeability were tested.The test results showed that densifying polyvinylidene fluoride membrane was formed without pores,when the ratio of dimethylformamide/acetone was 10/0.As the increase of acetone content in mixed solvent,the polyvinylidene fluoride fiber membrane was formed with pores.The anti-ultraviolet property,air permeability and thermal stability of fiber web were obviously improved.When the ratio of dimethylformamide/acetone was 0/10,the fiber web could not be formed.When the ratio of dimethylformamide/acetone was 7/3,the polyvinylidene fluoride fiber membrane had higher crystalline degree and strength.It is considered that suitable solvent mixing ratio can be selected according to different property requirement in the practical application of polyvinylidene fluoride fiber membrane.