Polyvinyl Butyral Modified Polyvinylidene Fluoride Breathable–Waterproof Nanofibrous Membranes with Enhanced Mechanical Performance
Polyvinyl Butyral Modified Polyvinylidene Fluoride Breathable–Waterproof Nanofibrous Membranes with Enhanced Mechanical Performance
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DOI：
10.1002/mame.201600272
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发表时间：
2017-08
影响因子：
3.9
通讯作者：
Min Zhang;Junlu Sheng;Y. Xia;Jianyong Yu;B. Ding
中科院分区：
文献类型：
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作者：
Min Zhang;Junlu Sheng;Y. Xia;Jianyong Yu;B. Ding
静电纺丝纳米纤维膜具有优异的机械性能、透气性和防水性，在防护领域至关重要;然而，在制造此类功能材料方面仍然存在巨大挑战。通过对静电纺丝膜进行热后处理，制备了一种力学性能优良的聚偏氟乙烯（PVdF）/聚乙烯醇缩丁醛（PVB）透气防水膜。PVB的嵌入使原始PVdF纳米纤维膜富集有结合的网络、优化的孔径和孔隙率。复合膜具有10.5MPa的拉伸应力和64.5%的断裂伸长率，约为纯非粘结PVdF膜的4倍。除此之外，PVdF/PVB粘合膜表现出高水蒸气透过率（10.6 kg m-2 d-1）、适度的空气渗透率（9.8 mm s-1）和良好的防水性（58 kPa）的综合性能。此外，这种制造方法的方便性和有效性将允许大规模生产具有稳健机械性能和板应用的PVdF/PVB透气防水纳米纤维膜。
Electrospun nanofibrous membranes with outstanding mechanical property, breathability, and waterproofness are critical in protective fields; however, great challenges still remain in creating such functional materials. A novel polyvinylidene fluoride (PVdF)/polyvinyl butyral (PVB) breathable–waterproof membrane with robust mechanical performance is fabricated by introducing thermal post-treatment into electrospun membranes. Embedding of PVB enriches the pristine PVdF nanofibrous membranes with bonded network, optimized pore size, and porosity. The composite membranes are endowed with robust tensile stress of 10.5 MPa and good breaking elongation of 64.5%, which are about four times that of the pure non-bonded PVdF membranes. Apart from this, the bonded PVdF/PVB membranes express integrated properties of high water vapor transmittance rate (10.6 kg m−2 d−1), modest air permeability (9.8 mm s−1), and good waterproofness (58 kPa). Furthermore, the convenience and efficient of this fabrication process will allow for large-scale production of PVdF/PVB breathable–waterproof nanofibrous membranes with robust mechanical performance and board applications.