Super-Elastic Fluorinated Polyurethane Nanofibrous Membranes with Simultaneously Waterproof and Breathable Performance
Super-Elastic Fluorinated Polyurethane Nanofibrous Membranes with Simultaneously Waterproof and Breathable Performance
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同时具有防水和透气性能的超弹性氟化聚氨酯纳米纤维膜
DOI：
10.1021/acsapm.2c00622
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发表时间：
2022-06-29
影响因子：
5
通讯作者：
Ding, Bin
中科院分区：
文献类型：
--
作者：
Li, Yang;Zhang, Xuan;Ding, Bin
摘要：超弹性机械性能和防水透气膜（WBM），可以有效地阻止液态水渗透，但允许水蒸气传输，将是非常需要在极端情况下使用;然而，这种材料的制造仍然是一个主要的障碍。在这里，我们提出了一个简单而有效的策略，通过静电纺丝技术使用超强和高度可拉伸的聚乙烯基可纺材料设计WBMs。非溶剂诱导相分离和电荷耗散的协同作用优化了介孔形成过程，从而调控了WBM的多孔结构。所得到的WBM具有多功能特性，最佳水蒸气透过率为6.3 kg m-2 d-1，出乎意料的耐水性为93.4 kPa，最大载荷强度为15.3 MPa，断裂伸长率为257%，以及基于1000次循环拉伸变形具有超过67%的最大应力残余和85%的高弹性恢复率的理想弹性。此外，纳米纤维膜即使遭受拉伸，仍然保留优异的透气性和防水性能，表明在保护领域中的极端情况下的有竞争力的候选者。
ABSTRACT: Super-elastic mechanical property and waterproof and breathable membranes (WBMs), which could effectively stop liquid water penetration but allow water vapor to transmit, would be highly desirable to use in an extreme situation; however, manufacturing of such materials remains a major roadblock. Herein, we present a simple but effective strategy for designing WBMs using an ultrastrong and highly stretchable polyurethane-based spinnable material via the electrospinning technique. The cooperative action of non-solvent-induced phase separation and charge dissipation optimizes the nanofiber forming process to regulate the porous structure of WBMs. The resulting WBMs present multifunctional properties with an optimum water vapor transmission rate of 6.3 kg m-2 d-1, an unexpected water resistance of 93.4 kPa, a maximum loading strength of 15.3 MPa, and a rupture elongation of 257%, as well as desirable elasticity with over 67% maximum stress residue and a high elastic recovery ratio of 85% based on 1000 cyclic stretching deformations. Moreover, the nanofibrous membranes still reserve excellent breathability and waterproofness performances even though suffering from stretching, indicating a competitive candidate for extreme situations in the protection field.