Multifunctional composite membrane based on BaTiO3@PU/PSA nanofibers for high-efficiency PM2.5 removal

In this study, a new barium titanate@polyurethane/polysulfonamide (BaTiO3@PU/PSA) composite nanofibrous membrane with comprehensive properties for high temperature filtration and robust PM2.5 removal was successfully fabricated through the blending spinning of PU and PSA and the introduction of BaTiO3. As a consequence, the BaTiO3@PU/PSA membrane achieved the high capture efficiency of 99.99 % for fine particulates, low pressure drop of 39.4 +/- 0.2 Pa, good mechanical property (13.27 MPa), sufficient flexibility, high thermal stability (up to 300 degrees C), favorable flame-retardancy as well as superior chemical resistance against acid and alkali. Especially, to intuitively reveal the relationship between the fiber structure, high temperature environmenL gas velocity and filtration performance of the composite membrane, the filtration processes were carefully investigated through the analog simulation. More importantly, the BaTiO3@PU/PSA membrane exhibited high-efficiency PM2.5 purification capacity, and the removal efficiency kept stable after high temperature, acid or alkali treatment, ascribing to the advantageous structure of PSA, PU and BaTiO3. Overall, the BaTiO3@PU/PSA nanofiber membranes with versatility are a promising high-efficiency candidate for dust removal, particularly in harsh conditions.

在这项研究中，通过PU和PSA的共混纺丝和引入Pt的引入，成功地制造了一种新型的钛酸钡@聚氨酯/聚磺酰胺（BaTiO3 @ PU / PSA）复合纳米纤维膜，该膜具有用于高温过滤和强大的PM2.5去除的综合性能。钛酸钡3。结果，BaTiO3 @ PU / PSA膜对细小颗粒的捕获效率高达99.99％，低压降为39.4 +/- 0.2 Pa，良好的机械性能（13.27 MPa），足够的柔韧性，高的热稳定性（向上至300摄氏度），良好的阻燃性以及对酸和碱的优异化学耐受性。特别是，为了直观地揭示纤维结构，高温环境气体流速和复合膜过滤性能之间的关系，通过模拟模拟对过滤过程进行了仔细研究。更重要的是，BaTiO3 @ PU / PSA膜表现出高效的PM2.5净化能力，高温，酸或碱处理后的去除效率保持稳定，这归因于PSA，PU和BaTiO3的有利结构。总体而言，具有多功能性的BaTiO3 @ PU / PSA纳米纤维膜是一种有希望的高效除尘方法，特别是在恶劣条件下。

Published: 2020

Journal ：JOURNAL OF HAZARDOUS MATERIALS

Impact Factor：9.52

Paper link: https://www.sciencedirect.com/science/article/abs/pii/S0304389420302429