Core–Shell Nanofibrous Materials with High Particulate Matter Removal Efficiencies and Thermally Triggered Flame Retardant Properties,ACS Central Science

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Core–Shell Nanofibrous Materials with High Particulate Matter Removal Efficiencies and Thermally Triggered Flame Retardant Properties
ACS Central Science ( IF 12.7 ) Pub Date : 2018-07-02 00:00:00 , DOI: 10.1021/acscentsci.8b00285
Kai Liu ₁ , Chong Liu ₁ , Po-Chun Hsu ₁ , Jinwei Xu ₁ , Biao Kong ₁ , Tong Wu ₁ , Rufan Zhang ₁ , Guangmin Zhou ₁ , William Huang ₁ , Jie Sun ₁ , Yi Cui _{1,

2}

Affiliation

Dust filtration is a crucial process for industrial waste gas treatment. Great efforts have been devoted to improve the performance of dust filtration filters both in industrial and fundamental research. Conventional air-filtering materials are limited by three key issues: (1) Low filtration efficiency, especially for particulate matter (PM) below 1 μm; (2) large air pressure drops across the filter, which require a high energy input to overcome; and (3) safety hazards such as dust explosions and fires. Here, we have developed a “smart” multifunctional material which can capture PM with high efficiency and an extremely low pressure drop, while possessing a flame retardant design. This multifunctionality is achieved through a core–shell nanofiber design with the polar polymer Nylon-6 as the shell and the flame retardant triphenyl phosphate (TPP) as the core. At 80% optical transmittance, the multifunctional materials showed capture efficiency of 99.00% for PM_2.5 and >99.50% for PM_10–2.5, with a pressure drop of only 0.25 kPa (0.2% of atmospheric pressure) at a flow rate of 0.5 m s^–1. Moreover, during direct ignition tests, the multifunctional materials showed extraordinary flame retardation; the self-extinguishing time of the filtrate-contaminated filter is nearly instantaneous (0 s/g) compared to 150 s/g for unmodified Nylon-6.

中文翻译：

具有高颗粒去除效率和热触发阻燃特性的核壳纳米纤维材料

灰尘过滤是工业废气处理的关键过程。在工业研究和基础研究中，都致力于改善粉尘过滤器的性能。常规的空气过滤材料受到三个关键问题的限制：（1）过滤效率低，特别是对于低于1μm的颗粒物（PM）；（2）过滤器上的大气压下降，需要高能量输入才能克服；（3）爆炸，起火等安全隐患。在这里，我们开发了一种“智能”多功能材料，该材料可以高效捕集PM，并具有极低的压降，同时具有阻燃设计。这种多功能性是通过核-壳纳米纤维设计实现的，其中极性聚合物Nylon-6作为壳，而阻燃性磷酸三苯酯（TPP）作为核。在80％的透光率下，多功能材料对PM的捕获效率为99.00％对于PM _10–2.5，其压降为_2.5和> 99.50％，在0.5 ms ^–1的流速下，压降仅为0.25 kPa（大气压的0.2％）。此外，在直接点火测试中，多功能材料显示出非凡的阻燃性。与未改性的Nylon-6的150 s / g相比，被滤液污染的过滤器的自熄时间几乎是瞬时的（0 s / g）。

更新日期：2018-07-02

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