To improve breathability and increase filtering efficiency at the same time, Dr. Leung of Hong Kong Polytechnic University wants to create masks and respirators that use multiple layers of nanofibers. He received a United States patent last year, and "a number of companies have approached us," he said.
为了改善透气性,同时增强过滤效率,香港理工大学的梁博士想发明出使用多层纳米纤维的口罩和呼吸防护罩。去年,他在美国获得了一项专利。“已经有多家公司跟我们接洽了,”他说。
Another issue is that while N95 respirators guard against small particles, they do not combat another form of traffic-related pollution: gases like nitrogen oxides or volatile organic compounds.
另一个问题是,尽管N95防护罩能阻挡细颗粒物,它们却无法抵御另一种与交通有关的污染:像氮氧化物这样的气体或挥发性有机化合物。
Some companies have created cartridges that can connect to certain respirators to block some gases. But they are expensive and cumbersome — and, Dr. Leung said, not a good choice for the public in Asia.
一些企业已经研制出了能和特定的呼吸防护罩相连以阻挡部分气体的滤芯。但它们很贵,而且很笨重。梁博士说,对亚洲的民众而言,它们不是很好的选择。
Dr. Leung hopes to create a system that uses sunlight and oxygen to turn nitrogen oxides and volatile organic compounds into "harmless substances, like carbon dioxide or water." Eventually, he hopes to be able to join it to a regular, particle-filtering respirator.
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2020-09-15
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