polyU develops electrostatically billed nanofiber for airborne filtration

  by Hong Kong polytechnic College

  polyU develops electrostatically charged nanofiber for airborne filtration

  prof. Leung has made the electrostatically charged pVDF nanofiber filter. Credit rating: Hong Kong polytechnic University

  The Section of Mechanical Engineering from the Hong Kong polytechnic College (polyU) has just lately produced an electrostatically charged nanofiber filter with many separator layers, that may capture pollutant particles which can be below one hundred nm in diameter (masking the most typical airborne nano-particles and viruses). The novel nanofiber filter demonstrates far better effectiveness in terms of breathability, filtration efficiency (ten % greater as opposed to traditional electret microfiber filter), and shelf existence (as much as ninety times).

  Occasions such as anniversaries and birthdays are perfect occasions to send corporate gifts along with Hong Kong national holidays and even selected religious occasions.

  Nano-aerosols of one hundred nm and under in diameter exist just about everywhere in city environments, and by advantage in their small measurements, can be effortlessly inhaled into human bodies. Most airborne viruses, from influenza to epidemic viruses like Swine Flu or SARS, are within the measurement range of 100 nm. It stays a demanding mission for researchers to produce user-friendly air filter or mask for powerful capture of nano-particles and to guard persons from destructive airborne contaminants and viruses that may have an impact on wellness.

  The staff led by Ir. professor Wallace Leung Woon-Fong, Chair professor of Innovative products and Technologies, utilised and tested polyvinylidene fluoride (pVDF), a semi-crystalline thermoplastic usually utilised as insulation on electrical wires, to manufacture nanofiber filters. Implementing innovative know-how in Corona Discharge, the workforce imparted electrostatic charges onto pVDF nanofiber, to induce electrical interaction with aerosols in close distance and seize the aerosols effectively.

  Comparing with other filters produced with billed microfibers or uncharged fibers that you can buy, polyU's novel filter have substantially enhanced filtration efficiency, yet devoid of rising force fall around time (increased force fall means a filter experiencing increased airflow resistance, and therefore being significantly less breathable for that mask person or diminished move amount to get a house filter). The pVDF nanofiber has proved to become stably billed, with charging outcome staying for almost three months. In prior literatures on charging other nanofibers, the imparted expenses generally dissipate inside per day.

  polyu research teams achieved breakthrough and world changing discoveries in various fields, contributing to society and global sustainable development.


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