Wen Liang1, Yuan Xu1, Xiao Li1, Xiao-Xiong Wang1, Hong-Di Zhang1, Miao Yu1,2,3, Seeram Ramakrishna1,4, Yun-Ze Long5,6. 1. Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao, 266071, China. 2. Qingdao Junada Technology Co., Ltd, Qingdao International Academician Park, Qingdao, 266199, China. 3. Department of Mechanical Engineering, Columbia University, New York, NY, 10027, USA. 4. Center for Nanofibers & Nanotechnology, Faculty of Engineering, National University of Singapore, Singapore, Singapore. 5. Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao, 266071, China. yunze.long@163.com. 6. Collaborative Innovation Center for Eco-Textiles of Shandong Province, Qingdao University, Qingdao, 266071, China. yunze.long@163.com.
Abstract
Fine particulate matter (PM) has seriously affected human life, such as affecting human health, climate, and ecological environment. Recently, many researchers use electrospinning to prepare nanofiber air filters for effective removal of fine particle matter. However, electrospinning of the polymer fibers onto the window screen uniformly is only achieved in the laboratory, and the realization of industrialization is still very challenging. Here, we report an electrospinning method using a rotating bead spinneret for large-scale electrospinning of thermoplastic polyurethane (TPU) onto conductive mesh with high productivity of 1000 m2/day. By changing the concentration of TPU in the polymer solution, PM2.5 removal efficiency of nanofiber-based air filter can be up to 99.654% with good optical transparency of 60%, and the contact angle and the ventilation rate of the nanofiber-based air filter is 128.5° and 3480 mm/s, respectively. After 10 times of filtration, the removal efficiency is only reduced by 1.6%. This transparent air filter based on TPU nanofibers has excellent filtration efficiency and ventilation rate, which can effectively ensure indoor air quality of the residential buildings.
Fine particulate matter (PM) has seriously affected human life, such as affecting n class="Species">human health, climate, and ecological environment. Recently, many researchers use electrospinning to prepare nanofiber air filters for effective removal of fine particle matter. However, electrospinning of the polymerfibers onto the window screen uniformly is only achieved in the laboratory, and the realization of industrialization is still very challenging. Here, we report an electrospinning method using a rotating bead spinneret for large-scale electrospinning of thermoplastic polyurethane (TPU) onto conductive mesh with high productivity of 1000 m2/day. By changing the concentration of TPU in the polymer solution, PM2.5 removal efficiency of nanofiber-based air filter can be up to 99.654% with good optical transparency of 60%, and the contact angle and the ventilation rate of the nanofiber-based air filter is 128.5° and 3480 mm/s, respectively. After 10 times of filtration, the removal efficiency is only reduced by 1.6%. This transparent air filter based on TPU nanofibers has excellent filtration efficiency and ventilation rate, which can effectively ensure indoor air quality of the residential buildings.
Entities:
Keywords:
Air filter; Electrospinning; Nanofibers; PM2.5; Removal efficiency