Cargando…
The Effect of Temperature and Humidity on the Filtration Performance of Electret Melt-Blown Nonwovens
Electret melt-blown nonwovens are widely used for air purification due to their low pressure drop and high filtration efficiency. However, the charge stability could be affected by the ambient temperature and humidity, reducing the filtration efficiency, resulting in the electret melt blown filter n...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7662889/ https://www.ncbi.nlm.nih.gov/pubmed/33114665 http://dx.doi.org/10.3390/ma13214774 |
_version_ | 1783609499700953088 |
---|---|
author | Liu, Chao Dai, Zijian He, Bin Ke, Qin-Fei |
author_facet | Liu, Chao Dai, Zijian He, Bin Ke, Qin-Fei |
author_sort | Liu, Chao |
collection | PubMed |
description | Electret melt-blown nonwovens are widely used for air purification due to their low pressure drop and high filtration efficiency. However, the charge stability could be affected by the ambient temperature and humidity, reducing the filtration efficiency, resulting in the electret melt blown filter not providing effective protection. Herein, we used corona charge to prepare electret melt-blown nonwovens and systematically studied the effects of different temperature and humidity on the structure, morphology, filtration performance, and surface potential within 24 h. The effect of treatment temperature and humidity on pressure drop was minimal because the fiber morphology and web structure of melt-blown nonwovens were not damaged. When the treatment temperature was lower than 70 °C, the effect on the filtration efficiency of the sample was small, but when the temperature increased to 90 or 110 °C, the filtration efficiency decreased significantly with the increase of the treatment time, and the surface potential also declined similarly. In conclusion, high temperatures will lead to charge escape and reduce the electrostatic adsorption effect. Furthermore, at the same temperature, increasing relative humidity can accelerate the charge release and make the filtration efficiency drop more. After the sample was treated at 110 °C and 90% relative humidity for 24 h, the filtration efficiency decreased from 95.49% to 38.16% at a flow rate of 14.16 cm s(−1), and the surface potential dropped to the lowest value of −1.01 kV. This result shows that all links of electret melt-blown filter material from raw material to final use should be avoided in high temperature and high humidity conditions to ensure the protection effect. |
format | Online Article Text |
id | pubmed-7662889 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-76628892020-11-14 The Effect of Temperature and Humidity on the Filtration Performance of Electret Melt-Blown Nonwovens Liu, Chao Dai, Zijian He, Bin Ke, Qin-Fei Materials (Basel) Article Electret melt-blown nonwovens are widely used for air purification due to their low pressure drop and high filtration efficiency. However, the charge stability could be affected by the ambient temperature and humidity, reducing the filtration efficiency, resulting in the electret melt blown filter not providing effective protection. Herein, we used corona charge to prepare electret melt-blown nonwovens and systematically studied the effects of different temperature and humidity on the structure, morphology, filtration performance, and surface potential within 24 h. The effect of treatment temperature and humidity on pressure drop was minimal because the fiber morphology and web structure of melt-blown nonwovens were not damaged. When the treatment temperature was lower than 70 °C, the effect on the filtration efficiency of the sample was small, but when the temperature increased to 90 or 110 °C, the filtration efficiency decreased significantly with the increase of the treatment time, and the surface potential also declined similarly. In conclusion, high temperatures will lead to charge escape and reduce the electrostatic adsorption effect. Furthermore, at the same temperature, increasing relative humidity can accelerate the charge release and make the filtration efficiency drop more. After the sample was treated at 110 °C and 90% relative humidity for 24 h, the filtration efficiency decreased from 95.49% to 38.16% at a flow rate of 14.16 cm s(−1), and the surface potential dropped to the lowest value of −1.01 kV. This result shows that all links of electret melt-blown filter material from raw material to final use should be avoided in high temperature and high humidity conditions to ensure the protection effect. MDPI 2020-10-26 /pmc/articles/PMC7662889/ /pubmed/33114665 http://dx.doi.org/10.3390/ma13214774 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Liu, Chao Dai, Zijian He, Bin Ke, Qin-Fei The Effect of Temperature and Humidity on the Filtration Performance of Electret Melt-Blown Nonwovens |
title | The Effect of Temperature and Humidity on the Filtration Performance of Electret Melt-Blown Nonwovens |
title_full | The Effect of Temperature and Humidity on the Filtration Performance of Electret Melt-Blown Nonwovens |
title_fullStr | The Effect of Temperature and Humidity on the Filtration Performance of Electret Melt-Blown Nonwovens |
title_full_unstemmed | The Effect of Temperature and Humidity on the Filtration Performance of Electret Melt-Blown Nonwovens |
title_short | The Effect of Temperature and Humidity on the Filtration Performance of Electret Melt-Blown Nonwovens |
title_sort | effect of temperature and humidity on the filtration performance of electret melt-blown nonwovens |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7662889/ https://www.ncbi.nlm.nih.gov/pubmed/33114665 http://dx.doi.org/10.3390/ma13214774 |
work_keys_str_mv | AT liuchao theeffectoftemperatureandhumidityonthefiltrationperformanceofelectretmeltblownnonwovens AT daizijian theeffectoftemperatureandhumidityonthefiltrationperformanceofelectretmeltblownnonwovens AT hebin theeffectoftemperatureandhumidityonthefiltrationperformanceofelectretmeltblownnonwovens AT keqinfei theeffectoftemperatureandhumidityonthefiltrationperformanceofelectretmeltblownnonwovens AT liuchao effectoftemperatureandhumidityonthefiltrationperformanceofelectretmeltblownnonwovens AT daizijian effectoftemperatureandhumidityonthefiltrationperformanceofelectretmeltblownnonwovens AT hebin effectoftemperatureandhumidityonthefiltrationperformanceofelectretmeltblownnonwovens AT keqinfei effectoftemperatureandhumidityonthefiltrationperformanceofelectretmeltblownnonwovens |