10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
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Charge and Filtration Characteristics of Novel Porous Fibers
Chih-Te Wang, Shao-Tai Lee, Jia-Hong Wang, Shi Jia-Xi, Chih-Chieh Chen, WEN-YINN LIN, Institute of Environmental Engineering and Management, NTUT
Abstract Number: 144 Working Group: Control and Mitigation
Abstract Filtration is one of the common, economical and effective methods for removing particulate. The electrets of surface in the fiber can achieve low-pressure loss without affecting the efficiency of filtration due to their electrostatic attraction. Previous researches were pointed out that increasing the specific surface area of fiber can increase the charge. At the same time, there were studies that had porous or hollow properties of the fiber can increase the specific surface area. In this study, three kind fibers of smooth, hollow porous and notch porous were prepared by electrostatic spinning. Then, with the charge test, the three fibers were charged by corona discharge method. The results showed that the average surface voltages were -0.82 kV (smooth), -0.90 kV (hollow porous) and -1.10 kV (notch porous), respectively. The highest charge of the porous fiber is due to its high surface area. Besides, experiments on the filtration efficiency of three types of fibers were carried out. Among them, the decrease rate of the perforated fiber penetration rate of the notch porous was more remarkable than that of the smooth and hollow porous fiber. After charging, the average fiber efficiency of smooth fibers increased from 0.16 to 0.29, the hollow porous fiber increased from 0.20 to 0.39, and the groove porous fiber increased from 0.21 to 0.47. The results showed that the charging and filtration quality of the notch porous fibers were better than the smooth and hollow porous fibers. Excellent performances will allow for notch hollow fibers to be easily integrated in the future various industries.