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Weili Shao,Wanli Yue,Gaihuan Ren,Chen Cui,Junpeng Xiong,Ling Wang,Tong Lu,Wanjun Bu,Fan Liu,Jianxin He 한국섬유공학회 2022 Fibers and polymers Vol.23 No.5
Electrospun nanofibers are widely used in air-filtration materials because of their fine fiber diameter, small poresize, and high porosity. However, nanofiber membranes exhibit a dense structure, such that they present a large resistance toany air flow. In this study, we set out to design and develop composite nanofiber materials with fluffy structures, as well asblended structures of coarse and fine fibers, through electrospinning technology. These materials could be used in airfiltration applications, given that they offer high efficiency and low resistance. The results show that, compared with purePAN nanofibers, the diameter of PAN nanofibers doped with CNT decreased from 192.36 to 124.37 nm; when the spinningratio of PS coarse fiber (1053 nm) and PAN/CNT fine fiber is 3:1, the resulting nanofiber membrane materials has an obviousthree-dimensional structure, with a specific surface area of 103.16 m2/g, a pore size of 2.25 μm, and a quality factor of0.0947 Pa-1. Under test conditions featuring an air flow of 32 L/min, and 0.3 μm NaCl aerosol particles, the filtrationefficiency was 99.37 % and the resistance was 35 Pa. Furthermore, the dust-holding capacity of the nanofiber air-filter paperwas found to be almost the same as that of melt-blown air-filter papers. Even after being water-soaked 50 times, the filteringefficiency of the nanofiber air-filter paper was still higher. Interestingly, the nanofiber membrane materials doped with CNTalso exhibited excellent sound-absorption abilities. Thus, the composite nanofiber material could potentially be applied toareas with serious air pollution and high noise pollution.
Zhang Yuan,Shao Junpeng,Zhang Liyuan,Dai Ye,Lai Yinan 보안공학연구지원센터 2015 International Journal of Smart Home Vol.9 No.10
This paper introduces the components and functions of institution aiming at docking capture link of the small satellite manipulator end executor. Putting forward to Euler method and quaternion as the theoretical basis, kinetics of grasping institution the relative position and attitude are modeling and analyzed. The axial tilt grab conditions of the simulation analysis are finished by the ADAMS software. The results of the simulation analysis for the relative position and velocity and the hand-grasp collision force are concluded.