Abstract: Porous and nonporous cellulose diacetate fibers are prepared in different spinning solution system by electro-spinning.They are in turn deposited in accordance with different proportions onto a layer of PP spun-bond non-woven to make composite filter materials with pore diameter gradient structure.The different ratio between porous and nonporous fibers in filter materials are adjusted by changing spinning time of cellulose porous fibers and therefore the filtration performance of filter materials with different ratios are explored.It is shown that the quality factor of composite filter materials has the maximum value,0.084 Pa-1 when the ratio between porous and nonporous spinning solution dosage is 1:1.Besides,the filtration efficiency of such filter materials can reach 99.57% against the particles with a diameter not less than 2 μm while the filtering resistance is 65 Pa only,meeting the demand for grade first PM2.5 protecting mask.
陈亚君, 汪帝, 李大伟, 魏取福. 梯度孔隙结构二醋酸纤维复合滤料的制备及过滤性能[J]. 现代化工, 2019, 39(2): 136-139.
CHEN Ya-jun, WANG Di, LI Da-wei, WEI Qu-fu. Fabrication of cellulose diacetate composite filter material with pore diameter gradient structure and filtration performance. Modern Chemical Industry, 2019, 39(2): 136-139.
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