梯度孔隙结构二醋酸纤维复合滤料的制备及过滤性能
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摘要
采用静电纺丝技术制备了多孔和无孔二醋酸纳米纤维,并将其按照不同比例先后沉积于聚丙烯(PP)纺粘非织造布上,制备出具有梯度孔隙结构的复合滤料。通过改变多孔二醋酸纤维的纺丝时间调控2种纤维的比例,探究了不同纤维比例下滤料的过滤性能。当无孔/多孔纺丝液体积比为1/1时,复合滤料的品质因数最高,达到0. 084 Pa-1,此时对2μm及以上粒子的过滤效率达到99. 57%,过滤阻力仅为65 Pa,达到了一级PM2. 5防护口罩的标准。
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 nonwoven 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.
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 nonwoven 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.
引文
[1]Zhang R J,Jing J,Tao J,et al.Chemical characterization and source apportionment of PM2.5 in Beijing:Seasonal perspective[J].Atmospheric Chemistry and Physics,2013,13(4):7053-7074.
[2]高阳,蔡志江.静电纺丝纳米纤维在过滤材料中的应用研究进展[J].高分子通报,2013(12):15-20.
[3]张丽,蒙冉菊,高慧英,等.静电纺纳米纤维空气过滤材料研究进展[J].纺织科技进展,2016(6):18-22.
[4]Sambaer W,Zatloukal M,Kimmer D. 3D modeling of filtration process via polyurethane nanofiber based nonwoven filters prepared by electrospinning process[J].Chemical Engineering Science,2011,66(4):613-623.
[5]Li P,Wang C,Li Z,et al.Hierarchical carbon-nanotube/quartz-fiber films with gradient nanostructures for high efficiency and long service life air filters[J].Rsc Advances,2014,4(96):54115-54121.
[6]张恒,甄琪,王俊南,等.梯度结构耐高温纤维过滤材料的结构与性能[J].纺织学报,2016,37(5):17-22.
[7]朱平平,杨海洋,何平笙.如何理解混合溶剂的良、劣性[J].高分子通报,2004(5):93-98.
[8]张金宁,宋明玉,何慢,等.多孔超细醋酸纤维/涤纶非织造布复合滤材的制备及性能[J].高分子材料科学与工程,2017,33(2):117-122.
[9]Nicosia A,Keppler T,Mueller F A.Cellulose acetate nanofiber electrospun on nylon substrate as novel composite matrix for efficient,heat-resistant,air filters[J]. Chemical Engineering Science,2016,153:284-294.
[2]高阳,蔡志江.静电纺丝纳米纤维在过滤材料中的应用研究进展[J].高分子通报,2013(12):15-20.
[3]张丽,蒙冉菊,高慧英,等.静电纺纳米纤维空气过滤材料研究进展[J].纺织科技进展,2016(6):18-22.
[4]Sambaer W,Zatloukal M,Kimmer D. 3D modeling of filtration process via polyurethane nanofiber based nonwoven filters prepared by electrospinning process[J].Chemical Engineering Science,2011,66(4):613-623.
[5]Li P,Wang C,Li Z,et al.Hierarchical carbon-nanotube/quartz-fiber films with gradient nanostructures for high efficiency and long service life air filters[J].Rsc Advances,2014,4(96):54115-54121.
[6]张恒,甄琪,王俊南,等.梯度结构耐高温纤维过滤材料的结构与性能[J].纺织学报,2016,37(5):17-22.
[7]朱平平,杨海洋,何平笙.如何理解混合溶剂的良、劣性[J].高分子通报,2004(5):93-98.
[8]张金宁,宋明玉,何慢,等.多孔超细醋酸纤维/涤纶非织造布复合滤材的制备及性能[J].高分子材料科学与工程,2017,33(2):117-122.
[9]Nicosia A,Keppler T,Mueller F A.Cellulose acetate nanofiber electrospun on nylon substrate as novel composite matrix for efficient,heat-resistant,air filters[J]. Chemical Engineering Science,2016,153:284-294.