摘要
针对空气过滤纤维材料的过滤效率、阻力和使用寿命难以平衡的问题,采用多喷头静电纺丝技术,制备了不同直径、形貌纤维及不同纤维沉积顺序的聚酰胺6/聚苯乙烯(PA6/PS)复合纳米纤维膜,测试了复合膜的平均孔径及孔隙率,建立了纤维结构与过滤效率及阻力的构效关系;结合扫描电镜表征探讨了不同形貌、直径纤维的叠加次序对过滤寿命及细颗粒物沉积行为的影响,系统研究了过滤风速、细颗粒物尺寸对过滤性能的影响。结果表明:在5.33 cm/s的风速下,以多喷头静电纺丝方式制备的PA6/PS复合膜具有更好的抵抗风速变化的能力,在长期使用中阻力增加较缓慢,其具有93.13%的过滤效率,30.67 Pa的过滤阻力和0.0889 Pa-1的品质因子,综合过滤性能优于同等条件下H10等级(过滤效率>90%)的商业玻璃纤维过滤膜。
Objective Particulate matter in the air poses a significant health risk to humans.Utilizing fibrous materials to filter fine particles is the most prevalent method for golving the problem.Most filtration media struggle to achieve a balance among filtering efficiency,pressure drop,and service life.In order to create effective air filters,the fiber structures must be precisely designed.High-specific-surface-area nanofibers offer better filtering efficiency but greater air resistance.Beaded fibers provide abundant open spaces between fibers and lower air pressure as well as increasing service life.However,few studies have considered the influence of varied fiber sizes and morphologies,and fiber deposition order on filtering performance.Method By controlling the mass concentrations and types of polymers with mass concentrations of 20%polyamide 6(PA6),20%polystyrene(PS20),and 30%PS(PS30),respectively,the single nozzle electrospinning technique was adopted to produce PA6 nanofibers(referred to as PA6 mono-membrane),PS beaded nanofibers(referred to as PS20 single fiber membrane),and PS microfibers(referred to as PS30 single fiber membrane),as well as composite fiber membranes with varying single fiber membrane deposition sequences.A sequentially deposited PA6/PS20/PS30 membrane,a reverse-deposited PS30/PS20/PA6 membrane,and a three-nozzle electrospun PA6-PS20-PS30 membrane were presented.The produced fibrous membranes were tested for initial filtration,filtration performance under variable face velocity,and dust holding.Results PA6 nanofibers had greater filtering efficiency(99.18%)and larger pressure drop(85 Pa).PS20 beaded nanofibers could balance the contradiction between filtration efficiency and air resistance,with the highest quality factor(with filtration efficiency of 78.47%,air resistance of 20 Pa,quality factor of 0.0794 Pa-1)among the three mono-membranes.The pressure drop of PS30 microfibers was the lowest among the three,which was 10 Pa.None of the three mono-membranes can solve the problem of reduced filtr
作者
陈江萍
郭朝阳
张琪骏
吴仁香
钟鹭斌
郑煜铭
CHEN Jiangping;GUO Chaoyang;ZHANG Qijun;WU Renxiang;ZHONG Lubin;ZHENG Yuming(Center for Excellence in Regional Atmospheric Environment,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen,Fujian 361021,China;Key Laboratory of Urban Pollutant Conversion,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen,Fujian 361021,China;University of Chinese Academy of Sciences,Beijing 100049,China;Fujian Key Laboratory of Atmospheric Ozone Pollution Prevention,Xiamen,Fujian 361021,China)
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2024年第1期56-64,共9页
Journal of Textile Research
基金
国家自然科学基金项目(52000167)
厦门市重大科技项目(3502Z20191021)
福建省中科院STS计划项目(N2021T3071)
宁波市科技创新2025重点专项项目(2022Z028)。
关键词
聚酰胺6
聚苯乙烯
多喷头静电纺丝
空气过滤
多层复合滤料
微纳米纤维
串珠结构
polyamide 6
polystyrene
multiple-nozzle electrospinning
air filtration
multi-layer composite filter
micro-nano fiber
beaded structure
