In this paper,using polyvinyl alcohol (PVA) as the solute,deionized water as the solvent,N,N-dimethylacetamide (DMAc) as the non-solvent inducer,a ternary system of “non-solvent inducer (DMAc)-solvent (water)-polymer (PVA)” was constructed.PVA nanofibrous membranes with honeycomb three-dimensional fluffy structure were prepared by electrospinning.The effects of the addition ratios of non-solvent DMAc on the morphological structure,pore size distribution,filtration efficiency and filtration resistance of the PVA nanofibrous membranes were investigated by scanning electron microscopy,capillary flow porometer and mask filter material particulate filtration efficiency tester,respectively.The results showed that the electrospun PVA nanofibers self-assembled to form a honeycomb three-dimensional fluffy structure with the increase of non-solvent inducer DMAc mass ratios in the spinning solution.The mean pore diameter of the PVA nanofibrous membranes increased from 0.3μm to 0.75μm.When the mass ratio of PVA solution to non-solvent DMAc was 1∶1,the filtration efficiencies of PVA nanofibrous membranes for NaCl and DOP aerosol were 97.34% and 95.07%,respectively,and the filtration resistances were 189.8Pa and 207.5Pa,respectively,as well as the corresponding quality factors were 0.0192 and 0.0145,respectively.
[1] Nazarenko Y.Air filtration and sars-cov-2[J].Epidemiology and Health,2020,42:2020049.
[2] Zhang S,Liu H,Yin X,et al.Tailoring mechanically robust poly(m-phenylene isophthalamide) nanofiber/nets for ultrathin high-efficiency air filter[J].Scientific Reports,2017,7:40550.
[3] Yan S,Yu Y,Ma R,et al.The formation of ultrafine polyamide 6 nanofiber membranes with needleless electrospinning for air filtration[J].Polymers for Advanced Technologies,2019,30(7):1635-1643.
[4] Chen J P,Chen S C,Wu X Q,et al.Multilevel structured TPU/PS/PA-6 composite membrane for-high-efficiency airborne particles capture preparation,performance evaluation and mechanism insights[J].Journal of Membrane Science,2021,633:119392.
[5] Gao H,Yang Y,Akampumuza O,et al.A low filtration resis-tance three-dimensional composite membrane fabricated via free surface electrospinning for effective PM2.5 capture[J].Environmental Science:Nano,2017,4(4):864-875.
[6] 刘夏颖,刘兆麟.静电纺聚酰胺6纳米蛛网纤维膜的可控制备[J].国际纺织导报,2022,50(1):8-10.
[7] 张硕,李明慧,王金云,等.原位生长制备ZIF-8/聚酰胺双层复合纳滤膜及其染料分离性能[J].化工新型材料,2021,49(2):91-95.
[8] Song J Z,Bo W L,Zi H X,et al.Hierarchical porous poly(L-lactic acid) nanofibrous membrane for ultrafine particulate aerosol filtration[J].ACS Applied Materials & Interfaces,2019,11:46261-46268.
[9] Zhong L,Wang T,Liu L,et al.Ultra-fine SiO2 nanofilament-based PMIA:a double network membrane for efficient filtration of PM particles[J].Separation and Purification Technology,2018,202:357-364.
[10] Xiao Y,Wang Y,Zhu W,et al.Development of tree-like nanofibrous air filter with durable anti-bacterial property[J].Separation and Purification Technology,2021,259:118135.
[11] 路明磊,张倩,吴立涛,等.静电纺PVA基纤维空气过滤膜制备及过滤性能研究[J].丝绸,2022,59(1):46-50.
[12] 陈鑫,王玉萍,柯勤飞,等.非溶剂诱导相分离制备三维蓬松静电纺材料[J].上海纺织科技,2021,49(2):10-14.
[13] Yan G,Yu J,Qiu Y,et al.Self-assembly of electrospun polymer nanofibers:a general phenomenon generating honeycomb-patterned nanofibrous structures[J].Langmuir,2011,27(8):4285-4289.
[14] 洪贤良,陈小晖,张建青,等.静电纺多级结构空气过滤材料的研究进展[J].纺织学报,2020,41(6):174-182.
基金资助
福建省自然科学基金面上项目(2022J011131);福州市科技重大“揭榜挂帅”项目(2022-ZD-006);福州市长乐区科技重大“揭榜挂帅”项目(CLJBGS20220001);福州市科技创新创业人才培养计划项目(2023-R-002);福建省技术创新重点攻关及产业化项目(2022G037和2023G028);福建省对外合作项目(2022I0045);南平市科技重大“揭榜挂帅”项目(N2021A004);闽江学院校级科技项目(MYK20022)
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