浸渍整理对PAN预氧化纤维/芳纶复合滤料性能影响研究
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摘要
通过以聚四氟乙烯(PTFE)乳液和三聚氰胺甲醛树脂(MF)为主的整理液对制备的针刺聚丙烯腈(PAN)预氧化纤维/芳纶复合滤料进行浸渍处理,提高其过滤性能。研究了浸渍处理对PAN预氧化纤维/芳纶复合滤料外观形态、透气性、拉伸性能、孔径和过滤性能的影响。结果表明,浸渍处理使复合滤料纤维表面形成膜状附着物,断裂强力有所提高,复合滤料透气性和孔径均有明显减小,孔径分布窄而集中;浸渍处理后的复合滤料对不同粒径微粒过滤效率均明显提高,其中对0.3μm和0.5μm微粒过滤效率分别达到65.87%和68.63%,提高最为显著,提高率高达98.94%和85.09%,对2.5μm微粒过滤效率高达98.66%。
In order to enhance the filtration efficiency of pre-oxidized PAN fiber/aramid fiber composite filters prepared by needling,the filters were finished with PTFE and MF resin through impregnation.The effects of impregnation finishing on the morphology,air permeability,tensile properties,pore size and filtration properties of filters were investigated.The results showed that some attachments forming membrane appeared on the fiber surface after impregnation finishing.The tensile strength of filters increased,while the air permeability and pore size decreased significantly.The pore size distribution was narrow and concentrated.Impregnation finishing enhanced the filtration efficiency for particle with various diameters,among of them,the increase ratios of filtration efficiency for 0.3μm and0.5μm particles were the most significant,as high as 98.94%and 85.09%,attained 65.87%and 68.63%,respectively.The filtration efficiency of filters for 2.5μm particles was as high as 98.66%.
In order to enhance the filtration efficiency of pre-oxidized PAN fiber/aramid fiber composite filters prepared by needling,the filters were finished with PTFE and MF resin through impregnation.The effects of impregnation finishing on the morphology,air permeability,tensile properties,pore size and filtration properties of filters were investigated.The results showed that some attachments forming membrane appeared on the fiber surface after impregnation finishing.The tensile strength of filters increased,while the air permeability and pore size decreased significantly.The pore size distribution was narrow and concentrated.Impregnation finishing enhanced the filtration efficiency for particle with various diameters,among of them,the increase ratios of filtration efficiency for 0.3μm and0.5μm particles were the most significant,as high as 98.94%and 85.09%,attained 65.87%and 68.63%,respectively.The filtration efficiency of filters for 2.5μm particles was as high as 98.66%.
引文
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[3] Pyo J,Ock Y,Jeong D,et al.Development of filter-free particle filtration unit utilizing condensational growth:with special emphasis on high-concentration of ultrafine particles[J].Building and Environment,2017,112:200-208.
[4] Liu X,Souzandeh H,Zheng Y,et al.Soy protein isolate/bacterial cellulose composite membranes for high efficiency particulate air filtration[J].Composites Science and Technology,2017,138:124-133.
[5] Araji M T,Ray S D,Leung L.Pilot-study on airborne PM2.5filtration with particle accelerated collision technology in office environments[J].Sustainable Cities and Society,2017,28:101-107.
[6]范静静,周莉,胡洁,等.复合结构防护口罩材料的制备及性能研究[J].材料导报,2015,29(2):50-54.
[7] Jianyong F,Jianchun Z.Preparation and filtration property of hemp-based composite nonwoven[J].Journal of Industrial Textiles,2015,45(2):265-297.
[8] Manzo G M,Wu Y,Chase G G,et al.Comparison of nonwoven glass and stainless steel microfiber media in aerosol coalescence filtration[J].Separation and Purification Technology,2016,162:14-19.
[9] Mukhopadhyay A,Pandit V,Dhawan K.Effect of high temperature on the performance of filter fabric[J].Journal of Industrial Textiles,2016,45(6):1587-1602.
[10]李素勤,邓炳耀,刘庆生,等.发泡涂层对PPS滤料表面性能的影响[J].化工新型材料,2016,44(5):255-257.
[11] Yu Bin,Zhao Xiaoming,Zeng Yuening,et al.The influence of process parameters on needle punched nonwovens investigated using image analysis[J].RSC Advances,2017,7(9):5183-5188.
[12] Hameed N,Sharp J,Nunna S,et al.Structural transformation of polyacrylonitrile fibers during stabilization and low temperature carbonization[J].Polymer Degradation and Stability,2016,128:39-45.
[13]杨玉蓉,闫国民,刘立,等.PAN基碳纤维制备过程中微孔结构的形成与转变[J].材料导报,2014,28(18):74-78.
[14]周冠辰,于斌,韩建,等.玄武岩纤维/聚苯硫醚针刺复合滤料的聚四氟乙烯乳液处理[J].纺织学报,2014,35(8):10-14.