滤布材质及微观结构与透水性能的关系
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摘要
机织滤布的透水性能会直接影响过滤设备的生产效率。为理清滤布材质、微观结构与过水通量之间的相互关系,定制一批控制变量的滤布用于实验。对不同材质的滤布进行了FTIR,动、静态接触角和表面能测定,从机理分析了材质影响过水通量的关键性指标。对滤布微观结构进行了SEM表征,并分析了编织方式、厚度、孔径对过水通量的影响,建立了滤布微观结构与过水通量的半经验模型。结果表明:材质亲水性大小顺序为聚丙烯>聚碳酸酯>聚酰胺,对应的过水通量分别为6.34、5.75、5.46 m/min,亲水性强的材质具有更大的过水通量;微观结构中,过水通量大小顺序为缎纹滤布>斜纹滤布>平纹滤布,孔径、厚度分别与过水通量呈正、负相关关系,拟合的微观结构与过水通量的半经验模型可以为机织滤布的选型提供理论参考。
The water permeability of woven filter cloth directly affects the production efficiency of filter equipment. In order to clarify the relationship between material, microstructure of filter cloth and water flux,a dozen of woven filter cloth with control variables were customized for the research. FTIR, dynamic and static contact angles and surface energy measurements were used to evaluate the filter cloths of different materials. The key indicators affecting the water flux were analyzed from mechanism. The microstructure of the filter cloth was characterized by SEM, and the influences of weaving method, thickness and pore size on the water flux were analyzed. A semi-empirical model between microstructure of filter cloth and water flux was established. The results show that the hydrophilicity order of material is polypropylene>polycarbonate>polyamide, the corresponding water flux is 6.34, 5.75, 5.46 m/min, respectively. Hydrophilic materials have a larger water flux. The water flux order of filter cloths under different weaving methods is satin filter cloth>twill filter cloth>plain filter cloth. The pore diameter and thickness are positively and negatively correlated with the through-water flux, respectively. The semi-empirical model of fitted microstructure and water flux can provide theoretical reference for the selection of woven filter cloth.
The water permeability of woven filter cloth directly affects the production efficiency of filter equipment. In order to clarify the relationship between material, microstructure of filter cloth and water flux,a dozen of woven filter cloth with control variables were customized for the research. FTIR, dynamic and static contact angles and surface energy measurements were used to evaluate the filter cloths of different materials. The key indicators affecting the water flux were analyzed from mechanism. The microstructure of the filter cloth was characterized by SEM, and the influences of weaving method, thickness and pore size on the water flux were analyzed. A semi-empirical model between microstructure of filter cloth and water flux was established. The results show that the hydrophilicity order of material is polypropylene>polycarbonate>polyamide, the corresponding water flux is 6.34, 5.75, 5.46 m/min, respectively. Hydrophilic materials have a larger water flux. The water flux order of filter cloths under different weaving methods is satin filter cloth>twill filter cloth>plain filter cloth. The pore diameter and thickness are positively and negatively correlated with the through-water flux, respectively. The semi-empirical model of fitted microstructure and water flux can provide theoretical reference for the selection of woven filter cloth.
引文
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[16]Sun Likun(孙立坤).Preparation and anti-pollution performance of PVA/PVAm modified polyester filter cloth composite membrane[D].Dalian:Dalian University of Technology(大连理工大学),2012.
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[19]Mao Chengdong(毛成栋),Wang Chunhui(王春会).Analysis of the relationship between water permeability of woven filter cloth and fabric structure parameters[J].Journal of Liaodong University(辽东学院学报),2009,16(2):170-172.
[20]Zhang Feng(张凤).Research on performance of woven filter cloth and development of database management system[D].Shenyang:Northeastern University(东北大学),2002.
[21]Li Xinhai(李新海),Chen Xinmin(陈新民).Bubble growth rate at gassing interface[J].Chemical Reaction Engineering and Technology(化学反应工程与工艺),1994,6(1):98-102.
[22]Kang Yong(康勇),Luo Xi(罗茜),Hu Xiaomin(胡筱敏),et al.Mechanism of blockage of air bubbles to filter media[J].Filtration and Separation(过滤与分离),2000,10(2):8-10.
[2]Wang Weiyi(王维一).Filtration medium and its selection[M].Beijing:China Textile Press(中国纺织出版社),2008.
[3]Tan Wei(谭蔚),Liu Liyan(刘丽艳),Wei Chuansheng(魏传胜),et al.Production and use of woven filter cloth[J].Chemical Industry and Engineering Progress(化工进展),2002,21(6):420-424.
[4]Du Lihong(都丽红),Zhu Qixin(朱企新),Wang Shiyong(王士勇).Study on permeability and interception accuracy of precision monofilament filter cloth[J].Chemical Engineering(化学工程),2010,38(8):44-47.
[5]Chen L,Zhong Z L,Zhang H J,et al.The influence of heat setting on polypropylene woven filter cloth[J].Advanced Materials Research,2011,332-334:771-774.
[6]Lu W M,Tung K L.Fluid flow through basic weaves of monofilament filter cloth[J].Textile Research Journal,1996,66(5):311-323.
[7]Shao Qixiang(邵启祥).Filtering theory and practice[M].Beijing:National Defense Industry Press(国防工业出版社),1982.
[8]Carman P.Fluid flow through granular beds[J].Chemical Engineering Research and Design,1937,75(1):32-48.
[9]Yu B,Ping C.A fractal permeability model for bi-dispersed porous media[J].International Journal of Heat and Mass Transfer,2002,45(14):2983-2993.
[10]Standardization Administration of the People’s Republic of China(中国国家标准化管理委员会).Determination of bubble point diameter of woven filter cloth:GB 24219-2009[S].Beijing:Standards Press of China(中国标准出版社),2009:1-5.
[11]Standardization Administration of the People’s Republic of China(中国国家标准化管理委员会).Determination of water permeability of woven filter cloth:GB 24119-2009[S].Beijing:Standards Press of China(中国标准出版社),2009:1-4.
[12]Min Qi(闵琪),Zhu Junyue(朱君悦),Duan Yuanyuan(段远源),et al.Experimental system of dynamic wetting by hanging plate method[J].Journal of Engineering Thermophysics(工程热物理学报),2009,30(9):1459-1462.
[13]Qi Jingyu(祁景玉).Modern analytical testing technology[M].Shanghai:Tongji University Press(同济大学出版社),2006.
[14]Pei Ben(裴奔).Preparation and characterization of some hydrophobic surface materials[D].Lanzhou:Northwest Normal University(西北师范大学),2011.
[15]Wang J,Ma P,Zhang C,et al.Fuel filtration properties and mechanism of a novel fibrous filter produced by a melt-process[J].Journal of Membrane Science,2017,526:229-241.
[16]Sun Likun(孙立坤).Preparation and anti-pollution performance of PVA/PVAm modified polyester filter cloth composite membrane[D].Dalian:Dalian University of Technology(大连理工大学),2012.
[17]Bae T H,Tak T M.Effect of TiO2 nanoparticles on fouling mitigation of ultrafiltration membranes for activated sludge filtration[J].Journal of Membrane Science,2005,249(1):1-8.
[18]Shi Xiaoli(石小丽),Ai Li(艾丽),Wang Xitian(王夕恬),et al.UV-irradiated graft modified polypropylene fiber industrial filter cloth and its microstructure and properties[J].Polymer Materials Science and Engineering(高分子材料科学与工程),2015,31(8):102-106.
[19]Mao Chengdong(毛成栋),Wang Chunhui(王春会).Analysis of the relationship between water permeability of woven filter cloth and fabric structure parameters[J].Journal of Liaodong University(辽东学院学报),2009,16(2):170-172.
[20]Zhang Feng(张凤).Research on performance of woven filter cloth and development of database management system[D].Shenyang:Northeastern University(东北大学),2002.
[21]Li Xinhai(李新海),Chen Xinmin(陈新民).Bubble growth rate at gassing interface[J].Chemical Reaction Engineering and Technology(化学反应工程与工艺),1994,6(1):98-102.
[22]Kang Yong(康勇),Luo Xi(罗茜),Hu Xiaomin(胡筱敏),et al.Mechanism of blockage of air bubbles to filter media[J].Filtration and Separation(过滤与分离),2000,10(2):8-10.