摘要
为提升纳米纤维复合过滤材料的过滤效率及膜层间的结合力,通过静电纺丝技术在工业过滤织物上纺制低熔点聚合物纤维和聚酰胺6(PA6)纳米纤维,再与玻璃纤维进行热压成形制备出一种结合牢固的多层纳米纤维复合材料,并研究了其过滤性能,同时通过建立拉力测试法研究了复合材料的层间结合强度。结果表明:复合材料的过滤效率随着PA6纳米纤维膜面密度和聚苯乙烯(PS)微球水溶液起始浊度值的增加而增高,当PA6纳米纤维膜面密度为2.5 g/m^(2)时,该复合材料对直径为1μm的PS微球的过滤效率可达98.9%;复合材料层间结合力随着低熔点聚合物纤维平均直径的增加而增大,当采用茂金属线性低密度聚乙烯纤维时,其结合力可达8.2 N/cm^(2)。
Objective At present,the development of water treatment technology is a global task,because of the water pollution and the shortage of pure water faced by mankind.In consideration of its superior performance,nanofiber composite filtering materials are widely used to efficiently filter micron sized particulate pollutants in sewage.However,how to increase the filtering efficiency and the adhesion between nanofiber layers and how to evaluate the adhesion are crucial.Therefore,this work is set out to prepare the multilayer materials with high filtering efficiency and adhesion between nanofiber layers and to set up test method for the adhesion.Method In this work,a firmly bonded multilayer nanofiber composites was prepared by putting five types of low melting point polymer fibers,which are polyethylene oxide(PEO),polyvinylidene difluoride(PVDF),polystyrene(PS),polymethyl methacrylate(PMMA),metallocene linear low density polyethylene(mLLDPE),together with polyamide 6(PA6)nanofibers on industrial filter fabrics through eletrospun technology pressed with glass fiber at a designed temperature.Meanwhile,a tensile test method was established to measure the bonding strength of multilayer nanocomposites.The effects of the content of PA6 nanofibers of the materials and initial turbidity value of PS microspheres with a diameter of 1μm solution on the filtration efficiency and filtration flux were also studied.Results The low melting point polymer fibers containing PEO,PVDF,PS,PMMA and mLLDPE were made to have different fiber diameters,which are 0.27,0.36,0.42,1.29 and 35.31μm,respectively(Tab.1).The multilayer nanocomposite material was successfully prepared by hot pressing the industrial filter cloth spun with low melting point polymer fiber and glass fiber,and the adhesion between nanofiber layers of the multilayer nanocomposite material was significantly improved compared with the common sandwich materials,increasing from^(2).6 N/cm^(2) to 8.2 N/cm^(2).When the concentration of PS microsphere suspension with a diameter of
作者
安雪
刘太奇
李言
赵小龙
AN Xue;LIU Taiqi;LI Yan;ZHAO Xiaolong(Research Center of Ecomaterial,Beijing Institute of Petrochemical Technology,Beijing 102617,China;College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China)
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2023年第8期50-56,共7页
Journal of Textile Research
