SiO_(2)/聚乙二醇200/碳纳米管剪切增稠液浸渍芳纶织物及其复合材料防刺性能  

Preparation and stab-resistance of composites fabricated by aramid fabric impregnated with SiO_(2)/poly(ethylene glycol)200/multi-walled carbon nanotube shear thickening solution

作　　者：贾笑娅 王蕊宁 孙润军 JIA Xiaoya;WANG Ruining;SUN Runjun(School of Textile Science and Engineering,Xi'an Polytechnic University,Xi'an,Shaanxi 710048,China)

机构地区：[1]西安工程大学纺织科学与工程学院,陕西西安710048

出　　处：《纺织学报》2024年第4期151-159,共9页Journal of Textile Research

基　　金：陕西省教育厅重点科学研究计划项目(20JS049)。

摘　　要：为优化高性能织物的防刺性能,采用SiO 2和不同长径比的多壁碳纳米管(MWCNTs)制备多相剪切增稠液(MSTFs),研究MWCNTs的长径比与添加量对剪切增稠液流变性能的影响及MSTFs芳纶复合织物的防刺性能。之后将MSTFs复合织物与碳化硅/聚氨酯(SiC/TPU)涂层织物叠层制备双层防刺复合材料,探究叠层顺序对层合复合材料抗穿刺性能的影响。结果得出:长径比较大的碳纳米管对提高剪切增稠液(STF)的增稠效果更优;随着碳纳米管含量的增加,剪切增稠效果逐渐增强。实验结果表明:MSTFs(0.4%MWCNTs-A)浸渍芳纶织物的最大穿刺载荷较纯STF浸渍芳纶织物提高154.33%;不同叠层结构中以剪切增稠液浸渍织物为面层、SiC/TPU涂层织物为背层的双层复合织物表现出更优的防刺性能。Objective In recent years,flexible stab-resistant materials have gradually replaced traditional hard stab-resistant materials,and high-performance fabrics become an important research object for flexible stab-resistant materials.In order to optimize the stab resistance of high-performance fabrics,reduce the number of stacked layers and the quality,it is necessary to prepare composites with both flexibility and stab resistance properties.Method In this study,multi-phase shear thickening fluids(MSTFs)were prepared by polyethylene glycol 200,SiO_(2) and multi-walled carbon nanotubes(MWCNTs),and the effects of the aspect ratio and addition amount of MWCNTs on rheological properties of STF were studied.A MSTFs composite fabric was prepared by dipping and drying,and a composite fabric was fabricated by coated silicon carbide/thermoplastic polyure-thanes(SiC/TPU)on the aramid fabric.Yarn pull-out test and quasi-static stab test were conducted to evaluate the stab resistance of the composite fabrics.In addition,double layer composite fabrics with the two different composite fabrics were prepared to investigate the effect of the stacking sequence on the stab resistance.Results The study shows that the carbon nanotubes with larger aspect ratio were better in improving the thickening effect of STF,the maximal viscosity of MSTFs(0.4%MWCNTs-A)increased by 52 Pa·s over MSTFs(0.4%MWCNTs-B).and with the increase of the content of MWCNTs,the critical shear rate of the MSTFs became smaller,and the maximum viscosity value was gradually increased.In addition,from the results of yarn pulling-out test and the quasi-static stab resistance test,the performance of composite fabrics were seen to be improved greatly compared to neat fabrics.The MSTFs composite fabrics have more interyarn friction than the pure 68%STF composite fabric,and with the increase of the MWCNTs addition in the MSTFs,the maximum pull-out load between the yarns of the composite fabric increases first and then decreases,and the friction between yarns of MSTFs composi

关 键 词：多壁碳纳米管 多相剪切增稠液 流变 叠层结构 防刺复合材料 芳纶织物 

分 类 号：TB540[理学—物理]