剪切增稠液—碳纤维复合材料的制备与性能研究

发布时间：2018-06-15 00:39

本文选题：剪切增稠液 + 防护材料　；参考：《大连理工大学》2015年硕士论文

【摘要】：传统的防护材料具有质量重,体积大,不灵活,只能防护胸腹等人体主要部位的缺点,越来越不符合当代战争的需求。因此急需一种新型的,具有质轻柔软以及良好的防护性能的柔性防护材料。针对这种需求,本课题分别制备了剪切增稠液(STF)—碳纤维复合材料。其中,分别对分散相粒子纳米SiO2进行了粒径、透射电镜、红外以及XRD测试,分析其粒径的大小、形状、粒径分布、官能团以及物相等情况；采用机械搅拌法和超声分散法制备STF,通过AR2000ex型流变仪测试STF的流变性能,并分析其影响因素；采用静态浸渍法制备STF-碳纤维复合材料,分别对其进行防护性能测试,通过扫描电镜观察测试前后纤维织物的微观形貌。测试结果表明：(1)纳米SiO为非晶态,粒径约为50nm,表面含有大量的羟基,单分散性很差,团聚现象严重；(2)制备的STF具有良好的流变性能,且SiO2质量分数、分散介质以及温度对流变性能均有影响；(3)STF-碳纤维复合材料的防刺性能要优于纯碳纤维织布,10层复合材料的防护性能与16层纯纤维织物相当,且前者的质量与柔韧性要远好于后者,纤维之间的摩擦力在防刺过程中起着主要作用。
[Abstract]:Traditional protective materials have the disadvantages of heavy weight, large volume, inflexibility, and can only protect the main parts of human body, such as chest and abdomen, which are more and more incompatible with the needs of contemporary war. Therefore, a new flexible protective material with light weight and good protection performance is urgently needed. In order to meet this demand, the shear thickening liquid STF-carbon fiber composites were prepared. The particle size, shape, particle size distribution, functional groups and the equality of the particles were measured by TEM, IR and XRD. STF was prepared by mechanical stirring and ultrasonic dispersion. The rheological properties of STF were tested by AR2000ex rheometer, and the influencing factors were analyzed. The microstructure of fiber fabric before and after testing was observed by scanning electron microscope (SEM). The results show that the nano-SiO is amorphous, the particle size is about 50 nm, the surface contains a large number of hydroxyl groups, the monodispersity is very poor, the agglomeration phenomenon is serious, the STF has good rheological properties and Sio 2 mass fraction. The effect of dispersing medium and temperature on rheological property is better than that of pure carbon fiber woven 10 layer composite and 16 layers of pure fiber fabric. The quality and flexibility of the former are much better than that of the latter, and the friction between fibers plays a major role in the process of anti-prickle.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB332

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