摘要随着近年来各类恐怖事件的不断发生， 安全成为维持国家稳定的首要问题。在我国虽然枪支管理严格，很少出现枪击事件，但匕首等刀类凶器对公民安全有很大的威胁，使得防刀防刺类材料成为人们的迫切需求。旧的防刺材料由于笨重、不灵活已渐渐被人们放弃使用，而如何研发出穿着舒适、防护面积大的柔性防护服成为当前热点。67808

本课题使用改进后的Stöber法制备SiO2粉末，采用扫描电镜（SEM）、X射线衍射仪（XRD）和红外光谱仪分析其粒径大小和物像；对制得的SiO2进行了接枝改性实验，研究改性对其分散性的影响；采用超声结合机械搅拌法制备剪切增稠流体（STF），采用静止浸渍法将STF和UHMWPE纤维织物复合制备复合防护材料，并对不同质量分数、不同分散剂、不同浸渍压力下制备的复合防护材料进行了防刀防锥测试。

试验结果表明，纳米SiO2粒子在接枝了PEG200之后分散性得到提高；不同分散相的质量分数会影响复合织物的防护性能；用PEG-SiO2制成STF复合的UHMWPE织物较纯织物和由SiO2制成STF复合织物防刺性能显著提高；随着浸渍压力提高，复合织物的增重量会减小，而防护性能提高。

毕业论文关键词 剪切增稠流体  二氧化硅接枝改性  不同压力下浸渍STF复合织物  防刺性能

毕业设计说明书（论文）外文摘要

Title    Shear thickening fluid performance fabric flexible composite protective material preparation, optimization, protection performance study

Abstract

As the continuous occurence of terrorist incidents in recent years, security has become the primary problem in maintaining national stablity. Due to strict gun control, shooting incident rarely happens in China, but knife still remains to be a great threat to the security of Chinese citizens. As a result, developing anti-stab materials has become an urgent need. Old-fashioned anti-stab materials have been gradually abandoned, because they are heavy and inflexible. Meanwhile, the development of new protective suit which is comfortable to wear and provide bigger protection area has become a hotspot in material science. 

The silica particle was prepared by improved Stober method in this project .The particle size and the phase were tested by SEM,and the XRD and FT-IR.UHMWPE fabric and STF which was diluted by ethanol are composited though static immersion method. Basing on existing research, this project places focus on grafting modification of dispersant SiO2, as well as anti-stab tests of composite protective materials which are made under different mass fractions, dispersants and impregnation pressures.

According to the results, after PEG200 grafting, the dispersibility of SiO2 has been improved; compared with plain fabric and STF composite fabric, the anti-stab performance of STF-UHMWPE composite fabric made of PEG-SiO2 has been significantly improved; impregnation pressure will influence the anti-stab performance of composite fabric. 

Keywords  STF 、Graft-modified silica、STF stab performance composite fabric

目   次

1  引言 1

1.1  本课题研究目的及意义 1

1.2  剪切增稠流体（STF）简介 1

1.3  影响剪切增稠流体的流变性能的因素 3

1.4  防刺材料国内外研究现状 5

1.5  纳米粒子表面改性 7

2  实验部分 9

2.1  实验原料及设备