聚多巴胺和SiO2界面改性对芳纶/聚氨酯复合材料防弹性能的影响
The Effect of Interfacial Modification of Polydopamine and Silicane on Ballistic Performance of Aramid/Polyurethane Composites
岳航宇 1韩飞龙 1张亚 1王程浩 1宗立率 1王锦艳 1蹇锡高1
作者信息
- 1. 大连理工大学化工学院高分子材料系 大连 116024;辽宁省高性能树脂工程技术研究中心 大连 116012
- 折叠
摘要
界面问题作为研究芳纶纤维增强聚氨酯(AF@PU)复合材料的重要挑战,往往容易被忽视.本研究系统性地采用聚多巴胺(PDA)和经过γ-氨丙基三乙氧基硅烷改性的纳米SiO2(m-SiO2),对AF@PU复合材料进行界面改性处理,并深入探究了其防弹性能及弹道损伤机理.通过界面改性,显著增强了纤维与树脂间的黏结力,使m-SiO2/PDA/AF@PU复合材料的界面剥离强度提升了 244.1％,达到4.68 N/cm,层间剪切强度提高了 30.7％,达到6.09 MPa;同时,拉伸、弯曲和压缩强度分别提升了 5.0％、91.4％和69.5％.值得注意的是,m-SiO2的引入显著增加了界面粗糙度,从而使得m-SiO2/PDA/AF@PU在子弹冲击过程中具有最高的能量吸收能力,将其弹道极限速度从AF@PU原有的449.8 m/s提升到了481.9 m/s.本研究深入探讨了界面改性在提升复合材料性能中的积极作用,为未来设计新一代高性能纤维增强聚合物基防弹复合材料提供了参考与启示.
Abstract
The aramid fiber reinforced polyurethane composites(AF@PU),which exhibit high strength and lightweight characteristics,have attracted widespread concerns for advanced personal protective systems.However,the interface has consistently been the scientific issue that permeates composite research and is frequently overlooked.In this work,polydopamine and γ-aminopropyltriethoxysilane modified SiO2(m-SiO2)were used to optimize the interfacial properties,and the effects on ballistic performance and ballistic damage mechanism of composites were deeply investigated.Attributing to the strong bonding strength between fibers and polymer resins improved by them at the interface,the interfacial peeling strength of m-SiO2/PDA/AF@PU is increased by 244.1％(4.68 N/cm);the interlaminar shear strength is increased by 30.7％(6.09 MPa);the tensile,flexural and compressive strength of is maximally increased by 5.0％,91.4％and 69.5％,respectively.Notably,because the introduction of abundant m-SiO2 enhances the interface roughness,m-SiO2/PDA/AF@PU demonstrates the maximal energy absorption value;the ballistic limit velocity is improved from 449.8 m/s of AF@PU to 481.9 m/s of m-SiO2/PDA/AF@PU.This work highlights the optimization of interfacial properties and provides an efficient guideline for the design of next-generation fiber reinforced polymer resin composites.
关键词
复合材料/界面改性/聚多巴胺/纳米二氧化硅/防弹性能Key words
Composites/Interfacial modification/Polydopamine/Nano silica/Ballistic performance引用本文复制引用
出版年
2024
NETL
NSTL
万方数据