Ⅳ型高压储氢气瓶用碳纤维复合材料界面表征与分析  

Characterization and Analysis of Interface of Carbon Composite Material for Type Ⅳ High-Pressure Hydrogen Storage Vessel

作　　者：戚亮亮 程乐乐 余木火[1,2,3] 孙泽玉[1,2,3] QI Liang-liang;CHENG Le-le;YU Mu-huo;SUN Ze-yu(State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Donghua University,Shanghai 201620,China;Center for Civil Aviation Composites,Donghua University,Shanghai 201620,China;Shanghai Key Laboratory of Lightweight Structural Composites,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学、材料科学与工程学院纤维材料改性国家重点实验室,上海201620 [2]东华大学、民用航空复合材料协同创新中心,上海201620 [3]东华大学、上海市轻质结构复合材料重点实验室,上海201620

出　　处：《合成纤维》2023年第4期28-32,共5页Synthetic Fiber in China

基　　金：纤维材料改性国家重点实验室开放课题(KF2203),氢能专项。

摘　　要：Ⅳ型高压储氢气瓶的结构载荷主要由外层碳纤维复合材料(CFRP)承载。良好的碳纤维(CF)与环氧树脂(EP)界面性能有助于载荷传递,使CF强度发挥至最大化,提高压力容器的安全性能,另外可以减少CFRP用量,降低成本,从而打破高昂价格带来的应用局限。通过扫描电镜、原子力显微镜、X射线电子能谱仪、动态接触角、微脱黏测试仪及万能试验机对CFRP界面进行了系统的表征与分析。通过分析CF的表面形态、化学成分、润湿性、表面能及界面结合力,揭示了CFRP力学性能与界面性能的相关性。研究表明,CF表面利于形成机械互锁的表面粗糙度、利于化学键结合的含氧活性官能团、利于润湿的极性组分表面能等因素可以增强其与EP的界面结合,最大程度发挥CF的力学性能,使高压容器承载复合材料具有稳定的力学性能。The structural load of type IV high-pressure hydrogen storage vessels is mainly carried by the out⁃er carbon fiber reinforced plastic(CFRP).Better interfacial properties between carbon fiber(CF)and epoxy resin(EP)can help load transfer,maximize the strength of CF,and improve the safety performance of pressure vessels.In addition,the amount of CFRP can be reduced to reduce costs,thereby breaking the application limitations brought about by high prices.The interface of CFRP was systematically characterized and ana⁃lyzed by scanning electron microscope,atomic force microscope,X-ray electron spectrometer,dynamic con⁃tact angle,micro-debonding tester and universal testing machine.The correlation between CFRP mechanical properties and interfacial properties was revealed by analyzing the surface morphology,chemical composi⁃tion,wettability,surface energy and interfacial binding force of CF.Researches show that factors such as the surface roughness of the CF surface that are conducive to the formation of mechanical interlocking,the oxy⁃gen-containing active functional groups that are conducive to chemical bonding,and the surface energy of po⁃lar components that are conducive to wetting can enhance its interfacial bonding with EP,maximize the me⁃chanical properties of CF,and make the composite material for high-pressure vessels have stable mechanical properties.

关 键 词：Ⅳ型高压储氢气瓶 CF CFRP 界面剪切强度 NOL环 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ342.742[化学工程—化纤工业]