摘要
针对纤维增强酚醛树脂基复合材料,比较研究了四种不同结构预制体结构对这类复合材料性能的影响。对复合材料的密度、热稳定性、老化前后的力学性能以及比表面积及孔隙进行测试和分析,结果表明采用碳纤维网胎预制体制备的树脂基复合材料的F在各项性能测试中均表现优异。试件F重量轻,红外光谱分析揭示,采用碳纤维网胎的F试件在固化程度上超越了其他试件。比表面积及孔隙测试显示,F试件拥有更小且更加均匀分布的孔隙,其在力学性能和热稳定性方面优势明显。在力学性能方面,F试件的表现依旧优异,拉伸强度达到535.8 MPa,并且在200℃下热氧老化72 h后性能仍然稳定。SEM观察到碳纤维表面被树脂紧密黏附,纤维与树脂的界面相容性良好,宏观表现为拉伸强度和层间剪切强度高,可应用于对树脂基复合材料性能需求为轻量化、高强度和耐高温的场合。
This study comparatively investigates the influence of four distinct preform structures on the properties of fiber-reinforced phenolic resin-based composites.Comprehensive assessments were conducted on the composite's density,thermal stability,mechanical properties before and after aging,specific surface area,and porosity.The findings indicate that composites prepared with carbon fiber mesh preforms,designated as Sample F,consistently outperformed others in all tested attributes.Sample F exhibits reduced weight and,as revealed by infrared spectroscopy,surpasses other samples in terms of curing degree.Furthermore,specific surface area and porosity analyses demonstrate that Sample F possesses smaller and more uniformly distributed pores,conferring significant mechanical strength and thermal stability advantages.In terms of mechanical properties,Sample F excels with a tensile strength reaching 535.8 MPa,and even after thermal-oxidative aging at 200°C for 72 hours,its performance remains consistent.Scanning electron microscopy(SEM)observations reveal a tight adhesion between the carbon fibers and the resin,indicating excellent interfacial compatibility;this is macroscopically manifested in high tensile and interlaminar shear strengths.Such composites are particularly suitable for applications demanding lightweight,high-strength,and high-temperature-resistant resin-based materials.
作者
董磊
全皓月
段无畏
吴剑宇
祁建磊
汪艳萍
DONG Lei;QUAN Haoyue;DUAN Wuwei;WU Jianyu;QI Jianlei;WANG Yanping(School of Chemical Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Dynamic Machinery Institute of Inner Mongolia,Hohhot 010000,China;Inner Mongolia Yiji Group Like Rubber and Plastic Products Co.,Ltd.,Inner Mongolia Baotou 014000,China)
出处
《内蒙古工业大学学报（自然科学版）》
2024年第4期316-322,共7页
Journal of Inner Mongolia University of Technology：Natural Science Edition
基金
科工局国防基础科研项目(JCKY2021605B012)。
关键词
酚醛树脂
纤维
老化
力学性能
预制体
phenolic resin
fiber
aging
mechanical properties
preform
