Song Pengfei, Fang Qianli, Liu Wen, Ma Xinyue, Li Qingchao, Naik Mehraj-Ud-Din, Ahmad Mudasir, Huang Guoqing, Yang Chuncai
Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110136, China.
Department of Chemical Engineering, College of Engineering and Computer Science, Jazan University, Jazan 45142, Saudi Arabia.
Polymers (Basel). 2024 Dec 9;16(23):3447. doi: 10.3390/polym16233447.
Interlaminar shear strength (ILSS) and compressive strength are two of the most critical properties of carbon fiber-reinforced polymer (CFRP). In this report, three types of epoxy resins-4,4'-diaminodiphenylmethane epoxy resin (AG-80), bisphenol A epoxy resin (E-1NT), and novolac epoxy (EPN)-were studied. E-1NT is characterized by low viscosity and low cost but exhibits poor mechanical properties, while AG-80 offers better wetting with carbon fiber. These two epoxy resins were mixed in various mass ratios. The study revealed that as the AG-80 content increased, the ILSS of the composite also increased, reaching a maximum of 94.04 MPa when the AG-80 content reached 60%. Beyond this point, further increases in AG-80 did not enhance the ILSS. Conversely, the compressive strength initially increased but then declined sharply as the AG-80 ratio increased. The maximum compressive strength was recorded at 748.52 MPa when the AG-80 content reached 60%, which was 21% higher than pure AG-80 and 32% higher than pure E-1NT. Additionally, the study examined three different types of ionic sizing agents and four different resin matrices (E-1NT/DDS, AG-80/DDS, AG-80/E-1NT/DDS, EPN/DDS). Among them, the 60% AG-80/40% E-1NT/DDS/CF formulation demonstrated the best balance in both ILSS and compressive strength.
层间剪切强度（ILSS）和抗压强度是碳纤维增强聚合物（CFRP）最关键的两个性能。在本报告中，研究了三种类型的环氧树脂——4,4'-二氨基二苯甲烷环氧树脂（AG-80）、双酚A环氧树脂（E-1NT）和酚醛环氧树脂（EPN）。E-1NT的特点是粘度低、成本低，但机械性能较差，而AG-80与碳纤维的润湿性更好。将这两种环氧树脂按不同质量比混合。研究表明，随着AG-80含量的增加，复合材料的ILSS也增加，当AG-80含量达到60%时，ILSS最高达到94.04MPa。超过这一点，AG-80的进一步增加并不会提高ILSS。相反，抗压强度最初增加，但随着AG-80比例的增加随后急剧下降。当AG-80含量达到60%时，最大抗压强度记录为748.52MPa，比纯AG-80高21%，比纯E-1NT高32%。此外，该研究还考察了三种不同类型的离子型浸润剂和四种不同的树脂基体（E-1NT/DDS、AG-80/DDS、AG-80/E-1NT/DDS、EPN/DDS）。其中，60%AG-80/40%E-1NT/DDS/CF配方在ILSS和抗压强度方面表现出最佳的平衡。
