摘要
为改进芳纶Ⅲ增强树脂复合材料的层间剪切性能,采用1,6-己二异氰酸酯(HDI)对芳纶Ⅲ进行表面接枝改性处理;通过正交实验方法讨论了不同处理条件对芳纶Ⅲ复合材料层间剪切强度的影响;并对改性前后纤维的表面结构形貌及浸润性能进行表征。结果表明:最佳的接枝改性条件为HDI与催化剂质量比100∶1,反应时间24 h,反应温度20℃;芳纶Ⅲ经表面接枝处理后,纤维表面出现凸棱与凹槽,且接枝了活泼的—NH2基团,纤维与环氧树脂的接触角由处理前的73.6°减小至45.2°,芳纶Ⅲ对树脂的浸润性提高,从而提高其复合材料的层间剪切强度。
Aramid fiber Ⅲ was subjected to the surface graft modification with 1,6-hexamethylene diisocyanate （HDI） in order to improve the interlaminar shear strength of aramid fiber Ⅲ-reinforced resin composite. The effects of treatment conditions on the interlaminar shear strength of aramid fiber Ⅲ composite were discussed by orthogonal experiments. The surface morphology and wettability of the fiber were characterized before and after modification. The results showed that the graft modification conditions were optimized as： the mass ratio of HDI and catalyst 100 ： 1, reaction time 24 h, reaction temperature 20 ℃ ; the protruding ridges and grooves appeared on the fiber surface, active -NH2 groups were grafted on aramid fiber Ⅲ, the contact angle between the fiber and epoxy resin was decreased from 73.6°to 45.2°, the wettability between aramid fiber Ⅲ and resin was increased, hence the interlaminar shear strength of the composite was improved after surface graft modification.
出处
《合成纤维工业》
CAS
2015年第1期38-40,共3页
China Synthetic Fiber Industry
关键词
芳纶Ⅲ
1
6-己二异氰酸酯
表面接枝改性
层间剪切性能
浸润性
aramid fiber Ⅲ
1,6-hexamethylene diisocyanate
surface graft modification
interlaminar shear strength
wettabifity
