Liu Wanyu, Li Yue, Yi Shunmin, Wang Limin, Wang Haigang, Zhang Jingfa
Key Laboratory of Bio-Based Material Science and Technology (Ministry of Education), Northeast Forestry University, Harbin 150040, China.
Taiyuan Science Institute of Soil and Water Conservation, Taiyuan 030000, China.
Polymers (Basel). 2021 Jan 12;13(2):236. doi: 10.3390/polym13020236.
To expand the use of wood plastic composites in the structural and engineering constructions applications, continuous aramid fiber (CAF) with nondestructive modification was incorporated as reinforcement material into wood-flour and high-density-polyethylene composites (WPC) by extrusion method with a special die. CAF was treated with dopamine (DPA), vinyl triethoxysilane (VTES), and DPA/VTES, respectively. The effects of these modifications on compatibility between CAF and WPCs and the properties of the resulting composites were explored. The results showed that compared with the original CAF, the adhesion strength of DPA and VTES combined modified CAF and WPCs increased by 143%. Meanwhile, compared with pure WPCs, CAF after modification increased the tensile strength, tensile modulus, and impact strength of the resulting composites by 198, 92, and 283%, respectively.
为了扩大木塑复合材料在结构和工程建筑应用中的使用，通过采用特殊模具的挤出方法，将经过无损改性的连续芳纶纤维（CAF）作为增强材料加入到木粉和高密度聚乙烯复合材料（WPC）中。分别用多巴胺（DPA）、乙烯基三乙氧基硅烷（VTES）以及DPA/VTES对CAF进行处理。探讨了这些改性对CAF与木塑复合材料之间相容性以及所得复合材料性能的影响。结果表明，与原始CAF相比，DPA和VTES复合改性的CAF与木塑复合材料的粘合强度提高了143%。同时，与纯木塑复合材料相比，改性后的CAF使所得复合材料的拉伸强度、拉伸模量和冲击强度分别提高了198%、92%和283%。
