Zhao Yonghuan, Meng Yang, Zhu Feichao, Su Juanjuan, Han Jian
College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, China.
The Key Lab of Industrial Textile Material and Manufacturing Technology, Hangzhou 310018, China.
Materials (Basel). 2022 Jul 22;15(15):5095. doi: 10.3390/ma15155095.
The emergence of graphene-based polymer composite fibers provides a new opportunity to study the high-performance and functional chemical fibers. In this work, we have developed an efficient and convenient method with polydopamine (PDA) to functionalize and reduce graphene oxide (GO) simultaneously, and the modified graphene nanosheets can obtain uniform dispersion and strong interfacial bonding in nylon 6 (PA6). Furthermore, the reinforced PA6 composite fibers were prepared through mixing PDA-rGO into the PA6 polymer matrix and then melt spinning. The functional modification was characterized by surface analysis and structural testing including SEM, TEM, FTIR, and Raman. When the addition amount of the modified GO was 0.15 wt%, the tensile strength and Young's modulus of the composite fiber reached 310.4 MPa and 462.3 MPa, respectively. The results showed a meaningful reinforcement with an effect compared to the pure nylon 6 fiber. Moreover, the composite fiber also exhibited an improved crystallinity and thermal stability, as measured by DSC and TGA.
基于石墨烯的聚合物复合纤维的出现为研究高性能和功能性化学纤维提供了新的契机。在本工作中，我们开发了一种高效便捷的方法，利用聚多巴胺（PDA）同时对氧化石墨烯（GO）进行功能化和还原，改性后的石墨烯纳米片在尼龙6（PA6）中能实现均匀分散并形成强界面结合。此外，通过将PDA-rGO混入PA6聚合物基体中然后进行熔融纺丝制备了增强型PA6复合纤维。通过包括SEM、TEM、FTIR和拉曼在内的表面分析和结构测试对功能改性进行了表征。当改性GO的添加量为0.15 wt%时，复合纤维的拉伸强度和杨氏模量分别达到310.4 MPa和462.3 MPa。结果表明与纯尼龙6纤维相比有显著的增强效果。此外，通过DSC和TGA测量，复合纤维还表现出改善的结晶度和热稳定性。
