Rao Wenhui, Tao Jie, Yang Feihao, Wu Tao, Yu Chuanbai, Zhao Hai-Bo
Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology (GUT), Guilin, 541004, China.
Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology (GUT), Guilin, 541004, China.
Chemosphere. 2023 Jan;311(Pt 2):137047. doi: 10.1016/j.chemosphere.2022.137047. Epub 2022 Nov 3.
With the high integration of electronic products in our daily life, high-performance epoxy resins (EP) with excellent flame retardancy, smoke suppression, and mechanical strength are highly desired for applications. In this study, copper organophosphate nanosheets were evenly grown on the surface of graphene oxide (GO) via a self-assembly process based on coordination bonding and electrostatic interactions. The resultant nanohybrid endowed EP with satisfactory flame retardant effect and improved mechanical properties. Incorporating functionalized nanosheets of merely 1 wt% loading, the impact strength of the EP nanocomposites improved by 147% when compared to 1% EP-GO. Additionally, the nanosheets inhibited the smoke and heat release of EP, and the limiting oxygen value of EP-EGOPC reached ∼29%. The mechanism analysis verified that the existence of organophosphate and copper-containing components associated with the physical barrier of GO promoted the hybrid aromatization of the char layer, thereby improving the fire safety of epoxy matrix. This research offers a new interfacial method for designing functional nanosheets with good interface compatibility and high flame-retardant efficiency in polymers.
随着电子产品在我们日常生活中的高度集成，具有优异阻燃性、抑烟性和机械强度的高性能环氧树脂（EP）在应用中备受青睐。在本研究中，基于配位键和静电相互作用，通过自组装过程在氧化石墨烯（GO）表面均匀生长有机磷酸铜纳米片。所得纳米杂化物赋予EP令人满意的阻燃效果并改善了机械性能。仅加入1 wt%负载量的功能化纳米片时，与1% EP-GO相比，EP纳米复合材料的冲击强度提高了147%。此外，纳米片抑制了EP的烟雾和热量释放，EP-EGOPC的极限氧指数达到约29%。机理分析证实，有机磷酸盐和含铜成分的存在与GO的物理屏障相关，促进了炭层的杂化芳构化，从而提高了环氧基体的消防安全性能。本研究为在聚合物中设计具有良好界面相容性和高阻燃效率的功能纳米片提供了一种新的界面方法。
