Simple and low‐cost preparation of functionalised graphene by microwave expansion combined with ball milling grafting

IF 4.8 2区 材料科学 Q2 MATERIALS SCIENCE, COMPOSITES
Xiaoyi Zhang, Shuo Wang, Xuhao Bao, Zhanjun Liu, Qingshi Meng
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Abstract

The preparation of functionalised graphene often involves consuming significant amounts of organic solvents, complicated steps, and expensive equipment. This study presented a simple, low‐cost, and efficient method for preparing well‐dispersed functionalised graphene. This method involved the microwave heating of commercial graphene precursors and ball milling of grafted expanded graphite, resulting in a short and straightforward preparation process without requiring large amounts of organic solvents. This process enabled the preparation of few‐layer graphene with a thickness of only 3.5 ± 0.5 nm. During this process, the majority of the surface oxygen‐containing groups were replaced by polyetheramine (D2000) at a grafting rate of up to 5.14%, which improved the interface adhesion strength between the graphene and the epoxy resin. The fabricated altered graphene notably enhanced the mechanical characteristics of the epoxy resin., that is, the toughening effect reached up to 171% with a graphene content of only 0.3 wt%, while the Young's modulus and tensile strength values increased by 54% and 39%, respectively. This process is cost‐effective, easy to operate, and highly efficient, making it suitable for the large‐scale production of well‐dispersed functionalised graphene.Highlights Pioneers mechanical chemical energy in graphene, a new materials science direction. First ball milling on microwave graphene, merging milling benefits with graphene. Ball milling cuts D2000 grafting time on graphene, boosting efficiency. Reduces organic solvent use, cutting costs and environmental effects. Ball milling lowers costs and impacts, aiding graphene material commercia‐lization.

Abstract Image

通过微波膨胀结合球磨接枝法简单低成本地制备功能化石墨烯
制备功能化石墨烯通常需要消耗大量的有机溶剂、复杂的步骤和昂贵的设备。本研究提出了一种简单、低成本、高效率的方法来制备分散良好的功能化石墨烯。该方法包括微波加热商用石墨烯前体和球磨接枝膨胀石墨,制备过程简短直接,无需大量有机溶剂。该工艺可制备厚度仅为 3.5 ± 0.5 纳米的少层石墨烯。在此过程中,大部分表面含氧基团被聚醚胺(D2000)取代,接枝率高达 5.14%,从而提高了石墨烯与环氧树脂之间的界面粘附强度。制造的改性石墨烯显著提高了环氧树脂的机械特性,即石墨烯含量仅为 0.3 wt%时,增韧效果高达 171%,杨氏模量和拉伸强度值分别提高了 54% 和 39%。该工艺成本低、操作简便、效率高,适用于大规模生产分散良好的功能化石墨烯。 亮点 石墨烯中的机械化学能开创了材料科学的新方向。首次在微波石墨烯上进行球磨,将研磨优势与石墨烯相结合。球磨缩短了石墨烯的 D2000 接枝时间,提高了效率。减少有机溶剂的使用,降低成本和环境影响。球磨降低了成本和影响,有助于石墨烯材料的商业化。
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来源期刊
Polymer Composites
Polymer Composites 工程技术-材料科学:复合
CiteScore
7.50
自引率
32.70%
发文量
673
审稿时长
3.1 months
期刊介绍: Polymer Composites is the engineering and scientific journal serving the fields of reinforced plastics and polymer composites including research, production, processing, and applications. PC brings you the details of developments in this rapidly expanding area of technology long before they are commercial realities.
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