Poly(methyl methacrylate)-Assisted Exfoliation of Graphite and Its Use in Acrylonitrile-Butadiene-Styrene Composites.,Chemistry - A European Journal

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Poly(methyl methacrylate)-Assisted Exfoliation of Graphite and Its Use in Acrylonitrile-Butadiene-Styrene Composites.
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2020-04-17 , DOI: 10.1002/chem.202000547
Silvia Gentiluomo _{1,

2} , Sanjay B Thorat ₃ , Antonio Esau Del Río Castillo ₁ , Peter S Toth _{1,

4} , Jaya Kumar Panda ₁ , Vittorio Pellegrini _{1,

3} , Francesco Bonaccorso _{1,

3}

Affiliation

One of the applications of graphene in which its scalable production is of utmost importance is the development of polymer composites. Among the techniques used to produce graphene flakes, the liquid-phase exfoliation (LPE) of graphite stands out due to its versatility and scalability. However, solvents suitable for the LPE process are generally toxic and have a high boiling point, making the processing challenging. The use of low boiling point solvents could be convenient for the processing, due to the easiness of their removal. In this study, the use of poly(methyl methacrylate) (PMMA) as a stabilizing agent is proposed for the production of graphene flakes in a low boiling point solvent, that is, acetone. The graphene dispersions produced in the mixture acetone-PMMA have higher concentration, +175 %, and contain a higher percentage of few-layer graphene flakes (<5 layers), that is, +60 %, compared to the dispersions prepared in acetone. The as-produced graphene dispersions are used to develop graphene/acrylonitrile-butadiene-styrene composites. The mechanical properties of the pristine polymer are improved, that is, +22 % in the Young's modulus, by adding 0.01 wt. % of graphene flakes. Moreover, a decrease of ≈20 % in the oxygen permeability is obtained by using 0.1 wt. % of graphene flakes filler, compared to the unloaded matrix.

中文翻译：

聚（甲基丙烯酸甲酯）辅助剥离石墨及其在丙烯腈-丁二烯-苯乙烯复合物中的应用。

石墨烯的应用之一是聚合物复合材料的开发，其中可缩放的生产至关重要。在用于生产石墨烯薄片的技术中，石墨的液相剥离（LPE）因其多功能性和可扩展性而脱颖而出。然而，适合于LPE工艺的溶剂通常是有毒的并且具有高沸点，这使得该工艺具有挑战性。由于易于除去，使用低沸点溶剂可能便于处理。在这项研究中，建议使用聚甲基丙烯酸甲酯（PMMA）作为稳定剂，以在低沸点溶剂（即丙酮）中生产石墨烯薄片。丙酮-PMMA混合物中产生的石墨烯分散体的浓度较高，为+175％，与在丙酮中制备的分散体相比，其含有更高百分比的几层石墨烯薄片（<5层），即+ 60％。所生产的石墨烯分散体用于开发石墨烯/丙烯腈-丁二烯-苯乙烯复合材料。通过添加0.01wt。％，原始聚合物的机械性能得到改善，即，杨氏模量为+ 22％。石墨烯薄片的百分比。而且，通过使用0.1wt。％的氧气渗透率降低了≈20％。与未加载的基质相比，石墨烯片状填料的％。s模量，通过添加0.01 wt。石墨烯薄片的百分比。而且，通过使用0.1wt。％的氧气渗透率降低了≈20％。与未加载的基质相比，石墨烯片状填料的％。s模量，通过添加0.01 wt。石墨烯薄片的百分比。而且，通过使用0.1wt。％的氧气渗透率降低了≈20％。与未加载的基质相比，石墨烯片状填料的％。

更新日期：2020-03-26

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