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Chemical vapor deposition graphene transfer onto asymmetric PMMA support
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2021-09-07 , DOI: 10.1002/app.51590 Vinícius Henrique Vivas 1 , Marcelo Costa Flores 1 , Wander Pereira Jesus 2 , André Santarosa Ferlauto 3 , Thiago Henrique Rodrigues Cunha 2 , Katia Cecília Figueiredo 1
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2021-09-07 , DOI: 10.1002/app.51590 Vinícius Henrique Vivas 1 , Marcelo Costa Flores 1 , Wander Pereira Jesus 2 , André Santarosa Ferlauto 3 , Thiago Henrique Rodrigues Cunha 2 , Katia Cecília Figueiredo 1
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Graphene is a promising material for membrane applications. However, the graphene production with large specific area and good structural quality is a challenge. Therefore, the production and characterization of composite membranes with graphene grown by chemical vapor deposition (CVD) over a porous polymethylmethacrylate (PMMA) substrate was investigated. The experimental strategy consisted in applying CVD-graphene on a PMMA surface using PMMA-assisted graphene wet transfer. The proposed methodology resulted in large-area membranes with 2 cm diameter. The samples were characterized by Raman spectroscopy, indicating the presence of graphene in good quality and relative structural integrity. The analysis by scanning electron microscopy revealed the formation of a microporous support with an asymmetric structure. The gas permeation measurements of graphene/PMMA membranes showed a permeability reduction of 81.9% for CO2 and 83.7% for N2. The contribution of PMMA to flow resistance was 2% and 11% for CO2 and N2, respectively, and the contribution of graphene was 98% and 89% for CO2 and N2. Therefore, this research presents a potential advance in transferring graphene to porous support, and the impermeability process of membranes composed of graphene/PMMA, a fundamental step for the development of graphene membranes before the production of controlled-sized pores.
中文翻译：
化学气相沉积石墨烯转移到不对称 PMMA 载体上
石墨烯是一种很有前途的膜应用材料。然而，具有大比表面积和良好结构质量的石墨烯生产是一个挑战。因此，研究了在多孔聚甲基丙烯酸甲酯 (PMMA) 基材上通过化学气相沉积 (CVD) 生长的石墨烯复合膜的生产和表征。实验策略包括使用 PMMA 辅助石墨烯湿转移在 PMMA 表面上应用 CVD 石墨烯。所提出的方法产生了直径为 2 厘米的大面积膜。样品通过拉曼光谱进行表征，表明石墨烯的质量和相对结构完整性良好。扫描电子显微镜分析揭示了具有不对称结构的微孔载体的形成。2和 N 2 的83.7% 。PMMA的流动阻力的贡献率为2％和CO为11％2和N 2分别和石墨烯的贡献率为98％，CO为89％2和N 2。因此，这项研究展示了将石墨烯转移到多孔载体上的潜在进展，以及由石墨烯/PMMA 组成的膜的不渗透过程，这是在生产可控尺寸的孔之前开发石墨烯膜的基本步骤。
更新日期：2021-10-19
中文翻译：
化学气相沉积石墨烯转移到不对称 PMMA 载体上
石墨烯是一种很有前途的膜应用材料。然而，具有大比表面积和良好结构质量的石墨烯生产是一个挑战。因此，研究了在多孔聚甲基丙烯酸甲酯 (PMMA) 基材上通过化学气相沉积 (CVD) 生长的石墨烯复合膜的生产和表征。实验策略包括使用 PMMA 辅助石墨烯湿转移在 PMMA 表面上应用 CVD 石墨烯。所提出的方法产生了直径为 2 厘米的大面积膜。样品通过拉曼光谱进行表征，表明石墨烯的质量和相对结构完整性良好。扫描电子显微镜分析揭示了具有不对称结构的微孔载体的形成。2和 N 2 的83.7% 。PMMA的流动阻力的贡献率为2％和CO为11％2和N 2分别和石墨烯的贡献率为98％，CO为89％2和N 2。因此，这项研究展示了将石墨烯转移到多孔载体上的潜在进展，以及由石墨烯/PMMA 组成的膜的不渗透过程，这是在生产可控尺寸的孔之前开发石墨烯膜的基本步骤。
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