Flexible highly conductive films based on expanded graphite /polymer nanocomposites

Frontiers in Nanotechnology

Nanotechnology

Silvia V. G. Nista¹  Yuri H. Isayama¹  Stanislav A. Moshkalev¹  Lucia H. I. Mei²  Andrei V. Alaferdov³ 

[1]Center for Semiconductor Components and Nanotechnology (CCSNano), UNICAMP, Campinas, Brazil

[2]Department of Materials and Bioprocess Engineering (DEMBio), Faculty of Chemical Engineering, UNICAMP, Campinas, Brazil

[3]Eldorado Research Institute, Campinas, Brazil

关键词: nanographite;    expanded graphite;    composite;    hydroxyethylcellulose;    electrical and thermal conductivity;    graphene;   

DOI  :  10.3389/fnano.2023.1135835

 received in 2023-01-01, accepted in 2023-03-27,  发布年份 2023

来源: Frontiers

【 摘 要 】

Highly electrically and thermally conducting films of expanded graphite/polymer nanocomposites were fabricated using an approach based on solution mixing methods. The use of Hydroxyethylcellulose and benzylic alcohol based solutions provides efficient dispersion and better exfoliation of multilayer graphene (nanographite) flakes that are further aligned in extended 2D layers forming continuous conductive pathways during lamination (hot calendering) process. Very high electrical conductivity (190 S/cm) was obtained for fabricated layered films. In contrast, for films produced by a conventional mixing and deposition method with acrylic copolymer and the same nanographitic material, with flakes randomly distributed within the composite, much lower conductivities (2.4 S/cm) were obtained.

【 授权许可】

Unknown   
Copyright © 2023 Nista, Alaferdov, Isayama, Mei and Moshkalev.