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A novel and facile prepared wound dressing based on large expanded graphite worms

  • Zhongqun Liu (a1), Yishan Hao (a2), Yijun Su (a1), Yaojie Wei (a1), Jingyun Wang (a1), Hao Yan (a1), Wanci Shen (a3), Zhenghong Huang (a3), Xiumei Wang (a1), Lingyun Zhao (a1) and Xiaodan Sun (a1)...

Abstract

As rarely large flake graphite (9 mesh) was recently exploited in China, it was innovatively developed as the raw material to prepare a novel wound dressing based on large expanded graphite (EG) in this work. The EG worms were prepared in an easy oxidative intercalation and thermal expansion method. Afterward, chitosan was grafted onto the surface of EG by chemical modification, forming CS-EG worms. CS-EG sponge dressings were then obtained by pressing a number of CS-EG worms together by external force. Due to the porous structure and large specific surface area, the produced CS-EG sponges exhibited outstanding adsorption capacity for wound exudate. They could also promote blood coagulation by adsorbing the blood cells and proteins quickly and effectively, showing excellent hemostatic performance. The eminent performances and the simple preparation process ensure the great application potential of CS-EG as a dressing material. This is also the first time to report the application of the traditional carbon material, EG, to act as a dressing material after chemical modification.

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Corresponding author

a)Address all correspondence to these authors. e-mail: sunxiaodan@mail.tsinghua.edu.cn

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