High strength graphene oxide/chitosan composite screws with a steel-concrete structure

Xiaoqiang Jin; Guoqi Li; Huihong Jiang; Yi Zhou; Wenkan Zhang; Xiaojiong Bao; Zhengke Wang; Qiaoling Hu

doi:10.1016/j.carbpol.2019.03.039

High strength graphene oxide/chitosan composite screws with a steel-concrete structure

Carbohydr Polym. 2019 Jun 15:214:167-173. doi: 10.1016/j.carbpol.2019.03.039. Epub 2019 Mar 14.

Authors

Xiaoqiang Jin¹, Guoqi Li², Huihong Jiang³, Yi Zhou¹, Wenkan Zhang⁴, Xiaojiong Bao¹, Zhengke Wang⁵, Qiaoling Hu¹

Affiliations

¹ MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Institute of Biomedical Macromolecules, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China.
² Department of Orthopedics Research Institute, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, Zhejiang, China.
³ MOE Key Laboratory of Macromolecule Synthesis and Functionalization, State Key Laboratory of Silicon Materials, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China.
⁴ Department of Orthopedic Surgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, Zhejiang, China.
⁵ MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Institute of Biomedical Macromolecules, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China. Electronic address: wangzk@zju.edu.cn.

PMID: 30925986
DOI: 10.1016/j.carbpol.2019.03.039

Abstract

Due to the biocompatibility, biodegradability and numerous resources of chitosan (CS), CS screws attract much more attention, as a new generation of internal fixation devices. Herein, a facile solution-casting method was utilized to fabricate CS composite screws with a steel-concrete structure by combining graphene oxide (GO) and CS fiber bundles. The embedding GO endowed CS screws with a Honeycomb-Cobweb network. And CS screws reinforced with CS fiber bundles of four arrangement sequences could endure different degrees of external force. The optimal arrangement type of CS fiber bundles (the linear type) and addition amount of GO (0.15 wt%) was utilized to construct the steel-concrete structure. Due to the mechanical interlocking between the GO/CS matrices and CS fiber bundles, the bending strength of CS composite screws, with such an unusual structure, could reach high up to 378 MPa, approximately 1.88 times the blank control group was. The findings stand out as a new tool to prepare high bending strength screws and the steel-concrete structure might be used effectively in more critical load-bearing situations.

Keywords: Chitosan; Fiber; Graphene oxide; Steel-concrete structure.