• 文献标题:   High strength graphene oxide/chitosan composite screws with a steel-concrete structure
  • 文献类型:   Article
  • 作  者:   JIN XQ, LI GQ, JIANG HH, ZHOU Y, ZHANG WK, BAO XJ, WANG ZK, HU QL
  • 作者关键词:   chitosan, fiber, graphene oxide, steelconcrete structure
  • 出版物名称:   CARBOHYDRATE POLYMERS
  • ISSN:   0144-8617 EI 1879-1344
  • 通讯作者地址:   Zhejiang Univ
  • 被引频次:   3
  • DOI:   10.1016/j.carbpol.2019.03.039
  • 出版年:   2019

▎ 摘  要

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.