Investigating the use of chitosan as a coupling agent to improve the interfacial properties of phosphate glass fibre/polycaprolactone composites

Chao Tan, Ifty Ahmed, Andrew J. Parsons, Chenkai Zhu, Junxiao Zhang, Chris D. Rudd, Xiaoling Liu

Research output: Contribution to conferencePaperpeer-review

Abstract

Chitosan (CS) was investigated to improve the interfacial properties of the phosphate glass fibre/polycaprolactone (PGF/PCL) composites. Dilute acetic acid was used as the solvent for CS and its influence on mechanical properties of the fibres was analysed via single fibre tensile testing. The interfacial shear stress (IFSS) was analysed using a fragmentation test and the interaction between the sizing agent and the glass surface was analysed by XPS. TGA and SEM were also used to indicate the sizing performance. A dip-coating process in the CS-acetic acid solution was observed to increase the IFSS by 56% with insignificant (p > 0.05) fibre strength loss compared to the pure PGF control. The enhancement of IFSS after sizing was suggested to be attributed to the interaction between the protonated amine groups of the CS and the phosphate structure of the PGF. Then the sized fibres were rinsed in the acetic acid solution (2% v/v) to remove the extra agent on the fibre surface and the IFSS consequently increased by 78% of the control, but with a significant (p < 0.001) strength loss of 20%. This increase in IFSS was suggested to be due to the improvement of the interphase and load transmission between the matrix and fibres.

Original languageEnglish
Publication statusPublished - 2017
Event21st International Conference on Composite Materials, ICCM 2017 - Xi'an, China
Duration: 20 Aug 201725 Aug 2017

Conference

Conference21st International Conference on Composite Materials, ICCM 2017
Country/TerritoryChina
CityXi'an
Period20/08/1725/08/17

Keywords

  • Chitosan
  • Coupling agents
  • Interfacial properties
  • Phosphate glass fibres
  • Polycaprolactone composites

ASJC Scopus subject areas

  • Engineering (all)
  • Ceramics and Composites

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