Enhancing Structural Performance of Composite Materials with Nanofibres
Nanofibres exist in nature as basic building blocks in both animals and plants.They haverecently emerged as important fibrous materials for reinforcing and modifying polymers and polymer matrix composites.Both neat polymer nanofibres and polymer/carbon nanofibre (CNF) hybrids were produced by an electrospinning technique,and used for toughening and reinforcing thermoset epoxy resins and their carbon fibre reinforced composite laminates.Significantly enhanced interlaminar fracture toughness has been achieved with minimal weight loading of polymer nanofibres (e.g.polyetherketonecardo,PEK-C) in composite laminates.Finer nanofibres resulted in more stable crack propagation and superior performance under flexural loading.Composites modified by fine nanofibres maintained the glass transition temperature (Tg) of the cured resin.Increasing nanofibre interlayer thickness improved the fracture toughness but compromised the flexural performance.The Tg of the cured resin deteriorated after the thickness increased to a certain extent.The addition of PEK-C/CNF nanofibres to the epoxy resin led to the distribution of CNFs primarily within the phase separated PEK-C-rich domains.Synergistic effects of thermoplastic PEK-C and CNFs on the mechanical properties,phase morphologies and thermal stability of the resultant epoxy matrix composites were observed when the PEK-C/CNF nanofibres were blended at a low content into the epoxyresin.Strong and tough multifunctional nanocomposites were prepared with the addition of 5 wt.% PEK-C/CNF nanofibres to the epoxy matrix.The toughening mechanism was investigated with respect to the critical role of phase morphology in carbon/epoxy composites.The solubility in epoxy and melting characteristics of thermoplastics were examined for their effects on phase structure and delamination resistance.Polymer-induced phase separation played a critical role in affecting the effectiveness of thermoplastic nanofibre interlayer toughening.
Jin Zhang Tong Lin Xungai Wang
Australian Future Fibres Research & Innovation Centre, Institute for Frontier Materials, Deakin Univ Australian Future Fibres Research & Innovation Centre, Institute for Frontier Materials, Deakin Univ
国际会议
SAMPE中国2012年大型学术会议(SAMPECHINA2012)
北京
英文
1-1
2012-10-15（万方平台首次上网日期，不代表论文的发表时间）