Low viscosity processing using hybrid CNT-coated silica particles to form electrically conductive epoxy resin composites

POLYMER

卷:98

Article

Wilkinson, Arthur N.¹  Kinloch, Ian A.¹  Othman, Raja N.^1,2 

[1] Univ Manchester, Sch Mat, North West Composites Ctr, Manchester M13 9PL, Lancs, England

[2] Natl Def Univ Malaysia, Dept Mech Engn, Kuala Lumpur 57000, Malaysia

关键词: Carbon nanotubes;    Hybrid particles;    Epoxy resin;   

DOI  :  10.1016/j.polymer.2016.06.009

来源: Elsevier

【 摘 要 】

Hybrid particles of multiwall carbon nanotubes (CNTs) grafted onto silica gel were shown to provide a low viscosity processing route to forming electrically-conductive epoxy resin composites. Rheological studies showed the viscoelastic shear moduli of epoxy resin suspensions containing these particles (named SG6_3) remained within the same order of magnitude as that of the neat resin at <= 5 wt% loading (containing up to 1.65 wt% of grafted CNTs). Whereas, the addition of 1.65 wt% of discrete (non-grafted) CNTs into the same resin increased shear moduli by up to seven orders of magnitude. The complex viscosities of suspensions containing <= 5 wt% of SG6_3 remained essentially unchanged, whereas an increase of up to five orders of magnitude resulted upon the addition of 1.65 wt% of nonegrafted CNTs. Whilst rheological studies showed SG6_3 did not form a percolated network at levels <= 5 wt%, addition of only 2 wt% (containing 0.66 wt% CNT) was found to form an electrically-conductive percolated network in an epoxy resin composite with conductivity similar to 10(-4) S/m. (C) 2016 Elsevier Ltd. All rights reserved.

【 授权许可】

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