Compressibility of nanofibre-grafted alumina fabric and yarns: Aligned carbon nanotube forests

作者: Stepan V. Lomov , Sunny Wicks , Larissa Gorbatikh , Ignaas Verpoest , Brian Wardle

DOI: 10.1016/J.COMPSCITECH.2013.10.017

关键词:

摘要: Abstract Growth of nanowires, particularly aligned carbon nanotubes (CNTs) on fibre surfaces, is an additive approach to micro/nanoscale reinforcement for realising hierarchical (or nanoengineered) reinforced composites (FRCs). While eliminating dispersion issues and allowing morphology control, the growth could pose challenges when adapting traditional composite manufacturing methods. To quantify effect CNT manufacturing, compressibility CNT-grafted alumina fibres (woven fabric yarn) studied experimentally. Radially-aligned CNTs are grown lengths 20 μm, with weight fractions up 10%. understand compression as a key aspect processing, pressure vs. thickness measurements made tows, single plies, stacked plies through consecutive cycles. The results show substantial decreases in fibrous assemblies presence grafting, consistent earlier observations random forests morphologies fibres. needed reach typical-use volume fraction 40% increases from 176 kPa non-grafted 1390 kPa grafted 5 wt.% CNTs, 2794 kPa 10 wt.% CNTs. Compared morphology, forest-grafted textiles less compressible, offering higher resistance resilience same or CNTs: at 0.1 MPa pressure, increased decreased) by factor 1.7…2.5 5…10 wt.% grafting (against 1.3…1.5 amount grafting). aligned-CNT exhibits significant hysteresis that was not observed case forests. Analysis curves reveals pressures achieve typical laminate microfibre packing limit standard processing pressures.

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