Imperial College London
Portrait Picture

Dr David B Anthony

Faculty of Natural Sciences, Department of Chemistry

Advanced Technical Project Coordinator
 
 
 
//

Contact

 

+44 (0)20 7594 5857d.anthony08 Website

 
 
//

Location

 

401 (opposite 401L)Molecular Sciences Research HubWhite City Campus

//

Summary

 

Publications

Citation

BibTex format

@article{De:2020:10.1016/j.compscitech.2020.108275,
author = {De, Luca H and Anthony, D and Greenhalgh, E and Bismarck, A and Shaffer, M},
doi = {10.1016/j.compscitech.2020.108275},
journal = {Composites Science and Technology},
pages = {1--12},
title = {Piezoresistive structural composites reinforced by carbon nanotube-grafted quartz fibres},
url = {http://dx.doi.org/10.1016/j.compscitech.2020.108275},
volume = {198},
year = {2020}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Nano-engineered fibre/matrix interfaces can improve state-of-the-art fibre-reinforced composites. Grafting carbon nanotubes (CNTs) to high temperature quartz glass fibres produces “hairy” or “fuzzy” fibres, which combine reinforcements at micrometre and nanometre length scales. Fuzzy quartz fibres were produced continuously, reel-to-reel, on whole tows, in an open chemical vapour deposition reactor. The resulting uniform coverage of 200 nm long CNTs increased the interfacial shear strength with epoxy (90.3 ± 2.1 MPa) by 12% compared to the commercially-sized counterpart, as measured by single fibre pull-out tests. The improved interfacial properties were confirmed at the macroscale using unidirectional hierarchical bundle composites, which exhibited a delayed onset of fibre/matrix debonding. Although the quartz fibres are electrically insulating, the grafted CNT create a conductive path, predominantly parallel to the fibres. To explore the applicability for structural health monitoring, the resistivity was recorded in situ during mechanical testing, and correlated with simultaneous acoustic emission data. The baseline resistivity parallel to the fibres (ρ0 = 3.9 ± 0.4 × 10−1 Ω m) displayed a linear piezoresistive response (K = 3.64) until failure at ca. 2.1% strain, also referred to as "gauge factor”, a two-fold improvement over traditional resistance strain gauges (e.g. constantan). Hierarchical, fuzzy quartz fibres, therefore, simultaneously enhance both structural and sensing performance, offering multifunctional opportunities in large composite parts.
AU  - De,Luca H
AU  - Anthony,D
AU  - Greenhalgh,E
AU  - Bismarck,A
AU  - Shaffer,M
DO  - 10.1016/j.compscitech.2020.108275
EP  - 12
PY  - 2020///
SN  - 0266-3538
SP  - 1
TI  - Piezoresistive structural composites reinforced by carbon nanotube-grafted quartz fibres
T2  - Composites Science and Technology
UR  - http://dx.doi.org/10.1016/j.compscitech.2020.108275
UR  - https://www.sciencedirect.com/science/article/pii/S0266353820304620?via%3Dihub
UR  - http://hdl.handle.net/10044/1/80762
VL  - 198
ER  -
Download