Imperial College London
Alternate

Professor Koon-Yang Lee

Faculty of Engineering, Department of Aeronautics

Professor in Polymer Engineering
 
 
 
//

Contact

 

+44 (0)20 7594 5150koonyang.lee

 
 
//

Location

 

325City and Guilds BuildingSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Herrera:2022:10.1016/j.compositesa.2022.106845,
author = {Herrera, N and Li, J and Lee, K-Y},
doi = {10.1016/j.compositesa.2022.106845},
journal = {Composites Part A: Applied Science and Manufacturing},
pages = {1--8},
title = {Tough poly(ethylene glycol)-sized bacterial cellulose sheet for high impact strength laminated acrylic composites},
url = {http://dx.doi.org/10.1016/j.compositesa.2022.106845},
volume = {156},
year = {2022}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Dried and well-consolidated sheet of bacterial cellulose (BC) nanofibrils is a material structure that possesses high modulus and strength but is also brittle, which limits its potential in various advanced composite applications. Here, we report a simple method of enhancing the toughness of BC sheet by sizing the BC nanofibrils with poly(ethylene glycol) (PEG). This hinders interfibril hornification and facilitates large-scale BC nanofibril debonding, slippage and reorientation upon deformation. The PEG-sized BC sheets show high tensile strain-at-failure and work of fracture compared to neat BC sheet. PEG-sized BC reinforced laminated acrylic composites achieve a flatwise Charpy impact strength of up to 26 kJ m−2. This is a remarkable increase over the impact strength of neat impact-modified acrylic of only 12 kJ m−2, especially when the BC loading required to achieve this radical improvement is only 0.2 wt-%. Our study opens new paradigm in using low BC loading to achieve performance improvements suitable for high value composite applications.
AU  - Herrera,N
AU  - Li,J
AU  - Lee,K-Y
DO  - 10.1016/j.compositesa.2022.106845
EP  - 8
PY  - 2022///
SN  - 1359-835X
SP  - 1
TI  - Tough poly(ethylene glycol)-sized bacterial cellulose sheet for high impact strength laminated acrylic composites
T2  - Composites Part A: Applied Science and Manufacturing
UR  - http://dx.doi.org/10.1016/j.compositesa.2022.106845
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000793350000002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://www.sciencedirect.com/science/article/pii/S1359835X22000392?via%3Dihub
UR  - http://hdl.handle.net/10044/1/100836
VL  - 156
ER  -
Download