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High porosity cellulose nanopapers as reinforcement in multi-layer epoxy laminates

Mautner, Andreas and Wan Nawawi, Wan Mohd Fazli and Koon-Yang, Lee and Bismarck, Alexander (2020) High porosity cellulose nanopapers as reinforcement in multi-layer epoxy laminates. Composites Part A: Applied Science and Manufacturing, 131. pp. 1-9. ISSN 1359-835X E-ISSN 1878-5840

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Utilizing high-performance cellulose nanopapers as 2D-reinforcement for polymers allows for realizing high-loading-fraction (80 vol-%), high-performance (strength > 150 MPa, modulus > 10 GPa) laminated nanopaper reinforced epoxy composites. Such cellulose nanopapers are inherently dense, which renders them difficult to be impregnated with the epoxy-resin. High-porosity nanopapers facilitate better resin impregnation, truly utilizing the properties of single cellulose nanofibres instead of the nanofibre network. We report the use of high-porosity (74%) but low strength and modulus bacterial cellulose (BC) nanopapers, prepared from BC-in-ethanol dispersion, as reinforcement for epoxy-resin. High-porosity nanopapers allowed for full impregnation of the BC-nanopapers with epoxy-resin. The resulting BC-reinforced epoxy-laminates possessed high tensile modulus (9 GPa) and strength (100 MPa) at a BC loading of 30 vol-%, resulting from very low void-fraction (3 vol-%) of these papregs compared to conventional nanopaper-laminates (10+ vol.-%). Better resin impregnation of less dense nanocellulose networks allowed for maximum utilization of stiffness/strength of cellulose nanofibrils. © 2020 Elsevier Ltd

Item Type: Article (Journal)
Additional Information: 7777/82235
Uncontrolled Keywords: Cellulose A, Laminates A, Prepreg A, Thermosetting resin A
Subjects: T Technology > TP Chemical technology
T Technology > TP Chemical technology > TP248.13 Biotechnology
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering
Kulliyyah of Engineering > Department of Biotechnology Engineering
Depositing User: Wan Mohd Fazli Wan Nawawi
Date Deposited: 17 Aug 2020 16:12
Last Modified: 17 Aug 2020 16:12
URI: http://irep.iium.edu.my/id/eprint/82235

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