University of Oulu

Geng, S., Yao, K., Harila, M., Zhou, Q. & Oksman, K. (2017). Grafting polyethylene glycol on nanocellulose toward biodegradable polymer nanocomposites. In 21st International Conference on Composite Materials : ICCM21 Proceedings. 20-25 August 2017, Xi’an, China. 3640. Zhenjiang: Chinese Society for Composite Materials.

Grafting polyethylene glycol on nanocellulose toward biodegradable polymer nanocomposites

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Author: Geng, S.1; Yao, K.2; Harila, M.1;
Organizations: 1Division of Materials Science, Department of Engineering Sciences and Mathematics, Luleå University of Technology, SE-971 87, Luleå, Sweden
2Royal Institute of Technology, School of Biotechnology, SE-100 44 Stockholm, Sweden
3Fibre and Particle Engineering, University of Oulu, FI-90014, Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.6 MB)
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Language: English
Published: Chinese Society for Composite Materials, 2017
Publish Date: 2018-10-19


The reinforcing effect of a small amount of nanocellulose materials on biodegradable and polymer-based nanocomposites remains challenging because of the poor dispersion of the nanomaterials and inefficient interaction between the nanocellulose and the polymer matrix. To improve this, we grafted polyethylene glycol (PEG) on nanocellulose and produced composites of 0.1 wt% nanocellulose materials and polylactic acid (PLA) matrix. Here, two types of PEG grafted nanocellulose including TEMPO-oxidized cellulose nanocrystals (TOCNCs) and cellulose nanofibers (TOCNFs), with different lengths and diameters were used as reinforcements, respectively. We investigated the effects of grafting PEG on microstructure, mechanical properties and thermal behaviors of the PLA/nanocellulose composites. It is found that the PEG grafted nanocellulose dispersed better compared to the unmodified nanocellulose in the PLA matrix, and provides higher reinforcing effect that improves the elastic modulus of the nanocomposites compared to the composites with unmodified nanocellulose and ungrafted PEG. However, the glass transition temperature of the nanocomposites was not improved by grafting PEG significantly. We also found that the nanocomposites reinforced by TOCNF exhibited enhanced mechanical and thermal properties compared to those with TOCNCs, which is caused by the higher aspect ratio of the TOCNFs.

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Article number: 3640
Host publication: 21st International Conference on Composite Materials : ICCM21 Proceedings. 20-25 August 2017, Xi'an, China
Conference: International Conferences on Composite Materials
Type of Publication: D3 Professional conference proceedings
Field of Science: 216 Materials engineering
221 Nanotechnology
Funding: The authors thank for the financial support from Wallenberg Wood Science Center, SNS WOOD-PRO and Kempe Foundation.
Copyright information: The copyright for the papers belongs to the organizers, the ICCM21 Organizing committee. The ICCM21 has the right to publish the papers in any form and use them for marketing purpose of the conference. However, the ICCM21 Organizing Committee will not prevent you from publishing your paper, or results and data presented in your paper, elsewhere before or after the ICCM21 Conference provided that you (the authors) make reference (could be an acknowledgement or simply a footnote) to the paper published in the proceedings of the ICCM21, Xi'an, August 20-25th 2017.