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
|Author:||Geng, S.1; Yao, K.2; Harila, M.1;|
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
|Online Access:||PDF Full Text (PDF, 0.6 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2018101938494
Chinese Society for Composite Materials,
|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.
21st International Conference on Composite Materials : ICCM21 Proceedings. 20-25 August 2017, Xi'an, China
21st International Conference on Composite Materials
|Type of Publication:||
D3 Professional conference proceedings
|Field of Science:||
216 Materials engineering
The authors thank for the financial support from Wallenberg Wood Science Center, SNS WOOD-PRO and Kempe Foundation.
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