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Grafting polyethylene glycol on nanocellulose toward biodegradable polymer nanocomposites
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Fiber- och polymerteknologi.
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Kemi, Glykovetenskap.ORCID-id: 0000-0001-9832-027X
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2017 (Engelska)Ingår i: ICCM International Conferences on Composite Materials, International Committee on Composite Materials , 2017Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

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. 

Ort, förlag, år, upplaga, sidor
International Committee on Composite Materials , 2017.
Nyckelord [en]
Dispersion, Grafting, Mechanical property, Nanocellulose, Thermal property
Nationell ämneskategori
Materialteknik
Identifikatorer
URN: urn:nbn:se:kth:diva-236845Scopus ID: 2-s2.0-85053118470OAI: oai:DiVA.org:kth-236845DiVA, id: diva2:1273600
Konferens
21st International Conference on Composite Materials, ICCM 2017, 20 August 2017 through 25 August 2017
Anmärkning

QC 20181221

Tillgänglig från: 2018-12-21 Skapad: 2018-12-21 Senast uppdaterad: 2018-12-21Bibliografiskt granskad

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Yao, KunZhou, Qi

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Fiber- och polymerteknologiGlykovetenskap
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Totalt: 150 träffar
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