Journal
CARBOHYDRATE POLYMERS
Volume 199, Issue -, Pages 473-481Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2018.07.034
Keywords
Nanoporous cellulose gels; Polystyrene; Nanocomposites; Percolation model; Mechanical properties
Categories
Funding
- National Natural Science Foundation of China [51373125, 21422405]
- Major Program of National Natural Science Foundation of China [21334005]
- Wuhan Morning Light Plan of Youth Science and Technology [2017050304010312]
- Special Fund for the Development of Strategic Emerging Industries of Shenzhen City of China [JCYJ20170818112409808]
- Fundamental Research Funds for the Central Universities [2042017kf0195, 2042015kf0259, 2042017KF0227]
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Nanocellulose is a promising candidate as a green reinforcing nanofiller for polymer nanocomposites. Three-dimensionally nanoporous cellulose gels (NCGs) have been demonstrated to exhibit significant dispersibility and compatibilization with hydrophobic polymers. We report a simple and versatile process for the fabrication of NCG/polystyrene (PS) nanocomposites by the in situ free radical polymerization of styrene monomers within the NCG. The volume fraction of the NCG in the NCG/PS nanocomposites could be controlled from 10% to 60%. The interconnected nanofibrillar cellulose networks of the NCG were finely distributed and well preserved in the PS matrix after polymerization. Dynamic mechanical analysis revealed a remarkable reinforcement in the tensile storage modulus of the NCG/PS nanocomposites, especially above the glass transition temperature (T-g) of the PS matrix. The modified percolation model was in good agreement with the mechanical properties of the NCG/PS nanocomposites. The introduction of the NCG into the PS matrix significantly improved the flexural and tension properties of the NCG/PS nanocomposites.
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