Journal
POLYMER INTERNATIONAL
Volume 65, Issue 9, Pages 1046-1053Publisher
WILEY
DOI: 10.1002/pi.5150
Keywords
cellulose nanocrystals; poly(3-hydroxybutyrate); biodegradable polymers; nanocomposites
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Funding
- National Research Council of Argentina (CONICET)
- International Cooperation Project CNR-CONICET [1010, PIP 0014, 0527]
- National Agency of Scientific and Technological Promotion of Argentina [PICT'12 1983]
- National University of Mar del Plata
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Poly(3-hydroxybutyrate) (PHB)-based bionanocomposites were prepared using various percentages of cellulose nanocrystals (CNCs) by a solution casting method. CNCs were prepared from microcrystalline cellulose using sulfuric acid hydrolysis. The influence of CNCs on PHB properties was evaluated using differential scanning calorimetry, Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetry and tensile testing. Vapor permeation and light transmission of the materials were also measured. Differential scanning calorimetric tests demonstrated that CNCs were effective PHB nucleation agents. Tensile strength and Young's modulus of PHB increased with increasing CNC concentration. Moreover, the PHB/CNC bionanocomposites exhibited reduced water vapor permeation compared to neat PHB and had better UV barrier properties than commodity polymers such as polypropylene. It was found that nanocomposites with 6wt% of CNCs had the optimum balance among thermal, mechanical and barrier properties. (c) 2016 Society of Chemical Industry
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