Journal
INDUSTRIAL CROPS AND PRODUCTS
Volume 112, Issue -, Pages 449-459Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.indcrop.2017.12.044
Keywords
Particle-reinforcement; Polymer-matirx composites; Mechanical properties; Cellulose fiber
Categories
Funding
- Science and Technology Project of Guangdong [2015B010122002]
- Science and Technology Project of Huadu [HD15CXY011]
- China Scholarship Council (CSC)
- Louisiana Board of Regents [LEQSF(2015-17)-RD-B-01]
- USDA National Institute of Food and Agriculture McIntire Stennis project [1000017]
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Cellulose nanocrystals (CNCs) were extracted from waste cottonseed hulls, The obtained CNCs were grafted with maleic anhydride (MA) and then in-situ crosslinked with Poly(lactic acid) (PLA) using dicumyl peroxide (DCP) as the crosslinking initiator. MA-grafted CNCs (MACNCs) exhibited improved dispersion state than that;of pristine CNCs in the PLA matrix. The in-situ crosslinking reaction further provided a strong bridge for chemical bonding between MACNCs and PLA. The resultant PLA/MACNC composites showed a comprehensive improvement in both tensile and thermomechanical performances. At the 5 wt.% loading rate of MACNCs, the ultimate tensile strength and Young's modulus of crosslinking PLA/MACNC composites reached 56.3 and 1550 MPa, respectively, representing 73.2% and 122.7% increases compared with these of pristine PLA/CNC composite. Dynamic mechanical analysis results indicated that the crosslinking PLA/MACNCs film had the highest storage modulus in both the glassy (30 degrees C) and rubbery (80 degrees C) stages.
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