Journal
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
Volume 28, Issue 6, Pages 777-790Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/0892705713495221
Keywords
Heat treatment; sisal fiber; polylactide; composite
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Funding
- National Nature Science Foundation of China [50903033, 50973035, 11272039]
- National Natural Science Foundation of China-Guangdong Joint Fund [U1201242]
- National Key Technology R&D Program of China [2009BAI84B05, 2011BAE15B01]
- Program for New Century Excellent Talents in University [NCET-11-0152]
- Pearl River Talent Fund for Young Sci-Tech Researchers of Guangzhou City [2011J2200058]
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Sisal fibers (SFs) were pretreated by heat treatment (HT). The SFs were mixed with a biodegradable material, polylactide (PLA), and the composites were prepared by hot press molding. The effects of the HT temperature and time on the mechanical properties of the composites were investigated, and the HT mechanism was studied by scanning electron microscopy and infrared, x-ray photoelectron, and nuclear magnetic resonance spectroscopies. The results show that an appropriate HT can remove strongly hydrophilic materials such as hemicelluloses from the fibers, and thus decrease their hydrophilicity, thereby improving the retting between the fibers and the matrix. This improves fiber-matrix interfacial adhesion, which can improve the mechanical properties of the composites. The HT also influences the fiber strength to some extent and affects the mechanical properties of composites.
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