期刊
JOURNAL OF POLYMERS AND THE ENVIRONMENT
卷 18, 期 4, 页码 500-509出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10924-010-0215-y
关键词
Composites; Natural fibers; Physical properties; Recycling
资金
- Japan Society for the Promotion of Science (JSPS)
Detailed analysis of the effects of recycling process on long-term water absorption, thickness swelling and water desorption behavior of natural fiber polypropylene composites is reported. Composite materials containing polypropylene and wood flour, rice hulls or bagasse fibers were produced at constant fiber loading and were exposed to a simulated recycling process consisting of up to five times grinding and reprocessing under controlled conditions. A wide range of analytical methods including water absorption/desorption tests, thickness swelling tests, density measurement, scanning electron microscopy, image analysis, contact angle, fiber length analysis and Fourier transform infrared spectroscopy was employed to understand the hygroscopic behavior of the recycled composites. Water absorption and thickness swelling behaviors were modeled using existing predictive models. Results indicated that generally the recycled composites had considerably lower water absorption and thickness swellings as compared with the original composites which were attributed to changes in physical and chemical properties of the composites induced by the recycling process.
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