期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 139, 期 12, 页码 -出版社
WILEY
DOI: 10.1002/app.51821
关键词
biodegradable; biomaterials; cellulose and other wood products; films
资金
- Hainan University [KYQD[ZR]1717]
- Key Scientific Research Project Funding of Hainan Province [ZDYF2019192]
- Hainan Provincial Natural Science Foundation [2019RC154]
In this study, coconut coir was chemically converted to coir-polyols via atmospheric liquefaction under microwave assistance, and bio-composite films with different properties were prepared. After comprehensive characterization, the optimal dosage of reinforcing agents for achieving the best balance of properties in critical parameters was determined.
In this study, coconut coir was chemically converted to coir-polyols (CP) via atmospheric liquefaction under microwave assistance, during which a combination of polyethylene glycol 400 and glycerol, and 98% sulfuric acid were applied as the liquefaction solvents and catalyst, respectively. The obtained CP was then analyzed in terms of its molecular weight distribution, hydroxyl values, and functional groups. Later, CP/polyvinyl alcohol (PVA) bio-composite films reinforced without and with coir cellulose nanofibrils (CCNF) were prepared. After comprehensive characterization, the CP/PVA films exhibited higher stability in medium-temperature range, while the CCNF/CP/PVA films on the other hand possessed higher properties of tensile strength, elongation at break, and water resistance. The proper dosage of reinforcing agents for preparing PVA-based ternary blend films were proposed at 3% of CCNF and 10% of CP (based on film dry weight), which exhibited the best balance of properties in the critical parameters such as tensile strength and elongation at break.
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