期刊
CELLULOSE
卷 24, 期 8, 页码 3313-3322出版社
SPRINGER
DOI: 10.1007/s10570-017-1324-8
关键词
Cellulose nanofibrils; Poly (lactic acid); Pickering emulsion; Composites
资金
- National Natural Science Foundation of China [51403035]
- Programme of Introducing Talents of Discipline to Universities [105-07-005735]
- Fundamental Research Funds for the Central Universities [15D110510]
Preparation of cellulose nanofibril (CNF)reinforced, biodegradable polymer composites is challenging in that it's hard to achieve good dispersion of the hydrophilic cellulose fibers in a hydrophobic polymer matrix. In this work, we developed a surfactant-free and efficient process to prepare CNF-reinforced poly (lactic acid) (PLA) composites from an aqueous dichloromethane Pickering emulsion selfemulsified by CNFs. CNF/PLA composites of homogeneous dispersion were obtained upon evaporation of CH2Cl2, filtration, drying and hot-pressing. Differential scanning calorimetry measurement revealed an enhanced crystallization capacity of the CNF/PLA composites. Thermogravimetric analysis indicated an increase of onset degradation temperature. The composites displayed an enhanced storage modulus compared with neat PLA throughout the testing temperature range, and especially in the high-temperature region (>70 degrees C). Enhancements of the flexural modulus and strength were also achieved.
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