期刊
JOURNAL OF SUPERCRITICAL FLUIDS
卷 190, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.supflu.2022.105758
关键词
Poly (lactic acid); Cellulose nanofibers; Crystallization; Tensile property
资金
- National Natural Science Foundation of China [52003280]
- Zhejiang Provincial Natural Science Foundation of China [LQ21B040003]
- S & T Innovation 2025 Major Special Programme of Ningbo [2021Z052]
- White Bio program of ALCA, JST [JPMJAL 1504]
- Chinese Academy of Sciences Pioneer Hundred Talents Program
This study proposes a scalable and green foam injection molding technique to produce high-performance PLA foams by adding cellulose nanofibers. The added nanofibers significantly improve the properties of PLA and enhance the foaming ability, resulting in the successful production of PLA foam material with improved performance. This green strategy opens up new possibilities for developing fully-biobased, lightweight and high-performance PLA material.
This work proposes a scalable and green foam injection molding technique to produce high-performance poly (lactic acid) (PLA) foams by adding biodegradable cellulose nanofibers (CNFs). The introduction of CNFs significantly improved the rheological properties and crystallization kinetics of PLA, resulting in improved foaming ability. Microcellular PLA/CNF composite foam containing modified CNFs was successfully obtained with minimum cell size of 5.4 mu m and a void fraction of 50%. Furthermore, compared with the pure PLA, the yield stress and tensile modulus of both of solid and foamed PLA/CNF were obviously increased. The percentage increment in the yield stress and tensile modulus for composite foam were approximately 183% and 149%, respectively. This indicated that the added CNFs remarkably ameliorated the cellular morphologies of PLA as well as reinforced the PLA foams. This green strategy opens up new perspectives for developing fully-biobased, lightweight and high-performance PLA material.
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