期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 11, 页码 9250-9254出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b01329
关键词
cellulose nanofibers; foamability; foam injection molding; melt strength; shish-kebab
资金
- Japan Society for Promotion of Science (JSPS) [26289289]
- Grants-in-Aid for Scientific Research [26289289] Funding Source: KAKEN
Herein, an ultrahigh 18-fold expansion of isotactic polypropylene (iPP)/cellulose nanofiber (CNF) nanocomposite foams was achieved for the first time using a core-back foam injection molding technique. It was found that CNFs were well dispersed and aligned along the cell wall in the core-back direction. Interestingly, the formations of a hybrid shish-kebab of CNFs and classic shish-kebab of PP were simultaneously achieved in the PP/CNF composites. Finally, we proposed that the combination of local strong melt strength, probably resulting from the strong alignment of CNFs and subsequent formation of hybrid shish-kebab structures, and weak melt strength in the unreinforced PP melt might be the driving force for remarkably enhancing the PP foamability.
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