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Well‐Controlled Microcellular Biodegradable PLA/Silk Composite Foams Using Supercritical CO 2
Author(s) -
Kang Dong Jin,
Xu Deng,
Zhang Zhen Xiu,
Pal Kaushik,
Bang Dae Suk,
Kim Jin Kuk
Publication year - 2009
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.200900103
Subject(s) - fibroin , materials science , composite number , supercritical fluid , composite material , silk , chemistry , organic chemistry
PLA biodegradable composites reinforced with various silk fibroin powder contents (0, 1, 3, 5 and 7 wt.‐%) were prepared by solution processing technique using CH 2 Cl 2 as solvent. After that the composites and virgin PLA were foamed by using supercritical CO 2 . The influence of silk contents on PLA/silk fibroin powder composite foams were investigated by using SEM, XRD and DSC. Compared with PLA foam, the composite foams exhibited a reduction in cell size and increase in cell density at high silk content. With an increase in saturation temperature and pressure, the cell size was increasing and both the cell density and foam density were decreased simultaneously.