Effect of addition of water-soluble chitin on amylose film.
Amylose films blended with chitosan, which were free from additives such as acid, salt, and plasticizer, were prepared by casting mixtures of an aqueous solution of an enzymatically synthesized amylose and that of water-soluble chitin (44.1% deacetylated). The presence of a small amount of chitin (less than 10%) increased significantly the permeability of gases (N2, O2, CO2, C2H4) and improved the mechanical parameters of amylose film; particularly, the elastic modulus and elongation of the blend films were larger than those of amylose or chitin films. No antibacterial activity was observed with either amylose or water-soluble chitin films. But amylose films having a small amount of chitin showed strong antibacterial action, suggesting a morphological change in water-soluble chitin on the film surface by blending with amylose molecule. These facts suggested the presence of a molecular complex of amylose and chitosan.
Suzuki
Shiho
S
Graduate School of Life & Environmental Sciences, Osaka Prefecture University, 1-1 Gakuen-cho, Sakai, Osaka, 599-8531 Japan.
Shimahashi
Katsumasa
K
Takahara
Junichi
J
Sunako
Michihiro
M
Takaha
Takeshi
T
Ogawa
Kozo
K
Kitamura
Shinichi
S
D000107:Acetylation; D000688:Amylose / Q000737:chemistry*; D000890:Anti-Infective Agents / Q000494:pharmacology; D001672:Biocompatible Materials / Q000737:chemistry*; D002686:Chitin / Q000737:chemistry*; D048271:Chitosan / Q000737:chemistry* / Q000378:metabolism; D004337:Drug Carriers / Q000737:chemistry; D004355:Drug Stability; D006863:Hydrogen-Ion Concentration; D046911:Macromolecular Substances / Q000737:chemistry*; D008970:Molecular Weight; D010539:Permeability; D013314:Stress, Mechanical; D013696:Temperature; D014867:Water / Q000737:chemistry*; D014961:X-Ray Diffraction
D000890:Anti-Infective Agents; D001672:Biocompatible Materials; D004337:Drug Carriers; D046911:Macromolecular Substances; C400945:water soluble chitin; D014867:Water; D002686:Chitin; D000688:Amylose; D048271:Chitosan