Lignin gel with unique swelling property.
Lignin gels were prepared from acetic acid lignin by use of polyethylene glycol diglycidyl ether as cross-linker. The gels were found to swell in aqueous ethanol solution, in particular 50% (v/v) solution. In addition, they also swelled in alkaline solution and shrank upon heating. A literature search showed that investigation on gel swelling in aqueous ethanol has not been reported so far. Gels prepared from the cross-linker alone and its analogues did not show such swelling characteristics in aqueous ethanol. Therefore, the unique swelling property must be attributable to an intrinsic property of lignin.
Nishida
Mitsukuni
M
Laboratory of Wood Chemistry, Division of Applied Bioscience, Graduate School of Agriculture, Hokkaido University, Kita-9, Nishi-9, -ku, Sapporo 060-8589, Kita, Japan.
Uraki
Yasumitsu
Y
Sano
Yoshihiro
Y
D019342:Acetic Acid / Q000737:chemistry; D003247:Conservation of Natural Resources; D003432:Cross-Linking Reagents; D000431:Ethanol / Q000737:chemistry; D005782:Gels; D008031:Lignin / Q000737:chemistry*; D008422:Materials Testing; D011092:Polyethylene Glycols; D012997:Solvents / Q000737:chemistry
D003432:Cross-Linking Reagents; D005782:Gels; D012997:Solvents; D000431:Ethanol; D011092:Polyethylene Glycols; D008031:Lignin; D019342:Acetic Acid