抄録
New cellulose derivatives were prepared by the regioselective derivatization of cellulose with L-lactide (LA) and ε-caprolactone (CL) in a lithium chloride/N, N-dimethylacetamide solvent system, and investigated for their characteristics by spectroscopic analyses, calorimetry, solvent solubility/enzymatic degradability tests. Fourier transform Raman spectra of cellulose derivatives confirmed that the LA and CL molecules were covalently introduced into cellulose at the hydroxyl groups through the ring-opening esterification catalyzed by LiCl. The 13C nuclear magnetic resonance analysis indicated that the ring-opened LA and CL were regioselectively combined with cellulose C6-OH. Moreover, LA and CL portions were partially grafted on the cellulose backbone, like a comb-shaped architecture. Both cellulose derivatives were highly soluble in dimethyl-sulfoxide available for material forming. A part of cellulose-LA was swollen or soluble in water, while cellulose-CL had poor affinity for water. The solvent solubility depended on the introduced amounts of cyclic esters. Enzymatic degradation of cellulose derivatives immediately occurred by the cellulase treatment even under the mild conditions that commercial cellulose diacetate could not be hydrolyzed. The cellulose derivatives also showed thermodynamic characteristics. Thus, the cellulose derivatives prepared in this study are expected as a biomass-based eco-material in practical applications.
| 元の言語 | 英語 |
|---|---|
| ページ（範囲） | 257-261 |
| ページ数 | 5 |
| ジャーナル | Appita Annual Conference |
| 巻 | 3 |
| 出版物ステータス | 出版済み - 12 1 2005 |
| イベント | 59th Appita Annual Conference and Exhibition, incorporating the 13th ISWFPC: International Symposium on Wood, Fibre and Pulping Chemistry - Auckland, ニュージ―ランド 継続期間: 5 16 2005 → 5 19 2005 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Media Technology
これを引用
Preparation and characterization of cellulose derivatives by regioseleclive esterification of biodegradable cyclic esters. / Mayumi, Ayaka; Kttaoka, Takuya; Wariishi, Hiroyuki.
：: Appita Annual Conference, 巻 3, 01.12.2005, p. 257-261.研究成果: ジャーナルへの寄稿 › Conference article
}
TY - JOUR
T1 - Preparation and characterization of cellulose derivatives by regioseleclive esterification of biodegradable cyclic esters
AU - Mayumi, Ayaka
AU - Kttaoka, Takuya
AU - Wariishi, Hiroyuki
PY - 2005/12/1
Y1 - 2005/12/1
N2 - New cellulose derivatives were prepared by the regioselective derivatization of cellulose with L-lactide (LA) and ε-caprolactone (CL) in a lithium chloride/N, N-dimethylacetamide solvent system, and investigated for their characteristics by spectroscopic analyses, calorimetry, solvent solubility/enzymatic degradability tests. Fourier transform Raman spectra of cellulose derivatives confirmed that the LA and CL molecules were covalently introduced into cellulose at the hydroxyl groups through the ring-opening esterification catalyzed by LiCl. The 13C nuclear magnetic resonance analysis indicated that the ring-opened LA and CL were regioselectively combined with cellulose C6-OH. Moreover, LA and CL portions were partially grafted on the cellulose backbone, like a comb-shaped architecture. Both cellulose derivatives were highly soluble in dimethyl-sulfoxide available for material forming. A part of cellulose-LA was swollen or soluble in water, while cellulose-CL had poor affinity for water. The solvent solubility depended on the introduced amounts of cyclic esters. Enzymatic degradation of cellulose derivatives immediately occurred by the cellulase treatment even under the mild conditions that commercial cellulose diacetate could not be hydrolyzed. The cellulose derivatives also showed thermodynamic characteristics. Thus, the cellulose derivatives prepared in this study are expected as a biomass-based eco-material in practical applications.
AB - New cellulose derivatives were prepared by the regioselective derivatization of cellulose with L-lactide (LA) and ε-caprolactone (CL) in a lithium chloride/N, N-dimethylacetamide solvent system, and investigated for their characteristics by spectroscopic analyses, calorimetry, solvent solubility/enzymatic degradability tests. Fourier transform Raman spectra of cellulose derivatives confirmed that the LA and CL molecules were covalently introduced into cellulose at the hydroxyl groups through the ring-opening esterification catalyzed by LiCl. The 13C nuclear magnetic resonance analysis indicated that the ring-opened LA and CL were regioselectively combined with cellulose C6-OH. Moreover, LA and CL portions were partially grafted on the cellulose backbone, like a comb-shaped architecture. Both cellulose derivatives were highly soluble in dimethyl-sulfoxide available for material forming. A part of cellulose-LA was swollen or soluble in water, while cellulose-CL had poor affinity for water. The solvent solubility depended on the introduced amounts of cyclic esters. Enzymatic degradation of cellulose derivatives immediately occurred by the cellulase treatment even under the mild conditions that commercial cellulose diacetate could not be hydrolyzed. The cellulose derivatives also showed thermodynamic characteristics. Thus, the cellulose derivatives prepared in this study are expected as a biomass-based eco-material in practical applications.
UR - http://www.scopus.com/inward/record.url?scp=29344472828&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=29344472828&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:29344472828
VL - 3
SP - 257
EP - 261
JO - Appita Annual Conference
JF - Appita Annual Conference
SN - 1443-5454
ER -