Naturally Occurring alpha-Hydroxy Acids: Useful Organocatalysts for the Acetylation of Cellulose Nanofibres

被引：6

作者：

Avila Ramirez, Jhon A. ^{[1
,2
]}

Gomez Hoyos, Catalina ^{[3
]}

Arroyo, Silvana ^{[4
]}

Cerrutti, Patricia ^{[1
,5
]}

Foresti, Maria L. ^{[1
,2
]}

机构：

[1] Univ Buenos Aires, Engn Fac, Inst Polymer Technol & Nanotechnol ITPN, Biotechnol & Biosynth Grp, CP 1127AAR, RA-2214 Buenos Aires, DF, Argentina

[2] Natl Sci & Tech Res Council CONICET, Buenos Aires, DF, Argentina

[3] Univ Pontificia Bolivariana, Sch Engn, Circular 1 70-01, Medellin, Colombia

[4] Univ Buenos Aires, Engn Fac, Inst Sci Technol & Engn INTECIN, Amorphous Solids Lab, Paseo Colon 850,C1063ACV, Buenos Aires, DF, Argentina

[5] Univ Buenos Aires, Engn Fac, Chem Engn Dept, Buenos Aires, DF, Argentina

来源：

CURRENT ORGANOCATALYSIS | 2016年 / 3卷 / 02期

关键词：

Acetylation; bacterial nanocellulose; organocatalysis; alpha-hydroxy acids;

D O I：

10.2174/2213337202666150428232503

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 [物理化学]; 081704 [应用化学];

摘要：

Cellulose nanoribbons obtained from bacterial fermentation have been esterified by means of a solventless organocatalytic route. The esterification methodology involves acetic anhydride as acylant and three different alpha-hydroxy acids were tested as organocatalysts. By tuning the acetylation interval, bacterial nanocellulose (BNC) with varying degree of substitution could be obtained (i.e. DS= 0.27-0.90). Esterified BNC has been characterized in terms of its morphology, chemical structure, crystallinity, wettability and dispersibility in different solvents. The results indicate the efficacy of the present methodology for the smooth acetylation of cellulose nanoribbons at moderate conditions, thereby expanding the role of organocatalysts in reducing the hydrophilicity of bacterial cellulose nanoribbons.

引用

页码：161 / 168

页数：8

共 28 条

[1]

Surface esterification of cellulose nanofibers by a simple organocatalytic methodology [J].