Surface acetylation of bacterial cellulose

被引：16

作者：

Dae-Young Kim

Yoshiharu Nishiyama

Shigenori Kuga

机构：

[1] College of Life Resources Science,Dongguk University, Department of Forest Resources

[2] Pill-dong,The University of Tokyo, Department of Biomaterials Science

[3] Graduate School of Agricultural and Life Sciences,undefined

来源：

Cellulose | 2002年 / 9卷

关键词：

Bacterial cellulose (BC); Surface acetylation;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Bacterial cellulose was partially acetylated by the fibrous acetylationmethod to modify its physical properties, while preserving the microfibrillarmorphology. The overall degree of substitution was varied from 0.04 to 2.77 bychanging the amount of acetic anhydride added. X-ray diffraction of thepartially acetylated samples showed the crystalline pattern of unmodified celluloseI up to moderate degrees of acetylation, and the change in peak widthsindicatedthat acetylation proceeded from the surface of microfibrils, leaving the coreportion unreacted. Scanning electron microscopy revealed that even low levelsofacetylation were effective to maintain the original microfibrillar morphologyofbacterial cellulose on direct drying from water.

引用

页码：361 / 367

页数：6

共 31 条

[1]

Brown R.M.(1976)Adsorption of gases in multimolecular layers Proc. Natl. Acad. Sci. USA 73 4565-1340

[2]

Willison J.H.(1938)Surface modified cellulose microfibrils, method for making the same, and use thereof as a filler in composite materials J. Am. Chem. Soc. 60 309-107

[3]

Richardson C.L.(1997)Fiber-reinforced cellulosic thermoplastic composites International Patent WO97–12 917-465

[4]

Brunauer S.D.(1999)Partially acetylated cellulose-its properties and potential applications J. Appl. Polymer Sci. 73 1329-2253

[5]

Emmett R.H.(1965)The analytical and structural aspects of the infrared spectroscopy of cellulose acetate Tappi 48 103-2261

[6]

Teller E.(1962)Cellulosic nanocomposites. I. Thermally deformable cellulose hexanoates from heterogeneous reaction Tappi 45 460-1651

[7]

Cavaillé J.Y.(2000)Cellulosic nanocomposites. II. Studies by atomic force microscopy J. Appl. Polymer Sci. 78 2242-127

[8]

Chanzy H.(2000)Elastic modulus of the crystalline regions of cellulose polymorphs J. Appl. Polymer Sci. 78 2254-169

[9]

Fleury E.(1995)Ultrastructural aspects of the acetylation of cellulose J. Polym. Sci., Part B: Polym. Phys. 33 1647-1187

[10]

Sassi J.F.(1995)Continuous cellulose fiber-reinforced cellulose ester composites. II. Fiber surface modification and consolidation conditions Cellulose 2 111-undefined

← 1 2 3 4 →