Bacterial cellulose-silica organic-inorganic hybrids

被引：115

作者：

Barud, H. S. ^{[1
]}

Assuncao, R. M. N. ^{[1
,2
]}

Martines, M. A. U. ^{[3
]}

Dexpert-Ghys, J. ^{[4
]}

Marques, R. F. C. ^{[1
,4
]}

Messaddeq, Y. ^{[1
]}

Ribeiro, S. J. L. ^{[1
]}

机构：

[1] Sao Paulo State Univ UNESP, Inst Chem, BR-14801970 Araraquara, SP, Brazil

[2] Univ Fed Uberlandia, Inst Chem, BR-38400902 Uberlandia, MG, Brazil

[3] Sao Paulo State Univ UNESP, FEIS, Dept Chem & Phys, BR-15385000 Ilha Solteira, SP, Brazil

[4] Univ Toulouse 3, UPR N 8011, Ctr Elaborat Mat & Etud Struct, F-31055 Toulouse, France

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2008年 / 46卷 / 03期

关键词：

bacterial cellulose; silica; organic-inorganic hybrids;

D O I：

10.1007/s10971-007-1669-9

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 [材料科学与工程]; 080502 [材料学];

摘要：

Bacterial cellulose (BC) hydrated membranes present nanometric reticulated structure that can be used as a template in the preparation of new organic-inorganic hybrids. BC-silica hybrids were prepared from BC membranes and tetraethoxysilane, (TEOS) at neutral pH conditions at room temperature. Macroscopically homogeneous membranes were obtained containing up to 66 wt.% of silica spheres, 20-30 nm diameter. Scanning electron micrographs clearly show the silica spheres attached to cellulose microfibrils. By removing the cellulose, the silica spheres can be easily recovered. The new hybrids are stable up to 300 degrees C and display a broad emission band under UV excitation assigned to oxygen-related defects at the silica particles surface. Emission color can be tuned by changing the excitation wavelength.

引用

页码：363 / 367

页数：5

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