期刊
CARBOHYDRATE POLYMERS
卷 78, 期 4, 页码 799-805出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2009.06.019
关键词
Nanocellulose; Organic/inorganic; Hybrid; Crosslinking; Sol-gel process
The cellulose/silica hybrid biomaterials are prepared by sol-gel covalent crosslinking process. The tetraethoxysilane (TEOS) as precursor, gamma-aminopropyltriethoxylsilane (APTES) as couple agent, and 2,4,6-tri[(2-epihydrin-3-bimethyl-ammonium)propyl]-1,3,5-triazine chloride (Tri-EBAC) as crosslinking agent, are used in the sol-gel crosslinking process. The chemical and morphological structures of cellulose/silica covalent crosslinking hybrids are investigated with micro-FT-IR spectra, nitrogen element analysis, X-ray diffraction, SEM, AFM, and DSC. The results show that the cellulose/silica hybrids form new macromolecular structures. In sol-gel process, inorganic particles are dispersed at the nanometer scale in the cellulose host matrix, bounding to the cellulose through covalent bonds. The cellulose/silica covalent crosslinking hybrid can form good and smooth film on the cellulose. The thermal properties of organic/inorganic hybrids are improved. (C) 2009 Elsevier Ltd. All rights reserved.
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