Characterization of TEMPO-oxidized bacterial cellulose
Creators
- 1. Universidade Federal Ceara (UFC), Fortaleza, CE (Brazil)
- 2. Instituto Federal do Ceara (IFCE), Fortaleza, CE (Brazil)
- 3. Embrapa Algodao, Campina Grande, PB (Brazil)
- 4. Embrapa Agroindustria Tropical, Fortaleza, CE (Brazil)
Description
The aim of this study was to characterize the TEMPO-oxidized bacterial cellulose, as a preliminary research for further application in nanocomposites. Bacterial cellulose (BC) was selectively oxidized at C-6 carbon by TEMPO radical. Oxidized bacterial cellulose (BCOX) was characterized by TGA, FTIR, XRD, and zeta potential. BCOX suspension was stable at pH 7.0, presented a crystallinity index of 83%, in spite of 92% of BC, because of decrease in the free hydroxyl number. FTIR spectra showed characteristic BC bands and, in addition, band of carboxylic group, proving the oxidation. BCOX DTG showed, in addition to characteristic BC thermal events, a maximum degradation peak at 233 °C, related to sodium anhydro-glucuronate groups formed during the cellulose oxidation. Thus, BC can be TEMPO-oxidized without great loss in its structure and properties. (author)
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48036451.pdf
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Additional details
Additional titles
- Original title (Portuguese)
- Caracterizacao de celulose bacteriana tempo-oxidada
Publishing Information
- Imprint Pagination
- 5 p.
- Report number
- INIS-BR--17267
Conference
- Title
- 13. Brazilian congress of polymers
- Original Conference Title
- 13. congresso brasileiro de polimeros
- Dates
- 18-22 Oct 2015
- Place
- Natal, RN (Brazil)
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 48036451
- Subject category
- S36: MATERIALS SCIENCE; S77: NANOSCIENCE AND NANOTECHNOLOGY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- BACTERIA; BIOTECHNOLOGY; CELLULOSE; FOURIER TRANSFORMATION; INFRARED SPECTRA; NANOCOMPOSITES; OXIDATION; THERMAL GRAVIMETRIC ANALYSIS; X-RAY DIFFRACTION
- Descriptors DEC
- CARBOHYDRATES; CHEMICAL ANALYSIS; CHEMICAL REACTIONS; COHERENT SCATTERING; DIFFRACTION; GRAVIMETRIC ANALYSIS; INTEGRAL TRANSFORMATIONS; MATERIALS; MICROORGANISMS; NANOMATERIALS; ORGANIC COMPOUNDS; POLYSACCHARIDES; QUANTITATIVE CHEMICAL ANALYSIS; SACCHARIDES; SCATTERING; SPECTRA; THERMAL ANALYSIS; TRANSFORMATIONS