Published 2015 | Version v1
Miscellaneous Open

Characterization of TEMPO-oxidized bacterial cellulose

  • 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)

Files

48036451.pdf

Files (105.2 kB)

Name Size Download all
md5:bbcfeca2f83e89470e018acfddd09b44
105.2 kB Preview Download

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)