My watch list
my.chemeurope.com  
Login  

Extraction and characterization of cellulose whiskers from commercial cotton fibers

Abstract   During the past few years, there has been a growing interest in incorporating cellulose whiskers from different sources as nanoreinforcement in polymer matrixes. The purpose of this study is to evaluate the performance of the cellulose whiskers obtained from Brazilian commercial cotton. In this sense, cellulose whiskers were prepared by acid hydrolysis which was carried out with a sulfuric acid solution 6.5 M at 45 and 60 °C for 75 and 20 min, respectively, and dried using different methods—an oven, a freeze dryer, and an air circulation oven. Cellulose whiskers were investigated in respect of crystallinity, thermal stability, and morphologically by scanning transmission electron microscopy. Cellulose cotton whiskers, independently of extraction conditions, provided an average length and a diameter of 150 ± 50 nm and of 14 ± 5 nm, respectively, and showed a rod-like shape. Whiskers extracted at 45 °C for 75 min have shown similar crystallinity and better thermal stability in oxidizing atmosphere. The use of the freezing dry process resulted in whiskers with better thermal stability and similar crystallinity than those obtained when dried in the air circulation oven process.

  • Content Type Journal Article
  • Pages 1-7
  • DOI 10.1007/s10853-011-5767-2
  • Authors
    • Maria Alice Martins, Universidade Federal do ABC/CCNH, Rua Santa Adélia, 166, Santo André, SP 09210-270, Brazil
    • Eliângela M. Teixeira, Embrapa Instrumentation/CNPDIA/LNNA, Rua XV de Novembro, 1452, São Carlos, SP 13560-970, Brazil
    • Ana Carolina Corrêa, Embrapa Instrumentation/CNPDIA/LNNA, Rua XV de Novembro, 1452, São Carlos, SP 13560-970, Brazil
    • Mariselma Ferreira, Universidade Federal do ABC/CCNH, Rua Santa Adélia, 166, Santo André, SP 09210-270, Brazil
    • Luiz H. C. Mattoso, Embrapa Instrumentation/CNPDIA/LNNA, Rua XV de Novembro, 1452, São Carlos, SP 13560-970, Brazil
    • Journal Journal of Materials Science
    • Online ISSN 1573-4803
    • Print ISSN 0022-2461

Journal:   Journal of Materials Science
Year:   2011
Publication date:   14-Jul-2011
Facts, background information, dossiers
More about Springer-Verlag
Your browser is not current. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE