Your browser doesn't support javascript.
loading
Thermal and spectroscopic analyses of guar gum degradation submitted to turbulent flow.
Motta, Marcus Vinícius Lisboa; de Castro, Eustáquio Vinícius Ribeiro; Muri, Emanuel José Bassani; Loureiro, Bruno Venturini; Costalonga, Michell Luiz; Filgueiras, Paulo Roberto.
Afiliação
  • Motta MVL; Federal University of Espírito Santo, - Chemistry Department, Vitória, Av. Fernando Ferrari, 514, P. O. Box: 29075-910, Goiabeiras, Vitória, E.S., Brazil; Faculdade do Centro Leste, Rodovia E.S. 010, Km 6.5, P. O. Box: 29173-087, Manguinhos, Serra, E.S., Brazil.
  • de Castro EVR; Federal University of Espírito Santo, - Chemistry Department, Vitória, Av. Fernando Ferrari, 514, P. O. Box: 29075-910, Goiabeiras, Vitória, E.S., Brazil.
  • Muri EJB; Federal University of Espírito Santo, - Chemistry Department, Vitória, Av. Fernando Ferrari, 514, P. O. Box: 29075-910, Goiabeiras, Vitória, E.S., Brazil.
  • Loureiro BV; Federal University of Espírito Santo, Mechanical Engineering Department, Vitória, Av. Fernando Ferrari, 514, P. O. Box: 29075-910, Goiabeiras, Vitória, E.S., Brazil.
  • Costalonga ML; Federal University of Espírito Santo, - Chemistry Department, Vitória, Av. Fernando Ferrari, 514, P. O. Box: 29075-910, Goiabeiras, Vitória, E.S., Brazil; Faculdade do Centro Leste, Rodovia E.S. 010, Km 6.5, P. O. Box: 29173-087, Manguinhos, Serra, E.S., Brazil.
  • Filgueiras PR; Federal University of Espírito Santo, - Chemistry Department, Vitória, Av. Fernando Ferrari, 514, P. O. Box: 29075-910, Goiabeiras, Vitória, E.S., Brazil. Electronic address: filgueiras.pr@gmail.com.
Int J Biol Macromol ; 131: 43-49, 2019 Jun 15.
Article em En | MEDLINE | ID: mdl-30849469
In this paper, a 400 ppm aqueous solution of guar gum polysaccharide was submitted to a turbulent flow regime in order to monitor molecular degradation and drag reduction. Guar gum samples were isolated and analyzed by spectroscopic, thermoanalytical and viscosimetric techniques. The drag reduction promoted by guar gum is compromised as the polysaccharide undergoes degradation. Viscosimetric analysis of guar gum showed a reduction in viscous molecular mass. Mid-infrared spectra and hydrogen nuclear magnetic resonance suggest that mechanical degradation promotes hydrolysis of the glycosidic bond α (1 → 6) releasing (d)-galactose owing to the appearance of the carbonyl functional group. Thermal analysis revealed the reduction of the polysaccharide's thermal stability by reduction of the polymer chain. A comprehensive analysis of these combined parameters affords a foundation for the development of more efficient biopolymers in the context of improved drag reduction.
Assuntos
Palavras-chave
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Análise Espectral / Termogravimetria / Gomas Vegetais / Fenômenos Químicos / Galactanos / Mananas Idioma: En Revista: Int J Biol Macromol Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Brasil País de publicação: Holanda
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Análise Espectral / Termogravimetria / Gomas Vegetais / Fenômenos Químicos / Galactanos / Mananas Idioma: En Revista: Int J Biol Macromol Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Brasil País de publicação: Holanda