Structural, thermal and rheological characterization of modified Dalbergia sissoo gum--A medicinal gum.
Int J Biol Macromol
; 84: 236-45, 2016 Mar.
Article
en En
| MEDLINE
| ID: mdl-26709145
ABSTRACT
Dalbergia sissoo gum was purified by ethanol precipitation. The purified gum was modified and hydrolyzed. Gum was modified by performing polyacrylamide grafting and carboxymethylation methods. The hydrolysis was carried out by using mannanase, barium hydroxide and trifluoroacetic acid. The modified and hydrolyzed gums were characterized using thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The decrease in viscosity was studied by performing the flow test. The modified and hydrolyzed gums were thermally stable as compared to crude gum. There was increase in crystallinity after modification and hydrolysis, determined through XRD. FTIR analysis exhibits no major transformation of functional group, only there was change in the intensity of transmittance. It is concluded that the modified and hydrolyzed gum can be used for pharmaceutical and food industry.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Reología
/
Estructura Molecular
/
Dalbergia
/
Gomas de Plantas
Idioma:
En
Revista:
Int J Biol Macromol
Año:
2016
Tipo del documento:
Article
País de afiliación:
Pakistán