AI Article Synopsis
- The study investigates the effects of turbulent flow on a 400 ppm solution of guar gum, focusing on how molecular degradation impacts drag reduction.
- Analysis techniques like spectroscopy and viscosimetry reveal that the drag reduction benefits diminish as the guar gum breaks down, mainly due to hydrolysis of its glycosidic bonds.
- Results also indicate that this degradation reduces the thermal stability of the polysaccharide, providing insights necessary for developing more efficient biopolymers to enhance drag reduction.
Article Abstract
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.
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| http://dx.doi.org/10.1016/j.ijbiomac.2019.03.037 | DOI Listing |
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