Dissolution of condensed tannin powder-based polyphenolic compound in water-glycerol-acid solution

Dissolution of polyphenolic compounds from condensed tannins powder from wattle species was carried out using water-glycerol mixtures and sulfuric acid (H2SO4) as a catalyst. The study focused on parameters that can be adjusted to maximize the dissolution. The parameters of the dissolution process (...

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Bibliographic Details
Published in:Bioresources 2021-02, Vol.16 (1), p.1798-1815
Main Authors: Kamarudin, Nuruldiyanah, Awang Biak, Dayang Radiah, Zainal Abidin, Zurina, Cardona, Francisco, Sapuan, S. M.
Format: Article
Language:English
Subjects:
Acids
Adhesives
Bond strength
Catalysts
Dissolution
Glycerol
Glycerol-Water
Phenols
Polyphenols
Powder
Process parameters
Response surface methodology
Solvents
Stirring
Sulfuric acid
Tannins
Temperature
Viscosity
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Summary:Dissolution of polyphenolic compounds from condensed tannins powder from wattle species was carried out using water-glycerol mixtures and sulfuric acid (H2SO4) as a catalyst. The study focused on parameters that can be adjusted to maximize the dissolution. The parameters of the dissolution process (mass of glycerol, mass of tannin powder, temperature and stirring time) were screened using a one factor at a time (OFAT) technique, while the optimum conditions were obtained using response surface methodology (RSM). Effects of the mass of glycerol, mass of tannin powder, temperature, and stirring time used on the percentage of dissolved tannin residue was apparent. The amount of undissolved tannin was used as the direct measurement in this study since there is no established method available to test tannin dissolution in water-glycerol-acid solution. The result from RSM based on 30 experimental sets showed that the lowest undissolved tannin powder value was 10% when 75 grams of tannin powder was mixed with 13.56 grams of glycerol, 86.44 grams of water, and 1.00 grams of sulphuric acid, at 75 °C temperature and 44.13 minutes stirring time.
ISSN:1930-2126
1930-2126
DOI:10.15376/biores.16.1.1798-1815