Why does condensed tannin leach more with distilled water and less with NaOH?
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Condensed tannins leach more with distilled water and less with NaOH due to the influence of different solvents and pH levels. The extraction of tannins from bark waste is affected by the type and concentration of chemicals used, with sodium carbonate solution (8%) yielding higher tannin extraction compared to sodium sulfate solution (4%). Additionally, the dissolution of polyphenolic compounds from tannin powder is influenced by parameters like temperature and stirring time, impacting the percentage of dissolved tannin residue. Furthermore, the desulfonation of sulfonic acid derivatives in tannins allows for their use in water-resistant adhesives, with sulfonates being good leaving groups under specific conditions. These factors collectively contribute to the varying leaching behavior of condensed tannins with different solvents like distilled water and NaOH.
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Open access 17 Feb 2017 10 Citations | Condensed tannin leaches more with distilled water due to its polar nature, while leaching less with NaOH as it forms complexes with the tannins, reducing solubility. |
3 Citations | Condensed tannin leaches more with distilled water due to its dissolution properties, while leaching less with NaOH as it may not effectively break down the tannin structure. |
| Condensed tannins leach more with distilled water due to their water solubility increase from sulphonation, while leaching less with NaOH due to reduced solubility in alkaline conditions. | |
17 Dec 2018 | Condensed tannin leaches more with distilled water due to its ability to precipitate with formaldehyde, forming a rigid polymer structure, while leaching less with NaOH due to different extraction mechanisms. |
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