hi, Please check if this might take you towards the next step of thought;
Quite an old publication.
Effects of viscosity on the bitterness and astringency of grape seed tannin -
Food Quality and Preference, [Volume 7, Issues 3–4] July–October 1996, Pages 161-166.
-I am also not sure if beta-cylcodextrin can be used to encapsulate this tannin somehow. You may check some papers in that direction as well.
-Polyacrylamide gels may be a research wise solution, but not sure how far this can be applied practically.
-masking the bitterness might be the most feasible option using some gums, sweetners or others
- or apply a 50/50 approach, adsorption followed by masking the remaining tannins.
-identify what type of compounds are more reactive to tannin and possibly removing its effect that way..