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Review

Technological Application of Tannin-Based Extracts

1
Nutrition and Bromatology Group, Analytical and Food Chemistry Department, Faculty of Food Science and Technology, University of Vigo, Ourense Campus, E-32004 Ourense, Spain
2
Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolonia, 5300-253 Bragança, Portugal
*
Author to whom correspondence should be addressed.
Academic Editor: Teresa Escribano-Bailón
Molecules 2020, 25(3), 614; https://doi.org/10.3390/molecules25030614
Received: 19 December 2019 / Revised: 27 January 2020 / Accepted: 29 January 2020 / Published: 30 January 2020
(This article belongs to the Special Issue Tannin Analysis, Chemistry, and Functions)
Tannins are polyphenolic compounds naturally found in vegetables. Their presence in nature has prompted their historical use in many different ways. The revision of their traditional utilization has allowed their further modification aiming for an industrial application. Sometimes these modifications have implied the addition of harmful substances such as formaldehyde, classified as a carcinogen of category B1. In other cases, these natural tannins have been replaced by synthetic compounds that threaten human and animal health and damage the environment. Therefore, currently, both academy and industry are searching for the substitution of these unsafe complexes by the increasing inclusion of tannins, natural molecules that can be obtained from several and diverse renewable resources, modified using harmless additives. To achieve promising results, cost-efficient and eco-friendly extraction methods have been designed. Once these green alternatives have been isolated, they have been successfully applied to many fields with very assorted aims of utilization such as coagulants, adhesives, floatation agents, tannings, dyes, additives, or biomolecules. Therefore, this review offers a global vision of the full process that involves the tannin’s technological application including an overview of the most relevant tannin sources, effective extraction methods, and their utilization in very diverse fields. View Full-Text
Keywords: tannins; natural molecules; additives; traditional utilization; industrial application; human and animal health tannins; natural molecules; additives; traditional utilization; industrial application; human and animal health
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MDPI and ACS Style

Fraga-Corral, M.; García-Oliveira, P.; Pereira, A.G.; Lourenço-Lopes, C.; Jimenez-Lopez, C.; Prieto, M.A.; Simal-Gandara, J. Technological Application of Tannin-Based Extracts. Molecules 2020, 25, 614. https://doi.org/10.3390/molecules25030614

AMA Style

Fraga-Corral M, García-Oliveira P, Pereira AG, Lourenço-Lopes C, Jimenez-Lopez C, Prieto MA, Simal-Gandara J. Technological Application of Tannin-Based Extracts. Molecules. 2020; 25(3):614. https://doi.org/10.3390/molecules25030614

Chicago/Turabian Style

Fraga-Corral, Maria, Paula García-Oliveira, Antia G. Pereira, Catarina Lourenço-Lopes, Cecilia Jimenez-Lopez, Miguel A. Prieto, and Jesus Simal-Gandara. 2020. "Technological Application of Tannin-Based Extracts" Molecules 25, no. 3: 614. https://doi.org/10.3390/molecules25030614

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