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Article

Mechanical Characterization of Biopolymer-Based Hydrogels Enriched with Paulownia Extracts Recovered Using a Green Technique

Chemical Engineering Department, Universidad de Vigo (Campus Ourense), Edificio Politécnico, As Lagoas, 32004 Ourense, Spain
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Appl. Sci. 2020, 10(23), 8439; https://doi.org/10.3390/app10238439
Received: 19 November 2020 / Revised: 24 November 2020 / Accepted: 25 November 2020 / Published: 26 November 2020
This study deals with the development and mechanical characterization of innovative starch- and gelatin-based hydrogels enriched with hydrothermal aqueous extracts from Paulownia (i.e., bark, leaves, petioles). The color, rheology, and texture properties of formulated biopolymer-based hydrogels depending on the processing conditions of the extracts was evaluated for the different Paulownia fractions. Results indicated that a clear impact on color features of the tested hydrogels was observed with the incorporation of Paulownia extracts. Rheological testing showed that weak and intermediate strength hydrogels were identified for starch- and gelatin-based hydrogels independently of used extract. A relevant softening of all gelled matrices was observed in the presence of recovered liquor extracts involving the following trend (leaves > barks > petioles). For all fractions, the highest viscoelastic features were achieved for hydrogels made with extracts recovered at 140 °C. Texture outcomes confirmed the rheological achievements. No syneresis was observed in developed hydrogels after two weeks of cold storage. View Full-Text
Keywords: paulownia; autohydrolysis; hydrogels; starch; gelatin; rheology paulownia; autohydrolysis; hydrogels; starch; gelatin; rheology
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MDPI and ACS Style

Rodríguez-Seoane, P.; Domínguez, H.; Torres, M.D. Mechanical Characterization of Biopolymer-Based Hydrogels Enriched with Paulownia Extracts Recovered Using a Green Technique. Appl. Sci. 2020, 10, 8439. https://doi.org/10.3390/app10238439

AMA Style

Rodríguez-Seoane P, Domínguez H, Torres MD. Mechanical Characterization of Biopolymer-Based Hydrogels Enriched with Paulownia Extracts Recovered Using a Green Technique. Applied Sciences. 2020; 10(23):8439. https://doi.org/10.3390/app10238439

Chicago/Turabian Style

Rodríguez-Seoane, Paula, Herminia Domínguez, and María D. Torres 2020. "Mechanical Characterization of Biopolymer-Based Hydrogels Enriched with Paulownia Extracts Recovered Using a Green Technique" Applied Sciences 10, no. 23: 8439. https://doi.org/10.3390/app10238439

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