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

Applied Sciences

Paula Rodríguez-Seoane¹  MaríaDolores Torres¹  Herminia Domínguez¹ 

[1] Chemical Engineering Department, Universidad de Vigo (Campus Ourense), Edificio Politécnico, As Lagoas, 32004 Ourense, Spain;

关键词: paulownia;    autohydrolysis;    hydrogels;    starch;    gelatin;    rheology;   

DOI  :  10.3390/app10238439

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown