Thermo-compression molding of chitosan with a deep eutectic mixture for biofilms development

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Andrea C. Galvis-Sánchez (Author) FEUP; Ana M. M. Sousa (Author) FEUP; Loic Hilliou (Author) Other; Maria P. Gonçalves (Author) FEUP; Hiléia K.S. Souza (Author) FEUP

Journal

Title: Green Chemistry

Vol. 18

Pages: 1571-1580

ISSN: 1463-9262

Publisher: Royal Society of Chemistry

Indexing

ISI Web of Knowledge - 33 Citations

ISI Web of Science

Scopus - 35 Citations

Scientific classification

FOS: Engineering and technology

Other information

Authenticus ID: P-00K-AGD

DOI: 10.1039/c5gc02231b

Abstract (EN): A eutectic mixture of choline chloride (ChCl) and citric acid (CA) was successfully used for the preparation of chitosan (Chit) bio-films by thermo-compression molding. Optimization of the film preparation conditions was carried out using response surface methodology and a Box-Behnken design based on the best mechanical properties and lowest energetic requirements (lower compression load and time). The optimum film, made with chitosan and ChCl-CA (eutectic mixture), was compared with films prepared using only CA in their formulation. Chit-ChCl-CA films presented higher elasticity, opacity and total color difference, and a lower tensile strength in relation to the Chit-CA films. Films prepared with the eutectic mixture presented higher water vapor permeability values. These results were associated with the films microstructures. FTIR analysis confirms the occurrence of chemical changes in the processed films. The thermo-compression process significantly affects the crystallinity of the pristine chitosan. The films thermal stability is depressed when compared to the stability of each component. © The Royal Society of Chemistry 2016.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10