Oxidized Xanthan Gum and Chitosan as Natural Adhesives for Cork

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

Authors

Diana Paiva (Author) FEUP; Carolina Gonçalves (Author) FEUP; Isabel Vale (Author) Other; Margarida M. S. M. Bastos (Author) FEUP; Fernão D. Magalhães (Author) FEUP

Journal

Title: Polymers

Vol. 8 No. 7

Pages: 1-13

Publisher: MDPI

Indexing

ISI Web of Knowledge - 10 Citations

Scopus - 0 Citations

INSPEC

Associated Projects

LEPABE - Laboratório de Engenharia de Processos, Ambiente, Biotecnologia e Energia

GlueCork - SI IDT - 23043/2011 - Rolhas técnicas de cortiça de origem 100% natural

LEPABE-2-ECO-INNOVATION - LEPABE-2-ECO-INNOVATION

Other information

Authenticus ID: P-00K-QMW

DOI: 10.3390/polym8070259

Abstract (EN): Natural cork stopper manufacturing produces a significant amount of cork waste, which is granulated and combined with synthetic glues for use in a wide range of applications. There is a high demand for using biosourced polymers in these composite materials. In this study, xanthan gum (XG) and chitosan (CS) were investigated as possible natural binders for cork. Xanthan gum was oxidized at two different aldehyde contents as a strategy to improve its water resistance. This modification was studied in detail by H-1 and C-13 nuclear magnetic resonance (NMR), and the degree of oxidation was determined by the hydroxylamine hydrochloride titration method. The performance of the adhesives was studied by tensile tests and total soluble matter (TSM) determinations. Xanthan gum showed no water resistance, contrary to oxidized xanthan gum and chitosan. It is hypothesized that the good performance of oxidized xanthan gum is due to the reaction of aldehyde groups-formed in the oxidation process-with hydroxyl groups on the cork surface during the high temperature drying. Combining oxidized xanthan gum with chitosan did not yield significant improvements.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 13