UV Induced Cross-linking of Starch Modified with Glycidyl Methacrylate
Artikel i vetenskaplig tidskrift, 2009

A new way to substitute cornstarch with glycidyl methacrylate (GMA) monomers is presented. This synthetic modification, carried out in DMSO, resulted in a DOS of 0.08. By exposing a water solution with modified starch and potassium persulfate (KPS), a radical initiator, to UV-light a free radical vinyl polymerization reaction is initiated making the starch solution chemically cross-link into a gel. The GMA modification increased the hydrophobicity of the polymer making it less water-soluble, increasing the adsorption tendency to a hydrophobic surface as seen in quartz crystal microbalance with dissipation monitoring (QCM-D) studies. The surface cross-linking process of the modified starch showed that after cross-linking the solubility of the polymer decreased resulting in a stronger adsorbed polymer to the surface compared to the non-modified starch. This proves that even though it is generally believed to be more difficult to cross-link polymers at surfaces this particular modification allowed for near complete cross-linking as suggested by the QCM-D data.

Cross-linking

QCM-D

UV

Hydrogel

Starch

GMA

Författare

Jesper Hedin

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Åsa Östlund

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Magnus Nydén

SuMo Biomaterials

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Carbohydrate Polymers

0144-8617 (ISSN)

Vol. 79 606-613

Ämneskategorier

Kemiteknik

DOI

10.1016/j.carbpol.2009.09.019