UV Induced Cross-linking of Starch Modified with Glycidyl Methacrylate
Journal article, 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

Author

Jesper Hedin

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

Åsa Östlund

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

Magnus Nydén

SuMo Biomaterials

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

Carbohydrate Polymers

0144-8617 (ISSN)

Vol. 79 3 606-613

Subject Categories

Chemical Engineering

DOI

10.1016/j.carbpol.2009.09.019

More information

Created

10/7/2017