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UV Induced Cross-linking of Starch Modified with Glycidyl Methacrylate

Jesper Hedin (Institutionen för kemi- och bioteknik, Teknisk ytkemi) ; Åsa Östlund (Institutionen för kemi- och bioteknik, Teknisk ytkemi) ; Magnus Nydén (SuMo Biomaterials ; Institutionen för kemi- och bioteknik, Teknisk ytkemi)
Carbohydrate Polymers (0144-8617). Vol. 79 (2009), 3, p. 606-613.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Cross-linking; GMA; Hydrogel; QCM-D; Starch; UV



Denna post skapades 2010-01-18. Senast ändrad 2016-07-18.
CPL Pubid: 108422

 

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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Teknisk ytkemi (2005-2014)
SuMo Biomaterials

Ämnesområden

Kemiteknik

Chalmers infrastruktur