Determination of Activation Energy in Polymeric Hydrogels Using Thermogravimetric Analysis

作者：Horn Marilia M^*; Martins Virginia C A; Plepis Ana M de G

来源：Polimeros-Ciencia e Tecnologia, 2010, 20(3): 201-204.

DOI：10.1590/S0104-14282010005000025

• Hydrogels
• activation energy
• themogravimetry
• biopolymers

Polyelectrolyte hydrogels formed by chitosan/xanthan (QX) and chitosan/xanthan/collagen (QXC) were prepared and thermogravimetric curves at different heating rates were obtained, with the aim of determining kinetic parameters using the Flynn-Wall method. The calculated activation energy was 3.44 kJ.mol(-1) (QX) and 14.84 kJ.mol(-1) (QXC), suggesting stronger interactions in QXC hydrogel structure than in the QX hydrogel, probably clue to the presence of carboxyl groups of collagen molecules.

• 出版日期2010-9