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Synthesis, characterization and investigation of thermal response of novel hydrogel based on PEG and AN

Nooshin Zandi

The blending hydrogel of hydrophilic- hydrophobic networks produce phaseseparated composite hydrogels. In this report, we have synthesized blend hydrogel based on PEG with molecular weight (2000 MW) and AN as monomer. Hydrogel were characterized by the swelling of the network, namely by the equilibrium- swelling ratio. Swelling of the hydrogel was studied in buffer solution of phosphate saline buffer (PBS) at 25°C. In order to characterization, hydrogel structure was investigate via FT-IR, Scanning electron microscopy (SEM) (LEO-1455VP) was usedto investigation the surface morphology of nanohydrogel,Transmission electron microscopy (TEM) and dynamic light scattering (DLS) techniques were use to measurement size of the nanoparticles. Thermal response ofa novel nano-P (AN-c-PEG) hydrogel has been studied too. The glass transition temperature (Tg)and LCST measured by using DSC. The LCST of the Samples are 28-32° Ctemperature range. Swelling of hydrogels has been investigated with gravimetric method. The swelling rate of the samples decreased with increasing AN content.