IJSER Home >> Journal >> IJSER
International Journal of Scientific and Engineering Research
ISSN Online 2229-5518
ISSN Print: 2229-5518 4    
Website: http://www.ijser.org
scirp IJSER >> Volume 3,Issue 4,April 2012
Stimuli Sensitive Interpenetrating Network[
Full Text(PDF, )  PP.138-143  
Pham Trong Binh and Hsu, Hao-Chun and Zhao Zhenyu
Dye Absorption, Hydrogels, Interpenetrating Network, Nanoparticles, Polymers, Stimuli Sensitive, Swelling Synthetic Chemistry
Hydrogels are three-dimensional, cross-linked polymer networks that can absorb a large amount of water or solvent without dissolution. Due to their high absorbency, soft consistency and other properties, such materials can be used in medical industries to produce artificial organs, contact lenses, dressing for wound treatment and drug transporting devices. In this research poly(N-Vinylcaprolactam) (PVCL) hydrogels were synthesized with different cross-linkers. It was found that cross-linkers affected the stability of the hydrogel and those with high hydrophilicity enhanced its swelling capacity. Our experiments showed that ethylene glycol dimethylacrylate (EGDMA) was the ideal cross-linker. Hydrogels of an interpenetrating polymer network (IPN) composed of the thermo-sensitive PVCL and pH-sensitive poly(N-acryloyl-N'-ethylpiperazine) (PAcrNEP) were prepared via sequential polymerization. They were characterized for their thermo and pH-responsive behaviour by time dependence, equilibrium and oscillatory swelling studies. The results showed that these IPN successfully exhibited a combined pH and temperature-sensitivity at a temperature range of 20-35oC and a pH range of 3-6. This is a milestone in the study of hydrogels because most of them focused mainly on gels sensitive to basic medium only. The network also exhibited superior swelling capacity compared to pure PVCL even at high pH. Oscillatory swelling study showed that the IPN was able to respond to pH pulses quickly and reversibly. Dye absorption studies showed that IPN is a potential purifying agent. It was also found that the IPN is a good substrate for growing nanoparticle. Further research may include permeation studies of the IPN to test its ability for drug delivery
[1] Xiaohu Xia, B.E., Fabrication and light scattering study of multi-responsive nanostructured hydrogels and water soluble polymers, University of North Texas, 2003

[2] Zbigniew Ruszczak, Robert A Schwartz, Ewa Joss-Wichman, Surgical Dressings, Medscape Reference (2011)

[3] Sangphil Park, P.S. Keshava Murthy, Saemi Park, Y. Murali Mohan, Won-Gun Koh, Preparation of silver nanoparticle-containing semiinterpenetrating network hydrogels composed of pluronic and Preparation of silver nanoparticle-containing semiinterpenetrating network hydrogels composed of pluronic and pol (acrylamide) with antibacterial property, Journal of Industrial and Engineering Chemistry (2011) 293-297

[4] S.J. Allen, B. Koumanova, Decolourisation of water/wastewater using adsorption (review), Journal of the University of Chemical Technology and Metallurgy 40-3 (2005) 175-192

[5] Y. Murali Mohan, Kurt E. Geckeler, Polyampholytic hydrogels: Poly (Nisopropylacrylamide)-based stimuli responsive networks with Poly (ethyleneimine), Reactive and Functional Polymers 67 (2007) 144-155

[6] Jing Zhang, Nicholas A. Peppas, Synthesis and Characterization of pH- and TemperatureSensitive Poly (methacrylic)/Poly (Nisopropylacrylamide) Interpenetrating Polymeric Networks, Macromolecules 33 (2000) 102-107

[7] G. Roshan Deen, Swelling Behavior and MetalIon Uptake Capacity of pH-Responsive Hydrogels of Poly (N-acryloyl-N’-ethylpiperazine), Journal of Dispersion Science and Technology 31 (2010) 1673- 1678

[8] Volodymyr B. Boyko, N-Vinylcaprolactam based bulk and microgels: synthesis, structural formation and characterization by dynamic light scattering, Doctoral dissertation, Dresden University of Technology (2004)

Untitled Page