TY - JOUR
T1 - Synthesis of crosslinked networks of Gum ghatti with different vinyl monomer mixtures and effect of ionic strength of various cations on its swelling behavior
AU - Kaith, Balbir Singh
AU - Jindal, Rajeev
AU - Mittal, Hemant
AU - Kumar, Kiran
PY - 2012/2/1
Y1 - 2012/2/1
N2 - A series of pH, temperature, and electrical stimulus sensitive novel hydrogels of Gum ghatti (Gg) with vinyl monomer mixtures of acrylamide (AAm) with acrylic acid (AA), acrylonitrile (AN), and methacrylic acid (MAA) using potassium persulphate-ascorbic acid redox pair as an initiator and N,N-methylene-bis-acrylamide (MBA) as a crosslinker was synthesized using a free radical polymerization process. Initially, different reaction parameters for the graft copolymerization and crosslinking of Gum ghatti with AAm and MBA were optimized. Afterwards, optimization of AA, AN, and MAA in combination with preoptimized AAm was carried out. Synthesized products were characterized by FT-IR, SEM, XRD, and TGA/DTA/DTG. Swelling behavior of hydrogels was investigated in deionized water as a function of time, temperature, and pH of swelling medium. Moreover, hydrogels have been found to exhibit cationic charge-dependent swelling in different salt solutions of Na+, Ba 2+, Fe3+, and Sn4+. The order of swelling was found to be Na+>Ba2+>Fe3+>Sn 4+.
AB - A series of pH, temperature, and electrical stimulus sensitive novel hydrogels of Gum ghatti (Gg) with vinyl monomer mixtures of acrylamide (AAm) with acrylic acid (AA), acrylonitrile (AN), and methacrylic acid (MAA) using potassium persulphate-ascorbic acid redox pair as an initiator and N,N-methylene-bis-acrylamide (MBA) as a crosslinker was synthesized using a free radical polymerization process. Initially, different reaction parameters for the graft copolymerization and crosslinking of Gum ghatti with AAm and MBA were optimized. Afterwards, optimization of AA, AN, and MAA in combination with preoptimized AAm was carried out. Synthesized products were characterized by FT-IR, SEM, XRD, and TGA/DTA/DTG. Swelling behavior of hydrogels was investigated in deionized water as a function of time, temperature, and pH of swelling medium. Moreover, hydrogels have been found to exhibit cationic charge-dependent swelling in different salt solutions of Na+, Ba 2+, Fe3+, and Sn4+. The order of swelling was found to be Na+>Ba2+>Fe3+>Sn 4+.
KW - crosslinking
KW - graft copolymerization
KW - Gum ghatti
KW - hydrogel
KW - swelling
UR - http://www.scopus.com/inward/record.url?scp=84856877323&partnerID=8YFLogxK
U2 - 10.1080/00914037.2011.574655
DO - 10.1080/00914037.2011.574655
M3 - Article
AN - SCOPUS:84856877323
SN - 0091-4037
VL - 61
SP - 99
EP - 115
JO - International Journal of Polymeric Materials and Polymeric Biomaterials
JF - International Journal of Polymeric Materials and Polymeric Biomaterials
IS - 2
ER -