SHAN Ting CHEN Jie YANG Liming JIE Shaowei QIAN Qiang LIN Han FAN Jinchen CAO Fangqi. Radiation preparation and characterization of pH-sensitive hydrogel of acrylamide/β-cyclodextrin copolymer[J]. Nuclear techniques, 2008, (4): 284-287.
SHAN Ting CHEN Jie YANG Liming JIE Shaowei QIAN Qiang LIN Han FAN Jinchen CAO Fangqi. Radiation preparation and characterization of pH-sensitive hydrogel of acrylamide/β-cyclodextrin copolymer[J]. Nuclear techniques, 2008, (4): 284-287.DOI:
A β-cyclodextrin(β-CD)based monomer(MAH-β-CD)containing vinyl and carboxyl functional groups was synthesized by reaction of β-CD with maleic anhydride(MAH).By copolymerization of the monomer with acrylamide(AAm)
a novel hydrogel
poly(AAm-co-MAH-β-CD)with pH and ionic strength sensitivities plus molecular inclusion function
was obtained by irradiating the aqueous solution mixture of AAm and MAH-β-CD with electron beam.The effect of the feed ratio of components and irradiation dose on the swelling and deswelling properties of the hydrogel was systematically studied.Swelling ratio of the hydrogel was tested under different environment of pH and ionic strength.The results indicate that the copolymer hydrogels did not show any noticeable change in swelling at lower pH(pH<5).However
they showed an abrupt increase in swelling at pH 5~8 due to the ionization of carboxyl groups.
School of Radiation Medicine and Protection, Medical College of Soochow University, Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection