Swelling behavior of acrylic acid hydrogels prepared by γ-radiation crosslinking of polyacrylic acid in aqueous solution
Swelling behavior of acrylic acid hydrogels prepared by γ-radiation crosslinking of polyacrylic acid in aqueous solution
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DOI：
10.1016/s0014-3057(00)00044-6
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发表时间：
2000-12-01
影响因子：
6
通讯作者：
Nozari, S
中科院分区：
文献类型：
--
作者：
Jabbari, E;Nozari, S
研究了聚丙烯酸辐射交联合成的阴离子丙烯酸聚电解质水凝胶在水溶液中的溶胀行为。采用两步法合成了交联聚丙烯酸(PAA)水凝胶。首先，以丙烯酸为原料，在苯中通过自由基沉聚法合成了未交联型PAA。第二步，将PAA溶解在水溶液中，然后用伽马辐射进行交联。研究了水溶液中PAA的浓度、辐射剂量和溶胀介质的pH值对凝胶溶胀行为的影响。在pH为4的缓冲溶液中，当照射剂量为5~25kGy时，溶胀度为30~300，为Fickian肿胀。另一方面，在pH为7的缓冲溶液中，根据辐射剂量的不同，溶胀度从80到500不等，并且溶胀是非费克的。(C)2000爱思唯尔科学有限公司。保留所有权利。
Swelling behavior of anionic acrylic acid polyelectrolyte hydrogel synthesized by gamma -radiation crosslinking of polyacrylic acid in aqueous solution was investigated. Cross-linked polyacrylic acid (PAA) hydrogel was synthesized using a two-step method. First, uncrosslinked PAA was synthesized by free-radical precipitation polymerization of acrylic acid in benzene. In the second step, PAA was dissolved in aqueous solution, and it was crosslinked with gamma -irradiation. The swelling behavior of the gels was studied as a function of the concentration of PAA in aqueous solution during gamma -irradiation, radiation dose, and pH of the swelling medium. In a buffered solution of pH 4, the degree of swelling ranged from 30 to 300 for irradiation doses ranging from 5 to 25 kGy, and the swelling was Fickian. On the other hand, in a buffered solution of pH 7 the degree of swelling ranged from 80 to 500 depending on the irradiation dose and the swelling was non-Fickian. (C) 2000 Elsevier Science Ltd. All rights reserved.