丙烯基类单体-壳聚糖共聚物水凝胶的辐射制备及性能研究

以壳聚糖、丙烯酰胺（AM）和二甲基二烯丙基氯化铵（DMDACC）为原料，N，N-亚甲基双丙烯酰胺（MBA）为交联剂，经^60Co γ-射线辐照，制备了丙烯基类单体一壳聚糖共聚物水凝胶，并研究了MBA的用量对丙烯基类单体一壳聚糖共聚物水凝胶吸水性能和保水性能的影响。结果表明，在吸收剂量为2kGy的条件下，MBA用量较低时，随着MBA用量的提高，水凝胶的平衡吸水率反而下降；而MBA用量较高时，水凝胶的平衡吸水率受MBA用量的影响较小；凝胶吸水率随着溶胀时间的延长而增加；水凝胶在溶胀初期的溶胀动力学可用non-Fickian扩散定律来描述：随着交联剂MBA用量的逐渐增加，水凝胶的初始失水率逐渐增大，而最大失水率逐渐下降。

Preparation of propenyl monomer-chitosan copolymer hydrogel by irridiation method and the study on its properties

Using 7-ray irradiation method, propenyl monomer-chitosan copolymer hydrogel was synthesized with chitosan, acrylamide （AM）, diallyl dimethyl ammonium chloride （DMDAAC）, and N, N-methylene-bis- acrylamide as crosslinking agent. The influence of crosslinker MBA amount on water absorption and retention properties of propenyl monomer-chitosan copolymer hydrogel was studied. The results showed when the amount of MBA was lower with the absorbed dose of 2 kGy, equilibrium water absorption decreased with the increasing MBAs; when the amount of MBA was higher, equilibrium water absorption was less affected by MBA; the swelling ratio of hydrogel increased with time; non-Fickian diffusion law could be used to describe swelling kinetics of hydrogel at initial stage; with the increase of the MBA amount, initial water loss rate of the hydrogel increased, however, the maximum loss rate decreased.