高弹性双网络水凝胶的制备及其性能研究  

Study on preparation and properties of highly elastic dual-network hydrogels

作　　者：樊凯奇[1] 贾彩敬 赵帅 岳凡 韩光鲁 王利霞[1] 尹志刚[1] 宋健[2] 

机构地区：[1]郑州轻工业学院材料与化学工程学院,河南郑州450001 [2]天津大学化工学院,天津300072

出　　处：《轻工学报》2017年第6期35-42,共8页Journal of Light Industry

基　　金：国家自然科学基金项目(21276188;21606211);河南省科技攻关项目(152102210358);河南省高等学校重点科研项目(16A530010);郑州轻工业学院科研基金项目(2015XJJZ032);郑州轻工业学院博士基金项目(2014BSJJ061)

摘　　要：以丙烯酸和琼脂为主要原料、Fe^(2+)/过硫酸铵为氧化/还原引发体系,制备具有高弹性的双网络水凝胶.通过研究丙烯酸和Fe^(2+)含量对水凝胶性能的影响,得出适宜的工艺条件为琼脂溶液质量浓度1%,丙烯酸质量分数30%,过硫酸铵质量分数1.5%,N,N'-亚甲基双丙烯酰胺质量分数0.3%,硫酸亚铁质量分数0.050%.对该条件下制备的水凝胶的力学性能进行分析测试发现,水凝胶的断裂拉伸率可达225%,抗压能力可达4 MPa,具有良好的拉伸和压缩性能.利用SEM,IR对该水凝胶进行微观形貌分析和结构表征发现,水凝胶的微观形貌具有纤维网络结构,纤维直径约为100 nm,琼脂与聚丙烯酸之间存在分子间氢键作用,Fe^(3+)与聚丙烯酸分子中的羧酸基因发生了金属络合作用.Dual-network hydrogels with high elasticity were prepared by oxidation/reduction( Fe^(2+)/ammonium persulfate) initiation system using acrylic acid and agar as the main raw materials. The optimum conditions were obtained as follows: agar mass concentration was 1%,masacrylic acid concentration was 30%( mass fraction),ammonium persulfate concentration was 1. 5%( mass fraction),N,N'-Methylenebisacrylamide concentration was 0. 3%( mass fraction),and ferrous sulfate concentration was 0. 050%( mass fraction). Through the analysis of the mechanical properties of the gel,it was found that the tensile elongation of the gel was 225%and the compressive capacity was 4 MPa,exhibiting good stretch and compression performance. The microstructure of the hydrogel were analyzed by IR using SEM. The results showed that the hydrogel has a fiber network structure with a fiber diameter of about 100 nm,there was intermolecular hydrogen bonding between agar and polyacrylic acid and the metal complexation between Fe^(3+) and polyacrylic acid molecules.

关 键 词：双网络水凝胶 氧化/还原引发 丙婦酸 高弹性凝胶 

分 类 号：TS03[轻工技术与工程]