双连续相微乳液制备连续孔聚丙烯酰胺凝胶  

Preparation and properties of continuous porous polyacrylamide gels from bicontinuous microemulsions

作　　者：周应学[1] 范晓东[1] 孙乐[1] 陈卫星[1] 于德海[1] 

机构地区：[1]西北工业大学理学院应用化学系,陕西西安710129

出　　处：《功能材料》2011年第5期812-815,819,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(20674060)

摘　　要：以十二烷基硫酸钠/甲苯/2-丁醇/盐水双连续微乳液相为模板,制备了3种组分双连续有机凝胶,水凝胶和有机/水杂化凝胶。12-羟基硬脂酸(12-HA)为有机凝胶剂。它们固定了水和油并使水和油微相共存于凝胶中。以静态光散射(SLS)测定了各双连续相微乳液的粒径,结果显示值在8～80nm。扫描电子显微镜观察了各凝胶的形貌,表明凝胶为连续孔网络结构。差示扫描量热(DSC)和热重(TG)研究了凝胶的热性能,由于双连续结构3种凝胶显示多个吸热和失重峰。与纯的闭孔聚丙烯酰胺相比,双连续水凝胶的溶胀率明显降低,饱和溶胀所需时间大大减小。Organogel,hydrogel and an organo/hydro hybrid gel were prepared by bicontinuous microemulsion（BME） template of sodium dodecyl sulfate（SDS）/toluene/ 2-butanol/saline.12-Hydroxystearic acid（12-HA） was organogeltor.These gels were self-supported,and aqueous and oil microphases bicontinuously coexisted and were immobilized in the gels.Particles dimenters and polydispersion of BME solution were detected by static light scattering（SLS） and dimenter was 8-800nm.Morphology constructure of gels were observated by scanning electrinic microscopy（SEM） and was continuous porous networks.Several peaks were measured of gels tested by differential scanning calorimetry（DSC） and thermogravity（TG） for thermal properties due to bicontinuous microemulsion composites.Compared to pure cross-linked polyacrylamide,the swelling ratio and swelling saturated times of BME hydrogel were instrictly decreased.

关 键 词：双连续微乳液 凝胶聚合 12-羟基硬脂酸 水凝胶 聚丙烯酰胺 

分 类 号：O648.3[理学—物理化学] O631.2[理学—化学]