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通过两步聚合得到既具有良好力学强度又具有优良导电性能的聚丙烯酰胺-g-聚苯胺复合水凝胶.首先,丙烯酰胺和N-(4-氨苯基)丙烯酰胺在钴源γ-射线辐照下共聚形成聚丙烯酰胺水凝胶;然后,苯胺在具有微观多孔结构的聚丙烯酰胺凝胶中吸附,在过硫酸铵的作用下与凝胶的苯胺侧基发生接枝聚合,得到聚丙烯酰胺-g-聚苯胺水凝胶,并形成聚苯胺连续导电通道.改变辐照时间和辐照剂量率,所获得的聚丙烯酰胺水凝胶的凝胶分数随着辐照剂量的增加逐渐增大,而溶胀率随着辐照剂量的增加呈先增后减的趋势,表明凝胶的交联程度随辐照剂量呈规律性变化;辐照交联聚合的单体浓度对凝胶的性能,如溶胀率、微观结构和机械性能等也有影响.酸掺杂后,聚丙烯酰胺-g-聚苯胺复合凝胶的电导率达到9 S/m.
Polyacrylamide-g-polyaniline composite hydrogel with good mechanical strength and excellent conductivity was obtained by two-step polymerization.Firstly, acrylamide and N- (4-aminophenyl) Ray irradiation to form a polyacrylamide hydrogel; then, aniline is adsorbed on a polyacrylamide gel having a microscopic porous structure, and grafted with an aniline side group of the gel under the action of ammonium persulfate to obtain Polyacrylamide-g-polyaniline hydrogel, and the formation of polyaniline continuous conductive channels.Changing the irradiation time and irradiation dose rate, the gel fraction of polyacrylamide hydrogel obtained as the radiation dose increases And the swelling rate increased first and then decreased with the increase of irradiation dose, indicating that the degree of crosslinking of the gel changed regularly with the irradiation dose; the monomer concentration of irradiation crosslinking polymerization had no effect on the gel Such as swelling rate, microstructure and mechanical properties, etc. After acid doping, the conductivity of polyacrylamide-g-polyaniline composite gel reached 9 S / m.