明胶/石墨烯导电水凝胶的制备及传感应用

Preparation and sensing application of gelatin/graphene conductive hydrogels

摘要:

本文以明胶(Gel)和石墨烯(GR)为原料,十二烷基硫酸钠(SDS)为表面活性剂,甘油和水作二元溶剂,制备了明胶/石墨烯(Gel/GR)导电水凝胶,研究了石墨烯含量对导电水凝胶力学性能和导电性能的影响。结果显示,Gel/GR导电水凝胶的拉伸强度达114.63KPa,伸长率达157.85%,导电率可达6.68*10_-3^S/m,比纯Gel水凝胶导电率提高了2500倍,并具有良好的抗冻性和粘附性。此外,通过稳定且可重复的电信号检测人体活动(例如手指弯曲、手腕弯曲),表明其在个人健康监测中的潜在应用。

Abstract:

In this paper, using gelatin (Gel) and graphene (GR) as raw materials, sodium dodecyl sulfate (SDS) as surfactant, glycerol and water as binary solvent, the Gel/GR conducting hydrogel was prepared. The effects of the content of graphene on the mechanical and electrical properties of the conducting hydrogel were studied. The results showed that Gel/GR conducting hydrogel had a tensile strength of 114.63KPa, a elongation of 157.85%, and a conductivity of 6.68*10-3S/m, which was 2500 times higher than that of pure Gel hydrogel, and had good freezing resistance and adhesion. In addition, the detection of human activity (e.g. finger bending, wrist bending) by stable and repeatable electrical signals suggests potential applications for personal health monitoring.