还原氧化石墨烯/聚丙烯酰胺水凝胶的制备及表征

Preparation and Characterization of rGO Polyacrylamide Hydrogel

摘要: 水凝胶是一种包含大量水分子与高分子的三维网络结构，可以应用于环境监测、生物医学等领域。为了克服传统水凝胶机械强度弱的缺点并合成导电性好的水凝胶。本文采用温和还原法制备了还原氧化石墨烯/聚丙烯酰胺复合水凝胶并对其进行表征，通过正交实验对水凝胶进行处方优化，并采用傅里叶变换红外光谱、扫描电镜等对水凝胶进行表征。分析结果表明：GO/PAM水凝胶体系中的GO被成功还原；rGO在水凝胶中分散均匀无聚集情况；还原后的水凝胶导电率从1.29 × 10⁻⁴增加至1.79 × 10⁻⁴；杨氏模量达到63 ± 2.68 kPa。合成的导电水凝胶为水污染和环境监测中的实际应用提供有价值的研究基础。

Abstract: Hydrogel is a three-dimensional network structure containing a large number of water molecules and polymers, which can be applied in environmental monitoring, biomedicine, and other fields. In order to overcome the weak mechanical strength of traditional hydrogels and synthesize hydrogels with good electrical conductivity. In this study, the rGO/polyacrylamide composite hydrogel was prepared and characterized by mild reduction method. The formulation of the hydrogel was optimized by orthogonal experiments, and the hydrogel was characterized by Fourier transform infrared spectroscopy and scanning electron microscopy. The analysis results showed that GO in the GO/PAM hydrogel system was successfully reduced. rGO was uniformly dispersed in the hydrogel without aggregation. The conductivity of the reduced hydrogel increased from 1.29 × 10⁻⁴ to 1.79 × 10⁻⁴. The Young’s modulus reached 63 ± 2.68 kPa. The synthesized conductive hydrogels provide a valuable research basis for practical applications in water pollution and environmental monitoring.