| 吴杨,王晓龙.化学通报,2014,77(6):510-514. |
| 聚丙烯酸/氧化石墨烯复合水凝胶摩擦学性能研究 |
| Tribological property of polyacrylic acid-graphene oxide composite hydrogel |
| 投稿时间：2014-01-13 修订日期：2014-01-23 |
| DOI： |
| 中文关键词: 氧化石墨烯 水凝胶 摩擦系数 调控 |
| 英文关键词:Graphene oxide Hydrogel Frictional coefficient Regulation |
| 基金项目:国家杰出青年科学基金;国家重点基础研究发展计划（973计划）;中国科学院重点资助项目 |
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| 中文摘要: |
| 通过自由基聚合制备了聚丙烯酸（PAA）水凝胶。在聚丙烯酸水凝胶体系中掺入氧化石墨烯（GO），改善其机械强度。用往复摩擦试验机, 在面-面接触的条件下考察了在不同载荷，速度，接触面积下，摩擦力和摩擦系数变化；实验结果表明聚丙烯酸水凝胶摩擦行为不遵从传统的固体摩擦定律（Amonton’s law）。并通过羧酸根与铜(Ⅱ)离子络合和去络合作用实现摩擦系数从极低到较高的可逆调节。 |
| 英文摘要: |
| The poly (acrylic acid) (PAA) hydrogel was prepared through free radical polymerization. Graphene oxide sheets (GO) were added into the hydrogel system to enhance the mechanical strength. The tribological properties of polyacrylic acid-graphene oxide composite hydrogel were studied by a friction tester. Under the face-to-face sliding contact condition, the different test influencing factors including load, velocity, and contact area were investigated systematically. The experiment results proved that the tribological behavior of the composite hydrogel did not comply with Amonton’s law, the classic law of friction of solid sliding pairs. The frictional coefficients of the composite hydrogel were switched between very low and high value by the complexation and decomplexation with the Cu(II). |
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