Colloid and Interface Science Communications ( IF 4.5 ) Pub Date : 2020-05-12 , DOI: 10.1016/j.colcom.2020.100266 Hong Yu , Likun Gong , Zhiyuan Qu , Peng Hao , Jianlin Liu , Liyun Fu
We report that the wettability of artificial sandstones can be significantly improved by an innovative pulsed microwave plasma jet (PMPJ). The roughness of the sandstone surface is enhanced after the PMPJ treatment, but according to the Wenzel model, it has the negative effect to make a hydrophobic surface become hydrophilic. The molecular dynamics (MD) simulation shows that the alteration of the surface chemical property has a positive effect on the hydrophilicity enhancement, whose influence can compensate for that of the roughness. It is these two factors together that make the hydrophobicity of the sandstone become weaker after the PMPJ treatment. These findings hold great potentials in petroleum engineering, which may provide some inspirations for the enhancement of oil/gas recovery by the plasma technology.
中文翻译:
脉冲微波等离子体射流增强疏水性人造砂岩的润湿性
我们报告说,通过创新的脉冲微波等离子体喷射(PMPJ),人造砂岩的润湿性可以得到显着改善。经过PMPJ处理后,砂岩表面的粗糙度提高了,但是根据Wenzel模型,它对使疏水性表面变为亲水性具有负面影响。分子动力学(MD)模拟表明,表面化学性质的改变对亲水性的提高具有积极的影响,其影响可以补偿粗糙度的影响。正是这两个因素使PMPJ处理后砂岩的疏水性变弱。这些发现在石油工程中具有巨大的潜力,这可能为通过等离子体技术提高油气采收率提供一些启示。