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首页> 外文期刊>Journal of Applied Polymer Science >Hydrophobic recovery of femtosecond laser processed silicone rubber insulator surfaces
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Hydrophobic recovery of femtosecond laser processed silicone rubber insulator surfaces

机译：飞秒激光加工硅橡胶绝缘表面的疏水恢复

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摘要

This article demonstrates the loss and recovery in hydrophobicity of silicone rubber insulator surface processed by a femtosecond laser. The two stages of the wettability conversion were investigated. First, a rough micro/nano structure was formed on the original hydrophobic sample surface processed by the femtosecond laser, and the water contact angle on the surface was reduced from similar to 110 degrees to a minimum of similar to 35 degrees. This hydrophilicity loss was due to the increase in the hydrophilic -OH groups and the reduction of the hydrophobic -CH3 groups on the surfaces. Second, the roughened samples were stored in a natural ambient environment. Over a certain storage time, the surface hydrophobicity recovered gradually and evolved into a superhydrophobic state. It was found that the migration of low molecular weight cycle and/or linear siloxane oligomers resulted in the recovery of the hydrophobicity property. Coupled with the increase of surface roughness caused by laser irradiation, the further evolution of the hydrophobicity was promoted. Moreover, the higher temperature accelerates the recovery of the surface hydrophobicity. The research on the conversion mechanism of the wettability on the silicone rubber insulator surface processed by femtosecond laser is of great significance for improving its reliability in practical applications.
机译：本文阐述了硅橡胶绝缘体表面经飞秒激光处理后疏水性的损失和恢复。研究了润湿性转化的两个阶段。首先，在飞秒激光处理的原始疏水样品表面上形成粗糙的微/纳米结构，表面上的水接触角从近似110度减小到最小35度。这种亲水性损失是由于表面上亲水-OH基团的增加和疏水-CH3基团的减少。其次，将粗糙样品储存在自然环境中。在一定的储存时间内，表面疏水性逐渐恢复，并演化为超疏水状态。研究发现，低分子量环和/或线性硅氧烷低聚物的迁移导致疏水性的恢复。再加上激光辐照引起的表面粗糙度的增加，促进了疏水性的进一步演化。此外，较高的温度加速了表面疏水性的恢复。研究飞秒激光加工硅橡胶绝缘体表面润湿性的转换机理，对提高其实际应用的可靠性具有重要意义。

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