论文部分内容阅读
以聚二甲基硅氧烷(PDMS)材料为基底,采用光刻技术制备了微方柱状疏水表面,研究了垂直振动作用下,液滴在疏水表面的Wenzel-Cassie状态转变特性.研究表明,在某一振动频率下,随着振幅逐渐增大,不同体积液滴均能实现Wenzel-Cassie状态转变;当施加的振动频率接近某一体积液滴固有频率时,由于该液滴与振动平面发生共振,液滴发生浸润状态转变所需能量最小;该频率下其他体积液滴虽也可以实现浸润状态转变,但由于所施加振动频率偏离其固有频率,液滴发生浸润转变所需能量并非最小;振动频率偏离其固有频率越远,所需能量越大.结合表面物理化学和振动力学对该现象进行了理论分析.
The polydimethylsiloxane (PDMS) material was used as a substrate to prepare the microcolumn hydrophobic surface and the Wenzel-Cassie transition state of the droplets on the hydrophobic surface under the action of vertical vibration was studied. At a certain vibrational frequency, the Wenzel-Cassie state transition can be achieved with different volumetric droplets as the amplitude gradually increases. When the applied vibrational frequency is close to the natural frequency of a certain volume of droplets, since the droplet and the vibrational plane When resonance occurs, the energy required for the droplet to migrate to the infiltrated state is minimized. Although the other volume droplets at this frequency can also change the wetting state, the energy required for the droplet to undergo wetting transformation is not due to the frequency of the applied vibration deviating from its natural frequency The vibration frequency deviates from its natural frequency, the energy required is greater.The theory of surface physics and chemistry and vibration mechanics is analyzed theoretically.