第23卷第12期 2015年12月
文章编号
1004-924X(2015)12334307
光学精密工程
Optics and Precision Engineering
Vol.23No.12
Dec.2015
静磁场对固液界面表面电荷性质的影响
景大雷"，潘昀路2*
（1.上海理工大学机械工程学院，上海200093；
2.哈尔滨工业大学机电工程学院，黑龙江哈尔滨150001）
摘要：考虑磁场对圈液界面表面电荷性质的影响与微纳流体系统的流体阻力相关，本文采用原子力显微镜（AFM)研究了静磁场对去离子水黏度以及高硅玻璃-去离子水界面表面电荷性质的影响，并分析了静磁场对去离子水性质影响的机理。研究结果表明，将去离子水静置于磁场强度为0～0.6T的静磁场下30min时，去离子水的黏度随磁场强度的增加而减小，而高硼硅玻璃-磁化水界面的表面电荷密度随磁场强度的增加而增加；静磁场对去高子水性质影响的机理是磁场引起的去离子水内氢键以及氢氧键的断裂。研究结果同时表明，磁场可以有效地改变固液界面的表面电荷性质。本文的研究结果为利用磁场有效地控制微纳流体系统的流体阻力提供了可能。
关键
调：微纳流体系统；流体阻力；磁场；固液界面；表面电荷
中图分类号：0351.2;0441.4
文献标识码：A
doi10.3788/OPE,20152312.3343
Effect of static magnetic field on surface charges
of solid-liquidinterfaces JINGDa-lei',PANYun-lu
(1.School ofMechanical Engineering,University ofShanghaifor
Scienceand Technology,Shanghai200093,China;
2.School ofMechatronics Engineering,HarbinInstitute ofTechnology,Harbin15000l,China)
*Correspondingauthor,E-mail:yunlupan@hit.edu.cn
Abstract: As the effect of a static magnetic field on the surface charge of solid-liquid interfaces is relat-ed to the fluid drag of micro/nano fluidic systems, this paper researches the effects of the static mag netic field on the viscosity of deionized (DI) water and the surface charges of borosilicate glass-DI wa ter interfaces and analyzes the effect mechanism of static magnetic field on the properties of DI water. The experimental results show that when the DI water is exposed in the static magnetic field with a magnetic field intensity of o T to O. 6 T for 30 min, the viscosity of DI water decreases with increasing magnetic field intensity and the surface charge density of borosilicate glass-DI water interface increases with the increasing magnetic intensity. The effect mechanisms of static magnetic field on the proper-ties of DI water are the breaking of hydrogen bond and O-H bond caused by the magnetic field. The research indicates that the static magnetic field changes the surface charge properties of solid-liquid in-
收稿日期：2015-05-26；修订日期：2015-07-26.
基金项目：国家自然科学基金青年基金资助项目（No.51505292，No51505108）