用有限元模拟方法研究阶层式多孔薄膜几何参数对水通量的影响  

Study of Influence of Geometric Parameters of Hierarchically Porous Membranes on Water Flux by Using Finite Element Simulation Method

作　　者：卢婉 杨永彪 丁明明 LU Wan;YANG Yongbiao;DING Mingming(School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou 510006,China;School of Chemistry and Chemical Engineering,Liaoning Normal University,Dalian 116029,Liaoning Province,China)

机构地区：[1]广东工业大学轻工化工学院,广州510006 [2]辽宁师范大学化学化工学院,辽宁大连116029

出　　处：《吉林大学学报（理学版）》2024年第3期721-727,共7页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:22373025).

摘　　要：通过系统改变阶层式多孔薄膜大孔和小孔的孔径及孔隙率等几何参数,用有限元模拟方法研究薄膜通量与相关几何参数之间线性或非线性的定量关系.模拟结果表明,在弯曲孔道基体中添加球形空穴形成阶层式多孔结构后,可使薄膜水通量提升约为原来的171%.对于弯曲孔道,单纯增加其数量可使水通量线性提升,单纯增大其孔径可使水通量以指数函数形式提升.对于球形空穴,单纯增加其数量或单纯增大其孔径,水通量均以指数函数形式提升.此外,球形空穴的水通量提升作用还依赖于它与弯曲孔道基体网格的相对尺寸,通过调节制备条件可提升分离膜材料的性能.By systematically changing the geometric parameters such as pore size and porosity of large and small pores in hierarchically porous membranes,we used finite element simulation method to study the linear or nonlinear quantitative relationships between membrane flux and related geometric parameters.The simulation results show that after addition spherical cavities to the curved channel matrix to form a hierarchical porous structure,the water flux of the film can be increased by about 171%of the original.For the curved channels,simply increasing their number can lead to a linear increase in water flux,and simply increasing their pore size can lead to an exponential function increase in water flux.For spherical cavities,simply increasing their number or simply increasing their pore size results in an exponential function increase in water flux.In addition,the water flux enhancement effect of spherical cavities also depends on their relative size with the matrix grid of curved channels.The performance of separation membrane materials can be improved by adjusting the preparation conditions.

关 键 词：阶层式多孔膜 膜通量 有限元模拟 

分 类 号：O484[理学—固体物理]