挤出微压印熔体充模流动可视化实验  

Visualization Experiment on Filling Flow of Extrusion Micro Hot Embossing Process

作　　者：孟利民 吴大鸣[1] 何小祥[3] 刘颖[1] 

机构地区：[1]北京化工大学塑料机械及塑料工程研究所,北京100029 [2]安徽理工大学机械工程学院,安徽淮南232001 [3]高分子材料加工装备教育部工程研究中心,北京100029

出　　处：《塑料》2014年第5期27-30,7,共5页Plastics

基　　金：国家自然科学基金(51173015)

摘　　要：挤出微压印是高效、精确连续制备具有微结构制品的有效方法。基于Navier-Stokes方程建立挤出微压印充模过程速度模型。结合Navier滑移定律分析微尺度下挤出微压印充模过程填充流动壁面滑移问题。同时，设计微压印熔体充模流动可视化实验装置，以羧甲基纤维素（CMC，carboxyl methyl cellulose），简称为实验材料，选用直径0．1-0．5mm的毛细管作为微流道，对挤出微压印充模流动进行实验研究，并将速度实验值与理论计算值相比较，验证微尺度下壁面滑移对压印填充流动的影响。The main method to fabricate continuously polymeric microstructures involved the extrusion micro hot embossing process with high efficiency and low-cost. A velocity model for the fitting flow of extrusion micro hot embossing process was built based on the Navier-Stokes equation. The wall-slip behavior during the fitting flow at a micro scale was analyzed according to the Navier slip law. Meanwhile, a visualization device was designed to simulate the extrusion micro hot embossing process. Carboxyl methyl cellulose （CMC） solution was used as material, and capillaries were chosen as micro channels where the inner diameter was in the range of 0.1 to 0.5 mm. Comparative experiments were carried out to investigate the filling flow. The experimental values of velocity were compared with the theoretical ones for exploring the effect of wall-slip on the filling flow at the micro scale.

关 键 词：挤出微压印 充模流动 微尺度效应 壁面滑移 CMC 

分 类 号：TQ175.662[化学工程—硅酸盐工业]