集成式三相流脉动微混合芯片

doi:10.13229/j.cnki.jdxbgxb20170570

摘要/Abstract

摘要： 为适用于较复杂的混合体系和实现芯片的集成化,基于压电驱动技术提出一种集成式三相流脉动微混合芯片。以混合度作为微混合效果的评定指标,对其进行仿真优化分析,优选出微混合芯片的结构参数与工作参数。利用注模法与键合工艺制作出尺寸为100 mm×50 mm×5 mm的微混合芯片。利用银纳米粒子的液相合成对该芯片的混合性能进行实验验证。结果表明:当微混合芯片的混合流道宽度为0.4 mm、入口流道夹角为120°、频率为200 Hz、入口流量为3.5 mL/min时,利用该芯片可控合成了粒径约29 nm、产率较高、单分散性较好的银纳米粒子,证明该芯片具有良好的混合性能。

关键词: 流体传动与控制, 压电驱动, 三相流, 脉动微混合, 银纳米粒子

Abstract: To adapt to a more complex mixed system, an integrated three-phase flow pulsation Micro Mixing Chip (MMC) based on piezoelectric actuation technology was proposed. Using the mixing degree as the evaluation index of mixing effect, simulation and optimization analysis were carried out, and the structural parameters and working parameters of the MMC were optimized. A MMC with the size of 100 mm × 50 mm × 50 mm was fabricated by injection molding and bonding processes. In order to test the mixing performance of the chip, experiments of the liquid phase synthesis of silver nanoparticles were carried out. The results show that when the width and the entrance angle of the mixing channel of the MMC is 0.4mm and 120 degree respectively, the working frequency is 200 Hz, and the entrance flow-rate is 3.5 mL/min, silver nanoparticles with average diameter of 29 nm are synthesized by the controllable microfluidic chip, with high productivity, fine morphology and good monodispersity, which demonstrate that the MMC has good mixing performance.

Key words: fluid transmission and control, piezoelectric actuation, three-phase flow, pulsating mixing, silver nanoparticles

中图分类号:

TN384

刘国君, 马祥, 杨志刚, 王聪慧, 吴越, 王腾飞. 集成式三相流脉动微混合芯片[J]. 吉林大学学报(工学版), 2018, 48(4): 1063-1071.

LIU Guo-jun, MA Xiang, YANG Zhi-gang, WANG Cong-hui, WU Yue, WANG Teng-fei. Integrated pulsation micro mixing chip for three-phase flow[J]. 吉林大学学报(工学版), 2018, 48(4): 1063-1071.

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