芯动时刻——基于微流控芯片的科普实验方案

Chip Moving Moment:Popular Science Experiment Scheme Based on Microfluidic Chip

依托微流控芯片高效、低耗、微尺度等优势,在微通道体系中设计演示酸碱中和、配位、氧化还原等经典实验。通过微尺度下的多相层流、界面反应和径向扩散等效应,建立以界面扩散为主导的演示实验,全过程以慢镜头的谱带方式展现出来,令反应直观易懂,该实验操作简单,并兼具多学科知识交叉。在本设计教学应用中,针对高中生、本科生和专科生知识背景差异,可在普通实验条件下分级进行,对不同层次的学生进行针对性训练,实验操作难度低、试剂用量少(数毫升)、时间短(数分钟)、场地小,兼顾绿色与安全,适合在各本专科院校及中学的实验教学中普及开展。

In this paper,we designed a series of microfluidic chip systems to demonstrate classical experiments such as acid-base neutralization,coordination,redox reaction,because the microfluidic chips pose the advantages of high efficiency,low consumption and microscale analysis.Through the effects of laminar flow,interface reaction and radial diffusion in microscale,the demonstration experiment induced by interface diffusion was established.And the whole process was shown in the way of slow-motion band.It can make the reaction easy to operate,and demonstrate the intersection of multi-disciplinary knowledge.During the teaching process among senior high school students,undergraduates and junior college students with different knowledge background,we can carry out various training plans for target students at different levels under ordinary experimental conditions.The experimental operation is easy for manipulation,the amount of reagent is less(several milliliters),the time is short(a few minutes),and the space is small.It also exhibits green and safety features,so is suitable to be widely carried out in the experimental teaching in colleges and middle schools.