基于温度原位监测的微反应器在HNS微流道制备过程中的应用  

Application of Temperature In-situ Monitoring Based Microreactor in HNS Microfluidic Preparation Process

作　　者：黄健[1,2] 时育坤 和欣 张松 韩瑞山 周继明 张方 吴梦希[1,2] 刘军山 HUANG Jian;SHI Yu-kun;HE Xin;ZHANG Song;HAN Rui-shan;ZHOU Ji-ming;ZHANG Fang;WU Meng-xi;LIU Jun-shan(State Key Laboratory of High-performance Precision Manufacturing,Dalian University of Technology,Dalian Liaoning 116024,China;Key Laboratory for Micro/Nano Technology and System of Liaoning Province,School of Mechanical Engineering,Dalian University of Technology,Dalian Liaoning 116024,China;State Key Laboratory of Transient Chemical Effects and Control,Shaanxi Applied Physics-Chemistry Research Institute,Xi′an 710061,China)

机构地区：[1]大连理工大学高性能精密制造全国重点实验室,辽宁大连116024 [2]大连理工大学辽宁省微纳米技术及系统重点实验室,辽宁大连116024 [3]陕西应用物理化学研究所瞬态化学效应与控制全国重点实验室,陕西西安710061

出　　处：《火炸药学报》2024年第6期559-565,I0005,共8页Chinese Journal of Explosives & Propellants

基　　金：国家重点研发计划青年科学家项目(No.2022YFB3204600);大连理工大学医工交叉联合基金(No.DUT23YG215);大连理工大学科技领军人才团队项目(No.DUT22LAB504)。

摘　　要：针对含能材料微流道制备过程中缺乏温度原位监测手段的问题,提出一种集成薄膜温度传感器的微反应器系统;微反应器由包含薄膜温度传感器的玻璃基片与包含微流道的硅基片键合组成;微流道的上游、中游、下游分别放置了3个温度传感器,以实现微反应过程中高空间分辨率的温度测量;基于该微反应器,搭建了六硝基茋(HNS)连续化微流道制备系统,实时监测了HNS微纳米化及球形化过程中的温度变化。结果表明,微反应器具有精度高、耐腐蚀、可观测的优点;HNS微纳米化是一个放热反应,流体最大温升为6.4℃,由于HNS的逐渐析出,流体中的固体含量增大,流速变慢,流体温度的分布发生变化;在HNS球形化过程中,两相流体的混合是一个放热过程,流体最大温升为2.3℃;微流道中游处的温度明显高于上游与下游,说明当液滴流动至中游时,HNS微球已经制备完成。In order to resolve the lack of temperature in-situ monitoring means during the microfluidic preparation of energy-containing materials,a microreactor system with an integrated thin-film temperature sensor is proposed.The microreactor consists of a glass substrate containing the thin-film temperature sensor bonded to a silicon substrate containing the microfluidic channel.Three temperature sensors are placed upstream,midstream,and downstream of the microfluidic channel to achieve high spatial resolution temperature measurement during the microreaction process.Based on this microreactor,a continuous microfluidic preparation system for hexanitrostilbene(HNS)is constructed,and the temperature changes during the micro-and nanosizing and sphericalisation of HNS are monitored in real time.The results show that the microreactor has the advantages of high precision,corrosion resistance and observability.HNS micro-and nanosizing is an exothermic reaction with a maximum fluid temperature rise of 6.4℃.Due to the gradual precipitation of HNS,the solid content in the fluid increases,the flow rate slows down,and the distribution of the fluid temperature changes.The mixing of two-phase fluids during the HNS spheronisation process is an exothermic process,with a maximum temperature rise of 2.3℃.The temperature at the midstream of the microfluidic channel is significantly higher than that at the upstream and downstream,and it is deduced that when the droplets flow to the midstream,the HNS microspheres have already been prepared.

关 键 词：物理化学 微反应器 薄膜温度传感器 实时温度监测 六硝基芪 HNS 微流控 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O64[理学—物理化学]