【作者】 朱丽； 朱晓阳； 杨利军； 章维一；

【Author】 ZHU Li;ZHU Xiao-yang;YANG Li-jun;ZHANG Wei-yi;School of Mechanical Engineering,Nanjing University of Science and Technology;

【机构】 南京理工大学机械工程学院；

【摘要】 研究了基于微流体脉冲驱动喷射和玻璃微流体器件组合制作工艺制备多组分微胶囊的方法。通过对电磁铁致动器施加周期性电场,使与之固连的组合微喷嘴固壁产生周期性运动,实现不同流体的脉冲微流动与喷射。开展了壳流体海藻酸钠溶液的稳定喷射实验,得到了稳定驱动电压为6~15V,然后进行了微流体脉冲驱动喷射制备微胶囊的实验。以同轴型组合微喷嘴制得了玻璃微珠-橄榄油-海藻酸钠多层微胶囊,以Y型组合微喷嘴制得了双室微胶囊,利用Y-同轴型复合微喷嘴制得了多组分同时包覆的多室结构微胶囊。实验结果表明:微流体脉冲喷射技术制备的多组分微胶囊外表规则,多组分扩展了单组分胶囊的功能,多室结构可对被封装的核材料进行保护;其制作过程简单、无需高压电场、能包覆固态和液态核材料。更多还原

【Abstract】 A method for multicomponent microcapsule molding was proposed by combination of pulse driving microfluid injection with glass micro fluid devices.The electromagnet acuator was exerted a periodical field,which allowed the solid wall of micro mozzle conneted to the acuator to move periodically and the pulse micro fluidic and jetting of different flows were implemented.Firstly,the influences of the system parameters on the stable micro injection of shell material sodium alginate solution were researched.The driving voltage amplitude range is from 6Vto 15 V.Then the multicomponent microcapsule molding experiments were carried out.The glass bead and olive oil were multilayered and encapsulated by using coaxial type micro nozzle,the "θ"structured compartment microcapsule were encapsulated by using the Y type micro nozzle,and the two core materials and compartment microcapsule was encapsulated by using the Y-coaxial type micro nozzle.Experimental results indicate that the multicomponent microcapsules molded by pulse driving microfluids injection have regular ap-pearance,the multiple components can expand the function of single component capsule,and the multi compartments can protect each of the core ingredients from each other and from the environment.The technology has advantages over simple process,no high voltage electric field and the multi core materials including powder and liquid can be encapsulated.更多还原