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A micro-needle induced strategy for preparation of monodisperse liquid metal droplets in glass capillary microfluidics
Hu QM; Ren YK; Zheng X(郑旭); Hou LK; Jiang TY; Liu WY; Tao Y; Jiang HY
Conference NameInternational Conference of Microfluidics, Nanofluidics and Lab-on-a-Chip
Conference Date2018
Conference PlaceBeijing, PEOPLES R CHINA

Monodisperse micro-sized liquid metal droplets have received considerable attention for developing flexible electronics, microfluidics actuators and reconfigurable devices. Herein we report an innovative and efficient strategy for large-scale preparation of Galinstan liquid metal microdroplets with controllable sizes using a micro-needle induced glass capillary microfluidic device. By inserting a stainless steel micro-needle into the inner liquid metal phase in the glass capillary, the hydrodynamic instability of the liquid metal stream is significantly suppressed to guarantee steady fluid flow before the liquid metal is pinched off by the outer phase flow, giving rise to a stable generation of monodisperse liquid metal microdroplets. The microdroplet size dependence on the flow ratio of the continuous and dispersed-phase is investigated experimentally. A theoretical framework based on the Plateau-Rayleigh instability is proposed to explain the advantage of the micro-needle induced strategy. This strategy has great potential for the generation of high interfacial tension liquid metal emulsions.

KeywordMicro-needle induced Liquid metal Glass capillary microfluidic Hydrodynamic instability Plateau-Rayleigh instability
WOS IDWOS:000454930000002
Funding OrganizationNational Natural Science Foundation of China [11672095, 11802078, 11702035, 11572335] ; Foundation for Innovative Research Groups of the National Natural Science Foundation of China [51521003] ; CAS Key Research Program of Frontier Sciences [QYZDB-SSW-JSC036] ; CAS Strategic Priority Research Program [XDB22040403] ; University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province [UNPYSCT-2018104]
Indexed ByCPCI-S ; EI
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type会议论文
Affiliation1.{Hu, Qingming、Ren, Yukun、Hou, Likai、Jiang, Tianyi、Liu, Weiyu、Tao, Ye、Jiang, Hongyuan} Harbin Inst Technol, Sch Mechatron Engn, West Da Zhi St 92, Harbin 150001, Heilongjiang, Peoples R China
2.{Hu, Qingming} Qiqihar Univ, Sch Mechatron Engn, Wenhua St 42, Qiqihar 161006, Heilongjiang, Peoples R China
3.{Zheng, Xu} Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China
4.{Liu, Weiyu} Changan Univ, Sch Elect & Control Engn, Middle Sect Naner Huan Rd, Xian 710064, Shaanxi, Peoples R China
Recommended Citation
GB/T 7714
Hu QM,Ren YK,Zheng X,et al. A micro-needle induced strategy for preparation of monodisperse liquid metal droplets in glass capillary microfluidics[C]MICROFLUIDICS AND NANOFLUIDICS,2019:1-9.
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