Precisely Tailoring Bubble Morphology in Microchannel by Nanoparticles Self-assembly,Industrial & Engineering Chemistry Research

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Precisely Tailoring Bubble Morphology in Microchannel by Nanoparticles Self-assembly
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-02-22 , DOI: 10.1021/acs.iecr.8b06057
Yining Wu _{1,

2} , Ruoyu Wang _{1,

2} , Caili Dai _{1,

2} , Yan Xu ₃ , Tongtao Yue ₃ , Mingwei Zhao _{1,

2}

Affiliation

Precisely tailoring bubble morphology is always a long-standing great challenge. In this work, a facile and scalable method to generate nonspherical bubbles with long-term stability is proposed. Taking advantage of the electrostatic interaction between silica nanoparticles (SNPs) and cationic surfactants, the SNPs are decorated with surfactants and endowed with interfacial activity. Due to the rearrangement of surfactants, the decorated SNPs transform to a kind of Janus particles at the gas–liquid interface. By precisely manipulating the surface activity, packing density, and jamming of Janus SNPs at the bubble surface, four different shapes such as oblaten-like, bullet-like, tadpole-like, and worm-like bubble were obtained continuously in the microchannel. Herein, our method to generate bubbles with a prescribed shape poses opportunities for gas microreactor, cavity material, gas storage, and provide a platform to study the applicable scope of the Young–Laplace equation.

中文翻译：

纳米粒子自组装精确调整微通道中的气泡形态

精确定制气泡形态始终是一个长期的巨大挑战。在这项工作中，提出了一种简便且可扩展的方法来生成具有长期稳定性的非球形气泡。利用二氧化硅纳米颗粒（SNPs）和阳离子表面活性剂之间的静电相互作用，SNPs用表面活性剂修饰并具有界面活性。由于表面活性剂的重排，修饰后的SNP在气液界面处转变为Janus颗粒。通过精确地操纵气泡表面的表面活性，堆积密度和Janus SNP的堵塞，在微通道中连续获得了四个不同的形状，如扁圆形，子弹形，t形和蠕虫形气泡。在此处，

更新日期：2019-02-23

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