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Fabrication of a Composite Colloidal Particle with Unusual Janus Structures as a High-Performance Solid Emulsifier
发布时间:2013-4-23 点击次数:1097次

Fabrication of a Composite Colloidal Particle with Unusual Janus Structures as a High-Performance Solid Emulsifier

Xiaohui Meng, Yinyan Guan, Zhengdong Zhang, and Dong Qiu*

Langmuir, 2012, 28, 12472-12478.

 

Core-shell particles with crosslinked core and shell were used as seed particles to produce composite Janus particles. It was found that when the shell has distinctly higher crosslinking degree than the core, Janus particles with very unusual structures can be obtained. These particles have two parts, with one part embraced partially or entirely by another part, adjustable by parameters such as phase ratio or crosslinking degree. Based on experimental observations, a possible mechanism for the formation of such unusual Janus particles has been proposed. Janus particles with arms are used to emulsify water-toluene mixtures, forming O/W emulsions at very high internal phase content with rather low concentration of particles. Nonspherical emulsion droplets were observed, indicating that these Janus particles are likely to jam at interface, forming a strong protecting layer to stabilize emulsions.

 

文章链接:

http://pubs.acs.org/doi/ipdf/10.1021/la302392s

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