4 years ago

Microdroplet Generation with Dilute Surfactant Concentration in a Modified T-Junction Device

Microdroplet Generation with Dilute Surfactant Concentration in a Modified T-Junction Device
Kai Wang, Yankai Li, Guangsheng Luo
Emulsions with very low surfactant concentration or without surfactant are highly required in many fields. Microfluidics have proven to be a promising emulsion preparation method. However, for the fresh interface formation during microfluidic droplet generation, excessive amounts of surfactant are also demanded to speed up surfactant transfer and drive low interfacial tensions. Here we present a newly designed capillary embedded T-junction microdevice to intensify surfactant mass transfer for microdroplet generation. Within the device, surfactant molecules are concentrated onto the tip of the droplet breakup very fast by hydrodynamic forces, leading to extremely low dynamic IFTs temporarily. Microdroplets as small as 15 μm are generated with surfactant concentrations significantly lower than their CMC values, when the concentrations of SDS, Tween 20, and F68 are only 0.05 wt % (1/6 CMC), 0.20 wt % (4/7 CMC), and 0.20 wt % (2/3 CMC) individually. The novel method would be promising in fields of biocompatible material, drug delivery, and food-grade microemulsions.

Publisher URL: http://dx.doi.org/10.1021/acs.iecr.7b02588

DOI: 10.1021/acs.iecr.7b02588

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.