Lecture Topic:

Filtration Method to Separate Emulsified Oil or Ethanol from Water and a Flexible and Transparent Omniphobic Coating

Lecturer:

Liu Guojun

Time:

November 25, 2019 (Monday) 15:00-17:00

Place:

Room 426, Qiushilou, Zhongguancun Campus

Organizer:

Graduate School, School of Materials

Registration:

Log-in to WeChat enterprise of Beijing Institute of Technology— 第二课堂（The Second Lecture）— Choose No.285 in the Lecture Registration

【Introduction to the lecturer】

Professor Guojun Liu, Tier I Canada Research Chair in Materials Science at Queen’s University, is a pioneer and world leader in the field of polymeric materials science. He made pioneering contributions to polymer self-assembly. In particular, he has led the development of nano- and micro-structured materials constructed from block copolymers and other polymers, and developed multiple industrial products. Professor Liu has been instrumental in advancing block copolymer nanoscience and polymeric nanostructured materials, and his work has resulted in more than 200 peer-reviewed publications, 2 books, and 10 book chapters, with a total citation over 8000 times and an H-index of 51.

【Lecture Information】

During the separation of oil from water using superhydrophobic large-pore filters, the separation of emulsified oil is impossible once the oil droplets are smaller than the filter pores. The separation of solvents such as ethanol that is miscible with water by filtration is not known. In this talk, the high-flux separation of emulsified oil from water using a Janus filter that coalesces emulsified oil droplets and then separates selectively the coalesced oil from water will be discussed, together with the separation of ethanol from water by filtration.

The preparation of oil- and water-repellent omniphobic coatings normally involves the use of perfluorinated agents, which are banned in many countries. The coatings further suffer from lack of wear resistance and optical clarity. In this talk, I also will discuss our invention - transparent omniphobic NP-GLIDE coatings, which contain in their matrices nanometer-sized pools of a grafted lubricating ingredient for de-wetting enablement, using much cheaper and environmentally more friendly poly(dimethyl siloxane).