A green, facile, and bi-functional waterborne SH suspension fabrication strategy has recently been proposed. Image source: Andrey_Maltsev – Fotolia.com (symbol image).
17. Nov 2020 | Application Areas
Development of a facile and bi-functional superhydrophobic suspension
Researchers report on a superhydrophobic suspension and its application in superhydrophobic coatings and aerogels in high-efficiency oil–water separation.
A superhydrophobic suspension (SH suspension) is an important precursor for the production of superhydrophobic coatings (SH coatings) and sorbents for water-proofing and oil–water separation. However, serious ecological impacts, tedious preparation methods, and low mechanical stability of downstream products significantly hinder the applications of the SH suspension. Now, a green, facile, and bi-functional waterborne SH suspension fabrication strategy is proposed.
Low-cost bi-functional SH suspension
By incorporating hydrophobic nano cellulose fiber (NCF), a low-cost bi-functional SH suspension was obtained as a precursor for the development of both SH coatings and superhydrophobic nano cellulose fiber (SHNCF) aerogels. These results suggest that the process has high economic viability for high-efficiency oil–water separation.
The researchers regard the study to be the first to demonstrate that the use of a waterborne SH suspension incorporated with NCF (as the frame-structure substrate) and SiO2 (as the modifier to increase roughness, hydrophobicity, BET surface area and pore volume) can largely enhance the mechanical stability of both SH coatings and SHNCF aerogels and lead to low production cost and limited environmental impact.
These results can be useful to address the bottlenecks of forming a cost-effective, eco-friendly, and bi-functional SH suspension to meet the real demand.
The study has been published in Green Chemistry, Issue 21, 2020.
The Rheology Handbook
Already in its 5th edition, this standard work describes the principles of rheology clearly, vividly and in practical terms. The book includes the rheology of additives in waterborne dispersions and surfactant systems. Not only it is a great reference book, it can also serve as a textbook for studying the theory behind the methods. The practical use of rheology is presented in the areas quality control, production and application, chemical and mechanical engineering, materials science and industrial research and development. After reading this book, the reader should be able to perform tests with rotational and oscillatory rheometers and interpret the results correctly.
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