Journal
COMPOSITES PART B-ENGINEERING
Volume 216, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2021.108884
Keywords
Recycling; Porosity; Surface analysis; Oil; water separation
Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- University of Calgary
- Canada First Research Excellence Fund (CFREF) for its Global Research Initiative in Sustainable Low Carbon Unconventional Resources
- Canada Foundation of Innovation (CFI)
- China Scholarship Council (CSC) scholarship [201806330026]
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A micrometer-sized porous material with superhydrophobicity surface was produced via one-step synthesis using Kraft lignin, showing excellent oil/water separation performance and good recyclability.
A micrometer-sized porous material with superhydrophobicity surface is produced via one-step synthesis using Kraft lignin, a waste from pulp and paper industry, as the starting material. Non-fluorinated silane precursor is used for lignin modification to avoid the environmental, cost, and toxicity issues arising from fluorinated precursor. The silane-modified lignin has rather rough flower-like surface microstructures formed by closely-packed crater pores of different sizes ranging from nanometers to micrometers. The modified lignin exhibits superhydrophobic property with a water contact angle of 156?. The material can effectively separate immiscible oil/ water mixtures with higher than 99% efficiency, and surfactant-stabilized oil/water emulsions with higher than 98% efficiency. The material shows good recyclability and reusability for oil/water mixture and emulsion separation. The silane modification is an attractive route to develop waste lignin into useful materials with potential applications in oil/water separation, which uses a naturally derived and renewable raw material with a singlestep fabrication strategy.
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