Journal
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
Volume 124, Issue 1, Pages -Publisher
SPRINGER
DOI: 10.1007/s00339-017-1358-7
Keywords
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Funding
- National Natural Science Foundation of China [21367022, 51662036]
- Bingtuan Innovation Team in Key Areas [2015BD003]
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Oily wastewater caused by industrial production and crude oil leakage has attracted worldwide attention. Here, a thermo- and pH dual-responsive biodegradable cellulose-based aerogel for oil-water separation was designed and prepared via surface-initiated atom transfer radical polymerization (ATRP) of non-fluorine-containing 2-dimethylaminoethyl methacrylate (DMAEMA). The cellulose-based aerogel exhibit switchable superhydrophilicity with a water contact angle (WCA) of 0 degrees and hydrophobicity (WCA 130 degrees) by modulating pH or temperature. The functionalized cellulose-based aerogels could be used to absorb the water under 60 degrees C (pH 7.0) and pH is 1.0 (T = 25 degrees C), while absorb oil underwater when the temperature is above 60 degrees C (pH 7.0) or pH is 13.0 (T = 25 degrees C). So this adsorbent were suitable for the separation of water-rich or oil-rich oil/water mixtures, and it could adsorb oil over ten times its own weight, and had a good reusability. What's more, the cellulose-based aerogel is green, low cost, and environmental friendly, which makes it a promising candidate to be used for oil-water separation.
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