Journal
CARBOHYDRATE POLYMERS
Volume 237, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2020.116133
Keywords
Cellulosic sponges; pH responsive; Enamine bonds; Switchable wettability; Oil-water separation
Categories
Funding
- Fundamental Research Funds for the Central Universities [2232018A3-04, CUSF-DH-D-2019062]
- Graduate Student Innovation Fund of Donghua University [CUSF-DH-D-2019062]
Ask authors/readers for more resources
To obtain efficient oil-water separation materials with responsiveness, cellulosic porous materials with switchable wettability in response to pH changes were developed by reacting cellulose acetoacetate sponges with alkylamines of varying carbon chain length via dynamic covalent enamine bonds. The resulting sponges reversibly changed between being superhydrophilic (theta(water) = 0 degrees) and highly hydrophobic (maximal theta(water) = 146 degrees) under suitable pH conditions while maintained the favorable porous structures. Notably, the functionalized sponges exhibited high and selective oil absorption capacity (40-80 g/g) and satisfying desorption ability of 80%, and could efficiently separate oil-water mixtures and emulsions with extremely high efficiency (> 99%) in a controllable manner. With the three-dimensional micro/nano porous structure, switchable wettability and intrinsic environmentally friendliness, the pH responsive cellulosic sponges developed here hold great potential in controllable oil-water separation and oily wastewater purification.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available