Alkyl bicarbamates supramolecular organogelators with effective selective gelation and high oil recovery from oil/water mixtures.

Abstract:

:A series of alkyl bicarbamates supramolecular organogelators were synthesized with different structures and lengths of alkyl chains. The driving forces for the self-assembly of small molecules, including the intermolecular H bonding, π-π stacking and van der Waals interactions, played an important role in the formation of different 3D network structures, i.e., fibers, ribbons, sheets, and prisms. And a probable formation process of the gel networks was proposed. Furthermore, the phase-selective gelling performances were investigated for oil removal from aqueous solution. Interestingly, the gelling properties were found to be affected by the length and structure of alkyl chains, while some gelators with intermediate alkyl chain lengths could effectively gel all the tested oils from water surface within 15 min, such as Russian crude oil, diesel, gasoline, soybean oil, peanut oil, olive oil, cyclohexane, hexane and ethyl acetate. Advantageously, fast gelation, high rate of oil removal (>95%) and excellent oil retention rate (close to 100%) were realized in the recovery of oil spills from water surface. This kind of supramolecular gelators demonstrates good potential applications in the delivery or removal of organic pollution from oil/water mixtures.

journal_name

Chemosphere

journal_title

Chemosphere

authors

Wang Y,Wu S,Yan X,Ma T,Shao L,Liu Y,Guo Z

doi

10.1016/j.chemosphere.2016.09.149

subject

Has Abstract

pub_date

2017-01-01 00:00:00

pages

178-187

eissn

0045-6535

issn

1879-1298

pii

S0045-6535(16)31361-3

journal_volume

167

pub_type

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