TY - JOUR
T1 - A carbon nanotube-embedded conjugated polymer mesh with controlled oil absorption and surface regeneration via in situ wettability switch
AU - Xu, Jian
AU - Fu, Shichen
AU - Xu, Wei
AU - Yang, Eui Hyeok
N1 - Publisher Copyright:
© 2018 Elsevier Inc.
PY - 2018/12/15
Y1 - 2018/12/15
N2 - This paper presents a mesh-type absorbent made of a carbon nanotube (CNT)-embedded polypyrrole dodecylbenzenesulfonate (PPy(DBS)) surface for controlled absorption and release of oils and regeneration of polymer surfaces toward continuous oil/water separation. The mesh absorbs dichloromethane (DCM) under oxidation in aqueous environment and releases them under reduction via in situ switching of underwater wettability. CNTs were grown out of stainless steel surfaces and embedded into the PPy(DBS) film, which enhanced the switchable wettability as well as the surface regeneration. The CNT-embedded morphology improved oil retention by a factor of two in an oxidized state and decreased wettability switch time by 16% in a reduced state over the mesh without CNT embedment during 250 redox cyclic testing. A rolled 2 cm × 3 cm CNT-embedded PPy(DBS) mesh was furthermore used to demonstrate the continuous absorption and release of oils, during which DCM of 16 times of the absorbent weight was collected in 50 redox cycles.
AB - This paper presents a mesh-type absorbent made of a carbon nanotube (CNT)-embedded polypyrrole dodecylbenzenesulfonate (PPy(DBS)) surface for controlled absorption and release of oils and regeneration of polymer surfaces toward continuous oil/water separation. The mesh absorbs dichloromethane (DCM) under oxidation in aqueous environment and releases them under reduction via in situ switching of underwater wettability. CNTs were grown out of stainless steel surfaces and embedded into the PPy(DBS) film, which enhanced the switchable wettability as well as the surface regeneration. The CNT-embedded morphology improved oil retention by a factor of two in an oxidized state and decreased wettability switch time by 16% in a reduced state over the mesh without CNT embedment during 250 redox cyclic testing. A rolled 2 cm × 3 cm CNT-embedded PPy(DBS) mesh was furthermore used to demonstrate the continuous absorption and release of oils, during which DCM of 16 times of the absorbent weight was collected in 50 redox cycles.
KW - Conjugated polymer
KW - In situ wettability switch
KW - Interfacial tension
KW - Oil/water separation
KW - Surface adhesion
KW - Surfactant
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U2 - 10.1016/j.jcis.2018.08.041
DO - 10.1016/j.jcis.2018.08.041
M3 - Article
C2 - 30138890
AN - SCOPUS:85051662729
SN - 0021-9797
VL - 532
SP - 790
EP - 797
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
ER -