Preparation and properties of magnetic–photoresponsive oil‐absorption resins

Abstract

A novel magnetic-photoresponsive oil-absorption resin (MPOAR) was synthesized via the suspension polymerization technique. Scanning electron microscopy surface morphology analysis indicated that the surface of MPOAR exhibited pore structures with different sizes. The effects of various factors in the preparation of MPOAR on the oil absorbency were studied. We found that the amount of the crosslinking agent 4 0 4-bis-(methacryloylamino)azobenzen (Azo-CL-M), porogenic agent (ethyl acetate), initiator (azobisisobutyronitrile), and modified Fe 3 O 4 had great effects on the oil absorbencies of the prepared polymer resins. The saturated absorption capacities of MPOAR for various organic solvents were determined, and we found that MPOAR could absorb 19.7 times its dry weight in CH 2 Cl 2 , 18.4 times its dry weight in CCl 4 , and 16.7 times its dry weight in CHCl 3 , respectively. In addition, the oilabsorbent beads could absorb the oils floating on water well. In particular, the saturated absorbed MPOAR could be easily collected from water by an external magnetic field. More importantly, the photoresponsive properties of the MPOAR materials could be used to accelerate the release of the absorbed oil under UV irradiation.

Removal of Oil from a Crude Oil-in-Water Emulsion by a Magnetically Recyclable Diatomite Demulsifier

“…Recently, water pollution caused by oil spillage and industrial oily wastewater discharge has increasingly aroused extensive attention as a result of its harmful effects on the ecosystem and humans. − In oily wastewater, the oil usually exists in four states: oil slick, dispersed oil, emulsified oil, and dissolved oil, , in which the oil slick can be removed by various adsorption materials, such as a hydrophobic macroporous carbon nanotube sponge, polyurethane sponge, and superhydrophobic polymer monolith with an adjustable hierarchical porous structure . In addition, superhydrophobic separation membranes and meshes showed high separation efficiencies for the oil–water mixtures. − For the emulsified oil, such as oil-in-water (O/W) emulsion, the oil and water phases could not be separated by the above-mentioned materials as a result of the stable electrical double layer formed on its surface .…”

Preparation of a composite of polyacrylate and nano‐SiO2 particles and evaluation of its performance of oil–water mixture treatment

“…In addition, the resin still had good oil absorbency and reusability after six adsorption–desorption recycling processes. Liu et al 9 prepared spherical magnetic oil‐absorbing resins (MPOARs) by introducing photosensitive functional compounds and magnetic particles into the polymerization system. In addition, the oil absorbencies to CH 2 Cl 2 , CHCl 3 , and toluene were 19.7, 18.4, and 11.7 g/g, respectively.…”

Amine‐containing olefin copolymer with CO2‐switchable oil absorption and desorption

“…We urgently need functional materials to absorb crude oil and non‐water soluble organic solvents . Over the past decades, polymer absorbents had been widely used . For polymer absorption material, the polymer chains are generally crosslinked.…”