Abstract
Although many material designs or strategic methods have been proposed for treating oil spills and oily wastewater,the complex oily state,dealing with the harsh operating conditions of oil-water separation(such as the recovery of viscous spilled crude oil,bacteria-containing oily wastewa-ter,and removal of spilled oil under fire),and the autorecycling of oil and absorption materials re-main a great challenge.This work proposed an ingenious design strategy of"several birds with one stone"to prepare pH/thermoresponsive flame-retardant/photothermal bactericidal P-Fe304-polydopamine(PDA)@melamine-formaldehyde(MF)foams.This design makes the foams remarkably effective in the re-covery of spilled viscous crude oil as well as in the separation of bacteria-containing oily emulsions,par-ticularly for instant fire extinguishing by magnetically controlled oil absorption as well as for fire alarms.The photothermal effect and pH response induce a change in the surface wettability of the foams,facil-itating excellent autoadsorption/desorption of the spilled oil.The photothermal bactericidal activity and fouling resistance of the foam are beneficial to the separation of bacteria-containing oily wastewater.Outstanding flame-retardant properties and maneuverable magnetic control enable the foam to rapidly recover the spilled oil in a large range of fires,extinguish fires instantly,and facilitate early fire warn-ing.The proposed strategy is expected to inspire further research on treating oil spills under complex conditions.
基金项目
国家自然科学基金(22078077)
National Science Foundation of Guangdong Province(2021A1515010078)
Taif University Researchers Supporting Project(TURSP-2020/14)
Taif University,Taif,Saudi Arabia()
NETL
NSTL
万方数据