“…In order to further reduce the potential negative environmental impact of synthetic surfactants (Johnson et al, 2021), there is a growing awareness of the need for surfactant recovery and reusability (Bai et al, 2019;Trellu et al, 2016Trellu et al, , 2021Zeng et al, 2020;Zhang et al, 2022). In addition to demulsification on demand, switchable surfactants also provide with the opportunities to recovery and then reuse surfactants in surfactantenhanced washing (Wang et al, 2021;Xu et al, 2018).…”