The indiscriminate discharge of industrial wastewater and oil leakage accidents cause serious water pollution and pose threats to aquatic ecosystems and sanitary environments.The oily wastewater system is complex and ...The indiscriminate discharge of industrial wastewater and oil leakage accidents cause serious water pollution and pose threats to aquatic ecosystems and sanitary environments.The oily wastewater system is complex and most membrane materials cannot separate various oil-water mixtures.S erious membrane pollution would cause a decrease in separation flux.We proposed a pre-identified organic hydrogel surface prepared by micro-nano manufacturing technology for selective oil/water separation with ultra-high separating flux.Stimulated by water,the prepared surface is superhydrophilic-underwater superoleophobic,allowing water to pass through,and stimulated by oil,the prepared surface is superoleophilic-underoil superhydrophobic,allowing oil to pass through.Thus,based on the special solvent-responsive property,the prepared surface has a pre-identified function for water and oil,and could achieve the capture of oil droplets in water and water droplets in oil.In addition,the surface maintains an ultra-high separating efficiency and flux of about 99.85%and 17750 L·m^(-2)·h^(-1),and even after continuous cycles without cleaning,it could keep 99.1%and 16000 L·m^(-2)·h^(-1)due to the excellent anti-fouling ability.This study provides new ideas and methods for designing intelligent oil-water separation devices,and further guidance for achieving on-demand oily wastewater treatment.展开更多
Nonconventional fluorescent materials,which are nonaromatic or consist of isolated aromatic systems,have attracted extensive attention because of their aggregation-induced emission properties.The mechanism of nonconve...Nonconventional fluorescent materials,which are nonaromatic or consist of isolated aromatic systems,have attracted extensive attention because of their aggregation-induced emission properties.The mechanism of nonconventional fluorescence remains incompletely understood,hindering the prediction and modulation of its emission color.Achieving full-color tunability in such systems,particularly within elastomers,is highly challenging.Herein,fluorescent cross-linked polysiloxanes are synthesized using aliphatic amino-terminated polysiloxane and glutaraldehyde,exhibiting full-color emission that can be continuously tuned through thermal treatments within a single material system.Thermal treatment of cross-linked polysiloxanes enables precise control over the structural evolution of fluorophores from imines to 3-(2-piperidyl)pyridinium derivatives and their aggregation states.It enables the continuous and wide-range modulation of the emission color.Additionally,the intramolecular and intermolecular charge transfers of the novel unconventional fluorophore,3-(2-piperidyl)pyridinium derivatives,have been identified,which are of great significance for aggregation-induced bathochromic fluorescence.Prepared from all commercial chemicals,these cross-linked polysiloxanes show great potential for large-scale production and applications,especially as flexible fluorescent light-conversion layers and solvent-responsive smart materials.Furthermore,our research is expected to inspire the innovation of unconventional fluorophores in multiple dimensions.展开更多
基金the National Natural Science Foundation of China(Nos.52475301,52005222,and 12272151)Open Fund for Key Laboratory of Bionic Engineering(Ministry of Education)of Jilin University(K202207)。
文摘The indiscriminate discharge of industrial wastewater and oil leakage accidents cause serious water pollution and pose threats to aquatic ecosystems and sanitary environments.The oily wastewater system is complex and most membrane materials cannot separate various oil-water mixtures.S erious membrane pollution would cause a decrease in separation flux.We proposed a pre-identified organic hydrogel surface prepared by micro-nano manufacturing technology for selective oil/water separation with ultra-high separating flux.Stimulated by water,the prepared surface is superhydrophilic-underwater superoleophobic,allowing water to pass through,and stimulated by oil,the prepared surface is superoleophilic-underoil superhydrophobic,allowing oil to pass through.Thus,based on the special solvent-responsive property,the prepared surface has a pre-identified function for water and oil,and could achieve the capture of oil droplets in water and water droplets in oil.In addition,the surface maintains an ultra-high separating efficiency and flux of about 99.85%and 17750 L·m^(-2)·h^(-1),and even after continuous cycles without cleaning,it could keep 99.1%and 16000 L·m^(-2)·h^(-1)due to the excellent anti-fouling ability.This study provides new ideas and methods for designing intelligent oil-water separation devices,and further guidance for achieving on-demand oily wastewater treatment.
基金supported by the National Natural Science Foundation of China(Grants 51373179,51073163,51803218,and 51373184).
文摘Nonconventional fluorescent materials,which are nonaromatic or consist of isolated aromatic systems,have attracted extensive attention because of their aggregation-induced emission properties.The mechanism of nonconventional fluorescence remains incompletely understood,hindering the prediction and modulation of its emission color.Achieving full-color tunability in such systems,particularly within elastomers,is highly challenging.Herein,fluorescent cross-linked polysiloxanes are synthesized using aliphatic amino-terminated polysiloxane and glutaraldehyde,exhibiting full-color emission that can be continuously tuned through thermal treatments within a single material system.Thermal treatment of cross-linked polysiloxanes enables precise control over the structural evolution of fluorophores from imines to 3-(2-piperidyl)pyridinium derivatives and their aggregation states.It enables the continuous and wide-range modulation of the emission color.Additionally,the intramolecular and intermolecular charge transfers of the novel unconventional fluorophore,3-(2-piperidyl)pyridinium derivatives,have been identified,which are of great significance for aggregation-induced bathochromic fluorescence.Prepared from all commercial chemicals,these cross-linked polysiloxanes show great potential for large-scale production and applications,especially as flexible fluorescent light-conversion layers and solvent-responsive smart materials.Furthermore,our research is expected to inspire the innovation of unconventional fluorophores in multiple dimensions.
