Host–vip molecular recognition at the liquid–liquid interface endows the interface with unique properties,including stimuli-responsiveness and self-regulation,due to the dynamic and reversible nature of non-covale...Host–vip molecular recognition at the liquid–liquid interface endows the interface with unique properties,including stimuli-responsiveness and self-regulation,due to the dynamic and reversible nature of non-covalent interactions.Increasing research efforts have been put into the preparation of supramolecular interfacial systems such as films and microcapsules by integrating functional components(e.g.,colloidal particles,polymers)at the interface,providing tremendous opportunities in the areas of encapsulation,delivery vehicles,and biphasic reaction systems.In this review,we summarize recent progress in supramolecular interfacial systems assembled by host–vip chemistry,and provide an overview of the fabrication process,functions,and promising applications of the resultant constructs.展开更多
Oil-in-oil nonaqueous emulsions are of great interest for developing emulsion-templated polymers and encapsulation systems that are incompatible with water-sensitive substances.Tailor-made amphiphilic block copolymers...Oil-in-oil nonaqueous emulsions are of great interest for developing emulsion-templated polymers and encapsulation systems that are incompatible with water-sensitive substances.Tailor-made amphiphilic block copolymers are by far the most efficient stabilizers for oil-in-oil emulsions while less attention is given to copolymers with more complex architectures.Here,we report the stabilization of DMSO-silicone oil interface by bottlebrush random copolymers(BRCPs)containing norbornene backbones with densely grafted poly(methyl methacrylate)(PMMA)and polystyrene(PS)side chains.The assembly kinetics of BRCPs at the DMSO-silicone oil interface can be divided into three processes,including diffusion,reconfiguration and reorganization,and can be varied by tuning the degree of polymerization of the backbone(NB).Due to the high efficiency of BRCPs in reducing the interfacial tension,when using BRCPs as stabilizers,stable silicone oil-in-DMSO traditional emulsions and high internal phase emulsions(HIPEs)can be successfully obtained,while no stable emulsions can be achieved with linear PMMA-b-PS serving as the stabilizer.This study,for the first time,underscores the great potential of amphiphilic bottlebrush copolymers in preparing oil-in-oil emulsions.Given the advances in polymerization strategy,a broad variety of amphiphilic bottlebrush copolymers are expected to be synthesized and applied in the stabilization of nonaqueous biphasic systems.展开更多
Oil-in-oil emulsions provide a unique platform for numerous applications not compatible with water or aqueous systems.However,the limited types and complicated synthesis process of surfactants are problematic.Here,we ...Oil-in-oil emulsions provide a unique platform for numerous applications not compatible with water or aqueous systems.However,the limited types and complicated synthesis process of surfactants are problematic.Here,we put forward a simple,yet powerful strategy to stabilize the oil–oil interface,then prepare oil-in-oil emulsions,by using the co-assembly of polar molecular brushes and nonpolar oligomeric ligands at the DMF–octane interface.Molecular brush surfactants(MBSs)form and assemble in situ at the interface,minimizing the interfacial energy and producing a robust film.We find that the binding energy of MBS to the interface is sufficiently high,leading to the construction of structured liquids by the interfacial jamming of MBSs.Using MBSs as emulsifiers,different types of emulsions including DMF-inoctane,octane-in-DMF,and high internal phase emulsions can be easily prepared,showing promising applications in microreactor systems and advanced composite materials.展开更多
Nanoparticle surfactants(NPSs)that form via the reversible non-covalent interactions between nanoparticles(NPs)and polymer ligands at the oil-water interface have received great attention in constructing structured li...Nanoparticle surfactants(NPSs)that form via the reversible non-covalent interactions between nanoparticles(NPs)and polymer ligands at the oil-water interface have received great attention in constructing structured liquids with unique stimuliresponsiveness.Introducing dynamic covalent interactions to generate NPSs is expected to achieve a balance between high mechanical strength and dynamic responsiveness of the interfacial assemblies.Here,we present the formation,assembly,and jamming of a new type of NPS by the co-assembly between polydopamine NPs(PDA NPs)and poly(styrene-co-methacrylamidophenylboronic acid)at the oilwater interface.Dynamic covalent boronate ester bonds form in situ at the interface and show multiple responsiveness when applying stimuli such as pH,H_(2)O_(2),and temperature,allowing the controlled assembly/jamming of NPSs and reconfiguration of liquid constructs.Due to the photothermal property of PDA NPs,the temperature responsiveness of boronate ester bonds can also be triggered by irradiating the biphasic system with near-infrared(NIR)light.Moreover,when bringing two droplets encapsulated with NPSs into contact and irradiating the contact area by NIR,thermal welding of droplets can be realized,offering a straightforward to construct droplet networks and modular liquid devices.展开更多
基金This work was supported by National Natural Science Foundation of China(51903011)Thomas P.Russell was supported by the US Department of Energy,Office of Science,Office of Basic Energy Sciences,Materials Sciences and Engineering Division under Contract No.DE-AC02-05-CH11231 within the Adaptive Interfacial Assemblies Towards Structuring Liquids program(KCTR16).
文摘Host–vip molecular recognition at the liquid–liquid interface endows the interface with unique properties,including stimuli-responsiveness and self-regulation,due to the dynamic and reversible nature of non-covalent interactions.Increasing research efforts have been put into the preparation of supramolecular interfacial systems such as films and microcapsules by integrating functional components(e.g.,colloidal particles,polymers)at the interface,providing tremendous opportunities in the areas of encapsulation,delivery vehicles,and biphasic reaction systems.In this review,we summarize recent progress in supramolecular interfacial systems assembled by host–vip chemistry,and provide an overview of the fabrication process,functions,and promising applications of the resultant constructs.
基金supported by Beijing Natural Science Foundation(2222071)National Natural Science Foundation of China(52322310,52173018,22372005).
文摘Oil-in-oil nonaqueous emulsions are of great interest for developing emulsion-templated polymers and encapsulation systems that are incompatible with water-sensitive substances.Tailor-made amphiphilic block copolymers are by far the most efficient stabilizers for oil-in-oil emulsions while less attention is given to copolymers with more complex architectures.Here,we report the stabilization of DMSO-silicone oil interface by bottlebrush random copolymers(BRCPs)containing norbornene backbones with densely grafted poly(methyl methacrylate)(PMMA)and polystyrene(PS)side chains.The assembly kinetics of BRCPs at the DMSO-silicone oil interface can be divided into three processes,including diffusion,reconfiguration and reorganization,and can be varied by tuning the degree of polymerization of the backbone(NB).Due to the high efficiency of BRCPs in reducing the interfacial tension,when using BRCPs as stabilizers,stable silicone oil-in-DMSO traditional emulsions and high internal phase emulsions(HIPEs)can be successfully obtained,while no stable emulsions can be achieved with linear PMMA-b-PS serving as the stabilizer.This study,for the first time,underscores the great potential of amphiphilic bottlebrush copolymers in preparing oil-in-oil emulsions.Given the advances in polymerization strategy,a broad variety of amphiphilic bottlebrush copolymers are expected to be synthesized and applied in the stabilization of nonaqueous biphasic systems.
基金Beijing Natural Science Foundation,Grant/Award Number:2222071National Natural Science Foundation of China,Grant/Award Numbers:52173018,51903011。
文摘Oil-in-oil emulsions provide a unique platform for numerous applications not compatible with water or aqueous systems.However,the limited types and complicated synthesis process of surfactants are problematic.Here,we put forward a simple,yet powerful strategy to stabilize the oil–oil interface,then prepare oil-in-oil emulsions,by using the co-assembly of polar molecular brushes and nonpolar oligomeric ligands at the DMF–octane interface.Molecular brush surfactants(MBSs)form and assemble in situ at the interface,minimizing the interfacial energy and producing a robust film.We find that the binding energy of MBS to the interface is sufficiently high,leading to the construction of structured liquids by the interfacial jamming of MBSs.Using MBSs as emulsifiers,different types of emulsions including DMF-inoctane,octane-in-DMF,and high internal phase emulsions can be easily prepared,showing promising applications in microreactor systems and advanced composite materials.
基金National Natural Science Foundation of China,Grant/Award Numbers:52322310,52173018,22372005Beijing Natural Science Foundation,Grant/Award Number:2222071。
文摘Nanoparticle surfactants(NPSs)that form via the reversible non-covalent interactions between nanoparticles(NPs)and polymer ligands at the oil-water interface have received great attention in constructing structured liquids with unique stimuliresponsiveness.Introducing dynamic covalent interactions to generate NPSs is expected to achieve a balance between high mechanical strength and dynamic responsiveness of the interfacial assemblies.Here,we present the formation,assembly,and jamming of a new type of NPS by the co-assembly between polydopamine NPs(PDA NPs)and poly(styrene-co-methacrylamidophenylboronic acid)at the oilwater interface.Dynamic covalent boronate ester bonds form in situ at the interface and show multiple responsiveness when applying stimuli such as pH,H_(2)O_(2),and temperature,allowing the controlled assembly/jamming of NPSs and reconfiguration of liquid constructs.Due to the photothermal property of PDA NPs,the temperature responsiveness of boronate ester bonds can also be triggered by irradiating the biphasic system with near-infrared(NIR)light.Moreover,when bringing two droplets encapsulated with NPSs into contact and irradiating the contact area by NIR,thermal welding of droplets can be realized,offering a straightforward to construct droplet networks and modular liquid devices.
