Pickering emulsions stabilized by self-assembled polymeric micelles of coumarin-containing cross-linkable amphiphilic terpolymer

Wang, Feng; Yu, Xiaoyun; Liu, Hui

doi:10.1007/s00396-017-4259-6

Cited by 5 publications

(3 citation statements)

References 39 publications

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“…prepared pH‐responsive and photo‐cross‐linkable polymers as emulsifiers, and they clarified that the emulsifying properties and stability were related to the structure of polymers. Wang et al . reported a kind of coumarin‐containing polymers as emulsifiers, and they concluded that oil began to separate out owing to the increasing intermolecular cross‐linking under ultraviolet (UV) irradiation and electrostatic repulsion force with the addition of the alkali.…”

Section: Introductionmentioning

confidence: 99%

pH/UV Responsive Polymeric Micelles Based on Coumarin to Tune Emulsification/Solidification Performance

Wang

Liu

2019

ChemistrySelect

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A kind of pH/UV sensitive terpolymer was prepared based on 2-(dimethylamino) ethyl methacrylate, hydroxyethyl methacrylate, and 7-(2-(4-vinylbenzyloxyl)-ethoxy)-4-methyl-coumarin. To well trace the self-assembly process and reversible photocross/de-cross-linking, the pH-and light-responsive behaviors at various conditions were investigated by dynamic light scattering and UV-Vis spectroscopic analysis, respectively. Besides, dual pH-and light-responsive coumarin-containing polymeric micelles could be used to manipulate the emulsion phases and trigger the solidification of emulsions, which was a big breakthrough in the development of particulate emulsifiers. The emulsifying performance could be predicted by the form of aqueous micellar solutions with a certain pH value before oil-water homogenization. Different to the effect of pH value lonely, the conversion from emulsification into solidification could be achieved with the synergetic effect of pH value and UV irradiation. This work might cast new insights on tuning emulsification/solidification performance just by adjusting pH value and UV irradiation time without the need for additives.[a] S.

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Section: Introductionmentioning

confidence: 99%

pH/UV Responsive Polymeric Micelles Based on Coumarin to Tune Emulsification/Solidification Performance

Wang

Liu

2019

ChemistrySelect

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“…Pickering emulsions have been extensively used in many areas such as food industry, biocatalysis, personal care products, and fabrication of new materials. − As a multiphasic dispersion system, emulsions typically consist of three main components: water phase, oil phase, and emulsifier. , Various types of particulate emulsifiers, including inorganic particles, − organic particles, − polymer-modified hybrid particles, − microgels, ,− and self-assembled polymeric micelles, ,− have been used to control the stability and type of the Pickering emulsions (briefly summarized in Table ). Additionally, Pickering emulsions have low toxicity and good biocompatibility as a result of reducing the use of conventional surfactants …”

Section: Introductionmentioning

confidence: 99%

“…In our previous study, a series of polymeric micelles self-assembled from linear amphiphilic random copolymers were employed as particulate emulsifiers. The correlation between the oil/water interfacial property and the emulsifying performance of polymeric micelles was deeply investigated. − We found that the self-assembled micelles based on random copolymers were interfacially active. Different from the clear core–shell structure of the block copolymer micelles, for random copolymer micelles, there were hydrophilic segments inside the micellar hydrophobic core, whereas hydrophobic segments also existed in the micellar hydrophilic surface.…”

Section: Introductionmentioning

confidence: 99%

Dual pH- and Light-Responsive Amphiphilic Random Copolymer Nanomicelles as Particulate Emulsifiers to Stabilize the Oil/Water Interface

Wang

Yang

et al. 2018

J. Phys. Chem. C

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Dual pH-and light-responsive nanomicelles selfassembled from amphiphilic random poly(methacrylic acid-co-methyl methacrylate-co-7-(4-vinylbenzyloxyl)-4-methylcoumarin) (P(MAA-co-MMA-co-VM)) have been successfully prepared and employed as particulate emulsifiers to stabilize the oil/water interface. The selfassembling behavior of copolymers in a selective solvent is explored. The structural transitions of CP55 micelles based on a copolymer with 55 mol % hydrophilic methacrylic acid units are investigated by the dosage of ultraviolet irradiation and pH variation. As pH increases, the ionization of the carboxyl groups leads to the swelling of micelles. Both the size and polydispersity index of cross-linked micelles are far larger than those of un-cross-linked micelles under alkaline conditions. The comparison of the configuration of the un-cross-linked micelles and cross-linked micelles at the oil/water interface is investigated by scanning electron microscopy. The results show that the ability of swelling and conformational changing in response to external pH-and light-triggers largely affected the emulsifying performance of the particulate emulsifiers. Especially for emulsions stabilized by the cross-linked micelles, oil begins to separate out as pH elevated over 7.3 on account of the restricted conformational adjustment that resulted from the increasing interparticle cross-linking and electrostatic repulsion. The findings may be useful for challenging industrial areas where organic macromolecules and surfactants cooperate.

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Reversible crosslinking terpolymer shell-based mesoporous silica nanoparticles as on-off nanocarriers for pyrene-releasing application

Wang

Ouyang

Zhang

et al. 2018

Journal of the Taiwan Institute of Chemical Engineers

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Pickering emulsions stabilized by self-assembled polymeric micelles of coumarin-containing cross-linkable amphiphilic terpolymer

Cited by 5 publications

References 39 publications

pH/UV Responsive Polymeric Micelles Based on Coumarin to Tune Emulsification/Solidification Performance

pH/UV Responsive Polymeric Micelles Based on Coumarin to Tune Emulsification/Solidification Performance

Dual pH- and Light-Responsive Amphiphilic Random Copolymer Nanomicelles as Particulate Emulsifiers to Stabilize the Oil/Water Interface

Reversible crosslinking terpolymer shell-based mesoporous silica nanoparticles as on-off nanocarriers for pyrene-releasing application

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