Advanced emulsions via noncovalent interaction-mediated interfacial self-assembly

We demonstrate that the traditional emulsification theory can be enriched by a self-assembly approach, in which hydrophilic copolymers with one block exhibiting noncovalent forces with the oil phase self-assemble at the oil-water interface, thereby reducing interfacial tension and forming emulsions....

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Published inChemical communications (Cambridge, England) Vol. 54; no. 25; pp. 3174 - 3177
Main Authors Han, Songling, An, Huijie, Tao, Hui, Li, Lanlan, Qi, Yuantong, Ma, Yongchang, Li, Xiaohui, Wang, Ruibing, Zhang, Jianxiang
Format Journal Article
LanguageEnglish
Published England Royal Society of Chemistry 28.03.2018
Subjects
Block copolymers
Chemical bonds
Emulsions
Hydrogen bonding
Nanoemulsions
Nanomaterials
Self-assembly
Surface tension
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Summary:We demonstrate that the traditional emulsification theory can be enriched by a self-assembly approach, in which hydrophilic copolymers with one block exhibiting noncovalent forces with the oil phase self-assemble at the oil-water interface, thereby reducing interfacial tension and forming emulsions. This approach was established using affinity diblock copolymers that can interact with oil molecules through electrostatic interactions or hydrogen-bonding. Nanoemulsions with excellent stability were successfully obtained simply via vortexing. The self-assembled emulsions showed unexpected catastrophic phase inversion, further extending the phase structures to bicontinuous and reverse emulsions. Complex emulsions could also be fabricated by this strategy. In addition, the thus prepared nanoemulsions can be used to engineer different nanomaterials.
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ISSN:1359-7345
1364-548X
DOI:10.1039/c8cc00016f