Phase inversion of ionomer-stabilized emulsions to form high internal phase emulsions (HIPEs) Zhang, Tao, Xu, Zhinguang, Cai, Zengxiao and Guo, Qipeng 2015, Phase inversion of ionomer-stabilized emulsions to form high internal phase emulsions (HIPEs), Physical chemistry chemical physics, vol. 17, no. 24, pp. 16033-16039, doi: 10.1039/c5cp01157d. Attached Files Name Description MIMEType Size Downloads zhang-phaseinversion-2015.pdf Published version application/pdf 912.66KB 376 Title Phase inversion of ionomer-stabilized emulsions to form high internal phase emulsions (HIPEs) Author(s) Zhang, Tao Xu, Zhinguang Cai, Zengxiao Guo, Qipeng orcid.org/0000-0001-7113-651X Journal name Physical chemistry chemical physics Volume number 17 Issue number 24 Start page 16033 End page 16039 Total pages 7 Publisher Royal Society of Chemistry Place of publication Cambridge, Eng. Publication date 2015-06-28 ISSN 1463-9084 Keyword(s) Science & Technology Physical Sciences Chemistry, Physical Physics, Atomic, Molecular & Chemical Chemistry Physics IN-OIL EMULSIONS STAR CCS POLYMERS SULFONATED POLYSTYRENE WATER EMULSIONS POROUS POLYMERS BLOCK IONOMER SURFACTANT MORPHOLOGY ORGANOGELS PARTICLES Summary Herein, we report the phase inversion of ionomer-stabilized emulsions to form high internal phase emulsions (HIPEs) induced by salt concentration and pH changes. The ionomers are sulfonated polystyrenes (SPSs) with different sulfonation degrees. The emulsion types were determined by conductivity measurements, confocal microscopy and optical microscopy, and the formation of HIPE organogels was verified by the tube-inversion method and rheological measurements. SPSs with high sulfonation degrees (water-soluble) and low sulfonation degrees (water-insoluble) can stabilize oil-in-water emulsions; these emulsions were transformed into water-in-oil HIPEs by varying salt concentrations and/or changing the pH. SPS, with a sulfonation degree of 11.6%, is the most efficient, and as low as 0.2 (w/v)% of the organic phase is enough to stabilize the HIPEs. Phase inversion of the oil-in-water emulsions occurred to form water-in-oil HIPEs by increasing the salt concentration in the aqueous phase. Two phase inversion points from oil-in-water emulsions to water-in-oil HIPEs were observed at pH 1 and 13. Moreover, synergetic effects between the salt concentration and pH changes occurred upon the inversion of the emulsion type. The organic phase can be a variety of organic solvents, including toluene, xylene, chloroform, dichloroethane, dichloromethane and anisole, as well as monomers such as styrene, butyl acrylate, methyl methacrylate and ethylene glycol dimethacrylate. Poly(HIPEs) were successfully prepared by the polymerization of monomers as the continuous phase in the ionomer-stabilized HIPEs. Language eng DOI 10.1039/c5cp01157d Field of Research 091209 Polymers and Plastics Socio Economic Objective 860607 Plastic Products (incl. Construction Materials) HERDC Research category C1 Refereed article in a scholarly journal ERA Research output type C Journal article Copyright notice ©2015, Royal Society of Chemistry Free to Read? Yes Persistent URL http://hdl.handle.net/10536/DRO/DU:30075552 Document type: Journal Article Collections: Institute for Frontier Materials Open Access Collection GTP Research Related Links Link Description Connect to Elements publication management system Go to link with your DU access privileges   Connect to published version Go to link with your DU access privileges   Author URL Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au. Versions Version Filter Type Mon, 17 Aug 2015, 16:00:40 EST Mon, 17 Aug 2015, 16:38:24 EST Thu, 03 Sep 2015, 15:01:13 EST Thu, 03 Sep 2015, 15:02:01 EST Fri, 04 Sep 2015, 06:08:10 EST Fri, 04 Sep 2015, 11:56:29 EST Fri, 04 Sep 2015, 12:02:00 EST Wed, 07 Sep 2016, 10:07:29 EST Wed, 06 Dec 2017, 06:16:16 EST Fri, 07 Sep 2018, 17:37:14 EST Filtered Full Citation counts:   Cited 16 times in TR Web of Science Cited 16 times in Scopus Search Google Scholar Access Statistics: 398 Abstract Views, 377 File Downloads  -  Detailed Statistics Created: Thu, 03 Sep 2015, 15:02:01 EST