Poly(acrylamide-co-styrene): A Macrosurfactant for Oil/Water Emulsion Templating toward Robust Macroporous Hydrogels

Emina Muratspahic; Jana Schöffmann; Qixiang Jiang; Alexander Bismarck

doi:10.1021/acs.macromol.2c02504

Poly(acrylamide-co-styrene): A Macrosurfactant for Oil/Water Emulsion Templating toward Robust Macroporous Hydrogels

Emina Muratspahic, Jana Schöffmann, Qixiang Jiang (Corresponding author), Alexander Bismarck (Corresponding author)

Department of Materials Chemistry

Publications: Contribution to journal › Article › Peer Reviewed

Abstract

Large amounts of relatively expensive small-molecule surfactants, between 6 and 25%, are typically required for the formulation of oil/water high or medium internal phase emulsion (H/MIPE) templates. We synthesized an amphiphilic “macrosurfactant” copolymer poly(acrylamide-co-styrene) via micellar polymerization. As-synthesized poly(acrylamide-co-styrene) still associated with 0.01 wt % cetyltrimethylammonium bromide (CTAB) can be used to produce stable toluene or cyclohexane-in-water H/MIPEs already at concentrations of 0.1 wt %. Emulsion templates containing 2-hydroxyethyl methacrylate (HEMA) and N,N-methylenebis(acrylamide) (MBAm) in the aqueous continuous phase can be polymerized to produce macroporous poly(HEMA-co-MBAm)M/HIPEs. Our poly(HEMA-co-MBAm)M/HIPEs synthesized in templates stabilized with much lower emulsifier content were mechanically more robust, in dry and swollen state, as compared with poly(HEMA-co-MBAm)HIPEs reported in the literature.

Original language	English
Pages (from-to)	3213–3223
Number of pages	11
Journal	Macromolecules
Volume	56
Issue number	8
DOIs	https://doi.org/10.1021/acs.macromol.2c02504
Publication status	Published - 4 Apr 2023

Funding

E.M. gratefully acknowledges financial support provided by the Institute of Materials Chemistry of University of Vienna (Grant 371300). The authors acknowledge the financial support from the Institute of Materials Chemistry and Research of the Faculty of Chemistry, University of Vienna (Austria). We are grateful to Mag. Johannes Theiner for technical assistance with elemental analysis and to Prof. Dominik Eder, Dr. Niusha Lasemi, and Dr. Davide Ret for providing resources and technical support with SLS measurements. We also acknowledge the help of Dr. Katrin Weiland and Dr. Hande Barkan-Öztürk for their assistance with DVS and density measurements as well as Prof. Christian Gruber and Nataša Tomašević for providing access to their freeze-dryer while ours was on repair. a

Austrian Fields of Science 2012

104011 Materials chemistry
104019 Polymer sciences

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https://phaidra.univie.ac.at/o:1971535Licence: CC BY 4.0

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title = "Poly(acrylamide-co-styrene): A Macrosurfactant for Oil/Water Emulsion Templating toward Robust Macroporous Hydrogels",

abstract = "Large amounts of relatively expensive small-molecule surfactants, between 6 and 25\%, are typically required for the formulation of oil/water high or medium internal phase emulsion (H/MIPE) templates. We synthesized an amphiphilic “macrosurfactant” copolymer poly(acrylamide-co-styrene) via micellar polymerization. As-synthesized poly(acrylamide-co-styrene) still associated with 0.01 wt \% cetyltrimethylammonium bromide (CTAB) can be used to produce stable toluene or cyclohexane-in-water H/MIPEs already at concentrations of 0.1 wt \%. Emulsion templates containing 2-hydroxyethyl methacrylate (HEMA) and N,N-methylenebis(acrylamide) (MBAm) in the aqueous continuous phase can be polymerized to produce macroporous poly(HEMA-co-MBAm)M/HIPEs. Our poly(HEMA-co-MBAm)M/HIPEs synthesized in templates stabilized with much lower emulsifier content were mechanically more robust, in dry and swollen state, as compared with poly(HEMA-co-MBAm)HIPEs reported in the literature.",

author = "Emina Muratspahic and Jana Sch{\"o}ffmann and Qixiang Jiang and Alexander Bismarck",

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AU - Jiang, Qixiang

AU - Bismarck, Alexander

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AB - Large amounts of relatively expensive small-molecule surfactants, between 6 and 25%, are typically required for the formulation of oil/water high or medium internal phase emulsion (H/MIPE) templates. We synthesized an amphiphilic “macrosurfactant” copolymer poly(acrylamide-co-styrene) via micellar polymerization. As-synthesized poly(acrylamide-co-styrene) still associated with 0.01 wt % cetyltrimethylammonium bromide (CTAB) can be used to produce stable toluene or cyclohexane-in-water H/MIPEs already at concentrations of 0.1 wt %. Emulsion templates containing 2-hydroxyethyl methacrylate (HEMA) and N,N-methylenebis(acrylamide) (MBAm) in the aqueous continuous phase can be polymerized to produce macroporous poly(HEMA-co-MBAm)M/HIPEs. Our poly(HEMA-co-MBAm)M/HIPEs synthesized in templates stabilized with much lower emulsifier content were mechanically more robust, in dry and swollen state, as compared with poly(HEMA-co-MBAm)HIPEs reported in the literature.

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Poly(acrylamide-co-styrene): A Macrosurfactant for Oil/Water Emulsion Templating toward Robust Macroporous Hydrogels

Abstract

Funding

Austrian Fields of Science 2012

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