This title appears in the Scientific Report :
2021
Please use the identifier:
http://hdl.handle.net/2128/26289 in citations.
Please use the identifier: http://dx.doi.org/10.1016/j.jcis.2020.08.106 in citations.
Emulsion templating: Unexpected morphology of monodisperse macroporous polymers
Emulsion templating: Unexpected morphology of monodisperse macroporous polymers
Hypothesis: We synthesised monodisperse macroporous polymers via polymerisation of water-in-monomer droplet emulsions and obtained non-spherical pores with layered pore walls. We hypothesise that this morphology is caused by surfactant diffusion and phase separation during polymerisation.Experiments...
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Personal Name(s): | Koch, Lukas |
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Botsch, Sophia / Stubenrauch, Cosima (Corresponding author) | |
Contributing Institute: |
Heinz Maier-Leibnitz Zentrum; MLZ Neutronenstreuung; JCNS-1 JCNS-FRM-II; JCNS-FRM-II |
Published in: | Journal of colloid and interface science, 582 (2021) S. 834 - 841 |
Imprint: |
Amsterdam [u.a.]
Elsevier
2021
|
DOI: |
10.1016/j.jcis.2020.08.106 |
Document Type: |
Journal Article |
Research Program: |
FRM II / MLZ Jülich Centre for Neutron Research (JCNS) |
Subject (ZB): | |
Link: |
Published on 2020-08-29. Available in OpenAccess from 2021-08-29. Restricted |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1016/j.jcis.2020.08.106 in citations.
Hypothesis: We synthesised monodisperse macroporous polymers via polymerisation of water-in-monomer droplet emulsions and obtained non-spherical pores with layered pore walls. We hypothesise that this morphology is caused by surfactant diffusion and phase separation during polymerisation.Experiments: We varied the surfactant mass fraction of the emulsions and polymerised the templates with a water-soluble initiator. From the resulting macroporous polymers we determined the shape of the pores and thickness of the layers via scanning election microscopy. The response of the monomer/surfactant mixture to polymerisation was studied by a ternary phase diagram that simulated polymerisation. Findings:The emergence of non-spherical pores with layered pore walls is indeed caused by surfactant diffusion and phase separation. During polymerisation the surfactant molecules diffuse either to the water/monomer interface or deeper into the continuous monomer phase. The first process results in non-spherical pores, while the second process generates layered pore walls. |