TY  - JOUR
AU  - Koch, Lukas
AU  - Botsch, Sophia
AU  - Stubenrauch, Cosima
TI  - Emulsion templating: Unexpected morphology of monodisperse macroporous polymers
JO  - Journal of colloid and interface science
VL  - 582
SN  - 0021-9797
CY  - Amsterdam [u.a.]
PB  - Elsevier
M1  - FZJ-2020-04752
SP  - 834 - 841
PY  - 2021
AB  - 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.
LB  - PUB:(DE-HGF)16
C6  - 32911424
UR  - <Go to ISI:>//WOS:000600666100006
DO  - DOI:10.1016/j.jcis.2020.08.106
UR  - https://juser.fz-juelich.de/record/888190
ER  -