Production of polyamide 11 microparticles for Additive Manufacturing by liquid-liquid phase separation and precipitation

Journal article


Publication Details

Author(s): Dechet M, Goblirsch A, Romeis S, Zhao M, Lanyi F, Kaschta J, Schubert DW, Drummer D, Peukert W, Schmidt J
Journal: Chemical Engineering Science
Publication year: 2019
Volume: 197
Pages range: 11-25
ISSN: 0009-2509


Abstract

Within this contribution liquid-liquid phase separation (LLPS) and precipitation from ethanol was studied as an approach to produce polyamide 11 (PA11) powders for selective laser sintering (SLS). To this end, the cloud point and solution temperature curve of the PAll-ethanol system was determined experimentally via turbidity measurements. The proper range of system composition and temperature for particle formation was deduced. The dependence of particle characteristics on process parameters (polymer concentration, stirring conditions and temperature regime) during LLPS and precipitation was assessed and the products were characterized with respect to their size and morphology. Furthermore, structural, rheological and thermal characteristics were analyzed and correlated with process parameters. Molecular weight distributions were determined. After removal of fines and dry coating with hydrophobic fumed silica, an optimized PA11 powder with mean particle size of 91 mu m showing good flowability for SLS was obtained. SLS processability of this optimized PA11 powder was demonstrated by building multilayered test specimens in a laser sintering machine. With this contribution, we present a comprehensive workflow for the process development, product characterization and product application of a SLS powder manufactured via precipitation. (C) 2018 Elsevier Ltd. All rights reserved.


FAU Authors / FAU Editors

Dechet, Maximilian
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Drummer, Dietmar Prof. Dr.-Ing.
Lehrstuhl für Kunststofftechnik
Goblirsch, Anja
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Kaschta, Joachim Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Polymerwerkstoffe)
Lanyi, Franz
Lehrstuhl für Werkstoffwissenschaften (Polymerwerkstoffe)
Peukert, Wolfgang Prof. Dr.-Ing.
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Romeis, Stefan Dr.-Ing.
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Schmidt, Jochen Dr.
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Schubert, Dirk W. Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Polymerwerkstoffe)
Zhao, Meng
Sonderforschungsbereich 814 Additive Fertigung


How to cite

APA:
Dechet, M., Goblirsch, A., Romeis, S., Zhao, M., Lanyi, F., Kaschta, J.,... Schmidt, J. (2019). Production of polyamide 11 microparticles for Additive Manufacturing by liquid-liquid phase separation and precipitation. Chemical Engineering Science, 197, 11-25. https://dx.doi.org/10.1016/j.ces.2018.11.051

MLA:
Dechet, Maximilian, et al. "Production of polyamide 11 microparticles for Additive Manufacturing by liquid-liquid phase separation and precipitation." Chemical Engineering Science 197 (2019): 11-25.

BibTeX: 

Last updated on 2019-01-03 at 07:38