Preceramic core-shell particles for the preparation of hybrid colloidal crystal films by melt-shear organization and conversion into porous ceramics
Abstract
In this work, the preparation of porous hybrid particle-based films by core-shell particle design and convenient film preparation is reported. Monodisperse core particles consisting of poly(methyl methacrylate‑co‑allyl methacrylate) (P(MMA‑co‑ALMA)) were synthesized by starved-feed emulsion polymerization followed by the introduction of an initiator-containing monomer (inimer) for subsequent atom transfer radical polymerization (ATRP). The inimer shell allowed for the introduction of allylhydrido polycarbosilane (SMP-10) under ATRP conditions by grafting to the core particles. The functionalization of the prepared core-shell particles was investigated by IR spectroscopy (FTIR), scanning transmission electron microscopy (STEM) and solid-state NMR combined with dynamic nuclear polarization (DNP). The obtained hard core/soft preceramic shell particles were subjected to the melt-shear organization technique, enabling a convenient alignment into a colloidal crystal structure in one single step without the presence of a dispersion medium or solvent for the designed particles. Moreover, the hybrid particle-based films were converted into a porous ceramic structure upon thermal treatment. As a result, freestanding ceramic porous films have been obtained after degradation of the organic template core particles. Noteworthy, the conversion of the matrix material consisting of SMP-10 into the ceramic occurred with preservation of the pristine colloidal crystal template structure. Herein, the first example of core-shell particle preparation by combining different polymerization methodologies and application of the convenient melt-shear organization technique is shown, paving a new way to ceramic materials with tailored morphology and porosity.
Related
- Advancing polyallophanate powder coating performance and function with colloidal lignin particles.
- Preparation of Uniform Nonspherical PLGA Particles in the Nanosize Range by Using a Two-Step Premix Membrane Emulsification Technique
- Combining soft polysilazanes with melt-shear organization of core–shell particles: On the road to polymer-templated porous ceramics
- Electrically conductive silicon oxycarbide thin films prepared from preceramic polymers
- Surfactant-free alcohol-mediated colloidal syntheses of gold nanoparticles beyond aqueous media
BibTeX
@article{vowinkel2026preceramic,
title = {{Preceramic core-shell particles for the preparation of hybrid colloidal crystal films by melt-shear organization and conversion into porous ceramics}},
author = {Steffen Vowinkel and Anna Boehm and Timmy Schäfer and Torsten Gutmann and Emanuel Ionescu and Markus Gallei},
journal = {Materials \& Design},
year = {2026},
month = oct,
doi = {10.1016/j.matdes.2018.10.032},
url = {https://hal.science/hal-05789769v1},
note = {CC BY-NC-ND},
}
RIS
TY - JOUR
TI - Preceramic core-shell particles for the preparation of hybrid colloidal crystal films by melt-shear organization and conversion into porous ceramics
AU - Steffen Vowinkel
AU - Anna Boehm
AU - Timmy Schäfer
AU - Torsten Gutmann
AU - Emanuel Ionescu
AU - Markus Gallei
PY - 2026
DA - 2026/10/09
JO - Materials & Design
DO - 10.1016/j.matdes.2018.10.032
UR - https://hal.science/hal-05789769v1
AB - In this work, the preparation of porous hybrid particle-based films by core-shell particle design and convenient film preparation is reported. Monodisperse core particles consisting of poly(methyl methacrylate‑co‑allyl methacrylate) (P(MMA‑co‑ALMA)) were synthesized by starved-feed emulsion polymerization followed by the introduction of an initiator-containing monomer (inimer) for subsequent atom transfer radical polymerization (ATRP). The inimer shell allowed for the introduction of allylhydrido polycarbosilane (SMP-10) under ATRP conditions by grafting to the core particles. The functionalization of the prepared core-shell particles was investigated by IR spectroscopy (FTIR), scanning transmission electron microscopy (STEM) and solid-state NMR combined with dynamic nuclear polarization (DNP). The obtained hard core/soft preceramic shell particles were subjected to the melt-shear organization technique, enabling a convenient alignment into a colloidal crystal structure in one single step without the presence of a dispersion medium or solvent for the designed particles. Moreover, the hybrid particle-based films were converted into a porous ceramic structure upon thermal treatment. As a result, freestanding ceramic porous films have been obtained after degradation of the organic template core particles. Noteworthy, the conversion of the matrix material consisting of SMP-10 into the ceramic occurred with preservation of the pristine colloidal crystal template structure. Herein, the first example of core-shell particle preparation by combining different polymerization methodologies and application of the convenient melt-shear organization technique is shown, paving a new way to ceramic materials with tailored morphology and porosity.
SN - 0261-3069
SN - 0264-1275
ER -