|
Authors
|
Zimmerer, C. ; Fredi, G. ; Putzke, S. ; Boldt, R. ; Janke, A. ; Krause, B. ; Drechsler, A. ; Simon, F.
|
|
Title
|
Dopamine as a bioinspired adhesion promoter for the metallization of multi-responsive phase change microcapsules
|
|
Date
|
13.09.2022
|
|
Number
|
60442
|
|
Abstract
|
This work reports on an environmentally friendly method to produce encapsulated phase change material with a thin nickel coating, applicable for heat conversion, storage and thermal management of heat-sensitive components and suitable for active heating by electromagnetic radiation. A critical issue for the metallization is the adhesion between the polymer capsule shell and the metal layer. Based on previous studies using the bio-molecule dopamine as adhesion promoter in composites and for plastics metallization, commercial paraffin microcapsules were coated with an ultrathin polydopamine film via a simple wet chemical process. Subsequently, a thin, uniform and compact nickel layer was produced by electroless metallization. The successful deposition of both layers was verified with a broad range of imaging and spectroscopic techniques. For the first time, surface-enhanced IR spectroscopy was used to study the deposition of ultrathin PDA films. The combination of SEM and energy-dispersive X-ray spectroscopy allowed resolving the spatial distribution of the elements Ni, N, and O in the MC shell. Electrically conducting paths in the Ni shell were verified by conductive AFM. Thermal analysis revealed that the coated microcapsules show a phase change enthalpy of approx. 170 J/g, suitable for thermal storage and management. Additionally, the nickel layer enhanced the thermal diffusivity of the microcapsule powders and enables a fast heating of the PCM microcapsules by microwave radiation, demonstrating the applicability of the metallized MCs for controlled heating applications.
|
|
Publisher
|
Journal of Materials Science
|
|
Wikidata
|
|
|
Citation
|
Journal of Materials Science 57 (2022) 16755-16775
|
|
DOI
|
https://doi.org/10.1007/S10853-022-07658-Y
|
|
Tags
|
|
