Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Microencapsulation of alkaline salt hydrate melts for phase change applications by surface thiol-michael addition polymerization

 
: Platte, Daniela; Helbig, Uta; Houbertz, Ruth; Sextl, Gerhard

:

Macromolecular materials and engineering 298 (2013), Nr.1, S.67-77
ISSN: 1438-7492
ISSN: 1439-2054
Englisch
Zeitschriftenaufsatz
Fraunhofer ISC ()

Abstract
The microencapsulation of alkaline salt hydrates suitable as inorganic phase change materials (PCMs) via surface Michael-type addition polymerization of thiols and acrylates is reported. The encapsulation performance depending on the resins' acrylate-to-thiol ratio and monomer functionality is investigated, and the best encapsulation performance is found for resin compositions with considerable acrylate excess ratios. The step-growth nature of the reaction can be substantiated via comparative bulk polymerizations. A multistage encapsulation mechanism is proposed in order to explain the different dependencies on the acrylate to thiol ratio observed in PCM encapsulations in comparison to bulk polymerizations.

: http://publica.fraunhofer.de/dokumente/N-225654.html