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Microencapsulation of Limonene for Textile Application

Sofia N. Rodrigues^†, Isabel Fernandes^‡, Isabel M. Martins^†, Vera G. Mata^†, Filomena Barreiro^‡ and Alirio E. Rodrigues*^†

LSRE, Laboratory of Separation and Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal, and LSRE, Laboratory of Separation and Reaction Engineering, Braganca Polytechnic Institute, Campus Santa Apol

nia Ap 1134, 5301-857 Bragan

a, Portugal

Ind. Eng. Chem. Res., 2008, 47 (12), pp 4142–4147

DOI: 10.1021/ie800090c

Publication Date (Web): May 24, 2008

†

University of Porto.

‡

Braganca Polytechnic Institute.

* To whom correspondence should be addressed. E-mail: arodrig@fe.up.pt.

Abstract

Polyurethane−urea microcapsules with limonene oil as the active agent were produced by interfacial polymerization, and their suitability for textile applications was studied. Experimental conditions for the textile substrates impregnation were based on industrial requirements and set up at laboratory scale using a mini-foulard. The success of the polymerization reaction leading to the formation of the polyurethane−urea shell was checked by Fourier transform infrared spectroscopy. Particle size distributions and morphology of the microcapsules were studied using a particle size analyzer (Coulter LS230), optical microscopy, and scanning electron microscopy. The effectiveness of the textiles impregnation and the durability of the impregnation effect were evaluated by scanning electron microscopy and by headspace/GC/FID. Under the present research, a product was developed and its performance, in regard to industrial requirements, was successfully tested.

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