Polyamide microcapsules containing jojoba oil prepared by inter-facial polymerization.
Jojoba oil containing polyamide microcapsules having diameter of approximately 5 microm were prepared by inter-facial polycondensation by direct method (oil-in-water). Qualitative effects of both the formulation and the process parameters on microcapsules characteristics were investigated by SEM observations. Morphological analysis showed the dependence of the external membrane compactness on the chemical nature of the water-soluble polyamine and the oil-soluble acid polychloride: 1,6-hexamethylenediamine (HMDA) and terephthaloyl dichloride (TDC) were found to favour the production of smooth and dense surfaces. The use of ultrasonic irradiations during the dispersion step to get a further reduction of microcapsules size was also evaluated.
Persico
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Dipartimento di Ingegneria dei Materiali e della Produzione, Universitá di Napoli Frederico II, Italy. paopersi@unina.it
Carfagna
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Danicher
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Frere
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Y
D002214:Capsules; D003432:Cross-Linking Reagents; D003959:Diamines; D004339:Drug Compounding / Q000379:methods; D008855:Microscopy, Electron, Scanning / Q000379:methods; D009757:Nylons; D010316:Particle Size; D010795:Phthalic Acids; D010936:Plant Extracts; D011073:Polyamines; D011108:Polymers; D012995:Solubility; D013499:Surface Properties; D014465:Ultrasonics; D014885:Waxes
D002214:Capsules; D003432:Cross-Linking Reagents; D003959:Diamines; D009757:Nylons; D010795:Phthalic Acids; D010936:Plant Extracts; D011073:Polyamines; D011108:Polymers; D014885:Waxes; C034743:jojoba wax; C059743:terephthaloyl chloride; C007297:1,6-diaminohexane