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1. (WO2018183150) AROMA-LOADED MICROCAPSULES WITH ANTIBACTERIAL ACTIVITY FOR ECO-FRIENDLY APPLICATIONS

Pub. No.:    WO/2018/183150    International Application No.:    PCT/US2018/024258
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Tue Mar 27 01:59:59 CEST 2018
IPC: B01J 13/06
B01J 13/16
C11B 9/00
Applicants: THE AMERICAN UNIVERSITY IN CAIRO
UNIVERSIDADE DO PORTO
INSTITUTO POLITECNICO DE BRAGANCA
Inventors: SHARKAWY, Asma, Mohamad Abdallah
SHOEIB, Tamer
RODRIGUES, Alirio, Egidio
BARREIRO, Maria, Filomena Filipe
FERNANDES, Isabel, Patricia Martins
Title: AROMA-LOADED MICROCAPSULES WITH ANTIBACTERIAL ACTIVITY FOR ECO-FRIENDLY APPLICATIONS
Abstract:
Fragrant and antimicrobial properties were conferred to cotton fabrics following microencapsulation using green materials. Limonene and vanillin microcapsules were produced by complex coacervation using chitosan/gum Arabic as shell materials and tannic acid as hardening agent. The effect of two emulsifiers; Span 85 and polyglycerol polyricinoleate (PGPR), on the encapsulation efficiency (EE%), microcapsule's size and morphology, and cumulative release profiles was studied. The use of Span 85 resulted in mononuclear morphology while PGPR gave rise to polynuclear structures, regardless of the core material (vanillin or limonene). The obtained microcapsules demonstrated a sustained release pattern. Grafting of the produced microcapsules onto cotton fabrics through an esterification reaction using citric acid as a non-toxic cross-linker followed by thermofixation and curing, was confirmed by SEM and FTIR spectroscopy. Standard antibacterial assays conducted on both microcapsules alone and impregnated onto the fabrics indicated a sustained antibacterial activity.