Textile detergent and softener industries, among others, have been incorporating the recent scientific
advances; such as microencapsulation technology, to successfully improve their final products. Perfume
encapsulation allows perfume protection until use and provides a long-lasting fragrance release. However,
certain current industrial microcapsules show low encapsulation capacity and lack of mechanical
stability. Polysulfone (PSf) microcapsules are an emerging promising alternative as they have both high
mechanical stability and notorious encapsulation capacity.
In the present investigation, PSf/vanillin microcapsules have been prepared by phase inversion precipitation
technique and characterized by Scanning Electron Microscopy (SEM), X-ray diffraction (XRD)
and thermogravimetric analysis (TGA). Vanillin release has been monitored by High Performance Liquid
Chromatography (HPLC). 45% of vanillin encapsulation, from the total perfume added to the polymer
solution, has been reached. A treatment to increase the amount of vanillin inside of capsules has also
been proposed. Concerning perfume release, it has been detected that vanillin is more rapidly released
in hard water than in pure water; but in both cases, vanillin was released continuously for more than
144 h (6 days).
Textile detergent and softener industries, among others, have been incorporating the recent scientificadvances; such as microencapsulation technology, to successfully improve their final products. Perfumeencapsulation allows perfume protection until use and provides a long-lasting fragrance release. However,certain current industrial microcapsules show low encapsulation capacity and lack of mechanicalstability. Polysulfone (PSf) microcapsules are an emerging promising alternative as they have both highmechanical stability and notorious encapsulation capacity.In the present investigation, PSf/vanillin microcapsules have been prepared by phase inversion precipitationtechnique and characterized by Scanning Electron Microscopy (SEM), X-ray diffraction (XRD)and thermogravimetric analysis (TGA). Vanillin release has been monitored by High Performance LiquidChromatography (HPLC). 45% of vanillin encapsulation, from the total perfume added to the polymersolution, has been reached. A treatment to increase the amount of vanillin inside of capsules has alsobeen proposed. Concerning perfume release, it has been detected that vanillin is more rapidly releasedin hard water than in pure water; but in both cases, vanillin was released continuously for more than144 h (6 days).
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