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Comparison of release behaviour from microcapsules and microspheres

Lars Nordstierna (Institutionen för kemi- och bioteknik, Teknisk ytkemi) ; Atta Alla Abdalla (Institutionen för kemi- och bioteknik, Teknisk ytkemi) ; Matias Nordin (Institutionen för kemi- och bioteknik, Teknisk ytkemi ; SuMo Biomaterials) ; Magnus Nydén (Institutionen för kemi- och bioteknik, Teknisk ytkemi ; SuMo Biomaterials)
Progress in Organic Coatings (0300-9440). Vol. 69 (2010), 1, p. 49-51.
[Artikel, refereegranskad vetenskaplig]

The plasticizing effect of core oil in the polymer shell of core shell particles, so-called microcapsules, was here examined. The study involved release measurements of 4-nitroanisole into aqueous solution from two types of microparticles. In the first study, a microcapsule with PMMA shell and hexadecane core was examined. The second type of particle was a homogeneous PMMA microsphere containing no oil. Experimental data were compared to models that describe release by a diffusion mechanism out from core shell particles as well as homogeneous spherical particles. Results clearly show that the alkane oil has a plasticizing effect on the PMMA shell, thereby generating a faster release of 4-nitroanisole. In both types of microparticles, the diffusion coefficients of 4-nitroanisole could be determined. The findings increase our understanding of important parameters in the microcapsule design with regard to tuning the release behaviour. Using microparticles, the ambition is to prolong the protection of paint and other coatings against fouling.

Nyckelord: Microcapsules, Microspheres, Controlled release, Plasticizer, self-healing coatings, molecules, fabrics, steel, oil

Denna post skapades 2010-08-20. Senast ändrad 2016-04-04.
CPL Pubid: 124959


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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Teknisk ytkemi (2005-2014)
SuMo Biomaterials



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