شماره ركورد كنفرانس :
360
عنوان مقاله :
Preparation and characterization of melamine-urea-formaldehyde microcapsules containing linseed oil using polyvinylpyrrolidone as emulsifier
پديدآورندگان :
Khalaj Asadi A نويسنده , Mohseni M نويسنده International Sturgeon Research Institute, P.O. Box 41635-3464, Rasht, Guilan, Iran-Department of Aquaculture/Feeds and Foods Nutrition Research Cent , Ebrahimi M نويسنده Center of Excellence for Magnetic Materials, School of Metallurgy and Materials, University of Tehran, Tehran, Iran.
كليدواژه :
Stabilizer , PVP , Microencapsulation , linseed oil , In-situ polymerization , Surface morphology
عنوان كنفرانس :
The 6 th International Color & Coating Congress
چكيده فارسي :
Microcapsules containing linseed oil with melamine-urea-formaldehyde (MUF) shell was fabricated by in-situ polymerization of an oil-in-water emulsion using polyvinylpyrrolidone as a stabilizer for the dispersion properties. The effects of agitation rate, molecular weight of PVP and its concentration on microencapsulation process were investigated using SEM and optical microscopes. Chemical structure and thermal stability of microcapsules were studied using Fourier transform infrared (FTIR), differential scanning calorimetry (DSC) and thermo gravimetric analysis (TGA). By increasing the molecular weight of PVP and concentration, the microencapsulation yield and surface morphology were improved with an increase in stirring rate, surface morphology improved and the average particle sizes decreased. The prepared microcapsules provide better thermal stability than urea-formaldehyde microcapsules containing linseed oil. Mean diameter of prepared microcapsules ranged from 34 µm to 346 µm in various synthesis parameters with high linseed oil load up to 90.3%
شماره مدرك كنفرانس :
4184098
