Journal
APPLIED SCIENCES-BASEL
Volume 12, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/app12041800
Keywords
carboxymethylcellulose; microencapsulation; benzotriazole; spray drying; release studies
Categories
Funding
- project PVE-CAPES [88881.064969/2014-01]
- CAPES
- CNPq [303126/2019-1]
- Electron Microscopy Center of UFPR (CME-UFPR)
- Portugal 2020 through the European Regional Development Fund (ERDF) [POCI-01-0145-FEDER-016597/PTDC/CTMBIO/2170/2014]
- Portugal 2020 through the European Regional Development Fund (ERDF) (FCT) [UID/CTM/50011/2013]
- FCT/MEC
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Sodium carboxymethylcellulose (CMC-Na) microparticles containing corrosion inhibitor benzotriazole (BTA) were successfully prepared using spray drying processing parameters. The study found that the inlet temperature and spray flow rate significantly affected the release properties and process yields of the microparticles.
Sodium carboxymethylcellulose (CMC-Na) microparticles, containing corrosion inhibitor benzotriazole (BTA), were prepared using different spray drying processing parameters, with the purpose of future application in protective coatings for the delivery of corrosion inhibitors. The effects of the processing parameters, such as inlet temperature and spray flow rate, are discussed herein. The biopolymeric CMC-Na microparticles obtained were characterized morphologically by SEM and TEM, and their release profile studied by UV-Vis. The results show that the prepared microparticles (microspheres) were homogeneous, spherically shaped and of a matrix-type nature. Additionally, it was observed that the inlet temperature and spray flow rate significantly influenced the release profiles and process yields. From the different process parameters tested, it was found that the best conditions to achieve higher process yields, higher encapsulation efficiencies and better release properties, were an inlet temperature of 170 degrees C, a pump rate of 2.5 mL/min, and a drying air-flow rate of 440 L/h.
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