Extraction and Microencapsulation of Polyphenols from Orthosiphon Stamineus Leaves

• Main Authors: Sook, Fun Pang, Mei, Zhu Lau, M. M., Yusoff, Jolius, Gimbun
• Format: Article
• Language: English; English
• Published: Faculty Mechanical Engineering, UMP 2014
• Subjects: TP Chemical technology
• Online Access: http://umpir.ump.edu.my/id/eprint/5692/1/CHEM-005.pdf; http://umpir.ump.edu.my/id/eprint/5692/4/fkksa-2014-pang-extraction%20and%20microencapsulation.pdf; http://umpir.ump.edu.my/id/eprint/5692/; http://dx.doi.org/10.15282/jmes.7.2014.2.0100

This paper presents an extraction and microencapsulation study of polyphenols obtained from Orthosiphon stamineus leaves. Extraction using aqueous solvent enabled a simultaneous extraction of both hydrophilic and lipophilic phenolic compounds. Higher solid concentration leads to higher solution viscosity, bigger particle size, lower moisture content and a less dented surface, which may improve particle flowability. The results suggest that eupatorin and rosmarinic acid are more susceptible to thermal degradation than sinensetin during spray drying. The formulation of 1:9 whey protein to maltodextrin ratio was also found to be more effective, with 86.7% total flavonoids retention compared to other formulations, viz, 1:1 and 9:1.