Micronization of hydrothermally extracted phytochemical compounds from Gracilaria sp using electrospraying

Dwi Setyorini, Siti Machmudah, Sugeng Winardi, Wahyudiono Wahyudiono, Motonobu Goto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


The hydrothermal extraction was carried out in a semi-batch extractor at a temperature of 160 °C, pressure of 7 MPa, and a water flow rate of 1 mL/min. Electrospraying was conducted at various voltages of 12, 14, and 16 kV, various distances between tip and collector of 6, 8 and 10 cm, precursor solution flow rate of 0.05 mL/h, and PVP concentrations of 6 and 8%. Particles obtained from electrospraying process were analyzed by SEM, FTIR, and spectrophotometer. The antioxidant efficiency (AE) of the particles was also examined. Based on the results, the morphology of particles was spherical with diameter less than 3 µm. The highest value of AE was 0.1058 min-1, which indicated that Gracilaria sp extract in the particles produced by electrospraying has good antioxidant activity. In the FTIR analysis, carrageenan and flavonoids were contained in the particles. The result indicated that hydrothermal extraction followed by electrospraying process could be one alternative process for obtaining the best phytochemical particles.

Original languageEnglish
Title of host publicationSymposium of Materials Science and Chemistry II
EditorsTutik Dwi Wahyuningsih, Roto Roto, Dwi Siswanta, Rohana Adnan, Laurent Commeiras, Kuwat Triyana, Kuwat Triyana, Indriana Kartini, Julius Motuzas
PublisherTrans Tech Publications Ltd
Number of pages7
ISBN (Print)9783035716139
Publication statusPublished - 2020
Externally publishedYes
Event5th International Conference on Science and Technology, ICST 2019 - Yogyakarta, Indonesia
Duration: 2019 Jul 302019 Jul 31

Publication series

NameKey Engineering Materials
Volume840 KEM
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795


Conference5th International Conference on Science and Technology, ICST 2019


  • Electrospraying
  • Glacilaria sp
  • Hydrothermal
  • Micronization
  • Phytochemical

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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