In situ Raman monitoring of dielectric-heating-enhanced freeze-drying under different electromagnetic wave frequencies

S. Tsubaki, T. Matsuzawa, S. Fujii, E. Suzuki, H. Kanamori, T. Hoshino, S. Hosoda, Y. Wada

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We studied the effect of dielectric heating on the enhancement of freeze-drying by electromagnetic waves (EMWs) under different frequencies: 2.45 GHz microwaves (MWs), and 27 and 200 MHz radio frequencies (RFs). The irradiation with RFs, particularly at 27 MHz, reduced the duration of freeze-drying by 67%. We further analysed the water structure by in situ Raman spectroscopy during freeze-drying under EMWs. The phase transition from ice to water occurred soon after starting irradiation by MWs at 2.45 GHz, while the ice phase was almost maintained at an RF of 27 MHz.

Original languageEnglish
Pages (from-to)9001-9005
Number of pages5
JournalRSC Advances
Volume9
Issue number16
DOIs
Publication statusPublished - 2019
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Fingerprint

Dive into the research topics of 'In situ Raman monitoring of dielectric-heating-enhanced freeze-drying under different electromagnetic wave frequencies'. Together they form a unique fingerprint.

Cite this