Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Hydrophobically Modified Gelatin Particles for Production of Liquid Marbles

Takayuki Takei
* ORCID logo ,
Rio Tomimatsu
,
Takanori Matsumoto
,
Kamalalayam Rajan Sreejith
,
Nam-Trung Nguyen
ORCID logo ,
Masahiro Yoshida
Version 1 : Received: 18 October 2022 / Approved: 19 October 2022 / Online: 19 October 2022 (10:14:43 CEST)

A peer-reviewed article of this Preprint also exists.

Takei, T.; Tomimatsu, R.; Matsumoto, T.; Sreejith, K.R.; Nguyen, N.-T.; Yoshida, M. Hydrophobically Modified Gelatin Particles for Production of Liquid Marbles. Polymers 2022, 14, 4849. Takei, T.; Tomimatsu, R.; Matsumoto, T.; Sreejith, K.R.; Nguyen, N.-T.; Yoshida, M. Hydrophobically Modified Gelatin Particles for Production of Liquid Marbles. Polymers 2022, 14, 4849.

Abstract

The unique properties and morphology of liquid marbles (LMs) make them potentially useful for various applications. Non-edible hydrophobic organic polymer particles are widely used to prepare LMs. It is necessary to increase the variety of LM particles to extend their use into food and pharmaceuticals. Herein, we focus on hydrophobically modified gelatin (HMG) as a base material for the particles. The surface tension of HMG decreased as the length of alkyl chains incorporated into the gelatin and the degree of substitution (DS) of the alkyl chains increased. HMG with a surface tension of less than 37.5 mN/m (determined using equations based on the Young-Dupré equation and Kaelble-Uy theory) successfully formed LMs of water. The minimum surface tension of a liquid in which it was possible to form LMs using HMG particles was approximately 53 mN/m. We also showed that the liquid-over-solid spreading coefficient S_(L/S) is a potential new factor for predicting if particles can form LMs. The HMG particles and the new system for predicting LM formation could expand the use of LMs in food and pharmaceuticals.

Keywords

liquid marble; gelatin; spreading coefficient; surface tension

Subject

Chemistry and Materials Science, Surfaces, Coatings and Films

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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