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Remarkable Antiagglomeration Effect of a Yeast Biosurfactant, Diacylmannosylerythritol, on Ice‐Water Slurry for Cold Thermal Storage
Author(s) -
Kitamoto Dai,
Yanagishita Hiroshi,
Endo Akira,
Nakaiwa Masaru,
Nakane Takashi,
Akiya Takaji
Publication year - 2001
Publication title -
biotechnology progress
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.572
H-Index - 129
eISSN - 1520-6033
pISSN - 8756-7938
DOI - 10.1021/bp000159f
Subject(s) - slurry , pulmonary surfactant , chemistry , adsorption , chemical engineering , yeast , cationic polymerization , thermal energy storage , chromatography , materials science , organic chemistry , biochemistry , biology , composite material , ecology , engineering
Antiagglomeration effects of different surfactants on ice slurry formation were examined to improve the efficiency of an ice‐water slurry system to be used for cold thermal storage. Among the chemical surfactants tested, a nonionic surfactant, poly(oxyethylene) sorbitan dioleate, was found to show a greater antiagglomeration effect on the slurry than anionic, cationic, or amphoteric surfactants. More interestingly, diacylmannosylerythritol, a glycolipid biosurfactant produced by a yeast strain of Candida antarctica , exhibited a remarkable effect on the slurry, attaining a high ice packing factor (35%) for 8 h at a biosurfactant concentration of 10 mg/L. These nonionic glycolipid surfactants are likely to effectively adsorb on the ice surface in a highly regulated manner to suppress the agglomeration or growth of the ice particles. This is the first report on the utilization of biosurfactant for thermal energy storage, which may significantly expand the commercial applications of the highly environmentally friendly slurry system.