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EFFECTS OF OIL DROPLET AND AGAR CONCENTRATION ON GEL STRENGTH AND MICROSTRUCTURE OF O/W EMULSION GEL
Author(s) -
KIM KYUNGHEE,
GOHTANI SHOICHI,
MATSUNO RYUICHI,
YAMANO YOSHIMASA
Publication year - 1999
Publication title -
journal of texture studies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.593
H-Index - 54
eISSN - 1745-4603
pISSN - 0022-4901
DOI - 10.1111/j.1745-4603.1999.tb00220.x
Subject(s) - emulsion , microstructure , materials science , agar gel , agar , chromatography , chemical engineering , composite material , chemistry , geology , engineering , microbiology and biotechnology , bacteria , biology , paleontology
The effects of oil droplet size and agar concentration on gel strength and microstructure of emulsion gels were investigated by compression test and cryoscanning electron microscope (Cryo‐SEM). At all agar concentrations, the compressive stress values of emulsion gels were lower than those of the oil‐free gels. Compressive stress and energy were significantly affected by oil droplet size and agar concentration, but compressive strain was not. SEM observation revealed that the overall volume of void spaces decreased and strand compactness increased with increasing agar concentration. Gels containing oil droplets had some void spaces between the gel network and the oil droplets. The strands of emulsion gels did not cover the oil globules completely, a phenomenon which was also observed for the gel with high agar concentration.