Premium
Cryoprotective Effect of Dimethyl Sulfoxide (DMSO) on Soil Structure During Freeze‐Drying
Author(s) -
Keng J. C. W.,
Morita H.,
Ramia N. T.
Publication year - 1985
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1985.03615995004900020002x
Subject(s) - shrinkage , dimethyl sulfoxide , freeze drying , scanning electron microscope , compaction , chemistry , soil structure , mercury (programming language) , mineralogy , chemical engineering , materials science , soil water , composite material , chromatography , soil science , geology , organic chemistry , engineering , computer science , programming language
The effect of the cryoprotective property of dimethyl sulfoxide (DMSO) on soil pore structure during freeze‐drying was examined in the laboratory. Undisturbed heavy clay soil cores (75 mm high and 75 mm in diameter) were saturated with 0%, 10%, 28% and 35% H 2 O‐DMSO solution before freeze‐drying. Shrinkage measurements, mercury intrusion determinations, and scanning electron microscope (SEM) examinations were performed to study the effects of DMSO on soil structure. Shrinkage results suggest that the shape of soil samples has the greatest effect on directional shrinkage. Freeze‐drying caused thermal cracks which belies the true volume shrinkage. Mercury intrusion data and SEM photographs indicate that DMSO treatments alter the pore size distributions. The most interesting discovery in this experiment was, for this particular soil, that pores in the range of 10 nm to 10 2 nm seem most susceptible to compaction caused by ice crystal formation.