Specific surface area of strongly swelling polymer hydrogels for agricultureстатья

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Дата последнего поиска статьи во внешних источниках: 13 мая 2020 г.

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[1] Specific surface area of strongly swelling polymer hydrogels for agriculture / A. S. Bashina, A. V. Smagin, N. B. Sadovnikova et al. // IOP Conference Series: Earth and Environmental Science. — 2019. — Vol. 368. — P. 012006. The study is the first attempt in soil physics to estimate the effective specific surface area of strongly swelling polymer hydrogels as soil conditioners of a new generation. Along with the standard assessment of water vapor desorption isotherms by the BET method, a new method for determining the specific surface area deduced from the slope of water retention curves was used. Water desorption isotherms and water retention curves were obtained by a dynamic sorption equilibrium method and by a new method of thermodesorption. The specific surface area values of synthetic polymer hydrogels ranged from 468 to 1029 m2/g. An innovative Russian product VM-P with amphiphilic filler in the form of dispersed peat had the maximum specific surface area among all studied types of hydrogels. Water absorption properties and dispersion of gels have a hysteresis caused, presumably, by the dynamics of dispersion in the cycles of wetting-drying. [ DOI ]

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