SU1689796A1 - Method of determination of wetting selectivity of finely dispersed materials - Google Patents
Method of determination of wetting selectivity of finely dispersed materials Download PDFInfo
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- SU1689796A1 SU1689796A1 SU894669774A SU4669774A SU1689796A1 SU 1689796 A1 SU1689796 A1 SU 1689796A1 SU 894669774 A SU894669774 A SU 894669774A SU 4669774 A SU4669774 A SU 4669774A SU 1689796 A1 SU1689796 A1 SU 1689796A1
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- selectivity
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- finely dispersed
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Abstract
Изобретение относитс х контрольно- измерительной технике, а именно к способам определени смачиваемости поверхности твердых тел, и может быть использовано в тонкой химической технологии . Цель изобретени - повышение точности определени избирательности смачивани . Дл этого исследуемый порошок поочередно привод т в контакт с парами пол рной и апол рной жидкост ми, измер ют константы адсорбции паров этих жидкостей на поверхности порошка, а избирательность смачивани оценивают по отношению логарифмов соответствующих констант адсорбции.The invention relates to instrumentation engineering, in particular, to methods for determining the wettability of the surface of solids, and can be used in fine chemical technology. The purpose of the invention is to improve the accuracy of determination of wetting selectivity. To this end, the test powder is alternately brought into contact with polar and apolar vapors, the adsorption constants of the vapors of these liquids on the powder surface are measured, and the wetting selectivity is evaluated by the ratio of the logarithms of the respective adsorption constants.
Description
сл Сsl C
Изобретение относитс к контрольно- измерительной технике, а именно к способам определени смачиваемости поверхности твердых тел, и может быть использовано в тонкой химической технологии дл определени избирательности смачивани тонкодисперсных материалов, а также дл контрол за изменением свойств поверхности материалов при их контакте с малыми количествами паров органических веществ.The invention relates to measuring and control technology, and specifically to methods for determining the wettability of the surface of solids, and can be used in fine chemical technology to determine the wetting selectivity of fine materials, as well as to control changes in the surface properties of materials when they are in contact with small quantities of organic vapor. substances.
Целью изобретени вл етс повышение точности определени .The aim of the invention is to improve the accuracy of determination.
Пример. Порошок Si02 с размером частиц 0,5-5,0 мкм загружают в две адсорбционные колонки высотой 0,1 м и диаметром 0,03 м. Через первую колонку пропускаютс пары воды, предварительноExample. SiO2 powder with a particle size of 0.5-5.0 µm is loaded into two adsorption columns with a height of 0.1 m and a diameter of 0.03 m. Water vapor is passed through the first column, previously
нагретые до 170°С, через вторую - пары декана при той же температуре. По разнице давлений паров на входе и на выходе из колонок рассчитывают величины удерживаемых (адсорбированных) количеств паров воды и декана. Величины удерживаемых объемов паров измер ют при различных исходных давлени х. На основании полученных экспериментальных результатов стро т изотермы адсорбции и по тангенсу угла наклона линейной части изотермы (при малых степен х заполнени поверхности) определ ют константы адсорбции Генри.heated to 170 ° C, through the second - dean vapors at the same temperature. From the difference in vapor pressure at the inlet and at the outlet from the columns, the values of retained (adsorbed) quantities of water vapor and decane are calculated. The magnitude of vapor retention is measured at different initial pressures. Based on the obtained experimental results, adsorption isotherms are constructed and the Henry adsorption constants are determined from the slope of the linear part of the isotherm (at low degrees of surface filling).
Избирательность смачивани рассчитывают с помощью выражени The wetting selectivity is calculated using
О 00 Ю VJ Ю ОO 00 S VJ S O
рR
In Кр (В) In Кр (О)In Cr (V) In Cr (O)
где /J - избирательность смачивани ;where / J is the wetting selectivity;
Кр(В) - константа адсорбции паров воды:Кр (В) - constant of adsorption of water vapor:
Кр(0) - константа адсорбции паров декана .Кр (0) - constant of adsorption of dean vapors.
Дл порошка SI02 получено значение ft 0,93 с погрешностью 4%, котора в 8 раз меньше погрешности прототипа.The value of ft 0.93 was obtained for powder SI02 with an error of 4%, which is 8 times less than the error of the prototype.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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SU894669774A SU1689796A1 (en) | 1989-03-30 | 1989-03-30 | Method of determination of wetting selectivity of finely dispersed materials |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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SU894669774A SU1689796A1 (en) | 1989-03-30 | 1989-03-30 | Method of determination of wetting selectivity of finely dispersed materials |
Publications (1)
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SU1689796A1 true SU1689796A1 (en) | 1991-11-07 |
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SU894669774A SU1689796A1 (en) | 1989-03-30 | 1989-03-30 | Method of determination of wetting selectivity of finely dispersed materials |
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SU (1) | SU1689796A1 (en) |
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1989
- 1989-03-30 SU SU894669774A patent/SU1689796A1/en active
Non-Patent Citations (1)
Title |
---|
Сумм Б.Д., Горюнов Ю.В. Физико-химические основы смачивани и растекани . - М.: Хими , 1976, с. 168-174. Ребиндер П.А. Поверхностно-активные вещества. - М.: Хими , 1961, с. 85. * |
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