Difference between the confining and bulk pressures of a phase of matter
In surface chemistry, disjoining pressure (symbol Πd) according to an IUPAC definition[1] arises from an attractive interaction between two surfaces. For two flat and parallel surfaces, the value of the disjoining pressure (i.e., the force per unit area) can be calculated as the derivative of the Gibbs energy of interaction per unit area in respect to distance (in the direction normal to that of the interacting surfaces). There is also a related concept of disjoining force, which can be viewed as disjoining pressure times the surface area of the interacting surfaces.
The concept of disjoining pressure was introduced by Derjaguin (1936) as the difference between the pressure in a region of a phase adjacent to a surface confining it, and the pressure in the bulk of this phase.[2][3]
^""Disjoining pressure". Entry in the IUPAC Compendium of Chemical Terminology ("The Gold Book"), the International Union of Pure and Applied Chemistry".
^See:
Дерягин, Б. В. and Кусаков М. М. (Derjaguin, B. V. and Kusakov, M. M.) (1936) "Свойства тонких слоев жидкостей" (The properties of thin layers of liquids), Известия Академии Наук СССР, Серия Химическая (Proceedings of the Academy of Sciences of the USSR, Chemistry series), 5 : 741-753.
Derjaguin, B. with E. Obuchov (1936) "Anomalien dünner Flussigkeitsschichten. III. Ultramikrometrische Untersuchungen der Solvathüllen und des "elementaren" Quellungsaktes" (Anomalies of thin liquid layers. III. Investigations via ultramicroscope measurements of solvation shells and of the "elementary" act of imbibition), Acta Physicochimica U.R.S.S., 5 : 1-22.
^A. Adamson, A. Gast, "Physical Chemistry of Surfaces", 6th edition, John Wiley and Sons Inc., 1997, page 247.
and 22 Related for: Disjoining pressure information
disjoining force, which can be viewed as disjoiningpressure times the surface area of the interacting surfaces. The concept of disjoiningpressure was...
capillary pressure is low, as to avoid rupturing, but sufficient for facilitating capillary functions. Capillary action Capillary number Disjoiningpressure Leverett...
website. Poudel, Sajag; Zou, An; Maroo, Shalabh C. (2022-06-15). "Disjoiningpressure driven transpiration of water in a simulated tree". Journal of Colloid...
disjoining pressure, Π {\displaystyle \Pi } is negative. Near the contact line, the disjoiningpressure dominates over the Laplace pressure, implying that...
Nanofluids perform many functions in EOR of oil fields, including pore disjoiningpressure, channel plugging, interfacial tension reduction, mobility ratio...
calculate the disjoiningpressure from this equation at any suitable position z. Alternative derivation of the same relation for disjoiningpressure involves...
pore humidities (<75%), shrinkage is caused by a decrease of the disjoiningpressure across nano-pores less than about 3 nm thick, filled by adsorbed...
This can be shown quantitatively through calculations relating to disjoiningpressure. The main repulsion mechanisms are steric (the surfactants can not...
the contact line by diffusion, which gives rise to a structural disjoiningpressure in the vicinity of the contact line. However, such enhancement is...
gas from small to large bubbles due to pressure difference. In addition, films can break under disjoiningpressure, These effects can lead to rearrangement...
Known for Derjaguin approximation DLVO theory DMT model Diffusiophoresis Disjoiningpressure Polywater Awards USSR State Prize (1990) Scientific career Fields...
walls, the corresponding quantities are expressed per unit area. The disjoiningpressure is the force per unit area and can be expressed by the derivative...
walls to help maintain a stable structure. Creates a mechanical disjoiningpressure A repulsive force which helps to maintain the cell wall thickness...
water tends to form on the solid surface due to capillary effects, disjoiningpressure, etc. Mechanical properties of ice and the substrate also of great...
micrometre), additional intermolecular forces, such as Van der Waals forces or disjoining forces, may become significant.[citation needed] Mathematically, lubrication...
territorial bodies but in simple association of persons", thus radically disjoining the nation from the territory and making of the nation a non-territorial...
disorder to voluntarily seek treatment without a comorbid disorder or pressure from family or friends. In treatment, people with SzPD are usually disinterested...
transformed substrate is itself the product) These types are not necessarily disjoined from each other, but provide a framework for understanding the differences...
its native tree cannot choose but fall to the ground, Cuba, forcibly disjoined from its own unnatural connection with Spain, and incapable of self-support...
Act reiterated the original charter. Another act of parliament in 1594 disjoined Schaw's lands of Greenock, Finnart, and Spangock from Inverkip, and assigned...
Global Information