翻訳と辞書 Words near each other ・ Sestra River ・ Sestra River (Leningrad Oblast) ・ Sestra River (Moscow Oblast) ・ Sestre ・ Sestre (drag act) ・ Sesser Opera House ・ Sesser, Illinois ・ Sessera ・ Sessera Valley ・ Sesshin ・ Sessho-seki ・ Sesshu Foster ・ Sesshō and Kampaku ・ Sesshū Tōyō ・ Sessi D'Almeida ・ Sessile drop technique ・ Sessile serrated adenoma ・ Sessilee Lopez ・ Sessilia ・ Sessilifolia ・ Sessilina ・ Sessility ・ Sessility (botany) ・ Sessility (limnology) ・ Sessility (zoology) ・ Sessiluncus ・ Session ・ Session (computer science) ・ Session (parliamentary procedure) ・ Session (Presbyterianism) Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Sessile drop technique ： ウィキペディア英語版 Sessile drop technique The Sessile Drop Technique is a method used for the characterization of solid surface energies, and in some cases, aspects of liquid surface energies. The main premise of the method is that by placing a droplet of liquid with a known surface energy, the shape of the drop, specifically the contact angle, and the known surface energy of the liquid are the parameters which can be used to calculate the surface energy of the solid sample. The liquid used for such experiments is referred to as the probe liquid, and the use of several different probe liquids is required. ==Probe liquid== The surface energy is measured in units of Joules per area, which is equivalent in the case of liquids to surface tension, measured in newtons per meter. The overall surface tension/energy of a liquid can be acquired through various methods using a tensiometer or using the pendent drop technique and Maximum bubble pressure method. The interface tension at the interface of the probe liquid and the solid surface can additionally be viewed as being the result of different types of intermolecular forces. As such, surface energies can be subdivided according to the various interactions that cause them, such as the surface energy due to dispersive (van der Waals) forces, hydrogen bonding, polar interactions, acid/base interactions, etc. It is often useful for the sessile drop technique to use liquids that are known to be incapable of some of those interactions (see table 1). For example, the surface tension of all straight alkanes is said to be entirely dispersive, and all of the other components are zero. This is algebraically useful, as it eliminates a variable in certain cases, and makes these liquids essential testing materials. The overall surface energy, both for a solid and a liquid, is assumed traditionally to simply be the sum of the components considered. For example, the equation describing the subdivision of surface energy into the contributions of dispersive interactions and polar interactions would be: $\backslash sigma\backslash$S = $\backslash sigma\backslash$SD + $\backslash sigma\backslash$SP $\backslash sigma\backslash$L = $\backslash sigma\backslash$LD + $\backslash sigma\backslash$LP Where $\backslash sigma\backslash$S is the total surface energy of the solid, $\backslash sigma\backslash$SD and $\backslash sigma\backslash$SP are respectively the dispersive and polar components of the solid surface energy, $\backslash sigma\backslash$L is the total surface tension/surface energy of the liquid, and $\backslash sigma\backslash$LD and $\backslash sigma\backslash$LP are respectively the dispersive and polar components of the surface tension. In addition to the tensiometer and pendant drop techniques, the sessile drop technique can be used in some cases to separate the known total surface energy of a liquid into its components. This is done by reversing the above idea with the introduction of a reference solid surface that is assumed to be incapable of polar interactions, such as Polytetrafluoroethylene (PTFE).〔Christopher Rullison, "So You Want to Measure Surface Energy?". Kruss Laboratories technical memo.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sessile drop technique」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.