| 单词 |
non-ionic |
| 释义 |
non-iˈonic, a. and n.
[non- 3.]
A. adj. Not ionic; spec. (esp. of a detergent) not dissociating into ions in aqueous solution.
1943Chemical Industries LII. 327/1 Non-ionic surface active agents, as their name implies, are not ionizable and owe their effectiveness to a proper balance between certain hydrophilic (polar) and lyophilic (non-polar) groups in their molecules. 1959Spectator 4 Sept. 294/1 Together with the nonionic ‘Nonidet’ products, they have scores of applications throughout industry both for cleaning and maintenance. 1963A. J. Hall Textile Sci. vi. 296 Surface active agents or surfactants can be usefully classified into three main groups—anion-active, non-ionic, and cation-active. 1964M. Hynes Med. Bacteriol. (ed. 8) vii. 90 It depends on such forces as attraction between polar non-ionic groups..and van der Waal[s] attraction. 1965Phillips & Williams Inorg. Chem. I. v. 171 The difference between the equilibrium lattice energies U and Ui is seen to be approximately equal to the additional non-ionic binding energies.
B. n. A non-ionic substance or detergent.
1952Mod. Sanit. & Build. Maint. IV. 63/1 Considerable interest has been shown as to just what happens when iodine is dissolved in nonionics... It has been observed that nonionics render iodine soluble in aqueous solutions providing the amount of iodine does not exceed 25% based on the nonionic. 1972Materials & Technol. V. x. 308 In several of the different classes of these non-ionics, it is possible to obtain products ranging from completely oil-soluble to completely water-soluble. |
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