NDLI: Influence of cetyltrimethylammonium bromide aqueous solutions on the surface strength of quartz glass under conditions of pH variation

Content Provider	Springer Nature Link
Author	Kuchumova, V. M. Savenko, V. I. Shchukin, E. D.
Copyright Year	2007
Abstract	A mechanism of the combined influence of solutions of electrolytes with various pHs (in 10−3 N KCl solution) and cetyltrimethylammonium bromide (CTAB) cationic surfactant on the surface strength of quartz glass in a mechanical contact is studied. A similar cation-active medium is shown to embrittle quartz glass in neutral and alkaline pH ranges. The brittle strength of a near-surface layer of a material decreases owing to adsorption and electrocapillary reduction of its surface energy. The surface strength of the glass decreases to the largest extent at the CTAB critical micellization concentration. At low concentrations (10−6M), a protective effect of forming chemisorbed CTAB layers prevails that is manifested in the hydrophobization of the surface of quartz glass by CTAB molecules and its screening from direct contact with an electrolyte solution. At the CTAB concentrations that are higher than the CMC, a formed micellar structure of CTAB has a lubricating effect, leading to softer boundary conditions of a frictional contact and a decreased probability of the damage of the near-surface layer of quartz glass. In acidic electrolyte solutions, CTAB cations or molecules did not affect the surface strength of quartz glass.
Starting Page	328
Ending Page	333
Page Count	6
File Format	PDF
ISSN	1061933X
Journal	Colloid Journal
Volume Number	69
Issue Number	3
e-ISSN	16083067
Language	English
Publisher	Nauka/Interperiodica
Publisher Date	2007-01-01
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Polymer Sciences Surfaces and Interfaces, Thin Films
Content Type	Text
Resource Type	Article
Subject	Colloid and Surface Chemistry Physical and Theoretical Chemistry Surfaces and Interfaces

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