Densities, Conductivities, and Aggregation Numbers of Aqueous Solutions of Quaternary Ammonium Surfactants with Hydroxyethyl Substituents in the Headgroups

2013 ◽  
Vol 58 (8) ◽  
pp. 2326-2338 ◽  
Author(s):  
Zhiguo Zhang ◽  
Huanhuan Wang ◽  
Weiguo Shen
Keyword(s):  
Aqueous Solutions ◽  
Quaternary Ammonium ◽  
Aggregation Numbers ◽  
Quaternary Ammonium Surfactants

scholarly journals Self-Diffusion Coefficients, Aggregation Numbers and the Range of Existence of Spherical Micelles of Oxyethylated Alkylphenols

2021 ◽  
Author(s):  
Victor P. Arkhipov ◽  
Natalia A. Kuzina ◽  
Andrei Filippov
Keyword(s):  
Aqueous Solutions ◽  
Diffusion Coefficients ◽  
The Self ◽  
Self Diffusion ◽  
Aggregation Numbers ◽  
Temperature Ranges ◽  
Spherical Micelles ◽  
Limiting Values

AbstractAggregation numbers were calculated based on measurements of the self-diffusion coefficients, the effective hydrodynamic radii of micelles and aggregates of oxyethylated alkylphenols in aqueous solutions. On the assumption that the radii of spherical micelles are equal to the lengths of fully extended neonol molecules, the limiting values of aggregation numbers corresponding to spherically shaped neonol micelles were calculated. The concentration and temperature ranges under which spherical micelles of neonols are formed were determined.

Modified Na-Montmorillonite With Quaternary Ammonium Salts: Application for Removal of Salicylic Acid From Aqueous Solutions

2015 ◽  
Vol 43 (8) ◽  
pp. 1150-1156 ◽  
Author(s):  
Zilin Meng ◽  
Fengzhu Lv ◽  
Yihe Zhang ◽  
Qian Zhang ◽  
Zhilei Zhang ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Aqueous Solutions ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts

Successful complete digestion of well lithified shale and extraction of microfossils from Devonian beds in western New York

Stratigraphy ◽  
2020 ◽  
pp. 205-212
Author(s):  
Kimberly C. Meehan ◽  
Cody Kowalski ◽  
Kimberly Bartlett ◽  
Isabelle Li ◽  
Paul Bembia
Keyword(s):  
New York ◽  
Quaternary Ammonium ◽  
Sedimentary Rock ◽  
Complete Analysis ◽  
Late Devonian ◽  
Thin Sections ◽  
Devonian Shale ◽  
Complete Digestion ◽  
Quaternary Ammonium Surfactants ◽  
Traditional Approaches

ABSTRACT: Researchers in paleontological and paleoecological sciences often need complete disaggregation of rock materials for certain lines of investigation. However, complete disaggregation of more lithified sedimentary rock is known to be problematic. A complete shale disaggregation method implementing quaternary ammonium surfactants,widely used in paleontological sciences for poorly lithified shale and mudstone, was successfully used on well lithified Devonian shale in the Appalachian Basin ofWestern New York. Over 50 Devonian gray and black shale samples were collected from multiple localities in western New York (Cashaqua, Rhinestreet, Skaneateles, Windom, and Ludlowville), coarsely crushed, and fully immersed in a quaternary ammonium surfactant until complete disaggregation was achieved (5–14 days); aliquots were run through a series of nested sieves. The sieved sediments contained hundreds of well-preserved microfossils released from the shale: ostracods, dacryoconarids, and previously unreported palymorphs, charophytes, agglutinated foraminifera, miospores, and other microspherules. These microfossils were easily found within disaggregated and sieved samples but were unrecognizable on the shale surface and destroyed in prior investigations of whole rock thin sections. In addition to more traditional approaches, inclusion of this complete rock disaggregation method may assist in a more complete analysis of material, increase our understandings of ancient basin systems and have important implications on our understanding of the paleoecology during the Late Devonian marine biotic crises.

Synthesis and Properties of Quaternary Ammonium Surfactants Based on Alkylamine, Propylene Oxide, and 2-Chloroethanol

2018 ◽  
Vol 21 (2) ◽  
pp. 247-254 ◽  
Author(s):  
Ziyafaddin H. Asadov ◽  
Gulnara A. Ahmadova ◽  
Ravan A. Rahimov ◽  
Aygul Z. Abilova ◽  
Sevda H. Zargarova ◽  
...  
Keyword(s):  
Propylene Oxide ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Surfactants
Sign in / Sign up

Export Citation Format

Share Document