scholarly journals Adsorption Properties of Soft Hydrophobically Functionalized PSS/MA Polyelectrolytes

2021 ◽  
Vol 5 (1) ◽  
pp. 3
Author(s):  
Ewelina Jarek ◽  
Zofia Krasińska-Krawet ◽  
Tomasz Kruk ◽  
Łukasz Lamch ◽  
Sylwia Ronka ◽  
...  
Keyword(s):  
Solid Surface ◽  
Alkyl Chain ◽  
Water Structure ◽  
Building Blocks ◽  
Adsorption Properties ◽  
Attenuated Total Reflection ◽  
Side Chains ◽  
Adsorption Method ◽  
Present Contribution ◽  
Grafting Ratio

We investigated the adsorption properties of the newly synthesized, hydrophobically functionalized polyelectrolyte (HF-PE), poly(4-styrenesulfonic-co-maleic acid) copolymer (PSS/MA). The hydrophobic alkyl side chains (C12 or C16) were incorporated into the polyelectrolyte backbone via the labile amid linker to obtain the soft HF-PE product with the assumed amount of 15% and 40% degree of grafting for every length of the alkyl chain, i.e., PSS/MA-g-C12NH2 (15% or 40%) as well as PSS/MA-g-C16NH2 (15% or 40%). In the present contribution, we determined both the effect of grafting density and the length of alkyl chain on adsorption at water/air and water/decane interfaces, as well as on top of the polyelectrolyte multilayer (PEM) deposited on a solid surface. The dependence of the interfacial tension on copolymer concentration was investigated by the pendant drop method, while the adsorption at solid surface coated by poly(diallyldimethylammonium chloride)/poly(styrene sulphonate) PEM by the quartz crystal microbalance with dissipation (QCM-D), attenuated total reflection Fourier transform infrared spectroscopy (FTIR-ATR) and contact angle analysis. We found that surface activity of the hydrophobized copolymer was practically independent of the grafting ratio for C16 side chains, whereas, for C12, the copolymer with a lower grafting ratio seemed to be more surface active. The results of QCM-D and FTIR-ATR experiments confirmed the adsorption of hydrophobized copolymer at PEM along with the modification of water structure at the interface. Finally, it can be concluded that the hydrophobically modified PSS/MA can be successfully applied either as the efficacious emulsifier for the formation of (nano)emulsions for further active substances encapsulation using the sequential adsorption method or as one of the convenient building blocks for the surface modification materials.

scholarly journals Fluorinated Iron(ii) clathrochelate units in metalorganic based copolymers: improved porosity, iodine uptake, and dye adsorption properties

RSC Advances ◽  
2021 ◽  
Vol 11 (25) ◽  
pp. 14986-14995
Author(s):  
Suchetha Shetty ◽  
Noorullah Baig ◽  
Atikur Hassan ◽  
Saleh Al-Mousawi ◽  
Neeladri Das ◽  
...  
Keyword(s):  
Dye Adsorption ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Building Blocks ◽  
Adsorption Properties ◽  
Iodine Uptake ◽  
Cross Coupling Reaction ◽  
Palladium Catalyzed

We report the synthesis of metalorganic copolymers made from the palladium catalyzed Sonogashira cross-coupling reaction between various iron(ii) clathrochelate building blocks with diethynyl–triptycene and fluorene derivatives.

scholarly journals Study of the Influence of Alkyl Chain Cation-Solvent Interactions on Water Structure in 1,3-Butanediol-Water Mixture by Apparent Molar Volume Data

2011 ◽  
Vol 8 (3) ◽  
pp. 1323-1329 ◽  
Author(s):  
R. N. Pathak ◽  
Indu Saxena ◽  
Archna ◽  
Anoop Kumar Mishra
Keyword(s):  
Apparent Molar Volume ◽  
Alkyl Chain ◽  
Water Structure ◽  
Apparent Molar Volumes ◽  
Solvent Mixtures ◽  
Water Mixture ◽  
Volume Data ◽  
Molar Volumes ◽  
Solvent Interactions ◽  
Magnetic Float

The densities of 1,3-butanediol-water mixtures and some tetraalkylammonium iodide salt solutions in these solvent mixtures at different concentrations (0.02 M-0.14 M) have been determined at 298.15 K using magnetic float densitometer technique. Then apparent molar volumes ΦVof the electrolytes in above solvent mixtures were calculated. The apparent molar volumes of transfer ∆ΦV° (tr) were also calculated and the ion-ion / ion- solvent interactions are then discussed on the basis of changes in the Masson's slope and apparent molar volumes of transfer data.

scholarly journals Water Structure at the Interface of Alcohol Monolayers as Predicted by Computational Vibrational Sum-Frequency Generation Spectroscopy

2018 ◽  
Author(s):  
Daniel R. Moberg ◽  
Qin Li ◽  
Sandeep K. Reddy ◽  
Francesco Paesani
Keyword(s):  
Alkyl Chain ◽  
Force Fields ◽  
Water Structure ◽  
Sum Frequency Generation ◽  
Interfacial Water ◽  
Sum Frequency ◽  
Frequency Generation ◽  
Computational Spectroscopy ◽  
Dynamics Simulations ◽  
Alcohol Monolayers

<div> <div> <div> <p>In this study, we investigate the structure of water at the interface of three long-chain alcohol monolayers differing in alkyl chain length through molecular dynamics simulations combined with modeling of vibrational sum-frequency generation (vSFG) spectra. The effects of alkyl chain parity on interfacial water is examined through extensive analysis of structural properties, hydrogen bonding motifs, and spectral features. Besides providing molecular-level insights into the structure of interfacial water, this study also demonstrates that, by enabling direct comparisons with experimental vSFG spectra, computational spectroscopy may be used to test and validate force fields commonly used in biomolecular simulations. The results presented here can thus serve as benchmarks for both further investigations to characterize ice nucleation induced by alcohol monolayers and refinement of popular biomolecular force fields. </p> </div> </div> </div>

scholarly journals Acrylamides with hydrolytically labile carbonate ester side chains as versatile building blocks for well-defined block copolymer micelles via RAFT polymerization

2017 ◽  
Vol 8 (42) ◽  
pp. 6544-6557 ◽  
Author(s):  
Sabah Kasmi ◽  
Benoit Louage ◽  
Lutz Nuhn ◽  
Glenn Verstraete ◽  
Simon Van Herck ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Raft Polymerization ◽  
Building Blocks ◽  
Side Chains ◽  
Hydrophobic Modification ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles

Hydrophobic modification of N-(2-hydroxyethyl)acrylamide yields a class of building blocks that is attractive for biomaterial synthesis.

3-Alkylated (R)-2,3-Dihydroxyalkyl p-Toluenesulfonates - homochiral building blocks for modified steroid side chains

1990 ◽  
Vol 332 (2) ◽  
pp. 191-197 ◽  
Author(s):  
Eberhard Schrötter ◽  
Tran Thanh Luong ◽  
Hans Schick
Keyword(s):  
Building Blocks ◽  
Side Chains

Determination of layer-charge density of expandable 2:1 clay minerals in soils and loess sediments using the alkylammonium method

Clay Minerals ◽  
1985 ◽  
Vol 20 (3) ◽  
pp. 291-300 ◽  
Author(s):  
G. Rühlicke ◽  
E. A. Niederbudde
Keyword(s):  
Charge Density ◽  
Clay Minerals ◽  
Adsorption Properties ◽  
Layer Charge ◽  
Basal Spacing ◽  
Adsorption Method ◽  
Resolution Electron ◽  
Fine Clay ◽  
High Resolution Electron Micrographs

AbstractThe alkylammonium adsorption method for the determination of layer-charge density was slightly modified and applied to mixtures of expandable clay minerals (i.e. predominantly 18 Å minerals after glycerol sorption) from two loess samples and two soils (Haplaquept and Aquentic Chromudert) having different K-adsorption properties. The layer-charge density of the so-called 18 Å minerals from these sediments and soil samples varied between −0·23 and −0·85 per formula unit, which suggested the presence of different amounts of vermiculite within the 18 Å minerals. The amounts of these vermiculites were related to K-fixing and K-buffering properties of the different samples. High-resolution electron micrographs of vermiculites saturated with tetradecylammonium exhibited a basal spacing of 25 Å. It was confirmed, that the alkylammonium ions in the interlayers of the vermiculites formed a paraffin-type structure. In the fine clay from the loess samples an interstratification of vermiculite and illitic layers was observed.

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