scholarly journals Synthesis of Clay Composites of Polyacrylamide and Poly-2-Hydroxyethylacrylate and Sorbtion Ability in the Case of Cetylpyridinium Bromide

2015 ◽  
Vol 16 (4) ◽  
Author(s):  
M M Beysebekov
Keyword(s):  
Ionic Strength ◽  
Hydrophobic Interactions ◽  
Aqueous Suspension ◽  
Bentonite Clay ◽  
Organic Polymer ◽  
Cetylpyridinium Bromide ◽  
Composite Gels ◽  
Environment Temperature ◽  
Surface Active ◽  
Active Substances

<p>By the three-dimensional polymerization of nonionic (polyhydroxyethylacrylate and polyacrylamide) <br />polymers and bentonite clay from Manyrak deposit (East Kazakhstan Region) and with using of process <br />preliminary intercalation of monomers in an aqueous suspension of bentonite (polymerization in situ) the <br />chemically crosslinked composite gels were synthesized. Optimal conditions of synthesis and physical-chemical properties of composition gels were established. It was shown, that yield of gel fraction increases <br />with increasing contents of bentonite clay. Insignificant adding of negative charged particles of bentonite clay <br />gives to polymer gels of nonionic type polyelectrolyte character, that comes out in decreasing of swelling <br />degree of gels under effect of ionic strength. By using physical and chemical methods of research: equilibrium <br />swelling, IR spectroscopy, scanning electron microscope (SEM), sorption-desorption, etc. were shown the <br />formation of compatible, homogeneous, swelling in water polyelectrolyte gels formed via hydrogen bonds <br />between the components of the gel, stabilized by hydrophobic interactions of the organic polymer chains. <br />The possibility of the regulation of swelling ability of the composite gels through varying of the outside and <br />inside factors as: consist of the composition, conditions of intercalation, pH of the environment, temperature <br />and ionic strength was established, that is stimulus sensitivity of gels. The sorbtion capacity of polymer-clay composites in attitude surface active substance cetylpyridinium bromide were estimated. Increasing of <br />temperature of environment and content of bentonite clay in composite promotes the process of sorbtion <br />of surface-active substances. Considerably high sorption capacity of polymer clay composition based on <br />more hydrophilic polymer – polyacrylamide was established. By the results of investigations one may, that <br />synthesized polymer clay composites after suitable investigations can be recommend as sorbents of cationic <br />surface active substances.</p>

Comparison of the reactions of ferric ions with Chromazurol S, Eriochromazurol B and Eriochromcyanine R in the presence of surface active substances and spectrophotometric determination of Fe(III)-ions with Chromazurol S-cetylpyridinium bromide system

1980 ◽  
Vol 45 (10) ◽  
pp. 2656-2669 ◽  
Author(s):  
Vlastimil Kubáň ◽  
Dagmar Gotzmannová
Keyword(s):  
Ferric Ions ◽  
Cetylpyridinium Bromide ◽  
Absorption Coefficients ◽  
Statistical Parameters ◽  
Spectrophotometric Methods ◽  
Chromazurol S ◽  
Surface Active ◽  
Active Substances ◽  
Serum Components

The spectrophotometric methods of determining Fe(III) ions with Chromazurol S, Eriochromazurol B and Eriochromcyanine R in the presence of cationic, anionic and nonionic tensides were compared using the basic optical and statistical parameters. A method was proposed and developed for the determination of Fe(III) ions using Chromazurol S in blood serum and plasma at pH 4.7-5.0 in a medium of 2 . 10-4M cetylpyridinium bromide and 0.1M pyridine buffer and at pH 6.0-6.5 in a medium of 2 . 10-3M cetylpyridinium bromide and 0.1M hexamethylenetetramine buffer with molar absorption coefficients of 1.31 . 105 and 1.40 . 105, respectively. The determination is sufficiently specific even at pathological concentrations of the other serum components.

Structure and Properties of Loaded Rubber Mixtures. VIII. Tensile Strength of Loaded Rubber Mixtures Prepared Directly from Latex

1953 ◽  
Vol 26 (3) ◽  
pp. 624-631
Author(s):  
R. Uzina ◽  
M. Dostian
Keyword(s):  
Tensile Strength ◽  
Carbon Black ◽  
Physical Properties ◽  
Filler Content ◽  
Bentonite Clay ◽  
Structure And Properties ◽  
Active Filler ◽  
Surface Active ◽  
Synthetic Latex ◽  
Active Substances

Abstract 1. The change of physical properties of loaded films of natural latex with the degree of loading is related to a change of distribution of the filler; when the filler content is small a loose structure is formed, which possesses a lower density and strength. 2. Mastication destroys the loose structure which forms in the range of small loadings, and leads to a disappearance of the minima on the corresponding concentration-strength and concentration-density curves. In synthetic-latex mixtures, there is no minimum strength or density for a particular degree of loading, since no loose structure is formed. This is still true after mastication. 4. In natural latex, bentonite clay is an active filler; channel carbon black hardly reinforces such latex mixtures. In synthetic latex (Igetex S-3), channel carbon black shows significant reinforcing properties. 5. Mastication of dried latex mixtures does not change the action of fillers. 6. Mastication of coagulated natural-latex mixtures causes channel carbon black to become an active filler; the behavior of fillers in synthetic latex mixtures is not changed by mastication. 7. The above mentioned phenomena are the result of the action of surface-active substances present in latex and adsorbed on the surface of its globules.

scholarly journals Composite Polymer-Clay Hydrogels Based on Bentonite Clay and Acrylates: Synthesis, Characterization and Swelling Capacity

2017 ◽  
Vol 19 (3) ◽  
pp. 279 ◽  
Author(s):  
Sh. Zhumagaliyeva ◽  
R. Iminovа ◽  
G. Kairalapova ◽  
М.M. Beysebekov ◽  
M.K. Beysebekov ◽  
...  
Keyword(s):  
Composite Materials ◽  
Hydrophobic Interactions ◽  
Bentonite Clay ◽  
Polymer Composition ◽  
Cross Linking ◽  
Ferrous Ions ◽  
Composite Gels ◽  
Starting Mixture ◽  
Swelling Capacity ◽  
East Kazakhstan

Clay minerals, especially montmorillonite, as well as bentonite minerals with a high content of montmorillonite, have the highest ability to adsorb various organic compounds. In the East Kazakhstan region, the Manyrak deposit has huge deposits of “pink” bentonite clay (BC) with 70% of montmorillonite, extensively studied back in the 70-80-s. Now it is successfully useful in the organo-polymer composition as a mineral filler of polymer composite materials (PCM) and finds the application as domestic sorbents for the group extraction of non-ferrous ions in the purification of industrial sewage and drinking water. This article presents the results of research of creating polymer-clay composite materials based on domestic bentonite clay with improved sorption characteristics. The polymeric matrix of the composites consists of acrylates ‒ polyacrylic and polymethacrylic acids (PAA and PMAA). BC-PAA and BC-PMAA gels were obtained by radical polymerization “in situ” using the intercalation method (and wi thout it). Preliminary intercalation forms more homogeneous and interconnected composite gels. An increase in the content of the clay component and the cross-linking agent in the starting mixture results in a higher cross-linking rate and compaction of the composite gels. The behavior of the swelling of gels under the influence of temperature, pH, ionic strength indicates their polyelectrolyte character with dominant hydrogen bonds and partial hydrophobic interactions (the latter is improved in the case of BC-PMAA). The preparation of composite gels based on local BC and PAA and PMAA expands the range of composite materials and can be used as sorbents for wastewater treatment.

Surface Active Substances in the Chinchilla Tubotympanum: a Biochemical Study

1991 ◽  
Vol 111 (3) ◽  
pp. 1097-1104
Author(s):  
James Coticchia ◽  
Frederick Heiselman ◽  
Raouf Gharbo ◽  
Thomas Demaria ◽  
David Lim
Keyword(s):  
Biochemical Study ◽  
Surface Active ◽  
Active Substances

Influence of surface active substances on AKD sizing

2005 ◽  
Vol 20 (2) ◽  
pp. 253-258 ◽  
Author(s):  
Elisa Zeno ◽  
Bruno Carré ◽  
Evelyne Mauret
Keyword(s):  
Surface Active ◽  
Active Substances

scholarly journals The possible role of the Surface Active Substances (SAS) in the airborne transmission of SARS-CoV-2

2021 ◽  
pp. 111215
Author(s):  
Irena Ciglenečki ◽  
Palma Orlović-Leko ◽  
Kristijan Vidović ◽  
Viša Tasić
Keyword(s):  
Airborne Transmission ◽  
Surface Active ◽  
Active Substances

The kinetics of the penetration of some representative anthelmintics and related compounds into Ascaris lumbricoides var. suis

Parasitology ◽  
1949 ◽  
Vol 39 (3-4) ◽  
pp. 281-290 ◽  
Author(s):  
A. R. Trim
Keyword(s):  
Ascaris Lumbricoides ◽  
Homogeneous Layer ◽  
Outermost Layer ◽  
Basic Group ◽  
Rate Of Penetration ◽  
Surface Active ◽  
Main Barrier ◽  
Kinetics Of ◽  
Related Compounds ◽  
Active Substances

1. The rate of penetration of some representative drugs into Ascaris lumbricoides var. suis has been measured.2. The series of 4-n-alkyl resorcinols shows a typical homologous series effect.3. l-Nicotine penetrates relatively slowly.4. Its rate of penetration is greatly influenced by the extent of dissociation of its methyl pyrrolidine basic group.5. The rate of penetration of nicotine is greatly accelerated in the presence of some surface active substances.6. Chloroform is the most rapidly penetrating substance studied, and its penetration is not significantly influenced by the presence of proteins, carbohydrates and fats and their products of digestion.7. An analysis of the experimental results shows that the outermost layer of the cuticle of Ascaris is probably the main barrier to penetration. It behaves as if it were a thin; homogeneous layer of lipoid.8. The significance of these results in the study of anthelmintics is assessed.

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