The effect of anionic polyacrylamide molecular
The effect of anionic polyacrylamide molecular conformation and configuration on flocculation effectiveness. Authors. J. A. Caskey, Corresponding author. Department of Chemical Engineering, Rose-Hulman Institute of Technology, 5500 Wabash Avenue, Terre Haute, IN 47803;
The effect of polyacrylamide charge density and molecular. The effects of the surface charge and molecular weight of anionic and cationic polyacrylamide (PAM) on the surface chemistry, settling rates, floc sizes and sediment bed compactness of kaolinite suspensions has been investigated at pH 7.
Molecular dynamics simulations of the conformation
The behavior of a single HPAM chain in concentrated aqueous salt solutions was studied by molecular dynamics simulations with the Gromacs software package version 5.0.2 (Berendsen et al., 1995) at pH 7 and 300 K.For the HPAM chain, we used the AMBER 99sb force field (Cornell et al., 1995, Sorin and Pande, 2005), which supports most common biomolecules.
Get Price
Anionic Polyacrylamide Polymers Effect on Rheological
Anionic Polyacrylamide Polymers Effect on Rheological Behavior of Sodium‐Montmorillonite Suspensions. Three anionic PAMs of three molecular weights (MWs) The polymer conformation factor has a greater impact on clay structure stabilization in suspension than the electrostatic repulsion effect. The clay structure stability was increased
Get Price
Impact of anionic polyacrylamide on stability and surface
The stability mechanism and thermal properties of the system alumina–anionic polyacrylamide (PAM) was studied. The polymer’s adsorption properties in dependence on the following parameters solution pH (in the range 3–9), temperature (in the range 15–35 °C), and carboxyl groups’ content in the PAM chains (in the range 5–30 %) were examined.
Get Price
The effect of cations on the activity of anionic
Request PDF | The effect of cations on the activity of anionic polyacrylamide flocculant solutions | The conformation of acrylamide/acrylate copolymers' aqueous solutions is known to be affected
Get Price
Effect of cationic surfactants on the conformation
Molecular Dynamics Simulations of Adsorption of Poly(acrylic acid) and Poly(methacrylic acid) on Dodecyltrimethylammonium Chloride Micelle in Water: Effect of Charge Density. The Journal of Physical Chemistry B 2015 , 119 (38) , 12526-12539.
Get Price
Impact of anionic polyacrylamide on stability and surface
The stability mechanism and thermal properties of the system alumina–anionic polyacrylamide (PAM) was studied. The polymer’s adsorption properties in dependence on the following parameters solution pH (in the range 3–9), temperature (in the range 15–35 °C), and carboxyl groups’ content in the PAM chains (in the range 5–30 %) were examined.
Get Price
effects of anionic polyacrylamide on carbonation the
Effects of Anionic Polyacrylamide on Carbonation for the . The effects of different types of anionic polyacrylamide (PAM) on crystallization behavior of precipitated calcium carbonate (PCC) prepared via carbonation using calcium hydroxide and carbon dioxide gas. The percentage of aragonite phase increased higher reaction temperature.
Get Price
Anionic Polyacrylamide Polymers Effect on Rheological
Anionic Polyacrylamide Polymers Effect on Rheological Behavior of Sodium-Montmorillonite Suspensions Abstract Polyacrylamide (PAM) is a long‐chain synthetic polymer that acts as a strengthening agent, binding clay particles together.
Get Price
Polyacrylamide and biopolymer effects on flocculation
Polyacrylamide and biopolymer effects on flocculation, aggregate stability, and water seepage in a silt loam These results suggested that the biopolymer's bulkier molecular conformation limited the extension and flexibility of the molecule in solution, compared to PAM. Water soluble anionic polyacrylamide (PAM), a linear polymer syn-
Get Price
Soil Science Society of America Journal Abstract
The polymer conformation factor has a greater impact on clay structure stabilization in suspension than the electrostatic repulsion effect. The clay structure stability was increased with increasing polymer electrostatic negative charge for similar molecular weights. Please view the pdf by using the Full Text link under 'View' to the left.
Get Price
Nanostructured Dextran-Graft-Polyacrylamide Flocculants
Branched nanostructured copolymers dextran-g-polyacrylamide (D-g-PAA) in uncharged and anionic form were synthesized, characterized, and tested for flocculation in comparison with linear PAA. The polymers differed in the conformation of grafted polyacrylamide chains determining the molecular compactness.
Get Price
Molecular Conformation-Controlled Vesicle/Micelle
Transitions in the Molecular Configuration and Aggregates for Mixtures of a Star-Shaped Hexameric Cationic Surfactant and a Monomeric Anionic Surfactant. Chemistry - An Asian Journal 2016, 11 (19) , 2763-2772. DOI: 10.1002/asia.201600432. Fan Liu, Kai Xu, Chang Xu, Hujun Xu.
Get Price
Why small-scale testing of reagents goes wrong - Papers
Caskey, JA & Primus, RJ 1986, ‘The effect of anionic polyacrylamide molecular-conformation and configuration on flocculation effectiveness’, Environmental Progress, vol. 5, pp. 98-103.
Get Price
effects of anionic polyacrylamide on carbonation the
Effects of Anionic Polyacrylamide on Carbonation for the . The effects of different types of anionic polyacrylamide (PAM) on crystallization behavior of precipitated calcium carbonate (PCC) prepared via carbonation using calcium hydroxide and carbon dioxide gas. The percentage of aragonite phase increased higher reaction temperature.
Get Price
A pH Effect in the HPSEC Separation of Polyacrylamide
four polyacrylamide-based samples having the eame nominal molecular weight and molecular weight distribution and different levels of anionic content. The samples are examined in two column systems under conditions where the ionic nature of these polymers plays a dominant role in the solution properties.
Get Price
Polyacrylamide (PAM) and Soils - USDA
received various pretreatments. Two polyacrylamide (PAM) compounds in which the NH2 was substituted with OH at 2% (2J) and 21% (21J), rendering them negatively charged, were used. Additionally, a guar compound (4246) used in the study was negatively charged and had a lower molecular weight than PAM.
Get Price
Dextran-Polyacrylamide as Matrices for Creation
The branched water soluble copolymer dextran-graft-polyacrylamide in nonionic and anionic form has been used as nanocarriers for targeted delivery of an anticancer drug into tumor cells. The molecular parameters of the D70-g-PAA copolymer, as determined by size-exclusion chromatography (SEC), are reported in Table 1 .
Get Price
Soil Science Society of America Journal Abstract
The polymer conformation factor has a greater impact on clay structure stabilization in suspension than the electrostatic repulsion effect. The clay structure stability was increased with increasing polymer electrostatic negative charge for similar molecular weights. Please view the pdf by using the Full Text link under 'View' to the left.
Get Price
The Molecular Basis of the Sodium Dodecyl Sulfate Effect
To investigate the molecular interactions of sodium dodecyl sulfate (SDS) with human ubiquitin and its unfolding mechanisms, a comparative study was conducted on the interactions of the protein in
Get Price
A Guide to Polyacrylamide Gel Electrophoresis and Detection
that preserved native protein conformation, subunit interactions, and biological activity (Vavricka 2009). In such systems, proteins are prepared in nonreducing, nondenaturing sample buffer, and electrophoresis is also performed in the absence of denaturing and reducing agents. Data from native PAGE are difficult to interpret. Since
Get Price
Long chain molecular structure polymer-anionic
Impact of anionic polyacrylamide on SpringerLink. The polyacrylamide-adsorbed amount increase with the rise of carboxyl group content is also observed. More numerous anionic groups cause more expanded conformation of polymeric chains. Such structure of adsorbing macromolecules favors their higher adsorption in the alumina–polymer solution system.
Get Price
Polyacrylamide molecular formulation effects on erosion
Yang, L.-x., Li, S.-c., Sun, H.-l., Ye, F.-f., Liu, W. and Luo, S. 2011. Polyacrylamide molecular formulation effects on erosion control of disturbed soil on steep rocky slopes. Can. J. Soil Sci. 91: 917-924. Soil erosion caused by increasing runoff and soil disturbances is a severe problem on steep rocky slopes. One possible soil erosion control measure is the application of polyacrylamide
Get Price
Effect of colloidal silica and electrolyte
The anionic components used were non-aggregated and microaggregated anionic colloidal silica particles (ACS) and an anionic polyacrylamide (A-PAM). The C-PAM was adsorbed to a silica surface and the different anionic components were then added to the system. The effect of adding an electrolyte (NaCl) to some of these systems was also investigated.
Get Price
Dextran-Polyacrylamide as Matrices for Creation
The branched water soluble copolymer dextran-graft-polyacrylamide in nonionic and anionic form has been used as nanocarriers for targeted delivery of an anticancer drug into tumor cells. The molecular parameters of the D70-g-PAA copolymer, as determined by size-exclusion chromatography (SEC), are reported in Table 1 .
Get Price
The Molecular Basis of the Sodium Dodecyl Sulfate Effect
To investigate the molecular interactions of sodium dodecyl sulfate (SDS) with human ubiquitin and its unfolding mechanisms, a comparative study was conducted on the interactions of the protein in
Get Price
A Guide to Polyacrylamide Gel Electrophoresis and Detection
that preserved native protein conformation, subunit interactions, and biological activity (Vavricka 2009). In such systems, proteins are prepared in nonreducing, nondenaturing sample buffer, and electrophoresis is also performed in the absence of denaturing and reducing agents. Data from native PAGE are difficult to interpret. Since
Get Price
OPTIMAL USE OF FLOCCULANTS ON THE MANUFACTURE OF FIBRE
The influence of the molecular weight and the anionic charge of anionic polyacrylamides on the flocculation effect on mineral fines retention, dewatering and formation and, as a consequence, on the overall efficiency of or anionic polyacrylamide (A-PAM) is added to a cement suspension. This dosage is expressed as .
Get Price
Polyacrylamide Flocculation of Chromite Ore
Polyacrylamide bonding with particle surfaces is strongly affected by both pH and the degree of hydrolysis. Polyacrylamides bind with chromite ore surfaces most probably through hydrogen bonding. Polyacrylamide conformation at the particle surface is affected by the nature of polymer-particle interactions.
Get Price
