Interaction and Adsorption of Hydrophobically Modified
Research Article Interaction and Adsorption of Hydrophobically Modified Polyacrylamide on Silica and Asphaltene Surfaces Wenjie Zou ,1 Zichuan Fang,1 Zhijun Zhang ,2 and Zhenzhen Lu 3 1Civil and Resource Engineering School, University of Science and Technology Beijing, Beijing 100083, China 2School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing, China
The adsorption of modified polyacrylamides (PAM) at the silica surface has been studied by ellipsometry. To study the influence of the type of modification of the polyacrylamide on the adsorption behaviour, we have used cationic, anionic and hydrophobically modified polyacrylamides with varying charge density and degree of hydrophobisation. The adsorbed amount and adsorbed layer thickness were
Interaction and Adsorption of Hydrophobically Modified
The adsorption of polymers affects the cost and oil recovery in oil reservoir exploitation and the flocculation effect in the treatment of oil sand tailings. The adhesion and adsorption of a hydrophobically modified polyacrylamide (HMPAM), i.e., P(AM-NaAA-C 16 DMAAC), on silica and asphaltene were investigated using surface force measurements, thermodynamic analysis and quartz crystal
The adhesion and adsorption of a hydrophobically modified polyacrylamide (HMPAM), i.e., P(AM-NaAA-C 16 DMAAC), on silica and asphaltene were investigated using surface force measurements
Properties of hydrophobically modified polyacrylamide with
Hydrophobically modified polyacrylamide (HMPAM), with a molecular weight of 10 4 g/mol, was studied using a range of rheological methods and dynamic light scattering (DLS). DLS measurements indicate that the association of the modified polymer begins at low concentration.
Hydrophobically modified polyacrylamide (HMPAM) is synthesized by a free radical micellar polymerization method with low amounts of anionic long-chain alkyl, sodium 9-(and 10)-acrylamidostearate
Effect of salinity on adsorption and interaction forces
Polyacrylamide (PAM) and hydrophobically modified polyacrylamide (HMPAM) with hydrophobic monomer (i.e., hexadecyl dimethyl allyl ammonium chloride (C 16 DMAAC)) have been investigated as model polymers. It is found that the adsorption amounts of HMPAM and PAM polymers on negatively charged silica and positively charged alumina surfaces
(2009). Solution and Adsorption Properties of Hydrophobically Associating Polyacrylamide Prepared in Inverse Microemulsion Polymerization. Journal of Macromolecular Science, Part A: Vol. 46, No. 4, pp. 412-418.
Solution properties and flocculation of hydrophobically
The hydrophobically associating cationic fluorinated polyacrylamide (CFPAM), modified with fluorinated acrylate, 2-(perfluorooctyl)ethyl acrylate (FEA), has been newly synthesized, by free radical micellar copolymerization in aqueous solution. The solution properties of these polymers were investigated in details in this study. In addition, the flocculation of CFPAM was also evaluated.
Hydrophobically modified polyacrylamide (HMPAM), with a molecular weight of 10 4 g/mol, was studied using a range of rheological methods and dynamic light scattering (DLS). DLS measurements indicate that the association of the modified polymer begins at low concentration.
Hydrophobically Modified Polyacrylamide Block Copolymers
Here, we describe the synthesis of hydrophobically modified block copolymers composed primarily of a hydrophilic acrylamide backbone structure with small, randomly placed blocks of N,N-dihexylacrylamide, and the formulation of these materials into DNA sequencing matrices[25–27]. We show that with the addition of only ~ 0.1 mol% of the
Cationic starch-grafted-cationic polyacrylamide based . In order to solve this problem, some natural polymer, such as chitosan, cellulose and starch, has been investigated because their derivatives are biodegradable, and their degradation intermediates are harmless for people and the environment [, , ], and starch can be further modified to improve its cationic degree to enhance charge
- What is PHPA mud?
- [Drilling Fluids] A class of water muds that use partially hydrolyzed polyacrylamide (PHPA) as a functional additive, either to control wellbore shales or to extend bentonite clay in a low-solids mud. As a shale -control mud, PHPA is believed to seal microfractures and coat shale surfaces with a film that retards dispersion and disintegration.
- What is partially hydrolyzed polyacrylamide (PHPA)?
- Partially hydrolyzed polyacrylamide (PHPA) polymers are used as additives to bentonite water based fluids to stabilize shales and in HTHP applications because of better thermal stability (PHPA). It also acts as coating on cuttings preventing agglomeration minimizing fluid loss and aiding cuttings transport.
- What is modified polyacrylamide drilling fluid?
- Indeed, modified polyacrylamide drilling fluid has been proven to be of great interest for use in the construction of bored piles and diaphragm walls in recent years. 1. Introduction Drilling fluid is a critical component in exploration and excavation, classified into water-based, oil-based, synthetic-based, and gas-based.
- Can you drill cement with PHPA mud?
- Do not drill cement with PHPA muds, unless the system will be replaced after drilling out, because PHPA muds are sensitive to high pH, especially in the presence of high calcium levels. If drilling cement with a PHPA system is unavoidable, pretreat the system with 0.251bmlbbl [0.7 kg/m3] sodium bicarbonate.
