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anionic polyacrylamide crosslinking function

  • USE OF CROSS-LINKED POLYACRYLAMIDE IN

    Cross-Linked Polyacrylamide as a Carrier for Insect and Animal Repellents. The anionic cross-linked polyacrylamide will hydrate and temporarily hold a variety of soluble liquids, and appears to hold high promise as a carrier for nematocides, fungicides, (plant derived) insect repellents, insecticides, animal repellents and possibly even herbicides.

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  • Use and Notice of Nonionic Polyacrylamide - IRO Oil ...

    2021-7-8 · 2. Sand prevention and fixation. The non-ionic polyacrylamide is dissolved into 0.3% concentration and added with crosslinking agent, which can play a role in sand control and sand fixation. 3. Oil exploitation. Polyacrylamide is used in mud additives, stabilizers and sedimentation flocculation to improve the rheological properties of mud. 3.

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  • Polyacrylamide degradation and its implications in ...

    2018-9-7 · The hydrolyzed form of polyacrylamide (HPAM), a co-polymer of acrylamide and acrylic acid, is the most widely used anionic PAM in oil and gas development as well as …

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  • SELECTIVE ADSORPTION OF ANIONIC POLYACRYLAMIDE

    2017-8-25 · coal, kaolinite, anionic polyacrylamide, adsorption, flotation Introduction Flocculation using polyacrylamide involves the mineral processing. For the selective flocculation flotation of fine coal, selective adsorption of flocculants onto the surface of coal or impure minerals is crucial. The surface heterogeneity of coal and clay

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  • nonionic flocculant(polyacrylamide)used for mineral ...

    nonionic flocculant(polyacrylamide)used for mineral processing and wastewater treatment: Nonionic polyacrylamide is a high polymer with the high molecular weight and the low ion exponent, which has the function of flocculation, dispersal, thickening, bonding, film forming, gelating and colloidal stability. It’s flocculation is hardly influenced by the PH value and the salt, and in the process of acid wastewater treatment, its practical effect is superior to the anionic …

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  • Polyelectrolyte hydrogels of chitosan and polyacrylamide ...

    2016-7-20 · cross-linking. Both the cationic and anionic systems were modified by incorporating polyvinyl alcohol (PVA) into the polymeric system. PVA extends structural rigidity and enhances the mechanical strength of the hydrogel, apart from introducing biocompatibility and biodegradability10. The anionic

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  • Crosslinked ionic polysaccharides for stimuli-sensitive ...

    2013-8-1 · SDS is a well known anionic surfactant, mainly used to facilitate the wetting and to increase the apparent solubility of drug. However, after ionotropic crosslinking SDS is thought to coordinate to the crosslinker cation, becoming more hydrophobic. Thus, SDS acts as water repellent and decreases drug release rate from the co-networks.

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  • Difference and application of cationic, anionic and ...

    2021-5-15 · PAM plays an important role in bridging adsorption, which makes suspended particles produce flocculation and sedimentation, and achieves the purpose of purifying sewage. It can also be used for purification of tap water, especially in combination with inorganic flocculant, and has the best effect in water treatment.

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  • Polyacrylamide - an overview | ScienceDirect Topics

    PAA gels are particularly suitable for electrophoresis of proteins due to their chemical inertness and controllable porosity. PAA gels are prepared by chemical copolymerization of acrylamide with a crosslinking reagent, N, N′-methylenebisacrylamide (or its derivatives).

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  • Dextran hydrogels by crosslinking with amino acid

    Amine functionalized polysaccharide hydrogels such as those based on chitosan are widely examined as biomaterials. Here we set out to develop a facile procedure for developing such hydrogels by crosslinking dextran with amino acid diamines. The dextran-amino acid gels were formed by the addition of …

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  • USE OF CROSS-LINKED POLYACRYLAMIDE IN

    Cross-Linked Polyacrylamide as a Carrier for Insect and Animal Repellents. The anionic cross-linked polyacrylamide will hydrate and temporarily hold a variety of soluble liquids, and appears to hold high promise as a carrier for nematocides, fungicides, (plant derived) insect repellents, insecticides, animal repellents and possibly even herbicides.

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  • An enhanced immobilization of BSA biomolecule on

    2017-1-28 · In this work, we focus on how the anionic co-monomer acidity affects the sensitive protein adsorption, their uptake and the swelling behavior in BSA solution of the acrylamide-based hydrogels. For this, copolymers based on acrylamide (AAm) and maleic acid (MA) co-monomers were prepared by free radical crosslinking copolymerization at higher ...

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  • Novel sodium silicate/polymer composite gels for the ...

    2019-6-5 · Gels with anionic polyacrylamide/Al-Cit show the best fire extinction performance. ... (WG) gel, to obtain three gels labeled as CPAM/WG, HPAM/WG, and CMC/WG. A crosslinking agent, aluminum citrate, was subsequently added to the HPAM/WG and CMC/WG gels to afford two novel ... Variation of water retention rates of gels as a function of polymer ...

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  • Properties of Polyacrylamides

    2020-7-11 · COMMERCIAL Polyacrylamides Major manufacturers of acrylamide polymers are BASF, SNF Floerger, Shangdong Tongli , and Kemira. Applications. Poly(acrylamide-co-acrylic acid) and its sodium salts (APAM) are widely used as thickening agent, binder, super absorbent, soil conditioner, filtering aid, flocculating agent, crosslinker, suspending agent, lubricant, and oil recovery agent.

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  • China Crosslinked Polyacrylamide, China Crosslinked ...

    China Crosslinked Polyacrylamide, China Crosslinked Polyacrylamide Suppliers and Manufacturers Directory - Source a Large Selection of Crosslinked Polyacrylamide Products at cationic polyacrylamide,anionic polyacrylamide,polyacrylamide pam anionic cationic from China Alibaba.com

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  • diffusion of polymers through polyacrylamide gel

    Diffusion of polymers through polyacrylamide gels. Diffusion of polymers through gels. L. Haggerty et al. RESULTS AND DISCUSSION Effect of monomer and crosslinker concentration on diffusion In Figure 4, the diffusion coefficients for the four solutes are plotted as a function of the initial monomer concentration in the gel (constant crosslink ratio of 0.035).

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  • Polyacrylamide by Yingyang Green Brocade Activated

    Polyacrylamide flocculation treatment of waste water, cover an area of an area small, less investment, strong adaptability, a brief, high processing efficiency, can control the space is large, etc. PH value is too low, acid easily provoked explosion together, constitute a crosslinking shape insolubles, spending anionic polyacrylamide and lower ...

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  • Polyacrylamide - an overview | ScienceDirect Topics

    Polyacrylamide (PAA) Polyacrylamides are water-soluble synthetic linear polymers made of acrylamide or the combination of acrylamide and acrylic acid. Polyacrylamide finds applications in pulp and paper production, agriculture, food processing, mining, and as a flocculant in wastewater treatment. Polyacrylamide undergoes thermal degradation at ...

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  • (PDF) New anionic crosslinked multi-responsive

    Cyclodextrin-anionic polysaccharide hydrogels: Synthesis, characterization, and interaction with some organic molecules (water pollutants, drugs, proteins) By Georgeta Mocanu. Anionic Polysaccharide Hydrogels with Charges Provided by the Polysac- charide or the Crosslinking Agent.

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  • Cross-linking in Hydrogels - A Review

    2014-4-2 · polyacrylamide gel. Uncrosslinked polyacrylamide is soluble in water, and crosslinked polyacrylamides can absorb water but is insoluble. Water-logged gels of crosslinked polyacrylamides are used to make soft contact lenses. iv) Increased T g and increase strength and toughness. Crosslinking changes the local molecular packing, resulting

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  • Synthesis and characterization of porous hydrogel

    2021-7-12 · Subsequently, physical crosslinking increased due to the interaction of lignin. The increased crosslinking decreased the pore size of the high-lignin content polyacrylamide hydrogel. Swelling Ratio. Figure 6 shows the swelling ratios of the hydrogels as a function of time in deionized water.

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  • Efficient Removal of Anionic and Cationic Dyes from an ...

    Efficient Removal of Anionic and Cationic Dyes from an Aqueous Solution Using Pullulan-graft-Polyacrylamide Porous Hydrogel ... been plotted as a function of the initial pH, and the pH at ...

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  • Study on Branched Polyacrylamide Preparation and ...

    The polyacrylamide with middle molecular weight and low viscosity was obtained by reacting acrylamide, cationic monomer [2-(acryloyloxy)ethy] -trimethylammonium chloride and N,N-dimethylaminoethyl methacrylate, anionic monomer itaconic acid, active nonionic monomer N-metholacrylamide and crosslinking monomer 1,3,5-triacryloylhexahydro-s-rine ...

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  • (PDF) New anionic crosslinked multi-responsive

    Cyclodextrin-anionic polysaccharide hydrogels: Synthesis, characterization, and interaction with some organic molecules (water pollutants, drugs, proteins) By Georgeta Mocanu. Anionic Polysaccharide Hydrogels with Charges Provided by the Polysac- charide or the Crosslinking Agent.

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  • ISO Approval Zwitterionic Polyacrylamide Emulsion

    Anionic Polyacrylamide Flocculant (33) Cationic Polyacrylamide Flocculant (35) Nonionic Polyacrylamide (28) Zwitterionic Polyacrylamide ... for textile sizing. Sand control and sand fixation:At a certaincon centration by adding crosslinking agent, spraying in the desert, the Solidified films can control and fixing sand. In arid areas, can be ...

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  • Polyacrylamide : Manufacturers, Suppliers,

    Polyacrylamide flocculation treatment of waste water, cover an area of an area small, less investment, strong adaptability, a brief, high processing efficiency, can control the space is large, etc. PH value is too low, acid easily provoked explosion together, constitute a crosslinking shape insolubles, spending anionic polyacrylamide and lower ...

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  • China Nonionic Polyacrylamide Manufacturers,

    (5) Sand control and sand fixation: Non-ionic polyacrylamide is dissolved into 0.3% concentration and added with crosslinking agent, which can be sprayed on desert to prevent sand and fix sand. (6) Chemical grouting agent: 9.5 phr of non-ionic polyacrylamide and 0.5 phr of N-methylene bisacrylamide can be used as chemical grouting agent for ...

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  • Characteristics and applications of polyacrylamide -

    2021-4-1 · Polyacrylamide is a water-soluble linear polymer polymerized by acrylamide (AM) monomer initiated by free radicals. It has good flocculation and can reduce the frictional resistance between liquids. It can be divided into ionic characteristics. There are four types of non-ionic, anionic, cationic and amphoteric type.

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  • Removal of anionic dyes from aqueous solutions using ...

    2017-3-27 · removal of anionic dyes such as reactive orange-20 (RO-20) and direct red-31(DR-31) from aqueous solutions. The adsorption efficiency of as-prepared hydrogels was compared with each other and the suitable hydrogel for adsorption of RO-20 and DR-31 dyes was identified. Adsorption experiments were performed as function of pH, PAM or PAA

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  • Efficient Removal of Anionic and Cationic Dyes from

    2014-10-24 · A pullulan-graft-polyacrylamide porous hydrogel was prepared by radical polymerization in the presence of a crosslinking agent (N,N′-methylenebisacrylamide). Then, the swelling behavior of the hydrogel and the kinetics of swelling were investigated. The novel synthesized hydrogel was used as an adsorbent for removal of dyes from aqueous solutions.

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  • Polyacrylamide Gel Electrophoresis (PAGE ...

    2021-4-1 · Polyacrylamide is a water-soluble linear polymer polymerized by acrylamide (AM) monomer initiated by free radicals. It has good flocculation and can reduce the frictional resistance between liquids. It can be divided into ionic characteristics. There are four types of non-ionic, anionic, cationic and amphoteric type.

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  • Characteristics and applications of polyacrylamide -

    2021-7-12 · Subsequently, physical crosslinking increased due to the interaction of lignin. The increased crosslinking decreased the pore size of the high-lignin content polyacrylamide hydrogel. Swelling Ratio. Figure 6 shows the swelling ratios of the hydrogels as a function of time in deionized water.

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  • Synthesis and characterization of porous hydrogel

    2004-9-24 · Three series of semi‐interpenetrating polymer networks, based on crosslinked poly(N‐isopropyl acrylamide) (PNIPA) and 1 wt % nonionic or ionic (cationic and anionic) linear polyacrylamide (PAAm), were synthesized to improve the mechanical properties of PNIPA gels.The effect of the incorporation of linear polymers into responsive networks on the temperature‐induced transition, …

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  • Semi‐interpenetrating polymer networks composed

    2021-3-16 · Polyacrylamide (PAM) is a collective name for acrylamide homopolymers or polymers obtained by copolymerization with other monomers. It is one of the most widely used species in water-soluble polymers. Because polyacrylamide structural units contain amide groups, it is easy to form hydrogen bonds, which makes them have good water solubility and ...

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  • Polyacrylamide (PAM) - sewagepurifying.com

    Effects of physicochemical properties of polyacrylamide (PAA) and (polydimethylsiloxane) PDMS on cardiac cell behavior K. Daliri, K. Pfannkuche and B. Garipcan, Soft Matter, 2021, 17, 1156 DOI: 10.1039/D0SM01986K This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further …

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  • Effects of physicochemical properties of

    1994-4-1 · @article{osti_7274659, title = {Effect of multivalent salts -- calcium and aluminum -- on the flocculation of kaolin suspension with anionic polyacrylamide}, author = {Peng, F F and Di, P}, abstractNote = {The effects of calcium and aluminum ions on the interaction behavior of anionic polyacrylamide (anionic PAM or HPAM) and kaolin are important in determining the efficient …

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  • Effect of multivalent salts -- calcium and aluminum --

    fracturing fluid anionic polyacrylamide, Wholesale Various High Quality fracturing fluid anionic polyacrylamide Products from Global Sodium Tripolyphosphate Suppliers and fracturing fluid anionic polyacrylamide Factory,Importer,Exporter at Okchem.com.

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  • fracturing fluid anionic polyacrylamide, fracturing fluid ...

    The invention discloses a hydrophobic associated anionic polyacrylamide water-in-water emulsion and a preparation method thereof. The hydrophobic associated anionic polyacrylamide water-in-water emulsion is prepared by initiating and polymerizing a water solution system which comprises inorganic salt, nonionic monomers, anionic monomers, hydrophobic monomers, a stabilizer, a chelating agent ...

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  • background on acrylamide gel electrophoresis

    2004-1-29 · SDS Polyacrylamide Gel Electrophoresis (SDS-PAGE) Sodium dodecyl sulfate (SDS or sodium lauryl sulfate) is an anionic detergent which denatures proteins molecules without breaking peptide bonds. It binds strongly to all proteins and creates a very high and constant charge:mass ratio for all denatured proteins.

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  • WO2000011046A1 - Dialdehyde-modified anionic and ...

    Composition comprising crosslinked, thermosetting, water soluble polymer having nonionic moieties derived from acrylamide, methacrylamide or both; anionic moieties derived from α, β-unsaturated carboxylic acids having from 3 to 5 carbon atoms and salts thereof; and optionally cationic moieties derived from unsaturated monomers containing amino groups or quaternary ammonium groups, said ...

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  • Study on Branched Polyacrylamide Preparation and ...

    The polyacrylamide with middle molecular weight and low viscosity was obtained by reacting acrylamide, cationic monomer [2-(acryloyloxy)ethy] -trimethylammonium chloride and N,N-dimethylaminoethyl methacrylate, anionic monomer itaconic acid, active nonionic monomer N-metholacrylamide and crosslinking monomer 1,3,5-triacryloylhexahydro-s-rine ...

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  • Efficient Removal of Anionic and Cationic Dyes from

    2014-10-24 · A pullulan-graft-polyacrylamide porous hydrogel was prepared by radical polymerization in the presence of a crosslinking agent (N,N′-methylenebisacrylamide). Then, the swelling behavior of the hydrogel and the kinetics of swelling were investigated. The novel synthesized hydrogel was used as an adsorbent for removal of dyes from aqueous solutions. In this study, methylene blue (MB) and ...

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  • pH-Dependent Gelation of a Stiff Anionic

    Cross-linking of polysaccharides by metal ions provides polymer gels highly required by industrial applications. In this article, we study the rheological properties and microstructure of solutions of a stiff anionic polysaccharide xanthan cross-linked by chromium (III) ions, and we demonstrate that their properties are highly sensitive to the preparation pH.

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  • Polyacrylamide (PAM) - sewagepurifying.com

    2021-3-16 · Polyacrylamide (PAM) is a collective name for acrylamide homopolymers or polymers obtained by copolymerization with other monomers. It is one of the most widely used species in water-soluble polymers. Because polyacrylamide structural units contain amide groups, it is easy to form hydrogen bonds, which makes them have good water solubility and ...

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  • Function Synergy of Cross-Linked Cationic PVA

    2020-3-14 · In this research, a kind of 2-acrylamido-2-methylpropanesulfonic acid sodium salt- (AMPS-Na-) type copolymer additive, the fluid loss additive (FLA), named as FLA A additive, was used for research. The performance of FLA A was tested and found to fail in the effective control of free water and to hinder the hydration process for delaying the breaking of the early hydration shell.

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  • Recent Progress of Polysaccharide‐Based Hydrogel ...

    Dai and coworkers synthesized a novel sodium alginate–polyacrylamide divalent ion crosslinking hydrogel (Cu 2+, Zn 2+, Sr 2+, and Ca 2+) and compared in vitro and in vivo for mechanical performance, antibacterial properties, swelling rate, and biocompatibility. 184 The swelling rate of the hydrogels significantly increased at different times ...

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  • Factors Affecting The Use Of Flocculants (1) - News ...

    Factors Affecting The Use Of Flocculants (1) Jan 08, 2021. The pH value of water has a great influence on the use of inorganic flocculants. The pH value of the water can affect the charge on the surface of the particles and the precipitation process of the flocs, which is one of the important parameters of flocculation in water treatment.

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  • Role of Anionic Surfactants in the Synthesis of Smart ...

    2019-8-7 · The uptake and release of an anionic surfactant from the microgels was studied as a function of soln. pH and temp. Electrostatic attraction between the anionic surfactant and the cationically charged core of the microgel particles is the dominant mechanism for absorption of the surfactant into the core-shell microgel particles.

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  • Function Synergy of Cross-Linked Cationic PVA

    2020-3-14 · In this research, a kind of 2-acrylamido-2-methylpropanesulfonic acid sodium salt- (AMPS-Na-) type copolymer additive, the fluid loss additive (FLA), named as FLA A additive, was used for research. The performance of FLA A was tested and found to fail in the effective control of free water and to hinder the hydration process for delaying the breaking of the early hydration shell.

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  • Semi‐interpenetrating polymer networks composed

    2004-9-24 · Three series of semi‐interpenetrating polymer networks, based on crosslinked poly(N‐isopropyl acrylamide) (PNIPA) and 1 wt % nonionic or ionic (cationic and anionic) linear polyacrylamide (PAAm), were synthesized to improve the mechanical properties of PNIPA gels.The effect of the incorporation of linear polymers into responsive networks on the temperature‐induced transition, …

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  • pH-Dependent Gelation of a Stiff Anionic

    Cross-linking of polysaccharides by metal ions provides polymer gels highly required by industrial applications. In this article, we study the rheological properties and microstructure of solutions of a stiff anionic polysaccharide xanthan cross-linked by chromium (III) ions, and we demonstrate that their properties are highly sensitive to the preparation pH. Stable gels are obtained in a wide ...

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  • Delayed in situ crosslinking of acrylamide polymers

    Delayed in situ crosslinking of acrylamide polymers for oil recovery applications in high-temperature formations

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  • Friction Reduction and Suspension in High TDS Brines

    2017-10-18 · Crosslinking a polymer solution is an industry accepted way to generate a substantial increase in viscosity. ... and additives can function effectively in brines or brine/fresh water mixtures where the TDS may be 50,000 ppm or higher. ... the efficacy of the anionic polyacrylamide friction reducers that are used with FloPRO proppants are ...

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  • Study on Branched Polyacrylamide Preparation and ...

    The polyacrylamide with middle molecular weight and low viscosity was obtained by reacting acrylamide, cationic monomer [2-(acryloyloxy)ethy] -trimethylammonium chloride and N,N-dimethylaminoethyl methacrylate, anionic monomer itaconic acid, active nonionic monomer N-metholacrylamide and crosslinking monomer 1,3,5-triacryloylhexahydro-s-rine ...

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  • Role of Anionic Surfactants in the Synthesis of Smart ...

    As plugging agent polyacrylamide have different impacts onfiltration abilities of oil and water, less on oil and more on water. In application it can be used without crosslinking or crosslinked to gel in combination with aluminum, chromic salts or zirconium salts,etc. or added some resin to become interpenetrating polymer networks (IPN)with higher temperature resistance.

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  • high molecular weight hydrolyzed polyacrylamides

    2019-8-7 · The uptake and release of an anionic surfactant from the microgels was studied as a function of soln. pH and temp. Electrostatic attraction between the anionic surfactant and the cationically charged core of the microgel particles is the dominant mechanism for absorption of the surfactant into the core-shell microgel particles.

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  • Effect of Ionic Crosslinking on The Swelling and ...

    2020-7-24 · stronger interactions with polyacrylamide-based gels than monovalent cations. Recently, Schröfl, et al. ... the elastic modulus was only a function of the degree of swelling.(Horkay et al. 2000) Thus, the ionic ... samples with independently tunable amounts of covalent crosslinking and anionic functional groups

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  • Glucose‐Sensitive Hydrogel Optical Fibers

    2017-2-13 · The measurement of I o as a function of tuning the core RI can be utilized as a sensor to quantify ... -3-APBA) fiber core cladded with Ca alginate. b) The hydrogel matrix is functionalized with 3-APBA. (1) PEG-crosslinked polyacrylamide hydrogel, (2) 3-APBA in charged tetrahedral state, (3) glucose. ... The binding between the anionic boronate ...

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  • Quantitation of acrylamide (and polyacrylamide):

    The U.S. Department of Energy's Office of Scientific and Technical Information

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  • Polyamine, Polydimethylamine-epichlorohydrin

    2014-9-25 · Crosslinking Constraints and Computational Models as Complementary Tools in Modeling the Extracellular Domain of the Glycine Receptor Zhenyu Liu1, Agnieszka Szarecka2,3, Michael Yonkunas2, Kirill Speranskiy2, Maria Kurnikova2, Michael Cascio1,4* 1Center for Neuroscience, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America, 2Department of …

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  • Crosslinking Constraints and Computational Models as ...

    2020-1-9 · 1 Mechanical Properties of Interpenetrating Polymer Network Hydrogels Based on Hybrid Ionically and Covalently Crosslinked Networks . Sina Naficy 1, Shota Kawakami2, Sasha Sadegholvaad, Minato Wakisaka2 and Geoffrey M. Spinks1 1 ARC Centre of Excellence in Electromaterials Science and Intelligent Polymer Research Institute,

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  • Mechanical properties of interpenetrating polymer

    2021-7-12 · (5) Sand control and sand fixation: Non-ionic polyacrylamide is dissolved into 0.3% concentration and added with crosslinking agent, which can be sprayed on desert to prevent sand and fix sand. (6) Chemical grouting agent: 9.5 phr of non-ionic polyacrylamide and 0.5 phr of N-methylene bisacrylamide can be used as chemical grouting agent for

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  • non-ionic polyacrylamide for sand washing in nepal ...

    2013-6-17 · Polyacrylamide (PAAm) PAAm is formed from acrylamide subunits. It is non-toxic however unpolymerized acryla‐ ... chemical structure of some gelling agents also allow for crosslinking. The viscosity of a gelling agent in solution is a function of its molecular weight. The viscosity increases with increasing chain length and concentration ...

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  • Fracturing Fluid Components - IntechOpen

    2016-4-28 · Polyacrylamide. Polyacrylamide (PA) is a synthetic polymer with a rich history of use in molecular biology and, more recently, cell culture applications 62. PA hydrogels are produced by …

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  • A practical guide to hydrogels for cell culture | Nature ...

    133. Li ZL, Deng H*. Synthesis of fluorine-containing polyacrylamide block copolymer and their application for rapidly formation of sub-10 nm microdomains. J. Photopolym. Sci. …

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