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In order to prepare a cellulose-based water absorbent material in an environmentally-friendly way, a cellulose-graft-polyacrylamide (cellulose-g-PAM) copolymer is synthesized by in situ graft copolymerization through a co-rotating twin-screw extruder.An ionic liquid, namely 1-N-butyl-3-methylimidazolium chloride, is used as the reaction medium and ceric ammonium nitrate is used as …
Get PriceThe synthesis of carboxymethyl cellulose-g-polyacrylamide was carried out by a ceric ion induced solution polymerization technique. By varying the amount of catalyst and monomer, six different grades of graft copolymers were synthesized. These graft copolymers were characterized by elemental analysis, infrared spectroscopy, rheological studies ...
Get Price2003-5-5 · Viscosity measurements in aqueous solutions of carboxymethyl cellulose‐g‐polyacrylamide copolymer samples showed that interpositioning of polyacrylamide chains markedly increased the specific viscosity and resistance to biodegradation of the graft copolymers. The flocculation characteristics of the graft copolymers were determined with ...
Get Price2020-9-15 · Here, q e is the equilibrium adsorption capacity (mg/g), q m is the maximum adsorption capacity (mg/g), k L is the Langmuir adsorption constant that represents the binding energy, k F and n are the Freundlich model constants, b T (kJ/mol) and A T (l/g) constants of the Temkin model, R of the gaseous constants, T (K) absolute temperature, ε of the polynomial and β of the activity coefficient ...
Get PriceThe maximum monolayer adsorption capacity (q max) determined using the Langmuir isotherm model for CMC-g-P(AAm) and CMC-g-P(AAm)/MMT were determined to be 158.1 mg/g and 172.4 mg/g, respectively. Also, the kinetic study showed that the pseudo-second- order kinetic model is more capable of describing the kinetic behavior of the process than ...
Get Price2011-5-20 · Cellulose‐graft‐polyacrylamide and cellulose‐graft‐poly(N,N‐dimethylacrylamide) copolymers were prepared by single‐electron‐transfer living radical polymerization (SET‐LRP) in homogeneous medium. Cellulose macroinitiators for SET‐LRP, with different numbers of initiating sites along the cellulose backbone, were successfully ...
Get Price2018-12-11 · Cellulose hydrogels usually have poor mechanical properties which seriously limit their applications in biomedical or industrial fields. Herein, an interpenetrating polymer network strategy was proposed to construct double network hydrogels composed of cellulose and polyacrylamide with high mechanical strength and pH responsive properties. The synergistic interactions and strong hydrogen …
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Get Price2021-7-5 · Key words Cellulose-binding domain 9 Cellulase 9 Anionic polyacrylamide 9 Paper strength additives 9 Paper stock conductivity Introduction Paper strength characteristics inherently depend on the single-fiber strength, the fiber-to-fiber bonds, and the fiber network forms such as the sheet formation. The roles of . Get Price
Get Price2015-8-1 · Conclusion Cellulose‐g‐poly(acrylic acid) ( CGAA ) and cellulose‐g‐polyacrylamide ( CGAM ) were successfully prepared via graft copolymerization and the maximum grafting efficiency for CGAA and CGAM were achieved at 89.40% and 89.98%, respectively. Morphology of modified CC exhibited roughness and multi‐layer after graft copolymerization.
Get Price2011-4-27 · A novel application, utilizing polyacrylamide-g-carboxymethyl cellulose (CMC-g-PAM) in concentrating dilute solutions of Bovine serum albumin (BSA), was investigated. The grafting reaction parameters were investigated and the hydrogel smartness was verified.
Get PriceThis paper reports swelling behavior of cellulose nanocrystal (CNC)-based polyacrylamide hydrogels prepared by a radical polymerization. The CNC acts as a nanofiller through the formation of complexation and intermolecular interaction. FTIR spectroscopy and XRD studies confirmed the formation of intermolecular bonds between the acrylamide and hydroxyl groups of CNC.
Get Pricesensors. Ahola et al. (2008a) noticed that cellulose nanofibrils have a positive effect on the wet and dry strength of paper. All in all, cellulose is a widely used material e.g. in paper, textile, and medical industries. Therefore, the study of the cellulose behavior with …
Get PriceClassical molecular dynamics simulations of polyacrylamide (PAM) adsorption on cellulose nanocrystals (CNC) in a vacuum and a water environment are carried out to interpret the mechanism of the polymer interactions with CNC. The structural behavior of PAM is studied in terms of the radius of gyration, atom–atom radial distribution functions, and number of hydrogen bonds.
Get Price2017-5-19 · Natural polymer flocculants for wastewater treatment have received close attention in recent years. Here we used two flocculants, polyacrylamide and poly(N,N-dimethylacrylamide) grafted cellulose nanocrystals synthesized by a 'macro-RAFT assisted' strategy, for the flocculation of kaolin suspension.
Get PriceInk Detachment and Flotation Efficiency in ONP/OMP Blends. Part II: Determination from the Sideness of 1.2 g Handsheets. Dorris, G. M ... The Effect of Molar Mass and Charge Density of Cationic Polyacrylamide on the Flocculation of Dissolved and Colloidal Substances in Thermomechanical Pulp Water ... Aspects of the Chemistry of Cellulose ...
Get Price2020-10-14 · Natural dispersants and flocculants, often referred to as dispersion stabilizers and liquid–solid separators, respectively, have secured a promising role in the bioprocessing community. They have various applications, including in biomedicine and in environmental remediation. A large fraction of existing dis Journal of Materials Chemistry B Recent Review Articles
Get Price2021-7-8 · RESULTS AND DISCUSSION Latex adduct formation The basic procedure used was similar to that described in an earlier paper. 1 Three antioxidants ((I) to (III)) were selected for detailed study in the adduct reaction in NBR latex at concentrations ranging from 1 to 50g of antioxidant per 100 g of rubber (100 ~o dry rubber basis).
Get PriceAnionic polyacrylamide Polyacrylamide is, simply called PAM, a water- soluble high polymer and widely used in petroleum, paper-making, metallurgical, textile, chemical and environment protection fields. There are three categories of anionic, cationic and non-ionic type.
Get PriceEfficient Removal of Anionic and Cationic Dyes from an Aqueous Solution Using Pullulan-graft-Polyacrylamide Porous Hydrogel By Mustafa Gazi Pullulan based porous semi-IPN hydrogel: Synthesis, characterization and its application in the removal of mercury from aqueous solution
Get PriceAbstract Cellulose acetate electrophoresis and PAGE techniques were compared for fractionation and quantification of milk proteins. Protein bands were stained with Ponceau-S and aniline blue black in the cellulose acetate electrophoresis and PAGE, respectively. α s1 -Casein and β -casein absorbed almost equal quantities of Ponceau-S per unit weight, whereas β -casein absorbed more aniline ...
Get Price2014-6-15 · Abstract. Cellulose (2014) 21:3055–3071 DOI 10.1007/s10570-014-0317-0 OR IGINAL PAPER Development of cellulose nanowhisker-polyacrylamide copolymer as a highly functional precursor in the synthesis of nanometal particles for conductive textiles • • • A. Hebeish S. Farag S. Sharaf Th. I. Shaheen Received: 23 December 2013 Accepted: 30 May 2014 Published online: 15 June 2014 …
Get Price2021-7-2 · carboxymethyl cellulose were studied using synthetic effluent of Kaolin (0.25%) in distilled water. The flocculation capacity measured in terms of reduction in the turbidity was found to be highest for carboxymethyl cellulose-g acrylamide and was dependent on the number and molecular size of the grafted polyacrylamide.
Get PriceImprovements in secondary recovery operations for the recovery of oil, and improvements in well-drilling operations, are accomplished through the use of aqueous gels exhibiting high gel strength prepared from water and a mixture of (a) at least one cellulose ether, e.g., carboxymethyl cellulose, and (b) at least one polyacrylamide.
Get Price46. Multiple Stimuli-Responsive Cellulose Hydrogels with Tunable LCST and UCST as Smart Windows. It has been a significant challenge to prepare multiple-response hydrogels with both lower critical solution temperature (LCST) and upper critical solution temperature (UCST). This work reports the synthesis of methyl cellulose-graft-polyacrylamide ...
Get Price2019-5-24 · 1 Supporting Information Temperature Responsive Cellulose-graft-Copolymers via Cellulose Functionalization in an Ionic Liquid and RAFT-Polymerization Andrea Hufendiek,abc Vanessa Trouillet,d Michael A. R. Meier,*,c and Christopher Barner-Kowollik, *,ab aPreparative Macromolecular Chemistry, Institut für Technische Chemie und Polymerchemie, Karlsruhe Institute of Technology (KIT), …
Get Price2021-7-8 · RESULTS AND DISCUSSION Latex adduct formation The basic procedure used was similar to that described in an earlier paper. 1 Three antioxidants ((I) to (III)) were selected for detailed study in the adduct reaction in NBR latex at concentrations ranging from 1 to 50g of antioxidant per 100 g of rubber (100 ~o dry rubber basis).
Get PriceAnionic polyacrylamide Polyacrylamide is, simply called PAM, a water- soluble high polymer and widely used in petroleum, paper-making, metallurgical, textile, chemical and environment protection fields. There are three categories of anionic, cationic and non-ionic type.
Get Price2011-3-18 · g-polyacrylamide (NC/PAN) superabsorbent composite by graft polymerization with native cellulose powder and acrylamide in aqueous solution, using, N,N´-methylenebisacrylam- ide as a crosslinker and ammonium persulfate as an initiator. The water-1 in
Get Pricesolvent and cellulose-g-polyacrylamide was saponification 2 hours showed the best result with change in refractive index value of 0.00. These result showed that cellulose-g-polyacrylamide was saponification 2 hours has the potential to be used as the the ...
Get Price2021-6-25 · Cellulose pulp machinery imports into Angola soared to X units in 2020, growing by X% on 2019 figures. Overall, imports posted a significant increase. Over the period under review, imports hit record highs at X units in 2018; however, from 2019 to 2020, imports stood at a somewhat lower figure.
Get PriceImprovements in secondary recovery operations for the recovery of oil, and improvements in well-drilling operations, are accomplished through the use of aqueous gels exhibiting high gel strength prepared from water and a mixture of (a) at least one cellulose ether, e.g., carboxymethyl cellulose, and (b) at least one polyacrylamide.
Get Price2020-11-18 · Research article Properties of polyacrylamide composites reinforced by cellulose nanocrystals Marina I. Voronovaa, Oleg V. Surova,*, Andrei V. Afineevskiib, Anatoly G. Zakharova a Laboratory of Physical Chemistry of Polymer-Liquid Heterogeneous Systems, G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 1 Akademicheskaya St., Ivanovo 153045, …
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Get Price2019-12-2 · Cellulose ethers are either used “pure” in formulations, or modified, i.e. mixed with “rheology modifiers”, such as starch ethers, polyacrylamide, inorganic modifiers (bentonites, sepiolites) that essentially have the role of controlling the low shear viscosity of …
Get Price2021-5-12 · ACS Applied Polymer Materials, 2020, DOI: 10.1021/acsapm.0c00414. ABSTRACT: It has been a significant challenge to prepare multiple-response hydrogels with both lower critical solution temperature (LCST) and upper critical solution temperature (UCST). This work reports the synthesis of methyl cellulose-graft-polyacrylamide (MC-g-PAM) hydrogels ...
Get Pricemedium. Some commonly used supporting media include: Paper, Cellulose acetate, Agar gel, Starch gel, Agarose gel and Polyacrylamide gel. In Polyacrylamide gel electrophoresis (PAGE), the molecules being analyzed, migrate in an electric field which is imposed on the aqueous solution (buffer) trapped in the matrix of the gel (Castellanos, 2001).
Get PriceEfficient Removal of Anionic and Cationic Dyes from an Aqueous Solution Using Pullulan-graft-Polyacrylamide Porous Hydrogel By Mustafa Gazi Pullulan based porous semi-IPN hydrogel: Synthesis, characterization and its application in the removal of mercury from aqueous solution
Get Pricesolvent and cellulose-g-polyacrylamide was saponification 2 hours showed the best result with change in refractive index value of 0.00. These result showed that cellulose-g-polyacrylamide was saponification 2 hours has the potential to be used as the the ...
Get PriceOur aim is to evaluate the effect of high molecular weight (13 MDa) cationic polyacrylamide (CPAM) charge and dosage on SiO 2 (74 nm) NP's assembly in cellulose nanofibers composites. Engineered cellulose/SiO 2 composites were investigated by SEM, SAXS and DLS. SEM images show the local area retention of NPs into the cellulose matrix.
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Get Price2021-5-28 · Cationic polyacrylamide was added at 0.05, 0.1, and 0.15%, and cellulose nanofiber was added at 0.1, 0.5, 1, and 2% based on pulp O.D. Laboratory handsheets were prepared (60 g/m 2), and optical and strength properties were measured according to TAPPI standards. Scanning electron microscopy and atomic force microscopy images showed that empty ...
Get PriceImprovements in secondary recovery operations for the recovery of oil, and improvements in well-drilling operations, are accomplished through the use of aqueous gels exhibiting high gel strength prepared from water and a mixture of (a) at least one cellulose ether, e.g., carboxymethyl cellulose, and (b) at least one polyacrylamide.
Get PriceCationic polyacrylamide was added at 0.05, 0.1, and 0.15%, and cellulose nanofiber was added at 0.1, 0.5, 1, and 2% based on pulp O.D. Laboratory handsheets were prepared (60 g/m2), and optical and strength properties were measured according to TAPPI standards.
Get Price2017-8-13 · Singh V, Tiwari A, Tripathi D et al (2004) Microwave assisted synthesis of guar-g-polyacrylamide. Carbohydr Polym 51:1–6 CrossRef Google Scholar Singh V, Tiwari A, Pandey S et al (2006) Microwave-accelerated synthesis and characterization of potato starch-g-poly(acrylamide).
Get PriceCellulose 2020, 27, 2991-3011. 48. K. Mo, M. He, X. Cao, C Chang*. Direct current electric field induced gradient hydrogel actuators with rapid thermo-responsive performance as soft manipulators ...
Get PriceAtom transfer radical polymerization (ATRP) was used to grow polyacrylamide from the surface of ethylene-acrylic acid copolymer (EAA) film. The surface functionalization required
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