• flocculation of pcc induced by polymer/microparticle

    Flocculation of PCC induced by polymer/microparticle

    Request PDF Flocculation of PCC induced by polymer/microparticle systems: Floc characteristics This paper examines the characteristics of precipitated calcium carbonate (PCC) flocs produced

  • cationic microparticle based flocculation and retention

    Cationic microparticle based flocculation and retention

    Although the past works indicated cationic microparticles with water-soluble polymers could be effective retention aids for papermaking, the fundamentals of these systems have not been well studied. In this study, the flocculation and retention of PCC in pulp with CPMP and cationic polymer were first investigated. Then the flocculation

  • flocculation and retention of precipitated calcium

    Flocculation and Retention of Precipitated Calcium

    The interactions among positively charged polymeric microparticles, negatively charged fibers, and precipitated calcium carbonate (PCC) particles were studied. It has been found that although CPMP could adsorb onto a positively charged PCC particle surface, effective flocculation of PCC in water could not be obtained by CPMP alone. However, the

  • flocculation behaviour and mechanisms of cationic

    Flocculation behaviour and mechanisms of cationic

    Flocculation systems involving anionic microparticles/cationic polymers have become increasingly important in the past decade. However, very little work using inorganic cationic microparticles (CM) has been reported. In this work, fine clay flocculation was induced by a range of cationic colloidal alumina in conjunction with various linear

  • hetero-flocculation of wood fibres and fines induced

    Hetero-flocculation of wood fibres and fines induced

    Hetero-flocculation of wood fibres and fines induced by polymers and microparticles, Asselman, Tom., Engineering, Chemical., The retention of process colloids in the paper web is essential for papermaking process efficiency and product quality. Fines (fibre fragments) and fillers strongly affect the optical, surface and mechanical properties of paper.

  • evaluation of the flocculation and reflocculation

    Evaluation of the Flocculation and Reflocculation

    Request PDF Evaluation of the Flocculation and Reflocculation Performance of a System with Calcium Carbonate, Cationic Acrylamide Co-polymers, and Bentonite Microparticles Flocculation, flocs

  • flocculation and retention of precipitated calcium

    Flocculation and Retention of Precipitated Calcium

    The interactions among positively charged polymeric microparticles, negatively charged fibers, and precipitated calcium carbonate (PCC) particles were studied. It has been found that although CPMP could adsorb onto a positively charged PCC particle surface, effective flocculation of PCC in water could not be obtained by CPMP alone. However, the

  • peo flocculation with phenolic microparticles request

    PEO Flocculation with Phenolic Microparticles Request

    PEO Flocculation with Phenolic Microparticles. Article in Journal of Colloid and Interface Science 254(1):101-7 · November 2002 with 13 Reads How we measure 'reads' A 'read' is counted each time

  • flocculation kinetics of precipitated calcium carbonate

    Flocculation kinetics of precipitated calcium carbonate

    In polymer induced aggregation, the PCC particle size increases to a plateau value with increasing polymer dosage. Two regions are most pronounced for C-PAM, PVFA/NaAA and A-starch. Region I corresponds to bridging flocculation. Region II is where the particle size reaches a plateau, and not the expected maximum predicted by classical polymer bridging theory or charge neutralisation theory

  • (pdf) understanding the precipitated calcium carbonate

    (PDF) Understanding the Precipitated Calcium Carbonate

    The precipitated calcium carbonate (PCC) flocculation kinetics and floc structures induced by cationic tapioca starch were recorded by the Malvern Mastersizer 2000 (Malvern Instruments Inc

  • (pdf) flocculation kinetics of precipitated calcium

    (PDF) Flocculation kinetics of precipitated calcium

    The PCC flocculation induced by three SNCCs was monitored by photometric dispersion analysis, which showed that SNCC particles could bridge PCC to induce flocculation at

  • flocculation and retention of precipitated calcium

    Flocculation and Retention of Precipitated Calcium

    Flocculation and Retention of Precipitated Calcium Carbonate by Cationic Polymeric Microparticle Flocculants

  • effect of water cationic content on flocculation, flocs

    Effect of Water Cationic Content on Flocculation, Flocs

    The flocculation kinetics is faster but the required flocculant dosage is higher when the suspending medium is industrial water. The cationic entities also affect the floc’s structure because they reduce the reconformation of the polymer during flocculation. Additionally, in industrial water, flocs become more resistant and this effect is

  • depletion flocculation induced by synergistic effects

    Depletion Flocculation Induced by Synergistic Effects

    2013-12-13· Depletion versus stabilization induced by polymers and nanoparticles: The state of the art. Current Opinion in Colloid & Interface Science 2015, 20, 54-59. DOI: 10.1016/j.cocis.2014.11.012. Shunxi Ji, John Y. Walz. Depletion forces and flocculation with surfactants, polymers and particles — Synergistic effects.

  • flocculation and retention of precipitated deepdyve

    Flocculation and Retention of Precipitated DeepDyve

    Read "Flocculation and Retention of Precipitated Calcium Carbonate by Cationic Polymeric Microparticle Flocculants, Journal of Colloid and Interface Science" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

  • effect of shearing forces and flocculant overdose

    Effect of Shearing Forces and Flocculant Overdose

    2005-10-26· Filler flocs induced by the optimal CPAM dosage, which was 3 times lower than the one that neutralized the ζ potential, were partially reversible, although they are generally believed to be irreversible; an excess of CPAM inhibited the reflocculation of the particles and decreased the flocculation rate, but a moderate excess improved floc

  • effect of water cationic content on flocculation, flocs

    Effect of Water Cationic Content on Flocculation, Flocs

    The flocculation kinetics is faster but the required flocculant dosage is higher when the suspending medium is industrial water. The cationic entities also affect the floc’s structure because they reduce the reconformation of the polymer during flocculation. Additionally, in industrial water, flocs become more resistant and this effect is

  • flocculation and retention of precipitated deepdyve

    Flocculation and Retention of Precipitated DeepDyve

    Read "Flocculation and Retention of Precipitated Calcium Carbonate by Cationic Polymeric Microparticle Flocculants, Journal of Colloid and Interface Science" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

  • flocculation studies in papermaking estudo geral

    Flocculation studies in papermaking Estudo Geral

    Furthermore, highly branched polymers are less affected by the water cationic content in all the flocculation stages (flocculation and break up) leading to similar flocs properties independently of the suspending medium. A population balance model for the flocculation of PCC particles with polyelectrolytes of very high molecular weight and

  • flocculation behaviour and mechanisms of deepdyve

    Flocculation behaviour and mechanisms of DeepDyve

    2002-02-04· Flocculation systems involving anionic microparticles/cationic polymers have become increasingly important in the past decade. However, very little work using inorganic cationic microparticles (CM) has been reported. In this work, fine clay flocculation was induced by a range of cationic colloidal alumina in conjunction with various linear polymers. Dynamic flocculation

  • effect of water cationic content on flocculation, flocs

    Effect of Water Cationic Content on flocculation, flocs

    1 Effect of Water Cationic Content on flocculation, flocs resistance and reflocculation capacity of PCC induced by polyelectrolytes Elisabete Antunes a, Fernando A. P. Garcia b, Paulo Ferreira a, Angeles Blanco c, Carlos Negro c and M. Graça Rasteiro a,* a Research Centre for Chemical Processes Engineering and Forest Products, Chemical Engineering

  • salt concentration influence on the efficiency of two

    Salt concentration influence on the efficiency of two

    2012-04-24· The influence of the increase of the solution ionic strength on the flocculation of charged latex particles in the presence of cationic polymers is reported. Empirical flocculation rate constants are experimentally determined using particle counting and for two cationic polymers, one linear and the second with two branches. Comparisons are made with a solution containing monovalent salt only

  • hetero-flocculation of wood fibres and fines induced

    Hetero-flocculation of wood fibres and fines induced

    Secondly, the role of anionic microparticles in a dual flocculation aid was investigated. The influence on the flocculation kinetics and the adsorption behaviour of dissolved and colloidal compounds were studied.The hetero-flocculation of wood fibres and fines induced by polymer and microparticles was analysed in a stirred tank reactor. The

  • modelling pcc flocculation by bridging mechanism using

    Modelling PCC flocculation by bridging mechanism using

    carbonate (PCC) induced by cationic polyacrylamides (C-PAM) of very high molecular weight and medium charge density occurs by the bridging mechanism. As a result, the flocculation kinetic curves exhibit a maximum in the flocs size in the early instants of flocculation and, thereafter, the polymer undergoes reconforma-tion. During this

  • flocculation studies in papermaking final

    Flocculation studies in papermaking final

    level. Furthermore, highly branched polymers are less affected by the water cationic content in all the flocculation stages (flocculation and break up) leading to similar flocs properties independently of the suspending medium. A population balance model for the flocculation of PCC particles with

  • sodium titanate nanobelt as a microparticle to

    SODIUM TITANATE NANOBELT AS A MICROPARTICLE TO

    synergistic flocculation effect with CPAM at a very low dosage, and showed higher flocculation effect with CPAM under neutral and weak alkaline conditions. A suitably high shear level was helpful for the re-flocculation of clay by sodium titanate nanobelt. The clay flocculation induced by the CPAM/titanate nanobelt system demonstrated high shear

  • flocculation studies in papermaking final core

    Flocculation studies in papermaking final CORE

    level. Furthermore, highly branched polymers are less affected by the water cationic content in all the flocculation stages (flocculation and break up) leading to similar flocs properties independently of the suspending medium. A population balance model for the flocculation of PCC particles with

  • microparticle system new cationic microparticle system

    microparticle system New Cationic Microparticle System

    of chemicals used, dosing order, and floc formation. Although Fennosil FS 158 solution has a net cationic charge, this low-molecular-weight polymer has two-charge characteristics (amphoteric). Fennosil FS 158 is added first, before the shear point.The anionic microparticles are strongly attached to the polymer structure, which is carrying

  • flocculation studies in papermaking estudo geral

    Flocculation studies in papermaking Estudo Geral

    Furthermore, highly branched polymers are less affected by the water cationic content in all the flocculation stages (flocculation and break up) leading to similar flocs properties independently of the suspending medium. A population balance model for the flocculation of PCC particles with polyelectrolytes of very high molecular weight and

  • effect of water cationic content on flocculation, flocs

    Effect of Water Cationic Content on flocculation, flocs

    1 Effect of Water Cationic Content on flocculation, flocs resistance and reflocculation capacity of PCC induced by polyelectrolytes Elisabete Antunes a, Fernando A. P. Garcia b, Paulo Ferreira a, Angeles Blanco c, Carlos Negro c and M. Graça Rasteiro a,* a Research Centre for Chemical Processes Engineering and Forest Products, Chemical Engineering

  • interaction modelling of pcc flocculation induced

    Interaction Modelling of PCC Flocculation Induced

    Cationic polymers are often used as flocculants to induce the aggregation of PCC particles and facilitate the removal of PCC in water clarification. In this work, we focused on identifying the optimum dosage of the polymer and understanding the flocculation mechanism via the characterization of the zeta potential of the PCC suspension. Moreover

  • understanding the precipitated calcium carbonate

    Understanding the Precipitated Calcium Carbonate

    The precipitated calcium carbonate (PCC) flocculation kinetics and floc structures induced by cationic tapioca starch were recorded by the Malvern Mastersizer 2000 (Malvern Instruments Inc, Malvern, UK). Of particular interest, a population balance model for PCC flocculation was employed to extract the flocculation constants, namely collision efficiency, magnitude of energy dissipation rate

  • flocculation kinetics of precipitated calcium carbonate

    Flocculation kinetics of precipitated calcium carbonate

    2016-09-05· Read "Flocculation kinetics of precipitated calcium carbonate induced by electrosterically stabilized nanocrystalline cellulose, Colloids and Surfaces A: Physicochemical and Engineering Aspects" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

  • water soluble polymer flocculants: synthesis

    Water Soluble Polymer Flocculants: Synthesis

    There are several differences between aggregation induced by salts (coagulation) and flocculation by high molecular weight polymers 5: i) aggregates formed by polymer flocculation are stronger due to multiple points of adsorptions per particle, ii) in contrast with coagulation, aggregate breakage is often irreversible in polymer flocculation

  • modelling pcc flocculation by bridging mechanism using

    Modelling PCC flocculation by bridging mechanism using

    carbonate (PCC) induced by cationic polyacrylamides (C-PAM) of very high molecular weight and medium charge density occurs by the bridging mechanism. As a result, the flocculation kinetic curves exhibit a maximum in the flocs size in the early instants of flocculation and, thereafter, the polymer undergoes reconforma-tion. During this

  • effect of fiber modification with carboxymethyl cellulose

    Effect of fiber modification with carboxymethyl cellulose

    Carboxymethyl cellulose (CMC) has been used widely to enhance dry strength of paper and uniformity of sheet in the papermaking industry. Besides these positive effects, it may affect the fines retention and dewatering processes negatively. These negative effects are mainly seen when fiber modifications with high CMC dosages are studied in laboratory scale.

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