Preparation and performance of cationic flocculant for papermaking based on the graft polymerization of cationic chains from colloidal silica particles

Zhang, Xiongzhi; Huang, Yu; Fu, Kaiqiao; Yuan, Shiju; Huang, Chi; Li, Houbin

doi:10.1016/j.colsurfa.2015.12.003

Cited by 18 publications

(7 citation statements)

References 27 publications

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“…Zeta potential, relative turbidity, dynamic drainage jar, focused beam reflectance measurements and field emission SEM collectively determined the FE of eucalyptus kraft pulp and kaolin particles. The graft polymer sustained a higher FE than the linear PDMC control and flocculated according to the polymer bridging mechanism …”

Section: Characterizationmentioning

confidence: 97%

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Addressing water scarcity: cationic polyelectrolytes in water treatment and purification

Wilts

Herzberger

Long

2018

Polymer International

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Synthetic cationic polyelectrolytes (CPEs) serve as coagulation and flocculation agents in wastewater treatment due to a synergy of inherent electrostatic interactions and hydrophilic properties. In wastewater treatment, CPEs act as coagulation and flocculation agents to aggregate impurities and enable water purification. New health and environmental-related regulations provide motivation for government agencies and industrial companies to reuse wastewater. Chemical structure, molecular weight, charge density and functionality of CPEs provide tailorability for specific purification needs. Cationic polyacrylamides, ammonium-based polymers, poly(allyldimethyl-ammonium chloride) and epichlorohydrin/dimethylamine-based polymers are the most common CPEs used as coagulation and flocculation agents because they are economical and water soluble with tunable charge densities at high molecular weights. Free radical polymerization, step-growth polymerization and post-polymerization modification methods afford each polymer system. This review highlights recent advancements in synthetic methods to yield CPEs, structure−property relationships as related to flocculation efficiency and a summary of their toxicity and environmental impact.

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Section: Characterizationmentioning

confidence: 97%

“…Zhang et al . synthesized PDMC grafted to colloidal silica particles using a grafting‐from method, depicted in Scheme .…”

Section: Characterizationmentioning

confidence: 99%

Addressing water scarcity: cationic polyelectrolytes in water treatment and purification

Wilts

Herzberger

Long

2018

Polymer International

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“…These results demonstrate the successful surface modification with PDA and the initiator has been immobilized on the surface of SiO 2 particles. For SiO 2 -PDA-PDMC, the strong peak at 1483 cm -1 is the characteristic absorption of quaternary-N [54]. The intension of -CH 2 adsorption peaks (observed at 2926 and 2858 cm -1 ) has a phenomenal increase and the peaks become sharper after being functionalized with PDMC.…”

Section: Resultsmentioning

confidence: 98%

Preparation of polymeric silica composites through polydopamine-mediated surface initiated ATRP for highly efficient removal of environmental pollutants

Huang

Wan

Jiang

et al. 2017

Materials Chemistry and Physics

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In this study, we developed a new procedure to prepare monodispersed functionalized SiO 2 (SiO 2-PDA-PDMC) composites via mussel inspired chemistry and surface initiated atom transfer radical polymerization (SI-ATRP). Samples were characterized by transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS) and thermal gravimetric analysis (TGA) measurements. TEM results showed that spherical morphology was unchanged after the functionalization. FT-IR results confirmed the successful modification with polydopamine (PDA) and the presence of poly-([2-(Methacryloyloxy) ethyl] trimethylammonium chloride) (PDMC) layer on the surface of SiO 2 spheres. TGA data showed that the PDMC account for about 12.12 wt.% in the sample of SiO 2-PDA-PDMC composites. The XPS analysis further confirmed the existence of PDMC on the surface of SiO 2-PDA-PDMC composites. The obtained SiO 2-PDA-PDMC composites were used as adsorbent for the removal of Congo red (CR) from aqueous solution to evaluate the performance in environment application. The effect of contact time, solution pH, initial CR concentration and temperature on the adsorption of CR onto SiO 2-PDA-PDMC composites was investigated. Adsorption results demonstrated that adsorption of CR onto SiO 2-PDA-PDMC composites was a fast and efficient process. The adsorption equilibrium reached within 60 min, and the adsorption process followed the pseudo-second-order model. The experimental data of isotherms were better described by the Freundlich model. Thermodynamic study depicted the endothermic nature of adsorption and the process was spontaneous. Results from the effect of solution pH on the CR adsorption showed that the acidic condition favors the adsorption and provided evidence for the contribution of PDMC on the SiO 2-PDA-PDMC composites in the removal of CR. This study suggests SiO 2-PDA-PDMC composites can be developed as a new adsorbent for the removal of anionic dyes from aqueous solution.

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“…Spherical polyelectrolyte brushes (SPB), which have led to multiple applications in the field of protein immobilization and separation, catalysis and drug delivery [13][14][15][16][17][18][19], have a similar branched structure and also show potential application in papermaking. Our previous studies based on cationic spherical polyelectrolyte brushes (CSPB) suggest that CSPB is suitable for use as a retention aid in turbulent on cationic spherical polyelectrolyte brushes (CSPB) suggest that CSPB is suitable for use as a retention aid in turbulent conditions, as the symmetrical or quasi-symmetrical spherical structure of CSPB makes it less sensitive to hydrodynamic forces [20,21]. Anionic additives, especially when used in dual-polymer retention systems, also play an important role in papermaking.…”

Section: Introductionmentioning

confidence: 99%

Application of Spherical Polyelectrolyte Brushes Microparticle System in Flocculation and Retention

Huang

Xue

2020

Polymers

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In this paper, a microparticle system consisting of cationic polyacrylamide (CPAM) and anionic spherical polyelectrolyte brushes (ASPB) is proposed to improve the retention of pulp suspension containing bleached reed kraft pulp and precipitated calcium carbonate (PCC). We first describe the preparation of ASPB. The ASPB, consisting of a carbon sphere (CS) core and a shell of sodium polystyrene sulfonate (PSSNa) brushes, was synthesized by surface-initiated polymerization. The structure and morphology of ASPB were characterized by Fourier-transform infrared spectrometry (FTIR), field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). Then, flocculation and retention of pulp suspension by a CPAM/ASPB dual-component system were examined. Our results indicate that more highly effective flocculation and higher retention efficiency could be achieved simultaneously by a CPAM/ASPB dual-component system when compared to the conventional microparticle system. Bridging flocculation and electrostatic attraction might be the main flocculation mechanism for CPAM/ASPB systems.

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Preparation and performance of cationic flocculant for papermaking based on the graft polymerization of cationic chains from colloidal silica particles

Cited by 18 publications

References 27 publications

Addressing water scarcity: cationic polyelectrolytes in water treatment and purification

Addressing water scarcity: cationic polyelectrolytes in water treatment and purification

Preparation of polymeric silica composites through polydopamine-mediated surface initiated ATRP for highly efficient removal of environmental pollutants

Application of Spherical Polyelectrolyte Brushes Microparticle System in Flocculation and Retention

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