scholarly journals Application of Spherical Polyelectrolyte Brushes Microparticle System in Flocculation and Retention

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 746
Author(s):  
Yu Huang ◽  
Xiaogang Xue ◽  
Kaiqiao Fu
Keyword(s):  
Electron Microscopy ◽  
Infrared Spectrometry ◽  
Sodium Polystyrene Sulfonate ◽  
Carbon Sphere ◽  
Precipitated Calcium Carbonate ◽  
Retention Efficiency ◽  
Component System ◽  
Polyelectrolyte Brushes ◽  
Surface Initiated Polymerization ◽  
Spherical Polyelectrolyte Brushes

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.

Preparation and Characterization of Poly(Dimethyl Diallyl Ammonium Chloride)/Modified SiO2 Spherical Brushes

2015 ◽  
Vol 731 ◽  
pp. 569-572 ◽  
Author(s):  
Na Su ◽  
Zheng Min Cao
Keyword(s):  
Electron Microscopy ◽  
Ammonium Chloride ◽  
Thermo Gravimetric Analysis ◽  
Gel Permeation Chromatography ◽  
Gravimetric Analysis ◽  
Polyelectrolyte Brushes ◽  
Transmission Electron ◽  
Spherical Polyelectrolyte Brushes ◽  
Trimethoxy Silane

Novel cationic spherical polyelectrolyte brushes (CSPB) consisting of γ-methacryloxypropyl trimethoxy-silane (KH-570) modified SiO2cores and poly (Dimethyl diallyl ammonium chloride) (PDMDAAC) brushes were prepared by conventional free radical polymerization. The resulting CSPB were characterized by Fourier transform infrared spectroscopy (FTIR), Transmission electron microscopy (TEM), Scanning electron microscopy (SEM), and Thermo-gravimetric analysis (TGA). After cleaving the polyelectrolyte chains from the anchoring surface, the molecular weight of brushes was 1.824×103gmol-1from Gel Permeation Chromatography (GPC) measurements.

Enrichment and distribution of counterions in spherical polyelectrolyte brushes probed by SAXS

2019 ◽  
Vol 57 (12) ◽  
pp. 738-747 ◽  
Author(s):  
Zhishuang Ye ◽  
Li Li ◽  
Fang Zhao ◽  
Yuchuan Tian ◽  
Yunwei Wang ◽  
...  
Keyword(s):  
Polyelectrolyte Brushes ◽  
Spherical Polyelectrolyte Brushes

Immobilized CdS quantum dots in spherical polyelectrolyte brushes: fabrication, characterization and optical properties

2015 ◽  
Vol 3 (15) ◽  
pp. 3745-3751 ◽  
Author(s):  
Yu Cang ◽  
Rui Zhang ◽  
Guixin Shi ◽  
Jianchao Zhang ◽  
Lixiao Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Cds Nanoparticles ◽  
Basic Solution ◽  
Cds Quantum Dots ◽  
Polyelectrolyte Brushes ◽  
Photochemical Stability ◽  
Spherical Polyelectrolyte Brushes

The SPB@CdS nanoparticles exhibit controllable and reversible photoluminescence with pH as a trigger and strong photochemical stability in basic solution.

Ultrabright dye-loaded spherical polyelectrolyte brushes and their fundamental structure-fluorescence tuning principles

Nanoscale ◽  
2019 ◽  
Vol 11 (29) ◽  
pp. 14050-14059 ◽  
Author(s):  
Hajar Masoomi ◽  
Yao Wang ◽  
Xiaoxia Fang ◽  
Peirui Wang ◽  
Cang Chen ◽  
...  
Keyword(s):  
Fluorescent Particle ◽  
Polyelectrolyte Brushes ◽  
Fundamental Structure ◽  
Spherical Polyelectrolyte Brushes

A novel ultrabright fluorescent particle based on dye-loaded polyelectrolyte brushes is successfully established and the structure-fluorescence tuning principles are revealed.

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