Application of spherical polyelectrolyte brushes microparticle system in flocculation and retention

Area of Science:

• Materials Science
• Polymer Chemistry
• Colloid Science

Background:

• Pulp suspension retention is crucial for papermaking efficiency.
• Conventional microparticle systems face limitations in optimizing flocculation and retention simultaneously.
• Developing advanced retention aids is essential for improving pulp and paper production processes.

Purpose of the Study:

• To develop and evaluate a novel dual-component microparticle system for enhanced pulp suspension retention.
• To investigate the preparation and characterization of anionic spherical polyelectrolyte brushes (ASPB).
• To compare the performance of the CPAM/ASPB system with conventional microparticle systems.

Main Methods:

• Anionic spherical polyelectrolyte brushes (ASPB) were synthesized via surface-initiated polymerization.
• ASPB structure and morphology were characterized using FTIR, FESEM, and TEM.
• Flocculation and retention tests were conducted on pulp suspensions using the CPAM/ASPB dual-component system.

Main Results:

• The synthesized ASPB, featuring a carbon sphere core and sodium polystyrene sulfonate shell, was successfully prepared.
• The CPAM/ASPB dual-component system demonstrated superior flocculation and retention efficiency compared to conventional systems.
• Simultaneous improvement in both flocculation effectiveness and retention efficiency was observed.

Conclusions:

• The CPAM/ASPB dual-component system offers a promising approach for improving pulp suspension retention.
• Bridging flocculation and electrostatic attraction are identified as key mechanisms in the CPAM/ASPB system.
• This advanced microparticle system holds potential for optimizing papermaking processes.