Premium
Preparation and reshaping of composite microparticles for color toner based on the encapsulated nanoparticles
Author(s) -
Liao Jun,
Ye Mingquan,
Han Aijun,
Chen Xin,
Zhang Kui,
Guo Jianming,
Chen Chenlu
Publication year - 2020
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.49531
Subject(s) - materials science , zeta potential , composite number , nanoparticle , scanning electron microscope , dynamic light scattering , emulsion polymerization , chemical engineering , particle size , transmission electron microscopy , emulsion , particle (ecology) , particle size distribution , composite material , polymerization , nanotechnology , polymer , oceanography , geology , engineering
In this paper, the styrene–acrylic resin‐encapsulated organic pigment composite nanoparticles were synthesized by mini‐emulsion polymerization first, and then the aggregated microparticles used for color toner were prepared via the emulsion aggregation method. Transmission electron microscopy, dynamic light scattering, and zeta potential analysis manifest that when the emulsifier dosage was 5 wt% of the monomer, the composite nanoparticles owned clearly core‐shell structure, uniform size, and appropriate zeta potential, which was conducive to the subsequent aggregation. The evolution of aggregated particle size and morphology under different stirring rates, coagulant concentrations, and temperatures was investigated by mastersizer and scanning electron microscopy. The result shows that when the stirring rate was 1,000 rpm, coagulant concentration was 0.2 mol/L, and the curing temperature was 65°C, aggregated particles with suitable size, narrow size distribution, and regular shape could be obtained. The reshaping of aggregated particles can further improve their morphology. When the reshaping temperature was 75°C, the product particles owned perfect spherical shape, and there were almost no cracks and pores on the surface of the particles. This synthesis strategy is believed to provide a guide for the fabrication of composite microparticles with controllable particle size and morphology.