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在含蜡苯丙复合乳液中分别加入絮凝剂硫酸钠(Na2SO4)、氯化镁(Mg Cl)2、氯化钙(Ca Cl)和硫酸铝(Al2 2(SO4)3),研究含蜡苯丙复合乳液的凝集行为。通过激光粒度分析仪(DLS)和扫描电镜(SEM)观察凝集过程中乳胶粒的粒径、粒径分布及其形貌变化,研究了絮凝剂的种类和用量对乳液凝集行为的影响,并探讨了乳液的凝集机理。结果表明:四种无机离子的絮凝能力为Al3+>Ca2+>Mg2+>Na+,随着絮凝剂用量增加,凝集速率增快;加入5phr Al2(SO4)3,乳胶粒粒径在1h时快速增长至5~7μm,可满足聚合墨粉的使用要求;乳液的凝集主要经历了乳胶粒长大成粒子簇以及粒子簇的聚并两个过程。
The flocculant sodium sulfate (Na2SO4), magnesium chloride (MgCl) 2, calcium chloride (CaCl) and aluminum sulfate (Al2 2 (SO4) 3) Aggregation behavior of the emulsion. The particle size, particle size distribution and morphological changes of the latex particles during the agglutination process were observed by laser particle size analyzer (DLS) and scanning electron microscope (SEM), and the influence of the type and amount of flocculant on the agglutination behavior of the emulsion was discussed. Aggregation mechanism of the emulsion. The results showed that the flocculation capacity of the four inorganic ions was Al3 +> Ca2 +> Mg2 +> Na +. The flocculation rate increased with the increase of flocculant dosage. When 5 phr Al2 (SO4) 3 was added, ~ 7μm, to meet the requirements of the polymerization of the toner; emulsion aggregation mainly experienced by the particle growth of the particle into particle clusters and particle aggregation of the two processes.