复合墨粉用色母粒子的制备与表征

【作者】 苏建刚；

【导师】 叶明泉；

【作者基本信息】 南京理工大学 ， 材料学， 2004， 硕士

【摘要】 针对粉碎法墨粉的不足，采用悬浮聚合的方法制备墨粉，得到了平均粒径为10μm左右，粒径分布宽度较窄的球形墨粉，而且墨粉的玻璃化温度等热学性能和粉碎法的相似，还对悬浮聚合法制备墨粉的成粒机理等进行了研究，通过研究发现墨粉的性能可通过改变工艺条件方便地达到，具体如下： 1．悬浮聚合法制备墨粉的关键是在连续水相中获得良好分散的单体小液滴； 2．碳黑、铁黑在聚合反应过程中体系能量的变化引起碳黑、铁黑的局域流动及体系状态的变化是形成产物表面结构的原因； 3．为了提高聚合墨粉的表面特性，对碳黑、铁黑进行表面改性，以提高与单体及聚合物的相容性； 4．对影响聚合产物热学性能的各因素进行了简要分析，并对聚合反应速率进行了研究； 5．为了提高墨粉的荷电特性，采用粒子复合的方法来制备墨粉。更多还原

【Abstract】 According to the defects of the toner prepared by pulverization, polymerization was carried out to produce high quality toner. A spherical polymerized toner with mean particle size about 10 m and a span (d90-d10/d50) about 1.5 is prepared by suspension copolymerization of a mixture of styrene/n- butyl acrylate/carbon black(iron black). The thermal property of polymerized toner is equal to the pulverized toner. And the mechanism of the process of particle forming was also investigated. Through the experimental and theoretic study, the property of polymerized toner can be adjusted by changing the technique was found.1. The key process of preparing good quality toner is to get the good dispersion of oil droplet in the water phase. The average particle size and span was affected by the additive amount of carbon black, time of supersonic, the velocity of stirring, the proportion of oil and water and the dispersant.2. The reason forming the surface structure of toner is that the pigments’ flowing because of the energetic change.3. In order to upgrade the toner’s surface structure, the pigment was modified its surface property by Si-75.4. The factors affected the toner’s thermal property were studied, and the polymerized velocity was also investigated.5. In order to improve the charge of toner, the technology of particle compound was carried out.更多还原