中文摘要：

通过分散剂的筛选,研制了配置中性笔墨水的水性碳黑色浆.提出了用于表征碳黑色浆分散稳定性的离心分离-吸光光度方法,并初步实验验证了其可行性.优化了分散剂的用量,并研究了砂磨时间对色浆存储稳定性的影响.结果表明,具有芳环结构的高分子嵌段共聚物是制备碳黑水性色浆的优良分散剂.以碳黑颜料为基准,当苯乙烯-马来酸酐树脂铵盐溶液分散剂用量为20%、砂磨2h时,得到平均粒径为117.1 nm的碳黑色浆,放置15 d后平均粒径为160.0 nm,具有较优的存储稳定性,以此色浆制备的中性墨水具有良好的存储稳定性和书写性能.

英文摘要：

Different kinds of dispersants were tested and the carbon black dispersion for gel ink was prepared. In order to characterize the stability of carbon black dispersion, a centrifugal separation-absorption spectrophotometry method was proposed and verified experimentally. The dosage of the dispersant was optimized. The effect of sand milling time on the storage stability of dispersion was investigated. The results indicated that the block copolymer with aromatic rings was the good dispersant for carbon black aqueous dispersion. The good storage stability of dispersion was achieved under the condition of 2 h sand milling by adding 20%（ω） of ammonium solution of styrene-maleic anhydride resin based on the dry weight of carbon black. The mean particle diameter of the fresh dispersion was 117.1 nm and became 160.0 nm after 15 d storage. And the gel ink prepared with this dispersion also showed good storage stability and writing properties.