Page 205 - 《精细化工》2021年第3期
P. 205
第 38 卷第 3 期 精 细 化 工 Vol.38, No.3
202 1 年 3 月 FINE CHEMICALS Mar. 2021
特种染料与颜料
超分散剂对紫色中性墨水颜料分散影响及应用
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徐 琴 ,刘守军 ,杨 颂 ,吴振江 ,郭桐睿
(1. 太原理工大学 化学化工学院,山西 太原 030024;2. 山西英可奥化工技术有限公司,山西 太原
030009)
摘要:研究了超分散剂聚环氧乙烷-稠环芳烃嵌段共聚物的用量、研磨时间对颜料紫 23 粒径、热稳定性及离心
稳定性的影响。通过 TEM 观察墨水微观分散状态,并结合 FTIR 分析分散剂对颜料紫 23 的作用机制。结果表
明:添加质量分数为 15%的超分散剂,2500 r/min 研磨 2.5 h,紫色色浆粒径可达 138 nm,且稳定性最佳。该分
散剂与颜料紫 23 的吸附作用推动力应为分散剂的疏水基团(稠环芳烃)与颜料紫 23 结构中苯环结构通过 π-π
堆积作用发生吸附,从而引起 C—H 键的红外吸收发生变化。用自制紫色色浆调制的中性墨水,触变值为 5.48,
符合行业标准,该墨水长期储存性、线条落墨情况、耐水性均较好。
关键词:超分散剂;颜料紫 23;热稳定性;离心稳定性;紫色中性墨水;特种染料与颜料
中图分类号:TQ630.6 文献标识码:A 文章编号:1003-5214 (2021) 03-0625-07
Effect of hyperdispersant on dispersion of purple gel ink
pigment and its application
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XU Qin , LIU Shoujun , YANG Song , WU Zhenjiang , GUO Tongrui
(1. College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China;
2. Shanxi Inkall Chemical Technology Co., Ltd., Taiyuan 030009, Shanxi, China)
Abstract: Effects of dosage and grinding time of hyperdispersant polyethylene oxide-polycyclic cyclic
aromatic hydrocarbon block copolymer on the particle size, thermal stability and centrifugal stability of
pigment violet 23 were investigated. Microscopic dispersion state of the ink was observed by TEM. The
action mechanism of dispersant on pigment violet 23 was analyzed by FTIR. The results showed that the
particle size of the prepared purple paste was up to 138 nm and the stability was the best after the purple
paster was grinded at 2500 r/min for 2.5 h with mass fraction of 15% hyperdispersant. The driving force of
the adsorption between dispersant and pigment violet 23 was that the hydrophobic group (polycyclic
aromatic hydrocarbon) of dispersant and the benzene ring structure in pigment violet 23 by π-π
accumulation, which caused the infrared absorption change of the C—H bond. The thixotropic value of gel
ink modulated with homemade purple paste was 5.48, which was in line with industrial standards. And the
long-term storage, line and hydrolytic resistance of ink were better.
Key words: hyperdispersant; pigment purple 23; thermal stability; centrifugal stability; purple gel ink;
special dyes and pigments
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颜料紫 23 是一种高档紫色颜料 [1-5] ,具有独特 集体或附聚体的形式存在,导致分散体系不稳定 。
的蓝-红色彩,可广泛应用于油墨、涂料、塑料、纺 因此,如何将颜料紫 23 分散在水性介质中,并使最
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织品等着色 。然而,由于颜料紫 23 比表面积较大 终产品表现出最佳的稳定性,一直是颜料型色浆研
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(86 m /g) ,因此,颜料粒子在水性介质中没有 究的主要方向。
自分散性,若不辅以适宜的分散剂,颜料将会以聚 目前,常用颜料分散剂可分为阴离子型分散剂、
收稿日期:2020-08-18; 定用日期:2020-10-23; DOI: 10.13550/j.jxhg.20200767
作者简介:徐 琴(1996—),女,硕士生。联系人:刘守军(1963—),男,副教授,E-mail:13303460889@163.com;杨 颂
(1987—),男,讲师,E-mail:yangsong@tyut.edu.cn。