摘要
通过简单的超声分散及强力剪切将滤饼中的有机颜料颗粒以初级粒子形式均匀稳定地分散到单体分散液和微悬浮液中的单体小液滴内,经有机颜料单体分散液的预聚处理和原位微悬浮聚合制备得到一系列具有高颜料包裹率和窄粒径分布特点的微米级聚合物胶粒.实验观察和粒径分析DLS证明,预聚处理可明显提高微悬浮体系中单体液滴相的黏度,因而可有效改善微悬浮体系的聚合稳定性,并降低聚合物胶粒的粒径及其分布;通过协同调节体系分散剂磷酸三钙(TCP)用量和搅拌速率可在保持聚合胶粒较窄分布的同时,在较大范围内实现对胶粒大小的有效调控.光学显微镜(OM)和透射电镜(TEM)观察证明,大量铜酞菁小颗粒已完全被均匀稳定地包裹在具有规整球状特征的聚合物胶粒内,聚合胶粒均具有典型的"石榴状"微胶囊结构.
The organic pigment phthalocyanine blue（PB） was hydrophobic and compatible with monomer,it can be dispersed into monomer dispersion and monomer drops in primary particles form just through ultrasonic and strenuous stirring procedures.Thus a series of organic pigment microcapsules with high pigment encapsulated efficiency and sharp particles size distribution can be prepared via pre-polymerization treatment and in situ micro-suspension polymerization.It was found that the pre-polymerization treatment of monomer dispersion can effectively increase the viscosity of monomer drop phase in suspension and then improve its resistivity to tear,which is conducive to improving the polymerization stability and controlling the microcapsules particles size and size distribution.Optical microscope（OM） and transmission electron microscope（TEM） images of polymerization product show that almost all of the organic pigment particles have been successfully encapsules into pigment microcapsules in a homogeneous state,and thus the spheral microencapsules possess a typical ‘guava-like’structure characterization.It was also found from OM and dynamic light scattering（DLS） that the microencapsules particles size distribution can be controlled in a narrow level,and its mean size can be effectively adjusted in a rather large range just changing tricalciun phosphate（TCP） amount and stirring rate in the in situ micro-suspension polymerization.The microcapsules of pigment by adhesive polymer can remarkably improve the adhesion between the pigment and the target matrix,and simultaneously the dispersion of pigment particles on the matrix surface,thus the resulting organic pigment microcapsules are promising for a number of applications,e.g.pigment printing,pigment dyeing and ink printing.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2011年第2期145-150,共6页
Acta Polymerica Sinica
基金
国家自然科学基金(基金号50803058)
浙江省自然科学基金(基金号Y4100221)
浙江省级科研计划(2009C31089)
浙江省新苗人才计划资助项目
关键词
有机颜料
微胶囊
原位微悬浮聚合
结构形态
Organic pigment
Microcapsulation
in situ Micro-suspension polymerization
Morphology
