采用溶液聚合法制备丙烯酸酯类共聚物作为电泳悬浮体系中的电荷控制剂,可以有效提高颜料粒子在非极性溶剂中的分散性,并使颜料粒子表面带电。随共聚物浓度的增大,颜料粒子的Zeta电位不断增大,并在高浓度下趋于稳定,最高的Zeta电位达到了60.9mV。以共聚物为电荷控制剂、二氧化钛为颜料粒子、苏丹黑为染料的电泳显示液,在电场作用下能够实现黑白电泳显示。
Acrylic copolymers were prepared via solution polymerization,which can be applied as charge control agents in the electrophoretic syspension.It was demonstrated that the copolymer could efficiently improve the dispersivity of the pigments in nonpolar media and charges the pigments positively.With the increase of the concentration of copolymer in tetrachloroethylene,Zeta potential of TiO2 particles enhanced up to 60.9mV.The electrophoretic suspension containing TiO2 as pigment,P（OMA-DMA） as charge control agent can display white/black image under DC field of 0.075V/μm.
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