电泳显示用高质量铁锰黑纳米分散系的构建

doi:10.16085/j.issn.1000-6613.2021-1295

摘要/Abstract

摘要：

通过表面改性技术获得电泳显示用非水介质分散铁锰黑纳米粒子。在异构十二烷（Isopar L）中，选用十六烷基三甲基溴化铵（CTAB）、十二烷基硫酸钠（SDS）、(N-四乙烯四胺)聚异丁烯单丁二酰亚胺（T151）和山梨糖醇酐三油酸酯（Span 85）四种表面改性剂，通过混合球磨工艺对铁锰黑粒子进行表面修饰，研究了修饰后铁锰黑粒子在Isopar L中的粒径分布和表面荷电性质。T151对铁锰黑的修饰效果最好，原始铁锰黑粒子的平均粒径为1μm，zeta电位为-18.58mV，改性后粒径分布为117.6nm±20.5nm，平均粒径为110nm，zeta电位为-96.71mV。将改性铁锰黑粒子用作电泳显示黑粒子，制备的器件在外加电场下具有电泳响应，对比度为5.6。改性铁锰黑粒子在兼顾高分散稳定性和高带电量的同时还具有耐高温和环保的特质，这不仅为铁锰黑粒子在电泳显示应用中提供了可靠的实验基础，也为电泳黑粒子的选择提供了更多的可能性。

关键词: 铁锰黑, 纳米粒子, 粒度分布, 异构十二烷, zeta电位, 电泳显示

Abstract:

Iron-manganese black nanoparticles dispersed in non-aqueous medium were obtained by surface modification technique. In iso-dodecane dispersion (Isopar L), cetyltrimethylammonium bromide (CTAB), sodium lauryl sulfate (SDS), (N-tetrafluoroethylene tetramine) polyisobutylene monosuccinimide (T151) and sorbitan trioleate (Span 85) were used to modify the surface of iron-manganese black particles through a mixing ball milling process. The particle size distribution and surface charging properties of the modified iron-manganese black particles were studied in Isopar L. T151 had the best effect on the modification of iron-manganese black particles. The average particle size of the original iron-manganese black particles was 1μm with the zeta potential of -18.58mV. After modification, the particle size distribution was 117.6nm ± 20.5nm with the average particle size of 110nm, and the zeta potential was -96.71mV. The modified iron-manganese black particles were used as electrophoretic display black particles. The prototype device prepared had an electrophoretic response under an external electric field with the device contrast of 5.6. The modified iron-manganese black particles had not only high dispersion stability and high charge, but also the characteristics of high temperature resistance and environmental protection. This provided a reliable experimental basis for the application of iron-manganese black particles in electrophoresis display and more possibilities for the selection of black particles in electrophoresis.

Key words: iron-manganese black, nanoparticle, particle size distribution, Isopar L, zeta potential, electrophoresis display

中图分类号:

TQ138.1

李娟娟, 张天永, 李祥高. 电泳显示用高质量铁锰黑纳米分散系的构建[J]. 化工进展, 2022, 41(6): 3178-3185.

LI Juanjuan, ZHANG Tianyong, LI Xianggao. Construction of high-quality iron-manganese black nano-dispersion system for electrophoretic display[J]. Chemical Industry and Engineering Progress, 2022, 41(6): 3178-3185.

图/表 12

图1 铁锰黑在Isopar L中的宏观沉降实验（从左到右表面活性剂依次为T151、Span 85、SDS、CTAB）

图2 改性前后铁锰黑粒子的红外吸收光谱

图3 未改性和T151修饰后铁锰黑粒子的TEM图

图4 未改性和T151修饰的铁锰黑粒子与水的接触角

图5 不同T151浓度下铁锰黑粒子在Isopar L介质中的分散指数和平均粒径

图6 Isopar L中球磨时间对铁锰黑纳米粒子粒径分布的影响

表1 Isopar L中铁锰黑粒子在不同T151质量分数下的电泳淌度

项目	T151质量分数/%
项目	0	0.5	1	2	3	5
电泳淌度 /10^-10m²·V^-1·s^-1	-1.031	-1.782	-2.876	-4.243	-3.932	-3.243
	-1.253	-1.903	-3.354	-4.477	-3.345	-2.637
	-1.632	-1.706	-3.773	-4.826	-4.477	-2.770
	-1.065	-2.735	-3.821	-4.847	-4.736	-3.253
	-1.554	-2.136	-3.146	-5.665	-4.569	-3.306
	-1.233	-2.937	-3.439	-4.253	-4.147	-2.742
	-1.926	-2.348	-3.845	-5.675	-4.515	-3.472
	-1.802	-2.797	-3.813	-5.242	-5.664	-3.657
电泳淌度平均值 /10^-10m²·V^-1·s^-1	-1.437	-2.293	-3.508	-4.904	-4.423	-3.135

图7 T151改性铁锰黑在Isopar L中的带电机理

图8 T151浓度与粒子荷电性质的关系

图9 不同类型表面活性剂修饰后铁锰黑的分散稳定性

表2 铁锰黑粒子的粒径分布与表面荷电性质

铁锰黑

粒径分布

/nm

平均粒径

/nm

PDI

电泳淌度

/10^-10m²·V^-1·s^-1

/mV

图10 器件显示效果

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