| Autor: |
Liu, Hongli, Wang, Shirong, Sun, Zheng, Xiao, Yin, Li, Xianggao |
| Zdroj: |
Journal of Materials Chemistry C; 1/14/2016, Vol. 4 Issue 2, p323-330, 8p |
| Abstrakt: |
In this study, in order to serve as black particles for electrophoretic displays (EPDs), copper chromite black (CCB) particles were successfully endowed with particle charge in nonpolar Isopar L in the presence of nonionic surfactants (Span80, Span85 and polyisobutylene-mono-succinimide (T151)). Initially, the CCB particles were coated with silica (CCB/SiO2) to gain surface active spots. By measuring their electrophoretic mobility in Isopar L, it is found that all the samples possess a negative charge with a maximum of −12.95 × 10−10, −14.18 × 10−10 and −17.43 × 10−10 m2 V−1 s−1 at 12, 16 and 16 mM for Span80, Span85 and T151, respectively. Moreover, the particle charge values of the surfactant treated CCB/SiO2 particles were ordered as T151 ＞ Span85 ＞ Span80. These charging behaviors were discussed and interpreted from the point of charged micelles via measuring the conductivity and transient current of corresponding surfactant solutions. Significantly, a prototype EPD employing T151 treated CCB particles exhibited a quite quick response (response time: 189.6 ms) with a white–black contrast ratio of 6.27 under 0.3 V μm−1. This excellent display performance renders the CCB particles to be a promising pigment for producing the black color in electronic paper and other display applications. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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