Method for preparing fluorine-containing electronic ink microcapsule

Abstract

The invention relates to a method for preparing a fluorine-containing electronic ink microcapsule, which comprises the following steps of: 1) dissolving carboxymethylcellulose sodium and a fluorine-containing anionic surfactant in the mass ratio of 1-100:1 into water; 2) dissolving gelatin into the water, and adding the mixture into the solution obtained in the step 1), wherein the mass ratio of the gelatin to the carboxymethylcellulose sodium is 0.5-50:1; 3) adding an electrophoresis suspension into the mixture, stirring the mixture to disperse the mixture for 1 to 100 minutes to obtain an O / W type emulsion, wherein the mass ratio of the electrophoresis suspension to the gelatin and the mass ratio of the carboxymethylcellulose sodium to the fluorine-containing anionic surfactant are 0.5-100:1; 4) adding acid solution into the mixture to perform complex coacervation reaction, cooling the mixture, adding a crosslinking agent into the mixture to ensure that the mixture is solidified andcross-linked, and performing the reaction continuously; and 5) adding alkaline solution into the mixture to adjust the pH value, and performing temperature reaction. The method gives play to the characteristics of high surface activity, high heat resisting stability and high chemical stability of the fluorine-containing surfactant, is simple to operate, has a low cost, and can be used for industrial production.

Description

technical field [0001] The invention relates to the field of electrophoretic display, in particular to a preparation method of fluorine-containing electronic ink microcapsules. Background technique [0002] Information science and technology are changing with each passing day. The rapid development of human civilization calls for the emergence of ultra-light, ultra-thin, low-energy flat-panel electronic display technology. Step into a new era. Since electronic ink is a liquid material, it is vividly called electronic ink "water". In essence, electronic ink technology is a microcapsule electrophoretic display invented by Joseph Jacobson of the MIT Media Laboratory (Barrett Comiskey, Joseph Jacobson, et al., Nature, 1998, Vol.394, p253-255). [0003] Microcapsule electrophoretic display is a new type of electrophoretic display technology (US5961804, 1999.10.5) developed by E-ink company in the United States. Its biggest advantage is that electrophoretic particles and insulat...

AI Technical Summary

Problems solved by technology

The prepared urea-formaldehyde resin microcapsules are smooth and rigid, and the wall material has high mechanical strength, but poor flexibility and pressure resistance, so it is difficult to be used in the preparation of flexible electrophoretic display devices

Sadao Kanbe etc. have introduced the microcapsule (US20090127728A1, 2009, 5, 21) that uses gelatin-gum Arabic system as the wall material for electrophoretic display. This microcapsule solvent stability is very good, but because gelatin and gum Arabic are both Natural products have relatively poor stability, and the large amount of imported gum arabic will make it an expensive raw material; in addition, gum arabic is easy to degrade, and long-term use will affect the performance of microcapsules

Images