The Preparation And Properties Of A New Materials For Electronic Ink

With the rapid development of flat panel display technology, electronic paperdisplay technology is widely used in the field of E-reader, as a new electronic paperdisplay technology, E-ink has excellent performance such as Low-power portable,flexible display, high contrast etc. The main E-paper display technology currently is touse EPD to display. The microcapsules in the electronic ink display should have thecharacteristics like high transparency, fine Mechanical behavior and smooth in surfaceetc. In this paper, we use several techniques to produce the microcapsules in theElectronic ink display units as well as researching the production and characteristics ofmicrocapsules.This article set phthalocyanine Green G particles as chromogenic electrophoreticparticles while using octadecylamine to modify phthalocyanine Green G particles afterwhich the modified phthalocyanine Green G particles are scattered into theElectrophoresis buffer in which the disperse medium is tetrachloroethylene to producethe Electronic ink electrophoresis solution. After the modification the article analysisthe dispersivity of hthalocyanine Green G particles in the tetrachloroethylene The resultshows that the dispersivity of hthalocyanine Green G particles after the modification areso greatly improved that they can disperse in the tetrachloroethylene for40hours. Andthe dispersion ratio is approximately80%with the diameter of modified phthalocyanineGreen G particles to be approximately4um.In the experiment of situ polymerization of urea-formaldehyde resin microcapsulesby using Urea–formaldehyde as wall material, phthalocyanine Green G particles andtetrachloroethylene are used as capsule core material to produce microcapsules. In thisexperiment, we can acquire steady and transparency microcapsules. The result showsthat when putting the prepolymer which is reacted from Urea and formaldehyde in thecondition of pH equals about8.5into the produced wall material, in the condition thathas the mass fraction equals0.007%at span80and pH at3.0while the stirring speed is800r/min and the temperature is50℃we can produce relative better microcapsules withthe diameter around53.6μm and the encapsulation efficiency above90%. Choosing triethylenetetramine and2,4-toluene diisocyanate as reactions of wallmaterial, this article use interfacial polymerization to produce microcapsules, and thenthey are put into the4ml wall material with0.33g2,4-toluene diisocyanate. In such way,the quality of triethylenetetramine is1.47g, the volume of phthalocyanine Green Gparticles and tetrachloroethylene is4ml, the content of op-10is0.003mol/L, with astirring speed of800r/min, we can produce steady microcapsules. The diameter of thesemicrocapsules is about75.4μm.By complex coacervation method, as wall material gelatin-gum Arabic can producemicrocapsules. In such technique, the mass ratio between gelatin-gum Arabic is1:1, themass fraction of gelatin-gum Arabic is3%, the mass fraction of Sodium dodecylbenzene sulfonate is3%, and the pH value of the solution system is about4.0. With astir speed of700r/min, we can acquire the microcapsules with an average diameteraround49.5μm and the encapsulation efficiency can reach to88%.