Quasi uncharged solvent resistance complex function ball and method for making same

A composite function and solvent-resistant technology, applied in chemical instruments and methods, synthetic resin layered products, coatings, etc., can solve problems such as instability of electrophoretic particles

Inactive Publication Date: 2009-03-18
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a quasi-uncharged composite functional ball, which not only solves the problem that the electrophoretic particles in the electrophoretic liquid cannot withstand the corrosion of non-polar solvents and is unstable, but also enables the stable existence of two different colors of pigments It is possible to realize bistable display in electrophoretic fluid

Method used

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  • Quasi uncharged solvent resistance complex function ball and method for making same
  • Quasi uncharged solvent resistance complex function ball and method for making same
  • Quasi uncharged solvent resistance complex function ball and method for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of polystyrene / titanium dioxide nanoparticles: prepared according to Chinese invention patent 200610011885.0;

[0032] (2) Disperse 2g of polystyrene / titanium dioxide nanoparticles obtained in step (1) into 1000mL of deionized water dissolved with 5g of PVP (MW=400000);

[0033] (3) 40g urea and 49mL formaldehyde are mixed to obtain a prepolymer;

[0034] Dilute 200ml of the polystyrene / titanium dioxide nano light sphere solution obtained in step (2) to a certain volume, add 20ml of prepolymer, adjust the pH value to 1 with HCl, polycondense at 15°C, and then solidify at 75°C. Centrifugal washing;

[0035] (4) Stability study: The obtained urea-formaldehyde resin-coated particles were dispersed in non-polar solvents (halogenated alkanes, aromatic compounds, fluorine-containing compounds, alkanes), and they could still be dispersed well after being left for a long time.

[0036] figure 1 A photo of polystyrene spheres / titanium dioxide nanoparticles / ure...

Embodiment 2

[0038] (1) Preparation of polystyrene / titanium dioxide nanoparticles: prepared according to Chinese invention patent 200610011885.0;

[0039] (2) 2g of polystyrene / titanium dioxide nanoparticles obtained in step (1) were dispersed into 1000mL of deionized water dissolved with 200g of PVP (MW=2000);

[0040] (3) 40g urea is mixed with 147mL formaldehyde to obtain prepolymer;

[0041] Dilute 280mL of the polystyrene / titanium dioxide nano-light sphere solution obtained in step (2) to a certain volume, add 40mL of prepolymer, adjust the pH value to 6 with sulfuric acid, polycondense at 55°C, and then solidify at 80°C. Centrifugal washing;

[0042] (4) Stability study: The obtained urea-formaldehyde resin-coated particles were dispersed in non-polar solvents (halogenated alkanes, aromatic compounds, fluorine-containing compounds, alkanes), and they could still be dispersed well after being left for a long time.

[0043] figure 2 For the Zeta change map.

Embodiment 3

[0045] (1) Preparation of polystyrene / titanium dioxide nanoparticles: prepared according to Chinese invention patent 200610011885.0;

[0046](2) 2g of polystyrene / titanium dioxide nanoparticles obtained in step (1) were dispersed into 1000mL of deionized water dissolved with 50g of PVP (MW=55000);

[0047] (3) 40g urea is mixed with 86mL formaldehyde to obtain prepolymer;

[0048] Dilute 200 mL of the polystyrene / titanium dioxide nano-light sphere solution obtained in step (2) to a certain volume, add 8 mL of prepolymer, adjust the pH value to 3 with HCl, polycondense at 30°C, solidify at 55°C, and centrifuge washing;

[0049] (4) Stability study: The obtained urea-formaldehyde resin-coated particles were dispersed in non-polar solvents (halogenated alkanes, aromatic compounds, fluorine-containing compounds, alkanes), and they could still be dispersed well after being left for a long time.

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Abstract

The invention relates to a similar no-electric solvent resistance composite functional ball, in particular to a urea-formaldehyde resin coating polystyrene ball/titanium dioxide nanometer particle. The similar no-electric solvent resistance composite functional ball is urea-formaldehyde resin coating polystyrene ball/titanium dioxide nanometer particle. The preparation method comprises: using polyvinylpyrrolidone or silane coupler to modify polystyrene ball/titanium dioxide nanometer particle; using in-situ polymerization to condensate urea-formaldehyde prepolymer on the surface of the nanometer particle to form dense and transparent similar no-electric urea-formaldehyde resin coat, to obtain solvent resistance particles. The similar no-electric solvent resistance composite functional ball is matched with disperse mediums and can resist the corrosion of non-polar solvent, to stabilize the particles in the solvent and overcome the defects caused by using dyes, thereby providing a base for stabilizing two dyes of different colors in electrophoretic liquid to realize bistability display.

Description

technical field [0001] The invention relates to a quasi-uncharged solvent-resistant composite functional ball and a preparation method thereof, in particular to polystyrene balls / titanium dioxide nanoparticles coated with urea-formaldehyde resin. Background technique [0002] At present, electrophoretic display technology has developed rapidly as a new type of display technology. In 2004, the world's "first" practical commercial e-book produced by Japan's Sony provided technical support from E-ink of the United States and Philips of the Netherlands. , Fujitsu launched the "world's first" bendable color electronic paper with image memory function on July 13 of the same year. At the end of July, Japan's Hitachi released the world's largest electronic paper, with a size of 27 x 20 cm, comparable to the "viewable area" of a 15-inch CRT monitor. The principle is to encapsulate a solution containing charged particles and dyes or two solutions of charged particles with different c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/167C08J3/12C08J7/04C08L25/06C08L61/24C08K3/22B32B27/06
Inventor 唐芳琼彭波孟宪伟陈东
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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