An organic-inorganic multistage core-shell structure colorant, and a preparation method and application thereof
By using the SiO2@cationic dye@SiO2 hierarchical core-shell microsphere structure as a colorant, the problems of water solubility and weather resistance of cationic dye inks have been solved, achieving excellent water resistance and color saturation, thus expanding the application range of the ink.
CN118791886BActive Publication Date: 2026-05-19WENZHOU UNIV
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WENZHOU UNIV
- Filing Date
- 2024-06-17
- Publication Date
- 2026-05-19
AI Technical Summary
Technical Problem
Existing cationic dye inks have the problems of high water solubility and poor weather resistance, which cause the writing or drawing information to be lost when exposed to water and sunlight.
Method used
Using SiO2@cationic dye@SiO2 organic-inorganic multilevel core-shell microspheres as colorants, inks with excellent weather resistance and water resistance are prepared through electrostatic adsorption and coating of SiO2 layers.
Benefits of technology
It improves the color saturation and water resistance of inks, ensuring that written or drawn information is not easily faded in water, and expands the application range of cationic dyes.
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Figure CN118791886B_ABST
Abstract
The application discloses an organic-inorganic multistage core-shell structure colorant with excellent water resistance and dispersion stability and a preparation method of a marker ink using the colorant as a colorant, and belongs to the field of new material preparation. The preparation process of the organic-inorganic multistage core-shell structure colorant can be roughly divided into three steps. First, monodisperse SiO2 microspheres with a high surface charge are prepared. The SiO2 microspheres are combined with cationic dyes by electrostatic adsorption to prepare SiO2@ dye core-shell microspheres. Then, SiO2 is coated on the surface of the SiO2@ dye core-shell microspheres by a method to obtain the organic-inorganic multistage core-shell structure colorant. The marker ink prepared by using the colorant as the colorant has excellent writing performance, bright color saturation and water resistance. The application solves the problem of poor water resistance of writing traces in the existing marker ink technology, greatly improves the environmental adaptability, and is favorable to the expansion of the application range of the marker pen and the long-term preservation of high-grade painting works or important information.
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