High-refractive-index structure color fiber with self assembly of ZnS nano balls and preparation method of high-refractive-index structure color fiber with self assembly of ZnS nano balls

Abstract

The invention provides a high-refractive-index structure color fiber with the self assembly of ZnS nano balls and a preparation method of the high-refractive-index structure color fiber with the self assembly of the ZnS nano balls. The preparation method comprises the following steps: firstly, reacting zinc nitrate, thioacetamide and polyvinylpyrrolidone as starting materials for 1-10 hours to obtain the ZnS nano balls, wherein the temperature is controlled to be 60-100 DEG C; then according to the mass ratio of the ZnS nano balls to a dielectric solvent of 1:(20-200), dispersing the ZnS nano balls into the dielectric solvent to obtain a dispersion solution; and finally under the room temperature, carrying out lifting or electrophoretic deposition on a common high-molecular fiber or conductive fiber in the obtained dispersed solution by adopting a mode of lifting or electrophoretic deposition, so as to obtain the high-refractive-index structure color fiber with the self assembly of the ZnS nano balls, wherein the reflecting spectrum range is 400-640nm. The high-refractive-index structure color fiber provided by the invention has the excellent technical effects of wide spectrum range and high saturability and a photonic crystal fiber with complete band gaps can be obtained. The preparation method is environmentally-friendly without pollution and the large-scale production can be realized.

Description

technical field [0001] The invention relates to a self-assembled structural color fiber of high refractive index ZnS nanospheres and a preparation method thereof, and belongs to the field of photonic crystals. technical background [0002] Structural color fiber based on photonic crystals is a new concept to solve the environmental pollution problem in the dyeing and finishing industry. The color produced in this way is different from traditional dyeing: traditional dyeing produces color through the absorption of light by substances. The color is easy to fade under the action of light, heat or solvent, and it is easy to pollute the environment during the preparation and post-treatment process; the generation of structural color by means of colloidal crystals may be a reliable way to solve the above problems, and it has the advantages of simple preparation process and stable color. It has the advantages of reconciling and not easy to fade. However, using the existing method...

AI Technical Summary

Problems solved by technology

However, using the existing method for preparing colloidal crystals to carry out structural dyeing of fibers, there are still some problems that must be solved: K.Q. Zhang et al. reported in J. Fiber Bioeng. Inform. Vol.2 (2010) pp.214-218 A layer of SiO2 nanospheres was assembled on the surface of the fiber by dipping deposition method to achieve structural color, but this method lacks long-range order; the applicant reported in Chemical Communications Vol.4 (2011) pp.12801-12803 reported that a layer of opal structure was self-assembled on the surface of glass fiber to achieve the goal of structural color on the surface of glass fiber, but the colloidal balls used were only SiO2 (n=1.45) , it is difficult to realize the structural color fiber with full bandgap; the applicant reported in Nanoscale Vol.5 (2013) pp. 6917-6922 that the structural color carbon fiber assembled by PMMA colloidal spheres was prepared by electrophoretic deposition, and only the high Polymer materials (n=1.49), the relative refractive index between the ball and the air determines that they cannot prepare photonic crystal structures with wide band gaps

However, the experiment found that obtaining a complete photonic bandgap structure is not as easy as theoretical calculations. For example, when the inverse opal structure has a low filling rate (≤33%), it will affect the bandgap properties of the photonic crystal, so that the complete bandgap cannot be obtained. structure

[0004] At present, there is no structural color fiber prepared with ZnS nanospheres as assembly units

Images