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Cu2O single crystal nanoparticle-polymer composite film with bright structural color and preparation method thereof

A single crystal nanometer and polymer technology, applied in the field of structural color materials and new material research, to achieve a strong practical effect

Active Publication Date: 2021-04-09
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fundamentally solves the fastness problem of coloring polymer films with structural colors

Method used

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  • Cu2O single crystal nanoparticle-polymer composite film with bright structural color and preparation method thereof
  • Cu2O single crystal nanoparticle-polymer composite film with bright structural color and preparation method thereof
  • Cu2O single crystal nanoparticle-polymer composite film with bright structural color and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Cu 2 Preparation of O single crystal sphere / PVA composite film

[0032] First prepare monodisperse Cu 2 O single crystal microspheres, the specific preparation method is as follows:

[0033] Weigh PVP (Mw=55000), trisodium citrate dihydrate (Na 3 Cit·2H 2 O) and copper acetate monohydrate, it is put into the beaker, then add the mixed solution of water and ethylene glycol and stir gently. Transfer the mixed solution to a three-necked flask, add NaOH solution with a concentration of 0.5M at a rate of 2mL / min to form a dark blue clear solution, and after stirring vigorously, add 0.12M NaOH at a rate of 0.4mL / s Ascorbic acid, after stirring, quickly add 0.12M ascorbic acid under stirring, react for 1 hour, centrifuge and wash three times with a mixed solution of ethanol and water, and dry for later use.

[0034] Weigh a certain amount of monodisperse Cu 2 O single crystal sphere powder, add absolute ethanol to prepare a 1wt% dispersion.

[0035]A certain amount of p...

Embodiment 2

[0039] The difference with Example 1 is that no Cu 2 O monocrystalline spheres, instead using monodisperse Cu 2 O single crystal "rounded corner" hexahedron.

[0040] Cu 2 Preparation of O single crystal "rounded corner" hexahedron / PVA composite films.

[0041] Preparation of monodisperse Cu 2 O "round corner" hexahedron, the specific preparation method is as follows:

[0042] On the basis of the method of preparing single crystal spheres, keeping the ratio of reactants and ligands unchanged, only EG and H 2 The mass ratio of O was increased to 5:10 to obtain monodisperse Cu 2 O single crystal "rounded corner" hexahedron.

[0043] Weigh a certain amount of monodisperse Cu 2 O single crystal "rounded corner" hexahedral powder, add absolute ethanol to prepare a 2wt% dispersion.

[0044] A certain amount of polyvinyl alcohol powder with a molecular weight of 77,000 was weighed, and water was added to prepare a 6wt% solution.

[0045] Will Cu 2 Ethanol dispersion of O si...

Embodiment 3

[0048] Cu 2 Preparation of O single crystal sphere / cellulose composite membrane

[0049] The difference with Example 1 is that polyvinyl alcohol is not used

[0050] Using Cu in Example 1 2 Preparation of Cu from O single crystal sphere dispersion 2 O film, with cellulose as the polymer component, was prepared into a solution with a mass fraction of 10% after adding water. Take a certain amount of cellulose solution and use a coating machine to coat Cu with a thickness of 5 mm. 2 O structural color film coating on the structural color film. After drying at 80°C for 16 hours, it was peeled off from the substrate to obtain brightly colored Cu 2 O single crystal ball / cellulose composite film.

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Abstract

The invention discloses a Cu2O single crystal nanoparticle-polymer composite film with bright structural color and a preparation method thereof, belonging to the field of new material preparation. The process of coloring a polymer film by Cu2O single crystal nanoparticles can be roughly divided into three steps: firstly, spraying the Cu2O single crystal nanoparticles with uniform sizes on a glass substrate to prepare a Cu2O film with a structural color, then uniformly coating the surface of the Cu2O film having the glass substrate with a polymer solution by using a coating machine, and stripping the Cu2O film from the glass substrate after the polymer solution is dried. Thus, the single crystal Cu2O nanoparticles are locked in the polymer film to obtain the Cu2O single crystal nanoparticle-polymer composite structural-color film with a bright color and certain transparency. The composite film has excellent mechanical properties, friction resistance and sun resistance. The environmentally-friendly recyclable Cu2O single crystal nanoparticle-polymer composite film can be prepared in a large area, and is expected to be applied to the fields of packaging, display, decoration and the like.

Description

technical field [0001] The invention relates to the field of structural color materials, in particular to a Cu with bright structural color 2 O single crystal nano particle-polymer composite film and a preparation method thereof belong to the field of new material research. Background technique [0002] Polymer films play a very important role in human production and life and cover many fields, such as films for packaging, films used in building materials or leather, or some films with excellent mechanical and optical properties in industrial applications. High-performance films, stimuli-responsive polymer films for sensing applications, etc., so it is particularly important to combine these polymer films with color aesthetics. [0003] Coloring polymer films with dyes and pigments is not conducive to its application in packaging and other fields. The physical color produced by the interaction between light and micro-nano structure is called structural color, which has the...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08L1/02C08L3/02C08L1/28C08K3/22C08J5/18C08J3/20
CPCC08J5/18C08J3/201C08J2329/04C08J2301/02C08J2303/02C08J2301/28C08K2003/2248C08K2201/011
Inventor 武素丽毕佳捷韩亚群
Owner DALIAN UNIV OF TECH
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