Composite film with non-angle-dependent structural color as well as preparation method and application of composite film

By using cellulose nanocrystals, sorbitol, tannic acid, and polylysine to prepare angle-independent structural color composite films, the problems of strong angle dependence and single function of CNC films are solved, realizing multifunctional integration, which is suitable for anti-counterfeiting and smart packaging.

CN121673653APending Publication Date: 2026-03-17NORTHEAST FORESTRY UNIV
0 Cites 0 Cited by

Patent Information

Application Number
CN202610074142.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-20
Publication Date
2026-03-17

AI Technical Summary

Technical Problem

Existing cellulose nanocrystal (CNC) based structural color films are highly angle-dependent and have limited functionality, making it difficult to simultaneously achieve non-angle-dependent structural color, active antibacterial properties, stimulus response, and excellent mechanical properties.

Method used

Using cellulose nanocrystals, sorbitol, tannic acid, and polylysine as raw materials, an angle-independent structural color composite membrane is prepared by evaporation-induced self-assembly. Combining the green and environmentally friendly characteristics of biomass materials, a multifunctional integrated membrane is achieved.

Benefits of technology

The prepared composite film has angle-independent structural color, antibacterial properties, humidity-induced response, and high flexibility, with a 12-fold increase in elongation at break, making it suitable for anti-counterfeiting materials and smart packaging.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses a composite film with a non-angle-dependent structural color as well as a preparation method and application thereof, and belongs to the field of functional film materials. The invention aims to solve the problem that an integrated film with non-angle-dependent structural color, active antibacterial property, stimulus response and excellent mechanical property is difficult to realize by a CNC film at the same time. The invention discloses a composite film with a non-angle-dependent structural color. The composite film is prepared from cellulose nanocrystals, sorbitol, tannic acid and polylysine, the method comprises the following steps: 1, mixing cellulose nanocrystal suspension and sorbitol; 2, adding tannic acid; 3, adding a polylysine solution; and 4, evaporation-induced self-assembly film formation. The method is applied to anti-counterfeiting materials and intelligent packaging materials.
Need to check novelty before this filing date? Find Prior Art