A temperature-sensitive color-changing hydrogel with transiently encrypted information and its preparation method

Abstract

The invention discloses a temperature-sensitive color-changing hydrogel with transient encryption information and a preparation method thereof. The hydrogel is composed of polydodecyl itaconate / polyacrylamide first layer network and poly N ‑Isopropylacrylamide second temperature-sensitive network composition, prepared by a two-step method; by regulating N - The amount of isopropylacrylamide controls the cross-link density of the second re-temperature-sensitive network within a suitable window range to obtain the temperature-sensitive color-changing hydrogel with transiently encrypted information. The temperature-sensitive color-changing hydrogel with transiently encrypted information prepared by the present invention can temporarily display specific patterns and information at a specific temperature, can be used for the transmission of high-level secret information, and has the effect of burning after reading ; and due to the orientation structure of the bilayer in the gel, the gel has excellent mechanical strength, overcomes the shortcomings of low mechanical strength of traditional hydrogels, and can be applied to the field of mechanical visualization sensors.

Description

technical field [0001] The invention relates to the field of temperature-sensitive color-changing hydrogel intelligent materials, in particular to a temperature-sensitive color-changing hydrogel with transiently encrypted information and a preparation method thereof. Background technique [0002] Biological tissues contain a lot of water, exist in the state of soft wet gel, and usually have an anisotropic structure from the molecular level to the macroscopic level. The anisotropic architecture of these biological tissues enables organisms to perform highly elaborate functions. For example, actin and myosin exhibit liquid-crystalline anisotropic structures in muscle sarcomeres, which contribute to smooth movement of muscle fibers and muscle contraction in one direction while leaving the other unchanged. Liquid crystal materials with anisotropic or unidirectional orientation are crucial for artificial muscles. In contrast, most commonly used synthetic soft and wet hydrogels ...

AI Technical Summary

Problems solved by technology

[0004] Although the structural color of most anisotropic structural hydrogels can be reversibly regulated by the application / release of stress / strain, so as to achieve the reproducibility of information for the transmission of specific information; however, such characteristics will also It causes security risks such as information leakage, which is not conducive to the transmission of encrypted information. The design and preparation of materials with transient encrypted information that burns after reading has important applications in the safe transmission of high-level secret information.