Light response liquid crystal elastomer fiber membrane and preparation method thereof

Abstract

The invention discloses a light response liquid crystal elastomer fiber membrane and a preparation method thereof. The fiber membrane is prepared by adopting a cross-linkable light response liquid crystal polymer or mixing the cross-linkable light response liquid crystal polymer and a high polymer material, performing high-voltage electrostatic spinning, and adding a cross-linking agent for reaction, wherein the diameter of the fiber is 10 nm-100 [mu]m, and the thickness of the fiber membrane is 100 nm-1 mm. According to the method, the fiber membrane of a side chain type light response liquidcrystal polymer is prepared by electrostatic spinning, so that the liquid crystal polymer is subjected to dual orientation of an electric field and a force field simultaneously under a high pressurefield, and the orientation of liquid crystal units in each fiber can be greatly improved. Meanwhile, the preparation of the overall high-orientation fiber membrane is easily realized by controlling the spinning condition and changing a receiver.

Description

technical field [0001] The invention relates to the technical field of liquid crystal polymer materials, in particular to a light-responsive liquid crystal elastic fiber film and a preparation method thereof. Background technique [0002] With the increasing application of liquid crystal polymers in information technology, artificial intelligence, robotics and software bionics, it has received increasing attention. Among them, the liquid crystal elastomer material is a rising star in the past 10 years. [0003] When we define the nature of the excitation as light excitation, the photoresponsive liquid crystal elastomer material is the most excellent form of realization. Taking azobenzene as an example, its molecular formula is that two benzene rings are connected by an azo bond. As a representative substance of azoaromatic molecules, the absorption spectrum of azobenzene can be moved by changing the substituent groups on the benzene rings. Move from ultraviolet light to vi...

AI Technical Summary

Problems solved by technology

[0004] Although photoresponsive liquid crystal polymers have very good performance in terms of photoexcitation, they have not overcome the defects of liquid crystal polymers such as difficult orientation, long time, and incomplete orientation of traditional thermal annealing methods.

Moreover, the films prepared by other traditional preparation methods such as liquid crystal cells and film laying are often single-layer films or double-layer films, and it is difficult to prepare multi-layer films.

Images