Intelligent light adjusting film based on temperature-sensitive polymer hydrogel and preparation method of intelligent light adjusting film

Abstract

The invention discloses an intelligent light adjusting film and particularly discloses an intelligent light adjusting film based on a temperature-sensitive polymer hydrogel and a preparation method of the intelligent light adjusting film. A temperature-sensitive polymer and various auxiliaries are dissolved in a polymer hydrogel body without a temperature-sensitive effect to obtain the intelligent light adjusting film with a certain mechanical strength and good temperature sensitivity. The temperature-sensitive polymer, the various auxiliaries, a water-solubility monomer, a cross-linking agent and the like are prepared into an aqueous solution, an initiator is added into the aqueous solution to polymerize the solution to obtain the intelligent light adjusting film. The preparation method of the intelligent light adjusting film is simple in operation and low in cost and can be operated under room temperatures; and the obtained intelligent light adjusting film has certain strength and is good in temperature sensitivity.

Description

Technical field [0001] The invention relates to an intelligent dimming film capable of automatically adjusting light transmittance according to environmental temperature changes and a preparation method thereof, which can be applied to windows of buildings or vehicles, greenhouses or transparent roofs of certain architectural venues and Solar collectors. Background technique [0002] The effective daylighting of indoor spaces such as buildings and vehicles and solar collectors is one of the elements of human society's daily life and the development of a green and low-carbon economy. In recent years, as countries around the world pay more attention to green energy and low-carbon economy, the effective use of solar energy and the development of energy-saving and environmentally-friendly materials have received extensive attention. For buildings and vehicles, reasonable indoor lighting and window layout design can effectively avoid unnecessary power consumption (lighting and heatin...

AI Technical Summary

Problems solved by technology

Although the above-mentioned solid hydrogels reported as temperature-sensitive polymer carriers overcome the inherent shortcomings of liquid polymer solutions, they also have some shortcomings: for example, although the PVA system can impart high elasticity and toughness, the author has confirmed that PVA has a large Molecules are prone to crystallization and precipitation in low temperature environment, especially in winter, resulting in irreversible turbidity of the film; although xanthan gum, carrageenan or gellan gum can solidify the temperature-sensitive polymer solution, they only cross-link by physical action, and their mechanical The performance is difficult to meet the requirements of being used alone as a film; although agarose hydrogel has a certain strength, it is necessary to mix all the film-forming raw materials evenly in a high-temperature environment during the preparation process, and then transfer it to a mold to cool to form a film. Sensitive polymers are aggregated, and ultrasonic vibration is required to ensure their uniform dispersion, and the entire operation needs to be completed at high temperature, which undoubtedly increases energy consumption and cumbersome operation