Method for preparing core-shell reversible heat-sensitive temperature indicating composite microspheres

Abstract

The invention relates to a method for preparing core-shell reversible heat-sensitive temperature indicating composite microspheres. The method is characterized by comprising the following steps of: adding MCM-41 silicon-based mesoporous microspheres into a CoCl2 aqueous solution to prepare reversible heat-sensitive temperature indicating microspheres, and adding an emulsifier Span80 into cyclohexane to prepare an oil phase; adding the reversible heat-sensitive temperature indicating microspheres into the oil phase to prepare S / O1 emulsion; adding an emulsifier Tween80 into a polyvinyl alcohol aqueous solution to prepare a water phase; dripping the S / O1 emulsion into the water phase to prepare S / O1 / W inner emulsion; adding the emulsifier Span80 into the cyclohexane to prepare a dispersed phase, and dripping the S / O1 / W inner emulsion and a cross-linking agent glutaraldehyde into the dispersed phase to prepare S / O1 / W / O2 composite emulsion; and reacting the composite emulsion with stirring, performing suction filtering, washing, and drying to obtain the core-shell reversible heat-sensitive temperature indicating composite microspheres. The microspheres sensitively indicate temperature and are high in reversibility, environmental adaptability and reusability.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a method for preparing a core-shell reversible thermosensitive temperature-indicating composite microsphere, which is an inorganic reversible thermosensitive temperature-indicating material cobalt chloride hexahydrate (CoCl 2 ·6H 2 O) preparation method of core-shell composite microspheres. Background technique [0002] Since the 1980s, the development of temperature-indicating materials tends to be low temperature and reversible. In particular, inorganic reversible thermosensitive temperature-indicating materials are widely used in many fields such as industry, publishing and printing, textile and clothing, medical treatment and daily life because of their advantages such as good thermochromism and reversibility, bright colors, simple synthesis process, and low cost. application prospects. where CoCl 2 ·6H 2 O is a very representative low temperature inorganic ...

AI Technical Summary

Problems solved by technology

[0007] In order to avoid the deficiencies of the prior art, the present invention proposes a method for preparing a core-shell reversible thermosensitive temperature-indicating composite microsphere to solve the problem of the temperature-indicating microcapsules with liquid as the core material in the prior art on the properties of the shell material and The experimental conditions are demanding, the mechanical strength is low, the extrusion is not resistant, the capsule wall is porous, and the shell is broken.