Method for preparing nano fluorescence thermometer

Abstract

The invention belongs to the field of high polymer materials, and relates to a method for preparing a nano fluorescence thermometer based on thermosensitive controllable nano microspheres with fluorescence property. The method comprises the following steps of: synthesizing core / shell-structured polymer nano microspheres with thermosensitive characteristic; and compounding fluorescent molecules with aggregation-induced emission (AIE) property into the shell layers of the microspheres to realize sudden fluorescence enhancement of the fluorescent molecules so as to obtain the thermosensitive controllable nano hydrogel microspheres with the fluorescence property, wherein the fluorescence intensity of the microspheres is linearly reversibly reduced or enhanced with the rise and reduction of the ambient temperature, and the microspheres have high stability in a range of 2 to 95DEG C. The thermosensitive hydrogel material has high application value and good prospect in the aspects such as nano fluorescence thermometers, nano-biomaterials, multi-response sensors and the like.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a method for preparing a fluorescent nanometer thermometer based on nanometer microspheres with fluorescent properties and temperature sensitivity controllable. Background technique [0002] Smart materials are a new type of functional materials that can perceive external stimuli, judge and process them appropriately, and can be executed by themselves. It is one of the important directions for the development of modern high-tech new materials and will support the development of high-tech in the future. As a soft and wet material in smart polymer materials, polymer gels have attracted extensive attention from researchers in recent years. Among them, environmentally sensitive hydrogels are often called smart hydrogels, which means that they can sense small changes or stimuli in the external environment, such as temperature, pH value, light, electricity, solvent composition, ionic st...

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Problems solved by technology

This is mainly due to the fact that in the aggregated state, the internal rotation of AIE molecules is greatly restricted, the non-radiative transition is greatly reduced, and at the same time, the quantum efficiency of fluorescence is greatly improved.

However, under normal circumstances, AIE molecules can only have good luminescence enhancement properties in macroscopic aggregation states such as polymer films, crystals, and poor solvents. When they are uniformly dispersed in good solvents, almost no fluorescence can be detected, which is severely limited. The applicability of AIE molecules in practical fields

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