Shape memory fluorescent polyurethane resin, its preparation method and application

By optimizing the molecular structure of polyurethane resin and introducing fluorescence properties, a shape memory fluorescent polyurethane resin with both high strength and fluorescence response was prepared, which solved the problem of insufficient fluorescence intensity and stability in the existing technology and expanded its application range.

CN119798603BActive Publication Date: 2026-06-12LANZHOU INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
LANZHOU INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
Filing Date
2025-01-13
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

Existing shape memory PU resins are lacking in fluorescence intensity and stability, which limits their application in fields such as optical sensing and self-diagnosis.

⚗Method used

By introducing the coordination reaction of 5,5′-diamino-2,2′-bipyridine and europium salt into the preparation method, the molecular structure of polyurethane resin was optimized, and combined with fluorescence properties, a shape memory fluorescent polyurethane resin with high tensile strength, elongation at break and toughness was prepared.

🎯Benefits of technology

It achieves the ability to recover a predetermined shape under external stimuli while exhibiting a strong and stable fluorescence response, thus expanding its application potential in fields such as intelligent sensing, environmental monitoring, and medical diagnosis.

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Abstract

The present application belongs to the technical field of shape memory materials, and particularly relates to a shape memory fluorescent polyurethane resin, a preparation method and application thereof. The polyethylene dihydric alcohol, hexamethylene diisocyanate, organic tin catalyst and organic solvent are mixed to perform nucleophilic addition reaction, the obtained polyurethane prepolymer reaction solution and 5,5'-diamino-2,2'-dipyridyl are mixed to perform addition reaction, the obtained addition reaction solution and europium salt are mixed to perform coordination reaction, and the coordination reaction solution is obtained. Finally, the solvent of the coordination reaction solution is removed to obtain the shape memory fluorescent polyurethane resin. The shape memory fluorescent polyurethane resin provided by the present application can exhibit strong fluorescent response under external stimulation, has high fluorescent intensity and light stability, and has excellent mechanical properties (including tensile strength, elongation at break and toughness), and has wide application prospect in the fields of intelligent sensing, medical diagnosis and environmental monitoring.
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