Thermosensitive hydrogel for body temperature monitoring, and preparation method and application thereof

By adjusting the amounts of crosslinking agent, thermosensitive monomer, and ionic liquid, a thermosensitive hydrogel was prepared that achieves temperature sensitivity and controllable transparency changes in the body temperature range. This solves the problems of accuracy and slow response time of existing thermosensitive hydrogels in body temperature monitoring, and also has the functions of visual colorimetry and remote transmission.

CN122167645APending Publication Date: 2026-06-09XI'AN POLYTECHNIC UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XI'AN POLYTECHNIC UNIVERSITY
Filing Date
2026-03-25
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing thermosensitive hydrogels are difficult to use accurately to the body temperature range in body temperature monitoring, and have slow response time and poor visualization effect.

Method used

By adjusting the content of crosslinking agent and thermosensitive monomer, combined with the amount of ionic liquid, a thermosensitive hydrogel was prepared, which has temperature sensitivity and controllable transparency changes in the body temperature range, and can be visualized and colorimetrically monitored by a thermochromic agent.

Benefits of technology

It achieves sensitive response and accurate monitoring of body temperature, and has dual functions of visual colorimetric naked-eye monitoring and remote body temperature transmission, making it suitable for wearable sensors.

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Abstract

This invention belongs to the field of temperature sensing technology and discloses a thermosensitive hydrogel for body temperature monitoring, its preparation method, and its applications. The preparation method includes: preparing a thermosensitive regulating monomer solution containing a thermochromic agent with a color-changing range of 38℃-40℃; preparing a crosslinking solution; mixing the thermosensitive regulating monomer solution and the crosslinking solution to obtain a mixture; adding an initiating solution to the mixture, stirring evenly, and pouring it into a mold for standing to obtain the thermosensitive hydrogel. The thermosensitive hydrogel prepared by this invention has characteristics such as temperature response in the body temperature range, colorimetric monitoring, persistent adhesion, and cycle stability. It is suitable for monitoring the body temperature of infants, critically ill patients, etc., in the form of health indicator bracelets or patches. It is also applicable to applications in temperature-sensitive jewelry, anti-counterfeiting encryption, and temperature-sensing early warning systems for electronic devices.
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