Thermoresponsive hydrogels in biomedical applications

Area of Science:

• Polymer Science
• Biomaterials Engineering
• Materials Science

Background:

• Environmentally responsive hydrogels offer tunable properties.
• Thermoresponsive hydrogels gel upon temperature change, eliminating external triggers.
• Their ability to swell in situ under physiological conditions makes them promising for biomedical uses.

Purpose of the Study:

• To review aqueous polymer solutions exhibiting temperature-induced gelation.
• To focus on hydrogels suitable for biomedical applications.
• To explore various polymer systems for thermoresponsive hydrogel development.

Main Methods:

• Literature review of thermoresponsive hydrogels.
• Analysis of hydrogel systems based on natural polymers.
• Examination of synthetic polymers like N-isopropylacrylamide and block copolymers.

Main Results:

• Aqueous solutions of specific polymers transition from liquid to gel with temperature shifts.
• Hydrogels based on natural polymers, N-isopropylacrylamide, PEO-PPO-PEO, and PEG-biodegradable polyester copolymers exhibit thermoresponsive behavior.
• These materials are liquid at room temperature and gel at physiological temperatures.

Conclusions:

• Thermoresponsive hydrogels are versatile biomaterials.
• Their temperature-triggered gelling property is advantageous for biomedical administration.
• Diverse polymer chemistries enable the development of tailored thermoresponsive hydrogels.