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Antifreezing Heat-Resistant Hollow Hydrogel Tubes
Yaqing Tu1, Qing Chen1, Shumin Liang1
1School of Chemistry and Molecular Engineering , East China Normal University , Shanghai 200241 , People's Republic of China.
ACS Applied Materials & Interfaces
|May 1, 2019
Summary
Researchers developed novel hollow hydrogel tubes that maintain flexibility in extreme temperatures. These antifreezing, heat-resistant tubes offer a simple method for controlled release applications in diverse environments.
Area of Science:
- Materials Science
- Polymer Chemistry
- Biomaterials Engineering
Background:
- Hollow hydrogel tubes are valuable for biomedical scaffolds, soft robotics, and carriers.
- Existing methods for preparing hollow hydrogel tubes often require templates or complex devices and struggle with extreme temperature stability.
- Endowing hollow hydrogel tubes with both antifreezing and heat-resistant properties remains a significant challenge.
Purpose of the Study:
- To develop a simple, template-free protocol for fabricating hollow hydrogel tubes with exceptional thermal stability.
- To functionalize these tubes to withstand extreme temperatures ranging from -70 to 120 °C while maintaining flexibility and structural integrity.
- To demonstrate the potential of these antifreezing, heat-resistant hollow hydrogel tubes as controlled-release carriers.
Main Methods:
- Sodium alginate film strips were immersed in an aqueous mixture of calcium carbonate (CaCO3), calcium chloride (CaCl2), sodium bicarbonate (NaHCO3), and hydrochloric acid (HCl) for 30 minutes to form hollow tubes.
- Glycerol and poly(ethylene glycol) were used to functionalize the hydrogel tubes, imparting antifreezing and heat-resistant properties.
- The structural integrity and flexibility of the tubes were tested across a temperature range of -70 to 120 °C.
Main Results:
- A novel, template-free method successfully produced hollow hydrogel tubes within 30 minutes.
- The functionalized hollow hydrogel tubes exhibited remarkable stability and flexibility in temperatures ranging from -70 °C to 120 °C.
- Controlled release of a mothball (1.1 mg/h) and sustainable release of honey (over 800 min) were demonstrated, showcasing carrier capabilities.
Conclusions:
- This study presents the first report of antifreezing, heat-resistant hollow hydrogel tubes manufactured via a simple, template-free protocol.
- The developed hydrogel tubes demonstrate significant potential as carriers for controlled release applications in extreme cold and hot environments.
- The controlled release capabilities reduce environmental hazards and maintain efficacy for pest control and ant capture.
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