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Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning

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Thermoresponsive supramolecular dendronized polymers.

Jiatao Yan¹, Wen Li, Kun Liu

¹Department of Polymer Materials, Shanghai University, Chengzhong Street 20, Shanghai 201800, China.

Chemistry, an Asian Journal

|September 10, 2011

Summary

Novel supramolecular dendronized polymers were created using host-guest chemistry. These materials exhibit tunable thermoresponsive behavior in water, with properties influenced by dendron generation and concentration.

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Area of Science:

Polymer Chemistry
Supramolecular Chemistry
Materials Science

Background:

Supramolecular polymers offer tunable properties and easy modification.
Dendronized polymers provide bulky architectures.
Combining these concepts can lead to novel materials.

Purpose of the Study:

To synthesize and characterize novel side-chain supramolecular dendronized polymethacrylates.
To investigate the host-guest interactions driving supramolecular polymer formation.
To explore the thermoresponsive behavior of these new materials.

Main Methods:

Synthesis of linear polymethacrylates with beta-cyclodextrin (host) and oligoethylene glycol dendrons (guest).
(1)H NMR spectroscopy and dynamic light scattering to confirm supramolecular assembly.
UV/Vis spectroscopy and temperature-varied (1)H NMR to study thermoresponsiveness.

Main Results:

Successful formation of supramolecular polymers via host-guest interaction between beta-cyclodextrin and adamantyl-cored dendrons (G1 and G2).
Enhanced water solubility upon supramolecular formation.
Demonstrated thermoresponsive behavior, with phase transitions influenced by dendron generation and concentration.

Conclusions:

The novel supramolecular dendronized polymers are successfully synthesized and exhibit tunable thermoresponsive properties.
The generation of the dendron significantly impacts the thermoresponsive behavior.
Host-guest complex decomposition occurs during heating, affecting phase transitions.