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Starch as a reinforcement agent for poly(ionic liquid) hydrogels from deep eutectic solvent via frontal

Yapeng Chen¹, Shengfang Li², Shilin Yan³

¹School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China; School of Chemistry and Chemical Engineering, Hubei Polytechnic University, Huangshi, 435003, China.

Carbohydrate Polymers

|April 16, 2021

Summary

New conductive starch/poly(ionic liquid) hydrogels were created using polymerizable deep eutectic solvents (DES) and frontal polymerization (FP). These composite hydrogels exhibit enhanced mechanical strength and electrical conductivity, with water absorption further boosting conductivity.

Keywords:

Composite hydrogel Conductivity Deep eutectic solvent Frontal polymerization Starch

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Area of Science:

Materials Science
Polymer Chemistry
Electrochemistry

Background:

Deep eutectic solvents (DES) offer a tunable platform for developing novel polymeric materials.
Frontal polymerization (FP) enables rapid and efficient synthesis of polymers.
Starch, a biodegradable polysaccharide, can be incorporated to modify material properties.

Purpose of the Study:

To synthesize and characterize conductive starch/poly(ionic liquid) hydrogels using a polymerizable DES via FP.
To investigate the influence of starch content on the hydrogels' properties.
To evaluate the mechanical and electrical conductivity performance of the composite hydrogels.

Main Methods:

Investigated starch solubility and dispersibility in a polymerizable DES.
Synthesized starch/poly(ionic liquid) composite hydrogels using frontal polymerization.
Characterized mechanical properties (tensile and compressive strength) and electrical conductivity.

Main Results:

Starch was successfully dispersed within the DES, forming composite hydrogels.
Composite hydrogels showed significantly enhanced tensile strength (3.07 times increase) and compressive strength (6 times increase) compared to pure poly(ionic liquid) hydrogels.
The hydrogels exhibited good electrical conductivity, which was further enhanced by water absorption.

Conclusions:

Starch incorporation via FP in DES leads to robust and conductive composite hydrogels.
Strong interfacial interactions between starch and the polymer network contribute to improved mechanical properties.
These novel hydrogels hold potential for applications requiring conductive and mechanically stable materials.