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Silk Fibroin-Based Multiple-Shape-Memory Organohydrogels.

Cigdem Buse Oral¹, Esra Su², Oguz Okay¹

¹Department of Chemistry, Istanbul Technical University, Maslak, Istanbul 34469, Turkey.

ACS Applied Materials & Interfaces

|October 7, 2024

Summary

This summary is machine-generated.

Researchers developed novel silk fibroin-based organohydrogels (OHGs) with tunable, multistage shape-memory properties. These versatile materials offer adjustable transition temperatures for diverse applications.

Keywords:

emulsion long-chain saturated hydrocarbons n-octadecyl acrylate organohydrogels shape memory silk fibroin

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Area of Science:

Materials Science
Polymer Chemistry
Biomaterials Engineering

Background:

Organohydrogels (OHGs) possess unique hydrophilic and hydrophobic domains, enabling remarkable properties and versatility.
Silk fibroin (SF) is a biocompatible protein with potential for advanced material fabrication.

Purpose of the Study:

To develop a simple, cost-effective method for fabricating silk fibroin-based organohydrogels (SF-OHGs).
To engineer SF-OHGs with multistage switching mechanics, tunable viscoelasticity, and multiple-shape-memory behaviors.

Main Methods:

Fabrication of SF-OHGs via emulsion photopolymerization of n-octadecyl acrylate (C18A) and long-chain hydrocarbons (HCs) in an aqueous SF solution.
Tuning transition temperatures by altering HC chain length and mass proportion.
Characterization of shape-memory properties, including triple- and quintuple-shape memory effects.

Main Results:

Successfully synthesized nonswelling SF-OHGs with multiple-shape-memory behavior.
Achieved tunable transition temperatures ranging from 7 to 70 °C by modifying HC components.
Demonstrated triple- and quintuple-shape memory effects in OHGs with combined poly(C18A) and HC microinclusions.

Conclusions:

The developed method provides a facile route to engineer SF-OHGs with controllable shape-memory properties.
Tunable transition temperatures and multistage shape-memory capabilities make these SF-OHGs promising for advanced applications.
The combination of SF, C18A, and various HCs offers a versatile platform for designing functional organohydrogels.