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Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold

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Robust, Reprocessable, and Reconfigurable Cellulose-Based Multiple Shape Memory Polymer Enabled by Dynamic

Wentao Wang¹, Fei Wang, Cheng Zhang

¹CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230052, P. R. China.

ACS Applied Materials & Interfaces

|October 4, 2019

Summary

Researchers developed a novel cellulose-based polymer with quadruple-shape memory capacity. This sustainable material offers robust mechanical strength, reprocessability, and reconfigurability for advanced applications.

Keywords:

cellulose-grafted copolymers freestanding 3D shape metal−ligand bonds multiple shape memory polymer solid-state plasticity

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Area of Science:

Materials Science
Polymer Chemistry
Biomass Utilization

Background:

Smart materials, particularly multiple shape memory polymers (SMPs), are of great interest for applications in textiles, actuators, and aerospace.
Challenges exist in designing sustainable SMPs with robust mechanical strength, reprocessability, and reconfigurability.

Purpose of the Study:

To synthesize a novel cellulose-graft-poly(n-butyl acrylate-co-1-vinylimidazole) copolymer (Cell-g-(BA-co-VI)) with multiple shape memory capacities.
To explore the potential of dynamic metallosupramolecular cross-linking for creating advanced SMPs.
To achieve robust, reprocessable, and reconfigurable thermoplastic SMPs from a biomass source.

Main Methods:

Addition-fragmentation chain transfer polymerization (RAFT) for copolymer synthesis.
Metallosupramolecular cross-linking utilizing metal ion-imidazole coordination.
Atomic force microscopy (AFM) for microscopic analysis of polymer network structure.

Main Results:

A cellulose-based copolymer (Cell-g-(BA-co-VI)) exhibiting quadruple-shape memory capacity was successfully synthesized.
The dynamic coordination bonds enabled highly tunable mechanical properties and excellent solid-state plasticity.
Phase segregation of metal-ligand clusters from grafted copolymers was observed, acting as network points.

Conclusions:

The developed architecture provides a novel approach to next-generation SMPs based on a cellulose backbone.
This design facilitates the creation of robust, reprocessable, and reconfigurable thermoplastic SMPs, overcoming limitations of other methods.
The study demonstrates a high-value application of cellulose in advanced functional materials through synergistic property integration.