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Updated: Jun 3, 2025

Microfluidic Fabrication of Polymeric and Biohybrid Fibers with Predesigned Size and Shape

Microfluidic Fabrication of Polymeric and Biohybrid Fibers with Predesigned Size and Shape

Published on: January 8, 2014

Strategy for Fabricating Multiple-Shape Memory Polymeric Materials Based on Solid State Mixing.

Salim-Ramy Merouani^1,2, Roman Kulagin³, Vladislav Bondarenko⁴

¹The Bio-Med-Chem Doctoral School of the University of Lodz and Lodz Institutes of the Polish Academy of Sciences, Banacha 12/16, Lodz 90-237, Poland.

ACS Macro Letters

|January 12, 2025

Summary

Researchers developed a novel method for creating advanced shape memory polymers (SMPs) by solid-state mixing immiscible polymers. This technique enhances both shape memory properties and mechanical performance, offering tunable transition temperatures.

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

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Last Updated: Jun 3, 2025

Microfluidic Fabrication of Polymeric and Biohybrid Fibers with Predesigned Size and Shape

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Published on: January 8, 2014

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

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

Published on: October 23, 2015

Area of Science:

Materials Science
Polymer Science
Nanotechnology

Background:

Multiple shape memory polymers (SMPs) are typically made from immiscible blends with specific morphologies or miscible blends with nanoscale heterogeneity.
Existing methods face challenges in achieving optimal homogeneity and performance.

Purpose of the Study:

To propose a new strategy for fabricating multiple-SMPs through homogeneous solid-state mixing of immiscible polymers.
To investigate the impact of nanoscale mixing on shape memory and mechanical properties.

Main Methods:

Utilized high pressure torsion (HPT) to process immiscible polymer blends in the solid state.
Achieved nanoscale homogeneity (40-95 nm) by applying high pressure and shear deformation.
Selected polypropylene (PP) and polystyrene (PS) as model immiscible polymers.

Main Results:

Demonstrated homogeneous mixing of immiscible polymers down to the nanoscale.
Observed significant improvements in shape memory effect and mechanical performance compared to traditional methods.
The HPT-processed 50% PP/50% PS blend exhibited an excellent triple shape memory effect with high shape fixation (∼94-95%) and recovery (∼85-95%).

Conclusions:

Solid-state mixing under high pressure and shear is an effective method for creating advanced multiple-SMPs.
The transition from immiscible to miscible blends at the nanoscale enhances material properties.
This approach offers tunable transition temperatures and superior performance for shape memory applications.