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Updated: Sep 29, 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

Shape memory polymer foams with tunable interconnectivity using off-the-shelf foaming components.

Natalie Marie Petryk¹, Grace Haas¹, Anand Utpal Vakil¹

¹Department of Biomedical and Chemical Engineering, BioInspired Syracuse, Syracuse University, Syracuse, New York, 13244, USA.

Journal of Biomedical Materials Research. Part A

|March 23, 2022

Summary

This summary is machine-generated.

Researchers developed a safe method to tune polyurethane shape memory polymer (SMP) foam pore structures using eco-friendly solvents. This innovation enhances SMP foams for biomedical applications like hemostatic dressings and tissue scaffolds.

Keywords:

foam polyurethane porous biomaterials shape memory polymer

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Published on: April 11, 2017

Area of Science:

Polymer Science
Biomaterials Engineering
Materials Science

Background:

Polyurethane shape memory polymer (SMP) foams offer potential in biomedical applications.
Tuning pore structure is crucial for optimizing SMP foam performance as hemostatic dressings or tissue engineering scaffolds.
Current methods using hydrofluorocarbons like Enovate (HFC-254fa) are environmentally unsustainable.

Purpose of the Study:

To investigate the use of EPA-approved solvents as safe and effective physical blowing agents for SMP foams.
To establish a method for tuning pore size and interconnectivity in SMP foams without altering their chemical or thermal properties.
To assess the impact of altered pore structures on cell and blood interactions.

Main Methods:

Incorporated off-the-shelf solvents (acetone, dimethyoxymethane/methylal, methyl formate) as physical blowing agents during SMP foam fabrication.
Varied the volume of physical blowing agents to control pore size and interconnectivity.
Characterized the resulting SMP foam structures and evaluated their interactions with biological components.

Main Results:

Increasing physical blowing agent volume led to enhanced pore interconnectivity.
SMP foam chemical and thermal properties remained consistent across different blowing agent concentrations.
Modified pore structures influenced cell and blood interactions with the foams.

Conclusions:

Utilized EPA-approved solvents as safe and effective physical blowing agents for SMP foam fabrication.
Demonstrated a facile method to tune SMP foam interconnectivity for improved biomedical applications.
This approach facilitates the commercialization of SMP foams in diverse fields.