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Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application

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Published on: March 8, 2019

Unprecedented Strength Polysiloxane-Based Polyurethane for 3D Printing and Shape Memory.

Wencai Wang^1,2,3, Siao Sun¹, Shikai Hu^1,2,3

¹Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, China.

ACS Applied Materials & Interfaces

|January 5, 2022

Summary

This summary is machine-generated.

Researchers developed novel polysiloxane-based polyurethane (Si-TPU) materials with significantly enhanced strength. This breakthrough offers improved performance for biomedical applications and advanced manufacturing processes.

Keywords:

3D printing high strength microphase separation polysiloxane-based polyurethane shape memory

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Area of Science:

Polymer Science
Materials Science
Biomedical Engineering

Background:

Thermoplastic polysiloxane-based polyurethane (Si-TPU) offers combined properties of polysiloxane and polyurethane.
Traditional Si-TPU structures exhibit insufficient mechanical strength for many applications.

Purpose of the Study:

To enhance the mechanical strength of Si-TPU.
To explore new structural designs for improved Si-TPU properties.
To assess the potential of modified Si-TPU for biomedical applications.

Main Methods:

Designed a novel polysiloxane-based soft segment (SS) with terminal urethane groups.
Synthesized a series of Si-TPUs using the designed SS, isophorone diisocyanate, and 1,4-butanediol.
Characterized the microphase separation, mechanical strength, and functional properties of the synthesized Si-TPUs.

Main Results:

The structural modification improved SS polarity and promoted regular hydrogen bonding.
The resulting Si-TPUs demonstrated excellent microphase separation and high tensile strength (up to 20.3 MPa).
The materials exhibited repeatable processing, non-cytotoxicity, shape memory properties, and 3D printing capabilities.

Conclusions:

The novel Si-TPU design significantly enhances material strength, surpassing existing Si-based polymers.
These advanced Si-TPUs hold considerable promise for diverse biomedical applications.
The improved properties enable advanced manufacturing techniques like 3D printing.