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Related Experiment Video

Updated: May 20, 2025

Synthesis of Thermogelling PolyN-isopropylacrylamide-graft-chondroitin Sulfate Composites with Alginate Microparticles for Tissue Engineering

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Published on: October 26, 2016

Improving Complex Coacervate Tissue Adhesive Performance Using Bridging Polymer Chains.

Ayla N Kwant^1,2,3,4, Julien S Es Sayed^1,5, Nawal Aledlbi^6,7

¹Polymer Science, Zernike Institute for Advanced Materials (ZIAM), University of Groningen, Groningen 9747AG, The Netherlands.

Biomacromolecules

|March 25, 2025

Summary

This summary is machine-generated.

Bridging polymers enhance complex coacervate adhesives (CCAs) for tissue repair. Pretreatment with poly(allylamine hydrochloride) (pAH) improved adhesion on dynamic tissues by forming a bridging layer, increasing robustness.

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Published on: August 19, 2015

Area of Science:

Biomaterials Science
Polymer Chemistry
Tissue Engineering

Background:

Complex coacervates (CCAs) show promise as tissue adhesives due to tunable properties and wet adhesion.
Maintaining stable adhesion on soft, dynamic biological tissues is a significant challenge for current CCAs.

Purpose of the Study:

To investigate the use of a bridging polymer to enhance the adhesive properties of a poly(allylamine hydrochloride) (pAH) and polysulfopropyl methacrylate (pSPMA) based CCA.
To understand the mechanism by which bridging polymers improve CCA adhesion on biological substrates.

Main Methods:

Fabrication of a CCA from pAH and pSPMA, which solidifies via salt concentration changes.
Pretreatment of model hydrogels and biological tissues with pAH or pSPMA.
Measurement of adhesion energy and analysis of interfacial polymer distribution.

Main Results:

Pretreatment with pAH, but not pSPMA, significantly enhanced adhesion energy on both hydrogels and tissues.
A polymer-rich bridging layer formed at the interface due to pAH accumulation in superficial layers.
The pAH bridging layer increased the CCA's ability to withstand deformation before failure.

Conclusions:

Bridging polymers, specifically pAH, can significantly improve the adhesion of CCAs on dynamic tissues.
The mechanism involves the formation of an interfacial bridging layer that enhances mechanical robustness.
This strategy holds potential for advancing CCAs and other biomedical adhesives.