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Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

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"Self-Defensive" Antifouling Zwitterionic Hydrogel Coatings on Polymeric Substrates.

Jing Zhang¹, Minmin Wu¹, Pai Peng¹

¹College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang310014, P. R. China.

ACS Applied Materials & Interfaces

|December 9, 2022

Summary

New zwitterionic hydrogel coatings offer "self-defensive" antifouling properties for medical devices. These coatings release antibiotics and degrade to remove bacteria, enhancing patient safety and preventing infections.

Keywords:

antibacterial antifouling bacteria-responsive hydrogel coatings self-defensive zwitterionic

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Area of Science:

Biomaterials Science
Polymer Chemistry
Infectious Disease Prevention

Background:

Biofouling on medical devices like sensors and catheters leads to iatrogenic infections, posing significant risks to patient health.
Effective prevention of bacterial adhesion and infection on medical device surfaces is crucial.

Purpose of the Study:

To develop and investigate novel "self-defensive" antifouling zwitterionic hydrogel coatings for polymeric medical devices.
To evaluate the antibacterial efficacy, antifouling properties, and biocompatibility of these advanced coatings.

Main Methods:

Preparation of zwitterionic polysulfobetaine methacrylate (PSBMA) hydrogel coatings via network interpenetration.
Assessment of bacterial adhesion resistance, triggered gentamicin sulfate (GS) release in acidic conditions, and hyaluronidase-induced coating degradation.
In vitro and in vivo evaluation of antibacterial performance and biocompatibility.

Main Results:

The PSBMA hydrogel coatings demonstrated significant resistance to bacterial adhesion.
A dual-action mechanism was observed: GS release to kill adhered bacteria and coating degradation to remove them.
The coatings exhibited promising in vitro and in vivo antibacterial activity and good biocompatibility.

Conclusions:

The developed self-defensive antifouling zwitterionic hydrogel coatings show great potential for application on polymeric medical devices.
This innovative approach effectively combats biofouling and bacterial infections, improving medical device safety.
The study highlights a promising strategy for next-generation antimicrobial medical device surfaces.