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Photodegradable Hydrogel Interfaces for Bacteria Screening, Selection, and Isolation
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One-step surface modification strategy with composition-tunable microgels: From bactericidal surface to cell-friendly

Jie Shen1, Rui Chen1, Jinghong Wang1

  • 1State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China.

Colloids and Surfaces. B, Biointerfaces
|February 3, 2022
PubMed
Summary
This summary is machine-generated.

Researchers developed novel poly(N-isopropylacrylamide) microgels (ZQP) for biomaterial surface modification. These microgels offer tunable anti-fouling and bactericidal properties, creating effective and biocompatible surfaces resistant to bacterial adhesion and challenging treatments.

Keywords:
Anti-bacterialCell-friendlyFilm-formingPNIPAm microgelsSurface modification strategy

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Area of Science:

  • Materials Science
  • Biomaterials Engineering
  • Surface Chemistry

Background:

  • Soft colloidal particles are effective biomaterial surface modifiers, offering film-forming, chemical, and biological functionalities.
  • Controlling microgel properties for optimized film formation and biological function remains a challenge in surface modification.
  • Existing methods lack fine-tuned control over particle characteristics for specific anti-fouling and bactericidal applications.

Purpose of the Study:

  • To synthesize and characterize poly(N-isopropylacrylamide) microgels (ZQP) with tunable anti-fouling and bactericidal properties.
  • To investigate the relationship between microgel composition and film-forming capabilities for surface modification.
  • To evaluate the anti-bacterial efficacy, cytocompatibility, and durability of ZQP-coated biomaterial surfaces.

Main Methods:

  • Preparation of poly(N-isopropylacrylamide) microgels (ZQP) incorporating zwitterionic (Z) and quaternary ammonium salt (Q) components.
  • Fine-tuning of Z and Q content to control microgel particle size, size distribution, charge, and film-forming properties.
  • Coating various substrates (silicon wafer, PDMS, PU, PVC) and evaluating anti-bacterial activity, cytocompatibility, and resistance to chemical/mechanical treatments.

Main Results:

  • Microgel composition was successfully tuned to control particle properties and film formation.
  • ZQP films demonstrated anti-adhesion and contact-killing effects against Escherichia coli (E. coli).
  • Coated substrates exhibited long-term antibacterial activity and durability against various treatments, with excellent cytocompatibility for L929 cells.

Conclusions:

  • The developed ZQP microgels provide an effective strategy for creating bactericidal and cytocompatible surfaces.
  • Microgel composition can be precisely regulated to fine-tune surface properties for specific applications.
  • This surface modification approach is versatile and applicable to a wide range of substrates.