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Updated: Jan 19, 2026
Author Spotlight: Advancing Antimicrobial Resistance Research with Innovative Approaches and Synthetic Compounds
Published on: September 27, 2024
In situ synthesis of biocompatible imidazolium salt hydrogels with antimicrobial activity
Jingshi Liang1, Jianghua Li1, Chao Zhou2
1College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha 410114, China.
Abstract:
Infection with antibiotic-resistant bacteria is becoming a significant public health risk. In this study, we synthesized a series of imidazolium salt (IMS)-containing polymers and hydrogels and tested their antimicrobial properties against both gram-positive (Staphylococcus aureus and MRSA) and gram-negative (Escherichia coli and PA01) bacteria. IMSs were either grafted as side chains or functionalized in the main chain of linear polymers, which demonstrated antimicrobial properties with minimum inhibitory concentrations as low as 2 μg/mL. Similarly, the optimized IMS-containing hydrogel effectively killed MRSA with a 96.1% killing efficiency and inhibited the growth of PA01. These hydrogels also demonstrated high performance in terms of mechanical property (compressive strength >2 MPa) and were noncytotoxic toward human dermal fibroblasts. STATEMENT OF SIGNIFICANCE: A series of polyimidazolium hydrogels were fabricated with acrylamide monomer and poly(ethylene glycol) dimethacrylate by thermal-initiated polymerization. These hydrogels completely killed methicillin-resistant Staphylococcus aureus and inhibited the growth of Pseudomonas aeruginosa. More importantly, these hydrogels demonstrated adequate mechanical property and biocompatibility. These antimicrobial hydrogels have the potential as biomaterials for preventing infections associated with multidrug-resistant bacteria.
Insights
New imidazolium salt (IMS)-containing polymers and hydrogels show potent antimicrobial activity against resistant bacteria like MRSA. These biocompatible materials offer promising solutions for preventing multidrug-resistant bacterial infections.
Area of Science:
- Materials Science
- Polymer Chemistry
- Antimicrobial Research
Background:
- Antibiotic-resistant bacteria pose a growing global health threat.
- Development of novel antimicrobial materials is crucial for combating infections.
Purpose of the Study:
- To synthesize and evaluate imidazolium salt (IMS)-containing polymers and hydrogels for antimicrobial applications.
- To assess the efficacy of these materials against Gram-positive and Gram-negative bacteria, including multidrug-resistant strains.
Main Methods:
- Synthesis of IMS-containing polymers with side-chain grafting or main-chain functionalization.
- Fabrication of IMS-containing hydrogels via thermal-initiated polymerization.
- Antimicrobial testing using minimum inhibitory concentrations (MICs) and killing efficiency assays.
- Evaluation of mechanical properties (compressive strength) and cytotoxicity.
Main Results:
- IMS-containing polymers exhibited antimicrobial properties with MICs as low as 2 μg/mL.
- Optimized IMS-containing hydrogels achieved 96.1% killing efficiency against MRSA and inhibited PA01 growth.
- Hydrogels demonstrated excellent mechanical strength (>2 MPa) and were non-cytotoxic to human dermal fibroblasts.
Conclusions:
- Synthesized IMS-containing polymers and hydrogels display significant antimicrobial activity against resistant bacteria.
- These materials possess favorable mechanical properties and biocompatibility, making them suitable for biomaterial applications.
- The developed hydrogels show potential for preventing infections caused by multidrug-resistant bacteria.
