Related Experiment Video
Updated: Jun 28, 2025
07:47
Author Spotlight: An Antimicrobial Fabric Using Nano-Herbal Encapsulation of Essential Oils
Published on: April 7, 2023
7.9K
Regulating molecular brush structure on cotton textiles for efficient antibacterial properties.
1School of Chemistry, Key Laboratory of Advanced Technologies of Materials (Ministry of Education), Southwest Jiaotong University, Chengdu 610031, China; Research Institute of Frontier Science, Southwest Jiaotong University, Chengdu 610031, China.
International Journal of Biological Macromolecules
|April 11, 2024
Summary
New molecular brush structures on cotton textiles offer long-term, broad-spectrum antimicrobial protection. Optimizing alkyl chains and quaternary ammonium sites enhances antibacterial efficiency against common bacteria like E. coli and S. aureus.
Area of Science:
- Materials Science
- Textile Chemistry
- Biotechnology
Background:
- Developing durable and effective antimicrobial textiles is crucial for public health and infection control.
- Existing antimicrobial treatments often face challenges with longevity and broad-spectrum efficacy.
- Molecular brush structures offer a promising platform for advanced material functionalities.
Purpose of the Study:
- To engineer cotton textiles with molecular brush structures for enhanced, long-lasting antimicrobial properties.
- To investigate the role of alkyl chain length and quaternary ammonium sites in antibacterial performance.
- To elucidate the mechanism behind the antimicrobial activity of these modified textiles.
Main Methods:
- Synthesis and characterization of molecular brush structures on cotton textiles using [3-(N,N-Dimethylamino)propyl]trimethoxysilane and cetyl modification.
- Evaluation of antibacterial efficiency against Gram-negative (E. coli) and Gram-positive (S. aureus) bacteria.
- Proteomic analysis to understand cellular responses to the antimicrobial treatment.
- Theoretical calculations to explore charge enhancement and structural distortion effects.
Main Results:
- Optimized molecular brush structures (CT-DM-16) achieved over 99% antibacterial efficiency against E. coli and S. aureus.
- Alkyl-chain grafting significantly improved antibacterial activity, particularly against S. aureus.
- Proteomic data indicated increased contributions of cytoskeleton and membrane-enclosed lumen proteins, suggesting enhanced bacterial cell disruption.
- Theoretical calculations confirmed that alkyl-chain grafting enhances positive charge density on nitrogen sites.
Conclusions:
- Molecular brush structures provide an effective strategy for developing highly efficient and durable antimicrobial cotton textiles.
- The combination of positive nitrogen sites and alkyl chains is key to the broad-spectrum antibacterial mechanism.
- Understanding the regulation mechanism guides the development of next-generation practical antimicrobial materials.
