Superhydrophobic antibacterial cotton textiles

• Published in: Journal of colloid and interface science Vol. 351; no. 1; pp. 293 - 298
• Main Authors: Shateri Khalil-Abad, Mohammad, Yazdanshenas, Mohammad E.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Inc 01.11.2010; Elsevier
• Subjects: Anti-Bacterial Agents - chemical synthesis; Anti-Bacterial Agents - chemistry; Anti-Bacterial Agents - pharmacology; Antibacterial; Chemistry; Contact angle; Cotton Fiber; Cotton textiles; Escherichia coli - drug effects; Exact sciences and technology; General and physical chemistry; Hydrophobic and Hydrophilic Interactions; Microbial Sensitivity Tests; Octyltriethoxysilane; Organometallic Compounds - chemical synthesis; Organometallic Compounds - chemistry; Organometallic Compounds - pharmacology; Particle Size; Silver - chemistry; Silver - pharmacology; Silver particles; Solid-liquid interface; Staphylococcus aureus - drug effects; Superhydrophobic; Surface physical chemistry; Surface Properties; Textiles; Cotton textiles; Octyltriethoxysilane; Superhydrophobic; Contact angle; Antibacterial; Silver particles; Water; Modification; Ascorbic acid; Water drop; Textile; Potassium hydroxide; Roughness; Transition metal; Hydrophobicity; Cotton; Droplet; Particle; Chemical reduction; Substrate; Silver; Antibacterial agent; Cotton fiber; Fabric
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2010.07.049

SEM images of silver particle-covered KOH-treated cotton fiber after OTES modification. The image on the right is higher-magnification. [Display omitted] ► Superhydrophobic cotton textiles using silver particles. ► Surfaces prepared showed a sticky property. ► The modified cotton has potent antibacterial activity toward both Gram-positive and Gram-negative bacteria. We present a facile and effective method to prepare superhydrophobic cotton textiles. Silver particles were produced on cotton fibers by treatment with aqueous KOH and AgNO 3, followed by reduction treatment with ascorbic acid in the presence of a polymeric steric stabilizer to generate a dual-size surface roughness. Further modification of the particle-containing cotton textiles with octyltriethoxysilane led to hydrophobic surfaces. Surfaces prepared showed a sticky property, which exhibits a static water contact angle of 151° for a 10 μL droplet that water drop did not slid off even when the sample was held upside down. The modified cotton has potent antibacterial activity toward both Gram-positive and Gram-negative bacteria. The Ag particles were uniformly and stably distributed on the substrate surface and killed bacteria. These modified cotton textiles are potentially useful; as superhydrophobic antibacterial fabrics in a wide variety of biomedical and general use applications.