One-step synthesis of polymethylhydrosiloxane-silver nanocomposite multifunctional superhydrophobic cotton fabrics

Fabricating multifunctional superhydrophobic cotton fabric via a simple strategy is highly desirable for various applications but it is rare. Herein, we proposed a one step in-situ redox reaction strategy based on polymethylhydrosiloxane (PMHS) and [Ag(NH 3 ) 2 ] + ions to endow cotton fabrics with both superhydrophobic and antibacterial properties. The obtained cotton fabrics show high repellency against common liquids like green tea, cola, milk, orange juice, coffee, NaCl, HCl, and NaOH solution, and possess significant antibacterial activity against both E. coli and S. aureus due to generated Ag nanoparticles. Even subjected to laundering, rubbing, acidic (pH 1)/alkaline (pH 13) solution attack, freezing at liquid nitrogen, or heating treatment (120 °C), the superhydrophobic and antibacterial properties of modified cotton fabrics can remain stable without being damaged, which is highly desirable for long-lasting anti-fouling, oil/water separation, and antibacterial applications. Considering the universality, simplicity, and scalability of the surface functionalization method, this proposal to develop novel multifunctional cotton fabrics with robust water repellent and antibacterial properties has promising and versatile applications in wide areas. Graphical abstract