Construction of a Rapid Photothermal Antibacterial Silk Fabric via QCS-Guided In Situ Deposition of CuSNPs

Abstract

Natural textiles provide an ideal environment for bacterial growth, causing harm to human health. In order to overcome this issue, a photothermal antibacterial technique has been employed as a facile strategy in recent years. Copper sulfide nanoparticles (CuSNPs) exhibit a satisfactory photothermal effect and can be potentially used to construct antibacterial textiles. Herein, we prepared a photothermal antibacterial silk fabric via a two-step method, where a chitosan quaternary ammonium salt (QCS) was used as a template to temporarily fix negative sulfur ions, which were transferred to silk fibers containing copper ammonia ions. The morphology, structure, and corresponding antibacterial ability for the obtained CuSNP-deposited silk fabric were examined. The obtained results revealed that the prepared materials, formed by interactions with silk fibers and QCS chains, exhibited uniform size and typical structural characteristics, promoting UV resistance and a good light-to-heat conversion effect. Moreover, a rapid antibacterial efficiency of the composite silk fabric was determined under light irradiation (400 mW/cm2), resulting in 99.99% bacteria death of Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) within 5 min of irradiation. Additionally, the antibacterial rate of CuSNP-deposited with QCS as a template (SF/QCS/CuS) remained at a high level even after 10 washes, indicating a rapid bonding rate of the photothermal nanoparticles. This work develops a novel and efficient strategy for the construction of a photothermal antibacterial silk fabric, which expands its wide applications in the field of antibacterial materials.

Stimuli-Activable Metal-Bearing Nanomaterials and Precise On-Demand Antibacterial Strategies

“…, copper mesh, Ti mesh). , For the development of personal antibacterial protective products ( e.g. , antibacterial masks), fabrics are the main matrix for incorporating antibacterial materials. , In this section, we mainly discuss the various engineering designs of the SAMNs applied in four major fields, (1) bacterial infection treatment, (2) anti-biofilm use, (3) water disinfection, and (4) wearable antibacterial preparations in personal protection equipment ( e.g. , masks).…”

Multifunctional Textile Constructed via Polyaniline-Mediated Copper Sulfide Nanoparticle Growth for Rapid Photothermal Antibacterial and Antioxidation Applications

“…21 In our previous work, CuSNPs were successfully deposited on silk fabric (SF) using chitosan quaternary ammonium salt (QCS) as the template, achieving UV resistance and photothermal antibacterial properties. 38 However, the deposited CuSNPs can be slowly oxidized to CuSO 4 under the action of O 2 and H 2 O when stored in a humid environment, 39 resulting in negative impacts to its photothermal performances. Meanwhile, photothermal antibacterial textiles are easily polluted during use because of their hydrophilic fabric surfaces.…”

Dyeable PAN/CuS Nanofiber Membranes with Excellent Mechanical and Photothermal Conversion Properties via Electrospinning

“…20 For example, Cheng et al 21 prepared a CuS@PDA-coated cotton fabric by chemical deposition to afford excellent photothermal conversion and photocatalytic performance. Ren et al 22 treated silk fabrics (SF) with CuSNP to obtain photothermal antibacterial silk, which showed a perfect light-to-heat conversion effect, and the surface temperature of SF/QCS/ CuS rapidly increased to 102 °C under 700 mW cm −2 illumination. In spite of the excellent photothermal properties obtained by the above method, it has a negative impact on the dyeability and mechanical properties of the fiber to a certain extent.…”

“…In this study, copper sulfide (CuS) @quaternized chitosan NPs (CuS@QCS NPs) were first added to the spinning solution as a photothermal conversion material, and then, a PAN/CuS film was prepared by electrospinning. Quaternized chitosan (QCS), as a template and stabilizer, can significantly improve the dispersion of copper sulfide nanosheets via electrostatic attraction. , Specifically speaking, thiosulfate ions (S 2 O 3 2‑ ) in sodium thiosulfate were introduced into QCS by electrostatic attraction, leading to progression in homogeneous nucleation and growth of copper sulfide (Figure ). The results show that the mechanical properties of pure PAN can be effectively improved by adding micro nanosheets.…”

“…Quaternized chitosan (QCS), as a template and stabilizer, can significantly improve the dispersion of copper sulfide nanosheets via electrostatic attraction. 22,25 Specifically speaking, thiosulfate ions (S 2 O 3…”