Green and cost-effective carboxylic acid Fe complex functionalized cotton fabrics: sunlight-driven catalytic and antibacterial activities, mechanical and thermal properties
“…In addition, the diffusion of water molecules inside the cellulose fibers promotes a uniform sharing of the charge between the cellulose molecules. 56 Moreover, we noticed a slightly more enhanced tensile strength with samples grafted with the two polymers compared with those grafted with only AG; this can be explained by a more compact grafting and a more connected and stable polymer network in the presence of the two grafted polymers. Figure 8.Tensile strength of untreated and grafted cellulosic dressings.…”
Diabetic foot ulcers have a negative impact on the lives of patients and are highly vulnerable to infection, leading to amputation too often. It is essential that the patient with a diabetic foot ulcer receives the best possible care. Herein, we developed a new functionalized cellulosic wound dressing with high-improved healing properties, able to be a serious alternative for diabetic acute wounds. First, a bioactive polysaccharide was extracted from the Carthamus tinctorius plant. Then a new crosslinked polymer-based alginate/ C. tinctorius polymer extract was prepared and checked for combined antimicrobial and tissue regeneration properties. Afterward, the efficiency of the textile functionalization process was optimized through studying the influence of different grafting parameters: curing conditions and the concentration of the impregnating solution. The drop method wettability technique exhibited significant improvement in the hydrophilicity behavior of treated textile samples, which increased with the grafting rate. Attenuated total reflection Fourier-transform infrared spectroscopy and thermogravimetric analysis or differential thermal analysis were investigated to test whether the chemical permanent grafting resisted the severe standard washing conditions. The tensile strength characteristics showed that the grafting does not affect the original mechanical properties of treated textile dressings. A morphological study via scanning electron microscopy images confirmed the permanent textile finishing performance and permitted us to assess its chemical grafting approach onto the treated surfaces. The biological and the bacteriological investigations of functionalized dressings proved that the functional biomaterial could be used as a medical bioactive device with improved biological properties.
“…In addition, the diffusion of water molecules inside the cellulose fibers promotes a uniform sharing of the charge between the cellulose molecules. 56 Moreover, we noticed a slightly more enhanced tensile strength with samples grafted with the two polymers compared with those grafted with only AG; this can be explained by a more compact grafting and a more connected and stable polymer network in the presence of the two grafted polymers. Figure 8.Tensile strength of untreated and grafted cellulosic dressings.…”
Diabetic foot ulcers have a negative impact on the lives of patients and are highly vulnerable to infection, leading to amputation too often. It is essential that the patient with a diabetic foot ulcer receives the best possible care. Herein, we developed a new functionalized cellulosic wound dressing with high-improved healing properties, able to be a serious alternative for diabetic acute wounds. First, a bioactive polysaccharide was extracted from the Carthamus tinctorius plant. Then a new crosslinked polymer-based alginate/ C. tinctorius polymer extract was prepared and checked for combined antimicrobial and tissue regeneration properties. Afterward, the efficiency of the textile functionalization process was optimized through studying the influence of different grafting parameters: curing conditions and the concentration of the impregnating solution. The drop method wettability technique exhibited significant improvement in the hydrophilicity behavior of treated textile samples, which increased with the grafting rate. Attenuated total reflection Fourier-transform infrared spectroscopy and thermogravimetric analysis or differential thermal analysis were investigated to test whether the chemical permanent grafting resisted the severe standard washing conditions. The tensile strength characteristics showed that the grafting does not affect the original mechanical properties of treated textile dressings. A morphological study via scanning electron microscopy images confirmed the permanent textile finishing performance and permitted us to assess its chemical grafting approach onto the treated surfaces. The biological and the bacteriological investigations of functionalized dressings proved that the functional biomaterial could be used as a medical bioactive device with improved biological properties.
“…Among these, metal complexes are regarded as good photocatalysts with potential applications in drug delivery [37], environmental purification [38], and antibacterial processes [39]. Ligand-metal complexes have received increasing attention, owing to their unique structures, wide range of biological activities, diversity of substituents, and ease of synthesis [40]. Particularly, most metal complexes possess excellent antibacterial activity compared with free ligands and metals [41].…”
Antibacterial coordination compounds have attracted tremendous attention ascribed to their excellent designability. However, how the morphological evolution of these complexes influences their antibacterial and physicochemical properties has never been investigated based on proposed mechanisms. Thus, a series of Co–HOAT coordination compounds synthesized from inorganic to organic cobalt sources were prepared. We propose that with the same HOAT ligand, inorganic Co–HOAT nanosheets possess higher sterilization rates compared with organic Co–HOAT nanoparticles. This is explained by the different steric hindrance of cobalt sources. Relatively small steric hindrance could lead to ample active positions for inorganic cobalt ions to coordinate with both N and O atoms in HOAT. Meanwhile, organic Co2+ ions could only unite with N atoms in HOAT. Furthermore, by theoretical calculation, cobalt ions with adequate coordination sites are beneficial for developing nanosheet morphologies. Meanwhile, the Co–HOAT complexes with a lower density of electron clouds present higher sterilization rates due to the anchoring effect of electrostatic attraction. The proposed mechanism is that Co2+ released from compounds could cause multiple toxic effects to bacteria anchored by Co–HOATs. Finally, Co–HOATs’ behaviors have excellent antimicrobial properties without environmental limitations. In conclusion, the Co–HOATs appear to be a potential antibacterial catalyst in the antimicrobial field.
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