在最近发表的《开放式杂志》上发表的文章中GydF4y2Ba亚博网站下载,研究人员报告了通过涂层的氧化石墨烯(GO)和电化学沉积的Ag°颗粒的涂层开发了电导性棉布。yabo214GydF4y2Ba
Study:棉织物的抗菌电导复合涂料。GydF4y2Ba图片来源:Daniel Ramirez-Gonzalez/Shutterstock.comGydF4y2Ba
The researchers investigated the superhydrophobicity and the antibacterial activity of the cotton fabric modified with the coating of composite Ag°/rGO againstStaphylococcus aureusAnd大肠杆菌GydF4y2Ba。GydF4y2Ba
背景GydF4y2Ba
由于应用多样化的应用,电导性织物正在越来越受欢迎。纺织品可以用石墨烯材料(GM)(例如还原的石墨烯(RGO))或碳纳米颗粒(亚博网站下载例如碳纳米管)涂覆,以实现电导率。yabo214石墨烯对纺织品修饰的实用性受到限制,因为难以创建可应用于亲水性天然纤维的稳定水性分散体。GydF4y2Ba
但是,GO中的官能团使其更容易分散在水中,但会限制其电导率,因此GO应化学或热还原为RGO。去化学还原经常需要高温(80–100°C),并且很长时间,而其热还原需要无氧的条件和更高的温度。GydF4y2Ba
棉织物的SEM显微照片:((GydF4y2BaAGydF4y2Ba,,,,GydF4y2BabGydF4y2Ba) 整洁的, (GydF4y2BaCGydF4y2Ba)涂覆(GydF4y2BadGydF4y2Ba)rGO-coated. Image Credit: Makowski, T. et al., Materials
There is currently an increasing demand for smart and intelligent clothes, such as cotton cloth, which are electroconductive and can store or communicate energy. Antimicrobial action can eradicate microbial colonization and lower the risk of infection in such applications. The antibacterial activity of GM particles relies on their adsorption ability, dispersibility, sharp edges, and the number of corners.
尽管如此,很少有研究证明,通过减少GO的化学化和Ag的生长,棉花织物的修饰。同样,尚未研究仅用RGO处理的织物的抗菌特性。GydF4y2Ba
关于研究GydF4y2Ba
在本研究中,基于填充策略将GO涂在棉布上,然后通过使用L-抗坏血酸使布电导性通过L-抗坏血酸将其热还原为RGO。使用循环伏安法,将Ag°颗粒电化学放在RGO涂层的电导导布上yabo214,从而可以监测氧化还原过程。磁盘扩散方法用于评估改性棉织物对革兰氏阴性的抗菌活性GydF4y2Ba大肠杆菌GydF4y2Ba细菌和革兰氏阳性GydF4y2BaS.金黄色葡萄酒GydF4y2Ba。GydF4y2Ba
The fabric's surface electrical resistivity (R) was tested using the four-wire method, and water contact angles (WCA) were evaluated to test water wettability. The antibacterial characteristics of the fabric samples were examined using the antibacterial activity assessment of textile materials i.e., agar diffusion test against大肠杆菌GydF4y2BaATCC 8739和GydF4y2BaS.金黄色葡萄酒GydF4y2BaATCC 6538. The modified cloth fibers were also examined under a scanning electron microscope (SEM) to assess bacterial colonization.
Disk specimens of cotton fabric on bacteria inoculated agar after 48 h incubation: E. coli (AGydF4y2Ba)涂覆(GydF4y2BabGydF4y2Ba)涂有rgo涂层((GydF4y2BaCGydF4y2Ba)ag°/rgo涂层;S.金黄色(((Aureus))((GydF4y2BadGydF4y2Ba)涂覆(GydF4y2BaeGydF4y2Ba)涂有rgo涂层((GydF4y2BaFGydF4y2Ba)ag°/rgo涂层。图片来源:Makowski,T。等,材料亚博网站下载GydF4y2Ba
观察GydF4y2Ba
结果表明,当放置在其上的GO量减少时,织物变成了导电。当热阶段温度达到220°C时,R急剧下降,但在220°C时在0.1MΩ/sq的1分钟内升高。RGO在纤维表面上的3D网络的存在通过5.4MΩ/sq的R证明。GydF4y2Ba
如SEM显微照片所推断,在RGO包被的表面上,Ag+离子以及Ag颗粒的成核和发育。yabo214根据TGA分析,确定AG含量为0.4 wt。%。电化学改变后,织物的R在5.35MΩ/sq处保持恒定。WCA为161°,发现Ag/Rgo修饰的布是超疏水性的。GydF4y2Ba
据观察,由于GO的降低,该织物获得了电导率,从而允许基于循环伏安法的Ag颗粒的电化学沉积。yabo214Ag°/RGO复合材料组合的涂层赋予了对所研究细菌菌株的织物抗菌活性和超疏水性,GydF4y2BaS金黄色GydF4y2BaAnd大肠杆菌GydF4y2Ba。可以看出,涂层织物在减少之前或之后没有抗菌活性。GydF4y2Ba
只有AG°/RGO复合涂层才能具有布抗菌特性。在AG°/RGO修饰的纤维上未鉴定细菌膜,并且在材料标本周围发现了细菌生长抑制区。GydF4y2Ba
SEM micrographs of bottom surfaces of cotton fabric specimens removed from agar after 48 h incubation: E. coli (AGydF4y2Ba)整洁的织物((GydF4y2BabGydF4y2Ba)涂覆(GydF4y2BaCGydF4y2Ba)涂有rgo涂层((GydF4y2BadGydF4y2Ba)ag°/rgo涂层,s. aureus(GydF4y2BaeGydF4y2Ba)整洁的织物((GydF4y2BaFGydF4y2Ba)涂覆(GydF4y2BaGGydF4y2Ba)涂有rgo涂层((GydF4y2BaHGydF4y2Ba)ag°/rgo涂层。图片来源:Makowski,T。等,材料亚博网站下载GydF4y2Ba
结论GydF4y2Ba
总之,这项研究证明了用AG°/RGO复合涂层改性的棉布的抗菌活性。涂层织物在减少GO之前或之后没有具有抗菌作用,并且仅由Ag/Rgo涂层赋予抗菌能力,这是由细菌抑制性生长区周围以及非 - 非 - - 非 - 涂层所证明的。纤维上的细菌膜的存在。另外,Ag°/Rgo修饰的织物变成了超疏水性,WCA为161°。GydF4y2Ba
总体而言,作者证明,在复合AG°/RGO织物涂料上获得的结果有望用于开发新型抗菌材料。亚博网站下载GydF4y2Ba
Source
Makowski,T.,Svyntkivska,M.,Piorkowska,E.,GydF4y2Ba等。GydF4y2Ba棉织物的抗菌电导复合涂料。亚博网站下载材料15(3),1072(2022)。GydF4y2Bahttps://www.mdpi.com/1996-1944/15/3/1072GydF4y2Ba
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