葡萄糖溶液中氧化棉织物原位合成纳米银粒子
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安徽农业大学 轻纺工程与艺术学院

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O636

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国家科技部重点专项项目(国科发资〔2020〕151号); 安徽省科技重大专项项目(202103a06020005); 绍兴“名士之乡”英才计划项目(绍市委人领〔2021〕1号); 苏州市吴江区科技领军人才项目(吴科〔2018〕131号); 国家级大学生创新创业训练计划(202010364018); 安徽省大学生创新创业训练计划(S202010364146)


In Situ Synthesis of Silver Nanoparticles in Oxidized Cotton Fabric with Glucose Solution
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    摘要:

    纤维作为银离子的还原剂和稳定剂,是合成纳米银材料的绿色途径。本文利用高碘酸钠选择性氧化得到醛基棉织物,通过氧化棉织物原位稳定并协同葡萄糖还原AgNO3制备出纳米银负载棉织物。运用扫描电镜、X射线能谱、X射线衍射和红外光谱等技术表征载银棉织物的结构及组成,分析了可能的纳米银生成机理。研究了氧化棉织物上纳米银负载率的影响因素,并测试了纳米银织物的抗菌活性。结果表明,氧化棉织物醛基含量为0.089mmol/g,葡萄糖与硝酸银摩尔浓度比为2:1、硝酸银浓度为0.05mol/L和反应液pH值为8左右时,织物上纳米银负载率达到6.33%;葡萄糖溶液中银离子被原位还原成球形纳米银粒子后致密而均匀地稳定在氧化棉织物表面,晶粒大小约为28nm,纳米银粒子与氧化棉纤维形成配位作用,所制备的纳米银负载棉织物对S.aureus和E.coil的抑菌率分别为99.97%和99.99%,水洗50次的抗菌率仍在97.53%以上,在抗菌纺织品和纤维防护材料方面极具潜力。

    Abstract:

    As a reducing agent and stabilizer of silver ions, fiber is a green way to synthesize nano-silver materials. The dialdehyde cotton fabric was obtained by the selective oxidation of sodium periodate, and then cotton fabric loaded with silver nanoparticles (AgNPs) was synthesized through the in situ stabilization on oxidized cotton and reduction reaction of the oxidized cotton fabric cooperated with glucose in this paper. The structure and composition of resulted cotton fabric modified by AgNPs were characterized by scanning electronic microscope, energy dispersive spectrum of X-ray, X-ray diffraction and infrared spectrum etc, and the possible generation mechanism of AgNPs in the oxidized cotton was investigated. The influence factors on the load yield of AgNPs in oxidized cotton fabric were analyzed, and the antibacterial activity of nanosilver fabrics against S. aureus and E. coli was also detected. The results indicated that the load yield of 6.33% for AgNPs in the fabric was achieved while the aldehyde content of oxidized fabric was 0.089mmol/g, the molar concentration ratio of glucose vs AgNO3 was 2:1, the AgNO3 concentration was 0.05mol/L and the pH value of reaction solution was about 8. The spherical AgNPs reduced from Ag+ uniformly stabilized on the surface of the oxidized cotton fabric as both reducer and carrier, the crystalline size of AgNPs was about 28 nm, furthermore the coordinate actions were formed between the oxidized cotton fiber and AgNPs. The prepared nano-silver loaded cotton fabrics had the antibacterial rates of 99.97% and 99.99% against S.aureus and E.coil, respectively, and then the antibacterial rate after 50 washes was still above 97.53%, which indicated a great potential for antibacterial textiles and protection materials of fibers.

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  • 收稿日期:2021-12-15
  • 最后修改日期:2022-04-16
  • 录用日期:2022-04-24
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