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将羟基功能化纳米银应用于载银甲壳素纤维的制备,利用分光光度法研究了甲壳素纤维对羟基功能化纳米银的吸附性能和吸附机理;测试了不同银含量载银甲壳素纤维的抗菌性能;采用扫描电镜(SEM)和光电子能谱(XPS)对载银甲壳素纤维的微观形貌和元素成分进行了分析。研究结果表明,甲壳素纤维对羟基功能化纳米银具有较高的吸附能力,最高吸附量可达3 390 mg/kg;纳米银颗粒在甲壳素纤维表面分布均匀,且未被氧化;另外,抗菌测试结果表明载银甲壳素纤维具有优异的抗菌性能,当银含量达到1 000 mg/kg时,其对E.coli和S.aureus的抑菌率均可达99%以上。 相似文献
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以海藻酸钙纤维和纳米银溶液为原料,采用浸渍富集法制备了载银海藻酸钙纤维。采用红外光谱(FTIR)和扫描电镜(SEM)表征了载银海藻酸钙纤维的结构,测试了载银前后海藻酸钙纤维的吸湿性能和力学性能,检测了不同银含量载银海藻酸钙纤维的抗菌性能。结果表明,载银海藻酸钙纤维表面的银颗粒粒径在20~50 nm左右,载银对海藻酸钙纤维的吸湿性能和力学性能影响较小,当载银海藻酸纤维银含量达到18 000mg/kg时,对白色念珠菌(ATCC 10231)、大肠杆菌(ATCC 25922)的抑菌率均达到99%以上。 相似文献
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《印染助剂》2017,(9)
探讨了棉纤维载银处理后的服用与抗菌性能。研究表明,棉纤维的载银量、纤维表面摩擦系数随着纳米银溶液质量浓度的增加而增加,而纤维的吸湿回潮率、力学性能则随着纳米银溶液质量浓度的增加而降低,当纳米银溶液质量浓度超过100 mg/L时,变化速率减小。当纳米银溶液质量浓度为30 mg/L时,棉纤维的载银量已达620.7 mg/kg,能够满足白念珠菌、革兰氏阳性菌金黄色葡萄球菌、革兰氏阴性菌大肠埃希菌载银量600、200与100 mg/kg的抗菌要求。认为:棉纤维纳米银溶液质量浓度为30 mg/L时进行载银处理,不仅保留了棉纤维较好的服用性能,也使得棉纤维具有较好的医用抗菌性能。 相似文献
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以水性聚氨酯为分散体系,硼氢化钠为还原剂,硝酸银为前驱体,利用化学原位还原法制备纳米银溶液,所制备的纳米银粒子粒径在10 nm左右。将制得的纳米银溶液与聚氨酯溶液混合后,通过静电纺丝的方法制备了三种不同载银量的载银纳米纤维膜。结果显示,将300μL的4 000 mg/kg纳米银溶液加入到由150 mL丙酮和N,N-二甲基甲酰胺(DMF)(体积比1∶1)混合溶剂溶解的质量分数为25%的热塑性聚氨酯弹性体(TPU)溶液中,通过静电纺制备的纳米纤维膜对大肠埃希菌和金黄葡萄球菌的抑菌率达99.99%,表现出优异的抗菌性能。 相似文献
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从纳米银粒子的特点、研究现状及制备方法入手,最终开发出了利用物理气相沉积法制备纳米银技术,从而解决了普通纤维与金属之间附着力的技术难题。指出纳米银纤维具有生态抗菌,广谱高效,高度安全,效果持久,用量少、抗菌效果好,加工简单,使用方便等特点。最后阐述了抗菌纤维在针织、家纺、产业用、户外运动及部队装备等领域的应用,为纳米银抗菌纤维的应用推广提供参考。 相似文献
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研究中空载银聚酯纤维的结构、吸水吸湿性能、力学性能,以及对酸、碱的化学稳定性能和银离子释放性能。结果表明:中空载银聚酯纤维中的银粒子颗粒小,具有较强的活性和一定的抗菌作用。从红外衍射图中发现,附着于中空聚酯纤维内表面的银粒子对聚酯纤维的内部结构没有造成明显的影响。中空载银聚酯纤维回潮率低,但其中空结构使其吸水性能大大提高。中空载银聚酯纤维的化学性能较稳定,在低温条件下,经酸碱处理后,其强力损失很小,高温处理后,其强力有部分损失;断裂伸长率随时间的延长和温度的上升呈现下降趋势。随着时间和纤维根数的增加,水中银离子的溶度呈现上升趋势,在一定时间后银离子溶度趋于饱和,浓度值趋于平衡。 相似文献
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Setareh Amiri Laurent Duroux Jeppe Lund Nielsen Asbjørn Haaning Nielsen Donghong Yu 《纺织学会志》2013,104(3):327-336
In this study, a temperature-sensitive fabric with antibacterial properties was prepared by the formation of silver nanoparticles (AgNPs) on nonwoven poly (propylene) (PP) grafted with poly (N-iso-propylacrylamide) (PNIPAAm-PP). First, PNIPAAm was grafted onto corona-treated nonwoven PP. Afterwards, silver nanoparticles were synthesized on the temperature-sensitive hydrogel layer grafted to the surface of nonwoven PP by the reduction of silver ions (Ag+). Fourier transform infra-red spectroscopy confirmed the presence of PNIPAAm on the nonwoven PP. scanning electron microscopy-energy dispersive X-ray spectroscopy was used to investigate surface morphology and the presence of silver particles in the samples. Inductively coupled-plasma atomic emission spectroscopy revealed that the Ag content in Ag-functionalized PNIPAAm-PP was significantly higher than Ag-functionalized corona-treated PP with the same concentration of silver solution. Moreover, the results of the swelling rate experiment confirmed that PNIPAAm-PP maintained temperature-sensitive properties after functionalizing with Ag. The results showed that the formation of AgNPs with enhancement in antibacterial property was possible onto PNIPAAm-PP. 相似文献
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Chaolin Ye Guozhen Ma Zhihua Zhu Wuchang Fu Junpeng Duan 《Journal of Natural Fibers》2017,14(1):86-96
Polylactide (PLA) was grafted onto sisal fiber (SF) on the basis of the principle of lactide coordinative ring-opening polymerization. The orthogonal test was done to investigate which process parameter affected the grafting ratio mostly. Then the thermal stability of lactide-grafted sisal fiber (SF-g-LA) was studied. Results demonstrated that the lactide was grafted on sisal fiber surface and initiator amount was found to be the most important determinant of the grafting ratio. After grafting copolymerization reaction, the thermal stability of sisal fiber decreased. The increase of grafting ratio does not decreased the thermal stability of SF-g-LA. 相似文献
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Silver ions can effectively kill bacteria due to their adsorption onto the negatively charged bacterial cell wall, thus deactivating cellular enzymes, disrupting membrane permeability, and ultimately leading to cell lysis and death. In this study, silver particles incorporated into hollow polyethylene terephthalate (PET) fibers are utilized as an antibacterial composition against the bacterium, Staphylococcus aureus. Also, a silver ion–bacterium model similar to the predator–prey model is established to analyze the inhibitory effect of silver ions on S. aureus. In contact with an aqueous solution, silver ions are released from hollow PET fibers into the solution. When a silver ion in an active medium is absorbed by a bacterium, the bacterium dies and the concentration of silver ions lowers in the medium. To keep the concentration of silver ions in the medium constant, another silver ion is released from the hollow fiber, making the silver ion–bacterium model much simpler to be solved analytically. This study shows that there is an optimal concentration of silver ions at which minimal cytotoxicity and maximal antibacterial efficacy can be achieved. To support this, experimental verification is also carried out in this study. 相似文献
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Composite films with silver nanoparticles (AgNPs), obtained by reduction of AgNO3 using an environmentally friendly method (combined reduction of AgNO3 by trisodium citrate solution and heating), and agar as a polymer matrix and a capping agent were prepared by solvent casting method. The surface color of the resulting agar/AgNPs films exhibited the characteristic plasmonic effect of the silver nanoparticles, and the characteristic properties of the composite films were greatly influenced by changing the concentration of AgNPs added. Significant increase in water vapor barrier properties and surface hydrophobicity were observed with increase in the concentration of AgNPs without reduction in the mechanical strength. In addition, the agar/AgNPs films loaded with more than 1 wt% of silver nanoparticles exhibited strong antimicrobial activity against both Gram-positive (Listeria monocytogenes) and Gram-negative (Escherichia coli O157:H7) bacterial pathogens. 相似文献
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针对棉织物与纳米银之间缺乏亲和性,主要依靠物理吸附结合,水洗牢度差等问题,总结了基于共价结合的纳米银抗菌棉织物的最新研究进展,探讨了席夫碱反应和酯化反应这2种共价结合机制。以纳米银与棉织物之间的共价交联剂(超支化聚合物、树状大分子、丝素、丝胶、半胱氨酸、蛋氨酸、巯基乙酸、壳聚糖衍生物、聚苯乙烯-b-聚丙烯酸、丁烷四羧酸)种类进行分类介绍,结合抑菌率和银含量的数据讨论了基于共价结合的纳米银抗菌棉织物的制备工艺、抗菌性能和抗菌耐洗性能。最后对基于共价结合的纳米银抗菌棉织物领域存在的不足和未来需要深入关注的地方进行了探讨。研究指出,共价交联法大幅提高了纳米银的抗菌耐洗性能,为开发环境友好和长效抗菌的纳米银纺织品提供了新思路和新途径。 相似文献
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为保护医护人员生命健康安全,研制了一种兼具抗菌和阻隔功能的可重复使用生物防护材料。首先以纳米银(AgNPs)为抗菌剂,热塑性聚氨酯(TPU)为基体,通过静电纺丝技术制备载银TPU纳米纤维膜;然后以聚二甲基硅氧烷(PDMS)为疏水整理剂,涤纶织物为基材,通过等离子体刻蚀—浸轧PDMS—焙烘工艺制备防沾污织物;最后将制备的载银TPU纳米纤维膜与防沾污织物进行点胶复合制备生物防护材料。测试了生物防护材料的抗湿性能、透湿性能、防水性能及过滤性能等。结果表明:经过50次标准洗涤后,防沾污织物的水接触角达到143.1°;纳米银负载量为300 mg/kg的生物防护材料对大肠杆菌和金黄色葡萄球菌的抑菌率均达到99.99%,且沾湿等级达到5级,水蒸气透过量为2 654.8 g/(m2·24 h),断裂强力为450 N左右,静水压为53.6 kPa,过滤效率达到99%以上。 相似文献