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Fabrication and characterization of waterborne polyurethane/silver nanocomposite foams

机译：水性聚氨酯/银纳米复合泡沫的制造与表征

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摘要

Nowadays the waterborne polyurethane (WPU) is a newly developed polymer foam material as a replacement for conventional organic solvent-based polyurethane (PU). Nevertheless, the WPU foams exhibit some drawbacks such as inferior mechanical strength, low thermal and dimensional stability, which inhibits its large-scale application at present. So a series of novel WPU/silver nanocomposite foams was successfully prepared by mechanical foaming method. The effect of silver nanoparticles (nano Ag) content on the morphology, thermal behavior, air permeability, water vapor transmission rate (WVT), mechanical, and antibacterial properties of WPU/Ag nanocomposite foams were systematically investigated. The results revealed that the nano Ag were uniformly dispersed in WPU matrix and facilitated cell growth, leading to enhanced mean pore size, thermal stability, air permeability, and WVT value of nanocomposite foams. About 122% improvement in the air permeability and 28% improvement in the WVT value were obtained when the nano Ag content extended from 0 to 4 wt%. It was found that the nano Ag content had great influence on tensile strength and elongation at break. When nano Ag content was 2 wt%, the nanocomposite foam exhibited the maximum tensile strength value of 1.26 MPa. Moreover, because of the addition of nano Ag, the nanocomposite foam showed bacteriostatic rate of 98.23% and 97.38% against Escherichia coli and Staphylococcus aureus, respectively. POLYM. COMPOS., 40:1492-1498, 2019. (c) 2018 Society of Plastics Engineers
机译：如今，水性聚氨酯（WPU）是一种新开发的聚合物泡沫材料，作为常规有机溶剂基聚氨酯（PU）的替代品。然而，WPU泡沫表现出一些缺点，例如较差的机械强度，低热和尺寸稳定性，其抑制其目前的大规模应用。因此，通过机械发泡方法成功制备了一系列新型WPU /银纳米复合泡沫。系统研究了银纳米颗粒（Nano Ag）含量对WPU / Ag纳米复合泡沫的形态，热行为，透气性，水蒸气透射率（WVT），机械和抗菌性性能的影响。结果表明，纳米AG均匀地分散在WPU基质中，促进细胞生长，导致纳米复合泡沫的增强的平均孔径，热稳定性，透气性和WVT值。当纳米Ag含量从0〜4wt％延伸时，获得约122％的透气性和WVT值的28％改善。发现纳米Ag含量对拉伸强度和断裂伸长率有很大影响。当纳米Ag含量为2wt％时，纳米复合泡沫显示出最大拉伸强度值为1.26MPa。另外，由于添加纳米Ag，纳米复合泡沫分别显示出抑菌率为98.23％和97.38％，分别对大肠杆菌和金黄色葡萄球菌。聚合物。 Compos。，40：1492-1498,2019。（c）2018年塑料工程师协会

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  • 来源
    《Polymer Composites》 |2019年第4期|共7页
  • 作者

    Zhao Baobao; Qian Yao; Qian Xiaoming; Fan Jintu; Feng Yan;

  • 作者单位

    Tianjin Polytech Univ Sch Text Tianjin 300387 Peoples R China;

    Tianjin Polytech Univ Sch Text Tianjin 300387 Peoples R China;

    Tianjin Polytech Univ Sch Text Tianjin 300387 Peoples R China;

    Cornell Univ Dept Fiber Sci &

    Apparel Design Ithaca NY 14853 USA;

    Tianjin Polytech Univ Sch Text Tianjin 300387 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 增强塑料、填充塑料;
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