论文标题
二元纳米基聚氨酯杂化纳米复合泡沫的协同增强的粘弹性行为
Synergically enhanced viscoelastic behavior of binary nanocarbon based polyurethane hybrid nanocomposite foams
论文作者
论文摘要
碳纳米纤维以改善聚合物的所需性能而闻名。基质中纳米填料的分散质量对于制造高性能纳米复合材料至关重要。通过混合包含聚氨酯基质中的纳米列列（GNPS），采用了改善多壁碳纳米管（MWCNT）和石墨烯纳米片（GNP）的分散态的有效方法，以进一步增强粘弹性特性。基于MWCNT的纳米复合材料，两组石墨烯和混合MWCNT/石墨烯具有不同的重量分数和比率，通过简单，快速和可扩展的方法制造。动态机械分析结果表明，在仅0.25 wt％的加载下，混合MWCNT/GNP-S750在25C时的存储模量最高为86％，而仅MWCNT和石墨烯纳米复合材料分别显示出9％和15％的增强量，分别在同一内容上增强了9％和15％。玻璃过渡温度值通过约9.5 c增强，其中包括0.25 wt％的三维MWCNT/GNP-S750结构，该结构揭示了热力学特性中明显的协同效应。
Carbon-nanofillers are known for improving the desired properties of polymers. The dispersion quality of nanofillers in the matrix is vital for the fabrication of high-performance nanocomposites. An effective approach for improving dispersion states of multi-walled carbon nanotubes (MWCNT) and graphene nanoplatelets (GNPs) was employed via hybrid inclusion of the nanofillers in polyurethane matrix to further enhancing viscoelastic properties. Nanocomposites based on MWCNTs, two groups of graphene and hybrid MWCNT/graphene with varied weight fractions and ratios were fabricated via a simple, quick and scalable approach. Dynamic mechanical analysis results indicated an improvement of up to 86% in storage modulus at 25C for hybrid MWCNT/GNP-S750 at only 0.25 wt% loading, whereas solely MWCNTs and graphene nanocomposites showed 9% and 15% enhancement at the same content, respectively. The glass transition temperature value was enhanced by about 9.5 C with 0.25 wt% inclusion of well-dispersed three-dimensional MWCNT/GNP-S750 structure, which disclosed a noticeable synergistic effect in thermomechanical properties.
