Abstract Herein, silane-functionalized carbon nanodots (Si-CDs) with different sizes and surface grafting density were successfully fabricated by a facile and cost-effective one-pot solvothermal treatment and incorporated for the first time as novel compatibilizers into the thermoplastic polyurethane/methyl vinyl silicone rubber (TPU/MVQ) blends. As obtained fluorescent Si-CDs with a size of 2 nm and functionalized with maximum amido and silane chains, called Si-CDs-High, displayed better compatibilizing efficiency than other Si-CDs with large size and low grafting density. The average diameter of MVQ domain in the blend reduced sharply from 2.51 ± 1.03 μm to 0.91 ± 0.28 μm at a small content of 1 wt% of Si-CDs-High. As effective compatibilizers, Si-CDs-High were located at the interface and formed a stable interface layer between TPU and MVQ phases and the thickness of interface was quantitatively identified by using Atomic Force Microscope. The superior compatibilizing efficiency of Si-CDs-High can be attributed that such Si-CDs with sufficient chains and groups can not only prevent coalescence of polymer domains by rigid nanoparticle core but also enhance interfacial adhesion due to the molecular entanglements and hydrogen bonding. Furthermore, the polymer blends with Si-CDs-High exhibited enhanced mechanical property, thermal stability and tunable fluorescent properties. This strategy compatibilized by fluorescent Si-CDs paves a new possibility for advanced blend nanocomposites.

中文翻译：

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硅烷功能化碳纳米点的一锅水热合成作为不混溶 TPU/MVQ 共混物的增容剂

摘要 在此，通过简便且经济高效的一锅溶剂热处理成功地制备了具有不同尺寸和表面接枝密度的硅烷官能化碳纳米点（Si-CDs），并首次将其作为新型增容剂掺入热塑性聚氨酯/甲基丙烯酸甲酯中。乙烯基硅橡胶 (TPU/MVQ) 共混物。获得的尺寸为 2 nm 并用最大酰氨基和硅烷链官能化的荧光 Si-CDs，称为 Si-CDs-High，比其他大尺寸和低接枝密度的 Si-CDs 显示出更好的增容效率。在 1 wt% Si-CDs-High 的少量含量下，共混物中 MVQ 域的平均直径从 2.51 ± 1.03 μm 急剧减小到 0.91 ± 0.28 μm。作为有效的增容剂，Si-CDs-High位于界面处，在TPU和MVQ相之间形成稳定的界面层，并通过原子力显微镜定量识别界面厚度。Si-CDs-High 优异的增容效率可归因于这种具有足够链和基团的 Si-CDs 不仅可以防止刚性纳米颗粒核对聚合物域的聚结，而且由于分子缠结和氢键，还可以增强界面粘附。此外，聚合物与 Si-CDs-High 的共混物表现出增强的机械性能、热稳定性和可调荧光性能。这种与荧光 Si-CD 相容的策略为高级混合纳米复合材料提供了新的可能性。Si-CDs-High 优异的增容效率可归因于这种具有足够链和基团的 Si-CDs 不仅可以防止刚性纳米颗粒核对聚合物域的聚结，而且由于分子缠结和氢键，还可以增强界面粘附。此外，聚合物与 Si-CDs-High 的共混物表现出增强的机械性能、热稳定性和可调荧光性能。这种与荧光 Si-CD 相容的策略为高级混合纳米复合材料提供了新的可能性。Si-CDs-High 优异的增容效率可以归因于这种具有足够链和基团的 Si-CDs 不仅可以防止聚合物域通过刚性纳米颗粒核聚结，而且由于分子缠结和氢键，还可以增强界面粘附。此外，聚合物与 Si-CDs-High 的共混物表现出增强的机械性能、热稳定性和可调荧光性能。这种与荧光 Si-CD 相容的策略为高级混合纳米复合材料提供了新的可能性。聚合物与 Si-CDs-High 的共混物表现出增强的机械性能、热稳定性和可调荧光性能。这种与荧光 Si-CD 相容的策略为高级混合纳米复合材料提供了新的可能性。聚合物与 Si-CDs-High 的共混物表现出增强的机械性能、热稳定性和可调荧光性能。这种与荧光 Si-CD 相容的策略为高级混合纳米复合材料提供了新的可能性。