A series of BT–cCNT/PDMS and BT–aCNT/PDMS composites were developed by incorporating barium titanate (BT) nanoparticles together with carboxylic functionalized multiwalled carbon nanotubes (cCNT) and amino functionalization multiwalled carbon nanotubes (aCNT) in polydimethylsiloxane (PDMS). Benefitting from the abundant active groups, CNTs and BTs can be in situ “bridged” by hydrogen bond in all of the BT–cCNT/PDMS and BT–aCNT/PDMS composites. Here, we studied the effect of hydrogen bonds (type and amount) between BTs and CNTs at the interface and dielectric properties of the composites. The results indicated that the BT–cCNT/PDMS composite exhibited higher dielectric constant and comparable dielectric loss than the BT–aCNT/PDMS composite, especially when weight_CNT < 1 wt%. Also, the dielectric properties of BT–cCNT/PDMS composite show stronger temperature dependence than BT–aCNT/PDMS composite. Finally, the tailorable performance of the polymer-based dielectric composites can be obtained by regulating the interface with the help of hydrogen bonds.

中文翻译：

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通过碳纳米管和钛酸钡之间的定制氢键作为改性填料增强聚二甲基硅氧烷基三元复合材料薄膜的介电性能

通过在聚二甲基硅氧烷 (PDMS) 中加入钛酸钡 (BT) 纳米颗粒、羧基官能化多壁碳纳米管 (cCNT) 和氨基官能化多壁碳纳米管 (aCNT)，开发了一系列 BT-cCNT/PDMS 和 BT-aCNT/PDMS 复合材料。得益于丰富的活性基团，CNT 和 BT 可以在所有 BT-cCNT/PDMS 和 BT-aCNT/PDMS 复合材料中通过氢键原位“桥接”。在这里，我们研究了 BTs 和 CNTs 之间在界面处氢键（类型和数量）的影响以及复合材料的介电性能。结果表明，与 BT-aCNT/PDMS 复合材料相比，BT-cCNT/PDMS 复合材料表现出更高的介电常数和相当的介电损耗，尤其是当重量_CNT < 1 重量%。此外，BT-cCNT/PDMS 复合材料的介电性能表现出比 BT-aCNT/PDMS 复合材料更强的温度依赖性。最后，可以通过氢键调节界面来获得聚合物基介电复合材料的可定制性能。