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首页> 外文期刊>ACS applied materials & interfaces >Highly Effective Electromagnetic Interference Shielding Materials based on Silver Nanowire/Cellulose Papers
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Highly Effective Electromagnetic Interference Shielding Materials based on Silver Nanowire/Cellulose Papers

机译：基于银纳米线/纤维素纸的高效电磁干扰屏蔽材料

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摘要

We fabricated silver nanowire (AgNW)-coated cellulose papers with a hierarchical structure by an efficient and facile dip-coating process, and investigated their microstructures, electrical conductivity and electromagnetic interference (EMI) shielding effectiveness. SEM images confirm that AgNWs are coated dominantly on the paper surfaces, although they exist partially in the inner parts of the cellulose papers, which demonstrates that the AgNW density gradually decreases in thickness direction of the AgNW/cellulose papers. This result is supported by the anisotropic apparent electrical conductivity of the AgNW/cellulose papers depending on in-plane or thickness direction. Even for a AgNW/cellulose paper obtained by a single dip-coating cycle, the apparent electrical conductivity in the in-plane direction of 0.34 S/cm is achieved, which is far higher than the neat cellulose paper with similar to 10(-11) S/cm. In addition, the apparent electrical conductivity of the papers in the in-plane direction increases significantly from 0.34 to 67.51 S/cm with increasing the number of dip-coating cycle. Moreover, although the AgNW/cellulose paper with 67.51 S/cm possesses 0.53 vol % AgNW only, it exhibits high EMI shielding performance of similar to 48.6 dB at 1 GHz. This indicates that the cellulose paper structure is highly effective to form a conductive AgNW network. Overall, it can be concluded that the AgNW/cellulose papers with high flexibility and low density can be used as electrically conductive components and EMI shielding elements in advanced application areas.
机译：我们通过高效且简便的浸涂工艺制备了具有分级结构的银纳米线（AgNW）涂层纤维素纸，并研究了它们的微观结构，电导率和电磁干扰（EMI）屏蔽效果。 SEM图像证实，尽管AgNWs部分地存在于纤维素纸的内部，但AgNWs主要涂布在纸表面上，这表明AgNW密度在AgNW /纤维素纸的厚度方向上逐渐降低。根据面内或厚度方向，AgNW /纤维素纸的各向异性表观电导率可支持该结果。即使是通过单次浸涂循环获得的AgNW /纤维素纸，也能实现0.34 S / cm的面内方向表观电导率，远高于纯纤维素纸的10（-11） ）S / cm。另外，随着浸涂循环次数的增加，纸在面内方向上的表观电导率从0.34显着增加到67.51S / cm。此外，尽管具有67.51 S / cm的AgNW /纤维素纸仅具有0.53％（体积）的AgNW，但它在1 GHz时具有类似于48.6 dB的高EMI屏蔽性能。这表明纤维素纸结构对于形成导电AgNW网络非常有效。总体而言，可以得出结论，具有高柔韧性和低密度的AgNW /纤维素纸可以在高级应用领域中用作导电组件和EMI屏蔽元件。

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