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Design of interconnected 1D nanomaterials with selective localization in biodegradable binary thermoplastic nanocomposite films for effective electromagnetic interference shielding effectiveness
Polymers for Advanced Technologies ( IF 3.4 ) Pub Date : 2022-12-04 , DOI: 10.1002/pat.5949
Krishnendu Nath, Suman Kumar Ghosh, Ankur Katheria, Palash Das, Sreeja Nath Chowdhury, Puja Hazra, Syful Azam, Narayan Ch. Das

Flexible and electrically conductive polymer nanocomposite materials are gaining popularity as EMI shield materials. Herein, we report the successful fabrication of Thermoplastic polyurethane (TPU)/polybutylene adipate-co-terephthalate (PBAT)/dodecyl amine modified multi-walled carbon nanotubes (MWCNT)-based biodegradable polymer nanocomposite films employing solvent mixing and casting technique. The FESEM analysis of the cryofractured TPU/PBAT blend (containing 50 wt% of both the polymers) is found to be perfectly co-continuous. Field emission scanning electron microscopy (FESEM), High-resolution transmission electron microscopy (HRTEM) analysis followed by a selective dissolution test of polymer nanocomposites revealed that MAm nanofillers are mostly confined to the PBAT phase. The electrical percolation threshold is found to be between 3 and 5 wt% of dodecyl amine modified MWCNT loading as the electrical conductivity and EMI shielding efficiency are found to be shifting from 10−4 to 0.827 S/cm and −29.4 and −36 dB respectively as the nanofiller loading is increased from 3 to 5 wt% keeping the thickness of the polymer nanocomposite films constant at 0.8 mm.

中文翻译:

在可生物降解的二元热塑性纳米复合薄膜中选择性定位的互连一维纳米材料的设计,以实现有效的电磁干扰屏蔽效果

柔性导电聚合物纳米复合材料作为 EMI 屏蔽材料越来越受欢迎。在此,我们报告了采用溶剂混合和浇铸技术成功制造热塑性聚氨酯 (TPU)/聚己二酸-共-对苯二甲酸丁二醇酯 (PBAT)/十二烷基胺改性多壁碳纳米管 (MWCNT) 基生物可降解聚合物纳米复合薄膜。低温断裂的 TPU/PBAT 共混物(含有 50 wt% 的两种聚合物)的 FESEM 分析被发现是完美共连续的。场发射扫描电子显微镜 (FESEM)、高分辨率透射电子显微镜 (HRTEM) 分析以及聚合物纳米复合材料的选择性溶解测试表明,MAm 纳米填料主要局限于 PBAT 相。-4至 0.827 S/cm 和 -29.4 和 -36 dB 分别为纳米填料负载量从 3 增加到 5 wt%,保持聚合物纳米复合膜的厚度恒定在 0.8 mm。
更新日期:2022-12-04
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