Enhancing the optical, electrical, and mechanical properties of polymeric materials, by blending with another material and doping with nano‐fillers, is crucial for improving their performance in optoelectronic, biological, and medical applications. In this work, the influence of adding multi‐walled carbon nanotubes (MWCNTs) on the physical properties of carboxymethyl cellulose/polyacrylamide blends is reported. Scanning electron microscopy was used for investigating films' surface morphology and revealed good distribution of MWCNTs on the blend surface. UV–vis‐IR spectroscopy showed that absorption and refractive indices, and other dispersion parameters could be controlled by adjusting the films' compositions. Loading 2 wt% MWCNTs narrowed the optical bandgap of the blend from 5.1 to 4.1 eV. Doping with MWCNTs raised the DC conductivity by about two orders of magnitude by forming three‐dimensional pathways within the blend matrix. The storage modulus increased with MWCNTs loading by 39.3% for the 2 wt% ratio while decreasing with increasing temperature. POLYM. ENG. SCI., 60:996–1005, 2020. © 2020 Society of Plastics Engineers

中文翻译：

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MWCNT对改善CMC / PAAM共混物的光学，直流电导率和机械性能的影响

通过与另一种材料混合并掺杂纳米填料来增强聚合材料的光学，电学和机械性能，对于提高其在光电，生物和医学应用中的性能至关重要。在这项工作中，报道了添加多壁碳纳米管（MWCNT）对羧甲基纤维素/聚丙烯酰胺共混物物理性能的影响。扫描电子显微镜用于研究膜的表面形态，并揭示了MWCNT在共混物表面上的良好分布。紫外可见光谱表明，可以通过调节膜的成分来控制吸收率和折光率以及其他色散参数。负载2wt％的MWCNT将共混物的光学带隙从5.1eV缩窄到4.1eV。掺杂多壁碳纳米管通过在混合基体内形成三维路径，使直流电导率提高了大约两个数量级。对于2 wt％的比例，储能模量随MWCNTs负载增加39.3％，而随温度升高而降低。POLYM。ENG。SCI。，60：996–1005，2020。©2020塑料工程师协会