采用纤维素纸交替浸渍石墨烯纳米片(GNS)及碳纳米管(CNTs)分散液的方法,制备了GNS/CNTs/纤维素纸复合材料,并对其微观形貌、导电性及电磁屏蔽性能进行了表征。结果表明:GNS/CNTs/纤维素纸复合材料的导电性及屏蔽性能随着浸渍次数的增加而提高,当浸渍石墨烯及碳纳米管分散液各5次后,样品的电导率可达7.63S/cm,在30MHz～1.5GHz范围内屏蔽效能均高于22dB,最高可达32dB。更重要的是,所制备的复合材料拥有轻质、超薄、柔软等传统屏蔽材料不具备的优良特性,在高集成度电子设备的电磁防护领域展现出巨大的应用潜力。
GNS/CNTs/cellulose paper composites were prepared by impregnating cellulose paper into graphene and CNTs suspension alternately.The microstructure,conductivity and electromagnetic interference (EMI) shielding performance of prepared samples were also characterized.The conductivity and EMI shielding effectiveness of samples were improved with the increase of number of impregnating cycles.After five cycles of impregnation in graphene and CNTs suspension,the composite shown a high conductivity of 7.63S/cm and a superior EMI shielding effectiveness of 22～32dB.Furthermore,as-prepared composites possessed a huge application potential in the field of electromagnetic protection for high density electric device due to their lightweight,ultrathin and flexible characteristics that traditional EMI shielding materials were not able to have.
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基金资助
国家自然科学基金(U1710115);山西省自然科学基金面上项目(201701D121050);中国电科联合基金(6401B08110304)
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