Fabrication and investigation on the ultra-thin and flexible Ti3C2Tx/co-doped polyaniline electromagnetic interference shielding composite films

By Yali Zhang, Lei Wang, Junliang Zhang, Ping Song, Zhuorui Xiao, Chaobo Liang, Huaili Qiu, Jie Kong, Junwei Gu. Composites Science And Technology, 2019

252 citations recorded by the source corpus.

Abstract Polyaniline (PANI) was co-doped using dodecylbenzenesulfonic acid (DBSA) and hydrochloric acid (HCl), and few-layered Ti3C2Tx was prepared via ionic intercalation followed by sonication-assisted method. Then the Ti3C2Tx/co-doped PANI (Ti3C2Tx/c-PANI) electromagnetic interference (EMI) shielding composite films were prepared by vacuum assisted filtration. FTIR, XPS, XRD, and Raman indicated that c-PANI was successfully synthesized. XRD, SEM, AFM, and TEM revealed the successful preparation of few-layered Ti3C2Tx. The electrical conductivity, EMI shielding effectiveness (EMI SE), and tensile strength of the Ti3C2Tx/c-PANI EMI shielding composite films were all increased with increasing the mass fraction of Ti3C2Tx. When the mass ratio of Ti3C2Tx to c-PANI was 7:1, the thickness of Ti3C2Tx/c-PANI composite film was only 40 μm. And the corresponding electrical conductivity, EMI SE, and tensile strength were significantly enhanced to 24.4 S/cm, 36 dB, and 19.9 MPa, which were 81, 2.3, and 7.7 times those of pure c-PANI film (0.3 S/cm, 16 dB, and 2.6 MPa), respectively. Our fabricated Ti3C2Tx/c-PANI EMI shielding composite films present potential applications in the high-tech fields with demand for ultrathin, lightweight, and flexible EMI shielding materials.

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