Flexible electrospun thermotropic enhanced aeolotropic conductive film with luminescence and magnetism

Development of flexible neotype polyfunctional aeolotropic conductive films (ACFs) promotes the advancement of electronic industry and wearable devices. Herein, the novel concept of thermotropic enhanced aeolotropic conductive film (TEACF) is first proposed, and a new strategy of combining thermotropic conductivity with aeolotropic conductivity is advanced to construct TEACF by introducing thermotropic phase-change substance VO 2 into ACFs to improve the aeolotropic conductivity degree of ACFs via heating. [Polyaniline (PANI)/polymethyl methacrylate (PMMA)]//[VO 2 /PMMA]//[Tb(PABA) 3 phen/PMMA] tri-color shaped nano-belt is designed as the microscopic constructing unit to prepare flexible TEACF by directionally arranging the tri-color shaped nano-belts via a tri-axial parallel electrospinning. PANI with intrinsic conductivity offers TEACF with the room-temperature conductivity, while VO 2 contributes additional thermotropic phase-change conductivity. TEACF is endowed with thermotropic enhanced aeolotropic conductivity by heating. With the help of special-contrived tri-color shaped nano-belt as constructing unit, TEACF exhibits aeolotropic conductivity, magnetism and strong fluorescence at room temperature. However, TEACF displays enhanced aeolotropic conductivity, boosted magnetism and reduced fluorescence at 80 °C, and the conductive aeolotropy degree attains 3.61 × 10 5 . The aeolotropic conductivity, magnetism and fluorescence of TEACF are synchronously varied by regulating PANI and VO 2 contents or heating temperature. By means of these temperature-dependent multifunctional performances, the multi-scenario applications of TEACF in such as visual circuits and anti-counterfeiting are demonstrated. The design concept and manufacturing technology in this work establish a theoretical foundation and provide a technical support for the development of new-typed ACFs.