Utilizing modules of different functions to construct a Janus-type membrane and derivative 3D Janus-type tube displaying synchronous trifunction of conductive aeolotropism, magnetism and luminescence

Abstract

The microstructures and macrostructures play a crucial role in the properties and applications of multifunctional materials. Herein, microscopic partition and macroscopic partition are combined by devising and preparing different modules that can be elaborately devised to possess specific performances. A two-dimensional (2D) 3-module Janus-type membrane multifunctionalized by conductive aeolotropism, magnetism and luminescence (defined as 3M-CML Janus-type membrane) is constructed via electro-spinning. The modular structure of 3M-CML Janus-type membrane is obtained by devising and constructing three different modules, including luminescence module (denoted as L module), conductive aeolotropism-luminescence module (marked as C-L module) and magnetism-luminescence module (named as M-L module). The results prove that almost no mutual detrimental influences exist among different modules owing to the macroscopic modular structure and Janus-type structure, which effectively avoids the negative interactions among different materials. Tb(BA)3phen/PVP nanofiber, [PMMA/Eu(BA)3phen]//[PMMA/PANI] Janus-type nanoribbon and [PMMA/Tb(BA)3phen]//[PMMA/Fe3O4] Janus-type nanoribbon are, respectively, selected as building units of the three modules, which further prevents the negative interactions among different materials and improves the versatility of 3M-CML Janus-type membrane. The luminescence, adjustable conductive aeolotropism and variable magnetism of 3M-CML Janus-type membrane are systematically discussed. Meanwhile, novel flexible four types of brand-new three-dimensional (3D) Janus-type tubes are obtained by rolling modularly devised 2D 3M-CML Janus-type membrane with different rolling schemes. As derivatives of the 2D 3M-CML Janus-type membranes, macroscopic 3D Janus-types tubes exhibit similar performances to 2D 3M-CML Janus-type membranes. The 2D Janus-type membrane and 3D Janus-type tube will have momentous applications in flexible electronics and nanodevices in the future.

Construction of Semi-Bianisotropic Conductive Janus-Structure Membrane Offering Magnetism and Fluorescence by Utilizing Different Functional Blocks

“…The fluorescence intensity of C-R block (top) significantly reduces with increase in PANI content (Figure 3c). It is because the dark materials can absorb some fluorescence according to previous research [12]. The characteristic emission peaks of Eu 3+ ions at 593 and 615 nm are separately derived from 5 D 0 → 7 F 1 (593 nm) and 5…”

The High Flux of Superhydrophilic-Superhydrophobic Janus Membrane of cPVA-PVDF/PMMA/GO by Layer-by-Layer Electrospinning for High Efficiency Oil-Water Separation

“…The obtained membrane was dried in an oven at 60 °C for 12 h. The detailed process of cross-linked PVA (cPVA) is shown in Figure 1 b. After that, the membrane was immersed in the crosslinking solution with GA as the crosslinking agent and hydrochloric acid as the crosslinking catalyst for 10 min [ 37 ]. Then the membrane was washed several times with 1% potassium dihydrogen phosphate solution, and dried at room temperature for 24 h. Finally, the Janus membrane was obtained.…”

“…Conversely, hydrophilic nanofibers can also be electrospun onto hydrophobic fibers. When Janus membrane is produced by this method, a variety of polymers can be selected, including polyurethane (PU) [ 14 , 16 , 20 , 21 , 22 ], polyvinylidene fluoride (PVDF) [ 19 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 ], polymethyl methacrylate (PMMA) [ 34 , 35 , 36 , 37 ], polylactic acid (PLA) [ 38 , 39 ], polystyrene (PS) [ 26 , 40 ], polyvinyl alcohol (PVA) [ 21 , 41 ], cellulose acetate (CA) [ 22 , 23 , 33 , 40 , 42 ], polyacrylonitrile (PAN) [ 16 , 21 , 23 , 26 , 34 , 40 , 43 , 44 , 45 ], etc. At the same time, by adding hydrophilic and hydrophobic modifiers to the electrospinning solution, its properties can also be changed.…”

2D Dual Anisotropic Conductive Janus Nanostrips Array Pellicle and Derivative 3D Janus‐structural Pipe Concurrently Endowed with Magnetism and Red‐green Two‐colored Fluorescence

“…Liu, et al [18] have fabricated polyimide-graphene nanoribbon/carbon nanotube with great stability anisotropic conductive composite film, and the conductance value of the composite film along the array direction of the fibers was 10 6 times higher than that of the direction perpendicular to the array direction. Xie, et al [19] fabricated a kind of three modules anisotropic electric-magnetic-luminescent tri-function Janus film using Janus nanoribbon as the construction unit. This modular Janus film realized both micro and macro partition, avoiding the interplay between various functions.…”