Poly(vinyl alcohol)/MXene biomimetic aerogels with tunable mechanical properties and electromagnetic interference shielding performance controlled by pore structure

Flexible Polypyrrole Nanotube–Polyethylene Glycol–Polyvinyl Alcohol Hydrogels for Enhanced Electromagnetic Shielding

“…Even so, the mechanical properties of the composite films are still favorable for the practical applications. In terms of Figure b, our prepared PPPg delivers superior mechanical behavior, as compared to previous works, regarding the maximum stress and the corresponding tensile elastic strain, such as EMIM-TFSI (5 MPa, 31%), CNC/MXene (1.025 MPa, 675%), T 6 PAM (0.819 MPa, 80%), PG5H10 (2.6 MPa, 12%), Fe 3 O 4 /PEDOT: PSS/PVA (0.55 MPa, 850%), RGO-Ga (0.06 MPa, 70%) and PVA/MXene (0.6 MPa, 80%) . After more than 20 times bending and folding, it can be observed that the prepared PPPg-20 still possesses great flexibility (Figure c,d).…”

“…In terms of Figure 4b, our prepared PPPg delivers superior mechanical behavior, as compared to previous works, regarding the maximum stress and the corresponding tensile elastic strain, such as EMIM-TFSI (5 MPa, 31%), 38 CNC/MXene (1.025 MPa, 675%), 39 T 6 PAM (0.819 MPa, 80%), 40 PG5H10 (2.6 MPa, 12%), 41 Fe 3 O 4 / PEDOT: PSS/PVA (0.55 MPa, 850%), 42 RGO-Ga (0.06 MPa, 70%) 43 and PVA/MXene (0.6 MPa, 80%). 44 After more than 20 times bending and folding, it can be observed that the prepared PPPg-20 still possesses great flexibility (Figure 4c,d). Moreover, to further study the EMI SE change, folded PPPg-20 and PPPg-50 nanocomposite hydrogels are labeled as PPPg-20+ and PPPg-50+, respectively.…”

Research Progress on Two-Dimensional Layered MXene/Elastomer Nanocomposites

“…MXene dispersions can be prepared as light and low-density aerogels by freeze-drying and other methods, but the gelling ability of MXene is weak. Thus, graphene oxide [ 51 ], polyvinyl alcohol [ 52 ], alginate, or other solutions mixed with MXene are usually required to prepare porous aerogels to form a stable network through hydrogen bonding and electrostatic, gel, and ionic interactions [ 53 ]. Alternatively, MXene can be directly adsorbed on skeletons, such as cellulose scaffolds or nickel foams, to form a 3D network.…”

Tuning the Self-Assembled Morphology of Ti3C2Tx MXene-Based Hybrids for High-Performance Electromagnetic Interference Shielding

“…By increasing the concentration of initial MXene suspension from 25 to 45 mg/mL, the porosity and the total thickness of the final aerogels continuously decrease while the MXene volume fraction and the total density both increase, Figure 4g (Table S5, Supporting Information). The elemental distribution of MP [35] To confirm the morphological data calculated based on SEM images, the nanostructural parameters of the aerogels are evaluated by XRD patterns (Figure S10 and Table S6, Supporting Information). Comparing the alignment degree, i.e., intensity(002)/intensity(110), of MP [25,45] 4h.…”

“…The morphological features, such as the pore sizes and the thickness/alignment of pores' walls, are reported as structural parameters that can significantly influence the absorption loss of the porous assemblies. 34,35,48 While MXene/polymer hybrid films and three-dimensional (3D) porous structures offer a significant improvement in EMI shielding, 26,34,49 there is still a lack of knowledge on how the self-assembled morphology at the nanoscale controls the EMI shielding effectiveness. Additionally, the dominant EMI shielding mechanism has been shown that varies depending on the surface chemistry of MXene nanosheets and their structural properties, 50,51 which in turn are highly influenced by the MXene synthesis and storage condition.…”