Incorporating MXene into Boron Nitride/Poly(Vinyl Alcohol) Composite Films to Enhance Thermal and Mechanical Properties

Abstract

Aggregated boron nitride (ABN) is advantageous for increasing the packing and thermal conductivity of the matrix in composite materials, but can deteriorate the mechanical properties by breaking during processing. In addition, there are few studies on the use of Ti3C2 MXene as thermally conductive fillers. Herein, the development of a novel composite film is described. It incorporates MXene and ABN into poly(vinyl alcohol) (PVA) to achieve a high thermal conductivity. Polysilazane (PSZ)-coated ABN formed a heat conduction path in the composite film, and MXene supported it to further improve the thermal conductivity. The prepared polymer composite film is shown to provide through-plane and in-plane thermal conductivities of 1.51 and 4.28 W/mK at total filler contents of 44 wt.%. The composite film is also shown to exhibit a tensile strength of 11.96 MPa, which is much greater than that without MXene. Thus, it demonstrates that incorporating MXene as a thermally conductive filler can enhance the thermal and mechanical properties of composite films.

Amino Termination of Ti3C2 MXene Induces its Graphene Hybridized Film with Enhanced Ordered Nanostructure and Excellent Multiperformance

“…In order to depict this feature, the tensile strength and thermal conductivity of 3rGO/7Ti 3 C 2 ‐NH 2 film were compared with that of other similar high‐performance films. [ 26,31,56–68 ] As shown in Figure 5e and Table S2 (Supporting Information), the 3rGO/7Ti 3 C 2 ‐NH 2 film exhibits the best comprehensive virtues including mechanical and heat dissipative properties. It is worth noting that zero thermal conductivity for some materials in Figure 5e implies they are lack of measured values rather than zero actually.…”

NIR‐II Responsive Inorganic 2D Nanomaterials for Cancer Photothermal Therapy: Recent Advances and Future Challenges

“…[ 262 ] 2021 Ti 3 C 2 MXene as thermally conductive fillers also enhanced through‐plane and in‐plane thermal conductivities of PVA modified aggregated boron nitride (ABN) with contents of 44 wt% to 1.51 and 4.28 W m −1 K −1 . [ 266 ] The thermal conductivity of PVA/MXene multilayered films were enhanced by almost 23‐fold to 4.57 W m −1 K −1 compared with that of pure PVA. [ 267 ] Multilayer Ti 3 C 2 nanosheets enhanced thermal conductivities in both through‐plane and in‐plane directions of Ti 3 C 2 /epoxy composites with content of 30 wt% to 3.14 and 0.294 W m −1 K −1 due to the different direction and ratio of Ti 3 C 2 in epoxy matrix.…”

Multilayer MXene Heterostructures and Nanohybrids for Multifunctional Applications: A Review

“…MXene-PSZ-ABN/PVA shows a 283% increase to 11.96 MPa. 178 However, filler material content higher than the threshold value may degrade the mechanical properties and cause processing issues.…”

“…Without the presence of MXene in the composite MXene-PSZ, the tensile strength is 4.22 MPa while with MXene that number increases to 6.20 MPa, an increase of 147%. MXene-PSZ-ABN/PVA shows a 283% increase to 11.96 MPa . However, filler material content higher than the threshold value may degrade the mechanical properties and cause processing issues.…”