Constructing a “Pearl-Necklace-Like” architecture for enhancing thermal conductivity of composite films by electrospinning

Wei, Zhouqiao; Kong, Xiangdong; Cheng, Jingzhen; Zhou, Hua; Yu, Jinhong; Lu, Shaorong

doi:10.1016/j.coco.2021.101036

Cited by 26 publications

(16 citation statements)

References 51 publications

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“…The volume resistance and surface resistance of pure PVA and composite films were shown in Figures a and S11. With the increase of BP@PDA content, the volume resistance and surface resistance were slightly decreased to 4.6 × 10 10 Ω·cm and 1.85 × 10 10 Ω at 30 wt % of BP@PDA, but they were higher than the insulation standards of 1 × 10 9 Ω·cm and 1 × 10 9 Ω, respectively . This mainly attributed to the semiconductor characteristics of BP particles.…”

Section: Results and Discussionmentioning

confidence: 91%

Constructing Sandwich-Structured Poly(vinyl alcohol) Composite Films with Thermal Conductive and Electrical Performance

Zhang

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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With the miniaturization and high integration development in microelectronic devices, the problem of heat dissipation has attracted widespread attention. Highly thermal conductive and electrical insulation polymer composites show great advantages to solve the problems of heat dissipation. Nevertheless, the fabrication of polymer composites with both excellent thermal conductivity and electrical performance is still a great challenge. Herein, to coordinate the thermal and electrical properties of the composite film, the sandwich-structured poly(vinyl alcohol) (PVA)/boron phosphide (BP)-boron nitride nanosheet (BNNS) composite films were prepared, with the PVA/BP composite film as the top and bottom layers and the BNNS layer as the middle layer. When the filler loading was 31.92 wt %, the sandwich-structured composite films showed excellent in-plane thermal conductivity (9.45 W·m–1·K–1), low dielectric constant (1.25 at 102 Hz), and excellent breakdown strength. In the composite film, the interconnected BP particles and BNNS layer formed several heat dissipation pathways to increase the thermal conductivity, while the insulated BNNS layer hampered the electron transformation to enhance the electrical resistivity of films. Therefore, the PVA/BP-BNNS composite films showed a potential application in heat dissipation of high power electronic devices.

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Section: Results and Discussionmentioning

confidence: 91%

Constructing Sandwich-Structured Poly(vinyl alcohol) Composite Films with Thermal Conductive and Electrical Performance

Zhang

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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“…In the study of Wei et al , pearl-necklace-like PVA/Al 2 O 3 nanofibers were fabricated by e-spinning. 33 Because Al 2 O 3 is hydrophilic and PVA is water soluble, the prepared mixed precursor can be directly e-spun. The results showed that, with the increase of Al 2 O 3 content, the fiber surface gradually became rough.…”

Section: High Thermal Conductivitymentioning

confidence: 99%

Electrospun polymer nanocomposites for thermal management: a review

et al. 2023

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“…[215,216] ES results in submicron fibrous materials that offer a variety of advantages such as tunable porosity, high surface area-to-volume ratio, and composition manipulation. [217,218] A variety of inorganic NPs have been incorporated into electrospun polymer nanofibers to create necklace-like structures, including SiO 2 , [61,164] gold, [15] TiO 2 , [219] Al 2 O 3 , [220] BiFeO 3 , [52] and Ni 0.5 Zn 0.5 Fe 2 O 4 nanofibers. [221] For example, Yang et al used the ES technique to craft PVA/SiO 2 NNs (Figure 13A).…”

Section: Electrospinning (Es) Techniquementioning

confidence: 99%

“…A variety of inorganic NPs have been incorporated into electrospun polymer nanofibers to create necklace‐like structures, including SiO 2 , [ 61,164 ] gold, [ 15 ] TiO 2 , [ 219 ] Al 2 O 3 , [ 220 ] BiFeO 3 , [ 52 ] and Ni 0.5 Zn 0.5 Fe 2 O 4 nanofibers. [ 221 ] For example, Yang et al.…”

Section: Synthesis Of Nnsmentioning

confidence: 99%

Necklace‐Like Nanostructures: From Fabrication, Properties to Applications

et al. 2022

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or loop shapes. The particles (i.e., building blocks) could be spherical spheres, cubes, rods, disks, bipyramids, etc. Another type of NNs are formed when the particles are connected by linkers or threaded onto a string or stem (type II). The strings or stems could be polymer chains, nanowires, nanorods, nanotubes, nanobelts, etc. The third type of NNs is comprised of particles that are deposited on a robust support to form a periodic arrangement that resembles a necklace (type III). The supports could be polymers, nanorods, nanotubes, nanofibers, etc.Although these three types of necklacelike nanostructures are quite different from each other in shape and morphology, they all possess some common features, such as intrinsic high surface area, abundant transport channels, exposure of each component to the surface, and multiscale roughness of the surface (as compared to other 1D nanogeometries such as rods, wires, fibers, tubes, and belts). Most type I necklace-like nanostructures are discontinuous structures that consist of 1D aligned building blocks. The interparticle distance between the building blocks is crucial to the properties of the necklace-like nanostructures. When the interparticle distance is sufficiently short, coherent optical properties are obtained through near-field coupling of their surface plasmon resonances. [11] Additionally, electromagnetic coupling between isolated nanoparticles (NPs) is much lower than the electromagnetic interactions between NPs in close proximity in a necklace-like nanostructure. [12] The static electromagnetic interactions between neighboring metallic NPs in necklacelike nanostructures may contribute to an enhancement of nonlinear optical properties and surface-enhanced Raman scattering (SERS) effect. For type II necklace-like nanostructures, the bead-on-string architecture may provide facile electron transfer and percolation, an open scaffold for ion accessibility, maximized surface area to volume ratio, and good strain tolerance, all of which are highly conducive to energy storage. [13] For type III necklace-like nanostructures, the percolating clusters of metallic or semiconductor NPs show different electrical properties because of their interparticle electron transport. [14] Thus, decorating metallic or semiconductor NPs over a robust support to form necklace-like structures is a promising strategy to craft single-electron devices. [15] Notably, NNs possess a unique surface morphology that is distinctly different from the smooth surface of nanorods, nanotubes, and nanowires. Necklace-like structures possess multiscale roughness, which renders themThe shape-controlled synthesis of nanocrystals remains a hot research topic in nanotechnology. Particularly, the fabrication of 1D structures such as wires, rods, belts, and tubes has been an interesting and important subject within nanoscience in the last few decades. 1D necklace-like micro/nanostructures are a sophisticated geometry that has attracted increasing attention due to their anisotropic and periodic structure, in...

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Constructing a “Pearl-Necklace-Like” architecture for enhancing thermal conductivity of composite films by electrospinning

Cited by 26 publications

References 51 publications

Constructing Sandwich-Structured Poly(vinyl alcohol) Composite Films with Thermal Conductive and Electrical Performance

Constructing Sandwich-Structured Poly(vinyl alcohol) Composite Films with Thermal Conductive and Electrical Performance

Electrospun polymer nanocomposites for thermal management: a review

Necklace‐Like Nanostructures: From Fabrication, Properties to Applications

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