Preparation of Highly Thermally Conductive Polymer Composite at Low Filler Content via a Self-Assembly Process between Polystyrene Microspheres and Boron Nitride Nanosheets

Wang, Xiongwei; Wu, Peiyi

doi:10.1021/acsami.7b04768

Cited by 199 publications

(115 citation statements)

References 61 publications

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“…These results confirmed that, using sonication in a water solution, the lattice structure of BP nanosheets was destroyed and lots of phosphate groups were formed on the surface of BP nanosheets. These introduced phosphate groups imparted a negatively charged nature to BP nanosheets, thus supporting scalable electrostatic‐derived LbL assembly . After being characterized by AFM, the detected thickness values of BP nanosheets were 6.247 and 2.809 nm, confirming the thin‐layer structure (Figure ).…”

Section: Resultsmentioning

confidence: 62%

Black Phosphorous Nanosheets: A Novel Solar Vapor Generator

Cai

Pan

et al. 2020

Solar RRL

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Solar vapor generation is a promising and whole new branch of photothermal conversion for harvesting solar energy. In this work, a novel solar vapor generator based on black phosphorous (BP) nanosheets is designed for steam generation, desalination, as well as dye removal, using polyurethane (PU) foam as a supporting material. Employing electrostatic layer‐by‐layer assembly, BP nanosheets and chitosan (CS) are alternately deposited onto the skeleton of the PU foam. After the deposition of BP nanosheets, the hydrophilicity of the PU composite foam is obviously improved, thus facilitating the capillary effect. Even with a spot of BP nanosheets (lower than 5.0 wt%), the as‐fabricated PU@(sodium alginate, SA/BP)6 foam exhibits a surface temperature of ≈70.9 °C and an evaporation rate of 1.082 kg m−2 h−1 under 1 sun irradiation. Due to the protection effect of CS, the photothermal conversion performance and water evaporation rate do not deteriorate during ten cycles of reusing. In addition, the water evaporation performance of PU@(SA/BP)6 is also investigated under different conditions, including sun irradiation intensity, metal ions, and dye. In brief, employing a facile and eco‐friendly fabrication process, BP nanosheets are first applied to seawater desalination and pollution removal, presenting a tremendous potential for practical solar vapor generation.

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Section: Resultsmentioning

confidence: 62%

Black Phosphorous Nanosheets: A Novel Solar Vapor Generator

Cai

Pan

et al. 2020

Solar RRL

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“…On the other hand, the noncovalent functionalization of h‐BN nanosheets provides another approach for its organic modification. According to the reported literatures, h‐BN nanosheets is electronegative, indicating the reliability of functionalized modification with electrostatic interaction. Cetyl‐trimethylammonium bromide (CTAB) as a kind of cationic surfactant with long‐alkyl chains has been widely used.…”

Section: Introductionmentioning

confidence: 76%

Facile fabrication of organically modified boron nitride nanosheets and its effect on the thermal stability, flame retardant, and mechanical properties of thermoplastic polyurethane

Cai

Pan

et al. 2018

Polymers for Advanced Techs

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Although hexagonal boron nitride (h‐BN) has presented a potential prospect in polymer composite fields, undesirable interfacial interaction with polymer matrix that generates serious aggregation of nanomaterials has suppressed its enhancement effect. Moreover, the chemically inert surface of h‐BN also makes the commonly used approach that improves the interfacial interaction between nanofillers and polymeric matrix invalid. Herein, the functionalized modification of chemically inert h‐BN was successfully fabricated by the adsorption of cetyl‐trimethylammonium bromide, with electrostatic interactions. The obtained h‐BN (cetyl‐trimethylammonium bromide‐BN) was well characterized by systematic tests and then added into thermoplastic polyurethane (TPU) matrix. The inclusion of functionalized h‐BN can dramatically improve thermal stability, flame retardant, and mechanical properties of TPU composites. With the incorporation of as low as 4.0 wt% nanofillers, maximal value of heat release rate and total heat release of TPU were reduced by 57.5% and 17.8%, compared with those of pure TPU, respectively. Moreover, tensile strength of TPU composite with a loading of 2.0 wt% was increased by 79.3% in comparison with that of neat TPU. The facile functionalized approach of chemically inert h‐BN paves the way for promising applications of h‐BN in the development of flame retardant polymer materials.

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“…prepared nanocomposite films of poly(vinyl alcohol) (PVA) with thermal diffusivity of up to 9 mm 2 s −1 at 15 vol % boron nitride (BN) nanosheets, which was exfoliated from h‐BN. Wang and Wu recently fabricated a polystyrene (PS) composite with a thermal conductivity of 8.0 Wm −1 K −1 at 13.4 vol % BN nanosheets loading by a two‐step process: first forming the complex microspheres by electrostatic self‐assembly between BN nanosheets and PS microspheres and then hot‐pressing the as‐prepared complex microspheres. The above investigations exhibited the superiority of two‐dimensional (2D) materials for TIMs.…”

Section: Introductionmentioning

confidence: 99%

Synergistic effects on the enhancement of thermal conductive properties of thermal greases

Wang

2019

J of Applied Polymer Sci

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Efficient heat dissipation from electronic devices with high‐degree integration and high‐power density has become an urgent and complex problem. We report here novel thermal greases with an enhanced thermal conductivity using graphene flakes (GFs), hexagonal boron nitride (h‐BN), and hydroxypropyl cellulose (HPC) as fillers. The obtained GF/h‐BN/HPC thermal grease at 23 vol % h‐BN loading exhibits a thermal conductivity enhancement 555%, compared with the pure PDMS matrix, and also about 50, 169, and 115% higher than that with GF/h‐BN, h‐BN/HPC and h‐BN as the filler for the thermal grease, respectively. We attribute it to the synergistic effects among GF, h‐BN, and HPC, due to the formation of thermally conductive networks. This study provides a strategy for preparing thermal greases for thermal management applications. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47726.

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Preparation of Highly Thermally Conductive Polymer Composite at Low Filler Content via a Self-Assembly Process between Polystyrene Microspheres and Boron Nitride Nanosheets

Cited by 199 publications

References 61 publications

Black Phosphorous Nanosheets: A Novel Solar Vapor Generator

Black Phosphorous Nanosheets: A Novel Solar Vapor Generator

Facile fabrication of organically modified boron nitride nanosheets and its effect on the thermal stability, flame retardant, and mechanical properties of thermoplastic polyurethane

Synergistic effects on the enhancement of thermal conductive properties of thermal greases

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