Green preparation of high-yield and large-size hydrophilic boron nitride nanosheets by tannic acid-assisted aqueous ball milling for thermal management

Wu, Ni; Yang, Wang; Che, Sai; Sun, Li; Li, Huawei; Ma, Guangfu; Sun, Yong; Liu, Hongchen; Wang, Xiaobai; Li, Yongfeng

doi:10.1016/j.compositesa.2022.107266

Cited by 25 publications

(25 citation statements)

References 64 publications

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“…Figure 2G illustrates that the exfoliated BNNSs are transparent and flat, suggesting that h‐BN was successfully exfoliated into BNNSs. [ 43 ] The inset shows the selected area electron diffraction (SAED) pattern illustrating that the hexagonal lattice structure of h‐BN has been preserved after ultrasonic treatment. However, subtle alterations in the lateral size of BNNSs have been observed, implying that the ultrasonic treatment may somewhat maintain the lateral size integrity of BNNSs.…”

Section: Resultsmentioning

confidence: 99%

Improvement of “point‐plane”‐like hetero‐structured fillers on thermal conductivity of poly(vinyl alcohol) composites

Zhang

2023

Polymer Composites

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With the rapid growth of highly integrated electrical devices, the urgent demand for polymer composites with high thermal conductivity (TC) is increasing for effective thermal management. In this work, boron nitride nanosheets (BNNSs) were chemically grafted with aluminum oxide (Al2O3) to develop hetero‐structured filler (BNNSs@Al2O3). The BNNSs@Al2O3 fillers were uniformly dispersed in the poly(vinyl alcohol) (PVA) by solvent mixing, verified by SEM, and the oriented BNNSs@Al2O3/PVA composites were produced by the doctor blade method. The results exhibited that the synergistic effect of BNNSs and Al2O3 was achieved, and the thermal conductivities of BNNSs@Al2O3/PVA composites were improved. When keeping the filler content at 30 wt%, the in‐plane and out‐of‐plane TC of BNNSs@Al2O3/PVA composite reached 5.641 and 0.651 W/(m·K), respectively. The BNNSs@Al2O3 filler may improve the performance of composite heat dissipation by reducing the interfacial resistance between fillers and making it easier to establish directed heat‐transfer pathways. This composite demonstrates promising application in the field of electronic packaging.

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Section: Resultsmentioning

confidence: 99%

Improvement of “point‐plane”‐like hetero‐structured fillers on thermal conductivity of poly(vinyl alcohol) composites

Zhang

2023

Polymer Composites

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“…Figure shows a schematic diagram of the production of the PT/fBN/Al 2 O 3 /PDMS composite by a surface treatment and a hydrothermal process. To improve the solution processability of the hydrophobic BN feedstock (Figure S1), surface-functionalized BN nanosheets (fBN) were obtained by our previously reported work on the tannic acid (TA)-assisted ball milling technique . TA is an environmentally friendly modifier rich in hydrophilic hydroxyl groups and has superb adhesion ability .…”

Section: Resultsmentioning

confidence: 99%

“…First, PU foam was soaked in TA solution for sonication for about 30 min and then dried to get the hydrophilic TA-modified PU (PT) foam. Second, the TA-functionalized BN nanosheets (fBN) were prepared by our previous work . Finally, PT was put into the fBN dispersion with concentrations of 25, 50, 75, 100, and 125 mg/mL, loaded into a stainless-steel kettle, and subjected to hydrothermal treatment at 80 °C for 4 h. After cooling to room temperature, the foam was taken out, squeezed to remove the excess dispersion, and dried to obtain the fBN-coated PT foam (PT/fBN- x , where x is the initial fBN slurry concentration).…”

Section: Methodsmentioning

confidence: 99%

“…To improve the solution processability of the hydrophobic BN feedstock (Figure S1), surface-functionalized BN nanosheets (fBN) were obtained by our previously reported work on the tannic acid (TA)-assisted ball milling technique. 21 TA is an environmentally friendly modifier rich in hydrophilic hydroxyl groups and has superb adhesion ability. 22 The fBN nanosheets with an average size of about 8 μm (Figure 2b) exhibit improved hydrophilicity and good dispersion stability in water (Figures S1 and S2).…”

Section: Production and Characterization Of Pt/fbn/mentioning

confidence: 99%

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Dual Network Structures of Polyurethane/Boron Nitride Nanosheets/Alumina for Improved Thermal Management of Polymers

Wu,

Che,

Sun

et al. 2023

ACS Appl. Nano Mater.

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The development of efficient thermally conductive polymer composites is crucial for the performance upgrade of modern electronics. However, the thermal conductivity of polymer composites is dramatically limited by inadequate thermal networks and mechanical properties degradation. Herein, we report the preparation of polydimethylsiloxane (PDMS) composites with dual thermal networks of functionalized boron nitride nanosheets (fBNs) and alumina (Al2O3) spheres impregnated in commercial polyurethane (PU) foams. The fBN layers are first assembled hydrothermally onto the surface of tannic acid (TA)-modified PU foam (PT) to form a 3D fBN network, followed by the vacuum infiltration of Al2O3/PDMS to obtain PT/fBN/Al2O3/PDMS composites. The thermal conductivity of the composite reaches 3.1 W/mK at 11.5 wt % fBN and 15 wt % Al2O3 loading, with a 2285% enhancement compared to that of pure PDMS. Moreover, the resulting composite shows excellent practical performance in the heat dissipation simulation of integrated chips, demonstrating the broad prospect for thermal management applications. Additionally, the mechanical properties of the composite are significantly improved. This work provides a promising strategy for the production of polymer-based high-performance thermal management materials.

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“…The materials based on polymers have intrinsic low thermal conductivity. , Polymer materials enriched with highly thermal conductive fillers open the door for enhancing the thermal conductivity of polymer composites. , Recently, the number of attempts to develop highly thermal conductive polymer composites based on different types of highly thermal conductive fillers has increased rapidly, including graphene (GR) sheets, carbon black (CB) particles, carbon nanotubes (CNT), ZnO, and boron nitride nanosheets (BNNSs) . Among them, BNNSs, which exhibit outstanding thermal conductivity (300–2000 W·m –1 ·K –1 ), − superior fracture strength (165 GPa), high Young’s modulus (0.8 TPa), high thermal stability (up to 800 °C in the air), , and excellent thermal expansion coefficient (−2.72 × 10 –6 K –1 ), are the most promising filler to obtain highly thermal conductive composites. , There are various ways to obtain BNNS-based thermal conductive composites, including dip coating, wet spinning, self-assembly, casting, 3D printing, and so on. However, BNNS-based composites prepared by these methods either displayed low thermal conductivity or were loaded with a large amount of BNNSs which restricted further application.…”

Section: Introductionmentioning

confidence: 99%

Thermo-Conductive, Air-Permeable, and Hydrophobic Sulfonated Poly(Styrene-Ethylene/Butylene-Styrene)/Boron Nitride Nanosheet Nanofiber Membranes for Wearables via One-Step Electrospinning

Zeng

Zhang

et al. 2023

ACS Appl. Polym. Mater.

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Polymer materials based on highly thermal conductive fillers have emerged as an effective way to achieve wearable thermal management such as personal cooling, thermal management of wearable devices, and so on. Highly thermal conductive fillers, such as boron nitride nanosheets (BNNSs), integrated with fibrous materials are a promising way to construct highly thermal conductive polymer materials. However, many fabrication processes are complex and time consuming. Also, a large amount of BNNSs was loaded into the resultant materials to enhance thermal conductivity. Here, we first prepared hydrophobics sulfonated poly(styrene-ethylene/butylenestyrene) (S-SEBS)/BNNS nanofiber membranes with high thermal conductivity and air permeability for efficient thermal management via facile one-step electrospinning. This strategy made BNNSs uniformly disperse along the nanofibers. Meanwhile, the porous structure remained, enhancing thermal conductivity without sacrificing air permeability. Therefore, the resultant air-permeable textiles demonstrated outstanding thermal management performance with ultrahigh in-plane thermal conductivity of 16.37 W•m −1 •K −1 and out-plane thermal conductivity of 0.1037 W•m −1 •K −1 at BNNS loading of 15 wt % as well as a hydrophobic surface which could resist stain adhesion, indicating promising utility for wearable thermal management applications.

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Green preparation of high-yield and large-size hydrophilic boron nitride nanosheets by tannic acid-assisted aqueous ball milling for thermal management

Cited by 25 publications

References 64 publications

Improvement of “point‐plane”‐like hetero‐structured fillers on thermal conductivity of poly(vinyl alcohol) composites

Improvement of “point‐plane”‐like hetero‐structured fillers on thermal conductivity of poly(vinyl alcohol) composites

Dual Network Structures of Polyurethane/Boron Nitride Nanosheets/Alumina for Improved Thermal Management of Polymers

Thermo-Conductive, Air-Permeable, and Hydrophobic Sulfonated Poly(Styrene-Ethylene/Butylene-Styrene)/Boron Nitride Nanosheet Nanofiber Membranes for Wearables via One-Step Electrospinning

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