Effect of composite surface treatment on heat dissipation of LEDs

Li, Qiaomei; Gui, Yingang; Mu, Qiwu; Ran, Qing; Liu, Hui

doi:10.1016/j.matdes.2015.10.032

Cited by 8 publications

(2 citation statements)

References 30 publications

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Section: Introductionmentioning

confidence: 99%

“…Purified or raw BNNTs are then usually functionalized to enable processing into thin films or composite materials. This may be achieved by a variety of processes including ultrasonic agitation in water, 19 alcohol, 20 or ammonia; 21 autoclave processing in peroxides 22−24 or steam; 25 direct functionalization with alkoxy groups, 22 isocyanates, 26,27 amines, 28 bromohexane, 29 grafted polyamides, 8 strong acids, 30,31 and silane coupling agents; 23,29,30,32 bead-32 or ball-milling; 28,33,34 plasma treatment; 35 and simple thermal exposure. 36 In contrast to the functionalization methods described, the potential to combine ultrasonics and an aqueous-based advanced oxidation process 37−40 (AOP) offers good potential in scalability, reduced environmental impact, and an aqueous dispersion immediately suitable for processing, without the requirement to remove solvents, polymers, acids, or other undesirable chemicals.…”

Section: ■ Introductionmentioning

confidence: 99%

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Development of Stable Boron Nitride Nanotube and Hexagonal Boron Nitride Dispersions for Electrophoretic Deposition

et al. 2020

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Boron nitride nanotubes (BNNTs) represent a relatively new class of materials that provides alternative electrical and thermal properties to the carbon analogue. The high chemical and thermal stability and large band gap combined with high electrical resistance make BNNTs desirable in several thin-film applications. In this study, stable BNNT and hexagonal boron nitride (hBN) particle dispersions have been developed using environmentally friendly advanced oxidation processing (AOP) that can be further modified for electrophoretic deposition (EPD) to produce thin films. The characterization of the dispersions has revealed how the hydroxyl radicals produced in AOP react with BNNT/hBN and contaminant boron nanoparticles (BNPs). While the radicals remove the carbon contaminant present on BNNT/ hBN and increase dispersion stability, they also oxidize the BNPs and the boron oxide produced, which, conversely, reduces the dispersion stability. The use of high-or low-powered ultrasonication in combination with the AOP affects the rate of the competing reactions, with low-powered sonication and AOP providing the best combination for producing stable dispersions with high concentrations. BNNT/hBN dispersions were functionalized with polyethyleneimine to facilitate EPD, where films of several micrometer thickness were readily deposited onto stainless steel and glass-fiber fabrics. BNNT/hBN films produced on glass fabrics by EPD exhibited a consistent through-thickness macroporosity that was facilitated by platelet and nanotube stacking. The film macroporosity present on the coated fabrics was suitable for use as separator layers in supercapacitors and provided improved device robustness with a minimal impact on electrochemical performance.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Development of Stable Boron Nitride Nanotube and Hexagonal Boron Nitride Dispersions for Electrophoretic Deposition

et al. 2020

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Strong breathable membrane with excellent self‐cleaning, wave‐transparent, and heat dissipation performances

Wang

Zhao

et al. 2021

J of Applied Polymer Sci

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Multifunctional membranes with outstanding heat dissipation, wave‐transparent, and self‐cleaning performance, as well as strength and ventilation, are urgently needed to meet the rapid development of portable electronics. Herein, we reported an improved phase separation process to prepare thermoplastic polyurethane (TPU)/multi‐wall carbon nanotube (MWCNT) composite membranes with open‐cell porous structure. Their morphology can be manipulated by regulating the content of MWCNT and varying processing parameters. These TPU/MWCNT composite membranes exhibit outstanding mechanical properties. For example, they can possess elastic deformation behavior in a wide temperature range from −50 to 100°C, and bear a load of more than 40,000 times their own weight. Moreover, there is not any obvious crease on the surface of membranes after a forced folding process, indicating their outstanding shape‐recovery ability and elasticity. Furthermore, these membranes have low dielectric constant and loss factor, and they are almost transparent to X‐band electromagnetic waves. What's more, these membranes also show outstanding water‐vapor breathable performance. In addition, MWCNT and open‐cell porous structure endow TPU/MWCNT membranes efficient heat dissipation capacity and good self‐cleaning performance.

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Heat dissipation on electrical conductor composites by combination of carbon nanotubes and graphene nanoplatelets

et al. 2018

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Effect of composite surface treatment on heat dissipation of LEDs

Cited by 8 publications

References 30 publications

Development of Stable Boron Nitride Nanotube and Hexagonal Boron Nitride Dispersions for Electrophoretic Deposition

Development of Stable Boron Nitride Nanotube and Hexagonal Boron Nitride Dispersions for Electrophoretic Deposition

Strong breathable membrane with excellent self‐cleaning, wave‐transparent, and heat dissipation performances

Heat dissipation on electrical conductor composites by combination of carbon nanotubes and graphene nanoplatelets

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