Enhanced thermal conductivity and wear resistance of polytetrafluoroethylene via incorporating hexagonal boron nitride and alumina particles

Chen, Hong; Li, Chenxi; Yao, Quanwei; Chen, Feng; Fu, Qiang

doi:10.1002/app.51497

Cited by 21 publications

(19 citation statements)

References 43 publications

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“…The inorganic filler material is useful for improving the mechanical, thermal, and tribological properties of the polymers. An ample amount of work has been reported on the usage of conventional inorganic fillers 2–4 . Chen et al 2 used inorganics ceramic fillers hexagonal boron nitride and aluminum oxide for the development of a polytetrafluoroethylene hybrid composite.…”

Section: Introductionmentioning

confidence: 99%

“…An ample amount of work has been reported on the usage of conventional inorganic fillers. [2][3][4] Chen et al 2 used inorganics ceramic fillers hexagonal boron nitride and aluminum oxide for the development of a polytetrafluoroethylene hybrid composite. They found improvement in the thermal conductivity of composite by the addition of hexagonal boron nitride and enhancement in tribological properties in the composites by the addition of aluminum oxide.…”

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confidence: 99%

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Physical, mechanical, and sliding wear behavior of micro‐sized Linz‐Donawintz slag filled epoxy composites

Lohiya

Agrawal

et al. 2022

J of Applied Polymer Sci

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Linz-Donawintz (LD) slag is a solid waste produced during the basic oxygen furnace process of steel making and is more often disposed of on nearby land causing a disturbance in vegetation and human health. Hence, judicial management of LD slag is a need for an hour. For this purpose, the usability of LD slags as a reinforcement material in epoxy composites was investigated in the present work. In this investigation, the physical properties (density, void content, water absorption rate), mechanical properties (tensile properties, flexural properties, compressive strength, hardness), and tribological properties (sliding wear behavior) are reported. From the experimental investigation, it is found that the density, void content, and water intake capacity increase with LD slag loading. The maximum voids present in the composite is 1.92% for epoxy/40 wt. % LD slag composite. Similarly, maximum water uptake of only 0.6% is observed for composite with maximum filler content and for maximum immersion time. Further, it is observed that the strength of composite under tensile and flexural loading was compromised slightly. At 40 wt. % of LD slag, the measured tensile and flexural strength are 20.8 MPa and 28.78 MPa respectively. The strength of composites under compressive loading increases with filler content and reaches a maximum of 108 MPa for epoxy/40 wt. % LD slag composite. The high hardness of filler assists in increasing the hardness of the composites. The hardness of neat epoxy is Shore-D number 75 which increases to Shore-D number 84. With increased hardness, ultimately the specific wear rate under dry sliding conditions reduces. Taguchi's L 25 orthogonal array having four factors, each at five different levels is implemented to conduct the sliding wear tests. A forecast model is built on an artificial neural network (ANN) which successfully envisages the sliding wear performance of the composite under investigation inside and outside the experimental domain. K E Y W O R D S composites, mechanical properties, resins, thermosets 1 | INTRODUCTION An increase in urbanization and economic growth because of the new concept of industrialization and innovation in various fields leads to a sudden enhancement in quantity and types of waste. These wastes mainly include industrial waste, domestic waste, and agricultural waste. Out of the total waste generated from different

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Physical, mechanical, and sliding wear behavior of micro‐sized Linz‐Donawintz slag filled epoxy composites

Lohiya

Agrawal

et al. 2022

J of Applied Polymer Sci

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“…It can used to achieve better thermal conductivity and to control the dielectric performance of polymer system. 26 On the other hand, limited reports are available on h-BN dispersed polymer blends and composites for ESD applications. To improve the electrostatic performance of h-BN, intrinsic properties should be altered by functionalizing it such as polar, electron or optical scattering.…”

Section: Introductionmentioning

confidence: 99%

“…Hexagonal boron nitride commonly known as white graphene due to its structural arrangement similar to graphene. It can used to achieve better thermal conductivity and to control the dielectric performance of polymer system 26 . On the other hand, limited reports are available on h‐BN dispersed polymer blends and composites for ESD applications.…”

Section: Introductionmentioning

confidence: 99%

Polyvinylidene fluoride/polysulfone/air plasma defected hexagonal boron nitride emerging nano blends for electrostatic dissipation

Humbe

Joshi

Deshmukh

et al. 2022

J of Applied Polymer Sci

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In the present era electrostatic dissipation (ESD) property is crucial for packaged electronic device to protect from humidity over long duration. It was important to control the ESD for better integrated packaged electronic gadgets. Polymer blends and composites were modified with nano fillers as a promising area for ESD applications. In the present investigation, polyvinylidene fluoride (PVDF)/polysulfone (PSF) was modified by untreated (UT) and air plasma treated (PT) hexagonal boron nitride (h‐BN) by solution dispersion method. Spherulitic morphology of nano blends was foreseen through scanning electron microscopy. Surface topography was investigated by atomic force microscopy. Surface roughness was decreased due to plasma exposure. Phonon vibrations and Raman active mode of nano blends were confirmed by Raman spectroscopy mutually supporting ESD phenomenon. Increased electrical conductivity and semicircular impedance pattern of modified blends reveals an excellent ESD property disclosed by impedance spectroscopy. Moderate increased surface energy and decreased relative contact angle of modified blends may be due to the incorporation of polar groups during plasma exposure was confirmed by surface goniometer. Mechanical properties of nano blends were evaluated by universal testing machine. Increased 10–27% tensile strength and 34–55% Young's modulus of plasma treated admix composition. Softness of polymer nano blends was increased (20%) due to excellent interaction of filler and polymer host system were tested by Shore “A” durometer. Increased glass transition temperature (Tg = 16 and 30°C as function of treatment time) in view of thermal stability of modified nano blends were analyzed by thermogravimetric technique. Hence the PT h‐BN dispersed PVDF/PSF emerging polymer nano blends would be a choice for the new development for electrostatic dissipation applications.

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“…And due to the low dielectric properties of PTFE, the dielectric constant and loss tangent of 30 vol % hybrid composites are 3.23 and 0.012 at 1 MHz, respectively. Chen et al 32 chose alumina particles (AO) to overcome the anisotropy in thermal conductivity. The through-plane thermal conductivity of PTFE/HBN/AO composite filled with 30 vol % hybrid fillers can be increased to 1.544 W/(m•K) (5.5 times that of PTFE).…”

Section: ■ Introductionmentioning

confidence: 99%

Improved Through-Plane Thermal Conductivity and Mechanical Properties of Low-Dielectric FEP/HBN Composites by Adding PTFE Nanoparticles

Zhang

Yin

Yan

et al. 2021

ACS Appl. Electron. Mater.

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The development of polymer dielectric materials with low dielectric constant and dielectric loss, high-temperature resistance, and mechanical strength is of great significance to meet the requirements of high-performance, thermally conductive, and dielectric materials in the 5G field. In this study, we designed a mixing device, a push−pull mixer (PPM) based on the elongational deformation theory, to overcome problems encountered during the formation of polymer-based composites with a high content of thermally conductive fillers. Hexagonal boron nitride nanoparticles (nmHBN), HBN microparticles (μmHBN), and poly(tetrafluoroethylene) (PTFE) fillers were introduced into the fluorinated ethylene propylene (FEP) matrix to enhance the thermal conductivity of FEP. Fillers were dispersed uniformly in the matrix, and PTFE powders effectively disrupted the transverse orientation of HBN formed during compression, as confirmed by the results of scanning electron microscopy (SEM) and rheological behavior measurements. When the ratio of FEP/nmHBN/μmHBN/PTFE was 68:12:15:5, the in-plane and through-plane thermal conductivities of the composite were 1.61 and 0.43 W/(m•K), which were ∼16 times and 4 times that of the FEP matrix, respectively, and the tensile stress of the composite was 14.73 MPa, the same level as pure FEP. In addition, the dielectric constant and dielectric loss at 1 MHz of the FEP/nmHBN/μmHBN/PTFE composites maintained low levels of 2.6 and 0.014, respectively.

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Enhanced thermal conductivity and wear resistance of polytetrafluoroethylene via incorporating hexagonal boron nitride and alumina particles

Cited by 21 publications

References 43 publications

Physical, mechanical, and sliding wear behavior of micro‐sized Linz‐Donawintz slag filled epoxy composites

Physical, mechanical, and sliding wear behavior of micro‐sized Linz‐Donawintz slag filled epoxy composites

Polyvinylidene fluoride/polysulfone/air plasma defected hexagonal boron nitride emerging nano blends for electrostatic dissipation

Improved Through-Plane Thermal Conductivity and Mechanical Properties of Low-Dielectric FEP/HBN Composites by Adding PTFE Nanoparticles

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