Nano Hexagonal Boron Research Articles

Investigation of mechanical properties of nano hexagonal boron nitride integrated epoxy adhesives in bonded GFRP and CFRP composite joints

In this study, two kinds of fiber reinforced thermoset composites (glass and carbon fiber) were fabricated with almost same volume fraction and thickness and bonded with epoxy adhesives (ADs) with various weight contents of nano hexagonal boron nitride (nano-h-BN) (0, 1, 2 and 3 wt%). The single-lap shear (SLS) tests were conducted on bonded joints with ADs. The effects of nano-h-BN contents on the morphology and micro-structure of the epoxy ADs were studied by scanning electron microscope (SEM). The specimens with the glass fiber reinforced composites with 2-wt% nano-h-BN showed the highest results of SLS strength characteristics with an improvement of 23.6 % and 37.2 % in the SLS strength compared to the specimens with the glass fiber and without nano-h-BN in 0° and 90° directions. Furthermore, the specimens with the carbon fiber reinforced composites with 2-wt% nano-h-BN showed an improvement of 191.7 % and 78.3 % in the SLS strength compared to the specimens with the carbon fiber and without nano-h-BN in 0° and 90° directions.

Insight into the tribological properties of cylinder liner-piston ring under the nano BNNs/Cu composite additive lubrication

To improve the tribological properties of the cylinder liner-piston ring, a two-dimensional hexagonal boron nitride/copper composite lubricant additive was prepared and characterized in detail. The tribological properties and lubrication mechanism of nano hexagonal boron nitride composites with different concentrations were studied through the reciprocating friction test on the Rtec friction and wear tester. The results show that copper is successfully reduced and attached to the surface of h-BN nanosheets through the self-polymerization of dopamine, and the spherical structure promotes the interlayer slip of the nanosheets during the reciprocating friction process. The appropriate concentration of nano composite additives has excellent anti-friction and anti-wear properties. At 1 Hz and 100 N, the friction coefficient and wear quality of the nano composite additive with a concentration of 2 wt% were reduced by 29.07% and 76%, respectively. The surface Sq value and Sz value of the cylinder liner sample decreased by 68.06% and 74.47%. At the same time, under the condition of high speed and heavy load, the average wear depth of the cylinder liner sample is reduced by 61.3%. The nano composite material additive forms an excellent friction protective film on the wear surface of the cylinder liner, which can better enter the wear surface of the cylinder liner and produce a filling and repairing effect. The research results provide a method for the use of nano hexagonal boron nitride composite additives to inhibit the wear of cylinder liner-piston ring of Marine diesel engines.

Synergistic effect of positive temperature coefficient and thermally conductive micro‐nano fillers on electrical and thermal properties of epoxy resin

AbstractThis study investigates the effect of positive temperature coefficient (PTC) fillers, i.e., barium strontium titanate (BST‐60) and nano hexagonal boron nitride (h‐BN) fillers, on thermal and dielectric insulation properties of epoxy (EP). The electrical resistivity, DC breakdown strength, space charge, thermal conductivity, thermogravimetric analysis, and glass transition temperature (Tg) of EP composites were measured. Results indicate that, below curie temperature, the EP composites containing 0.5 and 1 wt% of BST and 5 wt% of h‐BN have superior electrical resistivity, breakdown strength, and thermal conductivity. However, above curie temperature, the EP composites containing 2 and 2.5 wt% of BST and 5 wt% of h‐BN have superior insulation properties than the pure EP and other composites. While the thermal properties of EP improve with an increase in h‐BN loading to 10 wt%, its dielectric properties are slightly compromised due to the presence of tiny defects in the composite material. It is hypothesized that the BST‐60 suppresses the negative temperature coefficient effect (NTC) of EP by regulating the electrical resistivity above the curie point, whereas nano h‐BN enhances the thermal conductivity of EP by constructing a heat dissipation path. The proposed mechanism for charge dynamics along with heat conduction‐dissipation explains the fillers' behavior at different temperatures.Highlights Analysis of epoxy composites with polydopamine‐modified BST and h‐BN fillers. PTC fillers are used to mitigate the negative temperature effect of epoxy. Optimal fillers wt% improves dielectric and thermal properties. This study shows that optimized epoxy composites can be used for packaging.

Enhanced interfacial and mechanical properties of carbon fabric/PA12 composites via grafting silanized nano hexagonal boron nitride onto the fibers

ABSTRACT The purpose of this work was to create thermoplastic composites based on carbon fiber fabric reinforced enhanced mechanical and interfacial properties, based on PA12 (polyamide 12). In line with these objectives, it is aimed to develop carbon fiber reinforced thermoplastic composite materials with improved interfaces by sizing chemical modification and interfacial compatibility suspension development using hBN (hexagonal boron nitride) nanomaterial. The production of bare and silanized hBN sizing grafted CF (carbon fiber)-PA12 plates was followed by various mechanical, thermal, and SEM analyses. When the mechanical test results of CF-PA12 and hBN-APTES (3-Aminopropyltriethoxysilane) Sizing Coated Composite Specimens are compared; it is proved that hBN-APTES sizing improves the mechanical properties. Furthermore, sizing coated CF-PA12 composite specimens showed improvements in flexural strength of 20.67% and compressive strength of 19%, respectively. The significance of these results is to enhance the critical interfacial properties in the manufacturing of carbon fiber composite materials based on PA12, and to produce high-quality products that can be used in a variety of industries, including sports equipment, automotive, and aerospace, all of which have a constant demand worldwide.

Enhancement of mechanical properties of oil well cement by nano-SiO2/h-BN

In this study, high-strength oil-well cement with hybrid nanosilica (NS) and nanohexagonal boron nitride (h-BN) additives was prepared to reduce effectively the environmental pollution caused by fluid leakage from oil wells owing to weakened cementing rings and extend the lifetimes of oil wells. It was confirmed that NS/h-BN can enhanced the mechanical strength of oil-well cement at 7 and 28 days. The effects of NS and h-BN on the mechanical properties of oil-well cement at 7 days (d) and 28 d were investigated by varying the nanomaterial content to determine the weight percentages of the nanomaterials that optimized the mechanical properties. The experimental results showed that the ideal ratio content of nanomaterials was 2.5 wt% NS and 0.5 wt% h-BN, and the minimum porosity measured by a low-field nuclear magnetic resonance test was 16.48%, which was 50.24% lower than that of the blank group. After 28 d of curing, the compressive, flexural, and splitting tensile strengths were 12.15 MPa/25.99%, 3.75 MPa/42.86%, and 1.39 MPa/41.25% higher than those of the blank group. The mechanical strength of the oil-well cement increased with the NS content, whereas with the increase in h-BN content, sequential rising and falling tendencies were observed. The microstructure, pore structure, and hybridization modification mechanism of the NS/h-BN oil-well cement were analyzed using X-ray diffraction, thermogravimetric analysis, and scanning electron microscopy. This high-mechanical strength and low-porosity hybrid nanomaterial oil-well cement system can provide an experimental basis for the application of novel high-strength cement types in oil fields.

Influence of nano hexagonal boron nitride on the wear properties of aluminium alloy

ABSTRACT Spark plasma sintered, AA7050 reinforced with nano hexagonal boron nitride (n-h-BN) particles followed by characterisation research was carried out to determine the impact of h-BN in the aluminium matrix. With the aid of field-emission scanning electron microscopy , the uniform dispersion of hexagonal boron nitride was examined, and the impact of altering h-BN concentration on the mechanical and tribological properties was studied. In order to achieve individual dispersion of h-BN particles at low milling time without causing any structural damage, pre-mixing of powders prior to high-energy ball milling proved beneficial. Using the X-ray diffraction method, structural and phase analysis was performed on the powders as well as sintered samples. Pin-on disc apparatus is used for testing the weight loss of the composites. SEM was used to examine the worn surfaces of the substrate. According to the wear analysis, adding reinforcement with 0.5 wt% h-BN resulted in a 65% reduction in wear rate and a 33% increase in hardness. It has been found that h-BN tends to aggregate in composite powder above 0.5 wt%, reducing its physical and mechanical qualities.

Insight on the corrosion inhibition of nanocomposite chitosan/boron nitride integrated epoxy coating system against mild steel

Research in the field of organic and inorganic corrosion inhibitors has become prominent in recent years whereas its applicability is limited owing to the toxicity, non-biodegradability, low inhibition efficiency, etc. Polymer nanocomposites have high mechanical strength, stiffness, toughness, and thermal stability. They act as barriers against moisture and gases which enhance their applicability to various fields. The present study focuses on the synthesis of nanocomposite of chitosan/boron nitride (CS-BN) by sol-gel process and incorporated into epoxy matrix. The composite is then characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). XRD results show that nano hexagonal boron nitrides are finely scattered in the chitosan matrix. The thermal stability of the CS-BN composite was studied with TGA. The study depicts that boron nitride increases the thermal stability of chitosan. The corrosion protection features of biocompatible chitosan/boron nitride nanocomposite on mild steel (MS) substrate in 1 mol/L HCl solution were monitored by potentiodynamic polarization studies (Tafel), electrochemical impedance spectroscopy (EIS), and linear polarization studies (LPS). X-ray photoelectron spectroscopy (XPS) analysis was adopted to propose the mechanism of corrosion and also used to compare the corrosion inhibition behavior of BN in composite on MS surface.

A new type of nano APTES-hBN modified palm oil as natural ester insulating oil with upgraded thermal aging characteristics

In this paper, nano hexagonal boron nitride grafted with silane coupling agent (APTES-hBN) is selected to modify the natural ester, conducts thermal aging tests on the modified natural ester insulating oil and explores the mechanism of the nanoparticles on the improvement of natural ester properties from a microscopic perspective combining with molecular dynamics. The experimental results show that the addition of Nano APTES-hBN inhibited the production of acids in oil-paper insulating, leading to a corresponding decrease in the number of polar molecules in the oil. Compared with crude oil, the acid value and dielectric loss factor in the modified oil are reduced by 8.4% and 43.8%, respectively at the end of aging, and the rate of increase is smaller. Through its mechanism study, it is found that the addition of Nano APTES-hBN results in a tighter interfacial bonding between oil and paper insulation, and the adsorption energy of modified natural ester insulating oil to H3O+ is greater. The addition of Nano APTES-hBN introduced a large number of electron traps, providing a medium for the transition of valence electrons. At the same time, there are hydroxyl groups with strong electrostatic potential on Nano APTES-hBN, which have strong adsorption effect on charged particles. In addition, the Nano APTES-hBN is able to form hydrogen bonds with acids, which slows down the promotion of hydrolysis of ester molecules by acids, and thus improves the thermal stability of the modified natural ester insulating oil.

Rheological properties and early mechanical strength of oil-well cement modified by hybrid nano-silica and nano-hexagonal boron nitride

The purpose of this study was to investigate the effect of the content of hybrid nano-silica (NS) and nano-hexagonal boron nitride (h-BN) on the rheological properties and early mechanical strength of oil-well cement using response surface methodology (RSM). Based on the microstructures revealed by X-ray diffraction, thermogravimetric analysis, and scanning electron microscopy, the modification mechanism of cement mixed with a hybrid of NS and h-BN in the early stage of hydration was studied. It was found that the rheological properties of fresh oil-well cement slurries with added NS and h-BN conformed to those of Bingham fluids. An increase in NS content worsened the fluidity of the cement, whereas the h-BN content did not affect its fluidity. The early compressive, flexural, and splitting tensile strengths at the end of the 3-day curing time increased by 12.33 MPa/47.24 %, 1.88 MPa/29.01 % and 1.24 MPa/53.22 %, respectively. The pozzolanic reaction of NS begins to occur in the early stages of cement hydration. The synergistic effect of the added NS and h-BN increased the density of the early hydration product of the cement. The h-BN mainly enabled the bridging, filling, and crack-resistant effects in the early oil-well cement.

Enhanced catalytic behavior of h-BN supported CuNi bimetallic catalysts in hydrolytic dehydrogenation of NH3BH3

The hydrolysis of ammonia borane (NH3BH3, AB) is an efficient strategy for high-purify hydrogen evolution. However, it is indispensable to develop a suitable catalyst because this reaction is kinetically infeasible at room temperature. In this work, we prepared a series of nano hexagonal boron nitride (h-BN) supported CuNi bimetallic catalysts through a facile adsorption-chemical reduction procedure. The effects of various molar ratios of Cu to Ni and CuNi loadings on AB hydrolysis were investigated in details. Benefitting from the proper porous structure, the interesting alloy effect of Cu and Ni, as well as the synergistic effect between h-BN and CuNi, 20 wt% Cu0.5Ni0.5/h-BN displays the highest catalytic activity among the as-prepared catalysts. Apart from satisfactory durability, the corresponding hydrogen generation rate, turnover frequency at 303 K in base solution and apparent activation energy are 2437.0 mL g−1 min−1, 6.33 min−1 and 23.02 kJ mol−1, respectively, which are very outstanding compared with many previous results. Our work not only provides a proper non-precious metal catalyst for hydrogen generation from the hydrolysis of chemical hydrogen storage materials but also offers a facile strategy for synthesizing metallic functional materials.

Study of Nano h-BN Impact on Lubricating Properties of Selected Oil Mixtures.

Our experiments aimed to study the influence of layered materials with nanometric-scale particles, which are part of lubricant oils, on their tribological properties. The object of this study was a lubricant oil made using base oil PAO4, which contained nanoparticle hexagonal boron nitride (nano h-BN) and a dispersant based on succinic acid imide. Comparative tests for engine oil (CB30) were also performed. The paper presents the method of preparing the test material and the tribological test results, including wear spot diameter (wear mark), limit wear load, and seizure load. The test results obtained demonstrate that nano-hexagonal boron nitride improves the tribological properties of lubricant oils. However, oil preparation and the quantitative selection of components markedly influence the results.

Improving thermal energy storage and transfer performance in solar energy storage: Nanocomposite synthesized by dispersing nano boron nitride in solar salt

Solar salt (SS) is an energy storage material widely used in concentrating solar power (CSP) stations at industrial thermal energy storage (TES) systems in the current. Hence, a conventional high-temperature static melting method was used to prepare nano hexagonal boron nitride-SS (h-BN-SS, BS system) composite materials with different content of nano BN to improve the heat storage and transfer performance of SS. The specific heat (cp) of 1.81 J·g−1·K−1 was obtained at nano BN content of 0.8 wt% (sample BS6), which had increase of 16.03% compared with pure SS (sample BS0). The crystal planes (104) and (221) of nitrate appeared on the surface of nano BN (100), promoted the enhancement of surface energy of whole system. The using temperature zone was widened and thermal conductivity (λ) had been increased by 18.52%. The existence forms of nano BN hadn't changed at high temperature, and the cation environment around NO3− of BS0 and BS6 were changed after adding nano BN demonstrated by high temperature Raman spectroscopy. Moreover, BS6 had excellent thermal stability at long-term thermal stability measurement within 7200 min. The observations suggested that nano BN may serve as promising additive for solar energy storage material toward TES system applications.

Improvements of the structural, thermal, and mechanical properties of structural adhesive with functionalized boron nitride nanoparticles

AbstractInvestigations on the production and development of nanoparticle‐reinforced polymer materials have been attracted attention by researchers. Various nanoparticles have been used to improve the mechanical, chemical, thermal, and physical properties of polymer matrix composites. Boron compounds come to the fore to improve the mechanical and thermal properties of polymers. In this study, mechanical, thermal, and structural properties of structural adhesive have been examined by adding nano hexagonal boron nitride (h‐BN) to epoxy matrix at different percentages (0.5, 1, 2, 3, 4, and 5%). For this purpose, nano h‐BN particles were functionalized with 3‐aminopropyltriethoxysilane (APTES) to disperse the h‐BN nanoparticles homogeneously in epoxy matrix and to form a strong bond at the matrix interface. Two‐component structural epoxy adhesive was modified by using functionalized h‐BN nanoparticles. The structural and thermal properties of the modified adhesives were investigated by scanning electron microscopy and energy dispersion X‐ray spectroscopy, Fourier transform infrared spectroscopy, differential scanning calorimetry, and thermogravimetric analysis techniques. Tensile test and dynamic mechanical analysis were performed to determine the mechanical properties of the adhesives. When the results obtained from analysis were examined, it was seen that the nano h‐BN particles functionalized with APTES were homogeneously dispersed in the epoxy matrix and formed a strong bond. In addition that, it was concluded from the experimental results that the thermal and mechanical properties of adhesives were improved by adding functionalized nano h‐BN particles into epoxy at different ratios.

Short time reaction synthesis of nano-hexagonal boron nitride

Nano-hexagonal boron nitride (h-BN) was successfully prepared via rapid microwave-assisted synthesis using boric acid (H3BO3) and melamine (C3H6N6) as raw materials. An investigation of the effect of the microwave energy on the synthesis process of nano h-BN was carried out. In addition, the preparation method of the precursor was also studied. Here, mixtures at different H3BO3:C3H6N6 ratios (1:1 and 2:1 M) were prepared via wet and dryforms. Each precursor was heated under microwave energy for different reaction times. The microwave-synthesized nano-products were characterized by XRD, SEM, EDS, HRTEM and SAED. The results show that the reaction time and temperature that are typically 4.6 h (ramp time + soak time) and 1400–2100 °C, respectively (literature values), can be dramatically reduced to only 1.5 h (ramp time + soak time) and 1130–1210 °C, respectively, applying microwave heating. It was observed that the final product consists of crystalline h-BN nanoparticles of about 20 nm and disc-like morphology.

Production, thermal and dielectrical properties of Ag-doped nano-strontium apatite and nano h-BN filled poly(4-(3-(2,3,4-trimethoxyphenyl) acryloyl) phenyl acrylate) composites

In present study, 4-(3-(2,3,4-trimethoxyphenyl) acryloyl) phenyl acrylate (AC-TMC) monomer was synthesized from the reaction of trimethoxy-substituted hydroxy chalcone and acryloyl chloride in the presence of triethylamine. The polymerization of AC-TMC was carried out by the free radical polymerization method at 60 °C. Monomer and polymer structures were confirmed by FT-IR, 1H-NMR, 13C-NMR spectroscopy techniques. Polymer composites were filled successfully with Ag doped nano-strontium apatite (Sr-Ag) and nano hexagonal boron nitride (h-BN). Characterization of polymer composites was accomplished using FT-IR, XRD and SEM techniques. Thermal analyzes of polymer and polymer composites were performed in nitrogen atmosphere using thermogravimetry (TGA) and differential scanning calorimetry analysis (DSC) techniques. The dielectric properties of composites were investigated by impedance analyzer in a range of 1 kHz-1 MHz frequency at room temperature. The results showed that with the increasing content of h-BN particles, the glass-transition temperature (Tg) of composites was increased obviously. Moreover, the added h-BN fillers increased the thermal stability of polymer significantly. The dielectric properties of polymer composite were enhanced by adding both Sr-Ag and h-BN fillers. The produced polymer composites can find applications in orthopedic, dental implants and medical field as biomaterial.

PREPARATION ENVIRONMENTALLY FRIENDLY NANO HEXAGONAL BORON NITRIDE (H-BN) ADDED CUTTING FLUID AND INVESTIGATION OF THE EFFECT ON CUTTING PERFORMANCE IN MILLING PROCESS OF HARD TO CUT MATERIALS.

In machining processes, MQL method is substantially preferred in terms of sustainable production because of lower usage of cutting fluid and better cutting performance in comparison with traditional techniques. On the other hand, it is also critical that the cutting fluid used is not hazardous to human and environmental health. In the present study, we aimed to investigate the cutting performance of AISI O2 steel in the presence of the cutting fluid containing various amounts of environmentally friendly Nano hexagonal boron nitride (Nano h-BN) based ethylene glycol (EG) by minimum quantity lubrication (MQL) method. Nano h-BN at 1% and 2% percentage by volume was added to the ethylene glycol and sonication was carried out for one hour for both prepared cutting fluids. Based on the experimental results using prepared cutting fluids, the highest cutting tool life was obtained in tests using 2% h-BN containing cutting fluid with 2.4 m cutting length. The improvement in tool life was approximately 46% using 2% h-BN containing cutting fluid compared to using 1% h-BN containing cutting fluid in milling tests. 2% h-BN containing cutting fluid compared to dry conditions in terms of tool life, the increase was approximately 78%. The improvement in surface roughness value measured on milled surface of workpiece material was approximately 60% using 2% h-BN containing cutting fluid compared to dry conditions. Compared to using 1% h-BN containing cutting fluid the improvement in surface roughness values was approximately 46%. A reduction in the cutting forces measured by the increased h-BN ratio in the prepared ethylene glycol based cutting fluid has occurred. As a result of SEM images and EDS analysis of worn tools, it was observed that the dominant wear mechanism was abrasion in all applied tests.

Investigation of machinability characteristics and comparative analysis under different machining conditions for sustainable manufacturing

The study is focussed on the comparative performance of input-parameters on cutting force, roughness, tool wear, and chip morphology of sustainable conditions (dry and MQL: Minimum quantity lubrication) on Nimonic 90 alloy. 0.25 wt% of nano hexagonal boron nitride (hBN) mixed with groundnut oil is used as nanofluids, and experimentations are accomplished on Taguchi’s L16 orthogonal array. Results show that in nano-MQL, the improvement of 1.654 and 1.276 times, 4.522, and 2.196 times that dry with two coated carbide insert for force and roughness. Coating loss occurred under the nano-MQL mode, whereas abrasion, notching observed in dry machining. The chip thickness ratio were1.34 times and 1.77 times, the shear angle was 1.22 times and 1.61 times, and reduced coefficient of friction under nano-MQL compared to dry. Nano-MQL with chemical vapour deposition (CVD) carbide insert is suitable for machining of alloy 90 with improved performance characteristics that of other machining conditions.

Investigation of the mechanical properties of Ni-B/hBN composite coatings electrodeposited in presence of CTAB as the surfactant

The effect of hexadecyltrimethylammonium bromide (CTAB) concentration on the galvanostatic electrodeposition of Ni-B matrix nano hexagonal boron nitride (hBN) reinforced composite coatings was investigated. XRD and FE-SEM analyzes were used for crystallographical and morphological investigations, respectively. Vickers indentation, nanoindentation, and nanoscratch experiments were carried out to investigate the micromechanical, nanomechanical and tribological properties, respectively. Potentiodynamic polarization and electrochemical impedance spectroscopy techniques were applied for corrosion characterization. The investigated properties have been improved with the increasing CTAB concentrations up to 900 μM. In a general manner, CTAB has a beneficial effect at lower concentrations and can be useful for metal matrix nano ceramic reinforced composite coating electrodeposition in the lower concentration range.

The heat transfer enhancement of concurrent flow and counter current flow concentric tube heat exchangers by using hexagonal boron nitride/water nanofluid

Heat exchangers are used in many applications including chemical, oil, and gas power generation, refrigeration, pharmaceuticals, and food processing. Because of their widespread usage, they have various types to serve at different working conditions. Increasing the performance of heat exchangers has become a very interesting field of study since the efficiency of various industrial and domestic systems depend on them. In this study, a coaxial double tube experimental set-up was prepared, and the effect of using nanohexagonal boron nitride nanofluid as hot working fluid on the heat transfer performance increase was investigated. The experiments were carried out in concurrent flow and counter flow conditions for various hot fluid-flow rates to obtain the heat transfer coefficients. Nanohexagonal boron nitride obtained in powder form was used to prepare the nanofluid by a two-step method. The 4 kg nanofluid containing 2% nanohexagonal boron nitride with 0.5% Triton X-100 as a surfactant in terms of mass ratio was prepared for the experiments. Heat transfer experiments were carried out three times by using the prepared nanohexagonal boron nitride/water nanofluid and pure water as hot fluid to reach more precise results. In the result of this study, the total heat transfer coefficient showed an average improvement of 48.78% for the concurrent flow heat exchanger, while an average improvement of 0.36% was observed in the counter flow conditions compared to the base fluid. This study shows the potential of application of nanohexagonal boron nitride/water nanofluid in heat management applications.

Tribological performance of peek with green lubricant enhanced by nano hexagonal boron nitride powder

Purpose The purpose of this paper is to investigate applicability of hexagonal boron nitride (h-BN) powder as a solid lubricant additive in coconut oil and to determine the tribological behavior of PEEK rubbed with DIN2080 tool steel, under prepared green lubricating condition. Design/methodology/approach In this study, tiribological performance of PEEK against the DIN2080 tool steel is investigated with green lubricant. Coconut oil was used as green lubricant and 4 per cent wt. h-BN powder was added as lubricant additive into the coconut oil. Reciprocal pin-plate tribological test were applied under dry, coconut oil and coconut oil+h-BN lubrication condition. Friction coefficients were recorded and wear behavior of the samples investigated by mass loss measurement and topographical inspection of wear track by optical profilometer. Findings Using coconut oil as lubricant provided 80 per cent reduction of friction coefficient and 33.4 per cent reduction of wear rate. Addition of h-BN into the coconut oil provide 84 per cent reduction of friction coefficient and 56 per cent reduction of wear rate. The results showed that vegetable oil is promising lubricant for sustainable manufacturing. h-BN serves to increase lubricant performance and decrease wear of the surfaces. Practical implications Petrochemical lubricants are one of the major sources of environmental pollution and health hazards. Development and use of environmental and health friendly lubricants support sustainability and reduce wear, friction and energy consumption. With this consciousness, recent studies have focused on green tribology and green lubricants such as vegetable oils, ionic liquid bio-lubricants and bio-based polymers. Originality/value In literature study coconut oil was proposed as green lubricant while h-BN powder was proposed as solid lubricant. However, applicability of h-BN powder in coconut oil has not been explored yet. Moreover, wear and friction property of PEEK material with DIN 2080 tool steel pair surface has not been studied yet with green lubricants.