WO2017105395A1 - Stabilization of hexagonal boron nitride nanoparticles - Google Patents

Stabilization of hexagonal boron nitride nanoparticles Download PDF

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Publication number
WO2017105395A1
WO2017105395A1 PCT/US2015/065605 US2015065605W WO2017105395A1 WO 2017105395 A1 WO2017105395 A1 WO 2017105395A1 US 2015065605 W US2015065605 W US 2015065605W WO 2017105395 A1 WO2017105395 A1 WO 2017105395A1
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WO
WIPO (PCT)
Prior art keywords
composition
vol
composition according
boron nitride
hexagonal boron
Prior art date
Application number
PCT/US2015/065605
Other languages
English (en)
French (fr)
Inventor
Serge Lievens
Vera Radojcic
Sandip Agarwal
Michael Fuerstman
Original Assignee
Arteco Nv
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to RU2017120795A priority Critical patent/RU2701831C2/ru
Priority to JP2017532597A priority patent/JP6654637B2/ja
Priority to EP15907985.4A priority patent/EP3221260B1/en
Priority to PCT/US2015/065605 priority patent/WO2017105395A1/en
Priority to CN201580067811.6A priority patent/CN107454893B/zh
Priority to ES15907985T priority patent/ES2856032T3/es
Application filed by Arteco Nv filed Critical Arteco Nv
Priority to MX2017007385A priority patent/MX2017007385A/es
Priority to AU2015414693A priority patent/AU2015414693B2/en
Priority to CA2967462A priority patent/CA2967462C/en
Priority to BR112017012738-5A priority patent/BR112017012738B1/pt
Publication of WO2017105395A1 publication Critical patent/WO2017105395A1/en
Priority to ZA2017/04459A priority patent/ZA201704459B/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/06—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
    • C01B21/064—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron with boron
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/08—Materials not undergoing a change of physical state when used
    • C09K5/10—Liquid materials
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer

Definitions

  • This disclosure relates to stabilized compositions which comprise hexagonal boron nitride nanoparticles.
  • Heat transfer fluids are used in many applications, particularly as coolants or antifreeze. Examples of use of heat transfer fluids include the removal or exchange of excess heat from stationary and automotive internal combustion engines, heat generated by electrical motors and generators, process heat and condensation heat (e.g., in refineries and steam generation plants), heat from electronic equipment, or heat generated in fuel cell systems. In each application, thermal conductivity and heat capacity of the heat transfer fluid is important.
  • water is often mixed with freezing point depressants (e.g., alcohols like glycols or salts) to obtain antifreeze properties.
  • freezing point depressants e.g., alcohols like glycols or salts
  • these mixtures have a decreased heat transfer capability, but are still preferred over liquids like organic oils, silicone oil, or synthetic esters.
  • Heat transfer fluids with higher thermal conductivities are desirable. Although water based and water/glycol based fluids dominate the market, they do not always give sufficient heat transfer performance. In particular, energy efficient applications and equipment require the development of heat transfer fluids with significantly higher thermal conductivities than are presently available. Fluids with suspended solids can exhibit higher thermal conductivities. Solids have greater thermal conductivities than fluids. For example, the solids copper, aluminum, copper oxide and silicon oxide have respectively thermal conductivities of 401 W/ m.K, 237 W/m.K, 76.5 W/m.K and 1.38 W/m.K, respectively.
  • Nanofluids containing only a small amount of nanoparticles, have substantially higher thermal conductivities compared to the same fluids without nanoparticles.
  • compositions containing hexagonal boron nitride nanoparticles Disclosed herein are stable compositions containing hexagonal boron nitride nanoparticles, methods of preparing the stabilized compositions, and methods of exchanging heat utilizing the compositions as heat transfer fluids.
  • a composition comprises a continuous phase selected from the group consisting of water, alcohol, and a mixture of water and alcohol; hexagonal boron nitride nanoparticles dispersed in the continuous phase; and a compound having a formula (I) or a salt thereof, wherein n is an integer between 50 and 200 and y is an integer between 20 and 200.
  • a composition comprises a continuous phase of water
  • n is an integer between 50 and 200 and y is an integer between 20 and 200.
  • a method of exchanging heat comprises a. generating heat in an automotive internal combustion engine; b. passing a stream through one side of a heat exchanger; c. passing a composition through another side of the heat exchanger; and d.
  • the composition comprises a continuous phase selected from the group consisting of water, alcohol, and a mixture of water and alcohol; hexagonal boron nitride nanoparticles dispersed in the continuous phase; and a compound having a formula (I)
  • n is an integer between 50 and 200 and y is an integer between 20 and 200.
  • a composition comprises a continuous phase selected from the group consisting of water, alcohol, and a mixture of water and alcohol; hexagonal boron nitride nanoparticles dispersed in the continuous phase; and a compound having a formula (I)
  • n is an integer between 50 and 200 and y is an integer between 20 and 200.
  • a composition comprises a continuous phase of water; hexagonal boron nitride nanoparticles dispersed in the continuous phase; and a compound having a formula (I)
  • n is an integer between 50 and 200 and y is an integer between 20 and
  • the compound having the formula (I) is a triblock copolymer having a central hydrophobic block of polypropylene glycol surrounded by hydrophilic blocks of polyethylene glycol.
  • the present inventors have observed that fluids containing hexagonal boron nitride nanoparticles exhibit increased thermal conductivity, but are not suitably stable at high
  • incorporation of the triblock copolymer having a central hydrophobic block of polypropylene glycol surrounded by hydrophilic blocks of polyethylene glycol into a water based, an alcohol based, or a water/alcohol based continuous phase containing dispersed hexagonal boron nitride nanoparticles can stabilize the dispersion of hexagonal boron nitride nanoparticles in the continuous phase at room temperature and at elevated temperatures.
  • incorporation of the triblock copolymer can provide a composition having not only substantial thermal conductivity, but also improved stability, making it suitable for use as a heat transfer fluid.
  • the composition can be stable for 12 hours at room temperature.
  • the composition can be stable for 12 hours at a temperature between about room temperature and about 85°C.
  • the composition can be stable for 12 hours at a temperature between about 70°C and about 110°C or between about 85° and about 110°C.
  • Suitable salts of the compound having the formula (I) include alkali metal, ammonium, and amine salts.
  • the composition generally contains a major amount (i.e., at least 80 vol%) of the continuous phase (i.e., water, alcohol, or a mixture water and alcohol). In one embodiment, the composition contains at least 85 vol% of the continuous phase. In another embodiment, the composition contains at least 90 vol% of the continuous phase. In a further embodiment, the composition contains at least 95 vol% of the continuous phase.
  • the continuous phase i.e., water, alcohol, or a mixture water and alcohol.
  • Alcohol acts as a freezing point depressant if antifreeze properties are desired.
  • the alcohol may be a glycol.
  • the glycol may be ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, triethylene glycol, tetraethylene glycol, pentaethylene glycol, hexaethylene glycol, dipropylene glycol, tripropylene glycol, tetrapropylene glycol, pentapropylene glycol, hexapropylene glycol, mono ethylene glycol, or mono propylene glycol.
  • the alcohol may alternatively be selected from methanol, ethanol, propanol, butanol, furfurol, tetrahydrofurfuryl, ethyoxylated furfuryl, dimethyl ether of glycerol, sorbitol, 1,2,6 hexanetriol, trimethylolpropane, methoxy ethanol, and glycerin.
  • methanol, ethanol, propanol, butanol, furfurol, tetrahydrofurfuryl, ethoxylated furfuryl ethylene glycol, diethylene glycol, triethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, dipropylene glycol, butylene glycol, glycerol, monoethylether of glycerol, dimethylether of glycerol, sorbitol, 1,2,6-hexanetriol, trimethylolpropane, methoxy ethanol, or mixtures thereof are utilized.
  • the continuous phase is a mixture of water and ethylene glycol. In another particular embodiment, the continuous phase is a mixture of water and ethylene glycol in a ratio of 50/50 vol%.
  • the hexagonal boron nitride nanoparticles are cylindrical in shape and their size can vary. Due to the cylindrical shape of the hexagonal boron nitride nanoparticles, their height in combination with their radius or diameter describes their size.
  • the hexagonal boron nitride nanoparticles can have an average diameter between about 50 nm and about 350 nm and an average height between about 5 nm and about 20 nm.
  • the hexagonal boron nitride nanoparticles can have an average sheet height between about 5 nm and about 20 nm and an average sheet radius between about 50 nm and about 350 nm.
  • the concentration of the hexagonal boron nitride nanoparticles in the composition can vary. In one embodiment, the hexagonal boron nitride nanoparticles are present in the composition in a concentration between about 0.0001 vol% and about 10 vol%. In another embodiment, the hexagonal boron nitride nanoparticles are present in the composition in a concentration between about 0.005 vol% and about 0.5 vol%. In yet another embodiment, the hexagonal boron nitride nanoparticles are present in the composition in a concentration between about 0.05 vol% and about 0.2 vol%.
  • n is an integer between 80 and 120 and y is an integer between 50 and 75. In a particular embodiment, n is 100 and y is 65.
  • the concentration of the compound having the formula (I) in the composition can vary. In one embodiment, the compound having the formula (I) is present in the composition in a concentration between about 0.0001 vol% and about 1 vol%. In another embodiment, the compound having the formula (I) is present in the composition in a concentration between about 0.2 vol% and about 0.7 vol%. In a particular embodiment, the compound having the formula (I) is present in the composition in a concentration of about 0.1 vol%.
  • Neither the thermal conductivity nor the thermal capacity of the composition is significantly impacted by the presence of a small amount of common additives.
  • Appropriate additives include an alkali metal salt as a freezing point depressant, a corrosion inhibitor, a scale inhibitor, a stabilizer, an antioxidant, a buffer, a de-foamer, a dye, or a mixture thereof.
  • the composition may contain one or more additives for a total additive amount of about 0.01 wt% to about 10 wt%.
  • one or more corrosion inhibitors may be present in the composition in a concentration between about 0.2 wt% and about 10 wt%.
  • alkali metal salts include a salt of an acid or mixture of acids selected from the group consisting of acetic acid, propionic acid, succinic acid, betaine and mixtures thereof.
  • corrosion inhibitors include an aliphatic carboxylic acid or a salt thereof, an aromatic carboxylic acid or a salt thereof, a triazole, a thiazole, a silicate, a nitrate, a nitrite, a borate, a phosphate molybdate, or an amine salt.
  • antioxidants include phenols, such as 2,6-di-t-butyl methylphenol and 4,4'-methyl-ene-bis(2,6-di-t-butylphenol); aromatic amines, such as p,p-dioctylphenylamine, monooctyldiphenylamine, phenothiazine, 3,7-ioctylphenothiazine, phenyl- 1-naphthylamine, phenyl-2-naphthylamine, alkylphenyl-l-naphthatalamines and alkyl-phenyl-2-naphthal-amines, as well as sulphur-containing compounds, e.g. dithiophosphates, phosphites, sulphides and dithiometal salts, such as benzothiazole, tin-dialkyldithiophosphates and zinc
  • the pH of the composition may be between about 7 and about 11.5. In one embodiment, the pH of the composition is between about 8.5 and about 10.5.
  • the composition can be prepared by dispersing the hexagonal boron nitride nanoparticles in the continuous phase (i.e., water, alcohol, or a mixture of water and alcohol).
  • the hexagonal boron nitride nanoparticles may be dispersed either prior to or after adding the compound having the formula (I) to the continuous phase. Any means known in the art for dispersion of the hexagonal boron nitride nanoparticles may be used. In one embodiment, the nanoparticles are dispersed by sonication.
  • the method of exchanging heat comprises passing a stream through one side of a heat exchanger; passing a composition as disclosed herein through another side of the heat exchanger; and transferring the heat from the stream to the composition in the heat exchanger.
  • the method further comprises generating the heat in an automotive internal combustion engine.
  • the method further comprises generating the heat in a stationary internal combustion engine.
  • the method further comprises generating the heat in an electrical motor or generator.
  • the method further comprises generating the heat by condensation or a chemical reaction, for example, in a refinery, a steam generation plant, or a fuel cell.
  • Nanofluids containing dispersed hexagonal boron nitride nanoparticles were prepared in Examples 5-8 and Comparative Examples 1-4 and 9-11. Micron-sized hexagonal boron nitride particles were added to isopropanol and sonicated for 1 hour. The hexagonal boron nitride particles were then centrifuged at 2000 RPM for 10 minutes. Non-exfoliated particles were separated at the bottom. Exfoliated hexagonal boron nitride nanoparticles in the isopropanol were filtered and dried. The hexagonal boron nitride nanoparticles were re-dispersed in an ethylene glycol/water solution (50/50 vol%) either with or without soni cation and either with or without the following triblock copolymer:
  • a nanofluid was prepared with 0.1 vol% hexagonal boron nitride nanoparticles in an ethylene glycol/water solution (50/50 vol%).
  • a nanofluid was prepared with 0.05 vol% hexagonal boron nitride nanoparticles in an ethylene glycol/water solution (50/50 vol%).
  • a nanofluid was prepared with 0.2 vol% hexagonal boron nitride nanoparticles in an ethylene glycol/water solution (50/50 vol%).
  • a nanofluid was prepared with 0.5 vol% hexagonal boron nitride nanoparticles in an ethylene glycol/water solution (50/50 vol%).
  • a nanofluid was prepared with 0.1 vol% hexagonal boron nitride nanoparticles and 0.1 vol% triblock copolymer in an ethylene glycol/water solution (50/50 vol%) by sonication.
  • Example 6
  • a nanofluid was prepared with 0.1 vol% hexagonal boron nitride nanoparticles and 0.2 vol% triblock copolymer in an ethylene glycol/water solution (50/50 vol%) by sonication.
  • a nanofluid was prepared with 0.05 vol% hexagonal boron nitride nanoparticles and 0.1 vol% triblock copolymer in an ethylene glycol/water solution (50/50 vol%) by sonicatrion.
  • a nanofluid was prepared with 0.2 vol% hexagonal boron nitride nanoparticles and 0.1 vol% triblock copolymer in an ethylene glycol/water solution (50/50 vol%) by sonication.
  • a nanofluid was prepared with 0.1 vol% hexagonal boron nitride nanoparticles in an ethylene glycol/water solution (50/50 vol%) by sonication.
  • a nanofluid was prepared with 0.2 vol% hexagonal boron nitride nanoparticles in an ethylene glycol/water solution (50/50 vol%) by sonication.
  • a nanofluid was prepared with 0.2 vol% hexagonal boron nitride nanoparticles in a Halvoline® XLC/water solution (50/50 vol%) by sonication.
  • the nanofluids were stored both at room temperature and at 85°C and their stabilities were observed visually after 12 hours at both temperatures.
  • the stabilities of the nanofluids are set forth in the table below.
  • stable means that no precipitate was observed.
  • not stable means that precipitate was observed in the container containing the nanofluid.
  • nanoparticles in the nanofluid of Example 8 at room temperature were not stable both at room temperature and 85°C.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
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PCT/US2015/065605 2014-12-15 2015-12-14 Stabilization of hexagonal boron nitride nanoparticles WO2017105395A1 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
JP2017532597A JP6654637B2 (ja) 2015-12-14 2015-12-14 六方晶窒化ホウ素ナノ粒子の安定化
EP15907985.4A EP3221260B1 (en) 2014-12-15 2015-12-14 Stabilization of hexagonal boron nitride nanoparticles
PCT/US2015/065605 WO2017105395A1 (en) 2015-12-14 2015-12-14 Stabilization of hexagonal boron nitride nanoparticles
CN201580067811.6A CN107454893B (zh) 2015-12-14 2015-12-14 稳定化的六方氮化硼纳米颗粒
ES15907985T ES2856032T3 (es) 2014-12-15 2015-12-14 Estabilización de nanopartículas de nitruro de boro hexagonal
RU2017120795A RU2701831C2 (ru) 2014-12-15 2015-12-14 Стабилизация гексагональных наночастиц нитрида бора
MX2017007385A MX2017007385A (es) 2015-12-14 2015-12-14 Estabilizacion de nanoparticulas hexagonales de nitruro de boro.
AU2015414693A AU2015414693B2 (en) 2014-12-15 2015-12-14 Stabilization of hexagonal boron nitride nanoparticles
CA2967462A CA2967462C (en) 2014-12-15 2015-12-14 Stabilization of hexagonal boron nitride nanoparticles
BR112017012738-5A BR112017012738B1 (pt) 2014-12-15 2015-12-14 Estabilização de nanopartículas de nitreto de boro hexagonal
ZA2017/04459A ZA201704459B (en) 2014-12-15 2017-06-30 Stabilization of hexagonal boron nitride nanoparticles

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Cited By (2)

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ES2828693A1 (es) * 2019-11-27 2021-05-27 Compania Pineda Alvarez S L Fluido de transferencia térmica de composición basada en el uso de agua
CN117511514A (zh) * 2024-01-04 2024-02-06 西南石油大学 一种阻燃型聚乙烯醇气凝胶相变材料及其制备方法

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ES2828693A1 (es) * 2019-11-27 2021-05-27 Compania Pineda Alvarez S L Fluido de transferencia térmica de composición basada en el uso de agua
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CN117511514A (zh) * 2024-01-04 2024-02-06 西南石油大学 一种阻燃型聚乙烯醇气凝胶相变材料及其制备方法
CN117511514B (zh) * 2024-01-04 2024-04-30 西南石油大学 一种阻燃型聚乙烯醇气凝胶相变材料及其制备方法

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AU2015414693A1 (en) 2017-06-29
MX2017007385A (es) 2019-08-08
JP2019505599A (ja) 2019-02-28
CN107454893B (zh) 2021-08-06
AU2015414693B2 (en) 2019-06-20
CN107454893A (zh) 2017-12-08

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