JP6708680B2 - 超撥水表面が実現された伝熱管の製造方法 - Google Patents
超撥水表面が実現された伝熱管の製造方法 Download PDFInfo
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- JP6708680B2 JP6708680B2 JP2018042378A JP2018042378A JP6708680B2 JP 6708680 B2 JP6708680 B2 JP 6708680B2 JP 2018042378 A JP2018042378 A JP 2018042378A JP 2018042378 A JP2018042378 A JP 2018042378A JP 6708680 B2 JP6708680 B2 JP 6708680B2
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- 238000012546 transfer Methods 0.000 title claims description 274
- 238000004519 manufacturing process Methods 0.000 title claims description 111
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 105
- 239000005871 repellent Substances 0.000 title claims description 81
- 238000000034 method Methods 0.000 title claims description 27
- 230000002940 repellent Effects 0.000 title description 33
- 239000002086 nanomaterial Substances 0.000 claims description 109
- 239000007788 liquid Substances 0.000 claims description 72
- 238000007654 immersion Methods 0.000 claims description 54
- 239000011248 coating agent Substances 0.000 claims description 52
- 238000000576 coating method Methods 0.000 claims description 52
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 45
- 229910000077 silane Inorganic materials 0.000 claims description 40
- 239000011247 coating layer Substances 0.000 claims description 29
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 28
- 230000003075 superhydrophobic effect Effects 0.000 claims description 21
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 16
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 16
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 16
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 16
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical group CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 15
- 239000002904 solvent Substances 0.000 claims description 14
- 229910044991 metal oxide Inorganic materials 0.000 claims description 12
- 150000004706 metal oxides Chemical class 0.000 claims description 12
- -1 silane compound Chemical class 0.000 claims description 12
- LIKFHECYJZWXFJ-UHFFFAOYSA-N dimethyldichlorosilane Chemical compound C[Si](C)(Cl)Cl LIKFHECYJZWXFJ-UHFFFAOYSA-N 0.000 claims description 11
- 239000003929 acidic solution Substances 0.000 claims description 10
- 239000003960 organic solvent Substances 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 9
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 9
- 150000001875 compounds Chemical class 0.000 claims description 8
- ZDHXKXAHOVTTAH-UHFFFAOYSA-N trichlorosilane Chemical compound Cl[SiH](Cl)Cl ZDHXKXAHOVTTAH-UHFFFAOYSA-N 0.000 claims description 8
- 239000005052 trichlorosilane Substances 0.000 claims description 8
- 238000009210 therapy by ultrasound Methods 0.000 claims description 7
- 239000000470 constituent Substances 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- PISDRBMXQBSCIP-UHFFFAOYSA-N trichloro(3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl)silane Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)CC[Si](Cl)(Cl)Cl PISDRBMXQBSCIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910052725 zinc Inorganic materials 0.000 claims description 4
- 239000007983 Tris buffer Substances 0.000 claims description 2
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 claims description 2
- 238000009833 condensation Methods 0.000 description 34
- 230000005494 condensation Effects 0.000 description 34
- 230000000052 comparative effect Effects 0.000 description 33
- 230000015572 biosynthetic process Effects 0.000 description 26
- 239000000243 solution Substances 0.000 description 24
- 239000010410 layer Substances 0.000 description 19
- 238000007598 dipping method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000000498 cooling water Substances 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 5
- 229910021641 deionized water Inorganic materials 0.000 description 5
- 238000000527 sonication Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 239000013535 sea water Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000002071 nanotube Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- IXCSERBJSXMMFS-UHFFFAOYSA-N hcl hcl Chemical compound Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- RCHUVCPBWWSUMC-UHFFFAOYSA-N trichloro(octyl)silane Chemical compound CCCCCCCC[Si](Cl)(Cl)Cl RCHUVCPBWWSUMC-UHFFFAOYSA-N 0.000 description 2
- 229910052770 Uranium Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229920003180 amino resin Polymers 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000009193 crawling Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical group 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 150000004756 silanes Chemical class 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- DNYWZCXLKNTFFI-UHFFFAOYSA-N uranium Chemical compound [U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U] DNYWZCXLKNTFFI-UHFFFAOYSA-N 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
- F28F19/06—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings of metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/18—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
- F28F13/185—Heat-exchange surfaces provided with microstructures or with porous coatings
- F28F13/187—Heat-exchange surfaces provided with microstructures or with porous coatings especially adapted for evaporator surfaces or condenser surfaces, e.g. with nucleation sites
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- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
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- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1656—Antifouling paints; Underwater paints characterised by the film-forming substance
- C09D5/1662—Synthetic film-forming substance
- C09D5/1675—Polyorganosiloxane-containing compositions
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
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- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
- F22B37/107—Protection of water tubes
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- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
- F28F19/04—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings of rubber; of plastics material; of varnish
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2254/00—Tubes
- B05D2254/02—Applying the material on the exterior of the tube
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
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- B05D2506/00—Halogenated polymers
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- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
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- B05D2518/00—Other type of polymers
- B05D2518/10—Silicon-containing polymers
- B05D2518/12—Ceramic precursors (polysiloxanes, polysilazanes)
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- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/02—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using water or other liquid as the cooling medium
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- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0061—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for phase-change applications
- F28D2021/0063—Condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2245/00—Coatings; Surface treatments
- F28F2245/04—Coatings; Surface treatments hydrophobic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
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- F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
- F28F2255/20—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes with nanostructures
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Description
準備された伝熱管をアセトン(CH3COCH3)に入れて3〜7分間超音波処理して後、エタノール(C2H5OH)に入れて3〜7分間超音波処理した。超音波処理の後、脱イオン水(DI water)を用いて洗浄し、窒素ガスを用いて表面に残留する水気を除去した。金属酸化物を除去するために、2Mの塩酸(HCl)溶液に20〜40秒間浸漬させた。塩酸溶液に浸漬させた後、脱イオン水を用いて洗浄し、窒素ガスを用いて表面に残留する水気を除去した。
ナノ構造物を形成するために、脱イオン水100重量部を基準として、3.75重量部のNaClO2、5重量部のNaOH、および10重量部のNa3PO4を混合することでナノ構造物形成用浸漬液を製造し、前記ナノ構造物形成用浸漬液を沸騰させた。洗浄された伝熱管を、沸騰させたナノ構造物形成用浸漬液に10分間浸漬した後、脱イオン水を用いて洗浄し、窒素ガスを用いて表面に残留する水気を除去した。
ナノ構造物形成用浸漬液のNaClO2を1.5重量部入れたことを除き、製造例1と同様に製造した。
ナノ構造物形成用浸漬液のNaOHを4重量部入れたことを除き、製造例1と同様に製造した。
ナノ構造物形成用浸漬液のNa3PO4を6重量部入れたことを除き、製造例1と同様に製造した。
伝熱管をナノ構造物形成用浸漬液に20分間浸漬させたことを除き、製造例1と同様に製造した。
本願によれば、以下の各項目もまた開示される。
[項目1]
1)伝熱管を有機溶媒を用いて超音波処理するステップと、
2)上記1)ステップの超音波処理した伝熱管を洗浄するステップと、
3)上記2)ステップの洗浄した伝熱管を酸性溶液に浸漬して、伝熱管表面の金属酸化物を除去するステップと、
4)ナノ構造物形成用浸漬液を製造するステップと、
5)上記3)ステップの金属酸化物を除去した伝熱管を、上記4)ステップのナノ構造物形成用浸漬液に浸漬するステップと、を含む、超撥水表面が実現された伝熱管の製造方法。
[項目2]
上記1)ステップの有機溶媒は、アセトン、エタノール、およびこれらの混合物からなる群から選択される、項目1に記載の超撥水表面が実現された伝熱管の製造方法。
[項目3]
上記1)ステップで、アセトンに伝熱管を入れて3〜7分間1次超音波処理した後、エタノールに伝熱管を入れて3〜7分間2次超音波処理する、項目1または2に記載の超撥水表面が実現された伝熱管の製造方法。
[項目4]
上記2)ステップで、超音波処理した伝熱管を水で洗浄し、窒素ガスを用いて残留する水気を除去する、項目1から3の何れか一項に記載の超撥水表面が実現された伝熱管の製造方法。
[項目5]
上記3)ステップの酸性溶液が2Mの塩酸(HCl)である、項目1から4の何れか一項に記載の超撥水表面が実現された伝熱管の製造方法。
[項目6]
上記ナノ構造物形成用浸漬液は、水と、NaClO 2 と、NaOHと、Na 3 PO 4 と、を含む、項目1から5の何れか一項に記載の超撥水表面が実現された伝熱管の製造方法。
[項目7]
上記ナノ構造物形成用浸漬液は、水100重量部に対して、1〜4重量部のNaClO 2 と、3.5〜10重量部のNaOHと、5〜11重量部のNa 3 PO 4 と、を含む、項目6に記載の超撥水表面が実現された伝熱管の製造方法。
[項目8]
上記5)ステップで、ナノ構造物形成用浸漬液に伝熱管を10分以上浸漬する、項目1から7の何れか一項に記載の超撥水表面が実現された伝熱管の製造方法。
[項目9]
上記伝熱管の表面に形成されたナノ構造物がCu 2 OおよびCuOを含む、項目1から8の何れか一項に記載の超撥水表面が実現された伝熱管の製造方法。
[項目10]
上記伝熱管がアルブラス(Al‐bras)で構成される、項目1から9の何れか一項に記載の超撥水表面が実現された伝熱管の製造方法。
[項目11]
上記伝熱管は多数の伝熱管が組み立てられた形態である、項目1から10の何れか一項に記載の超撥水表面が実現された伝熱管の製造方法。
[項目12]
上記5)ステップの後、6)伝熱管をシラン系コーティング液に浸漬して、撥水コーティング層を形成するステップをさらに含む、項目1から11の何れか一項に記載の超撥水表面が実現された伝熱管の製造方法。
[項目13]
上記シラン系コーティング液は、HDFS(Heptadeca‐fluoro‐1,1,2,2,2 tetrahydrodecyl trichlorosilane)、TFTS(Trichloro(1H,1H,2H,2H‐perfluorooctyl)silane)、OTS(Trichloro(octyl)silane)、およびDCDMS(Dichlorodimethylsilane)からなる群から選択されるシラン系化合物を含む、項目12に記載の超撥水表面が実現された伝熱管の製造方法。
[項目14]
上記シラン系コーティング液は、揮発性溶媒をさらに含む、項目13に記載の超撥水表面が実現された伝熱管の製造方法。
[項目15]
上記揮発性溶媒がヘキサン(C 6 H 14 )である、項目14に記載の超撥水表面が実現された伝熱管の製造方法。
[項目16]
上記シラン系コーティング液は、揮発性溶媒100重量部を基準として、シラン系化合物0.1重量部以上を含む、項目14に記載の超撥水表面が実現された伝熱管の製造方法。
[項目17]
項目1から16の何れか一項に記載の製造方法により表面にナノ構造物が形成された、超撥水表面が実現された伝熱管。
[項目18]
上記ナノ構造物がCu −2 OおよびCuOを含む、項目17に記載の超撥水表面が実現された伝熱管。
[項目19]
シラン系化合物を含む撥水コーティング層をさらに含む、項目17または18に記載の超撥水表面が実現された伝熱管。
[項目20]
表面接触角が145度以上である、項目19に記載の超撥水表面が実現された伝熱管。
Claims (12)
- 1)Al、Zn、およびCuを構成成分として含む伝熱管を有機溶媒を用いて超音波処理するステップと、
2)前記1)ステップの超音波処理した伝熱管を洗浄するステップと、
3)前記2)ステップの洗浄した伝熱管を酸性溶液に浸漬して、伝熱管表面の金属酸化物を除去するステップと、
4)ナノ構造物形成用浸漬液を製造するステップであって、前記ナノ構造物形成用浸漬液は、水100重量部に対して、1〜4重量部のNaClO2と、3.5〜10重量部のNaOHと、5〜11重量部のNa3PO4と、を含む、ステップと、
5)前記3)ステップの金属酸化物を除去した、組み立てられた多数の伝熱管を、前記4)ステップのナノ構造物形成用浸漬液に10分以上浸漬するステップと、を含む、超撥水表面が実現された伝熱管の製造方法。 - 前記1)ステップの有機溶媒は、アセトン、エタノール、およびこれらの混合物からなる群から選択される、請求項1に記載の超撥水表面が実現された伝熱管の製造方法。
- 前記1)ステップで、アセトンに伝熱管を入れて3〜7分間1次超音波処理した後、エタノールに伝熱管を入れて3〜7分間2次超音波処理する、請求項1または2に記載の超撥水表面が実現された伝熱管の製造方法。
- 前記2)ステップで、超音波処理した伝熱管を水で洗浄し、窒素ガスを用いて残留する水気を除去する、請求項1から3の何れか一項に記載の超撥水表面が実現された伝熱管の製造方法。
- 前記3)ステップの酸性溶液が2Mの塩酸(HCl)である、請求項1から4の何れか一項に記載の超撥水表面が実現された伝熱管の製造方法。
- 前記伝熱管の表面に形成されたナノ構造物がCu 2 OおよびCuOを含む、請求項1から5の何れか一項に記載の超撥水表面が実現された伝熱管の製造方法。
- 前記伝熱管は多数の伝熱管が組み立てられた形態である、請求項1から6の何れか一項に記載の超撥水表面が実現された伝熱管の製造方法。
- 前記5)ステップの後、6)伝熱管をシラン系コーティング液に浸漬して、撥水コーティング層を形成するステップをさらに含む、請求項1から7の何れか一項に記載の超撥水表面が実現された伝熱管の製造方法。
- 前記シラン系コーティング液は、HDFS(Heptadeca‐fluoro‐1,1,2,2,2 tetrahydrodecyl trichlorosilane)、TFTS(Trichloro(1H,1H,2H,2H‐perfluorooctyl)silane)、OTS(Trichloro(octyl)silane)、およびDCDMS(Dichlorodimethylsilane)からなる群から選択されるシラン系化合物を含む、請求項8に記載の超撥水表面が実現された伝熱管の製造方法。
- 前記シラン系コーティング液は、揮発性溶媒をさらに含む、請求項9に記載の超撥水表面が実現された伝熱管の製造方法。
- 前記揮発性溶媒がヘキサン(C6H14)である、請求項10に記載の超撥水表面が実現された伝熱管の製造方法。
- 前記シラン系コーティング液は、揮発性溶媒100重量部を基準として、シラン系化合物0.1重量部以上を含む、請求項10に記載の超撥水表面が実現された伝熱管の製造方法。
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