JP2014218661A - ヒドロキシ基を含有するスルホン化ポリエーテルスルホンの共重合体及びその製造方法、燃料電池用高分子電解質膜及びそれを含む膜電極接合体 - Google Patents
ヒドロキシ基を含有するスルホン化ポリエーテルスルホンの共重合体及びその製造方法、燃料電池用高分子電解質膜及びそれを含む膜電極接合体 Download PDFInfo
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- 239000012528 membrane Substances 0.000 title claims abstract description 69
- 239000004695 Polyether sulfone Substances 0.000 title claims abstract description 64
- 125000002887 hydroxy group Chemical group [H]O* 0.000 title claims abstract description 64
- 229920006393 polyether sulfone Polymers 0.000 title claims abstract description 64
- 239000000446 fuel Substances 0.000 title claims abstract description 49
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- 238000002360 preparation method Methods 0.000 title 1
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- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 238000006277 sulfonation reaction Methods 0.000 claims abstract description 16
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 14
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- 239000000126 substance Substances 0.000 claims description 24
- 125000003545 alkoxy group Chemical group 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 21
- 229910052708 sodium Inorganic materials 0.000 claims description 16
- 239000011734 sodium Substances 0.000 claims description 16
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 15
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- LAQYHRQFABOIFD-UHFFFAOYSA-N 2-methoxyhydroquinone Chemical compound COC1=CC(O)=CC=C1O LAQYHRQFABOIFD-UHFFFAOYSA-N 0.000 claims description 12
- -1 alkoxyhydroquinone Chemical class 0.000 claims description 12
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- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 9
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- PLVUIVUKKJTSDM-UHFFFAOYSA-N 1-fluoro-4-(4-fluorophenyl)sulfonylbenzene Chemical compound C1=CC(F)=CC=C1S(=O)(=O)C1=CC=C(F)C=C1 PLVUIVUKKJTSDM-UHFFFAOYSA-N 0.000 claims description 5
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- 238000006068 polycondensation reaction Methods 0.000 claims description 5
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 5
- 239000012300 argon atmosphere Substances 0.000 claims description 4
- KCIDZIIHRGYJAE-YGFYJFDDSA-L dipotassium;[(2r,3r,4s,5r,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl] phosphate Chemical class [K+].[K+].OC[C@H]1O[C@H](OP([O-])([O-])=O)[C@H](O)[C@@H](O)[C@H]1O KCIDZIIHRGYJAE-YGFYJFDDSA-L 0.000 claims description 4
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- HHVIKAPRVLJTGO-UHFFFAOYSA-N 2-[(2-methylpropan-2-yl)oxy]benzene-1,4-diol Chemical compound CC(C)(C)OC1=CC(O)=CC=C1O HHVIKAPRVLJTGO-UHFFFAOYSA-N 0.000 claims description 3
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- PHNGKIFUTBFGAG-UHFFFAOYSA-N 2-ethoxybenzene-1,4-diol Chemical compound CCOC1=CC(O)=CC=C1O PHNGKIFUTBFGAG-UHFFFAOYSA-N 0.000 claims description 3
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- YSZZYBMLYZQBHR-UHFFFAOYSA-N 2-propoxybenzene-1,4-diol Chemical compound CCCOC1=CC(O)=CC=C1O YSZZYBMLYZQBHR-UHFFFAOYSA-N 0.000 claims description 3
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- 230000000052 comparative effect Effects 0.000 description 7
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 7
- 239000004215 Carbon black (E152) Substances 0.000 description 6
- 238000001157 Fourier transform infrared spectrum Methods 0.000 description 6
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- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 6
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- 238000000425 proton nuclear magnetic resonance spectrum Methods 0.000 description 5
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- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 4
- 125000003118 aryl group Chemical group 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
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- 239000000376 reactant Substances 0.000 description 2
- FAQYAMRNWDIXMY-UHFFFAOYSA-N trichloroborane Chemical compound ClB(Cl)Cl FAQYAMRNWDIXMY-UHFFFAOYSA-N 0.000 description 2
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- 238000010521 absorption reaction Methods 0.000 description 1
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- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
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- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
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- UQSQSQZYBQSBJZ-UHFFFAOYSA-N fluorosulfonic acid Chemical compound OS(F)(=O)=O UQSQSQZYBQSBJZ-UHFFFAOYSA-N 0.000 description 1
- 125000002510 isobutoxy group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])O* 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
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- 125000006606 n-butoxy group Chemical group 0.000 description 1
- 125000003506 n-propoxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
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- 239000001301 oxygen Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-M phenolate Chemical compound [O-]C1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-M 0.000 description 1
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- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
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- 238000001291 vacuum drying Methods 0.000 description 1
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Abstract
Description
(i)段階:スルホン酸ナトリウム基及びメトキシ基を含有するスルホン化ポリエーテルスルホンの共重合体Iの合成
250mLサイズの丸いフラスコにビス(4−フルオロ−3−スルホフェニル)スルホン二ナトリウム塩1.375g(3mmol)、ビス(4−フルオロフェニル)スルホン1.780g(7mmol)、2−メトキシヒドロキノン0.420g(3mmol)、ビスフェノールA1.598g(7mmol)、及び炭酸カリウム2.764g(20mmol)をジメチルアセトアミド10mLとトルエン5mLの混合物とに添加し、Dean−Stark装置を装着して、140℃で4時間還流させて脱水した後、反応物を170℃に昇温して、24時間反応させることによって、重合体溶液を得て、その重合体溶液をイソプロピルアルコールに沈澱させて重合体を析出し、その析出された重合体を水で数回洗浄及び真空乾燥することによって、スルホン酸ナトリウム基及びメトキシ基を含有するスルホン化ポリエーテルスルホンの共重合体Iを合成した。
前記(i)段階から合成された共重合体I2.0gをジメチルホルムアミド4mLに溶解させ、塩化チオニル20mLを添加して、60℃で4時間反応させた後、過量の塩化チオニルを蒸留過程を通じて除去した重合体溶液を得て、その重合体溶液をイソプロピルアルコールに沈澱させて重合体を析出し、その析出された重合体を水で数回洗浄及び真空乾燥することによって、スルホニルクロリド基及びメトキシ基を含有するスルホン化ポリエーテルスルホンの共重合体IIを合成した。
前記(ii)段階から合成された共重合体II2.0gを0℃でジクロロメタンに溶解させ、アルゴン雰囲気下で過量の三臭化ホウ素を徐々に添加して、6時間反応させた後、沈澱された重合体をフィルターを通じて回収、水洗及び真空乾燥することによって、スルホニルクロリド基及びヒドロキシ基を含有するスルホン化ポリエーテルスルホンの共重合体IIIを合成した。
前記(iii)段階から合成された共重合体IIIを10%塩酸溶液に3時間浸漬させた後、沸湯で24時間処理及び乾燥することによって、共重合体IIIのスルホニルクロリド基がスルホン酸基に切り替えられた前記化学式1で表されるヒドロキシ基を含有するスルホン化ポリエーテルスルホンの共重合体を製造した。
前記(iii)段階から合成された共重合体IIIをジメチルアセトアミドに溶解させて、2重量%の重合体溶液を得た。前記重合体溶液をガラス板に塗布した後、乾燥して膜を形成した。前記形成された膜を10%塩酸溶液に3時間浸漬させた後、沸湯で洗浄して、前記共重合体IIIのスルホニルクロリド基をスルホン酸基に切り替え、真空乾燥することによって、ヒドロキシ基を含有する燃料電池用高分子電解質膜を製造した。
前記(i)段階で、2−メトキシヒドロキノンを使わず、ビスフェノールA2.283g(10mmol)を使ったものを除いては、前記(i)段階と同じ方法で行って、スルホン酸ナトリウム基を含有するスルホン化ポリエーテルスルホンの共重合体を合成した。前記合成した共重合体から実施例2と同じ方法で行って、スルホン酸ナトリウム基がスルホン酸基に切り替えされ、ヒドロキシ基を含有しない燃料電池用高分子電解質膜を製造した。
Claims (16)
- スルホン化度が、30〜70%であることを特徴とする請求項1に記載のヒドロキシ基を含有するスルホン化ポリエーテルスルホンの共重合体。
- i)反応物であるビス(4−フルオロ−3−スルホフェニル)スルホン二ナトリウム塩または二カリウム塩、ビス(4−フルオロフェニル)スルホン、アルコキシヒドロキノン、4,4’−ビフェノール系化合物、及び炭酸カリウムを重合溶媒下で反応させて、ナトリウムまたはスルホン酸カリウム基及びアルコキシ基を含有するスルホン化ポリエーテルスルホンの共重合体Iを合成する段階と、
ii)共重合体Iのナトリウムまたはスルホン酸カリウム基をスルホニルクロリド基に切り替え反応させて、スルホニルクロリド基及びアルコキシ基を含有するスルホン化ポリエーテルスルホンの共重合体IIを合成する段階と、
iii)共重合体IIのアルコキシ基をヒドロキシ基に切り替え反応させて、スルホニルクロリド基及びヒドロキシ基を含有するスルホン化ポリエーテルスルホンの共重合体IIIを合成する段階と、
iv)共重合体IIIのスルホニルクロリド基をスルホン酸基に切り替え反応させる段階と、
を含むヒドロキシ基を含有するスルホン化ポリエーテルスルホンの共重合体の製造方法。 - 前記アルコキシヒドロキノンは、メトキシヒドロキノン、エトキシヒドロキノン、n−プロポキシヒドロキノン、イソプロポキシヒドロキノン、n−ブトキシヒドロキノン、イソブトキシヒドロキノン、及びtert−ブトキシヒドロキノンからなる群から選択された何れか1つであることを特徴とする請求項3に記載のヒドロキシ基を含有するスルホン化ポリエーテルスルホンの共重合体の製造方法。
- 前記i)段階の共重合体Iは、前記反応物を重合溶媒と混合して、130〜140℃で3〜4時間還流させて脱水した後、160〜180℃に昇温して、12〜24時間反応させることによって、重合体溶液を得て、その重合体溶液をイソプロピルアルコールに沈澱、水洗及び真空乾燥して合成されることを特徴とする請求項3に記載のヒドロキシ基を含有するスルホン化ポリエーテルスルホンの共重合体の製造方法。
- 前記重合溶媒は、ジメチルアセトアミド(DMAc)またはジメチルスルホキシド(DMSO)とトルエンとの2:1(体積比)の混合物であることを特徴とする請求項3または6に記載のヒドロキシ基を含有するスルホン化ポリエーテルスルホンの共重合体の製造方法。
- 前記ii)段階の切り替え反応は、共重合体Iをジメチルホルムアミドに溶解させ、50〜60℃で3〜4時間塩化チオニルと反応させた後、過量の塩化チオニルが蒸留によって除去された重合体溶液を得て、その重合体溶液をイソプロピルアルコールに沈澱、水洗及び真空乾燥して行われることを特徴とする請求項3に記載のヒドロキシ基を含有するスルホン化ポリエーテルスルホンの共重合体の製造方法。
- 前記iii)段階の切り替え反応は、共重合体IIを0℃の以下でジクロロメタンに溶解させ、アルゴン雰囲気下で過量の脱アルキル化剤を徐々に添加して、6〜8時間反応させた後、沈澱された生成物をフィルターを通じて回収、水洗及び真空乾燥して行われることを特徴とする請求項3に記載のヒドロキシ基を含有するスルホン化ポリエーテルスルホンの共重合体の製造方法。
- 脱アルキル化剤は、強いルイス酸またはハロゲン化水素であることを特徴とする請求項9に記載のヒドロキシ基を含有するスルホン化ポリエーテルスルホンの共重合体の製造方法。
- 強いルイス酸は、三臭化ホウ素であることを特徴とする請求項10に記載のヒドロキシ基を含有するスルホン化ポリエーテルスルホンの共重合体の製造方法。
- 前記iv)段階の切り替え反応は、共重合体IIIを薄い硫酸または塩酸溶液に3〜4時間浸漬させた後、沸湯で12〜24時間処理及び乾燥して行われることを特徴とする請求項3に記載のヒドロキシ基を含有するスルホン化ポリエーテルスルホンの共重合体の製造方法。
- 請求項1または2に記載のヒドロキシ基を含有するスルホン化ポリエーテルスルホンの共重合体を含む燃料電池用高分子電解質膜。
- i)請求項3に記載の共重合体IIIをジメチルアセトアミド、ジメチルスルホキシドまたはN−メチルピロリドンに溶解させて、2〜5重量%の重合体溶液を得る段階と、
ii)前記重合体溶液をガラス板に塗布した後、乾燥して膜を形成する段階と、
iii)前記膜を薄い硫酸または塩酸溶液に3〜4時間浸漬させた後、沸湯で洗浄する段階と、
を含む燃料電池用高分子電解質膜の製造方法。 - 請求項13に記載の燃料電池用高分子電解質膜が、アノードとカソードとの間に配された燃料電池用膜電極接合体。
- 請求項15に記載の膜電極接合体を含む燃料電池。
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