JP4946009B2 - 固体高分子型燃料電池用電解質材料、固体高分子型燃料電池用膜・電極接合体の製造方法 - Google Patents
固体高分子型燃料電池用電解質材料、固体高分子型燃料電池用膜・電極接合体の製造方法 Download PDFInfo
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- 229920000642 polymer Polymers 0.000 title claims description 88
- 239000002001 electrolyte material Substances 0.000 title claims description 54
- 239000000446 fuel Substances 0.000 title claims description 41
- 239000012528 membrane Substances 0.000 title claims description 37
- 238000004519 manufacturing process Methods 0.000 title claims description 26
- 239000007787 solid Substances 0.000 title claims description 9
- 238000006116 polymerization reaction Methods 0.000 claims description 53
- 239000005518 polymer electrolyte Substances 0.000 claims description 28
- 229910052731 fluorine Inorganic materials 0.000 claims description 22
- 239000000178 monomer Substances 0.000 claims description 22
- 239000003054 catalyst Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 20
- 239000003792 electrolyte Substances 0.000 claims description 19
- 238000002835 absorbance Methods 0.000 claims description 18
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 claims description 15
- 238000002329 infrared spectrum Methods 0.000 claims description 8
- 125000004430 oxygen atom Chemical group O* 0.000 claims description 8
- 239000007870 radical polymerization initiator Substances 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 7
- 125000001153 fluoro group Chemical group F* 0.000 claims description 7
- 125000000542 sulfonic acid group Chemical group 0.000 claims description 6
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 5
- 229910052801 chlorine Chemical group 0.000 claims description 4
- 125000001309 chloro group Chemical group Cl* 0.000 claims description 3
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 claims description 2
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 claims description 2
- 125000004432 carbon atom Chemical group C* 0.000 claims 1
- 210000004027 cell Anatomy 0.000 description 33
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 12
- 229910052799 carbon Inorganic materials 0.000 description 12
- 239000011737 fluorine Substances 0.000 description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 11
- 229920001577 copolymer Polymers 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- UJIGKESMIPTWJH-UHFFFAOYSA-N 1,3-dichloro-1,1,2,2,3-pentafluoropropane Chemical compound FC(Cl)C(F)(F)C(F)(F)Cl UJIGKESMIPTWJH-UHFFFAOYSA-N 0.000 description 8
- 239000007789 gas Substances 0.000 description 8
- 239000003999 initiator Substances 0.000 description 8
- 238000005259 measurement Methods 0.000 description 8
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- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 7
- 239000000843 powder Substances 0.000 description 7
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 6
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- -1 perfluoro- (2-methylene-4-methyl-1,3-dioxolane) Compound Chemical class 0.000 description 6
- 239000003505 polymerization initiator Substances 0.000 description 6
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 5
- 238000010828 elution Methods 0.000 description 5
- 230000007062 hydrolysis Effects 0.000 description 5
- 238000006460 hydrolysis reaction Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
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- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 4
- 238000005342 ion exchange Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000020477 pH reduction Effects 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 125000004429 atom Chemical group 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
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- 238000007720 emulsion polymerization reaction Methods 0.000 description 3
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 3
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- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 238000010557 suspension polymerization reaction Methods 0.000 description 3
- OHMHBGPWCHTMQE-UHFFFAOYSA-N 2,2-dichloro-1,1,1-trifluoroethane Chemical compound FC(F)(F)C(Cl)Cl OHMHBGPWCHTMQE-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000004566 IR spectroscopy Methods 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
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- 238000012662 bulk polymerization Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000012986 chain transfer agent Substances 0.000 description 2
- KYKAJFCTULSVSH-UHFFFAOYSA-N chloro(fluoro)methane Chemical compound F[C]Cl KYKAJFCTULSVSH-UHFFFAOYSA-N 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000007323 disproportionation reaction Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 2
- 229920006158 high molecular weight polymer Polymers 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000002978 peroxides Chemical class 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- RKIMETXDACNTIE-UHFFFAOYSA-N 1,1,2,2,3,3,4,4,5,5,6,6-dodecafluorocyclohexane Chemical compound FC1(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C1(F)F RKIMETXDACNTIE-UHFFFAOYSA-N 0.000 description 1
- AJDIZQLSFPQPEY-UHFFFAOYSA-N 1,1,2-Trichlorotrifluoroethane Chemical compound FC(F)(Cl)C(F)(Cl)Cl AJDIZQLSFPQPEY-UHFFFAOYSA-N 0.000 description 1
- WUMVZXWBOFOYAW-UHFFFAOYSA-N 1,2,3,3,4,4,4-heptafluoro-1-(1,2,3,3,4,4,4-heptafluorobut-1-enoxy)but-1-ene Chemical compound FC(F)(F)C(F)(F)C(F)=C(F)OC(F)=C(F)C(F)(F)C(F)(F)F WUMVZXWBOFOYAW-UHFFFAOYSA-N 0.000 description 1
- BZPCMSSQHRAJCC-UHFFFAOYSA-N 1,2,3,3,4,4,5,5,5-nonafluoro-1-(1,2,3,3,4,4,5,5,5-nonafluoropent-1-enoxy)pent-1-ene Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)=C(F)OC(F)=C(F)C(F)(F)C(F)(F)C(F)(F)F BZPCMSSQHRAJCC-UHFFFAOYSA-N 0.000 description 1
- JWKJOADJHWZCLL-UHFFFAOYSA-N 1,2,3,4,5,5,6,6,6-nonafluoro-1-(1,2,3,4,5,5,6,6,6-nonafluorohexa-1,3-dienoxy)hexa-1,3-diene Chemical compound FC(OC(F)=C(F)C(F)=C(F)C(F)(F)C(F)(F)F)=C(F)C(F)=C(F)C(F)(F)C(F)(F)F JWKJOADJHWZCLL-UHFFFAOYSA-N 0.000 description 1
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- HFNSTEOEZJBXIF-UHFFFAOYSA-N 2,2,4,5-tetrafluoro-1,3-dioxole Chemical compound FC1=C(F)OC(F)(F)O1 HFNSTEOEZJBXIF-UHFFFAOYSA-N 0.000 description 1
- GVEUEBXMTMZVSD-UHFFFAOYSA-N 3,3,4,4,5,5,6,6,6-nonafluorohex-1-ene Chemical group FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C=C GVEUEBXMTMZVSD-UHFFFAOYSA-N 0.000 description 1
- YSYRISKCBOPJRG-UHFFFAOYSA-N 4,5-difluoro-2,2-bis(trifluoromethyl)-1,3-dioxole Chemical compound FC1=C(F)OC(C(F)(F)F)(C(F)(F)F)O1 YSYRISKCBOPJRG-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 239000012028 Fenton's reagent Substances 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229920001774 Perfluoroether Polymers 0.000 description 1
- 229910001260 Pt alloy Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001721 carbon Chemical group 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- POLCUAVZOMRGSN-UHFFFAOYSA-N dipropyl ether Chemical compound CCCOCCC POLCUAVZOMRGSN-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003411 electrode reaction Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000012025 fluorinating agent Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- BCCOBQSFUDVTJQ-UHFFFAOYSA-N octafluorocyclobutane Chemical compound FC1(F)C(F)(F)C(F)(F)C1(F)F BCCOBQSFUDVTJQ-UHFFFAOYSA-N 0.000 description 1
- 235000019407 octafluorocyclobutane Nutrition 0.000 description 1
- 239000003960 organic solvent Substances 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
- 239000001301 oxygen Substances 0.000 description 1
- UJMWVICAENGCRF-UHFFFAOYSA-N oxygen difluoride Chemical class FOF UJMWVICAENGCRF-UHFFFAOYSA-N 0.000 description 1
- 229960004624 perflexane Drugs 0.000 description 1
- FYJQJMIEZVMYSD-UHFFFAOYSA-N perfluoro-2-butyltetrahydrofuran Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C1(F)OC(F)(F)C(F)(F)C1(F)F FYJQJMIEZVMYSD-UHFFFAOYSA-N 0.000 description 1
- ZJIJAJXFLBMLCK-UHFFFAOYSA-N perfluorohexane Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F ZJIJAJXFLBMLCK-UHFFFAOYSA-N 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
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Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Inert Electrodes (AREA)
- Fuel Cell (AREA)
Description
[F(CF 2 ) p COO] 2 (2)
式中、pは4〜10の整数である。
[CF 3 CF 2 CF 2 O(CF(CF 3 )CF 2 O) q CF(CF 3 )COO] 2 (3)
式中、qは0〜8の整数である。
CF2=CF(OCF2CFY)mOk(CF2)nSO2F (1)
式中、Yはフッ素原子又はトリフルオロメチル基、mは0〜3の整数、kは0又は1、nは1〜12の整数をそれぞれ示し、かつ(m+k)>0である。
CF2=CFO(CF2CF(CF3)O)n(CF2)mSO2F (4)
式中、mは2〜4の整数であり、nは0〜2の整数である。
具体的には、CF2=CFO(CF2)2SO2F、CF2=CFO(CF2)3SO2F、CF2=CFOCF2CF(CF3)O(CF2)2SO2F、CF2=CFOCF2CF(CF3)O(CF2)3SO2F、CF2=CFO(CF2CF(CF3)O)2(CF2)2SO2F、CF2=CFO(CF2CF(CF3)O)2(CF2)3SO2F等が挙げられる。
[F(CF2)pCOO]2 (2)
式中、pは4〜10の整数である。
[CF3CF2CF2O(CF(CF3)CF2O)qCF(CF 3 )COO]2 (3)
式中、qは0〜8の整数である。
I1690:波数1690±10cm−1の帯域の最大吸光度、
I2350:波数2350±10cm−1の帯域の最大吸光度。
波数1690±10cm−1は、−COOKの吸収に相当し、波数2350±10cm−1は、主鎖−CF2−の吸収に相当する。−COOKはポリマーの不安定末端基である−COF、−COOHに由来するので、吸光度比I1690/I2350は不安定末端基のポリマー主鎖(−CF2−)に対する相対的量を表す。すなわち、この比の数値が低いほどポリマーの不安定末端基の量が少なく好ましいことを意味する。ポリマーを固体高分子型燃料電池用電解質材料として使用するには、I1690/I2350が0.10以下であることが好ましく、0.05以下がより好ましい。
ポリマーのTQは、フローテスターCFT−500D(島津製作所製)を用いて測定した。
ポリマーのARは、ポリマーを一定濃度のNaOHの水/メタノールを溶媒とする溶液に浸漬して加水分解し、その溶液を逆滴定することにより求めた。
撹拌機を有する1Lステンレス製反応器にCHClFCF2CF2Cl(以下、HCFC−225cbという。)を97.74g、CF2=CFOCF2CF(CF3)O(CF2)2SO2F(以下、PSVEという。)を746.02g入れ、内部を脱気した。その後、20℃の内温で、テトラフルオロエチレン(以下、TFEという。)を圧力が0.33MPaG(ゲージ圧、以下同じ。)になるまで仕込んだ。次いで開始剤としての[CF3CF2CF2OCF(CF3)CF2OCF(CF3)COO]2を8質量%の濃度でHCFC−225cbに溶解した溶液を3.3g仕込み、重合を開始した。重合の進行に伴い、圧力が低下するので、圧力が一定になるようにTFEを連続的に後仕込みした。後仕込みのTFE量が50gになったところで内温を10℃まで冷却し、未反応TFEを空放し、圧力容器を開放した。
HCFC−225cbを38.75g、PSVEを719.0g入れ、TFEを圧力が0.36MPaGになるまで仕込み、開始剤としての[CF3CF2CF2OCF(CF3)CF2OCF(CF3)COO]2を13.5質量%の濃度でHCFC−225cbに溶解した溶液を12.4g仕込み、後仕込みのTFE量を13.5gとしたこと以外は実施例1と同様に重合して、白色粉体であるTFE/PSVEコポリマー39.2gを得た。得られたポリマー中にスケールは確認できなかった。ポリマーのTQは測定装置の測定可能な上限を超えており不明であった。ARは1.150ミリ当量/g乾燥樹脂であった。
実施例1と同様にして測定、算出したフッ素イオン溶出量は、ポリマー中の全フッ素量の0.003%であった。
撹拌器を有する2.5Lステンレス製反応器を用い、HCFC−225cbを212.91g、PSVEを1738.60g入れ、TFEを圧力が0.21MPaGになるまで仕込み、開始剤としての[CF3CF2CF2OCF(CF3)CF2OCF(CF3)COO]2を5.2質量%の濃度でHCFC−225cbに溶解した溶液を17.865g仕込み、後仕込みのTFE量を33.0gとしたこと以外は実施例1と同様に重合して、白色粉体であるTFE/PSVEコポリマー55.0gを得た。得られたポリマー中にスケールは確認できなかった。ポリマーのTQは229.3℃、ARは1.403ミリ当量/g乾燥樹脂であった。
実施例1と同様にして測定、算出したフッ素イオン溶出量は、ポリマー中の全フッ素量の0.001%であった。
撹拌機を有する0.2Lステンレス製反応器にHCFC−225cbを77.65g、PSVEを147.62g入れ、脱気を行った。その後、30℃の内温で、TFEを圧力が0.33MPaGになるまで仕込んだ。次いで開始剤としての(CF3CF2CF2COO)2を3質量%の濃度でHCFC−225cbに溶解した溶液を4.92g仕込み重合を開始した。重合の進行に伴い、圧力が低下するので、圧力が一定になるようにTFEを連続的に後仕込みした。後仕込みのTFE量が11.1gになったところで内温を10℃まで冷却し、未反応TFEを空放し、圧力容器を開放した。
また、実施例1と同様にして測定、算出したフッ素イオン溶出量は、ポリマー中の全フッ素量の0.007%であった。
重合開始剤としてのアゾイソブチロニトリルを232.9mg仕込み、重合温度を70℃、重合圧力を1.15MPaGにした以外は実施例1と同様にして、白色粉体であるTFE/PSVEコポリマー105.0gを得た。
得られたポリマーのTQは220℃、ARは1.100ミリ当量/g乾燥樹脂であった。
また、実施例1と同様にして測定、算出したフッ素イオン溶出量は、ポリマー中の全フッ素量の0.04%であった。
Claims (4)
- スルホン酸基を有するポリマーからなる固体高分子型燃料電池用電解質材料の製造方法であって、
−SO2X基(Xはフッ素原子又は塩素原子)を有しエチレン性二重結合を有するパーフルオロカーボンモノマー(A)(エーテル結合性の酸素原子を含んでいてもよい)と、二重結合を有しかつ炭素原子、フッ素原子及び酸素原子以外の原子を含まないパーフルオロカーボンモノマー(B)の少なくとも1種とを、式(2)又は式(3)で表される化合物からなるラジカル重合開始剤を用い、0〜35℃の重合温度で共重合させる重合工程を経ることを特徴とする固体高分子型燃料電池用電解質材料の製造方法。
[F(CF 2 ) p COO] 2 (2)
式中、pは4〜10の整数である。
[CF 3 CF 2 CF 2 O(CF(CF 3 )CF 2 O) q CF(CF 3 )COO] 2 (3)
式中、qは0〜8の整数である。 - 前記パーフルオロカーボンモノマー(A)は式(1)で表されるモノマーであり、前記パーフルオロカーボンモノマー(B)はテトラフルオロエチレンである請求項1に記載の固体高分子型燃料電池用電解質材料の製造方法。
CF2=CF(OCF2CFY)mOk(CF2)nSO2F (1)
式中、Yはフッ素原子又はトリフルオロメチル基、mは0〜3の整数、kは0又は1、nは1〜12の整数をそれぞれ示し、かつ(m+k)>0である。 - 前記ポリマーのスルホン酸基をカリウム塩型としたポリマーは、赤外スペクトルにおける下記のとおり定義される吸光度比I1690/I2350が0.10以下である請求項1又は2に記載の固体高分子型燃料電池用電解質材料の製造方法。
I1690:波数1690±10cm−1の帯域の最大吸光度、
I2350:波数2350±10cm−1の帯域の最大吸光度。 - 触媒と電解質材料とを含む触媒層をそれぞれ有するアノード及びカソードと、それらの間に配置される電解質膜とからなる固体高分子型燃料電池用膜・電極接合体の製造方法において、前記電解質膜を構成する電解質材料、前記アノード触媒層に含まれる電解質材料及び前記カソード触媒層に含まれる電解質材料の少なくとも1つの電解質材料を、請求項1〜3のいずれかに記載の方法により製造することを特徴とする固体高分子型燃料電池用膜・電極接合体の製造方法。
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