CN113736120B - 一种燃料电池用n-螺环季铵盐官能化聚芳醚酮阴离子交换膜的制备方法 - Google Patents
一种燃料电池用n-螺环季铵盐官能化聚芳醚酮阴离子交换膜的制备方法 Download PDFInfo
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- 229920006260 polyaryletherketone Polymers 0.000 title claims abstract description 44
- 239000003011 anion exchange membrane Substances 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 239000000446 fuel Substances 0.000 title claims abstract description 21
- 239000002608 ionic liquid Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 26
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 22
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 21
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 13
- 238000010992 reflux Methods 0.000 claims description 12
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 11
- 239000000047 product Substances 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 9
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 claims description 9
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 239000002904 solvent Substances 0.000 claims description 8
- BHELZAPQIKSEDF-UHFFFAOYSA-N allyl bromide Chemical compound BrCC=C BHELZAPQIKSEDF-UHFFFAOYSA-N 0.000 claims description 7
- ZFVMWEVVKGLCIJ-UHFFFAOYSA-N bisphenol AF Chemical compound C1=CC(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C=C1 ZFVMWEVVKGLCIJ-UHFFFAOYSA-N 0.000 claims description 7
- ULTHEAFYOOPTTB-UHFFFAOYSA-N 1,4-dibromobutane Chemical compound BrCCCCBr ULTHEAFYOOPTTB-UHFFFAOYSA-N 0.000 claims description 6
- WOCGGVRGNIEDSZ-UHFFFAOYSA-N 4-[2-(4-hydroxy-3-prop-2-enylphenyl)propan-2-yl]-2-prop-2-enylphenol Chemical compound C=1C=C(O)C(CC=C)=CC=1C(C)(C)C1=CC=C(O)C(CC=C)=C1 WOCGGVRGNIEDSZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 6
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 6
- HDOWRFHMPULYOA-UHFFFAOYSA-N piperidin-4-ol Chemical compound OC1CCNCC1 HDOWRFHMPULYOA-UHFFFAOYSA-N 0.000 claims description 6
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 5
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 239000000178 monomer Substances 0.000 claims description 5
- 239000012312 sodium hydride Substances 0.000 claims description 5
- 229910000104 sodium hydride Inorganic materials 0.000 claims description 5
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 claims description 5
- 125000003118 aryl group Chemical group 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000010534 nucleophilic substitution reaction Methods 0.000 claims description 4
- LSQARZALBDFYQZ-UHFFFAOYSA-N 4,4'-difluorobenzophenone Chemical compound C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 LSQARZALBDFYQZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 238000010907 mechanical stirring Methods 0.000 claims description 3
- 230000001376 precipitating effect Effects 0.000 claims description 3
- 239000012153 distilled water Substances 0.000 claims description 2
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- 238000010438 heat treatment Methods 0.000 claims 2
- 229910001873 dinitrogen Inorganic materials 0.000 claims 1
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 claims 1
- 239000003513 alkali Substances 0.000 abstract description 17
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 8
- 239000011159 matrix material Substances 0.000 abstract description 5
- 229920000642 polymer Polymers 0.000 abstract description 5
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- 125000005336 allyloxy group Chemical group 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 abstract 1
- 238000002791 soaking Methods 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 7
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000012528 membrane Substances 0.000 description 4
- 235000011181 potassium carbonates Nutrition 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 3
- 229930185605 Bisphenol Natural products 0.000 description 2
- 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 2
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical group C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 2
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- 150000002500 ions Chemical class 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
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- -1 1, 4-dibromobutane ethanol Chemical compound 0.000 description 1
- 238000005160 1H NMR spectroscopy Methods 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000005481 NMR spectroscopy Methods 0.000 description 1
- 238000006959 Williamson synthesis reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 125000000746 allylic group Chemical group 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 239000004305 biphenyl Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 150000001768 cations Chemical group 0.000 description 1
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- 235000020188 drinking water Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- QWUSZZFQJJEAKG-UHFFFAOYSA-N ethanol;piperidin-4-ol Chemical compound CCO.OC1CCNCC1 QWUSZZFQJJEAKG-UHFFFAOYSA-N 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
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- 230000007774 longterm Effects 0.000 description 1
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- 230000001590 oxidative effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
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Abstract
本发明提供了一种燃料电池用N‑螺环季铵盐官能化聚芳醚酮阴离子交换膜的制备方法,该阴离子交换膜由含有不同比例烯丙基侧链的聚芳醚酮为高分子基体,高耐碱的8‑(烯丙氧基)‑5‑氮杂‑螺[4.5]癸烷(AL‑ASD)离子液体为活性集团,制备而成的一种聚芳醚酮阴离子交换膜材料。结果表明,该阴离子交换膜是一种具有高耐碱稳定性、良好的力学强度、柔韧性能和较高的尺寸稳定性的材料。其中ASD‑PAEK‑0.7在30℃‑80℃,氢氧根离子电导率是0.029‑0.065 S/cm‑1。在80℃的1 M KOH溶液中浸泡720小时后,ASD‑PAEK‑0.7阴离子交换膜的剩余电导率保持在其初始值的84%以上。另外,ASD‑PAEK‑0.7阴离子交换膜在80℃的溶胀率仅有6.3%。且其拉伸强度在43‑51MPa,柔韧性良好,有望应用于燃料电池领域。
Description
技术领域
本发明提供了一种燃料电池用N-螺环季铵盐官能化聚芳醚酮阴离子交换膜及其制备方法,属于高分子化学和阴离子交换膜燃料电池领域。
背景技术
燃料电池是一种将存在于燃料与氧化剂中的化学能直接转化为电能的发电装置,被认为是最有前景的环保电源和常规化石燃料的替代品。其转化效率高,产物清洁无污染,其排放物大部分是水。碱性燃料电池主要应用在航空航天领域,为航天飞机提供动力和饮用水。碱性阴离子交换膜燃料电池因其成本低,碱性条件下反应动力学过程较快,近年来发展较为迅速。
碱性阴离子交换膜作为碱性阴离子交换膜燃料电池的关键组成部分,起到分离燃料和氧化剂的作用,同时传递OH-离子。实际应用中,要求碱性阴离子交换膜具有良好的热稳定性、化学稳定性,足够的机械强度,一定的离子电导率。为提高碱性条件下的稳定性,近年来,联苯结构主链或无醚键结构主链研究较为火热,以及变氨基结构。或者是提高阳离子集团的稳定性,增加季铵盐周边的位阻等,如N-螺环结构季铵盐。聚芳醚酮的化学稳定性较好,耐酸碱腐蚀性好。N-螺环季铵盐增大了季铵盐的空间位阻,降低了碱性条件下OH-对季铵盐集团的亲核攻击,提高了耐碱稳定性。
发明内容
本发明合成了一种双侧带有烯丙基支链的聚芳醚酮,以其改性聚芳醚酮为基质,合成了高耐碱的N-螺环季铵盐离子液体作为阳离子团,制备了一种燃料电池用N-螺环季铵盐官能化聚芳醚酮阴离子交换膜。
本发明提供一种料电池用N-螺环季铵盐官能化聚芳醚酮阴离子交换膜制备方法,步骤和条件如下:
(1)含有不同比例不饱和双键结构的聚芳醚酮的制备
将有机单体双酚AF、4,4'-二氟二苯甲酮和2,2'-二烯丙基双酚A按照摩尔比(分别是0.4:1:0.6,0.3:1:0.7,0.2:1:0.8和0.1:1:0.9)溶于环丁砜溶剂中,加入1-2倍摩尔量的无水碳酸钾,在机械搅拌和氮气保护下,通过芳香族亲核取代反应合成聚芳醚酮主链;
(2) N-螺环季铵盐离子液体的制备
a、8-羟基-5-氮杂-螺[4.5]癸烷(OH-ASD)的制备
将1,4-二溴丁烷和4-羟基哌啶在碳酸钾的催化下以摩尔比1:1反应,将1,4-二溴丁烷乙醇溶液和无水碳酸钾加热至回流,搅拌下滴加4-羟基哌啶的乙醇溶液,保持回流24小时,将产物在过量甲基叔丁基醚中沉淀。放置在真空烘箱中40℃烘干24小时;
b、8-(烯丙氧基)-5-氮杂-螺[4.5]癸烷(AL-ASD)离子液体的制备
将8-羟基-5-氮杂-螺[4.5]癸烷和氢化钠以摩尔比1:1.5溶解在无水二甲基亚砜(DMSO)中,反应彻底后,加入3-溴丙烯2h-4h,即可获得N-螺环离子液体支链,在甲苯中沉淀;
(3) N-螺环季铵盐官能化聚芳醚酮阴离子交换膜的制备
将聚芳醚酮和N-螺环季铵盐离子液体溶解N-甲基吡咯烷酮中搅拌12个小时,加入一定量的过氧化苯甲酰在35℃反应12小时。将产物在乙醇中沉淀、干燥,并在N-甲基吡咯烷酮中溶解,采用流延法成膜。
本发明的有益效果
本发明制备的一种燃料电池用N-螺环季铵盐官能化聚芳醚酮阴离子交换膜,该阴离子交换膜的显著特点在于合成了具有高耐碱的具有双侧不饱和双键结构的聚芳醚酮为高分子基体,制备了高耐碱的N-螺环季铵盐离子液体为活性集团,复合而成一种具有高耐碱稳定性、良好的力学强度、柔韧性能和较高的尺寸稳定性的阴离子交换膜材料。合成的具有双侧烯丙基侧链的聚芳醚酮,拓展了聚芳醚酮的应用条件。N-螺环季铵盐具有较高的耐碱稳定性,通过接入3-溴丙烯,跟主链接枝后形成N-螺环季铵盐与主链之间形成5碳间隔的柔性烷基链,有利于亲水相和疏水相形成微相分离结构,促进OH-离子传递。同时未接枝的烯丙基侧链,增加膜材料的疏水性,阻碍了水分子的渗入,提高膜材料的尺寸稳定性。同时对OH-对离子集团的进攻有一定的抑制作用,提高了耐碱稳定性。相对有其他以聚芳醚酮为基质的阴离子交换膜有显著的优势。
附图说明
图1 膜材料制备过程实物展示
图2a、图2b分别是N-螺环季铵盐离子液体和聚芳醚酮的核磁氢谱谱图;
图3为膜样品在不同温度下的吸水率图和溶胀率图;
图4为膜样品的电导率随温度变化曲线图;
图5为膜样品的拉伸图;
图6为膜样品的测试耐碱稳定性。
具体实施方式
首先,1,4-二溴丁烷和4-羟基哌啶合成8-羟基-5-氮杂-螺[4.5]癸烷(OH-ASD)。然后和3-溴丙烯合成离子液体(如式Ⅰ(a)所示)。4,4'-二氟二苯甲酮、2,2'-二烯丙基双酚A和双酚AF通过芳香族亲核取代反应合成带有不饱和键的聚芳醚酮(PAEK-X)(如式Ⅰ(b)所示)。在这项工作中,其中 x (x = 0.6、0.7、0.8 和 0.9) 表示含烯丙基双酚单体的摩尔百分比占双酚单体总摩尔数。
在此,该发明以ASD-PAEK-0.7 的合成为例,描述一种燃料电池用N-螺环季铵盐官能化聚芳醚酮阴离子交换膜制备的具体实施步骤:
(1)含有双侧烯丙基支链结构的聚芳醚酮的制备
首先,将4,4'-二氟二苯甲酮、双酚AF、2,2'-二烯丙基双酚A和K2CO3以摩尔比1:0.3:0.7:1.5加入到带有机械搅拌器的100 mL三口烧瓶中。在氮气气氛下,加入环丁砜和甲苯溶解并搅拌均匀。将混合物在120℃-130℃保持回流4小时,然后缓慢升温至180℃,直到混合物溶液变得粘稠。将产物倒入去离子水中并快速搅拌得到白色固体沉淀,命名为PAEK-0.7。最后,将产物切碎并在蒸馏水中煮沸3-5次,然后在60℃下真空干燥12小时;
(2)N-螺环季铵盐离子液体的制备
a、8-羟基-5-氮杂-螺[4.5]癸烷(OH-ASD)的制备:
将6.16 mL的1,4-二溴丁烷和等摩尔碳酸钾加入到50 mL的乙醇溶液中加热至回流,在搅拌下,缓慢滴加5.17g 4-羟基哌啶的20 mL乙醇溶液,保持回流24小时,将产物在过量甲基叔丁基醚中沉淀。放置在40℃真空烘箱中干燥24小时;
b、8-(烯丙氧基)-5-氮杂-螺[4.5]癸烷(AL-ASD)离子液体的制备:
将8-羟基-5-氮杂-螺[4.5]癸烷和氢化钠以摩尔比1:1.5溶解在20 mL无水二甲基亚砜(DMSO)中,反应6小时后,加入等摩尔3-溴丙烯反应2-4个小时,并在过量甲苯中沉淀;
(3)N-螺环季铵盐官能化聚芳醚酮阴离子交换膜的制备
将0.3 g PAEK-0.7和0.235 g AL-ASD 在35℃搅拌下溶解在 12 mL N-甲基吡咯烷酮溶剂中过夜。然后将过氧化苯甲酰(BPO,0.412g)加入到溶液中并保持搅拌。反应12小时后,混合物用乙醇沉淀并洗涤,在40°C真空干燥。最后,将聚合物0.3 g溶解在8 mL N-甲基吡咯烷酮溶剂中,然后将溶液倒入干净的玻璃板上并在80 °C下干燥。所得膜在1M KOH水溶液中浸泡48小时,使用前用去离子水冲洗数次。
下面对制得的膜样品ASD-PAEK-0.6、ASD-PAEK-0.7、ASD-PAEK-0.8、ASD-PAEK-0.9,进行结构表征和性能表征。
(1)核磁谱图
烯丙基 N-螺环阳离子 (AL-ASD) 是由威廉姆森合成设计的。 如图 2(a) 所示,AL-ASD 的化学结构由 1H NMR 确认,显示了 OH-ASD 的特征信号(即 3.60 ppm (H2',H4'), 3.45 ppm (H5'), 2.13–1.73 ppm (H6', H3')) 和烯丙基(即 5.94–5.81 (Hb)、5.09-5.33 (Ha) 和 4.00 ppm (Hc))。 在 PAEK-x 的光谱(图 2(b))中,6.63-6.15 ppm(Hc,Hb)的信号对应于 CH=CH 质子。 此外,在 2.87 ppm(H2、H3、H5)和 2.05 ppm(H1、H4)处出现的信号属于 N-螺环的质子。
(2)吸水率、溶胀率和阴离子电导率
图3为膜样品在80℃下的吸水率和溶胀率图,具有双侧烯丙基支链的 PAEK 增加了其自身的疏水性。 随着接枝的增加,ASD-PAEK-0.7的吸水率和疏水性达到了较好的平衡。如图 3所示,ASD-PAEK-X 膜具有更好的尺寸稳定性。 ASD-PAEK-0.7的吸水率仅为3.2%,溶胀率仅为6.35%,在有文献报道的具有5-/6-元的N-螺环AEMs中也是最好的;图4为膜样品的离子传导率随温度变化曲线图,由图可知, ASD-PAEK-0.7在 80°C 时表现出最高的 OH- 电导率为 64.6 mS cm-1。 然而,随着未接枝的疏水性烯丙基侧链增加,抑制了吸水率的进一步提高,不利于OH- 传输。 因此,需要进一步提高吸水率和接枝率,同时保持尺寸稳定性。
(3)机械性能
图5为膜样品的拉伸强度(TS)和断裂伸长率(EB),该膜材料具有较好的柔韧性,其拉伸强度为43-51 MPa,断裂伸长率在3.63%-5.35%的范围。随着接枝率的增加,膜材料的拉伸强度略有下降。由于接枝的柔性侧链增加链缠结,增加了其断裂伸长率。
(4)耐碱稳定性
图6为膜的耐碱稳定性测试图,为了测试该阴离子交换膜的长期化学稳定性,将膜置于80 oC的1M KOH溶液中保持720个小时,测试其在30 oC的传导率变化。可以看出该阴离子交换膜具有较好的耐碱稳定性,720个小时后电导率依旧保持在84%以上,此外,ASD-PAEK-0.7的拉伸强度下降了28.8 %。
综上所述,本发明提供的一种燃料电池用N-螺环季铵盐官能化聚芳醚酮阴离子交换膜及其制备方法。该阴离子交换膜由含有不同比例的烯丙基侧链的聚芳醚酮为高分子基体,制备了高耐碱的8-(烯丙氧基)-5-氮杂-螺[4.5]癸烷(AL-ASD)离子液体为活性集团,制备而成的一种聚芳醚酮阴离子交换膜材料。该阴离子交换膜是一种具有高耐碱稳定性、良好的力学强度、柔韧性能和较高的尺寸稳定性的材料。
以上实施例的说明只是用于帮助理解本发明的方法及其核心思想,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以对本发明进行若干改进和修饰,这些改进和修饰也落入本发明权利要求的保护范围内。
Claims (5)
1.燃料电池用N-螺环季铵盐官能化聚芳醚酮阴离子交换膜,其特征在于,包括步骤:
A、首先制备不同比例含有不饱和双键结构的聚芳醚酮(PAEK);所述含有不同比例不饱和双键结构的聚芳醚酮的制备方法为:分别将有机单体双酚AF、4,4'-二氟二苯甲酮和2,2'-二烯丙基双酚A分别以摩尔比0.4:1:0.6,0.3:1:0.7,0.2:1:0.8和0.1:1:0.9的比例溶于环丁砜溶剂中,加入1-2倍摩尔比例的无水碳酸钾,在机械搅拌和氮气保护下,通过芳香族亲核取代反应合成聚芳醚酮主链;
B、然后制备N-螺环季铵盐离子液体;所述N-螺环季铵盐离子液体的制备方法为:将1,4-二溴丁烷和无水碳酸钾的乙醇溶液加热至回流,搅拌并滴加等摩尔4-羟基哌啶的乙醇溶液,保持回流24小时;将获得的8-羟基-5-氮杂-螺[4.5]癸烷(OH-ASD)在过量甲基叔丁基醚中沉淀;烘干后,将8-羟基-5-氮杂-螺[4.5]癸烷溶解在无水二甲基亚砜(DMSO)中,加入1.5倍摩尔氢化钠反应6h-8h后,加入等摩尔3-溴丙烯反应2h-4h,即可获得N-螺环季铵盐离子液体,在过量甲苯中沉淀;
C、N-螺环季铵盐官能化聚芳醚酮阴离子交换膜的制备;所述N-螺环季铵盐官能化聚芳醚酮阴离子交换膜的制备方法为:将上述步骤获得的聚芳醚酮和N-螺环季铵盐溶解在N-甲基吡咯烷酮中搅拌12h,加入过氧化苯甲酰;将产物在乙醇中析出、干燥;并在N-甲基吡咯烷酮溶剂中溶解,采用流延法成膜。
2.根据权利要求1所述的燃料电池用N-螺环季铵盐官能化聚芳醚酮阴离子交换膜的制备方法,其特征在于,包括如下:
步骤一:分别将有机单体双酚AF、4,4'-二氟二苯甲酮和2,2'-二烯丙基双酚A分别以摩尔比0.4:1:0.6,0.3:1:0.7,0.2:1:0.8和0.1:1:0.9的比例溶于环丁砜溶剂中,加入1-2倍摩尔比例的无水碳酸钾,在机械搅拌和氮气保护下,通过芳香族亲核取代反应合成聚芳醚酮主链;
步骤二:将1,4-二溴丁烷和无水碳酸钾的乙醇溶液加热至回流,搅拌并滴加等摩尔4-羟基哌啶的乙醇溶液,保持回流24小时;将获得的8-羟基-5-氮杂-螺[4.5]癸烷(OH-ASD)在过量甲基叔丁基醚中沉淀;烘干后,将8-羟基-5-氮杂-螺[4.5]癸烷溶解在无水二甲基亚砜(DMSO)中,加入1.5倍摩尔氢化钠反应6h-8h后,加入等摩尔3-溴丙烯反应2h-4h,即可获得N-螺环季铵盐离子液体,在过量甲苯中沉淀;
步骤三:将上述步骤获得的聚芳醚酮和N-螺环季铵盐溶解在N-甲基吡咯烷酮中搅拌12h,加入过氧化苯甲酰;将产物在乙醇中析出、干燥;并在N-甲基吡咯烷酮溶剂中溶解,采用流延法成膜。
3.根据权利要求2所述的燃料电池用N-螺环季铵盐官能化聚芳醚酮阴离子交换膜的制备方法,其特征在于,所述的聚芳醚酮的制备方法为:
a、4,4'-二氟二苯甲酮、双酚AF和2,2'-二烯丙基双酚A的摩尔比为1:0.3:0.7:首先,将3.4542g2,2'-二烯丙基双酚A、1.6139g双酚AF、3.170g碳酸钾、3.4912g4,4'-二氟二苯甲酮加入到带有机械搅拌器的100mL三口烧瓶中,在氮气保护下加入18mL环丁砜和20mL甲苯溶解均匀;
b、将混合物在120℃-130℃下保持回流4个小时,然后缓慢升温至180℃,直到混合物溶液变得粘稠;
c、然后将产物倒入去离子水中并快速搅拌得到白色固体沉淀;
d、最后,将产物切碎并在蒸馏水中煮沸3-5次,在60℃下真空干燥24小时,产率87%。
4.根据权利要求2所述的燃料电池用N-螺环季铵盐官能化聚芳醚酮阴离子交换膜的制备方法,其特征在于,所述的N-螺环季铵盐的制备方法为:
a、将6.16mL1,4-二溴丁烷和等摩尔无水碳酸钾溶于50mL乙醇中加热至回流,缓慢滴加5.17g4-羟基哌啶的20mL乙醇溶液,保持回流24小时;
b、将获得的8-羟基-5-氮杂-螺[4.5]癸烷(OH-ASD)在过量甲基叔丁基醚中沉淀,并在40℃真空烘箱中干燥24小时;
c、将8-羟基-5-氮杂-螺[4.5]癸烷和氢化钠以摩尔比1:1.5在无水二甲基亚砜中溶解,并在40℃、氮气保护下搅拌6h;
d、然后将等摩尔3-溴丙烯加入上述体系中,继续反应2-4h;
e、最后将混合物倒入过量的甲苯中,析出白色产物,在40℃真空烘箱中干燥24h。
5.根据权利要求2所述的燃料电池用N-螺环季铵盐官能化聚芳醚酮阴离子交换膜的制备方法,其特征在于N-螺环季铵盐官能化聚芳醚酮的制备方法为:将聚芳醚酮中的双键数量和N-螺环季铵盐以摩尔比1:1溶解在N-甲基
吡咯烷酮溶剂中搅拌12h,35℃加入N-螺环季铵盐1.2倍摩尔的过氧化苯甲酰,
12h后在过量乙醇中沉淀。
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