CN1346707A - Fluoric proton exchange resins of polytrifluorostyrenes, synthesizing process and application thereof - Google Patents

Fluoric proton exchange resins of polytrifluorostyrenes, synthesizing process and application thereof Download PDF

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CN1346707A
CN1346707A CN 01132100 CN01132100A CN1346707A CN 1346707 A CN1346707 A CN 1346707A CN 01132100 CN01132100 CN 01132100 CN 01132100 A CN01132100 A CN 01132100A CN 1346707 A CN1346707 A CN 1346707A
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proton exchange
phcf
resin
exchange resins
polytrifluorostyrene
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CN1128679C (en
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吕龙
胡里清
张卫星
李伟
何妍
王毅
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Shanghai Institute of Organic Chemistry of CAS
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Shanghai Institute of Organic Chemistry of CAS
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Abstract

A process for synthesizing a proton exchange resin of polytrifluorestyrene type is disclosed, which is characterized by the copolymerization of three trifluorostyrene monomers with different substituents. It has 200000-2000000 of weight average molecular weight, 100000-500000 of number average molecular weight, 1.5-4.5 of dispersity, and 1.5-3.5 mmolHSo4(-)/g (resin) of ion exchange capacity. It can be used to prepare proton exchange membrane of fuel battery.

Description

Fluoric proton exchange resins of polytrifluorostyrene,, preparation method and use
Technical field
The present invention relates to a kind of novel polytrifluorostyrene, proton exchange resins, synthetic method and the purposes of making the used in proton exchange membrane fuel cell PEM with this resin.
Background technology
In recent decades, coal-fired thermal power generation discharged flue gas and fuel-engined vehicle tail gas have become worldwide environmental problem to the pollution that atmosphere causes, research energy source optimization utilization and clear energy sources exploitation are the important component parts of the 21 century energy and environment strategy of sustainable development, also are the bases of 21 century development of world economy.
Hydrogen Energy has cleaning and inexhaustible advantage and is called as the main flow energy of 21 century.Proton Exchange Membrane Fuel Cells is the splendid device that utilizes hydrogen power generation.It has that operating temperature is low, startup is fast, simple in structure, performance is good, the life-span is long and series of advantages such as non-corrosiveness thereby at small-sized portable power source, and huge potential application foreground is particularly arranged in electric motor car, is the focus of fuel cell studies.The electric motor car of external expectation Proton Exchange Membrane Fuel Cells will be in commercialization in 2008.
PEM is one of core of Proton Exchange Membrane Fuel Cells.That mainly adopt in the world at present is succeeded in developing in 1966 and the business-like Nafion of du pont company The series full fluorin proton exchange film (U.S.Patent:3,282,875[1966]).The full fluorin proton exchange film of Shi Yonging has the Flemion of Japan AGC company development in addition The Aciplex of film and the development of company of Japanese Asahi Chemical Industry Film.More than three kinds of full fluorin proton exchange films all be to make by the perfluor proton exchange resins that contain different long function side chains.Dow chemical company is developed into the Dow that contains shorter function side chain at the beginning of the eighties Full fluorin proton exchange film (U.S.Patent:4,358,412[1982]).Though its performance compares Nafion , Flemion And Aciplex Film is good, but its resin monomer is synthetic more complicated, and cost is more expensive, and too late long side chain film of life-span, and this limits its application prospect.
The resins complexity of full fluorin proton exchange film, the cost height, and be difficult for degraded, therefore there are many companies and research unit developing the fluorine-containing proton exchange resins of part at present in the world in the hope of reducing cost.Canada Ballard company is developed into the fluorine-containing proton exchange resins of part and makes its third generation PEM thus, the resin main component be trifluorostyrene and its derivative copolymer (U.S.Patent:5,422,411[1995]; 5,498,639[1996]; 5,602,185[1997]; 5,684,192[1997]; 5,773,480[1998]).Its advantage of film of making of resinoid is to have higher ion exchange capacity and water content thus, be assembled into fuel cell test and show that its performance is better than full fluorin proton exchange film, but mechanical strength that it is relatively poor and film embrittlement when dehydration all limits its long-time use, and the synthetic cost of resin monomer also is higher.
In addition, some researchers think that the polymer that has aromatic rings on some main chain is suitable for preparing the used in proton exchange membrane fuel cell PEM.For example: polybenzimidazoles phosphoric acid resin, polyether sulfone sulfonate resin, polyether-ether-ketone sulfonate resin and polyphenylene sulfide sulfonate resin etc.But do not see the report that it has The performance test results on Proton Exchange Membrane Fuel Cells mostly.
Reduce the proton exchange film thickness and help improving performance and reduce cost, but the further reduction of the strong mechanical constraints thickness of film.Gore company is developed into Gore-tex at the beginning of the eighties Composite membrane, it is with Nafion Resin is filled in the polytetrafluoroethylporous porous membrane.Though the existence of tetrafluoroethene reduces the proton ability of leading of film, thus its excellent mechanical strength can make film do the thinner water distribution that reduces film resistance, improves film, and cost also reduces greatly.Composite membrane has been studied the focus into current used in proton exchange membrane fuel cell PEM research.Ballard company also studies its resin is filled in and prepares composite membrane (U.S.Patent:5,985,942[1999]) in the polytetrafluoroethylporous porous membrane.
More than various used in proton exchange membrane fuel cell PEMs remove Nafion Film does not all have commercialization outward.The research appropriate resin also reduces cost and improves filming technology and still continuing with the research that adapts to large-scale application.Lv Long etc. the invention provides possibility with " fluorine-containing trifluorostyrene monomer, preparation method and use " patent of invention that the present invention applies on the same day for finishing.
Goal of the invention
The object of the invention provides low but the novel polytrifluorostyrene, proton exchange resins that performance is good of a kind of cost of used in proton exchange membrane fuel cell.
Another purpose of the present invention provides a kind of synthetic method of above-mentioned novel fluoric proton exchange resins of polytrifluorostyrene.
The object of the invention also provides a kind of purposes of developing with above-mentioned resins ionic exchange film for fuel cell.
Summary of the invention
The invention provides a kind of novel polytrifluorostyrene, proton exchange resins.This resin system is formed by the trifluorostyrene monomer polymerization of three kinds of different structures.From the trifluorostyrene monomer, through monomer polymerization, polymer sulfonation, hydrolysis and H +Exchange has made the fluoric proton exchange resins of polytrifluorostyrene, with following structure, and its structural formula is as follows: R wherein f 1=H or C yF 2y+1, y=1,2,3,4,5 or 6 is as H, CF 3, C 2F 5, C 3F 7, C 4F 9, C 5F 11Or C 6F 13Deng; R f 2=(CF 2CF 2) nOCF 2CF 2SO 3H, n=1,2,3 or 4 is as CF 2CF 2OCF 2CF 2SO 3H, (CF 2CF 2) 2OCF 2CF 2SO 3H, (CF 2CF 2) 3OCF 2CF 2SO 3H or (CF 2CF 2) 4OCF 2CF 2SO 3H etc.; M: p: q=39.2～7.2: 9.8～1.8: 1.
The proton exchange resins preparation process is as follows:
1. monomer is synthetic
1) trifluorostyrene monomer (TFS) is synthetic
Trifluoro bromine ethene from being easy to get is translated into zincon CF 2=CFZnBr, iodobenzene and CF under the effect of catalyst and co-catalyst 2Coupling reaction takes place in=CFZnBr, makes trifluorostyrene monomer PhCF=CF 2(TFS).Wherein catalyst and co-catalyst can be Pd (dba) 3/ Ph 3P, Pd (OAc) 2/ Ph 3P, PdCl 2/ Ph 3P, Pd (dba) 3/ POPh 3, Pd (OAc) 2/ POPh 3And PdCl 2/ POPh 3Deng, dba=two inferior Bian benzylacetone bases, OAc=acetoxy group.
2) m-fluoroalkyl trifluorostyrene monomer (-C yF 2y+1-PhCF=CF 2, y=1,2,3,4,5,6) synthetic
From iodobenzene, under the effect of copper powder, with IC yF 2y+1(y=1,2,3,4,5,6) reaction obtains corresponding fluoroalkyl benzene, again through nitrated, and reduction, diazotising and iodate, obtain corresponding m-fluoroalkyl iodobenzene, under the effect of catalyst and co-catalyst, carrying out coupling reaction then, obtain corresponding m-fluoroalkyl trifluorostyrene monomer (m-C with the trifluoro vinyl zincon yF 2y+1-PhCF=CF 2).
3) position (CF between 2CF 2) nCF 2CF 2SO 2Synthesizing of the trifluorostyrene monomer that F replaces
From iodobenzene, under the effect of copper powder, with I (CF 2CF 2) nCF 2CF 2SO 2F (n=1,2,3,4) reaction obtains corresponding fluoroalkyl benzene, again through nitrated, and reduction, diazotising, position (CF between iodate obtains accordingly 2CF 2) nCF 2CF 2SO 2The trifluoroalkyl iodobenzene that F replaces carries out coupling reaction with the trifluoro vinyl zincon then under the effect of catalyst and co-catalyst, obtain corresponding between the trifluorostyrene monomer m-(CF that replaces of position 2CF 2) nCF 2CF 2SO 2FPhCF=CF 2
2. the polymerization of monomer
Select emulsion polymerization systems for use, adopt trifluorostyrene (PhCF=CF 2), m-R f 1PhCF=CF 2And m-R f 2PhCF=CF 2Between the trifluorostyrene derivative carry out radical polymerization as polymerization single polymerization monomer, polymerization is preferably under the nitrogen protection to be carried out.Above-mentioned monomer PhCF=CF 2, m-R f 1PhCF=CF 2And m-R f 2PhCF=CF 2Mol ratio be followed successively by 39.2～7.2: 9.8～1.8: 1.Polymeric reaction temperature is 30～70 ℃; Polymerization reaction time is 40～100 hours; Initator is a potassium peroxydisulfate, itself and PhCF=CF 2Mol ratio be 2～5: 1000; Emulsifying agent is n-C 12H 25NH 2Cl, itself and PhCF=CF 2Mol ratio be 1: 6～14.R wherein f 1=H or C yF 2y+1, y=1,2,3,4,5 or 6; R f 2=(CF 2CF 2) nOCF 2CF 2SO 3H, n=1,2,3 or 4.
3. the sulfonation of polymer
Polymer is dissolved in the carrene, and the mixed solution that adds the carrene of triethyl phosphate and sulfur trioxide under vigorous stirring carries out the sulfonic acid reaction.By hydrolysis, acidifying promptly makes proton exchange resins.The ion exchange capacity of polymer also can by control during sulfonation the amount of sulfonation of sulfur trioxide control.In the sulfonating reaction, above-mentioned polymer is with its TFS that contains metering, and the mol ratio of TFS, triethyl phosphate and sulfur trioxide is 8～16: 1: 4,30 minutes～1.5 hours sulfonation time, the sulfonating reaction temperature was 30～60 ℃.
4. the hydrolysis of sulfonated polymer
Sulfonated polymer hydrolysis in the oxyhydroxide aqueous solution of 10～50% monovalence metal obtains the monovalent metallic ion exchanger resin.60～80 ℃ of hydrolysis temperatures, hydrolysis 4～8 hours.Described monovalence metal can be Li, Na, K etc.This resinoid all can carry out H with sulfuric acid +Exchange system gets proton exchange resins.
5. the H of sulfonated polymer +Exchange
Above-mentioned ion exchange resin after the hydrolysis is placed on the H of 0.5～10mol/L_ 2SO 4Carry out H +Exchange 15～30 hours.Promptly make proton exchange resins.
Proton exchange resins of the present invention can prepare PEM with following two kinds of methods preparation: The tape casting prepares single film and the decompression completion method prepares composite membrane.
1. The tape casting prepares single film
Novel proton exchange resins of the present invention is made into 20～60% solution in organic solvent, and with this solution curtain coating on the casting film-forming platform, temperature is controlled at 30～80 ℃.After equal solvent is evaporated completely, water spray, skinning promptly makes single film.
2. the decompression completion method prepares composite membrane
In an airtight container, contain concentration and be the organic solvent solution of 5% above-mentioned novel proton exchange resins, with thickness is that 20～70 microns ptfe porous membrane is tied up on the support ring made from polytetrafluoroethylene (PTFE), be put in the solution then, pad upper glass thin slice makes poly tetrafluoroethylene not reach liquid level well below.Vavuum pump maintains absolute pressure 30～100mmHg with the airtight container internal pressure, rocks airtight container gently support ring is drawn down from sheet glass, thereby film is immersed in the solution.It is transparent that film becomes soon.Return to normal pressure, soaked 1 hour, take out airing then.
Above-mentioned organic solvent can be methyl alcohol, toluene, oxolane (THF), N, and dinethylformamide (DMF), N are in N-dimethylacetylamide (DMAc) and N-methyl pyrrolidone (DMP) equal solvent
This method can be relatively easy to prepare the novel polytrifluorostyrene, proton exchange resins of various performance differences.The fluorine-containing carbon-chain structure of novel polytrifluorostyrene resin itself has determined it that good heat endurance, chemical inertness and good mechanical performance are arranged, and comprises tensile strength and tearing strength.Simultaneously its have and Nafion Functionalization (the CF that resin is similar 2CF 2) nOCF 2CF 2SO 2The F side chain makes it have the lead proton ability better than polytrifluorostyrene, has further improved the crystallinity of polymer simultaneously.Because sulfate resin in organic solvent, have good dissolving ability, but this makes this resin curtain coating make single film; Also its solution can be soaked porous membrane and make composite membrane.
Description of drawings
Accompanying drawing 1 is the polarization curve of the monocell that is assembled into by single film, curve corresponding SP respectively among the figure 3, SP 81And SP 131The single film of resins; Accompanying drawing 2 is by SP 81The polarization curve of the monocell that the composite membrane of resins is assembled into.Polarization curve can illustrate the chemical property of this type of resin.The ordinate of polarization curve is the voltage of monocell, and unit is a volt (V); Abscissa is the current density of monocell, and unit is every square centimeter of (A/cm of ampere 2).The test condition of monocell is: battery temperature=75 ℃; Hydrogen inlet pressure=0.10MPa, air intake pressure=0.12MPa.
Specific implementation method
Following embodiment will the present invention is described in further detail, but the invention is not restricted to these instantiations.Example 1-6 has described the preparation of various monomers; Example 7-14 has described the preparation and the sulfonation of various polymer; Example 15-16 has described the hydrolysis and the H of sulfonated polymer +Exchange; Example 17-19 has described preparation and the test of fuel cell with composite membrane and three-in-one electrode.
Synthesizing of embodiment 1 trifluorostyrene monomer
Logical nitrogen added 4.8kg DMF after 30 minutes in the reaction bulb of 10L, continued logical nitrogen 30 minutes, under agitation added the 645g zinc powder.After water-bath is heated to 50 ℃, feed BrCF=CF 2, exceed approximately 4 hours consuming time to become to drip speed.The cooling reactant liquor adds 48g Ph to room temperature 3P and 33g Pd 2(dba) 3, be stirred and heated to 55 ℃, stop heating, add iodobenzene in batches, first adds 300g, adds when the reaction intensification cools to 60 ℃ again one by one later on, adds in about 2 hours.Reaction temperature is controlled at 60 ℃, and stirring is spent the night.Decompression steams monomer and part DMF then, and the frozen water that adds equivalent shakes up to steaming liquid, layering, and layer oily matter is PhCF=CF 2Monomer, decompression steams the trifluorostyrene monomer, productive rate 80%, GC purity 99% again.
Embodiment 2 Ph (CF 2CF 2) 3OCF 2CF 2SO 2F's is synthetic
In one liter three-necked bottle, logical nitrogen 1 hour.Add 1.5kg DMF, 384g copper, 939g I (CF under the mechanical agitation 2CF 2) 3OCF 2CF 2SO 2F, 306g C 6H 5I, 120 ℃ add hot reflux and stirred 24 hours.Filtering reacting liquid, extracted with diethyl ether residual solids, merging filtrate.Take out DMF and other assorted liquid with the water pump decompression under 50 ℃.Collect product about 100 ℃, output 626g, productive rate 72%, purity 98%.
3-NO of embodiment 2-Ph (CF 2CF 2) 3OCF 2CF 2SO 2F's is synthetic
In one liter three-necked bottle, add 137.6g Ph (CF 2CF 2) 3OCF 2CF 2SO 2F, ice-water bath, the nitration mixture of the concentrated sulfuric acid of the fuming nitric aicd of adding 19ml and 40ml under the mechanical agitation.The control reaction temperature is at 45 ℃.After reaction in second day finishes, reactant liquor is poured in the frozen water, the extracted with diethyl ether organic layer is used NaHCO 3Solution is washed till neutrality, uses anhydrous MgSO again 4Drying, decompression at last steams product, output 134g, productive rate 90%.
4-NH of embodiment 2-Ph (CF 2CF 2) 3OCF 2CF 2SO 2F's is synthetic
In the three-necked bottle of 250ml, add 41g SnCl 22H 2The dense HCl of O and 37ml added in 15 minutes between 25g-NO 2-Ph (CF 2CF 2) 3OCF 2CF 2SO 2F, 70 ℃ were reacted 1 hour down, then cool overnight.Filtering reacting liquid, filtrate neutralizes with NaOH solution, extracted with diethyl ether, decompression steams product, output 19.8g, productive rate 84%.
5-I-Ph of embodiment (CF 2CF 2) 3OCF 2CF 2SO 2F's is synthetic
Between in the three-necked bottle of 500ml, adding-NH 2-Ph (CF 2CF 2) 3OCF 2CF 2SO 2The dense HCl salify of F and 10ml splashes into 3g NaNO under the ice bath cooling mechanical agitation 2Saturated solution adds 6.6g KI saturated solution, vigorous stirring 1 hour after half an hour.Add ether and tell organic layer, use NaHCO 3The solution neutralization, dry back decompression distillation goes out product, output 13g, productive rate 55%.
6-(CF of embodiment 2CF 2) 3OCF 2CF 2SO 2F-PhCF=CF 2Synthetic
Logical nitrogen is 30 minutes in the reaction bulb of 250mL, adds 80ml DMF then, continues logical nitrogen 30 minutes, under agitation adds 25g CF 2=CFZnBr, 0.32g Ph 3P and 0.22g Pd 2(dba) 3, be stirred and heated to 55 ℃, between adding 10g-I-Ph (CF 2CF 2) 3OCF 2CF 2SO 2F, stirring is spent the night.Decompression steams monomer and part DMF, and the frozen water that adds equivalent shakes up layering to steaming liquid.Layer oily matter is the TFS monomer.Again between decompression steams-(CF 2CF 2) 3OCF 2CF 2SO 2The F-PhCF=CF monomer, output 4.2g, productive rate 45%.
Embodiment 7 PhCF=CF 2, m-CF 3-PhCF=CF 2With
M-(CF 2CF 2) 3OCF 2CF 2SO 2F-PhCF=CF 2Polymerization
The 3L there-necked flask leads to N 230 minutes, add 1050ml water and 19g n-C then 12H 25NH 2The Cl emulsifying agent continued logical nitrogen 1 hour; Be heated to 50 ℃, the constant temperature electromagnetic agitation; Take by weighing 119g PhCF=CF 2, 43gm-CF 3-PhCF=CF 2M-(CF with 30g 2CF 2) 3OCF 2CF 2SO 2F-PhCF=CF 2(ratio of ternary system can be regulated) adds in the flask, adds the 1.45g initiator potassium persulfate at last, reacts 72 hours; Product after the polymerization is poured in the sodium hydroxide solution, and mechanical agitation is carried out breakdown of emulsion, approximately needs 10-15 minute; The Buchner funnel filtering solution is washed till neutrality with distilled water with product earlier, uses residual water of washed with methanol and low molecular weight substance then, drains; 60 ℃ of bakings of vacuum drying oven 24 hours get end product.Polymerization yield rate is more than 88.9%.Resin is numbered NS-P 8Its inherent viscosity aη=1.336, weight average molecular weight Mw=23.3 ten thousand, and number-average molecular weight Mn=11.5 ten thousand; Coefficient of dispersion D=M W/ M η=2.03.
Regulate PhCF=CF 2And m-CF 3-PhCF=CF 2The Different Weight ratio, polymerization results as shown in Table 1:
Table one, PhCF=CF 2, m-CF 3-PhCF=CF 2And m-(CF 2CF 2) 3OCF 2CF 2SO 2F-PhCF=CF 2
The reaction result table of polymerisation
Numbering eM 1: M 2The production and productivity nuclear-magnetism aη molecular weight (* 10 -5)
(w/w) (g) (TFS∶m-
TFS) bMw cMn dD
NS-P 3?119∶43 - - 3.8∶1 0.625 3.81 1.15 3.31
NS-P 4?80∶29 82 75.2％ 4.23∶1?0.784 5.21 1.76 2.96
NS-P 5?119∶43 139 85.8％ 3.53∶1?1.067 11.35 3.09 3.67
NS-P 6?99∶36 120 88.9％ - 1.220 - - -
NS-P 7?119∶43 141 87.0％ 4.97∶1?1.114 2.00 0.84 2.39
NS-P 9 119∶43 138 85.2％ 3.75∶1 1.556 2.29 1.12 2.06
NS-P 11 119∶43 129 79.6％ 7.9∶1 1.676 2.05 1.05 1.94
NS-P 12 119∶43 146 90.1％ 4.06∶1 1.490 13.71?4.20 3.27
NS-P 13 119∶43 146 90.1％ 3.57∶1 1.597 17.31?4.85 3.57
NS-P 14 119∶43 142 87.7％ 4.43∶1 1.867 18.43?4.98 3.71
NS-P 154.02a, polymerizate were dissolved in the toluene in 92: 33 123 99% 3.9: 1 14.47 3.60,30 ℃ of waters bath with thermostatic control; B, Mw are weight average molecular weight; C, Mn are number-average molecular weights; D, D are that the coefficient of dispersion is M W/ M nE,
Figure A0113210000111
Embodiment 8 PhCF=CF 2, m-CF 3-PhCF=CF 2With
M-(CF 2CF 2) 3OCF 2CF 2SO 2F-PhCF=CF 2The sulfonation of polymerizate
At first with 15g NS-P 8Polymer is dissolved in the 130ml carrene, joins stirring and dissolving in the sulfonation reactor; Under vigorous stirring, add 10g triethyl phosphate, the mixed solution of 8.7ml sulfur trioxide and 22ml carrene, SO 3With the mol ratio of TFS in the polymer be 2: 1; Added in about 5 minutes, added hot reflux then 1 hour; Filter,, wash to neutral with the deionization frozen water at last with the washing of 100ml chloroform; The sulfonated products kept dry, the sulfonation productive rate is greater than 90%.Ion exchange capacity of resin is 2.1mmol HSO 4 +/ (g resin), moisture content is 70%.Sulfate resin is numbered S-P 81
Regulate SO 3And PhCF=CF 2Ratio, sulfonating reaction result as shown in Table 2:
Table two, PhCF=CF 2, m-CF 3-PhCF=CF 2And m-(CF 2CF 2) 3OCF 2CF 2SO 2F-PhCF=CF 2
The sulfonation of polymerizate is table as a result
Polymer η TFS: numbering polymerization SO 3: produce ion and hand over moisture content
The m-thing is thrown the TFS amount and is changed capacity
TFS measures mmolHSO
4 +/ (g tree
Fat)
NS-P 3 0.625 3.8∶1 S-P 3 75g 2.5∶1 110 2.38 59～66％
NS-P 4 0.784 4.23∶1 S-P 4 75g 2.47∶1 104 2.35 65～72％
NS-P 5?1.067 3.53∶1 S-P 51 130g 2.45∶1 - 2.92 56～66％
NS-P 7?1.114 4.97∶1 S-P 71 15g 2∶1 16.7 2.72 42～48％
S-P 72 15g 2.5∶1 17.7 2.93 83～87％
NS-P 9?1.556 3.75∶1 S-P 91 15g 1.8∶1 15.8 1.80 29～34％
S-P 92 15g 2∶1 18.2 2.07 40～47％
S-P 93 15g 2.5∶1 17.8 1.90 28～32％
S-P 94 15g 3.5∶1 19g 2.36 51～53％
NS-P 12?1.49 4.06∶1 S-P 121?15g 2∶1 15.8 1.96 63～104％
S-P 122?15g 2.5∶1 18g 2.23 88～122％
S-P 123?15g 3∶1 18.8 2.37 120％
NS-P 13?1.597?3.57∶1 S-P 131?15g 2∶1 16.6 2.15 58％
S-P 132?15g 2.5∶1 17.2 2.38 101％
S-P 133?15g 3∶1 17.3 2.33 77～83％
NS-P 14?1.878?4.43∶1 S-P 141?15g 3∶1
S-P 142?15g 2.5∶1 16.5 1.86 13-17％
Embodiment 9 PhCF=CF 2, m-CF 3-PhCF=CF 2With
M-CF 2CF 2OCF 2CF 2SO 2F-PhCF=CF 2Polymerisation
Experimentation shown in embodiment 7 and reaction condition are with m-CF 2CF 2OCF 2CF 2SO 2F-PhCF=CF 2Replace m-(CF 2CF 2) 3OCF 2CF 2SO 2F-PhCF=CF 2Carry out polymerisation.Polymerization yield rate is 90%.Resin properties viscosities il=1.216, weight average molecular weight Mw=20.1 ten thousand, and number-average molecular weight Mn=10.2 ten thousand; Coefficient of dispersion D=M W/ M n=1.97.
Embodiment 10 PhCF=CF 2, m-CF 3-PhCF=CF 2With
M-CF 2CF 2OCF 2CF 2SO 2F-PhCF=CF 2Sulfonating reaction
Experimentation shown in embodiment 8 and reaction condition carry out sulfonating reaction, SO 3With the mol ratio of TFS in the polymer be 2: 1.The sulfonation productive rate is greater than 90%.Ion exchange capacity of resin is 2.25mmol HSO 4 +/ (g resin), moisture content is 78%.
Embodiment 11 PhCF=CF 2, m-C 6F 13-PhCF=CF 2With
M-(CF 2CF 2) 3OCF 2CF 2SO 2F-PhCF=CF 2Polymerisation
Experimentation shown in embodiment 7 and reaction condition are with m-C 6F 13-PhCF=CF 2Replace m-CF 3-PhCF=CF 2Carry out polymerisation.Polymerization yield rate is more than 82%.Resin properties viscosities il=1.523, weight average molecular weight Mw=27.2 ten thousand, and number-average molecular weight Mn=13.1 ten thousand; Coefficient of dispersion D=M W/ M n=2.07.
Embodiment 12 PhCF=CF 2, m-C 6F 13-PhCF=CF 2With
M-(CF 2CF 2) 3OCF 2CF 2SO 2F-PhCF=CF 2Sulfonating reaction
Experimentation shown in embodiment 8 and reaction condition carry out sulfonating reaction, SO 3With the mol ratio of TFS in the polymer be 2: 1.The sulfonation productive rate is greater than 90%.Ion exchange capacity of resin is 2.21mmol HSO 4 +/ (g resin), moisture content is 75%.
Embodiment 13 PhCF=CF 2, m-C 6F 13-PhCF=CF 2With
M-CF 2CF 2OCF 2CF 2SO 2F-PhCF=CF 2Polymerisation
Experimentation shown in embodiment 7 and reaction condition are with m-C 6F 13-PhCF=CF 2Replace m-CF 3-PhCF=CF 2, with m-CF 2CF 2OCF 2CF 2SO 2F-PhCF=CF 2Replace m-(CF 2CF 2) 3OCF 2CF 2SO 2F-PhCF=CF 2Carry out polymerisation.Polymerization yield rate is more than 86%.Resin properties viscosities il=1.301, weight average molecular weight Mw=22.5 ten thousand, and number-average molecular weight Mn=10.7 ten thousand; Coefficient of dispersion D=M W/ M n=2.10.
Embodiment 14 PhCF=CF 2, m-C 6F 13-PhCF=CF 2With
M-CF 2CF 2OCF 2CF 2SO 2F-PhCF=CF 2Sulfonating reaction
Experimentation shown in embodiment 8 and reaction condition carry out sulfonating reaction, SO 3With the mol ratio of TFS in the polymer be 2: 1.The sulfonation productive rate is greater than 90%.Ion exchange capacity of resin is 2.14mmol HSO 4 +/ (g resin), moisture content is 69%.
The hydrolysis of embodiment 15 sulfonated polymers
With 10g sulfonated polymer S-P 81Join in 20～40% NaOH or the KOH solution hydrolysis 6 hours, and obtained sodium or potassium ion exchanger resin, 60～70 ℃ of hydrolysis temperatures.
The H of embodiment 16 sulfonated polymers +Exchange
Ion exchange resin after embodiment 15 hydrolysis is placed on the H of 1～6mol/L 2SO 4Carry out H +Exchange 24 hours, promptly make proton exchange resins.
Embodiment 17 The tape casting prepare single film
The novel proton exchange resins of embodiment 16 is made into 20% DMF solution, and with this solution curtain coating on the casting film-forming platform, temperature is controlled at 50 ℃.After equal solvent is evaporated completely, water spray, skinning.About 30～50 microns of film thickness.
Embodiment 18 decompression completion methods prepare composite membrane
In an airtight container, contain concentration that the proton exchange resins with embodiment 16 is made into and be 5% methanol solution.With thickness is that 20～30 microns ptfe porous membrane is tied up on the support ring made from polytetrafluoroethylene (PTFE), is put into then in the solution, and pad upper glass thin slice makes poly tetrafluoroethylene not reach liquid level well below.Vavuum pump maintains absolute pressure 50mmHg with the airtight container internal pressure, rocks airtight container gently support ring is drawn down from sheet glass, thereby film is immersed in the solution.It is transparent that film becomes soon.Return to normal pressure, soaked 1 hour, take out airing then.About 30～50 microns of film thickness.
Embodiment 19 electrode preparation and performance test
1. PEM (single film and composite membrane) preliminary treatment
Film is placed in 10% the HCl solution and soaks more than 4 hours, in deionized water, soaked 2 hours again, then at 60 ℃ 10% HNO 3Soak half an hour in the solution, spend deionised water at last to neutral.
2. three-in-one electrode compacting
Pretreated PEM is clipped in two carbon papers that scribble catalyst, and (Shenli Science and Technology Co Ltd, Shanghai provides, and area is 44.9cm 2) in the middle of, at 110 ℃ and 1.4 * 10 3N/cm 2Under suppress and made three-in-one electrode in 2 minutes.It is added upper side frame and be assembled into monocell test.
3. battery testing
The test condition of monocell is:
Battery temperature=75 ℃; Hydrogen inlet pressure=0.10MPa, air intake pressure=0.12MPa.
The result shows that PEM performance in fuel cell that the proton exchange resins of development is made shows good, with low cost.

Claims (7)

1, a kind of novel polytrifluorostyrene, proton exchange resins of following macromolecular structure formula:
Figure A0113210000021
R wherein f 1=H or C yF 2y+1, R f 2=(CF 2CF 2) nOCF 2CF 2SO 3H, y=1,2,3,4,5 or 6, n=1,2,3 or 4, m: p: q=39.2～7.2: 9.8～1.8: 1.
2, novel polytrifluorostyrene, proton exchange resins as claimed in claim 1 is characterized in that described resin contains the 3rd monomer that following structural formula is represented, its molar content is 2～10%: R wherein f=(CF 2CF 2) nOCF 2CF 2SO 2F, n=1,2,3 or 4.
3, novel polytrifluorostyrene, proton exchange resins as claimed in claim 1, the number-average molecular weight that it is characterized in that described resin is 200,000～2,000,000.
4, novel polytrifluorostyrene, proton exchange resins as claimed in claim 1, the ion exchange capacity that it is characterized in that described resin is 1.5～3.5mmol HSO 4 +/ (g resin).
5, novel polytrifluorostyrene, proton exchange resins as claimed in claim 1, the ion exchange capacity that it is characterized in that described resin is 2.2～2.5mmol HSO 4 +/ (g resin).
6, the synthetic method of novel polytrifluorostyrene, proton exchange resins as claimed in claim 1 is characterized in that by following prepared in reaction:
1) polymerization of monomer
In the presence of initator and emulsifying agent, carry out radical polymerization, adopt PhCF=CF 2, R f 1PhCF=CF 2And R f 2PhCF=CF 2As polymerization single polymerization monomer, the mol ratio of above-mentioned monomer is 39.2～7.2: 9.8～1.8: 1; Polymeric reaction temperature is 30～70 ℃; Polymerization reaction time is 40～100 hours; Described initator is a potassium peroxydisulfate, and the mol ratio of itself and trifluorostyrene is 2～5: 1000; Emulsifying agent is n-C 12H 25NH 2Cl, the mol ratio of itself and trifluorostyrene is 1: 6～14, y=1,2,3,4,5 or 6 wherein, n=1,2,3 or 4;
2) sulfonation of polymer
Above-mentioned polymer is dissolved in the carrene, under vigorous stirring, add sulfonating agent and carry out the sulfonic acid reaction, sulfonating agent is the mixed solution of triethyl phosphate and sulfur trioxide and carrene, during sulfonating reaction in the polymer TFS, triethyl phosphate and sulfur trioxide mol ratio be 8～16: 1: 4,30 minutes～1.5 hours sulfonation time, the sulfonating reaction temperature is 30～60 ℃;
3) hydrolysis of sulfonated polymer
The hydrolysis in the aqueous solution of 10～50% monovalence metallic hydrogen oxygen compound of above-mentioned sulfonated polymer obtains the monovalent metallic ion exchanger resin, 60～80 ℃ of hydrolysis temperatures, hydrolysis 4～8 hours;
4) H of sulfonated polymer +Exchange
Ion exchange resin after the said hydrolyzed is placed on the H of 0.5～10mol/L_ 2SO 4Carry out H +Exchange 15～30 hours, promptly make proton exchange resins;
7, the purposes of novel polytrifluorostyrene, proton exchange resins as claimed in claim 1 is characterized in that being used to prepare the PEM that fuel cell is used.
CN 01132100 2001-11-02 2001-11-02 Fluoric proton exchange resins of polytrifluorostyrenes, synthesizing process and application thereof Expired - Fee Related CN1128679C (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7737190B2 (en) * 2005-03-24 2010-06-15 E.I. Du Pont De Nemours And Company Process to prepare stable trifluorostyrene containing compounds grafted to base polymers using a solvent/water mixture
US7829603B2 (en) * 2004-05-07 2010-11-09 E.I. Du Pont De Nemours And Company Stable trifluorostyrene containing compounds grafted to base polymers, and their use as polymer electrolyte membranes
CN101759829B (en) * 2008-11-14 2011-09-28 山东东岳高分子材料有限公司 Fluorinion-containing polymer and application of same as proton-exchange fibre material
CN101759830B (en) * 2008-11-14 2011-09-28 山东东岳高分子材料有限公司 Ionic polymer and application thereof as proton exchange membrane
CN101759832B (en) * 2009-11-13 2012-05-09 山东东岳高分子材料有限公司 Main chain perfluoro polymer and application thereof as ion exchange membrane
CN101777656B (en) * 2009-12-07 2012-09-19 山东华夏神舟新材料有限公司 Solid fluorine-containing high polymer proton exchange membrane for fuel cell and preparation method thereof
CN104927225A (en) * 2015-05-06 2015-09-23 苏州高通新材料科技有限公司 High temperature resistant proton exchange membrane based on sulfonated graphene and preparation method therefor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7829603B2 (en) * 2004-05-07 2010-11-09 E.I. Du Pont De Nemours And Company Stable trifluorostyrene containing compounds grafted to base polymers, and their use as polymer electrolyte membranes
US7737190B2 (en) * 2005-03-24 2010-06-15 E.I. Du Pont De Nemours And Company Process to prepare stable trifluorostyrene containing compounds grafted to base polymers using a solvent/water mixture
CN101759829B (en) * 2008-11-14 2011-09-28 山东东岳高分子材料有限公司 Fluorinion-containing polymer and application of same as proton-exchange fibre material
CN101759830B (en) * 2008-11-14 2011-09-28 山东东岳高分子材料有限公司 Ionic polymer and application thereof as proton exchange membrane
CN101759832B (en) * 2009-11-13 2012-05-09 山东东岳高分子材料有限公司 Main chain perfluoro polymer and application thereof as ion exchange membrane
CN101777656B (en) * 2009-12-07 2012-09-19 山东华夏神舟新材料有限公司 Solid fluorine-containing high polymer proton exchange membrane for fuel cell and preparation method thereof
CN104927225A (en) * 2015-05-06 2015-09-23 苏州高通新材料科技有限公司 High temperature resistant proton exchange membrane based on sulfonated graphene and preparation method therefor

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