AU2001264921A1 - Modified sulfonamide polymers - Google Patents
Modified sulfonamide polymersInfo
- Publication number
- AU2001264921A1 AU2001264921A1 AU2001264921A AU2001264921A AU2001264921A1 AU 2001264921 A1 AU2001264921 A1 AU 2001264921A1 AU 2001264921 A AU2001264921 A AU 2001264921A AU 2001264921 A AU2001264921 A AU 2001264921A AU 2001264921 A1 AU2001264921 A1 AU 2001264921A1
- Authority
- AU
- Australia
- Prior art keywords
- membrane
- polymer
- electrophile
- sulfonamide
- sulfonamide polymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229920000642 polymer Polymers 0.000 title claims description 98
- 229940124530 sulfonamide Drugs 0.000 title claims description 92
- 150000003456 sulfonamides Chemical class 0.000 title claims description 66
- 239000012528 membrane Substances 0.000 claims description 104
- 238000000034 method Methods 0.000 claims description 47
- 239000000243 solution Substances 0.000 claims description 42
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 22
- CTKINSOISVBQLD-UHFFFAOYSA-N Glycidol Chemical group OCC1CO1 CTKINSOISVBQLD-UHFFFAOYSA-N 0.000 claims description 19
- 239000012466 permeate Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 12
- 239000012039 electrophile Substances 0.000 claims description 11
- -1 sulfate compound Chemical class 0.000 claims description 11
- 239000002168 alkylating agent Substances 0.000 claims description 10
- 229940100198 alkylating agent Drugs 0.000 claims description 10
- 239000012527 feed solution Substances 0.000 claims description 9
- 150000002924 oxiranes Chemical group 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 6
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical group [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 5
- 125000001424 substituent group Chemical group 0.000 claims description 5
- 125000005420 sulfonamido group Chemical group S(=O)(=O)(N*)* 0.000 claims description 5
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 4
- 239000012465 retentate Substances 0.000 claims description 4
- 230000002378 acidificating effect Effects 0.000 claims description 3
- 150000008049 diazo compounds Chemical class 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 229910052736 halogen Inorganic materials 0.000 claims description 3
- 150000002367 halogens Chemical class 0.000 claims description 3
- 239000012501 chromatography medium Substances 0.000 claims description 2
- 239000003792 electrolyte Substances 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 150000004820 halides Chemical class 0.000 claims 4
- 125000003282 alkyl amino group Chemical group 0.000 claims 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims 2
- 150000008065 acid anhydrides Chemical class 0.000 claims 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims 1
- 230000002152 alkylating effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000002609 medium Substances 0.000 claims 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 26
- 125000000565 sulfonamide group Chemical group 0.000 description 25
- 230000004048 modification Effects 0.000 description 17
- 238000012986 modification Methods 0.000 description 17
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 16
- 239000011159 matrix material Substances 0.000 description 14
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
- 239000002585 base Substances 0.000 description 12
- 229910052757 nitrogen Inorganic materials 0.000 description 12
- 239000007864 aqueous solution Substances 0.000 description 10
- 239000012530 fluid Substances 0.000 description 8
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 8
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 6
- 150000003973 alkyl amines Chemical group 0.000 description 6
- 150000001412 amines Chemical group 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- CNPVJWYWYZMPDS-UHFFFAOYSA-N 2-methyldecane Chemical compound CCCCCCCCC(C)C CNPVJWYWYZMPDS-UHFFFAOYSA-N 0.000 description 5
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- ZBJSGOMTEOPTBH-UHFFFAOYSA-N naphthalene-1,3,6-trisulfonyl chloride Chemical compound ClS(=O)(=O)C1=CC(S(Cl)(=O)=O)=CC2=CC(S(=O)(=O)Cl)=CC=C21 ZBJSGOMTEOPTBH-UHFFFAOYSA-N 0.000 description 5
- 239000010408 film Substances 0.000 description 4
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 4
- PSHKMPUSSFXUIA-UHFFFAOYSA-N n,n-dimethylpyridin-2-amine Chemical compound CN(C)C1=CC=CC=N1 PSHKMPUSSFXUIA-UHFFFAOYSA-N 0.000 description 4
- 238000002791 soaking Methods 0.000 description 4
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 description 4
- 239000012085 test solution Substances 0.000 description 4
- BGJSXRVXTHVRSN-UHFFFAOYSA-N 1,3,5-trioxane Chemical compound C1OCOCO1 BGJSXRVXTHVRSN-UHFFFAOYSA-N 0.000 description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 3
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 3
- 239000001110 calcium chloride Substances 0.000 description 3
- 229910001628 calcium chloride Inorganic materials 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 239000008096 xylene Substances 0.000 description 3
- JKMHFZQWWAIEOD-UHFFFAOYSA-N 2-[4-(2-hydroxyethyl)piperazin-1-yl]ethanesulfonic acid Chemical compound OCC[NH+]1CCN(CCS([O-])(=O)=O)CC1 JKMHFZQWWAIEOD-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- 239000007995 HEPES buffer Substances 0.000 description 2
- 229910019093 NaOCl Inorganic materials 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229960000583 acetic acid Drugs 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000003637 basic solution Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000009920 chelation Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 2
- 239000011976 maleic acid Substances 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 230000000269 nucleophilic effect Effects 0.000 description 2
- 239000012074 organic phase Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 150000003335 secondary amines Chemical class 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- XBTRYWRVOBZSGM-UHFFFAOYSA-N (4-methylphenyl)methanediamine Chemical compound CC1=CC=C(C(N)N)C=C1 XBTRYWRVOBZSGM-UHFFFAOYSA-N 0.000 description 1
- UIMAOHVEKLXJDO-UHFFFAOYSA-N (7,7-dimethyl-3-oxo-4-bicyclo[2.2.1]heptanyl)methanesulfonate;triethylazanium Chemical compound CCN(CC)CC.C1CC2(CS(O)(=O)=O)C(=O)CC1C2(C)C UIMAOHVEKLXJDO-UHFFFAOYSA-N 0.000 description 1
- KUYYOUXQOPCFDK-UHFFFAOYSA-N 2-[1-(2-aminoethoxy)ethoxy]ethanamine Chemical compound NCCOC(C)OCCN KUYYOUXQOPCFDK-UHFFFAOYSA-N 0.000 description 1
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- FLSYKRFCICHDDG-UHFFFAOYSA-N O=CNS(=O)=O Chemical compound O=CNS(=O)=O FLSYKRFCICHDDG-UHFFFAOYSA-N 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 150000001350 alkyl halides Chemical class 0.000 description 1
- 230000029936 alkylation Effects 0.000 description 1
- 238000005804 alkylation reaction Methods 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 239000007853 buffer solution Substances 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 230000005595 deprotonation Effects 0.000 description 1
- 238000010537 deprotonation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 125000003700 epoxy group Chemical class 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000012362 glacial acetic acid Substances 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- 230000026030 halogenation Effects 0.000 description 1
- 238000005658 halogenation reaction Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 150000003141 primary amines Chemical class 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000005588 protonation Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000001384 succinic acid Substances 0.000 description 1
- 150000003461 sulfonyl halides Chemical class 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- MBYLVOKEDDQJDY-UHFFFAOYSA-N tris(2-aminoethyl)amine Chemical compound NCCN(CCN)CCN MBYLVOKEDDQJDY-UHFFFAOYSA-N 0.000 description 1
- ASTWEMOBIXQPPV-UHFFFAOYSA-K trisodium;phosphate;dodecahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].[Na+].[O-]P([O-])([O-])=O ASTWEMOBIXQPPV-UHFFFAOYSA-K 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
Description
MODIFIED SULFONAMIDE POLYMERS
Priority of Invention
This application claims priority to U.S. Provisional Application Number 60/206,373, filed 23 May 2000.
Background of the Invention Sulfonamide polymers are incorporated into a variety of materials and devices. One of the major areas where sulfonamide polymers have been proposed for use is in the field of separations. For example, sulfonamide polymers can be used to prepare semi-permeable membranes, which have been proposed for use in separating solution components. Such membranes are a type of filter able to retain certain substances while transmitting others. The components of the feed fluid that pass through the membrane comprise the "permeate" and those that do not pass through the membrane (i.e., are rejected by the membrane or are held by the membrane) comprise the "retentate". In practice, the permeate, the retentate, or both streams may represent the desired product and may be used as obtained or may be subjected to further processing. In order to be economically viable, the membrane must provide sufficient flux (the rate of permeate flow per unit of membrane area) and separation (the ability of the membrane to retain certain components while transmitting others).
Typically, polysulfonamide membranes are made of polymeric materials having a polymer backbone comprising a plurality of primary sulfonamide groups (-SO2-NH-). Based on their chemical structure,. polysulfonamide membranes might be expected to be stable in the presence of concentrated bases. However, it has been found that even relatively short exposure to elevated pH (e.g. about 10), can cause a polysulfonamide membrane to lose performance. Primary sulfonamide polymers (polymer-SO2-NH-polymer) have an acidic proton on a sulfonamide nitrogen. When exposed to sufficiently basic
solutions this proton is removed and the sulfonamide group becomes negatively charged (as shown in the following scheme). polymer-SO -NH-polymer + OH" -> polymer-SO2-N - polymer
(2) This deprotonation renders many polymeric sulfonamides swellable.
Such swelling often results in a polymer (e.g. a membrane polymer or film) that is mechanically weak and highly susceptible to damage.
Secondary sulfonamide polymers (polymer-SO2-NR-polymer, wherein R is not H), which have been formed, for example, by the reaction of an activated sulfonyl compound and a secondary amine (see for example, R.C. Evers and G.F.L. Ehlers, J Polymer Science, 1967, 5, 1797-1801), are incapable of being deprotonated at the sulfonamide nitrogen by base. As a result, such polymers may not swell when exposed to base.
This stability makes secondary sulfonamide polymers desirable materials, particularly for use in carrying out separations at high pH.
Unfortunately, the number of secondary sulfonamide polymers available for carrying out separations is severely limited by the relatively slow reactivity of many secondary amines under the conditions typically used for preparing sulfonamide polymers. Currently, the lack of base stability limits the use of primary sulfonamide polymers. Additionally, the unavailability of secondary sulfonamide polymers, as well as the difficulty encountered in preparing such polymers, limits their use. Thus, there is currently a need for secondary sulfonamide polymer matrices possessing advantageous properties (e.g. improved base stability, improved transport, improved adsorption, or improved selectivity of binding). There is also a need for improved methods for preparing secondary sulfonamide polymers.
Summary of the Invention It has been discovered that primary sulfonamide polymers can be modified by replacing sulfonamido protons with non hydrogen substituents.
Accordingly, the invention can be used to provide base-stable polysulfonamide
materials (e.g. polysulfonamide membranes), as well as sulfonamide matrices of modified structure. The invention also provides a method for modifying a primary sulfonamide material, the method comprising replacing one or more sulfonamido protons with nonhydrogen substituents. The invention provides a general class of polymer material, and methods to produce them. These materials are sulfonamide matrices prepared by modification of a primary sulfonamide polymer via reaction of its sulfonamide nitrogen.
The methods of the invention can be used to modify matrices of interfacial films, as well as any other matrix incorporating primary sulfonamide bonds.
Thus, the invention provides sulfonamide membranes that exhibit exceptional RO and NF performances and excellent stability to basic conditions. The membranes are prepared by removing a reactive sulfonamide proton and replacing it with a less labile (base stable) species (R), as shown in the following scheme.
Polymer-SO2-NH-Polymer + R-Z ^Polymer-SO2-NR-Polymer (1) where R is the replacement group and Z is a suitable leaving group.
The invention also provides a sulfonamide polymer composite membrane wherein the sulfonamide polymer comprises sulfonyl compound residues having at least two sulfonyl moieties and amine compound residues having at least two amine moieties and at least some of the sulfonyl and amine moieties form sulfonamide groups and wherein the nitrogen amide groups have been converted to a non reactive group. The invention also provides a sulfonamide polymer composite membrane wherein the sulfonamide polymer comprises sulfonyl compound residues having at least two sulfonyl moieties and amine compound residues having at least two amine moieties and at least some of the sulfonyl and amine moieties form sulfonamide groups and wherein at least some of the sulfonamide nitrogen groups have been converted to secondary sulfonamide groups.
These modifications, regardless of their ability to promote base stability, may provide membranes with improved properties due to their impact on surface energy and transport properties, which may beneficially alter passage and/or fouling resistance. Detailed Description of the Invention
Definitions
The term "primary sulfonamide polymer" means a solid-phase polymer matrix comprising one or more sulfonamide groups (-SO2-NH-) in the polymer backbone. Preferably, the primary sulfonamide polymer is not derived (or derivable) from a branched or unbranched polyalkylamine (e.g. polyethyleneimme) having greater than 35 repeating monomeric alkylamine units. More preferably, the primary polysulfonamide polymer is not derived (or derivable) from a branched or unbranched polyalkylamine (e.g. polyethyleneimme) having greater than 25 repeating monomeric alkylamine units. More preferably, the primary sulfonamide polymer is not derived (or derivable) from a branched or unbranched polyalkylamine (e.g. polyethyleneimme) having greater than 10 repeating monomeric alkylamine units. Still more preferably, the primary polysulfonamide polymer is not derived (or derivable) from a branched or unbranched polyalkylamine (e.g. polyethyleneimme) having greater than 5 repeating monomeric alkylamine units. Still more preferably, the primary polysulfonamide polymer is not derived (or derivable) from a branched or unbranched polyalkylamine (e.g. polyethyleneimme) having greater than 3 repeating monomeric alkylamine units; and still more preferably, the primary sulfonamide polymer is not derived (or derivable) from a branched or unbranched polyalkylamine (e.g. polyethyleneimme) having greater than 2 repeating monomeric alkylamine units. The term "secondary sulfonamide polymer" means a solid-phase polymer matrix comprising one or more secondary sulfonamide groups (-SO -NR-, wherein R is not hydrogen) in the polymer backbone. The term "matrix" means a regular, irregular and/or random arrangement of polymer molecules. The molecules may or may not be cross-linked. On a
scale such as would be obtained from SEM, X-Ray or FTNMR, the molecular arrangement may show a physical configuration in three dimensions like those of networks, meshes, arrays, frameworks, scaffoldings, three dimensional nets or three dimensional entanglements of molecules. Usually, the matrix is non-self supporting. The matrix may comprise an article of shape such as a bead or a film. Preferably, the matrix is in the form of a thin film with an average thickness from about 5 nm to about 600 nm, and more preferably about 5 to about 400 nm. In usual practice, the matrix is grossly configured as an ultra thin film or sheet. The polymers of the invention can be used as coatings and in chromatography media, diagnostic media, medical devices, electronic components (e.g. storage media, photoresists, insulators), separation devices, membranes, battery electrolytes, fabric, and the like.
The term "membrane" means a semipermeable material which can be used to separate components of a feed fluid into a permeate that passes through the membrane and a retentate that is rejected or retained by the membrane.
The term "composite membrane" means a composite of a matrix layered or coated on at least one side of a porous support material.
The term "support material" means any substrate onto which the matrix can be applied. The substrate may be porous, or non-porous. Included are semipermeable membranes especially of the micro- and ultrafiltration kind, fabric, filtration materials as well as others.
The term "electophile" is understood in the art and includes compounds which have an atom or group of atoms capable of accepting electrons from an electron rich species and forming a new covalent bond. See for example J.
March, Advanced Organic Chemistry, 4th ed., 1992, John Wiley and Sons, New
York.
The term "alkylating agent" is understood in the art and includes compounds capable of adding a substituted or unsubstituted carbon-linked group to another compound. See for example J. March, Advanced Organic
Chemistry, 4th ed., 1992, John Wiley and Sons, New York.
The term "A value" in the context of the present invention represents the water permeability of a membrane and is represented by the cubic centimeters of permeate water over the square centimeters of membrane area times the seconds at the pressure measured in atmospheres. An A value of 1 is essentially 10"5 cm3 of permeate over the multiplicand of 1 centimeter squared of membrane area times 1 second of performance at a net driving pressure of one atmosphere. In the context of the present invention, A values given herein have the following unit designation: 10"5 cm3/(cm2.sec.atm.) or 10"5 cm/(sec.atm) at 25 °C.
A = permeate volume/(membrane area * time * net driving pressure).
The term "net driving pressure" is equal to the average trans-membrane pressure minus the feed-permeate osmotic pressure difference.
The term "transmission value" means the solute concentration in the permeate divided by the average of the solute concentration in the feed and in the concentrate, expressed as a percentage [i.e. transmission value = permeate/((feed+concentrate)/2), expressed as a percentage]. The concentrate is the fluid that flows completely past, but not through, the membrane. The term "retention value" means, in the context of the present invention, 100% minus the transmission value. The term "passage" or "% Pass" is equivalent to the transmission value. Unless otherwise stated, the retention and transmission values are achieved by passing a 1800 to 2200 ppm solution of the specified solute in Dl water at a pH of 6.5 to 7.5, at 24-26 degrees C, at 221-229 psi transmembrane pressure, at a recovery value of less than 2%, at a Reynolds number of at least 2000 across the membrane, and by collecting permeate samples for permeation analysis between the first and second hour of testing. The term "recovery value" means, in the context of the present invention, the ratio of permeate fluid flow to feed fluid flow, expressed as a percentage. The term "base labile", when referring to a substituent bound to a sulfonamido nitrogen, means that after exposure to a solution consisting of 1%
sodium hydroxide in Dl water for 5 minutes at 25 °C, that less than 10% of the substituents have been removed.
The invention provides an alternate method for preparing secondary sulfonamide polymers, wherein a primary sulfonamide polymer is modified at the sulfonamide nitrogen to provide a secondary sulfonamide polymer.
Preferred primary sulfonamide polymers are prepared from primary amines (e.g. xylene diamine, ethylene diamine) and multifunctional sulfonyl halides.
The modification of the nucleophilic sulfonamide nitrogen can be carried out with nearly any electrophile. Suitable examples include compounds having groups such as, for example, epoxies, sulfates, diazo compounds, acid derivatives (including anhydrides, acid chlorides), halocarbons, carbocations, haloalkanes, halogens (NaOCl, Br2), and the like.
For example, a sulfonamide of the invention can be prepared by treatment of a primary sulfonamide polymer with a basic solution of glycidol. Although not wishing to be bound by theory, it is believed that in this reaction the base (OH") first deprotonates the sulfonamide nitrogen atom, followed by attack of the sulfonamide nitrogen to the epoxide ring of glycidol. As illustrated in Example 2, a primary sulfonamide polymer can be treated with a suitable base (e.g. sodium hydroxide) and an epoxide (e.g. glycidol) to provide a secondary sulfonamide polymer of the invention. Glycidol modified membranes also were found to have a lower water contact angle than the corresponding unmodified membrane. This may potentially decrease fouling of the membrane in many applications. The sulfonamide nitrogen is fairly basic with protonation occurring at low pH. Thus, although only weakly nucleophilic, its reactivity can be maintained at extremely low pH values allowing the acid to be used for enhancing the electrophilicity or leaving group ability of reactants. This property was utilized in Example 3 to convert trioxane into a formaldehyde- derived carbocation. This species is able to react with the sulfonamide nitrogen lone pair generating an N-methoyl sulfonamide. Thus, a primary sulfonamide
polymer can be alkylated under acidic conditions with a suitable aldehyde or ketone, or an equivalent thereof (e.g. trioxane) to provide a secondary sulfonamide polymer of the invention. Acid catalyzed addition may also be successful with epoxides such as glycidol. The epoxide oxygen can be protonated at low pH, increasing the leaving group ability of the bridged oxygen leading either to carbocation formation (SNI), or direct reaction with the sulfonamide (SN2).
Treatment of a sulfonamide membrane with a hypohalite (e.g. sodium hypochlorite) was found to stabilize the membrane, and also, to improve rejection in some cases. Thus, the modifications of primary sulfonamide polymers described herein (e.g. treatment with hypohalite) also can improve other properties (e.g. transport properties) of membranes, as well as pH stability. It is believed that the hypochlorite adds chlorine to the sulfonamide nitrogen. Chlorine addition did not appear to promote general high pH stability, though it is expected to be marginally more stable than unchlorinated samples. As illustrated in Example 10, a primary sulfonamide polymer can be treated with a suitable hypohalite (e.g. sodium hypochlorite) to provide a secondary sulfonamide polymer of the invention.
Although in some cases, all or most (e.g. about 80-90%) of the primary sulfonamide bonds in the primary sulfonamide polymer can be converted to secondary sulfonamide bonds; the invention includes polymers wherein only some (e.g. about 10%, 25%, 35%, or 50%) of the primary sulfonamide bonds in the primary sulfonamide polymer are converted to secondary sulfonamide bonds; as well as polymers wherein a smaller percentage (e.g. about 0.05%, 0.5%, 1%, or 5%) of the of the primary sulfonamide bonds in the primary sulfonamide polymer are converted to secondary sulfonamide bonds. In the latter case the conversion may selectively occur on a surface of the polymer.
If desired, control of time, reactants, and/or application method can be used to limit the location of the modification to specific regions of a polymer matrix. For example, large reagents may be used to modify sulfonamide bonds primarily at the surface of the matrix, as they will be unable to access internal
bonds. This may be beneficial, for example, where an added functionality is meant to maximize or minimize the film's tendency to adsorb components in solution.
Typically, the secondary sulfonamide polymers of the invention are significantly more stable to base than the corresponding primary sulfonamide polymers. For example a preferred secondary sulfonamide polymers of the invention is 2-times more stable at pH 13 than the corresponding primary sulfonamide polymer. A more preferred secondary sulfonamide polymers of the invention is 5 -times more stable at pH 13 than the corresponding primary sulfonamide polymer. An even more preferred secondary sulfonamide polymers of the invention is 10-times more stable at pH 13 than the corresponding primary sulfonamide polymer; and a most preferred secondary sulfonamide polymers of the invention is 25-times more stable at pH 13 than the corresponding primary sulfonamide polymer. When configured as membranes, preferred polymers of the invention exhibit less than a 500% increase in flow after exposure to an aqueous solution at pH 13 for 10 hours at room temperature. More preferred polymers of the invention exhibit less than a 100% increase in flow, and even more preferred polymers of the invention exhibit less than a 50% increase in flow, even more preferred polymers of the invention exhibit less than a 25% increase in flow, the most preferred polymers of the invention exhibit less than a 10% increase in flow.
In addition to altering pH stability, the modifications described herein (e.g. alkylation and halogenation) can alter the physio-chemical properties of the sulfonamide membrane. Examples of physio-chemical properties that can be altered include: charge, cross-link density, free volume, surface energy, and polarity. These changes can impact transport through the membrane, adsorption of solutes to the membrane, or selective binding through chelation. Thus, the modified polymers of the invention may demonstrate improved transport through the membrane, adsorption of solutes to the membrane, or selective binding through chelation, either alone, or in combination with improved pH stability.
In addition to improving the resistance to swelling at high pH, post modification may allow a wide variety of functionalities to be added after the desired matrix has been formed. As a result, previously mentioned properties are allowed, while deleterious effects such functionalities may have had on matrix formation are avoided. Such control may allow membranes with enhanced rejection (dissolved ions and/or dissolved organic compounds), minimized fouling, and improved stability to be realized.
Examples Example 1: Membrane An interfacial membrane was prepared in the following manner. An aqueous solution of triethylaminetetraamine (tech grade 60%, Aldrich Chemical Company, Milwaukee Wisconsin, USA, 1.0% TETA by weight) and dimethylaminopyridine (0.1 %) was poured onto the upper surface of a water wet PES support membrane (Osmonics, Inc, Minnetonka, Minnesota: HW31). This solution was allowed to remain in contact with the support for 3 seconds, after which time the excess fluid was drained and metered with an air knife. An organic solution comprising 1,3,6-naphthalenetrisulfonyl chloride (0.16%) and xylene (10%) in Isopar G® was then poured on top of the metered aqueous solution. This organic solution and the aqueous solution were allowed to remain in contact with each other for 30 seconds before the excess organic solution was drained. The remaining organic solution was then allowed to evaporate at ambient temperature for 45 minutes. The membrane was then tested against a MgSO4 feed to determine performance. After soaking in a sodium hydroxide solution (5% in Dl water) for one hour at ambient temperature, the membrane was retested on the same feed solution.
Example 2: Glvcidol Modification
A solution of glycidol (5% by weight in Dl water), adjusted to pH 12 with sodium hydroxide, was prepared. A membrane was prepared as described in Example 1 and washed separately with methanol, then 2000 ppm CaCl2 (aq), and finally Dl water. The membrane was placed into the glycidol modification
solution for three days at ambient temperature (21-23 °C). The resulting membrane was challenged on a MgSO4 feed solution as described above.
The following table shows membrane performance results after exposure to a sodium hydroxide solution (5% in Dl water) for one hour at ambient temperature, for both modified and unmodified membrane:
Example 3: Membrane Analysis
An interfacial membrane was prepared in the following manner. An aqueous solution of tris(2-aminoethyl)amine (Aldrich Chemical Company, Milwaukee Wisconsin, USA, 1.0% by weight) and dimethylaminopyridine (0.1 %) was poured onto the upper surface of a water wet PES support membrane (Osmonics, Inc, Minnetonka, Minnesota: HW31). This solution was allowed to remain in contact with the support for 15 seconds, after which time the excess fluid was drained and metered with an air knife. An organic solution comprising 1,3,6-naphthalenetrisulfonyl chloride (0.16%) and monoglyme (4.34 %) in Isopar G® was then poured on top of the metered aqueous solution. This organic solution and the aqueous solution were allowed to remain in contact with each other for 60 seconds before the excess organic solution was drained. The remaining organic solution was then allowed to evaporate at ambient temperature for 15 minutes.
To modify the membrane, a solution of glycidol (5% by weight in Dl water), adjusted to pH 12 with sodium hydroxide, was prepared. A membrane was prepared as described in Example 1 and washed with methanol. The
membrane was placed into the glycidol modification solution for three days at ambient temperature (21-23 °C).
In order to investigate the mechanism of increased base stability, the effect of pH on surface chemistry was determined by the use of contact angle titrations. (Whitesides, G.W. et al. Langmuir 1985, 1, 725.) The following series of 0.05M buffer solutions were prepared. Each solution then was used as the test solution to determine membrane contact angle. At least three angles were recorded with each buffer.
pH Compound rams in 500ml of H2O
2.0 Maleic acid 2.902 g
3.0 Tartaric acid 3.752 g
4.0 Succinic acid 2.952 g
5.0 Acetic acid 1.501 g
6.0 Maleic acid 2.902 g
7.0 HEPES 5.958 g
8.0 HEPES 5.958 g
9.0 CAPS 5.533 g
10.0 CAPS 5.533 g
11.0 Triethylamine 2.530 g
12.0 Sodium Phosphate dodecahydrate 9.503g
(All reagents available from Aldrich) HC1 or triethylamine was then added to either lower or raise the solution pH to the desired value.) The unmodified membrane of this example was found to have an average contact angle of 43° ± 3°, for test solutions having apH less than 9; for test solutions having a pH greater than 9, the average contact angle was found to be 34° + 2°. The modified membrane of this example had an average contact angle of 31° ± 3°, which was independent of the pH of the test solution.
Example 4: Membrane
Membrane was prepared as described in Example 1 with the following changes. The amine solution used was ethylene diamine (1% by weight) and NN-dimethylaminopyridine (0.1 % by weight) in Dl water and was dwelled for 1 minute. The organic phase was 1,3,6-naphthalenetrisulfonyl chloride (0.16% by
weight) and xylene (10% by weight) in Isopar G and was left to react for 2 minutes. The organic solvent was allowed to evaporate over a 45 minute time period. The membrane was then run against a MgSO4 feed to determine performance. After soaking in a sodium hydroxide solution (5% in Dl water) for one hour at ambient temperature, the membrane was retested on the same feed solution.
Example 5: Glycidol Modification
A solution of glycidol (5% by weight in Dl water), adjusted to pH 12 with sodium hydroxide, was prepared. A membrane was prepared as described in Example 4 and washed separately with methanol, 2000 ppm CaCl2 (aq) and
Dl water. The membrane was placed into the glycidol modification solution for three days at ambient temperature (21-23 °C). The resulting membrane was challenged on a MgSO4 feed solution as described above. The following table shows membrane performance results for the membranes of
Example 4 and Example 5, after exposure to a sodium hydroxide solution (5% in Dl water) for one hour at ambient temperature.
Example 6: Membrane
Membrane was prepared essentially as described in Example 1 but with the following changes: the amine solution used was l,2-bis(2- aminoethoxy)ethane (also termed l,8-diamino-3,6-dioxaoctane, 2% by weight), dimethylaminopyridine (0.1% by weight) in Dl water which was dwelled for 1 minute. The organic phase was 1,3,6-naphthalenetrisulfonyl chloride (0.16% by
weight) and xylene (10 % by weight) in Isopar G and was left to react for 2 minutes. The organic solvent was allowed to evaporate over a 1 hour time period. The membrane was then tested against a MgSO4 feed to determine performance. After soaking in a sodium hydroxide solution (5% in Dl water) for one hour at ambient temperature, the membrane was retested on the same feed solution.
Example 7: Glycidol Modification
A solution of glycidol (5% by weight in Dl water), adjusted to pH 12 with sodium hydroxide, was prepared. A membrane was prepared as described in Example 6 and washed separately with methanol, 2000 ppm CaCl2 (aq) and Dl water. The membrane was placed into the glycidol modification solution for three days at ambient temperature (21-23 °C). The resulting membrane was challenged on a MgSO4 feed solution as described above. The following table shows membrane performance results for the membranes of Example 6 and Example 7, after exposure to a sodium hydroxide solution (5% in Dl water) for one hour at ambient temperature.
Example 8: Membrane
An interfacial membrane was prepared in the following manner. An aqueous solution of ethylenediamine (1.0% by weight), triethylammonium camphorsulfonate (6.6%) and N,N-dimethylaminopyridine (0.1%) was poured onto the upper surface of a polysulfone support membrane. This solution was
allowed to remain in contact with the support for 30 seconds, after which time the excess fluid was drained and metered with an air knife. An organic solution comprising 1,3,6-naphthalenetrisulfonyl chloride (0.16%) and monoglyme (4.5%) in Isopar G was poured on top of the metered aqueous solution. This organic solution and the aqueous solution were allowed to remain in contact with each other for 60 seconds before the excess organic solution was drained. The resulting membrane was placed in a lab oven at 100°C for 5 minutes. The membrane was then tested against a MgSO4 feed to determine performance. After soaking in a sodium hydroxide solution (10% in Dl water) for one hour at ambient temperature, the membrane was re-tested on the same feed solution.
Example 9: Acid Catalyzed Modification
A solution comprising Trioxane (8.9%), glacial acetic acid (48.2%), formic acid (22.5%), and sulfuric acid (20.4%) was prepared. The membrane of Example 8 was immersed in this solution for 3 hours, then removed and rinsed thoroughly with RO water. The following table shows performance results for the membranes of Example 8 and Example 9, before and after exposure to a sodium hydroxide solution (10%o in Dl water) for one hour at ambient temperature.
Example 10: Hypochlorite Modification
The membrane of Example 8 was tested on a feed of MgSO4 in Dl water. After determining the initial performance, a sufficient amount of 5.25% NaOCl was added to the feed solution to adjust the concentration to 50 ppm at ambient temperature. After 30 minutes of operation on this solution, performance was measured.
All publications, patents, and patent documents are incorporated by reference herein, as though individually incorporated by reference. The invention has been described with reference to various specific and preferred embodiments and techniques. However, it should be understood that many variations and modifications may be made while remaining within the spirit and scope of the invention.
Claims (42)
1. A method for preparing a secondary sulfonamide polymer, the method comprising, replacing one or more sulfonamido protons of a corresponding primary sulfonamide polymer with a substituent other than hydrogen; provided the primary sulfonamide polymer is not derived or derivable from a branched or unbranched polyalkylamine having greater than 35 repeating monomeric alkylamine units.
2. The method of claim 1 wherein the substituent is not base labile.
3. The method of claim 1 wherein the one or more sulfonamido protons are replaced by alkylating one or more sulfonamido nitrogens.
4. The method of claim 1 wherein the one or more sulfonamido protons are replaced by contacting the primary sulfonamide polymer with a suitable electrophile.
5. The method of claim 3 wherein the one or more sulfonamido nitrogens are alkylated by contacting the primary sulfonamide polymer with a suitable base and an alkylating agent.
6. The method of claim 5 wherein the alkylating agent has the formula R-X, wherein R is an organic radical, and X is a suitable leaving group.
7. Then method of claim 6 wherein the leaving group is a halide, sulfonate, sulfate, or nitrogen (N2).
8. The method of claim 6 wherein R is Cr oalkyl, or Ci-Cioalkanoyl.
9. The method of claim 5 wherein the alkylating agent is an epoxide.
10. The method of claim 5 wherein the alkylating agent is glycidol.
11. The method of claim 4 wherein the electrophile is a sulfate compound, a sulfonate compound, a diazo compound, an acid anhydride, or an acid halide, or a halogen donor.
12. The method of claim 4 wherein the electrophile is an epoxide
13. The method of claim 4 wherein the electrophile is glycidol.
14. The method of claim 3 wherein the one or more sulfonamido nitrogens are alkylated under acidic conditions.
15. The method of claim 1 wherein the one or more protons are replaced by contacting the primary sulfonamide polymer with a hypohalite.
16. The method of claim 15 wherein the hypohalite is sodium hypochlorite.
17. The secondary sulfonamide polymer prepared by the method of any one of claims 1-16.
18. A membrane comprising the secondary sulfonamide polymer prepared by the method of any one of claims 1-16.
19. The method of claim 1 wherein the primary sulfonamide polymer is part of a membrane.
20. The method of claim 19 wherein the membrane is an RO or an NF membrane.
21. A method for modifying a primary sulfonamide polymer comprising contacting the polymer with an electrophile; provided the primary sulfonamide polymer is not derived or derivable from a branched or unbranched polyalkylamine having greater than 35 repeating monomeric alkylamine units.
22. The method of claim 21 wherein the electrophile is an alkylating agent.
23. The method of claim 22 wherein the polymer is contacted with a suitable base and the alkylating agent.
24. The method of claim 23 wherein the alkylating agent has the formula R- X, wherein R is an organic radical, and X is a suitable leaving group.
25. Then method of claim 24 wherein the leaving group is a halide, sulfonate, sulfate, or nitrogen (N2).
26. The method of claim 25 wherein R is C \ -C \ oalkyl, or C ι -C ι oalkanoyl.
27. The method of claim 22 wherein the alkylating agent is an epoxide.
28. The method of claim 22 wherein the alkylating agent is glycidol.
29. The method of claim 21 wherein the electrophile is a sulfate compound, a sulfonate compound, a diazo compound, an acid anhydride, or an acid halide, or a halogen donor.
30. The method of claim 21 wherein the electrophile is an epoxide
31. The method of claim 21 wherein the electrophile is glycidol.
32. The method of claim 21 wherein the electrophile is a hypohalite.
33. The method of claim 32 wherein the hypohalite is sodium hypochlorite.
34. The polymeric material prepared by the method of any one of claims 21-33.
35. A membrane comprising the polymeric material prepared by the method of any one of claims 21-33.
36. The method of claim 21 wherein the primary sulfonamide polymer is part of a membrane.
37. The method of claim 36 wherein the membrane is an RO or an NF membrane.
38. A membrane comprising a secondary sulfonamide polymer, wherein the secondary sulfonamide polymer backbone does not comprise polyalkylamine segments having greater than 35 repeating monomeric alkylamine units.
39. The membrane of claim 38, which is a composite membrane.
40. The membrane of claim 39 which is interfacially prepared.
41. A method for separating a basic feed solution into a permeate and a retentate, comprising contacting the solution with a membrane of claim 18 or 35.
42. An article of manufacture comprising a polymer of any one of claims 1- 17 or 21-33 which is a chromatography medium, diagnostic medium, medical device, electronic component, separation device, battery electrolyte, or fabric.
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KR20000012970A (en) | 1998-08-03 | 2000-03-06 | 김효근 | Ph sensing polymer containing sulfonamide group and preparing it |
EP0992277B1 (en) | 1998-10-09 | 2004-04-07 | Saehan Industries, Inc. | Dry semipermeable reverse osmosis membrane and process for preparing the same using saccharides |
DE19919708A1 (en) * | 1999-04-30 | 2001-03-01 | Univ Stuttgart | Gradual alkylation of polymeric amines |
US6837996B2 (en) * | 2000-05-23 | 2005-01-04 | Ge Osmonics, Inc. | Polysulfonamide matrices |
AU2001292542B2 (en) * | 2000-05-23 | 2007-01-04 | Ge Osmonics, Inc. | Polysulfonamide matrices |
-
2001
- 2001-05-23 MX MXPA02011570A patent/MXPA02011570A/en active IP Right Grant
- 2001-05-23 DE DE60132588T patent/DE60132588T2/en not_active Expired - Lifetime
- 2001-05-23 AT AT01939398T patent/ATE384756T1/en active
- 2001-05-23 AU AU2001264921A patent/AU2001264921B2/en not_active Expired
- 2001-05-23 WO PCT/US2001/016849 patent/WO2001090223A1/en active IP Right Grant
- 2001-05-23 IL IL15304501A patent/IL153045A0/en unknown
- 2001-05-23 CN CNB018132634A patent/CN1297590C/en not_active Expired - Lifetime
- 2001-05-23 CA CA2409615A patent/CA2409615C/en not_active Expired - Lifetime
- 2001-05-23 AU AU6492101A patent/AU6492101A/en active Pending
- 2001-05-23 KR KR1020027015900A patent/KR100780989B1/en active IP Right Grant
- 2001-05-23 EP EP01939398A patent/EP1301559B1/en not_active Expired - Lifetime
- 2001-05-23 JP JP2001587031A patent/JP5000063B2/en not_active Expired - Lifetime
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2002
- 2002-11-22 US US10/302,757 patent/US6987150B2/en not_active Expired - Lifetime
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