CN106046247A - CO 2 responsive hyperbranched polymer and preparation method and application thereof - Google Patents

CO 2 responsive hyperbranched polymer and preparation method and application thereof Download PDF

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CN106046247A
CN106046247A CN201610546496.1A CN201610546496A CN106046247A CN 106046247 A CN106046247 A CN 106046247A CN 201610546496 A CN201610546496 A CN 201610546496A CN 106046247 A CN106046247 A CN 106046247A
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response
methyl
monomer
dissaving polymer
acrylamide
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CN106046247B (en
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张祺
付密林
王建黎
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Zhejiang University of Technology ZJUT
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10Esters
    • C08F220/34Esters containing nitrogen, e.g. N,N-dimethylaminoethyl (meth)acrylate
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/445Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by forward osmosis
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F6/00Post-polymerisation treatments
    • C08F6/06Treatment of polymer solutions
    • C08F6/12Separation of polymers from solutions
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/08Seawater, e.g. for desalination
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124Water desalination
    • Y02A20/131Reverse-osmosis
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/30Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37Wastewater or sewage treatment systems using renewable energies using solar energy

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  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
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  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
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  • Separation Using Semi-Permeable Membranes (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

The invention provides CO2A responsive hyperbranched polymer prepared by one of the following methods: (1) to have CO2Using responsive monomer, catalyst, ligand, initiator monomer and solvent as raw materials, and adopting ATRP method to prepare target product; (2) to have CO2Preparing a target product by taking a responsive monomer, a chain transfer agent type monomer, an initiator and a solvent as raw materials and adopting an RAFT (reversible addition-fragmentation chain transfer) method; CO of the invention2The responsive hyperbranched polymer can be used as a forward osmosis draw solute and is particularly applied to the forward osmosis seawater desalination process: introducing CO into the drawing liquid2The polymer is dissolved in water to form a high osmotic pressure drawing liquid, the water flux is large, the reverse diffusion is small, and N is introduced into the drawing liquid after the diffusion is stopped2The polymer can be precipitated and recycled by filtration for the next forward osmosis, and the recycling operation of the draw solute is simple and convenient, the energy consumption is low, and the draw solute can be reused.

Description

A kind of CO2Response dissaving polymer and preparation method and application
(1) technical field
The present invention relates to a kind of CO2Response dissaving polymer, and preparation method thereof, and as just permeating draw molten The application of matter.
(2) background technology
Along with population increases and the acceleration of process of industrialization, the problem that World Freshwater Resources is deficient seems further serious, this Threaten the survival and development of the mankind to a certain extent.The growing tension of freshwater resources makes increasing countries and regions Greatly develop desalination technology, seawater desalination is obtained fresh water.Just permeating is that one is not required to impressed pressure and does driving force, and only Relying on the membrane separating process that osmotic pressure drives, and fouling membrane situation is the lightest, it is possible to operation for a long time without Clean, have good application prospect in the field such as desalinization, sewage purification.But, draw solute reverse diffusion and Subsequent process draws the separation process of solute and water is loaded down with trivial details and the application that needs the shortcomings such as energy consumption to limit positive infiltration technology with Development.
Drawing liquid and need to provide sufficiently high osmotic pressure, the most properity and pure water quality to film do not impact, Additionally, simpler method also should be able to be used therefrom to isolate pure water, to obtain fresh water.Draw the solute in liquid be called draw molten Matter, preferably draws solute and should possess following condition: 1. can produce higher osmotic pressure, i.e. should have higher in water Dissolubility, thus should have less molecular mass;2. avirulence, can security presence in producing water;3. can stable existence, I.e. can not be with film generation chemical reaction;4. during preparing pure water, it should can facilitate and liquid and pure water will be drawn economically Carry out separating and can reusing.Select suitably to draw the important topic during liquid is always positive penetration study.
The solute that draws reported includes: salt such as NaCl, MgCl2、Al2(SO4)3、NH4HCO3;Saccharide such as glucose, really Sugar etc..Jeffrey R.McCutcheon etc. (J.Membr.Sci., 2006,278,114 123.) report with NH4HCO3Solution is Draw liquid, be applied to positive penetration sea water desalinization.Draw solute to separate by heat resolve NH with water4HCO3Reach to separate purpose, Draw solute can not reuse.
It is the positive osmosis system drawing liquid that CN 203668144U discloses with hydrogel, and the hydrogel of employing is temperature sensitive water Gel, utilizes solar energy equal energy source heating hydrogel to make it be dehydrated to water-purifying container.Solar energy needs sizable daylighting thermal-arrest Face could meet use requirement, and device ground area is big, and materials are many, and cost increases;Atmospheric effect is relatively big, and solar energy has certain Limitation.
Yufeng Cai etc. (Chem.Commun., 2013,49,8377) propose with having CO2The line answered with temperature double-bang firecracker Type polymethylacrylic acid dimethylaminoethyl (PDMAEMA) is as drawing solute for desalinization.Line style PDMAEMA is drawn Solute, is applied to positive penetration sea water desalinization.It is high that the PDMAEMA that molecular weight is high draws liquid osmotic pressure, but high molecular PDMAEMA dissolubility in water is low and draws solute and can inversely be diffused into material liquid side, causes drawing solute loss.
(3) summary of the invention
For defect present in prior art, the present invention method by ATRP or RAFT, design and be prepared for one There is CO2The dissaving polymer of response, and draw solute be applied to positive penetration sea water desalinization as just permeating.Polymerization Thing dissaving structure has the characteristic such as highly dissoluble, low viscosity, and branched structure can efficiently reduce the reverse expansion of polymer Dissipate.To drawing, liquid is passed through CO2, what polymer was dissolved in that water forms hyperosmosis draws liquid, and water flux is big, and reverse diffusion is little.Stop Only after diffusion, to drawing, liquid is passed through N2, polymer meeting Precipitation, it is recovered by filtration polymer, just permeates for next time. Draw the reclaimer operation simplicity of solute, energy consumption is low and can reuse.
Therefore, it is an object of the invention to provide a kind of CO2Response dissaving polymer and preparation method thereof and conduct Just permeating the application drawing solute.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of CO2Response dissaving polymer, its preparation method has two kinds:
The first preparation method:
To have CO2The monomer of response, catalyst, part, inimers, solvent are raw material, use ATRP (former Sub-transferring free-radical polymerization) method, prepare described CO2Response dissaving polymer.
In the first described preparation method,
Described have CO2The monomer of response and inimers, catalyst, the ratio of amount of material of part are 1: 0.01~0.5:0.01~0.1:0.01~0.1;The amount of the material of described solvent has CO with described2The monomer of response and drawing The ratio of the amount sum sending out the material of dosage form monomer is 1~10:1;
The concrete operation step of described ATRP method is: adds inimers in reaction vessel I, have CO2Response The monomer of property, part, solvent, obtain liquid mixture, under the conditions of room temperature (20~30 DEG C), stir and lead to N2Except O215~ 60min;Catalyst, at ambient temperature, logical N is added in reaction vessel II2Except O215~60min;Under anaerobic, will Liquid mixture in reaction vessel I adds in reaction vessel II, and then reaction vessel II is placed in the thermostatical oil of 40~80 DEG C Bath reacts 6~12h;After completion of the reaction, reactant liquor is post-treated, obtains described CO2Response dissaving polymer;
The method of described reactant liquor post processing is: after completion of the reaction, and reactant liquor adds the normal hexane of 5~30 times of volumes In (0 DEG C), Precipitation, incline except supernatant liquid, precipitation oxolane carried out post (to remove catalyst) after dissolving, described The method crossing post is: with neutral Al2O3For column packing, oxolane is eluant, with reactant liquor volume 3~the tetrahydrochysene furan of 10 times Muttering eluting, the eluent of collection is dialysed with the bag filter of 3500~12000 molecular weight again, and last lyophilization i.e. obtains described CO2Response dissaving polymer;
Described " reaction vessel I ", " reaction vessel II " does not has special implication, is labeled as " I ", " II " is only intended to district Divide the reaction vessel used in different operating step;
Described catalyst is transition metal halide, the most such as: CuBr, CuCl or CuI;
Described part is bipyridyl, N, N, N, N, N-five methyl diethylentriamine (PMDTETA) or 1,1,4,7,10, 10-hexamethyl trien (HMTETA);
Described solvent be ethyl acetate, dichloromethane, oxolane, acetone, normal hexane, petroleum ether, methanol, ethanol or Chloroform;
Described inimers is BPEA, BIEM, BPEM or BIEA, and its structural formula is as follows:
Described has CO2The monomer of response is selected from one of following:
(methyl) dimethylaminoethyl acrylate, (methyl) acrylate propyl ester, (methyl) acrylic acid diformazan ammonia Base butyl ester, (methyl) acrylic acid diethylamino ethyl ester, (methyl) acrylic acid diethylamino propyl ester, (methyl) acrylic acid diethyl Base aminobutyrate, (methyl) acrylamide dimethylaminoethyl, (methyl) acrylamide dimethylamino propyl ester, (methyl) acryloyl Amine dimethylamino butyl ester, (methyl) acrylamide diethylamino ethyl ester, (methyl) acrylamide diethylamino propyl ester or (first Base) acrylamide diethylamino butyl ester;
The second preparation method:
To have CO2The monomer of response, chain tra nsfer dosage form monomer, initiator, solvent are raw material, use RAFT (reversible Addition-fracture chain tra nsfer) method, prepare described CO2Response dissaving polymer;
In described the second preparation method,
Described have CO2The monomer of response is 1:0.02 with the ratio of chain tra nsfer dosage form monomer, the amount of the material of initiator ~0.1:0.002~0.01;The volumetric usage of described solvent is to have CO2The amount of the material of the monomer of response be calculated as 0.5~ 5L/mol;
The concrete operation step of described RAFT method is: adds in reaction vessel and has CO2The monomer of response, chain tra nsfer Dosage form monomer, initiator, solvent, logical N after sealing2Except O215~60min, then reaction vessel is placed in the constant temperature of 40~90 DEG C Oil bath pan reacts 12~24h, reacts with liquid nitrogen cancellation afterwards, add chloroform dilute reaction solution (generally dilution 1~5 times), will Reactant liquor after dilution adds in the normal hexane (0 DEG C) of 5~30 times of volumes, and Precipitation inclines except supernatant liquid, lower sediment Vacuum drying, prepares described CO2Response dissaving polymer;
Described have CO2The monomer of response is identical with the definition in the first preparation method;
Described initiator is chemical initiator or photochemical initiators;Described chemical initiator includes that peroxide causes Agent, azo-initiator, described peroxide initiator is concrete such as: Ammonium persulfate., potassium peroxydisulfate etc., described azo draws Send out agent concrete such as: 4,4 '-azo double (4-cyanopentanoic acid), azo diisobutyl amidine hydrochlorate, azo diisopropyl imidazoline Hydrochlorate, azo diisopropyl imidazoline etc.;Described photochemical initiators is concrete such as: 2-hydroxyl-1-[4-(hydroxyl) benzene Base]-2-methyl isophthalic acid-acetone etc.;
Described solvent be ethyl acetate, dichloromethane, oxolane, acetone, normal hexane, petroleum ether, methanol, ethanol, Chloroform, 1,4-dioxane, DMAC N,N' dimethyl acetamide, N,N-dimethylformamide, Methanamide or isopropanol;
Described chain tra nsfer dosage form monomer is containing dithio or the vinyl of trithio, phenylethylene or acrylic compounds Compound, the most such as: (2-ethyoxyl dithioester base) vinylacetate (A), 2-[(2-{ [(dodecyl sulfur generation) carbonyl] Sulfur generation }-2-methylpropionyl) epoxide]-ethyl acrylate (B), propyl group (4-vinyl benzyl) carbodithioic acid (C), (2-second Thiazolinyl dithioester base) acetate (D), its structural formula is as follows:
The CO that the inventive method prepares2Response dissaving polymer can draw solute application, particularly as just permeating During being applied to positive penetration sea water desalinization.
As just permeate draw solute be applied to during positive penetration sea water desalinization time,
Just permeating and drawing the compound method of liquid and be: taking CO of the present invention2Response dissaving polymer is added to the water, and is passed through CO2, CO of the present invention2Liquid is drawn in the formation soluble in water of response dissaving polymer;Described CO2Response dissaving polymer with The mass ratio of water controls 0.1~0.8:1;Described it is passed through CO2Rate controlled 20~500ml/min, the time controls 30min~6h;
The recovery method drawing solute is: after stopping diffusion, be passed through N to drawing in liquid2, CO of the present invention2Response is hyperbranched Polymer meeting Precipitation, is recovered by filtration, just permeates for next time;Described it is passed through N2Rate controlled 20~500ml/min, Time controls at 30min~6h.
The beneficial effects of the present invention is: the present invention is by atom transfer radical polymerization (ATRP) or reversible addition-disconnected The method preparation splitting chain tra nsfer (RAFT) has CO2The dissaving polymer of response, and be applied to as drawing solute Positive penetration sea water desalinization.To drawing, liquid is passed through CO2, what polymer was dissolved in that water forms hyperosmosis draws liquid, and water flux is big, inverse Little to diffusion.After stopping diffusion, to drawing, liquid is passed through N2, polymer meeting Precipitation, it is recovered by filtration polymer, is used for Next time just permeates.Draw the reclaimer operation simplicity of solute, energy consumption is low and can reuse.
(4) detailed description of the invention
Below by specific embodiment, the present invention is further illustrated, but protection scope of the present invention is not limited in This.
Embodiment 1
BIEM 0.8g (2.75mmol), diethylaminoethyl methacrylate is added in the single port flask I of 25ml (DEAEMA) 5.1g (27.5mmol), ethyl acetate 5mL (51.1mmol), PMDTETA 54mg (0.3mmol), magnetic agitation, At ambient temperature, logical N2Except O2.Separately take the CuBr that 25ml flask II adds 43.5mg (0.3mmol), at ambient temperature, logical N2Except O2.After 30min, under anaerobic, the liquid mixture in flask I is added flask II, then flask II is put into 60 DEG C thermostatical oil bath in, react 12h.After completion of the reaction, reactant liquor is added in 90mL normal hexane (0 DEG C), Precipitation, will The supernatant is outwelled, and after precipitation is dissolved with 10ml oxolane, crosses post, with neutral Al2O3For column packing, 45mL oxolane is Eluant, the eluent of collection is dialysed with the bag filter of 3500 molecular weight, the reservation liquid lyophilization in bag filter is prepared Hyperbranched PDEAEMA (polymethylacrylic acid lignocaine ethyl ester) 4.01g;
In this example, the conversion ratio of polymerization system is 67%, its number-average molecular weight is 6800, molecular weight distribution is 2.1.Take 4.01g PDEAEMA puts in 10mL water, is passed through CO2, PDEAEMA be dissolved in water formed concentration be 0.4g/g draw liquid (raw material Liquid is 0.5M NaCl solution), osmotic pressure reaches 1.306osmol/kg, and water flux is 0.8L/ (m2H), the reverse diffusing capacity of solute is 15mg/(m2*h).After stopping diffusion, to drawing, liquid is passed through N2, polymer meeting Precipitation, it is recovered by filtration polymer, uses Just permeate next time.Showing that PDEAEMA draws liquid and has good osmotic effect, and reclaimer operation is simple, polymer loss is few.
Embodiment 2
BIEM 0.8g (2.75mmol), diethylaminoethyl methacrylate is added in the single port flask I of 25ml (DEAEMA) 10.2g (55mmol), ethyl acetate 10mL (102.3mmol), PMDTETA 100mg (0.58mmol), magnetic force stirs Mix, at ambient temperature, logical N2Except O2.Separately take the CuBr that 25ml flask II adds 83.4mg (0.58mol), at ambient temperature, Logical N2Except O2.After 30min, under anaerobic, the liquid mixture in flask I is added flask II, then flask II is put into In the thermostatical oil bath of 60 DEG C, react 12h.After completion of the reaction, reactant liquor is added in 160mL normal hexane (0 DEG C), precipitation analysis Go out, the supernatant is outwelled, after precipitation is dissolved with 20ml oxolane, cross post, with neutral Al2O3For column packing, 80mL tetrahydrochysene furan Mutter as eluant, collect eluent again with the bag filter dialysis of 8000 molecular weight, by the reservation liquid lyophilization system in bag filter Obtain hyperbranched PDEAEMA 7.8g;
In this example, the conversion ratio of polymerization system is 74%, its number-average molecular weight is 13600, molecular weight distribution is 1.88. Take 3g PDEAEMA to put in 10mL water, be passed through CO2, PDEAEMA be dissolved in water formed concentration be 0.3g/g draw liquid (material liquid For 0.5M NaCl solution), osmotic pressure the highest (exceed permeability manometer and detect the 2osmol/kg that reaches the standard grade), water flux is 2.6L/ (m2* H), the reverse diffusing capacity of solute is 52mg/ (m2*h).After stopping diffusion, to drawing, liquid is passed through N2, polymer meeting Precipitation is logical Polymer is recovered by filtration, just permeates for next time.Show that the PDEAEMA that number-average molecular weight is high draws solute penetration effect Good, and reclaimer operation is simple.
Embodiment 3
DEAEMA 5.6g (30mmol), 2-[(2-{ [(dodecyl sulfur generation) carbonyl is added in the round-bottomed flask of 100ml Base] sulfur generation-2-methylpropionyl) epoxide]-ethyl acrylate 0.46g (1mmol), AIBN 18mg (0.1mmol), 1,4-bis- Oxygen six ring 30ml, and use rubber closure sealed flask.With syringe needle logical N in flask2Except O2After 30min, flask is placed in 70 DEG C Oil bath pan reacts 24h.React with liquid nitrogen cancellation, add the dilution of 10mL chloroform, then the reactant liquor after dilution is just being added 300mL In hexane (0 DEG C), Precipitation, the supernatant being outwelled, lower sediment vacuum drying prepares dissaving polymer PDEAEMA6.6g。
In this example, the conversion ratio of polymerization system is 82%, its number-average molecular weight is 8000, molecular weight distribution is 1.7.Take 4g PDEAEMA puts in 10mL water, is passed through CO2, PDEAEMA is dissolved in the liquid that draws that water formation concentration is 0.4g/g, and (material liquid is 0.5MNaCl solution), osmotic pressure is 1.204osmol/kg, and water flux is 0.6L/ (m2H), the reverse diffusing capacity of solute is 22mg/ (m2*h).After stopping diffusion, to drawing, liquid is passed through N2, polymer meeting Precipitation, it is recovered by filtration polymer, under being used for Secondary just permeate.Show that the PDEAEMA that number-average molecular weight is high draws solute penetration effective, and reclaimer operation is simple.
Embodiment 4
DEAEMA5.6g (30mmol), 2-[(2-{ [(dodecyl sulfur generation) carbonyl] is added in the round-bottomed flask of 100ml Sulfur generation }-2-methylpropionyl) epoxide]-ethyl acrylate 0.46g (1mmol), AIBN18mg (0.1mmol), 1,4-dioxy six Ring 30ml, and use rubber closure sealed flask.With syringe needle logical N in flask2Except O230min, is placed in flask in the oil bath pan of 70 DEG C Reaction 24h.React with liquid nitrogen cancellation, after adding the dilution of 10mL chloroform, then the reactant liquor after dilution is added 300mL normal hexane (0 DEG C) in, Precipitation, the supernatant to be outwelled, lower sediment vacuum drying prepares dissaving polymer PDEAEMA6.2g.
In this example, the conversion ratio of polymerization system is 82%, its number-average molecular weight is 8000, molecular weight distribution is 1.7.Take 6g PDEAEMA puts in 10mL water, is passed through CO2, PDEAEMA is dissolved in the liquid that draws that water formation concentration is 0.6g/g, and (material liquid is 0.5MNaCl solution), osmotic pressure the highest (exceed permeability manometer and detect the 2osmol/kg that reaches the standard grade), water flux is 2.4L/ (m2H), The reverse diffusing capacity of solute is 31mg/ (m2*h).After stopping diffusion, to drawing, liquid is passed through N2, polymer meeting Precipitation, passes through Polymer is recovered by filtration, just permeates for next time.Show that PDEAEMA concentration of aqueous solution more Thief zone effect is the best, and reclaim behaviour Making simple, polymer loss is few.
Comparative example 1
2-isobutyl ethyl bromide 0.11g (0.54mmol), DEAEMA 5.0g is added in the single port flask I of 25ml (27mmol), PMDTETA 94mg (0.54mmol), magnetic agitation, at ambient temperature, logical N2Except O2.Separately take 25ml flask II Add the CuBr (I) of 77.5mg (0.54mmol), at ambient temperature, logical N2Except O2.After 30min, under anaerobic, will burn Liquid mixture in bottle I adds flask II, is then put into by flask II in the thermostatical oil bath of 60 DEG C, reacts 0.2h.Reaction After, reactant liquor is added in 90mL normal hexane (0 DEG C), Precipitation, the supernatant is outwelled, precipitation 10ml tetrahydrochysene furan Mutter after dissolving, cross post, with neutral Al2O3For column packing, 35mL oxolane is eluant, collects eluent and uses 3500 molecules again The bag filter dialysis of amount, prepares linear PDEAEMA 4.1g by the liquid lyophilization that retains in bag filter;
In this example, the conversion ratio of polymerization system is 89%, its weight average molecular weight is 8400, molecular weight distribution is 1.12. Take the linear PDEAEMA of 3g to put in 10mL water, be passed through CO2, PDEAEMA be dissolved in water formed concentration be 0.3g/g draw liquid, ooze Pressure reaches 1.14osmol/kg thoroughly, and water flux is 0.4L/ (m2H), the reverse diffusing capacity of solute is 47mg/ (m2*h).Show hyperbranched PDEAEMA draws liquor ratio line style PDEAEMA and draws liquid and have more preferable osmotic effect, and solute inversely spreads less.
Comparative example 2
Concentration be the magnesium chloride of 150g/L as drawing liquid, the NaCl of 35g/L is as material liquid, and water flux is 1.2L/ (m2*h).Magnesium chloride is loaded down with trivial details with the separation process of water, compares magnesium chloride as drawing solute, and hyperbranched PDEAEMA is as drawing Solute, reclaimer operation is easy, energy consumption is low and can reuse.
Summary embodiment and comparative example are visible, and the inventive method has CO by preparation2The hyperbranched poly of response Compound also draws solute be applied in positive penetration sea water desalinization as just permeating.During positive penetration sea water desalinization, to Draw and liquid is passed through CO2, what polymer was dissolved in that water forms hyperosmosis draws liquid, and water flux is big, and reverse diffusion is little.Stop diffusion After, to drawing, liquid is passed through N2, polymer meeting Precipitation, it is recovered by filtration polymer, just permeates for next time.Draw molten The reclaimer operation of matter is easy, energy consumption is low and can reuse.The dissaving polymer that the present invention obtains is just to permeate sea water light Change has and well applies effect.
Above-described embodiment be used for illustrate the present invention rather than limit the invention, the present invention spirit and In scope of the claims, any modifications and changes that the present invention is made, both fall within protection scope of the present invention.

Claims (8)

1. a CO2Response dissaving polymer, it is characterised in that described CO2Response dissaving polymer is by such as lower section Method prepares:
To have CO2The monomer of response, catalyst, part, inimers, solvent are raw material, use atom transfer freely Base polymerization, prepares described CO2Response dissaving polymer;
Described have CO2The monomer of response and inimers, catalyst, the ratio of amount of material of part be 1:0.01~ 0.5:0.01~0.1:0.01~0.1;The amount of the material of described solvent has CO with described2The monomer of response and initiation dosage form The ratio of the amount sum of the material of monomer is 1~10:1;
Described catalyst is CuBr, CuCl or CuI;
Described part is bipyridyl, N, N, N, N, N-Five methyl diethylentriamineOr 1,1,4,7,10,10-hexamethyl Sanya Tetramine;
Described solvent is ethyl acetate, dichloromethane, oxolane, acetone, normal hexane, petroleum ether, methanol, ethanol or trichlorine Methane;
Described inimers is BPEA, BIEM, BPEM or BIEA, and its structural formula is as follows:
Described has CO2The monomer of response is selected from one of following:
(methyl) dimethylaminoethyl acrylate, (methyl) acrylate propyl ester, (methyl) acrylate fourth Ester, (methyl) acrylic acid diethylamino ethyl ester, (methyl) acrylic acid diethylamino propyl ester, (methyl) acrylic acid diethyl amino Base butyl ester, (methyl) acrylamide dimethylaminoethyl, (methyl) acrylamide dimethylamino propyl ester, (methyl) acrylamide two Methylamino butyl ester, (methyl) acrylamide diethylamino ethyl ester, (methyl) acrylamide diethylamino propyl ester or (methyl) Acrylamide diethylamino butyl ester.
2. CO as claimed in claim 12Response dissaving polymer, it is characterised in that described atom transferred free radical gathers Legal operating procedure is:
In reaction vessel I, add inimers, there is CO2The monomer of response, part, solvent, obtain liquid mixing Thing, at ambient temperature, stirs and leads to N2Except O215~60min;Addition catalyst in reaction vessel II, at ambient temperature, Logical N2Except O215~60min;Under anaerobic, the liquid mixture in reaction vessel I is added in reaction vessel II, then Reaction vessel II is placed in the thermostatical oil bath of 40~80 DEG C reaction 6~12h;After completion of the reaction, reactant liquor is post-treated, To described CO2Response dissaving polymer.
3. CO as claimed in claim 22Response dissaving polymer, it is characterised in that the method for described reactant liquor post processing For:
After completion of the reaction, being added by reactant liquor in normal hexane, Precipitation, incline except supernatant liquid, precipitation oxolane dissolves After carried out post, described cross post method be: with neutral Al2O3For column packing, oxolane is eluant, the eluent of collection Dialysing with the bag filter of 3500~12000 molecular weight, last lyophilization i.e. obtains described CO again2The hyperbranched polymerization of response Thing.
4. a CO2Response dissaving polymer, it is characterised in that described CO2Response dissaving polymer is by such as lower section Method prepares:
To have CO2The monomer of response, chain tra nsfer dosage form monomer, initiator, solvent are raw material, use reversible addition-fracture chain Transfer method, prepares described CO2Response dissaving polymer;
Described have CO2The monomer of response is 1:0.02~0.1 with the ratio of chain tra nsfer dosage form monomer, the amount of the material of initiator: 0.002~0.01;The volumetric usage of described solvent is to have CO2The amount of the material of the monomer of response is calculated as 0.5~5L/mol;
Described initiator is Ammonium persulfate., potassium peroxydisulfate, 4,4 '-azo double (4-cyanopentanoic acid), azo diisobutyl amidine salt Hydrochlorate, azo diisopropyl imidazoline hydrochloride, azo diisopropyl imidazoline or 2-hydroxyl-1-[4-(hydroxyl) phenyl]-2- Methyl isophthalic acid-acetone;
Described solvent is ethyl acetate, dichloromethane, oxolane, acetone, normal hexane, petroleum ether, methanol, ethanol, trichlorine Methane, 1,4-dioxane, DMAC N,N' dimethyl acetamide, N,N-dimethylformamide, Methanamide or isopropanol;
Described chain tra nsfer dosage form monomer is: (2-ethyoxyl dithioester base) vinylacetate (A), 2-[(2-{ [(12 Alkylthio) carbonyl] sulfur generation-2-methylpropionyl) epoxide]-ethyl acrylate (B), propyl group (4-vinyl benzyl) dithio Carboxylic acid (C), (2-vinyl dithioester base) acetate (D), its structural formula is as follows:
Described has CO2The monomer of response is selected from one of following:
(methyl) dimethylaminoethyl acrylate, (methyl) acrylate propyl ester, (methyl) acrylate fourth Ester, (methyl) acrylic acid diethylamino ethyl ester, (methyl) acrylic acid diethylamino propyl ester, (methyl) acrylic acid diethyl amino Base butyl ester, (methyl) acrylamide dimethylaminoethyl, (methyl) acrylamide dimethylamino propyl ester, (methyl) acrylamide two Methylamino butyl ester, (methyl) acrylamide diethylamino ethyl ester, (methyl) acrylamide diethylamino propyl ester or (methyl) Acrylamide diethylamino butyl ester.
5. CO as claimed in claim 42Response dissaving polymer, it is characterised in that described reversible addition-fracture chain turns The operating procedure of shifting method is:
Reaction vessel adds there is CO2The monomer of response, chain tra nsfer dosage form monomer, initiator, solvent, logical N after sealing2 Except O215~60min, then reaction vessel is placed in the thermostatical oil bath of 40~90 DEG C reaction 12~24h, uses liquid nitrogen afterwards Cancellation is reacted, and adds chloroform dilute reaction solution, adds in normal hexane by the reactant liquor after dilution, and Precipitation inclines except upper liquid Body, lower sediment is vacuum dried, and prepares described CO2Response dissaving polymer.
6. the CO as described in claim 1 or 42Response dissaving polymer draws solute application as just permeating.
7. the CO as described in claim 1 or 42Response dissaving polymer draws solute be applied to just permeate as just permeating In desalting process.
Apply the most as claimed in claim 7, it is characterised in that described CO2Response dissaving polymer draws as just permeating Take solute when being applied to during positive penetration sea water desalinization,
Just permeating and drawing the compound method of liquid and be: taking described CO2Response dissaving polymer is added to the water, and is passed through CO2, institute The CO stated2Liquid is drawn in the formation soluble in water of response dissaving polymer;Described CO2Response dissaving polymer and the matter of water Amount ratio controls 0.1~0.8:1;Described it is passed through CO2Rate controlled 20~500ml/min, the time control at 30min~ 6h;
The recovery method drawing solute is: after stopping diffusion, be passed through N to drawing in liquid2, described CO2The hyperbranched polymerization of response Thing meeting Precipitation, is recovered by filtration, just permeates for next time;Described it is passed through N2Rate controlled 20~500ml/min, the time Control at 30min~6h.
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CN106938194B (en) * 2017-03-16 2020-03-27 天津大学 Synthesis method and application of monodisperse high-catalytic-performance solution-state silver nanoparticles
CN108047455A (en) * 2018-02-09 2018-05-18 中国人民解放军陆军军医大学 Amphipathy hyperbranched polymer for antigen vectors and its preparation method and application
CN108329483A (en) * 2018-02-09 2018-07-27 中国人民解放军陆军军医大学 Amphipathy hyperbranched polymer and its preparation method and application
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CN108395498A (en) * 2018-04-13 2018-08-14 沈阳工业大学 A kind of PDMAEMA and its preparation method and application of hyperbranched macromolecular structure
CN109161045A (en) * 2018-08-30 2019-01-08 江南大学 A kind of temperature, pH double-response type intelligent macromolecular membrane and preparation method thereof
CN109161045B (en) * 2018-08-30 2020-12-15 江南大学 Temperature and pH dual-response type intelligent polymer film and preparation method thereof
CN114011241A (en) * 2021-11-29 2022-02-08 中新国际联合研究院 Responsive mixed draw solution containing organic molecules or polymers and inorganic salts and application
CN114011241B (en) * 2021-11-29 2024-03-26 中新国际联合研究院 Responsive mixed drawing liquid containing organic molecules or polymers and inorganic salts and application thereof

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