CN105330787B - A kind of hydrogel for Adsorption of Heavy Metals and preparation method and application - Google Patents
A kind of hydrogel for Adsorption of Heavy Metals and preparation method and application Download PDFInfo
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- CN105330787B CN105330787B CN201510873443.6A CN201510873443A CN105330787B CN 105330787 B CN105330787 B CN 105330787B CN 201510873443 A CN201510873443 A CN 201510873443A CN 105330787 B CN105330787 B CN 105330787B
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Abstract
The invention discloses a kind of hydrogel for Adsorption of Heavy Metals, the hydrogel is the s-triazine of 2 vinyl, 4,6 diaminourea 1,3,5 and the methyl propane sulfonic acid of 2 acrylamide 2 with 1:3~2:The copolymer of 3 mol ratio composition, the hydrogel is loose structure, and the aperture of the loose structure is 12 μm~28 μm, the diaminourea 1 of 2 vinyl 4,6,3, the part amido of 5 s-triazine forms six-membered ring structure with triazine radical by hydrogen bond, and so as to enhance the mechanical strength of hydrogel, the sulfonic group in the hydrogel is used for that ion exchange to occur with heavy metal ion, while the amido in the hydrogel, for chelating heavy metal ion.Prepared hydrogel has porous network structure, is conducive to the diffusion of hydrone and the absorption of heavy metal, while having preferable circulation absorption characteristic, is used for multiple times, more environmentally-friendly.
Description
Technical field
The invention belongs to be higher than molecular material technology and field of environment protection, more particularly, to one kind for adsorbing weight
Hydrogel of metal and preparation method and application.
Background technology
Heavy Metals in Waters ionic soil causes greatly pass because it is to the mankind and the toxicity of whole ecological environment
Note.Heavy metalions accumulation can cause brain, skin, pancreas and heart disease in human body.Therefore ring is entered in contaminated water
Heavy-metal ion removal is very necessary before border.Current scientific research scholar develops many method heavy-metal ion removals, mainly includes
Ion exchange, UF membrane, chemical precipitation, absorption etc..In these methods, absorption is considered as most economical effective technology, is had
Low cost, it is easy to operate, it is easy to control, the advantages of non-secondary pollution.
Many polymer absorbants are exploited for heavy-metal ion removal, such as polymer fiber, resin, nano combined material
Material, natural polymeric material etc..Wherein, even if hydrogel is significantly swelling in water, its original structure and property can still be kept
Can, stimulate respond to external world, with good chemically and thermally stability, additionally, hydrogel has swelling character and porous
Three-dimensional net structure, can greatly increase the face of functionalization group and heavy metal ion effect in network structure after swelling
Product, so as to improve the adsorption capacity of heavy metal ion.But restriction hydrogel is used as the crucial master of removal heavy metal absorbent three
If adsorption capacity is low, bad mechanical strength is so as to cause the problem for being not easily recycled regeneration and reusability difference.In order to overcome
These problems, many novel hydrogels adsorbents are developed.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, the invention provides a kind of hydrogel, its object is to incite somebody to action
2- vinyl -4,6- diaminostilbenes, 3,5- s-triazine monomers (VDT) and 2- acrylamide-2-methyl propane sulfonics (AMPS) gather
Conjunction obtains copolymer aquagel so that the hydrogel for preparing both has good characterization of adsorption, and with good circulation
Use ability.
To achieve the above object, according to one aspect of the present invention, there is provided a kind of hydrogel for heavy metal adsorption,
The hydrogel is 2- vinyl -4,6- diaminostilbenes, the copolymerization of 3,5- s-triazine and 2- acrylamide-2-methyl propane sulfonics
Thing, wherein, 2- vinyl -4,6- diaminostilbenes, 3,5- s-triazine are 1 with the mol ratio of 2- acrylamide-2-methyl propane sulfonics:
3~2:3, the hydrogel is loose structure, and the aperture of the loose structure is 12 μm~28 μm, 2- vinyl -4,
6- diaminostilbenes, part amido and the triazine radical of 3,5- s-triazine form six-membered ring structure by hydrogen bond, for strengthening hydrogel
Mechanical strength, sulfonic group in the hydrogel is used for that ion exchange to occur with heavy metal ion, while in the hydrogel
Amido, for chelating heavy metal ion.
Preferably, the molecular structural formula of the hydrogel is
It is another aspect of this invention to provide that there is provided a kind of preparation method of the hydrogel, according to following chemical equation
Prepare：
, wherein, m and n represents 2- vinyl -4,6- diaminostilbenes, 3,5- s-triazine monomers and 2- acrylamides -2- respectively
The mole of methyl propane sulfonic acid monomer, m and n are positive integer.
Preferably, the preparation method is comprised the following steps that：
(1) by 2- vinyl -4,6- diaminostilbenes, 3,5- s-triazine and 2- acrylamide-2-methyl propane sulfonics are with 1:3~
2:3 mixed in molar ratio is subsequently adding crosslinking agent and light trigger as reactant, with the common uniform dissolution of reactant in having
In machine solvent；
(2) 2- vinyl -4,6- diaminostilbenes, 3,5- s-triazine and 2- acryloyls are caused under ultraviolet light
Amine -2- methyl propane sulfonic acids are polymerized, and obtain the hydrogel.
Preferably, the quality of the crosslinking agent is the 1%~10% of reactant gross mass, and the quality of the light trigger is
The 1%~2.5% of reactant gross mass.
Preferably, the crosslinking agent is N, and N- methylene-bisacrylamides, the light trigger is 2- hydroxyls -4- (2- hydroxyls
Ethyoxyl) -2- methyl phenyl ketones, the organic solvent is dimethyl sulfoxide (DMSO).
Preferably, also include after the step (2), wash the hydrogel, it is complete to remove wherein unreacted
Impurity.
It is another aspect of this invention to provide that additionally providing a kind of adsorbent for heavy metal including the hydrogel.
Preferably, the heavy metal ion is copper ion.
As it is further preferred that the adsorbent for heavy metal is 149.36mg/ to the maximal absorptive capacity of copper ion
g。
In general, by the contemplated above technical scheme of the present invention compared with prior art, with following beneficial effect
Really：
1st, it is only relatively low with the polymer machinery intensity of AMPS compositions, and VDT monomers cannot complete polymerization in itself, between the two
Common reaction forms polyalcohol hydrogel, the six-membered ring structure formed by hydrogen bond between the amido and triazine group of VDT, no
The mechanical strength of hydrogel is only enhanced, also causes that the polyalcohol hydrogel for being formed has reticulated porous structures, beneficial to heavy metal
The diffusion of ion, increased adsorption capacity；
2nd, AMPS has sulfonic group, ion exchange can occur with heavy metal ion, while AMPS and VDT have amine
Base, can produce chelation, so as to improve the adsorbance of heavy metal ion so that hydrogel is to copper ion with heavy metal ion
Maximal absorptive capacity be 149.36mg/g.
3rd, because the mechanical strength of polyalcohol hydrogel is strengthened, it is more convenient for being used for multiple times, is damaged in removal process
Consumption is small, circulates four times afterwards, and adsorbance only have dropped 10.1%；
4th, hydrogel preparation method of the invention is simple, it is easy to industrialization large-scale production.
Brief description of the drawings
Fig. 1 is the chemical equation of hydrogel of the invention；
Fig. 2 is the aquogel polymer infrared spectrogram of the embodiment of the present invention 1, wherein, abscissa is wavelength；
Fig. 3 is the scanning electron microscope (SEM) photograph of the aquogel polymer of the embodiment of the present invention 1, figure a, b represent respectively amplification 500 times and
2000 times；
Fig. 4 be the embodiment of the present invention 1 absorption before and after thermogravimetric analysis figure；Wherein, abscissa represents temperature, and ordinate is represented
The percentage by weight of hydrogel；
Fig. 5 is x-ray photoelectron spectroscopy figure before and after the absorption of the hydrogel of the embodiment of the present invention 1；Wherein, abscissa represents knot
Close energy；
Fig. 6 is the hydrogel recycling figure of embodiment 1；Wherein, abscissa represents recycling number of times, and ordinate is represented
Adsorption-desorption ability.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as additionally, technical characteristic involved in invention described below each implementation method
Not constituting conflict each other can just be mutually combined.
The invention provides a kind of hydrogel for heavy metal adsorption, the hydrogel is 2- vinyl -4,6- diaminos
Base -1, the copolymer of 3,5- s-triazine (VDT) and 2- acrylamide-2-methyl propane sulfonics (AMPS), its molecular structural formula is
, m:N is 1:3~2:3, m and n is illustrated respectively in the hydrogel, 2- vinyl -4,6- diaminostilbenes, 3,5-
S-triazine monomer and 2- acrylamide-2-methyl propane sulfonic monomers mole (not represent 2- vinyl -4 in the hydrogel,
The quantity of 6- diaminostilbenes, 3,5- s-triazine monomers and the 2- continuously coupled repetitions of acrylamide-2-methyl propane sulfonic monomer)；Its
In, 2- vinyl -4,6- diaminostilbenes form hexatomic ring knot between the amido and triazine group of 3,5- s-triazine by hydrogen bond
Structure, so as to enhance the mechanical strength of hydrogel, the sulfonic group in the hydrogel is used for that ion friendship to occur with heavy metal ion
Change, while the amido in the hydrogel, for chelating heavy metal ion.
The preparation method of above-mentioned hydrogel is carried out by following reaction equation：
It is comprised the following steps that：
(1) by 2- vinyl -4,6- diaminostilbenes, 3,5- s-triazine (VDT) and 2- acrylamide-2-methyl propane sulfonics
(AMPS) mixing is subsequently adding the 1%~10% of reactant gross mass crosslinking agent and reactant gross mass as reactant
1%~2.5% light trigger, with the common uniform dissolution of reactant in organic solvent；The crosslinking agent can be N, N-
Methylene-bisacrylamide, polyethylene, polyvinyl chloride, haloflex etc., the light trigger can be 2- hydroxyl -4- (2-
Hydroxy ethoxy) -2- methyl phenyl ketones, azo diisobutyl, diphenylethan, 2,4-DihydroxyBenzophenone etc., it is described organic
Solvent can be dimethyl sulfoxide (DMSO), acetone, methyl alcohol, n-hexane etc.；Due to VDT amido and triazine group can by hydrogen bond shape
Into six-membered ring structure, the mol ratio of VDT and AMPS requires more than 1 in reactant:3 maintaining the machinery of the hydrogel strong
Degree, however, when the mol ratio of VDT and AMPS is more than 2:When 3, then it is difficult to synthesize successfully.
(2) 2- vinyl -4,6- diaminostilbenes, 3,5- s-triazine and 2- acryloyls are caused under ultraviolet light
Amine -2- methyl propane sulfonic acids are polymerized, and obtain the hydrogel；Its polymerization time is relevant with the amount of reactant, when reaction total amount is
15min is irradiated during 0.5g or so, under the uviol lamp of 20W polymerizable completely.
(3) hydrogel is washed, to remove the wherein complete impurity of unreacted；Can directly wash with water, also can first use
After the organic solvent miscible with water such as ethanol removes reactant, it is washed with water and washs；For example, can with deionized water soak 5d with
On, and 12h changes a deionized water, until the complete impurity of unreacted is removed completely in hydrogel.
The hydrogel can prepare adsorbent for heavy metal, for adsorbing the heavy metal ion such as copper ion, due to wherein having
There are sulfonic group and amido, ion exchange and chelation, its maximum adsorption to copper ion can occur with heavy metal ion
Amount can reach 149.36mg/g.
Herein below is embodiment：
Embodiment 1
(1) 137.15mgVDT (2- vinyl -4,6- diaminostilbenes, 3,5- s-triazine), 310.875mgAMPS (2- are weighed
Acrylamide-2-methyl propane sulfonic) (mol ratio of VDT and AMPS is 2:3) as reactant, with 19.275mg, (reactant is total
5%) the MBAA (N, N- methylene-bisacrylamide) of quality is together added to 5ml centrifuge tubes, by mixture ultrasonic dissolution in
In the dimethyl sulfoxide (DMSO) of 3.70ml, mixed liquor A is obtained；Then light trigger 2- hydroxyls -4- (2- hydroxyl second is added in mixed liquor A
Epoxide) -2- methyl phenyl ketones 11.21mg (the 2.5% of reactant gross mass), it is ultrasonic to being completely dissolved, obtain mixed liquid B.
(2) mixed liquid B is slowly injected into mould, clamp is sealed and used with rubber silicone tube, be 20W's in power
20min is irradiated under uviol lamp, aquogel polymer is obtained, its reaction equation is as shown in Figure 1.
(3) the copolymer aquagel polymer that will be obtained is removed from the molds, and is rinsed repeatedly with deionized water, soaks 7d,
Period changes a water to displace dissolution solvent every 12h, removes the complete monomer of unreacted and a small amount of impurity.
Embodiment 2
Embodiment 1 is repeated with described same steps, difference is that the crosslinking agent is polyethylene, the light trigger
It is azo diisobutyl, the organic solvent is acetone, methyl alcohol, n-hexane.
Embodiment 3
Embodiment 1 is repeated with described same steps, difference is that the crosslinking agent is polyvinyl chloride, described light-initiated
Agent is 2,4-DihydroxyBenzophenone, and the organic solvent is methyl alcohol.
Embodiment 4
Embodiment 1 is repeated with described same steps, difference is that the crosslinking agent is haloflex, and the light draws
Hair agent is diphenylethan, and the organic solvent is n-hexane.
Embodiment 5
Embodiment 1 is repeated with described same steps, difference is that the mol ratio of VDT and AMPS is 1:3, MBAA matter
The quality for measuring 1%, 2- hydroxyls -4- (2- the hydroxy ethoxies) -2- methyl phenyl ketones for reactant gross mass is reactant gross mass
1%.
Embodiment 6
Embodiment 1 is repeated with described same steps, difference is that the quality of MBAA is the 10% of reactant gross mass,
The quality of 2- hydroxyls -4- (2- hydroxy ethoxies) -2- methyl phenyl ketones is the 1.5% of reactant gross mass.
Embodiment 7
Embodiment 1 is repeated with described same steps, difference is that the mol ratio of VDT and AMPS is 1:2.
Interpretation
Fig. 2 is the aquogel polymer infrared spectrogram of the embodiment of the present invention 1, wherein, abscissa is wavelength, can be seen
Go out, there is the typical stretching vibration characteristic peak 1629cm of VDT in figure-1(C=N), it was confirmed that in p (AMPS-co-VDT) hydrogel
The presence of VDT structures.Also there is the C=O stretching vibration absworption peaks 1652cm of secondary amide in AMPS in spectrogram-1, the NH of secondary amide
Peak 1543cm-1；- SO in p (AMPS-co-VDT) hydrogel in figure3The presence of H can be by characteristic peak 1304cm-1, 1041cm-1,
626cm-1 is confirmed.Amide group and sulfonic acid group are the characteristic peaks of AMPS, exist in p (AMPS-co-VDT) hydrogel-
SO3H and-CONH-, illustrates the presence of AMPS structures in p (AMPS-co-VDT) hydrogel.More than demonstrate p (AMPS-co-
VDT) the successful synthesis of hydrogel.
Fig. 3 a are the scanning electron microscope (SEM) photographs of 500 times of the amplification of the aquogel polymer of embodiment 1, and b points of figure is the water of embodiment 1
The scanning electron microscope (SEM) photograph of 2000 times of the amplification of gelatin polymer；There is uneven thread, tablet in Fig. 3 a, it may be possible to which freezing is dry
P (AMPS-co-VDT) inevitable illumination conditions in building-up process are uneven during dry causes, p (AMPS-co-
VDT) hydrogel pore size can be calculated by the scale in Fig. 3 b, and its value is probably between 12 μm~28 μm.In experiment
In drying process, p (AMPS-co-VDT) is inevitably subject to a certain degree of deformation problems, can speculate hydrogel
Its aperture can increase after water absorption and swelling.
Fig. 4 is that the front and rear thermal gravimetric analysis curve figure of hydrogel absorption shows that final residuum amount p (AMPS-co-VDT)-Cu is obvious
It is solidifying more than pure water, illustrate that p (AMPS-co-VDT) has good suction-operated to copper ion.Wherein, using Pyris1TGA types
Thermogravimetric analyzer.Temperature rate：0.1 DEG C/min~200 DEG C/min, 0.1 DEG C of increment；Temperature accuracy：Isothermal ± 1 DEG C, scanning
±2℃；Balance sensitivity：0.1μg；Weighing precision：Up to 10ppm.
Fig. 5 is x-ray photoelectron spectroscopy figure before and after hydrogel absorption, except detecting S2p (168.16eV), C1s
(284.96eV), N1s (399.86eV), the characteristic peak of O1s (531.96eV), also detect Cu2p's (935.66eV) in b figures
Characteristic peak, this explanation Cu2+Successfully it has been adsorbed on p (AMPS-co-VDT).
Fig. 6 is that hydrogel reuses figure, and the figure shows that P (AMPS-co-VDT) hydrogels are recycled by four times
After, still there is stronger adsorption capacity.Wherein, 0.08g gels at 25 DEG C in the Cu of 1000mg/L2+Concussion 12 is small in the aqueous solution
When reach adsorption equilibrium.Afterwards, the hydrogel after absorption shakes 12h in the salpeter solution of 1M and realizes desorbing.By the 4th time and
The adsorbance of first time carries out contrast and can see, and adsorbance drops to 125.6mg from 138.78mg；Every time compared to it is preceding once
Adsorbance decline percentage be respectively 2.1%, 3.2%, 4.5%；It can be seen that, inhaled by 4 hydrogels of desorption and regeneration
Attached amount declines 10.1% altogether.From desorption efficiency, the HNO of 1mol/L3To the Desorption Energy of P (AMPS-co-VDT) hydrogel
Power is very strong, and desorption rate is up to more than 95%.
Above analysis is carried out to embodiment 2- embodiments 7, result similar to Example 1 is also can obtain.
As it will be easily appreciated by one skilled in the art that the foregoing is only presently preferred embodiments of the present invention, it is not used to
The limitation present invention, all any modification, equivalent and improvement made within the spirit and principles in the present invention etc., all should include
Within protection scope of the present invention.
Claims (7)
1. a kind of hydrogel for Adsorption of Heavy Metals, it is characterised in that the hydrogel is 2- vinyl -4,6- diaminourea -
1,3,5-triazines and 2- acrylamide-2-methyl propane sulfonics, the copolymer of crosslinking agent, wherein, 2- vinyl -4,6- diaminourea -
1,3,5-triazines is 1 with the mol ratio of 2- acrylamide-2-methyl propane sulfonics:3~2:3, the hydrogel is loose structure, and
The aperture of the loose structure is 12 μm~28 μm.
2. the preparation method of hydrogel as claimed in claim 1, it is characterised in that comprise the following steps：
(1) by 2- vinyl -4,6- diamino-1,3,5-triazines and 2- acrylamide-2-methyl propane sulfonics are with 1:3~2:3
Mixed in molar ratio is subsequently adding crosslinking agent and light trigger as reactant, with the common uniform dissolution of reactant in organic molten
In agent；
(2) 2- vinyl -4,6- diamino-1,3,5-triazines and 2- acrylamide -2- first are caused under ultraviolet light
Base propane sulfonic acid is polymerized, and obtains the hydrogel.
3. preparation method as claimed in claim 2, it is characterised in that the quality of the crosslinking agent is reactant gross mass
1%~10%, the quality of the light trigger is the 1%~2.5% of reactant gross mass.
4. preparation method as claimed in claim 2, it is characterised in that the crosslinking agent is N, N '-methylene-bisacrylamide,
The light trigger is 2- hydroxyls -4 '-(2- hydroxy ethoxies) -2- methyl phenyl ketones, and the organic solvent is dimethyl sulfoxide (DMSO).
5. preparation method as claimed in claim 2, it is characterised in that also include after the step (2), washs the water
Gel, to remove the wherein complete impurity of unreacted.
6. a kind of adsorbent for heavy metal, it is characterised in that including hydrogel as claimed in claim 1.
7. adsorbent for heavy metal as claimed in claim 6, it is characterised in that the maximal absorptive capacity to copper ion is
149.36mg/g。
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| CN108246273B (en) * | 2018-02-08 | 2021-01-22 | 天津大学 | Sulfonated sodium alginate grafted agarose gel chromatographic medium, preparation method and application |
| CN109174047A (en) * | 2018-09-30 | 2019-01-11 | 天津市金鳞水处理科技有限公司 | One kind having both detection of heavy metal ion and absorbent-type polyacrylamide microgel |
| CN113308077B (en) * | 2021-06-18 | 2022-02-01 | 湖北工业大学 | Self-repairing circular processing formed poly (ampholyte-triazine)/quartz sand composite material and preparation method thereof |
| CN114957779B (en) * | 2022-06-10 | 2023-06-20 | 湖北工业大学 | Preparation method of oil-water separation hydrogel capable of adsorbing dye and resisting salt |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102188956A (en) * | 2011-04-13 | 2011-09-21 | 南京大学 | Heavy metal adsorption copolymer with sulfonic acid group and preparation method thereof, and application of heavy metal adsorption copolymer to water treatment |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102188956A (en) * | 2011-04-13 | 2011-09-21 | 南京大学 | Heavy metal adsorption copolymer with sulfonic acid group and preparation method thereof, and application of heavy metal adsorption copolymer to water treatment |
Non-Patent Citations (2)
| Title |
|---|
| "Enhanced adsorption of heavy metal ions onto simultaneous interpenetrating polymer network hydrogels synthesized by UV irradiation";Jing Jing Wang等;《Polymer Bulletin》;20130216;第70卷(第4期);第1417、1419、1421页 * |
| "High-strength hydrogel as a reusable adsorbent of copper ions";Ning Wang等;《Journal of Hazardous Materials》;20120206;第213-214卷;第259、260-261页 * |
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