CN109967049A - A kind of uranium absorption agent and preparation method thereof - Google Patents
A kind of uranium absorption agent and preparation method thereof Download PDFInfo
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- CN109967049A CN109967049A CN201910174298.0A CN201910174298A CN109967049A CN 109967049 A CN109967049 A CN 109967049A CN 201910174298 A CN201910174298 A CN 201910174298A CN 109967049 A CN109967049 A CN 109967049A
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28033—Membrane, sheet, cloth, pad, lamellar or mat
- B01J20/28038—Membranes or mats made from fibers or filaments
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- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
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Abstract
The present invention provides a kind of uranium absorption agent, including polyethylene nano fibrous membrane and the amidoxime group being grafted on the polyethylene nano fibrous membrane；The polyethylene nano fibrous membrane is made of polyethylene porous fiber, and the fibre diameter of the polyethylene porous fiber is 10~100nm；The porosity of the polyethylene nano fibrous membrane is preferably 40%~75%.Graft base in the present invention is polyethylene nano fibrous membrane, nanofiber film surface and inside in the present invention are nanofiber, with biggish specific surface area, and in the polyethylene nano fibrous membrane in the present invention nanofiber diameter between 10~100nm, to amidoxime group grafting rate with higher, the high efficiency of URANIUM IN SEAWATER is adsorbed to realize.The present invention also provides a kind of preparation methods of uranium absorption agent, and amidoxime group is grafted to the surface and inside of polyethylene nano fibrous membrane with irradiance method, improves grafting rate.
Description
Technical field
The invention belongs to polymer adsorbing material technical fields more particularly to a kind of uranium absorption agent and preparation method thereof.
Background technique
Uranium is the basic element of nuclear power station operation, it is mainly present in nature in two forms, and one is dissolved in sea
In water, two are deposited in the ore of land.Uranium mainly exists in the form of Uranyl carbornate in the seawater, and concentration is that 3.3ppb is uniform
Be present in seawater.Due to ocean bulky, the total amount of URANIUM IN SEAWATER is 4,500,000,000 tons, about the 1000 of land resources
Times.Therefore, uranium is extracted from seawater provide a kind of alternative route to have a great attraction meet our nuclear fuel need to obtain
The uranium asked.However, this technology ultimate challenge to be overcome is that uranium concentration in seawater is too low, the adsorption capacity of solid absorbent
Relatively low, therefore, it is necessary to the solid uranium absorption agent of bigger adsorption capacity.
However, be economically feasible the recycling uranium from seawater, solid absorbent must have characteristics that high-selenium corn
Rate, reusable property and to the highly selective of URANIUM IN SEAWATER.Amidoxime group is that extraction uranium is most widely used from seawater at present
Functional group, its chelation affinity with higher and the selectivity to uranyl ion in high salinity brine.But using together with amine
The usual absorption position of adsorbent material after oximido graft modification is only limitted to the surface of adsorbent material, limited sorption capacity, need to be into
One step improves.
Summary of the invention
Uranium absorption agent amidoxim the purpose of the present invention is to provide a kind of uranium absorption agent and preparation method thereof, in the present invention
Base grafting rate height and large specific surface area, have stronger uranium absorption ability.
The present invention provides a kind of uranium absorption agent, including polyethylene nano fibrous membrane and is grafted on the polyethylene nanofiber
Amidoxime group on film；
The polyethylene nano fibrous membrane is made of polyethylene porous fiber, the fibre diameter of the polyethylene porous fiber
For 10~100nm；The porosity of the polyethylene nano fibrous membrane is preferably 40%~75%.
Preferably, grafting rate of the amidoxime group on the polyethylene nano fibrous membrane is 10~300%.
The present invention provides a kind of preparation method of uranium absorption agent, comprising the following steps:
A polyethylene nano fibrous membrane) is subjected to radiation treatment, the polyethylene nano fibrous membrane after being irradiated；
The polyethylene nano fibrous membrane is made of polyethylene porous fiber, the fibre diameter of the polyethylene porous fiber
For 10~100nm；The porosity of the polyethylene nano fibrous membrane is preferably 40%~75%；
B) the polyethylene nano fibrous membrane after irradiation is immersed in grafted monomers solution, protective gas is passed through, is connect
Branch reaction, obtains modified polyethylene nano fibrous membrane；
The grafted monomers are acrylonitrile, acrylic acid, methacrylic acid, vinyl sulfonic acid, methylene-succinic acid and ethylene
One or more of base phosphoric acid；
C) the polyethylene nano fibrous membrane of the modification is immersed in the methanol aqueous solution containing hydroxylamine hydrochloride, is carried out anti-
It answers, obtains uranium absorption agent.
Preferably, the radiation source of the radiation treatment is cobalt source；The atmosphere of the radiation treatment is air atmosphere；The spoke
Irradiation dose according to processing is 50~100Gy/min.
Preferably, the accumulated dose of the radiation treatment is 50~200kGy.
Preferably, the volumetric concentration of grafted monomers is 5~80% in the grafted monomers solution.
Preferably, the temperature of the graft reaction is 40~70 DEG C；
The time of the graft reaction is 0.5~10 hour.
Preferably, the pH value of the methanol aqueous solution containing hydroxylamine hydrochloride is 6.0~8.0.
The present invention provides a kind of uranium absorption agent, including polyethylene nano fibrous membrane and it is grafted on the polyethylene Nanowire
Tie up the amidoxime group on film；The polyethylene nano fibrous membrane is made of polyethylene porous fiber, and the polyethylene porous is fine
The fibre diameter of dimension is 10~100nm；The porosity of the polyethylene nano fibrous membrane is preferably 40%~75%.In the present invention
Graft base be polyethylene nano fibrous membrane, the present invention in nanofiber film surface and inside be nanofiber, have
Biggish specific surface area, and in the polyethylene nano fibrous membrane in the present invention nanofiber diameter between 10~100nm, it is right
Amidoxime group grafting rate with higher adsorbs the high efficiency of URANIUM IN SEAWATER to realize.
The present invention also provides a kind of preparation method of uranium absorption agent, amidoxime group is connect with irradiance method in the present invention
Branch arrives the surface and inside of polyethylene nano fibrous membrane, improves grafting rate, further improves the adsorption efficiency to uranium.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the scanning electron microscope (SEM) photograph of polyethylene nanofiber film surface in the embodiment of the present invention 1；
Fig. 2 is the scanning electron microscope (SEM) photograph of polyethylene nano fibrous membrane section in the embodiment of the present invention 1；
Fig. 3 is the scanning electron microscope on the surface modified poly ethylene nano fibrous membrane AN-PENFM1 that the embodiment of the present invention 1 obtains
Figure；
Fig. 4 is the scanning electron microscope for the modified poly ethylene nano fibrous membrane AN-PENFM1 section that the embodiment of the present invention 1 obtains
Figure；
Fig. 5 is the scanning electron microscope (SEM) photograph on the uranium absorption agent surface that the embodiment of the present invention 1 obtains；
Fig. 6 is the scanning electron microscope on the surface modified poly ethylene nano fibrous membrane AN-PENFM2 that the embodiment of the present invention 2 obtains
Figure；
Fig. 7 is the scanning electron microscope for the modified poly ethylene nano fibrous membrane AN-PENFM2 section that the embodiment of the present invention 2 obtains
Figure；
Fig. 8 is the scanning electron microscope (SEM) photograph on the uranium absorption agent surface that the embodiment of the present invention 2 obtains；
Fig. 9 is the fourier transform infrared spectroscopy figure of uranium absorption agent in the embodiment of the present invention 2；
Figure 10 is the scanning electron microscope (SEM) photograph of polyethylene porous nano fibrous membrane in 4 number of the embodiment of the present invention, 1 experimental group；
Figure 11 is the scanning electron microscope (SEM) photograph of polyethylene porous nano fibrous membrane in 2 groups of 4 number of the embodiment of the present invention, wherein left
Figure is polyethylene porous nano fibrous membrane surface scan electron microscope, right figure be polyethylene porous nano fibrous membrane grafted propylene nitrile and
Acrylic acid rear surface scanning electron microscope (SEM) photograph；
Figure 12 is the scanning electron microscope (SEM) photograph of polyethylene porous nano fibrous membrane in 3 groups of 4 number of the embodiment of the present invention, wherein left
Figure is polyethylene porous nano fibrous membrane surface scan electron microscope, right figure be polyethylene porous nano fibrous membrane grafted propylene nitrile and
Acrylic acid rear surface profile scanning electron microscope.
Specific embodiment
The present invention provides a kind of uranium absorption agent, including polyethylene nano fibrous membrane and it is grafted on the polyethylene Nanowire
Tie up the amidoxime group on film；
The polyethylene nano fibrous membrane is made of polyethylene porous fiber, the fibre diameter of the polyethylene porous fiber
For 10~100nm；The porosity of the polyethylene nano fibrous membrane is preferably 40%~75%.
In the present invention, the fibre diameter of the polyethylene nano fibrous membrane is preferably 10~100nm, specifically, at this
In the embodiment of invention, 10~100nm can be.The porosity of the polyethylene nano fibrous membrane is preferably 40%~75%.
In the present invention, the polyethylene nano fibrous membrane is preferably prepared according to the following steps to obtain:
A after) mixing polyethylene raw material and solvent, after fusion extrusion casting method film, curtain coating oil film is obtained；
B) the curtain coating oil film for obtaining above-mentioned steps obtains semi-finished product after biaxial tension and thermal finalization；The two-way drawing
The longitudinal stretching ratio stretched is 5~8；The cross directional stretch ratio of the biaxial tension is 5~8；
The temperature of the biaxial tension is 90~120 DEG C
C) semi-finished product for obtaining above-mentioned steps are after extraction, obtained polyolefine micro/nano-fibre film.
Preferably, the polyethylene raw material includes ultra-high molecular weight polyethylene raw material；
The mass ratio of the polyethylene raw material and the solvent is 1:(1.5~4)；
The solvent includes one of white oil, soybean oil, peanut oil, olive oil and glyceride or a variety of.
Preferably, the polyethylene raw material molecular weight is 30~800,000；
It preferably, further include preheating step after the mixing；
The temperature of the preheating is 90~120 DEG C.
Preferably, the temperature of the melting extrusion is 220~235 DEG C；
The temperature of the curtain coating is 15~30 DEG C.
The temperature of the thermal finalization is 90~120 DEG C；
The time of the thermal finalization is 3~5min.
Preferably, the mode of the biaxial tension includes two-way asynchronous and/or synchro-draw；
The rate of extension of the biaxial tension is 1~5mm/s.
Preferably, the extraction is sizing extraction；
The extractant of the extraction includes in n-hexane, methylene chloride, pentane, heptane, carbon tetrachloride and dioxolane
It is one or more；
The extraction includes ultrasonic extraction.
In the present invention, grafting rate of the amidoxime group on the polyethylene nanofiber be preferably 10~
300%, more preferably 10~120%, most preferably 30~80%.
The present invention also provides a kind of preparation methods of uranium absorption agent, comprising the following steps:
A polyethylene nano fibrous membrane) is subjected to radiation treatment, the polyethylene nano fibrous membrane after being irradiated；
The polyethylene nano fibrous membrane is made of polyethylene porous fiber, the fibre diameter of the polyethylene porous fiber
For 10~100nm；The porosity of the polyethylene nano fibrous membrane is preferably 40%~75%；
B) the polyethylene nano fibrous membrane after irradiation is immersed and contains grafted monomers solution, is passed through protective gas, is carried out
Graft reaction obtains modified polyethylene nano fibrous membrane；
The grafted monomers are acrylic acid, methacrylic acid, vinyl sulfonic acid, in methylene-succinic acid and vinyl phosphoric acid
One or more；
C) the polyethylene nano fibrous membrane of the modification is immersed in the methanol aqueous solution containing hydroxylamine hydrochloride, is carried out anti-
It answers, obtains uranium absorption agent.
In the present invention, the preparation method of the polyethylene nanofiber preferably as described above is prepared.
In the present invention, the radiation treatment preferably uses cobalt source, and the radiation treatment preferably carries out under air atmosphere；
The dosage of the radiation treatment is preferably 50~100Gy/min, more preferably 60~90Gy/min, most preferably 70~80Gy/
Min, specifically, in an embodiment of the present invention, can be 76.4Gy/min.The irradiation accumulated dose of the radiation treatment is preferably
50~200kGy.
After polyethylene nano fibrous membrane after being irradiated, the present invention immerses the polyethylene nano fibrous membrane after irradiation
In grafted monomers solution, it is passed through protective gas, graft reaction is carried out, obtains modified polyethylene nano fibrous membrane；
In the present invention, the grafted monomers be preferably acrylonitrile or can be formed in the monomer of amidoxim fluidized polymer one
Kind or a variety of and hydrophilic monomer of offer, such as acrylic acid, methacrylic acid, vinyl sulfonic acid, methylene-succinic acid, vinyl
One of monomers such as phosphoric acid are a variety of.
The volumetric concentration of grafted monomers is preferably 5~80% in the grafted monomers solution, and more preferably 30~70%, more
Preferably 40~60%, most preferably 50~60%；Solvent in the grafted monomers solution is preferably DMF or DMSO.
The protective gas is preferably nitrogen or inert gas, described to be passed through nitrogen or the time of inert gas is preferably
15min or more, more preferably 20~40min, most preferably 30min.On the one hand solution can be excluded by being passed through nitrogen or inert gas
In air, on the other hand can give solution time enough makes it before graft reaction well into modified poly ethylene Nanowire
Inside the hole for tieing up film, make surface grafting of the grafted monomers not only in polyethylene nano fibrous membrane, additionally it is possible to connect in the inside of film
Branch improves grafting rate.
In the present invention, the temperature of the graft reaction is preferably 40~70 DEG C, and more preferably 60 DEG C；The graft reaction
It is preferred that being heated using water-bath or oil bath；The time of the graft reaction is preferably 0.5~10h, more preferably 4~6h, most
Preferably 6h；
After the completion of graft reaction, the present invention preferably washs obtained product, with remove homopolymer therein with not
The monomer of reaction.
After washing, the polyethylene nano fibrous membrane of the modification is immersed the methanol-water containing hydroxylamine hydrochloride by the present invention
It in solution, is reacted, obtains uranium absorption agent
In the present invention, in the methanol aqueous solution of the hydroxylamine hydrochloride, the mass concentration of hydroxylamine hydrochloride is preferably 3~
10%；The volume ratio of the methanol and water is preferably 1:1；Grafting rate is higher, and the concentration of hydroxylamine hydrochloride can properly increase, and
And the reaction time can also be extended, while modified polyethylene nano fibrous membrane can be immersed into fresh hydroxylamine hydrochloride again
In solution.
The pH value of the methanol aqueous solution containing hydroxylamine hydrochloride is preferably 6.0~8.0, contains azanol hydrochloric acid described
The temperature reacted in the methanol aqueous solution of salt is preferably 40~80 DEG C, more preferably 60~80 DEG C, most preferably 80 DEG C；Reaction
Time is preferably 24~72h.
The present invention provides a kind of uranium absorption agent, including polyethylene nano fibrous membrane and it is grafted on the polyethylene Nanowire
Tie up the amidoxime group on film；The polyethylene nano fibrous membrane is made of polyethylene porous fiber, and the polyethylene porous is fine
The fibre diameter of dimension is 10~100nm；The porosity of the polyethylene nano fibrous membrane is preferably 40%~75%.In the present invention
Graft base be polyethylene nano fibrous membrane, the present invention in nanofiber film surface and inside be nanofiber, have
Biggish specific surface area, and in the polyethylene nano fibrous membrane in the present invention nanofiber diameter between 10~100nm, it is right
Amidoxime group grafting rate with higher adsorbs the high efficiency of URANIUM IN SEAWATER to realize.
The present invention also provides a kind of preparation method of uranium absorption agent, amidoxime group is connect with irradiance method in the present invention
Branch arrives the surface and inside of polyethylene nano fibrous membrane, improves grafting rate, further improves the adsorption efficiency to uranium.
In order to further illustrate the present invention, with reference to embodiments to a kind of uranium absorption agent provided by the invention and its preparation
Method is described in detail, but cannot be understood as limiting the scope of the present invention.
Embodiment 1
By one piece of 20mg polyethylene porous nano fibrous membrane matrix (being denoted as PENFM), fibre diameter is 10~100nm, hole
Gap rate is 55%.It is used in air atmosphere at room temperature60The source Co (60Co radioactive source (China Science & Technology University, activity about 7.4
×1014Bq), dosage rate is demarcated with alanine/EPR Standard dosimeter.) irradiated, radiation resistance 76.4Gy/min, matrix
Inhaling total dosage of receiving is 100kGy.
Volumetric concentration now with monomer in the mixed solution containing grafted monomers is 60%, i.e. 24mL acrylonitrile, 6mL propylene
Acid and 20mLDMF, with long syringe needle insertion liquid level hereinafter, blasting nitrogen 30min to exclude the air in solution.
Then irradiated matrix is immersed into rapidly the DMF solution containing volumetric concentration 60% acrylonitrile and acrylic monomers
In, lead to nitrogen 30min at room temperature, then reaction system is put into the shaking table of 60 DEG C of water-baths and is heated, heating time 6h,
The fibrous matrix after grafting is taken out from solution again, by the washing of DMF and distilled water, gets rid of homopolymer therein and not
The monomer of reaction is dried overnight in 45 DEG C of vacuum ovens.Modified poly ethylene nano fibrous membrane is obtained, AN-PENFM1 is denoted as.
Modified poly ethylene nano fibrous membrane is immersed to the methanol aqueous solution for the hydroxylamine hydrochloride for being 5.3% containing mass concentration
In i.e. 5g hydroxylamine hydrochloride be dissolved in 50mL water and 50mL methanol mixed solution, the time for 24 hours is reacted at 80 DEG C, is washed with distilled water
It 3 times, is dried overnight in 45 DEG C of vacuum ovens.It obtains uranium absorption agent and is denoted as AO-PENFM1.Grafting rate is 33%.
Polyethylene nano fibrous membrane in embodiment 1 is analyzed using scanning electron microscope, obtains its surface and profile scanning
Electron microscope, as shown in Fig. 1~2.
Modified poly ethylene nano fibrous membrane AN-PENFM1 in embodiment 1 is analyzed using scanning electron microscope, obtains its table
Face and profile scanning electron microscope, as shown in figs. 34.
Uranium absorption agent AO-PENFM1 in embodiment 1 is analyzed using scanning electron microscope, obtains its surface scan Electronic Speculum
Figure, as shown in Figure 5.
Embodiment 2
According to the step in embodiment 1, difference is, it is 200kGy that matrix, which inhales total dosage of receiving, obtains modified poly ethylene and receives
Rice tunica fibrosa is denoted as AN-PENFM2.It obtains uranium absorption agent and is denoted as AO-PENFM2.Grafting rate is 126%.
Modified poly ethylene nano fibrous membrane AN-PENFM2 in embodiment 2 is analyzed using scanning electron microscope, obtains its table
Face and profile scanning electron microscope, as shown in figs. 6-7.
Uranium absorption agent AO-PENFM2 in embodiment 2 is analyzed using scanning electron microscope, obtains its surface scan Electronic Speculum
Figure, as shown in Figure 8.
Polyethylene nano fibrous membrane in embodiment 2 is analyzed using fourier transform infrared spectrometry, as shown in figure 9,
Wherein 2243cm-1Place peak is attributed to-CN, 1736cm-1Place peak is attributed to-C=O, 1683cm-1Place peak is attributed to-C=N-,
941cm-1Place peak is attributed to-N-O-, 3000-3700cm-1Place peak is attributed to-OH ,-NH2。
Embodiment 3
According to the step in Examples 1 and 2, difference is, monomer ratio is different in the mixed solution containing grafted monomers,
Respectively AN/AA (acrylonitrile/acrylic acid)=3/1,4/1,6/1,9/1, grafting rate is as follows:
| Number | Monomer ratio (AN/AA) | Irradiate total amount/kGy | Grafting rate |
| 1 | 3/1 | 100 | 36% |
| 2 | 4/1 | 100 | 24% |
| 3 | 6/1 | 100 | 49% |
| 4 | 3/1 | 200 | 33% |
| 5 | 4/1 | 200 | 34% |
| 6 | 6/1 | 200 | 126% |
Embodiment 4
According to the step in Examples 1 and 2, difference is, the hole of polyethylene porous nano fibrous membrane matrix used
Rate is different, as shown in the table:
| Number | Porosity | Irradiate accumulated dose/kGy | Monomer ratio (AN/AA) | Grafting rate |
| 1 | 32% | -- | -- | -- |
| 2 | 55% | 200 | 3/1 | 33% |
| 3 | 70% | 200 | 3/1 | 32% |
Modified poly ethylene nano fibrous membrane AN-PENFM in embodiment 4 is analyzed using scanning electron microscope, obtains its table
Surface scan electron microscope, as shown in Figure 10~12.Figure 10 is polyethylene porous Nanowire in 4 number of the embodiment of the present invention, 1 experimental group
Tie up the scanning electron microscope (SEM) photograph of film；Figure 11 is the scanning electron microscope of polyethylene porous nano fibrous membrane in 2 groups of 4 number of the embodiment of the present invention
Figure, wherein left figure is polyethylene porous nano fibrous membrane surface scan electron microscope, and right figure is that polyethylene porous nano fibrous membrane connects
Branch acrylonitrile and acrylic acid rear surface scanning electron microscope (SEM) photograph；Figure 12 is polyethylene porous Nanowire in 3 groups of 4 number of the embodiment of the present invention
Tie up the scanning electron microscope (SEM) photograph of film, wherein left figure is polyethylene porous nano fibrous membrane surface scan electron microscope, and right figure is that polyethylene is more
Hole nano fibrous membrane grafted propylene nitrile and acrylic acid rear surface scanning electron microscope (SEM) photograph.
Embodiment 5
Uranium absorption agent is prepared according to the step in embodiment 1, unlike, polyethylene nanofiber in the present embodiment
The fibre diameter of film is 10~100nm, porosity 70%.
Comparative example 1
Unlike embodiment 1-5, uranium absorption agent used in comparative example 1 is polyethylene porous nano fibrous membrane,
In, the fibre diameter of polyethylene nano fibrous membrane is 110~400nm, porosity 32% in comparative example.
Comparative example 2
Unlike embodiment 1-5, uranium absorption agent used in comparative example 2 is polyethylene porous nano fibrous membrane,
In, the fibre diameter of polyethylene nano fibrous membrane is 10~100nm, porosity 55% in comparative example.
The uranium absorption agent that embodiment and comparative example are obtained is immersed in the simulated seawater solution of configuration, and the concentration of uranium ion is
3.3ppb takes out after 56 days.
Using icp ms, above-mentioned uranium absorption agent absorption uranium ion is analyzed, such as 1 institute of table
Show.
The adsorption effect of uranium ion adsorbent in 1 the embodiment of the present application 1~2 and 5 of table and comparative example 1~2
| Embodiment 1 | Embodiment 2 | Embodiment 5 | Comparative example 1 | Comparative example 2 | |
| Porosity | 55% | 55% | 70% | 32% | 55% |
| Grafting rate | 33% | 126% | 32% | 0 | 0 |
| The suction (mg/g) of uranium ion | 2.8 | 4.5 | 3.2 | 0 | 0 |
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of uranium absorption agent, including polyethylene nano fibrous membrane and the amidoxim being grafted on the polyethylene nano fibrous membrane
Group；
The polyethylene nano fibrous membrane is made of polyethylene porous fiber, and the fibre diameter of the polyethylene porous fiber is 10
~100nm；The porosity of the polyethylene nano fibrous membrane is preferably 40%~75%.
2. a kind of uranium absorption agent according to claim 1, which is characterized in that the amidoxime group is received in the polyethylene
Grafting rate on rice tunica fibrosa is 10~300%.
3. a kind of preparation method of uranium absorption agent, comprising the following steps:
A polyethylene nano fibrous membrane) is subjected to radiation treatment, the polyethylene nano fibrous membrane after being irradiated；
The polyethylene nano fibrous membrane is made of polyethylene porous fiber, and the fibre diameter of the polyethylene porous fiber is 10
~100nm；The porosity of the polyethylene nano fibrous membrane is preferably 40%~75%；
B) the polyethylene nano fibrous membrane after irradiation is immersed in grafted monomers solution, is passed through protective gas, be grafted anti-
It answers, obtains modified polyethylene nano fibrous membrane；
The grafted monomers are acrylonitrile, acrylic acid, methacrylic acid, vinyl sulfonic acid, methylene-succinic acid and vinyl phosphorus
One or more of acid；
C) the polyethylene nano fibrous membrane of the modification is immersed in the methanol aqueous solution containing hydroxylamine hydrochloride, is reacted,
Obtain uranium absorption agent.
4. preparation method according to claim 3, which is characterized in that the radiation source of the radiation treatment is cobalt source；It is described
The atmosphere of radiation treatment is air atmosphere；The irradiation dose of the radiation treatment is 50~100Gy/min.
5. the preparation method according to claim 4, which is characterized in that the accumulated dose of the radiation treatment be 50~
200kGy。
6. preparation method according to claim 3, which is characterized in that the volume of grafted monomers in the grafted monomers solution
Concentration is 5~80%.
7. preparation method according to claim 3, which is characterized in that the temperature of the graft reaction is 40~70 DEG C；
The time of the graft reaction is 0.5~10 hour.
8. preparation method according to claim 3, which is characterized in that the methanol aqueous solution containing hydroxylamine hydrochloride
PH value is 6.0~8.0.
9. preparation method according to claim 3, which is characterized in that the step C) in react temperature be 40~80
℃；
The step C) in react time be 24~72h.
10. preparation method according to claim 3, which is characterized in that the methanol aqueous solution containing hydroxylamine hydrochloride
The mass concentration of middle hydroxylamine hydrochloride is 3~10%.
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Cited By (6)
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|---|---|---|---|---|
| CN112354528A (en) * | 2020-11-09 | 2021-02-12 | 海南大学 | Phosphoric acid functionalized sponge composite material for extracting uranium from seawater and preparation method thereof |
| CN113000034A (en) * | 2021-02-23 | 2021-06-22 | 浙江理工大学 | Preparation method of uranium ion affinity membrane based on natural plant polyphenol composite coating |
| CN114345146A (en) * | 2022-01-06 | 2022-04-15 | 中国科学技术大学 | Modified polypropylene oil-water separation membrane and preparation method thereof |
| CN114345141A (en) * | 2022-01-06 | 2022-04-15 | 中国科学技术大学 | Super-wettability modified polyolefin porous membrane, preparation method and application |
| CN114836982A (en) * | 2022-04-11 | 2022-08-02 | 上海大学 | Preparation method of fiber with hierarchical nanostructure and application of fiber in uranyl ion adsorption method |
| CN115254051A (en) * | 2022-07-12 | 2022-11-01 | 核工业北京化工冶金研究院 | Modified polypropylene hollow fiber membrane and preparation method and application thereof |
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| CN113000034A (en) * | 2021-02-23 | 2021-06-22 | 浙江理工大学 | Preparation method of uranium ion affinity membrane based on natural plant polyphenol composite coating |
| CN113000034B (en) * | 2021-02-23 | 2022-08-23 | 浙江理工大学 | Preparation method of uranium ion affinity membrane based on natural plant polyphenol composite coating |
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| CN114345141A (en) * | 2022-01-06 | 2022-04-15 | 中国科学技术大学 | Super-wettability modified polyolefin porous membrane, preparation method and application |
| CN114836982A (en) * | 2022-04-11 | 2022-08-02 | 上海大学 | Preparation method of fiber with hierarchical nanostructure and application of fiber in uranyl ion adsorption method |
| CN114836982B (en) * | 2022-04-11 | 2023-12-12 | 上海大学 | Preparation method of fiber with hierarchical nano structure and application of fiber in uranyl ion adsorption method |
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