CN106466593B - A kind of functionality mesoporous material and preparation method thereof - Google Patents
A kind of functionality mesoporous material and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of functional mesoporous materials and preparation method thereof.The functionality mesoporous material contains organic silane compound shown in mesoporous material, oligomerization styrene and formula (1), wherein R1、R2And R3It is each independently methyl, methoxyl group, ethyoxyl or chlorine, R1、R2And R3It is identical or different.The preparation method of the functionality mesoporous material includes: that (1) disperses mesoporous material in organic solvent to obtain fluid-mixing, the fluid-mixing, organic silane compound and alkaline agent are mixed under an inert atmosphere, obtain the mesoporous material modified by surface；(2) in the presence of initiator, the mesoporous material and styrene modified by surface are subjected to polymerization reaction under an inert atmosphere.The functional mesoporous material absorption property with higher of method according to the present invention preparation, it is especially significantly higher to the adsorbance of water pollutant benzene.
Description
Technical field
The present invention relates to field of functional materials, and in particular, to a kind of functionality mesoporous material, the functionality mesoporous material
Preparation method, and by this method prepare functional mesoporous material.
Background technique
It is reported from the researcher of Mobil in 1992 after having synthesized a series of order mesoporous aluminosilicate M41S materials,
For it is this have many advantages, such as uniform cellular structure, bigger serface mesoporous material research, it has also become numerous researchers
Focus of interest.Now, go deep into research, mesoporous material has been expanded in the appearance of various functional mesoporous materials significantly
Application range has many functional mesoporous materials now and is used in the fields such as analysis, environment, biology and medicine.
In environmental science, it is not strange to handle some environmental contaminants as medium to use mesoporous material, for example,
There are many researchers to be worked using the pre-treatment that mesoporous material carries out many environmental samples, and also there are many researcher is then direct
Mesoporous material is used for the purification of environment.Since the tap water benzene contamination accident of " 411 " Lanzhou, have as to human health
The pollution of the benzene of serious harm, and become the focus of environmental pollution, corresponding various new analysis methods also emerge in multitude out.
Go the material of benzene in water removal very more with absorption method, but mostly because adsorbance is small, the reasons such as desorption performance difference can not
The benzene being widely used in processing water.
Summary of the invention
The object of the present invention is to provide a kind of functional mesoporous material and preparation method thereof, the functionality mesoporous material for
Benzene in water has extraordinary adsorption capacity, and has excellent desorption performance concurrently, provides to remove benzene pollutant in water
New approach.
The present invention provides a kind of functional mesoporous materials, wherein the functionality mesoporous material contains mesoporous material, oligomerization
Organic silane compound shown in styrene and formula (1),
Wherein, R1、R2And R3It is each independently methyl, methoxyl group, ethyoxyl or chlorine, R1、R2And R3It is identical or different.
The present invention also provides a kind of preparation methods of functional mesoporous material, this method comprises: (1) divides mesoporous material
It dissipates in organic solvent to obtain fluid-mixing, by organic silane compound and alkali shown in the fluid-mixing, above-mentioned formula (1)
Agent is mixed under an inert atmosphere, obtains the mesoporous material modified by surface；It (2), will be described in the presence of initiator
Polymerization reaction is carried out under an inert atmosphere by the modified mesoporous material in surface and styrene.
The present invention also provides the functional mesoporous materials prepared by the above method.
Functionality mesoporous material according to the present invention, by being situated between with oligomerization styrene and organic silane compound modification
Porous materials, the oligomerization styrene can not only form backbone in the duct of mesoporous material but also can form network structure, while few
Phenyl ring on polystyrene chain can increase the interaction of the benzene to dissociate in hole wall and water, to improve the suction of mesoporous material
Attached performance.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the FTIR spectrum figure of functional mesoporous material prepared by embodiment 1 and mesoporous material SBA-15.
Fig. 2 is the XRD diagram of functional mesoporous material prepared by embodiment 1 and mesoporous material SBA-15.
Specific embodiment
Detailed description of the preferred embodiments below.It should be understood that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
According to an aspect of the present invention, the present invention provides a kind of functional mesoporous materials, wherein the functionality is mesoporous
Material contains organic silane compound shown in mesoporous material, oligomerization styrene and formula (1),
Wherein, R1、R2And R3It is each independently methyl, methoxyl group, ethyoxyl or chlorine, R1、R2And R3It is identical or different.
In the functional mesoporous material, organic silane compound shown in formula (1) can be to the surface of mesoporous material
It is modified, oligomerization styrene is at least partly attached on the hole wall by the duct of the modified mesoporous material in surface, forms length
Chain structure and or network structure, the phenyl ring on such oligomerization styrene can increase the phase interaction of the benzene to dissociate in hole wall and water
With so that the functionality mesoporous material is to the benzene absorption property with higher in water.
In the functional mesoporous material, it is preferable that the mesoporous material, the organic silane compound and the widow
The weight ratio of the content of polystyrene is 1:1-5:0.1-1.5, more preferably 1:1-3:0.2-1.2.
In the functional mesoporous material, the mesoporous material is preferably silicon-based mesoporous material.
It is further preferred that the mesoporous material is at least one of SBA-15, SBA-16, MCM-41 and MCM-48.
In the functional mesoporous material, organic silane compound shown in specific formula (1) is as shown in table 1 below:
Table 1
In a preferred embodiment, organic silane compound shown in formula (1) for example can be 3- (methacryl
Oxygen) propyl trimethoxy silicane, 3- (methacryloxypropyl) propyl-triethoxysilicane, 3- (methacryloxypropyl) dimethylamine
At least one of base oxethyl silane and 3- (methacryloxypropyl) propyltrichlorosilan.Most preferably, the organosilan
Compound is 3- (methacryloxypropyl) propyl trimethoxy silicane.
According to another aspect of the present invention, the present invention provides the preparation method of above-mentioned functional mesoporous material, the party
Method the following steps are included:
(1) above-mentioned mesoporous material is dispersed in organic solvent to obtain fluid-mixing, by the fluid-mixing, above-mentioned formula
(1) organic silane compound and alkaline agent shown in are mixed under an inert atmosphere, obtain the mesoporous material modified by surface；
(2) in the presence of initiator, under an inert atmosphere by the mesoporous material and styrene modified by surface
Carry out polymerization reaction.
In step (1), the dosage of the organic silane compound makes the functional mesoporous material intermediary hole material of preparation
The weight ratio of material and the content of organic silane compound is 1:1-5, preferably 1:1-3.In one embodiment, relative to 1g
The mesoporous material, the dosage of the organic silane compound can be 0.1-10mL, preferably 0.5-5mL.
In step (1), the dosage of the alkaline agent preferably so that it is described be mixed system (the i.e. described fluid-mixing,
The mixed system of the organic silane compound and alkaline agent) pH value be 8-9, more preferably 8.0-8.5.The alkaline agent can be
At least one of ammonium hydroxide and sodium hydroxide solution, most preferably ammonium hydroxide.The concentration of the ammonium hydroxide can be 25-28 weight %.
It is described to have during dispersing mesoporous material in organic solvent to obtain fluid-mixing in step (1)
There is no particular limitation for the dosage of solvent, as long as can guarantee that mesoporous material is fully dispersed, for example, relative to described in 1g
Mesoporous material, the dosage of the organic solvent are 10-100mL, preferably 15-50mL.The organic solvent can be N, N- bis-
Methylformamide and/or dimethyl sulfoxide, most preferably n,N-Dimethylformamide.
In step (1), mixed under an inert atmosphere by the fluid-mixing, the organic silane compound and alkaline agent
During contact, in order to make the mesoporous material obtain preferably surface treatment effect, preferably make the fluid-mixing, described
Organic silane compound and the alkaline agent are mixed with specific charging sequence, i.e., first the organic silane compound are added
In the fluid-mixing, alkaline agent is then added.
In step (2), the dosage of the styrene makes the functional mesoporous material intermediary Porous materials and oligomerization of preparation
The weight ratio of the content of styrene is 1:0.1-1.5, preferably 1:0.2-1.2.In one embodiment, relative to described in 1g
By the modified mesoporous material in surface, the dosage of styrene can be 0.1-1.5mL, preferably 0.2-1.2mL.
In step (2), relative to, by the mesoporous material that surface is modified, the dosage of the initiator can be described in 1g
0.1-5mg, preferably 0.5-3mg.
In step (2), the initiator can be with azo isobutyronitrile and/or dibenzoyl peroxide, most preferably azo
Isobutyronitrile.
In step (2), the condition of the polymerization reaction may include: that temperature is 50-100 DEG C, time 5-10h.
In step (2), the polymerization reaction is in the presence of a solvent.The solvent is preferably toluene.Relative to
By the mesoporous material that surface is modified described in 1g, the dosage of the solvent can be 1-50mL, preferably 5-30mL.It is further excellent
The reaction process of selection of land, step (2) operates in the following way: the mesoporous material for keeping surface modified is dispersed in solvent (such as toluene)
In, then it is added styrene, and with initiator initiated polymerization.
In step (1) and step (2), the inert atmosphere can be by being selected from least one of nitrogen and inert gas
Protective gas provides.
According to another aspect of the present invention, the present invention provides the functional mesoporous materials prepared by the above method.Such as
The functional mesoporous material absorption property with higher of this preparation, the adsorbent material particularly useful as water intoxication object benzene.
The invention will be further described by the following examples.
In the examples below, the test method of correlation performance parameters is as follows:
Embodiment 1
The present embodiment is for illustrating functional mesoporous material provided by the invention and preparation method thereof.
The mesoporous SBA-15 (being purchased from Nanjing Xian Feng Nono-material Science & Technology Ltd.) of 2.0g is dispersed in 50mL N, N- bis-
In methylformamide, stirring makes it be uniformly dispersed, and 4.0mL 3- (methacryloxypropyl) propyl trimethoxy silicane is then added,
2.0mL ammonium hydroxide (concentration is about 25 weight %) is slowly added to the charging rate of 2mL/min again, makes the pH value 8 of reaction system,
Reaction system is stirred at room temperature under nitrogen protection for 24 hours.After reaction, reaction mixture is filtered, then uses N respectively,
Dinethylformamide (DMF), deionized water, acetone washing obtained solid, are then dried in vacuo at 100 DEG C, obtain by
The modified mesoporous material in surface.
It weighs obtained by 1g by the mesoporous material that surface is modified, puts it into round-bottomed flask, be then added thereto
50mL toluene and 0.4mL styrene add 2mg azo isobutyronitrile, and stirring mixes it uniformly, later by mixture flow ultrasound
20min then under nitrogen protection reacts 8h at 70 DEG C, after reaction respectively obtained by toluene, ethyl alcohol, acetone washing
Product is finally dried in vacuum overnight under the conditions of 100 DEG C, obtains functional mesoporous material S1.
Embodiment 2
The present embodiment is for illustrating functional mesoporous material provided by the invention and preparation method thereof.
Functional mesoporous material is prepared according to the method for embodiment 1, the difference is that the additional amount of styrene is 0.8mL,
To which functional mesoporous material S2 be made.
Embodiment 3
The present embodiment is for illustrating functional mesoporous material provided by the invention and preparation method thereof.
The mesoporous SBA-15 (being purchased from Nanjing Xian Feng Nono-material Science & Technology Ltd.) of 2.0g is dispersed in 50mL dimethyl
In sulfoxide (DMSO), stirring makes it be uniformly dispersed, and 2.5mL 3- (methacryloxypropyl) dimethylamine base oxethyl is then added
Silane, then 2.0mL ammonium hydroxide (concentration is about 25 weight %) is slowly added to the charging rate of 2mL/min, make the pH of reaction system
Value is 8, and reaction system is stirred at room temperature under nitrogen protection for 24 hours.After reaction, reaction mixture is filtered, is then divided
Not Yong dimethyl sulfoxide, deionized water, acetone washing obtained solid, be then dried in vacuo at 100 DEG C, obtain changing by surface
The mesoporous material of property.
It weighs obtained by 1g by the mesoporous material that surface is modified, puts it into round-bottomed flask, be then added thereto
50mL toluene and 0.4mL styrene add 3mg azo isobutyronitrile, and stirring mixes it uniformly, later by mixture flow ultrasound
20min then under nitrogen protection reacts 8h at 75 DEG C, after reaction respectively obtained by toluene, ethyl alcohol, acetone washing
Product is finally dried in vacuum overnight under the conditions of 100 DEG C, obtains functional mesoporous material S3.
Embodiment 4
The present embodiment is for illustrating functional mesoporous material provided by the invention and preparation method thereof.
The mesoporous MCM-41 (being purchased from Nanjing Xian Feng Nono-material Science & Technology Ltd.) of 2.0g is dispersed in 50mL N, N- bis-
In methylformamide (DMF), stirring makes it be uniformly dispersed, and 4mL3- (methacryloxypropyl) propyltrichlorosilan is then added, then
It is slowly added to 2.0mL ammonium hydroxide (concentration is about 25 weight %) with the charging rate of 2mL/min, makes the pH value 8 of reaction system, connects
Reaction system is stirred at room temperature under nitrogen protection for 24 hours.After reaction, reaction mixture is filtered, then uses N, N- respectively
Dimethylformamide, deionized water, acetone washing obtained solid, are then dried in vacuo at 100 DEG C, obtain modified by surface
Mesoporous material.
It weighs obtained by 1g by the mesoporous material that surface is modified, puts it into round-bottomed flask, be then added thereto
50mL toluene and 0.4mL styrene add 4mg azo isobutyronitrile, and stirring mixes it uniformly, later by mixture flow ultrasound
20min then under nitrogen protection reacts 8h at 75 DEG C, after reaction respectively obtained by toluene, ethyl alcohol, acetone washing
Product is finally dried in vacuum overnight under the conditions of 100 DEG C, obtains functional mesoporous material S4.
Test case 1
The functional mesoporous material S1 prepared respectively to mesoporous material SBA-15 and embodiment 1 carries out infrared spectrum analysis,
Their own FTIR spectrum figure is as shown in Figure 1.
It will be seen from figure 1 that SBA-15 material and S1 material are in 3400cm-1And 1050cm-1There is very strong suction at place
Receive peak；And in the FTIR spectrum figure of S1 material, in 2930cm-1And 2810cm-1There is methylene (- CH in place2) it is asymmetric and
Symmetric vibration peak, meanwhile, in 1990cm-1And 1875cm-1Occurs obvious vibration peak at left and right, this is mainly that polystyrene is peculiar
A series of weaker bands of a spectrum, it is the frequency multiplication and the absorption of group frequency of aromatic hydrocarbons that they are corresponding.Thus illustrate, in S1 material, oligomerization
Styrene is successfully modified on SBA-15 material.
Test case 2
The functional mesoporous material S1 prepared respectively to mesoporous material SBA-15 and embodiment 1 carries out X-ray diffraction analysis,
Their own XRD diagram is as shown in Figure 2.
Figure it is seen that SBA-15 material has apparent diffraction maximum when 2 θ are 1.03 °, while S1 material is in 2 θ
Also there is apparent diffraction maximum at 1.05 °.In addition, all material, which is 1.7 °, 2.0 ° or so in 2 θ, there is second level and three-level diffraction
Thus peak illustrates that the S1 material of method according to the present invention preparation remains as ordered structure namely institute according to the present invention
The method of stating will not destroy the ordered mesopore structure of mesoporous SBA-15 material itself.
Test case 3
This test case is used to illustrate application of the functional mesoporous material of the present invention as adsorbent material.
Absorption test experience is carried out with mesoporous material SBA-15 and the functional mesoporous material S1-S4 of preparation.At normal temperature,
Dispersing concentration for the S1-S4 material of 20mg mesoporous material SBA-15 and preparation respectively is 1mgmL-15mL benzene aqueous solution
In, resulting mixed solution is continuously slowly stirred for 24 hours at room temperature, is filtered, is taken with 0.25 μm of filter membrane later
With in headspace gas chromatography (being purchased from Thermo Fischer Scient Inc. of the U.S., model IRIS/AP) method measurement filtrate after clear liquid dilution
Benzene concentration, experiment condition calculate separately out benzene in oligomerization styrene decorative material by the change of the concentration of aqueous solution of benzene
Adsorbance, the results are shown in Table 2.
Table 2
| Sample | Benzene adsorbance (mg/g) |
| SBA-15 | 176.34 |
| S1 | 220.24 |
| S2 | 203.66 |
| S3 | 207.92 |
| S4 | 195.35 |
It can be seen from the data of table 2 compared with SBA-15 mesoporous material, the function of method according to the present invention preparation
Energy property mesoporous material is apparently higher than mesoporous material SBA-15 to the adsorbance of water pollutant benzene.However, adding with styrene
Enter the increase of amount, absorption property decreases instead, and this is mainly due to when styrene is added, polymerization reaction is first occurred at
, will be longer in the oligomer chain that end group is formed with the increase of polymerized monomer additional amount at the port of mesoporous material, it holds at this time
Long-chain at mouthful hinders benzene and enters cellular structure, to reduce the interaction of functional group in benzene and duct, causes suction
Attached ability reduces, illustrate at this time the functional mesoporous material of method according to the present invention preparation to water pollutant benzene have compared with
Excellent absorption property.
Claims (15)
1. it is a kind of functionality mesoporous material, which is characterized in that the functionality mesoporous material contain mesoporous material, oligomerization styrene and
Organic silane compound shown in formula (1),
Formula (1)
Wherein, R1、R2And R3It is each independently methyl, methoxyl group, ethyoxyl or chlorine, R1、R2And R3It is identical or different；
The preparation method of the functional mesoporous material the following steps are included:
(1) mesoporous material is dispersed in organic solvent to obtain fluid-mixing, by the fluid-mixing, the organosilicon
Hydride compounds and alkaline agent are mixed under an inert atmosphere, obtain the mesoporous material modified by surface；
(2) in the presence of initiator, the mesoporous material and styrene modified by surface are carried out under an inert atmosphere
Polymerization reaction.
2. functionality mesoporous material according to claim 1, wherein the mesoporous material, the organic silane compound
Weight ratio with the content of the oligomerization styrene is 1:1-5:0.1-1.5.
3. functionality mesoporous material according to claim 2, wherein the mesoporous material, the organic silane compound
Weight ratio with the content of the oligomerization styrene is 1:1-3:0.2-1.2.
4. functional mesoporous material described in any one of -3 according to claim 1, wherein the mesoporous material is silicon substrate Jie
Porous materials.
5. functionality mesoporous material according to claim 4, wherein the mesoporous material is SBA-15, SBA-16, MCM-
At least one of 41 and MCM-48.
6. functional mesoporous material described in any one of -3 according to claim 1, wherein the organic silane compound is
3- (methacryloxypropyl) propyl trimethoxy silicane.
7. the preparation method of functional mesoporous material described in any one of claim 1-6, method includes the following steps:
(1) mesoporous material is dispersed in organic solvent to obtain fluid-mixing, by the fluid-mixing, the organosilicon
Hydride compounds and alkaline agent are mixed under an inert atmosphere, obtain the mesoporous material modified by surface；
(2) in the presence of initiator, the mesoporous material and styrene modified by surface are carried out under an inert atmosphere
Polymerization reaction.
8. according to the method described in claim 7, wherein, in step (1), the dosage of the alkaline agent makes described be mixed
System pH value be 8-9.
9. method according to claim 7 or 8, wherein the alkaline agent is at least one in ammonium hydroxide and sodium hydroxide solution
Kind.
10. according to the method described in claim 7, wherein, the organic solvent is n,N-Dimethylformamide and/or dimethyl
Sulfoxide.
11. according to the method described in claim 7, wherein, in step (2), relative to described in 1g by Jie that surface is modified
Porous materials, the dosage of styrene are 0.1-1.5 mL.
12. according to the method for claim 11, wherein in step (2), relative to Jie being modified described in 1g by surface
Porous materials, the dosage of styrene are 0.2-1.2 mL.
13. according to the method described in claim 7, wherein, the initiator is azo isobutyronitrile and/or diphenyl peroxide first
Acyl.
14. the condition of the polymerization reaction includes: that temperature is 50-100 DEG C according to the method described in claim 7, wherein, when
Between be 5-10h.
15. the functional mesoporous material of the preparation of the method as described in any one of claim 7-14.
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