CN108906003A - A kind of preparation method of the polypropylene-base adsorbent material based on poly-dopamine modified lithium - Google Patents
A kind of preparation method of the polypropylene-base adsorbent material based on poly-dopamine modified lithium Download PDFInfo
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- CN108906003A CN108906003A CN201810869708.9A CN201810869708A CN108906003A CN 108906003 A CN108906003 A CN 108906003A CN 201810869708 A CN201810869708 A CN 201810869708A CN 108906003 A CN108906003 A CN 108906003A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- 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
- B01J20/26—Synthetic macromolecular compounds
- B01J20/265—Synthetic macromolecular compounds modified or post-treated polymers
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
Abstract
The preparation method of the present invention provides a kind of polypropylene-base adsorbent material based on poly-dopamine modified lithium, to polypropylene nonwoven modification technology, method is simple, and easy to operate, reaction condition is mild, green non-pollution.Compared to conventional surface chemical modification method, chemical contamination is serious, and wastage of material is more, severe reaction conditions, and poly-dopamine modified lithium nanoparticle approach is simple, pollution-free, while the amino of heavy metal ion can be also adsorbed in polypropylene surface grafting.In addition, dissaving polymer be by two kinds of polymer hybrid reaction, using two kinds of polymer have a large amount of functional end group the advantages of, can according to the purposes of last polymer carry out MOLECULE DESIGN, be modified by a series of physical or chemical means.Using N,N-DMAA as crosslinking agent, ammonium persulfate is initiator, and HBP is grafted on PP-PDA cloth, and amine-terminated hyperbrancedization modified polypropylene melt-blown adsorbent material is made.
Description
Technical field
The invention belongs to polypropylene melt-blown material processing heavy metals ion fields, are related to one kind and are changed based on poly-dopamine
The preparation method of the polypropylene-base adsorbent material of property.
Background technique
With the fast development of modern industry, contains contents of many kinds of heavy metal ion in the industrial wastewater of discharge, water body is caused
Serious pollution, seriously jeopardizes drinking water safety and national health.The conventional lime neutralization precipitation method mainly used at present is
It is unable to satisfy the increasingly stringent environmental requirement in China, there is an urgent need to research and develop heavy metal waste water efficient deep purifying new method.
The method of currently used processing heavy metals mainly has chemical precipitation method, absorption method, ion-exchange.Including
(1) chemical precipitation method refers to puts into chemical reagent and pollutant reaction in waste water, and advantage is that at low cost, operation is more convenient.
But precipitating can be generated in chemical reaction, cause secondary pollution.(2) absorption method includes being adsorbed with adsorbent and with micro- in water
Biological adsorption, although low with the high regeneration efficiency of adsorbent absorption adsorption efficiency, water quality is not reached requirement, and cost is also very high；
Although will not be generated with microorganism adsorption, pollution, source is wide, price is low, will receive the influence of ambient enviroment and the PH of water
It influences.Meanwhile the structure of microorganism itself also will affect absorption property.It (3) is to adsorb simultaneously the advantages of ion-exchange
Heavy metal in waste water cation and anion, the disadvantage is that can not only consume a large amount of soda acid but also will cause secondary pollution.
For the difficult problem of heavy metal ions in wastewater depth removal, selection polypropylene fibre non-woven material is primary raw material, with
Deep purifying is target, to prepare efficient heavy-metal adsorption material.Due to polypropylene surface non-polar group, be difficult with it is water-soluble
Liquid infiltration, this brings great limitation to the extensive use of PP material.There is the base that can adsorb heavy metal on dopamine surface
Group-NH2.Therefore poly-dopamine will be grafted on polypropylene non-woven fabric, meanwhile, in order to further enhance the property of absorption heavy metal
Can, it will also be using N,N-DMAA as crosslinking agent, ammonium persulfate is initiator, and HBP is grafted on PP-PDA cloth, is made
Obtain amine-terminated hyperbrancedization improved polypropylene non-woven material.
Summary of the invention
The purpose of the invention is to provide a kind of preparation side of polypropylene-base adsorbent material based on poly-dopamine modified lithium
Method, the deficiency being able to solve in existing production process.
To solve the above problems, the technical solution adopted in the present invention is as follows：
A kind of preparation method of the polypropylene-base adsorbent material based on poly-dopamine modified lithium, includes the following steps：
Prepare PP/PDA polypropylene fibre non-woven material；
Prepare dissaving polymer solution；And
The PP/PDA polypropylene fibre non-woven material is impregnated into the dissaving polymer solution, and is to cause with ammonium persulfate
Agent, using N,N-DMAA as crosslinking agent, HBP is grafted on the PP/PDA polypropylene fibre non-woven material, prepare end
The hyperbranched modified polypropylene melt-blown adsorbent material of amino.
Preferably, in above-mentioned preparation method, preparation PP/PDA polypropylene fibre non-woven material includes：
Prepare Tris-HCl buffer；
PP melt-blown material is put into autohemagglutination in the Tris-HCl buffer and deposits dopamine, obtains initial p P/PDA polypropylene fibre
Non-woven material；And
The initial p P/PDA polypropylene fibre non-woven material is handled, the PP/PDA polypropylene fibre non-woven material is obtained.
Preferably, in above-mentioned preparation method, Tris-HCl buffer is prepared, including：
Prepare Tris buffer；
Hydrochloric acid is added in the Tris buffer, adjusts pH value to 8.5；
Wherein, the hydrochloric acid is 1% hydrochloric acid.
Preferably, in above-mentioned preparation method, PP melt-blown material is put into the Tris-HCl buffer from coagulation
Product dopamine obtains initial p P/PDA polypropylene fibre non-woven material, including：
Dopamine hydrochloride is added in the Tris-HCl buffer and prepares dopamine solution；
The PP melt-blown material is put into beaker, the first preset time of magnetic agitation under the first preset temperature.
Preferably, in above-mentioned preparation method, first preset temperature includes 20 DEG C~80 DEG C, and described first is default
Time includes 12 hours~36 hours.
Preferably, in above-mentioned preparation method, the initial p P/PDA polypropylene fibre non-woven material is handled, is obtained
The PP/PDA polypropylene fibre non-woven material, including：
The initial p P/PDA polypropylene fibre non-woven material is taken out, is cleaned repeatedly with deionized water, removal material surface is extra
Then unreacted dopamine, low temperature drying balance the second preset time between constant temperature and humidity；
Wherein, second preset time includes 8 hours~16 hours.
Preferably, in above-mentioned preparation method, dissaving polymer solution is prepared, including：
According to molar ratio 1：1 weighs methyl acrylate and tetraethylenepentamine；
Methanol is obtained, the methanol is added in the e pioic acid methyl ester, is uniformly mixed；
Tetraethylenepentamine is poured into the first container, then the mixed solution of methanol and methyl acrylate is poured into second container
In, and screw, the second container screwed is inserted into the first container；
Drain the air in the first container；
The second container is unscrewed, so that the mixed solution of the methanol and methyl acrylate instills the first container
In, after mixed solution drop is most, adjust the temperature to the second preset temperature constant temperature stirring third preset time；
Then, then in distilling apparatus, it is to slowly warm up to third preset temperature, and keeps the temperature the 4th preset time of distillation, from
What obtains the dissaving polymer solution.
Preferably, in above-mentioned preparation method, second preset temperature includes 20 DEG C~40 DEG C, and the third is default
Time includes 2 hours~5 hours, and the third preset temperature includes 120 DEG C~200 DEG C, and the 4th preset time includes 2 small
When~6 hours
Preferably, in above-mentioned preparation method, and using ammonium persulfate it is as initiator, with N,N-DMAA
HBP is grafted on the PP/PDA polypropylene fibre non-woven material by crosslinking agent, including：
Under the 4th preset temperature, the PP/PDA polypropylene fibre non-woven material is impregnated into the dissaving polymer solution
In, prepare amine-terminated hyperbrancedization modified polypropylene melt-blown adsorbent material；
Wherein, the concentration of the ammonium persulfate includes 0.8%~1.5%, and N,N-DMAA concentration includes
0.1%~0.3%, HBP concentration include 8%~12%.
Compared with prior art, the beneficial effects of the present invention are：
In the preparation method of the polypropylene-base adsorbent material provided by the invention based on poly-dopamine modified lithium, to polypropylene
Non-woven material modification technology, method is simple, easy to operate, and reaction condition is mild, green non-pollution.Compared to conventional surface chemistry
Method of modifying, chemical contamination is serious, and wastage of material is more, severe reaction conditions, and poly-dopamine modified lithium nanoparticle approach letter
It is single, pollution-free, while the amino of heavy metal ion can be also adsorbed in polypropylene surface grafting.In addition, dissaving polymer is
It, the advantages of having a large amount of functional end group using two kinds of polymer, can be according to last poly- by two kinds of polymer hybrid reaction
The purposes for closing object carries out MOLECULE DESIGN, is modified by a series of physical or chemical means.With N, N- dimethyl allene acyl
Amine is crosslinking agent, and ammonium persulfate is initiator, and HBP is grafted on PP-PDA cloth, and amine-terminated hyperbrancedization modified polypropene is made
It is meltblown adsorbent material.
Detailed description of the invention
The process of the preparation method of polypropylene-base adsorbent material in Fig. 1 embodiment of the present invention based on poly-dopamine modified lithium is shown
It is intended to；
Fig. 2 is the flow diagram that PP/PDA polypropylene fibre non-woven material is prepared in one embodiment of the application.
Specific embodiment
Invention is further described in detail With reference to embodiment.
The preparation method of the present invention provides a kind of polypropylene-base adsorbent material based on poly-dopamine modified lithium, such as Fig. 1 institute
Show, Fig. 1 is the process signal of the preparation method of the polypropylene-base adsorbent material based on poly-dopamine modified lithium in the embodiment of the present invention
Figure.Specifically, shown method includes：Step S101 prepares PP/PDA polypropylene fibre non-woven material；Step S103 is prepared hyperbranched
Polymer solution；The PP/PDA polypropylene fibre non-woven material is impregnated the dissaving polymer solution, prepares end by step S105
The hyperbranched modified polypropylene melt-blown adsorbent material of amino.
In above-mentioned steps S101, PP/PDA polypropylene fibre non-woven material is prepared.
Specifically, as shown in Fig. 2, Fig. 2 is the process for preparing PP/PDA polypropylene fibre non-woven material in one embodiment of the application
Schematic diagram.Including：
Step S1011 prepares Tris-HCl buffer.
Specifically, preparing Tris buffer；Hydrochloric acid is added in the Tris buffer, adjusts pH value to 8.5；Wherein,
The hydrochloric acid is 1% hydrochloric acid.
In some embodiments of the present application, the Tris buffer of 10mmol is first prepared, 1% hydrochloric acid of autogamy is added
(HCl) PH to 8.5 is adjusted, to obtain the Tris-HCl buffer.
PP melt-blown material is put into autohemagglutination in the Tris-HCl buffer and deposits dopamine, obtained initial by step S1013
PP/PDA polypropylene fibre non-woven material.
In some embodiments of the present application, dopamine hydrochloride is added in the Tris-HCl buffer and prepares DOPA
Amine aqueous solution；The PP melt-blown material is put into beaker, the first preset time of magnetic agitation under the first preset temperature.Wherein, institute
Stating the first preset temperature includes 20 DEG C~80 DEG C, and first preset time includes 12 hours~36 hours.
Specifically, Tris-HCl is added in the dopamine hydrochloride for weighing certain mass in some embodiments of the present application
The dopamine solution that 2g/L is prepared in buffer, changes simultaneously bath raio and PP melt-blown material is put into beaker, (20 under different temperatures
DEG C, 30 DEG C, 40 DEG C, 50 DEG C, 60 DEG C) magnetic agitation stirring for 24 hours.
And step S1015, the initial p P/PDA polypropylene fibre non-woven material is handled, the PP/PDA third is obtained
Synthetic fibre non-woven material.
Specifically, taking out the initial p P/PDA polypropylene fibre non-woven material, cleaned repeatedly with deionized water, removes material table
Then the extra unreacted dopamine in face, low temperature drying balance the second preset time between constant temperature and humidity；Wherein, described second
Preset time includes 8 hours~16 hours.
In above-mentioned steps 103, dissaving polymer solution is prepared, including：
Firstly, according to molar ratio 1：1 weighs methyl acrylate and tetraethylenepentamine；In some embodiments of the application, press
According to molar ratio 1：1 weighs the methyl acrylate of 43.045g and the tetraethylenepentamine of 94.65g.
Then, methanol is obtained, the methanol is added in the e pioic acid methyl ester, is uniformly mixed；Specifically, being measured with graduated cylinder
The methanol of 100ml, methanol is poured into methyl acrylate, is uniformly mixed.
Next, tetraethylenepentamine is poured into the first container, then the mixed solution of methanol and methyl acrylate is poured into
It in second container, and screws, the second container screwed is inserted into the first container；In one embodiment of the application,
Tetraethylenepentamine is poured into three-necked flask, then the mixed solution of methanol and methyl acrylate is poured into buret and is screwed,
Thermometer is inserted into three-necked flask.
Then, the air in the first container is drained；In one embodiment of the application, three-necked flask can be placed in collection
In hot type constant-temperature heating magnetic stirring apparatus, logical nitrogen 2-3min drains the air in flask.
Next, unscrew the second container, so that the mixed solution of the methanol and methyl acrylate instills described the
In one container, after mixed solution drop is most, the second preset temperature constant temperature stirring third preset time is adjusted the temperature to；Its
In, second preset temperature includes 20 DEG C~40 DEG C, and the third preset time includes 2 hours~5 hours.Example is connected, is revolved
Buret is opened, rate of titration is adjusted, to the greatest extent to the mixed solution of methanol and methyl acrylate drop, adjusts the temperature to 28 DEG C of constant temperature magnetic force
Stir 4h.
Then, then in distilling apparatus, it is to slowly warm up to third preset temperature, and keeps the temperature the 4th preset time of distillation, from
What obtains the dissaving polymer solution.Wherein, the third preset temperature includes 120 DEG C~200 DEG C, and the described 4th is default
Time includes 2 hours~6 hours.In one embodiment of the application, in distilling apparatus, 150 DEG C are to slowly warm up to, and keep the temperature steaming
Evaporate 5h.
In above-mentioned steps S105, and using ammonium persulfate as initiator, using N,N-DMAA as crosslinking agent, will
HBP is grafted on the PP/PDA polypropylene fibre non-woven material, including：
Under the 4th preset temperature, the PP/PDA polypropylene fibre non-woven material is impregnated into the dissaving polymer solution
In, prepare amine-terminated hyperbrancedization modified polypropylene melt-blown adsorbent material；
Wherein, the concentration of the ammonium persulfate includes 0.8%~1.5%, and N,N-DMAA concentration includes
0.1%~0.3%, HBP concentration include 8%~12%.In one embodiment of the application, the 4th preset temperature includes 30 DEG C
~60 DEG C, preferably, being 50 DEG C.
Next, being illustrated with 5 specific embodiments.
Example 1
A kind of preparation method of the polypropylene-base adsorbent material based on poly-dopamine modified lithium, specifically includes step：
The preparation of step 1, PP/PDA non-woven material
The Tris-HCl buffer that 10mmol, PH are 8.5 is prepared, 2g/L dopamine solution is put into polypropylene melt-blown material,
Bath raio is 1:1000,50 DEG C of temperature constant magnetic stirrings for 24 hours, take out after cleaning up, 40 DEG C of low temperature dryings；
The preparation of step 2, PP/PDA/HBP non-woven material
According to molar ratio 1:1 weighs the methyl acrylate of 43.045g and the tetraethylenepentamine preparation hyperbranched poly of 94.65g
Close object.Step 1 gained PP/PDA non-woven material is put into dissaving polymer solution, bath raio 1:270 prepare solution,
Middle N,N-DMAA concentration is 0.2%, ammonium persulfate concentrations 1%, and HBP concentration is 10%；Respectively in room temperature (20
DEG C), 40 DEG C, 50 DEG C, 60 DEG C, 70 DEG C, react 2h at 80 DEG C；Cleaning, 40 DEG C of low temperature dryings, weighing.
Example 2
A kind of preparation method of the polypropylene-base adsorbent material based on poly-dopamine modified lithium, specifically includes step：
The preparation of step 1, PP/PDA non-woven material
The Tris-HCl buffer that 10mmol, PH are 8.5 is prepared, 2g/L dopamine solution is put into polypropylene melt-blown material,
Bath raio is 1:1000,50 DEG C of temperature constant magnetic stirrings for 24 hours, take out after cleaning up, 40 DEG C of low temperature dryings；
The preparation of step 2, PP/PDA/HBP non-woven material
According to molar ratio 1:1 weighs the methyl acrylate of 43.045g and the tetraethylenepentamine preparation hyperbranched poly of 94.65g
Close object.Step 1 gained PP/PDA non-woven material is put into dissaving polymer solution, bath raio 1:270 prepare solution,
Middle temperature is 50 DEG C, and N,N-DMAA concentration is that 0.2%, HBP concentration is 10%；Ammonium persulfate concentrations are respectively
0.5%, 1%, 1.5%, 2%.50 DEG C of magnetic agitation 2h of constant temperature water bath；Cleaning, 40 DEG C of low temperature dryings, weighing.
Example 3
A kind of preparation method of the polypropylene-base adsorbent material based on poly-dopamine modified lithium, specifically includes step：
The preparation of step 1, PP/PDA non-woven material
The Tris-HCl buffer that 10mmol, PH are 8.5 is prepared, 2g/L dopamine solution is put into polypropylene melt-blown material,
Bath raio is 1:1000,50 DEG C of temperature constant magnetic stirrings for 24 hours, take out after cleaning up, 40 DEG C of low temperature dryings；
The preparation of step 2, PP/PDA/HBP non-woven material
According to molar ratio 1:1 weighs the methyl acrylate of 43.045g and the tetraethylenepentamine preparation hyperbranched poly of 94.65g
Close object.Step 1 gained PP/PDA non-woven material is put into dissaving polymer solution, bath raio 1:270 prepare solution,
Middle temperature is 50 DEG C, ammonium persulfate concentrations 1%, and HBP concentration is 10%；N, N- dimethacrylamide concentration is respectively
0.1%, 50 DEG C of magnetic agitation 2h of constant temperature water bath under the conditions of 0.15%, 0.2%, 0.25%, 0.3%；Cleaning, 40 DEG C of low temperature dry
Dry, weighing.
Example 4
A kind of preparation method of the polypropylene-base adsorbent material based on poly-dopamine modified lithium, specifically includes step：
The preparation of step 1, PP/PDA non-woven material
The Tris-HCl buffer that 10mmol, PH are 8.5 is prepared, 2g/L dopamine solution is put into polypropylene melt-blown material,
Bath raio is 1:1000,50 DEG C of temperature constant magnetic stirrings for 24 hours, take out after cleaning up, 40 DEG C of low temperature dryings；
The preparation of step 2, PP/PDA/HBP non-woven material
According to molar ratio 1:1 weighs the methyl acrylate of 43.045g and the tetraethylenepentamine preparation hyperbranched poly of 94.65g
Close object.Step 1 gained PP/PDA non-woven material is put into dissaving polymer solution, bath raio 1:270 prepare solution,
Middle temperature is 50 DEG C, ammonium persulfate concentrations 1%, and N,N-DMAA concentration is 0.2%；HBP concentration is respectively
6%, 50 DEG C of magnetic agitation 2h of constant temperature water bath under the conditions of 8%, 10%, 12%, 15%, 20%；Cleaning, claims 40 DEG C of low temperature dryings
Weight.
Example 5
A kind of preparation method of the polypropylene-base adsorbent material based on poly-dopamine modified lithium, specifically includes step：
The preparation of step 1, PP/PDA non-woven material
The Tris-HCl buffer that 10mmol, PH are 8.5 is prepared, 2g/L dopamine solution is put into polypropylene melt-blown material,
Bath raio is 1:1000,50 DEG C of temperature constant magnetic stirrings for 24 hours, take out after cleaning up, 40 DEG C of low temperature dryings；
The preparation of step 2, PP/PDA/HBP non-woven material
According to molar ratio 1:1 weighs the methyl acrylate of 43.045g and the tetraethylenepentamine preparation hyperbranched poly of 94.65g
Close object.Step 1 gained PP/PDA non-woven material is put into dissaving polymer solution, bath raio 1:270 prepare solution,
Middle temperature is 50 DEG C, and ammonium persulfate concentrations 1%, N,N-DMAA concentration is that 0.2%, HBP concentration is 10%；When
Between be respectively 1h, 2h, 3h, 4h, 5h under the conditions of 50 DEG C of magnetic agitations of constant temperature water bath；Cleaning, 40 DEG C of low temperature dryings, weighing.
The above, temperature be 50 DEG C, stirring for 24 hours when PP be grafted dopamine effect it is best.PP-PDA grafting HBP most preferably connects
Branch rate process conditions be：Temperature is 70 DEG C, time 4h, ammonium persulfate concentrations 1.5%, N, and N- dimethacrylamide is dense
Degree is 0.25%, HBP concentration is 10%.Dopamine and dissaving polymer effectively improve the adsorptivity of polypropylene non-woven fabric
Can, it is because polypropylene non-woven fabric is grafted upper amino.Any person skilled in the art is not departing from the technology of the present invention side
Within the scope of case, when the technology contents using the disclosure above make a little change or are modified to the equivalent embodiment of equivalent variations,
But anything that does not depart from the technical scheme of the invention content, according to the technical essence of the invention any letter to the above embodiments
Single modification, equivalent variations and modification, all of which are still within the scope of the technical scheme of the invention.
In the preparation of the polypropylene-base adsorbent material based on poly-dopamine modified lithium of bright offer provided in an embodiment of the present invention
In method, to polypropylene nonwoven modification technology, method is simple, and easy to operate, reaction condition is mild, green non-pollution.Phase
Than in conventional surface chemical modification method, chemical contamination is serious, and wastage of material is more, severe reaction conditions, and poly-dopamine changes
Property nanoparticle approach it is simple, pollution-free, while can also adsorb the amino of heavy metal ion in polypropylene surface grafting.This
Outside, dissaving polymer is by two kinds of polymer hybrid reaction, using two kinds of polymer with the excellent of a large amount of functional end group
Point can carry out MOLECULE DESIGN according to the purposes of last polymer, is modified by a series of physical or chemical means.With
N,N-DMAA is crosslinking agent, and ammonium persulfate is initiator, and HBP is grafted on PP-PDA cloth, and Amino End Group is made
Hyperbranched modified polypropylene melt-blown adsorbent material.
It will be apparent to those skilled in the art that can make various other according to the above description of the technical scheme and ideas
Corresponding change and deformation, and all these changes and deformation all should belong to the protection scope of the claims in the present invention
Within.
Claims (9)
1. a kind of preparation method of the polypropylene-base adsorbent material based on poly-dopamine modified lithium, which is characterized in that including following step
Suddenly：
Prepare PP/PDA polypropylene fibre non-woven material；
Prepare dissaving polymer solution；And
The PP/PDA polypropylene fibre non-woven material is impregnated into the dissaving polymer solution, and using ammonium persulfate as initiator,
Using N,N-DMAA as crosslinking agent, HBP is grafted on the PP/PDA polypropylene fibre non-woven material, Amino End Group is prepared
Hyperbranched modified polypropylene melt-blown adsorbent material.
2. preparation method as described in claim 1, which is characterized in that preparing PP/PDA polypropylene fibre non-woven material includes：
Prepare Tris-HCl buffer；
PP melt-blown material is put into the Tris-HCl buffer autohemagglutination and deposits dopamine, obtains that initial p P/PDA polypropylene fibre is non-to be knitted
Producing material material；And
The initial p P/PDA polypropylene fibre non-woven material is handled, the PP/PDA polypropylene fibre non-woven material is obtained.
3. preparation method as claimed in claim 2, which is characterized in that Tris-HCl buffer is prepared, including：
Prepare Tris buffer；
Hydrochloric acid is added in the Tris buffer, adjusts pH value to 8.5；
Wherein, the hydrochloric acid is 1% hydrochloric acid.
4. preparation method as claimed in claim 2, which is characterized in that PP melt-blown material is put into the Tris-HCl buffer
Middle autohemagglutination deposits dopamine, obtains initial p P/PDA polypropylene fibre non-woven material, including：
Dopamine hydrochloride is added in the Tris-HCl buffer and prepares dopamine solution；
The PP melt-blown material is put into beaker, the first preset time of magnetic agitation under the first preset temperature.
5. preparation method as claimed in claim 4, which is characterized in that first preset temperature includes 20 DEG C~80 DEG C, institute
Stating the first preset time includes 12 hours~36 hours.
6. preparation method as claimed in claim 2, which is characterized in that carried out to the initial p P/PDA polypropylene fibre non-woven material
Processing, obtains the PP/PDA polypropylene fibre non-woven material, including：
The initial p P/PDA polypropylene fibre non-woven material is taken out, is cleaned repeatedly with deionized water, removal material surface is not extra anti-
Then the dopamine answered, low temperature drying balance the second preset time between constant temperature and humidity；
Wherein, second preset time includes 8 hours~16 hours.
7. preparation method as described in claim 1, which is characterized in that dissaving polymer solution is prepared, including：
According to molar ratio 1：1 weighs methyl acrylate and tetraethylenepentamine；
Methanol is obtained, the methanol is added in the e pioic acid methyl ester, is uniformly mixed；
Tetraethylenepentamine is poured into the first container, then the mixed solution of methanol and methyl acrylate is poured into second container,
And screw, the second container screwed is inserted into the first container；
Drain the air in the first container；
The second container is unscrewed, so that the mixed solution of the methanol and methyl acrylate instills in the first container, to
After the mixed solution drop is most, the second preset temperature constant temperature stirring third preset time is adjusted the temperature to；
Then, then in distilling apparatus, it is to slowly warm up to third preset temperature, and keeps the temperature the 4th preset time of distillation, is obtained from what
Obtain the dissaving polymer solution.
8. preparation method as claimed in claim 7, which is characterized in that second preset temperature includes 20 DEG C~40 DEG C, institute
Stating third preset time includes 2 hours~5 hours, and the third preset temperature includes 120 DEG C~200 DEG C, and the described 4th is default
Time includes 2 hours~6 hours.
9. preparation method as described in claim 1, which is characterized in that and using ammonium persulfate as initiator, with N, N- dimethyl
Acrylamide is crosslinking agent, and HBP is grafted on the PP/PDA polypropylene fibre non-woven material, including：
Under the 4th preset temperature, the PP/PDA polypropylene fibre non-woven material is impregnated in the dissaving polymer solution, system
Standby amine-terminated hyperbrancedization modified polypropylene melt-blown adsorbent material；
Wherein, the concentration of the ammonium persulfate include 0.8%~1.5%, N,N-DMAA concentration include 0.1%~
0.3%, HBP concentration include 8%~12%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810869708.9A CN108906003A (en) | 2018-08-02 | 2018-08-02 | A kind of preparation method of the polypropylene-base adsorbent material based on poly-dopamine modified lithium |
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| CN113880182A (en) * | 2021-09-26 | 2022-01-04 | 宁波方太厨具有限公司 | Preparation method of modified activated carbon filter element |
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