CN113351183A - Magnetic response type nylon adsorption material and preparation method thereof - Google Patents

Magnetic response type nylon adsorption material and preparation method thereof Download PDF

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CN113351183A
CN113351183A CN202110666769.7A CN202110666769A CN113351183A CN 113351183 A CN113351183 A CN 113351183A CN 202110666769 A CN202110666769 A CN 202110666769A CN 113351183 A CN113351183 A CN 113351183A
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nylon
base material
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CN113351183B (en
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侯成敏
钱志云
杨佳琦
严薇
刘甜
张兴
张�杰
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Shenzhen Lizhuan Technology Transfer Center Co ltd
Shenzhen Xibang New Material Co ltd
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Xian University of Technology
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    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Abstract

The invention discloses a preparation method of a magnetic response type nylon adsorbing material, which is implemented according to the following steps: firstly, carrying out polymerization reaction on pretreated nylon, ferric chloride, ferrous sulfate and sodium hydroxide to prepare a nylon base material; then, the nylon substrate material is aminated by using an amino functional substance; and then, carrying out a composite reaction on the aminated nylon base material and an acrylic polymer to obtain the magnetic response type nylon adsorbing material. The magnetic response type nylon adsorbing material is low in cost, non-toxic, harmless, environment-friendly and good in dispersibility in wastewater, and the acrylic polymer is of a multifunctional polymer structure; the adsorbent material can be widely applied to the fields of wastewater treatment of electroplating wastewater, dye wastewater, metal mine exploitation, smelting and the like.

Description

Magnetic response type nylon adsorption material and preparation method thereof
Technical Field
The invention belongs to the technical field of polymer materials, and particularly relates to a magnetic response type nylon adsorbing material and a preparation method of the magnetic response type nylon adsorbing material.
Background
The industrial development speed of China is faster and faster, and the problem of heavy metal pollution is widely concerned by the society. Heavy metal ions in the wastewater have mobility and biotoxicity, so that the heavy metal ions not only pose great threat to an ecological system, but also generate great harm to human health. At present, heavy metal ions comprise a chemical method, a biological method, an ion exchange method, a membrane separation method, an adsorption method and the like, wherein the adsorption method is simple and convenient, strong in operability, low in cost and wide in application range, but has the problem that an adsorbent is difficult to recover.
CN106315739A discloses a method for adsorbing chromium ions by using functionalized magnetic ferroferric oxide, which is mainly technically characterized in that: firstly, synthesizing magnetic ferroferric oxide, functionalizing the magnetic ferroferric oxide by cetyl trimethyl ammonium bromide and 2-thenoyl trifluoroacetone to obtain functionalized magnetic ferroferric oxide, and functionalizing the functionalized magnetic ferroferric oxide on Cr under certain conditions3+The maximum adsorption capacity of the magnetic ferroferric oxide is 1000mg/g or even higher, the adsorbed functional magnetic ferroferric oxide can be desorbed by hydrochloric acid (HCl) with certain concentration, and the desorption rate reaches 95.88%. The maximum adsorption capacity of the secondary adsorption of the regenerative functionalized magnetic ferroferric oxide is 957.8 mg/g.
CN111229170A discloses an amino acid modified cellulose composite ferric oxide adsorbent, a preparation method and an application thereof, and the main technical characteristics are that: firstly, adding microcrystalline cellulose into a sodium hydroxide-urea-thiourea mixed solution, uniformly stirring, and freezing at-10 ℃. And after thawing, adding an amino acid modified solution, stirring at a certain temperature, fully reacting to obtain an amino acid modified cellulose solution, adding an appropriate amount of tween 80, sodium dodecyl sulfate and ferroferric oxide powder, fully stirring at 50-70 ℃, washing, filtering and drying a product by deionized water to obtain the amino acid modified cellulose composite ferroferric oxide adsorbent. The amino acid modified cellulose composite ferric oxide adsorbent for removing lead ions has the characteristics of high adsorption efficiency, low cost, reusability and environmental protection, and has wide application prospect in removing lead pollution in wastewater.
The nylon has good mechanical property, heat resistance, wear resistance and chemical stability, and related researches for preparing the adsorption material by taking the nylon as a base material are few at present, particularly for preparing the nylon adsorption material with magnetic responsiveness. The surface of the acrylic polymer is provided with a large number of carboxyl groups, and the acrylic polymer can be complexed with cations, so that the adsorption efficiency of the adsorption material is improved.
Disclosure of Invention
The invention aims to provide a magnetic response type nylon adsorbing material which is easy to separate, can be widely used for treating electroplating wastewater, dye wastewater, metal mining and smelting wastewater and the like, and has a good adsorbing effect.
The second purpose of the invention is to provide a preparation method of the magnetic response type nylon adsorbing material.
The invention adopts the technical scheme that a preparation method of a magnetic response type nylon adsorbing material is implemented according to the following steps:
firstly, 0.2-0.6 wt% of sodium carbonate aqueous solution is used for heating for 0.5-6 h at a constant temperature of 20-60 ℃, and then 0.5-1.5 mol/L of HCl is used for heating for 2-7 h at a constant temperature of 30-70 ℃ in a constant temperature water bath kettle to pre-treat the nylon base material; sequentially adding the pretreated nylon base material, 1-50 wt% of iron chloride aqueous solution, 1-80 wt% of ferrous sulfate aqueous solution and 1-60 wt% of sodium hydroxide aqueous solution into a flask, and continuously stirring and reacting at 60-130 ℃ at a rotating speed of 100-1000 rpm for 2-12 h to generate a nylon base material, wherein a mechanical stirrer and a thermometer are arranged;
step two, adding the nylon base material, the amino functional substance and water into a flask in sequence, preparing a mechanical stirrer and a thermometer, and continuously stirring and reacting at the temperature of 30-100 ℃ at the rotating speed of 100-1000 rpm for 1-8 h to prepare the amino nylon base material;
adding an acrylic monomer, tetrahydrofuran and an initiator into a flask, preparing a mechanical stirrer, a thermometer and vacuum conditions, and continuously stirring at the rotating speed of 100-1000 rpm at the temperature of 40-100 ℃ for reaction for 0.5-10 h to generate an acrylic polymer; and (3) carrying out composite reaction on the aminated nylon base material obtained in the step two and an acrylic polymer at normal temperature for 0.1-24 h to obtain the magnetic response type nylon adsorbing material.
The present invention is also characterized in that,
in the first step, the nylon is PA6, PA66, PA11, PA12, PA610 or PA 1010.
In the first step, the mass ratio of the sodium carbonate aqueous solution, HCl, the nylon base material and ferric chloride is 80-180: 300-750: 1: 5-40; the molar mass ratio of the ferrous sulfate to the ferric chloride to the sodium hydroxide is 1: 1-6: 7 to 30.
In the second step, the mass ratio of the amino functional substance to the nylon substrate material to the water is as follows: 0.5-7: 1: 10-80 parts; the amino functional substance is KH550, triethylene tetramine, ethylenediamine, amino acid, isopropylamine, aromatic amine, butanediamine, pentanediamine, putrescine, cadaverine, spermine or diaminobenzidine.
In the third step, the mass ratio of the acrylic monomer to the initiator is (5-60): 1; the initiator is benzoyl peroxide, azobisisobutyronitrile, azobisisoheptonitrile, dimethyl azobisisobutyrate, sodium persulfate or ammonium persulfate.
In the third step, the mass ratio of the acrylic monomer to the tetrahydrofuran is 1: (1-7); the acrylic monomer comprises any one or the combination of two of glycidyl methacrylate, hydroxyethyl methacrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, styrene, hydroxyethyl acrylate, hydroxypropyl acrylate, acrylic acid and the like.
In the third step, the mass ratio of the aminated nylon base material to the acrylic polymer is 1: 1 to 8.
The technical scheme adopted by the invention is that the magnetic response type nylon adsorbing material is prepared by adopting the preparation method.
The invention has the beneficial effects that:
(1) the magnetic response type nylon adsorbing material prepared by the invention has simple preparation process, the used reagents are common medicines which can be purchased from the market, the cost is low, the operability is strong, the economic benefit is achieved, and the large-scale production can be realized.
(2) The magnetic response type nylon adsorbing material prepared by the invention is easy to separate, can be widely used for the treatment of electroplating wastewater, dye wastewater, metal mining and smelting wastewater and the like, and has good adsorption effects on metal ions such as copper ions, lead ions, chromium ions and chromium ions, and pigment dyes such as methylene blue, methyl blue, basic fuchsin, rhodamine B and the like.
(3) The magnetic response type nylon adsorbing material prepared by the invention is easy to recover, and the possibility of secondary pollution to the environment is reduced.
(4) The magnetic response type nylon adsorbing material prepared by the invention is non-toxic and harmless, is environment-friendly, has good dispersibility in wastewater, and the acrylic polymer is of a multifunctional polymer structure, so that the surface of the adsorbing material is provided with a large number of carboxyl groups, and the adsorption capacity on copper ions, lead ions, chromium ions, methylene blue, methyl blue, basic fuchsin and rhodamine B is enhanced, wherein the adsorption efficiency on the copper ions can reach 88.54%, and the adsorption capacity can reach 10.97 mg/g.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
The invention provides a preparation method of a magnetic response type nylon adsorbing material, which is implemented according to the following steps:
firstly, 0.2-0.6 wt% of sodium carbonate aqueous solution is used for heating for 0.5-6 h at a constant temperature of 20-60 ℃, and then 0.5-1.5 mol/L of HCl is used for heating for 2-7 h at a constant temperature of 30-70 ℃ in a constant temperature water bath kettle to pre-treat the nylon base material; sequentially adding the pretreated nylon base material, 1-50 wt% of iron chloride aqueous solution, 1-80 wt% of ferrous sulfate aqueous solution and 1-60 wt% of sodium hydroxide aqueous solution into a flask, and continuously stirring and reacting at 60-130 ℃ at a rotating speed of 100-1000 rpm for 2-12 h to generate a nylon base material, wherein a mechanical stirrer and a thermometer are arranged;
in the first step, the nylon is PA6, PA66, PA11, PA12, PA610 or PA 1010;
in the first step, the mass ratio of the sodium carbonate aqueous solution, HCl, the nylon base material and ferric chloride is 80-180: 300-750: 1: 5-40; the molar mass ratio of the ferrous sulfate to the ferric chloride to the sodium hydroxide is 1: 1-6: 7-30;
step two, adding the nylon base material, the amino functional substance and water into a flask in sequence, preparing a mechanical stirrer and a thermometer, and continuously stirring and reacting at the temperature of 30-100 ℃ at the rotating speed of 100-1000 rpm for 1-8 h to prepare the amino nylon base material;
in the second step, the mass ratio of the amino functional substance to the nylon substrate material to the water is as follows: 0.5-7: 1: 10-80 parts; the amino functional substance is KH550, triethylene tetramine, ethylenediamine, amino acid, isopropylamine, aromatic amine, butanediamine, pentanediamine, putrescine, cadaverine, spermine or diaminobenzidine;
adding an acrylic monomer, tetrahydrofuran and an initiator into a flask, and continuously stirring and reacting at 40-100 ℃ for 0.5-10 h at the rotating speed of 100-1000 rpm under the conditions of a mechanical stirrer, a thermometer and vacuum to generate an acrylic polymer; carrying out composite reaction on the aminated nylon base material obtained in the step two and an acrylic polymer at normal temperature for 0.1-24 h to prepare a magnetic response type nylon adsorbing material;
in the third step, the mass ratio of the acrylic monomer to the initiator is 5-60: 1; the initiator is benzoyl peroxide, azobisisobutyronitrile, azobisisoheptonitrile, dimethyl azobisisobutyrate, sodium persulfate or ammonium persulfate.
In the third step, the mass ratio of the acrylic monomer to the tetrahydrofuran is 1: 1-7; the acrylic monomer comprises any one or the combination of two of glycidyl methacrylate, hydroxyethyl methacrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, styrene, hydroxyethyl acrylate, hydroxypropyl acrylate, acrylic acid and the like;
in the third step, the mass ratio of the aminated nylon base material to the acrylic polymer is 1: 1 to 8.
The invention also provides a magnetic response type nylon adsorbing material prepared by the preparation method.
The magnetic response type nylon adsorbing material is dried and ground into powder, and the powder is added into waste liquid with the pH value of 1-12 and the concentration of 1-40 mg/L at normal temperature for adsorbing for 1 min-5 h. The waste liquid is any one or combination of two or more of copper ions, lead ions, chromium ions, methylene blue, methyl blue, basic fuchsin and rhodamine B, the adsorption efficiency is 10-99%, and the unit adsorption capacity is 2-160 mg/g.
And D, testing the adsorption performance of metal ions and pigment dyes on the magnetic response type nylon adsorption material obtained in the step three, wherein the test method comprises the following steps: preparing a metal ion and pigment dye solution with the concentration of 1-40 mg/L, putting 10mL of the prepared solution into a 20mL glass bottle, adjusting the pH value to 1-12, adding 0.1-50 mg of magnetic response type nylon adsorbing material, stirring for 1-5 h, carrying out magnetic separation for 5min, taking supernate, measuring the solution concentration by using an atomic spectrophotometer, and calculating the unit adsorption amount and the removal rate.
Unit adsorption amount:
Figure BDA0003117104490000061
the removal rate is as follows:
Figure BDA0003117104490000071
wherein:
C0: initial concentration, in mg/L;
Cv: equilibrium concentration, in mg/L;
v: adsorption solution volume, unit L;
m: mass of adsorbent material, in g.
Example 1
(1) The PA6 was pretreated by first heating 50mL of 0.2 wt% aqueous sodium carbonate at 30 ℃ for 5h and then heating 220mL of 0.5mol/L HCl in a thermostatted water bath at 55 ℃ for 6 h. 0.3g of pretreated PA6, 50 mL11.12wt% of iron chloride aqueous solution, 50 mL21.6wt% of ferrous sulfate aqueous solution and 50 mL12.8wt% of sodium hydroxide aqueous solution are sequentially added into a flask (the molar mass ratio of ferrous sulfate, ferric chloride and sodium hydroxide is 1: 2: 8), a mechanical stirrer and a thermometer are arranged, and the mixture is continuously stirred and reacted at the rotating speed of 400rpm at 90 ℃ for 8 hours to generate the nylon base material.
(2) 1g of nylon base material, 2g of triethylene tetramine and 30mL of water are added into a flask, a mechanical stirrer and a thermometer are arranged, and the mixture is continuously stirred and reacted for 6 hours at the rotating speed of 300rpm at the temperature of 50 ℃ to prepare the aminated nylon base material.
(3) 2g of acrylic acid, 4g of tetrahydrofuran and 0.228g of azobisisobutyronitrile were added to a flask, and the reaction was carried out at 60 ℃ for 3 hours with continuous stirring at 400rpm, equipped with a mechanical stirrer, a thermometer and vacuum, to give polyacrylic acid. Then, 0.5g of aminated nylon base material and 1g of polyacrylic acid are reacted for 18 hours at normal temperature to prepare the magnetic response type nylon adsorbing material.
(4) And (3) carrying out copper ion adsorption performance test on the magnetic response type nylon adsorption material: preparing 20.48mg/L copper ion solution, putting 10mL into a small glass bottle, adjusting the pH value to 9, adjusting the temperature to 25 ℃, adding 18.75mg of adsorbing material, stirring for 3h, separating by a magnet for 5min, measuring the unit adsorption amount to be 10.29mg/g, and the removal rate to be 83.03%.
Example 2
(1) PA66 was pretreated by first heating 50mL of 0.4 wt% aqueous sodium carbonate at 40 ℃ for 4h and then heating 220mL of 1mol/L HCl in a thermostatted water bath at 55 ℃ for 4 h. 0.4g of pretreated PA66, 50mL of 11 wt% iron chloride aqueous solution, 50mL of 30 wt% ferrous sulfate aqueous solution and 50mL of 12.8 wt% sodium hydroxide aqueous solution are sequentially added into a flask (the molar mass ratio of the ferrous sulfate to the ferric chloride to the sodium hydroxide is 1: 3: 8), a mechanical stirrer and a thermometer are arranged, and the mixture is continuously stirred and reacted at 80 ℃ for 6 hours at the rotating speed of 500rpm to generate the nylon base material.
(2) 1g of nylon base material, 3gKH550 and 40mL of water were charged into a flask, equipped with a mechanical stirrer and a thermometer, and reacted at 70 ℃ with stirring at 500rpm for 5 hours to prepare an aminated nylon base material.
(3) 0.5g of glycidyl methacrylate, 1g of acrylic acid, 4g of tetrahydrofuran and 90mg of benzoyl peroxide were charged into a flask, and the reaction was continuously stirred at 70 ℃ for 2 hours at 600rpm with a mechanical stirrer, a thermometer and a vacuum to produce an acrylic polymer. Then, 1g of the aminated nylon base material and 1.5g of the acrylic polymer were reacted at room temperature for 12 hours to prepare a magnetic-responsive nylon adsorbent material.
(4) And (3) carrying out lead ion adsorption performance test on the magnetic response type nylon adsorption material: respectively preparing 8.33mg/L lead ion solution, cadmium ion solution and chromium ion solution, putting 10mL of the prepared solution into a small glass bottle, adjusting the pH value to 9, adjusting the temperature to 25 ℃, adding 35mg of adsorbing material, stirring for 3 hours, carrying out magnetic separation for 5 minutes, and measuring that the unit adsorption capacity of the solution to copper ions is 3.86mg/g, the removal rate is 49.67%, the unit adsorption capacity to cadmium ions is 4.23mg/g, the adsorption efficiency is 67.76%, the unit adsorption capacity to chromium ions is 3.89mg/g, and the adsorption efficiency is 52.3%.
Example 3
(1) PA11 was pretreated by first heating 50mL of 0.5 wt% aqueous sodium carbonate at 55 ℃ for 2h and then heating 220mL of 1.5mol/L HCl in a thermostatted water bath at 55 ℃ for 3 h. 0.5g of pretreated PA11, 50mL of 12 wt% iron chloride aqueous solution, 50mL of 46.3 wt% ferrous sulfate aqueous solution and 50mL of 24 wt% sodium hydroxide aqueous solution are sequentially added into a flask (the molar mass ratio of the ferrous sulfate to the ferric chloride to the sodium hydroxide is 1: 4.5: 15), a mechanical stirrer and a thermometer are arranged, and the mixture is continuously stirred and reacted at the temperature of 90 ℃ for 4 hours at the rotating speed of 900rpm to generate the nylon base material.
(2) 1g of nylon base material, 2.5g of triethylene tetramine and 40mL of water are added into a flask, a mechanical stirrer and a thermometer are arranged, and the mixture is continuously stirred and reacted for 2 hours at 90 ℃ at the rotating speed of 800rpm to prepare the aminated nylon base material.
(3) 0.68g of glycidyl methacrylate, 1g of ethyl methacrylate, 4g of tetrahydrofuran and 0.228g of azobisisobutyronitrile were put into a flask, and the mixture was continuously stirred and reacted at 80 ℃ for 1 hour at 900rpm with a mechanical stirrer, a thermometer and a vacuum to give an acrylic polymer. Then, 1g of the aminated nylon base material and 3g of the acrylic polymer are reacted for 3 hours at normal temperature to prepare the magnetic response type nylon adsorbing material.
(4) Carrying out rhodamine B adsorption performance test on the magnetic response type nylon adsorption material: preparing 15mg/L rhodamine B solution, putting 10mL into a small glass bottle, adjusting the pH value to 9, adjusting the temperature to 25 ℃, adding 20mg of adsorbing material, stirring for 3 hours, separating by using a magnet for 5min, and measuring the unit adsorption amount of 152.88mg/g and the removal rate of 84.93%.
Example 4
(1) PA12 was pretreated by first heating 50mL of 0.3 wt% aqueous sodium carbonate at 60 ℃ for 3h, then 220mL of 1.5mol/L HCl in a thermostatted water bath at 55 ℃ for 5 h. 0.4g of pretreated PA12, 50mL of 12 wt% iron chloride aqueous solution, 50mL of 50 wt% ferrous sulfate aqueous solution and 50mL of 36 wt% sodium hydroxide aqueous solution are sequentially added into a flask (the molar mass ratio of the ferrous sulfate to the ferric chloride to the sodium hydroxide is 1: 4.5: 22.5), a mechanical stirrer and a thermometer are arranged, and the mixture is continuously stirred and reacted at the rotating speed of 900rpm for 3 hours at the temperature of 100 ℃ to generate the nylon base material.
(2) 1g of nylon base material, 3g of ethylenediamine and 40mL of water were charged into a flask, equipped with a mechanical stirrer and a thermometer, and reacted at 70 ℃ with continuous stirring at 800rpm for 3 hours to prepare an aminated nylon base material.
(3) 0.62g of glycidyl methacrylate, 0.7g of acrylic acid, 4g of tetrahydrofuran and 0.228g of azobisisobutyronitrile were charged into a flask, and the reaction was continuously stirred at 90 ℃ and 900rpm for 1 hour under vacuum with a mechanical stirrer, a thermometer to give an acrylic polymer. Then, 1g of the aminated nylon base material and 2.5g of the acrylic polymer were reacted at room temperature for 5 hours to prepare a magnetic-responsive nylon adsorbent material.
(4) Carrying out methylene blue adsorption performance test on the magnetic response type nylon adsorption material: preparing 10mg/L methylene blue solution, putting 10mL into a small glass bottle, adjusting the pH value to 9 and the temperature to 25 ℃, adding 30mg of adsorbing material, stirring for 3h, separating by a magnet for 5min, and measuring the unit adsorption amount of 96.33mg/g and the removal rate of 80.28%.
Example 5
(1) PA12 was pretreated by first heating 50mL of 0.3 wt% aqueous sodium carbonate at 60 ℃ for 3h, then 220mL of 1.5mol/L HCl in a thermostatted water bath at 55 ℃ for 5 h. 0.4g of pretreated PA610, 50mL of 12 wt% iron chloride aqueous solution, 50mL of 50 wt% ferrous sulfate aqueous solution and 50mL of 36 wt% sodium hydroxide aqueous solution are sequentially added into a flask (the molar mass ratio of the ferrous sulfate to the ferric chloride to the sodium hydroxide is 1: 4.5: 22.5), a mechanical stirrer and a thermometer are arranged, and the mixture is continuously stirred and reacted at the rotating speed of 900rpm for 4 hours at the temperature of 100 ℃ to generate the nylon base material.
(2) 1g of nylon base material, 3g of isopropylamine and 40mL of water were charged into a flask, equipped with a mechanical stirrer and a thermometer, and reacted at 80 ℃ with continuous stirring at 800rpm for 3 hours to prepare an aminated nylon base material.
(3) 0.62g of glycidyl methacrylate, 0.7g of acrylic acid, 4g of tetrahydrofuran and 0.228g of azobisisobutyronitrile were charged into a flask, and the reaction was continuously stirred at 90 ℃ and 900rpm for 1 hour under vacuum with a mechanical stirrer, a thermometer to give an acrylic polymer. Then, 1g of the aminated nylon base material and 2.5g of the acrylic polymer were reacted at room temperature for 5 hours to prepare a magnetic-responsive nylon adsorbent material.
(4) And (3) carrying out a basic fuchsin adsorption performance test on the magnetic response type nylon adsorption material: preparing 10mg/L basic fuchsin solution, putting 10mL into a small glass bottle, adjusting the pH value to 9 and the temperature to 25 ℃, adding 30mg of adsorbing material, stirring for 3h, separating by a magnet for 5min, measuring the unit adsorption capacity of 96.35mg/g, and the removal rate is 80.27%.

Claims (8)

1. A preparation method of a magnetic response type nylon adsorbing material is characterized by comprising the following steps:
firstly, 0.2-0.6 wt% of sodium carbonate aqueous solution is used for heating for 0.5-6 h at a constant temperature of 20-60 ℃, and then 0.5-1.5 mol/L of HCl is used for heating for 2-7 h at a constant temperature of 30-70 ℃ in a constant temperature water bath kettle to pre-treat the nylon base material; sequentially adding the pretreated nylon base material, 1-50 wt% of iron chloride aqueous solution, 1-80 wt% of ferrous sulfate aqueous solution and 1-60 wt% of sodium hydroxide aqueous solution into a flask, and continuously stirring and reacting at 60-130 ℃ at a rotating speed of 100-1000 rpm for 2-12 h to generate a nylon base material, wherein a mechanical stirrer and a thermometer are arranged;
step two, adding the nylon base material, the amino functional substance and water into a flask in sequence, preparing a mechanical stirrer and a thermometer, and continuously stirring and reacting at the temperature of 30-100 ℃ at the rotating speed of 100-1000 rpm for 1-8 h to prepare the amino nylon base material;
adding an acrylic monomer, tetrahydrofuran and an initiator into a flask, preparing a mechanical stirrer, a thermometer and vacuum conditions, and continuously stirring at the rotating speed of 100-1000 rpm at the temperature of 40-100 ℃ for reaction for 0.5-10 h to generate an acrylic polymer; and (3) carrying out composite reaction on the aminated nylon base material obtained in the step two and an acrylic polymer at normal temperature for 0.1-24 h to obtain the magnetic response type nylon adsorbing material.
2. The method for preparing a magnetic-response nylon adsorbent material according to claim 1, wherein in the first step, the nylon is PA6, PA66, PA11, PA12, PA610 or PA 1010.
3. The preparation method of the magnetic response type nylon adsorbing material as claimed in claim 1, wherein in the first step, the mass ratio of the sodium carbonate aqueous solution, the HCl, the nylon base material and the ferric chloride is 80-180: 300-750: 1: 5-40; the molar mass ratio of the ferrous sulfate to the ferric chloride to the sodium hydroxide is 1: 1-6: 7 to 30.
4. The preparation method of the magnetic response type nylon adsorbing material according to claim 1, wherein in the second step, the mass ratio of the amino functional substance to the nylon base material to the water is as follows: 0.5-7: 1: 10-80 parts; the amino functional substance is KH550, triethylene tetramine, ethylenediamine, amino acid, isopropylamine, aromatic amine, butanediamine, pentanediamine, putrescine, cadaverine, spermine or diaminobenzidine.
5. The preparation method of the magnetic response type nylon adsorbing material as claimed in claim 1, wherein in the third step, the mass ratio of the acrylic monomer to the initiator is 5-60: 1; the initiator is benzoyl peroxide, azobisisobutyronitrile, azobisisoheptonitrile, dimethyl azobisisobutyrate, sodium persulfate or ammonium persulfate.
6. The preparation method of the magnetic-response nylon adsorbing material according to claim 1, wherein in the third step, the mass ratio of the acrylic monomer to the tetrahydrofuran is 1: 1-7; the acrylic monomer comprises any one or the combination of two of glycidyl methacrylate, hydroxyethyl methacrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, styrene, hydroxyethyl acrylate, hydroxypropyl acrylate or acrylic acid.
7. The method for preparing a magnetic-response nylon adsorbing material according to claim 1, wherein in the third step, the mass ratio of the aminated nylon base material to the acrylic acid polymer is 1: 1 to 8.
8. A magnetic response type nylon adsorbing material, which is prepared by the preparation method according to any one of claims 1 to 7.
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