CN112961283B - Environment-friendly degradable super absorbent resin and preparation method thereof - Google Patents
Environment-friendly degradable super absorbent resin and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F251/00—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
- C08F251/02—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof on to cellulose or derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F251/00—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F289/00—Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds not provided for in groups C08F251/00 - C08F287/00
Abstract
A preparation method of environment-friendly degradable super absorbent resin comprises the following steps: after a system containing humic acid, sodium carboxymethylcellulose, N- (2-hydroxyethyl) ethylenediamine, acrylic acid and xanthan gum fully reacts, 30% hydrogen peroxide and manganese dioxide are added to be rapidly stirred and foamed, and after foaming is completed, a product is dried and crushed to obtain the environment-friendly degradable super absorbent resin. The product has the water absorption multiplying power of 2187g/g and the saline absorption multiplying power of 285g/g; scanning Electron Microscope (SEM) results show that a three-dimensional cross-linked network structure with xanthan gum as a framework and uniform and regular is formed inside molecules of the xanthan gum; soil burying experiments prove that the product can be completely degraded in soil. The invention successfully prepares the super absorbent resin which is biodegradable, green, environment-friendly, high in water absorption and salt resistance, low in cost and excellent in performance, and can reduce the pollution to the environment when being applied to agriculture and forestry.
Description
Technical Field
The invention relates to the technical field of water absorption and water retention, in particular to a preparation method of an environment-friendly degradable super absorbent resin.
Background
The super absorbent resin is a functional polymer material with a space network structure, is insoluble in water, but swells to form high-water-content gel after absorbing a large amount of water, can absorb water hundreds of times or even thousands of times, and has excellent water absorption and retention performance. Is widely applied to the fields of agriculture, forestry, gardening, medical treatment, health care, daily chemicals and the like. At present, the common super absorbent resins are: starch-based, cellulose-based, synthetic polymer-based, protein-based, other natural products and derivatives thereof, blends and composites thereof, and the like. Although the super absorbent resin has been studied for a long time, few products which can be really applied to the production and living fields of people still exist; the raw material development is single, and the existing resources of nature are not widely applied; the production cost is high, and the salt resistance of the product is to be improved; poor degradation performance, serious environmental pollution and the like.
The invention takes biodegradable and environment-friendly xanthan gum, humic acid and the like as main raw materials, takes acrylic acid as a hydrophilic agent and nitrogen (2-hydroxyethyl) ethylenediamine as a coordination agent, and synthesizes the environment-friendly degradable super absorbent resin with excellent water absorption and salt resistance through a free radical aqueous solution copolymerization method and a foaming technology. The product can be used in the fields of agriculture, forestry, gardening and the like, and solves the problems of high cost, low water and salt water absorption rate, poor degradation performance, serious environmental pollution and the like of the existing product.
Disclosure of Invention
The invention aims to provide a preparation method of an environment-friendly degradable super absorbent resin, which adopts a free radical aqueous solution copolymerization method and a foaming technology to synthesize the environment-friendly degradable super absorbent resin with excellent water absorption and salt resistance. The method takes biodegradable and environment-friendly Xanthan Gum (XG), humic Acid (HA) and sodium carboxymethylcellulose as base materials, so that the environmental protection and the degradability of the product are improved; acrylic Acid (AA) with high content of hydrophilic group (-COOH) is taken as a hydrophilic agent, so that the water absorption performance of the product is improved; meanwhile, N- (2 hydroxyethyl) ethylenediamine with strong coordination capacity with metal ions is introduced as a coordination agent, the osmotic pressure of the product during water absorption is increased through the coordination effect of the N- (2 hydroxyethyl) ethylenediamine and the metal ions, the water absorption and salt resistance of the product is improved, and a foaming method is adopted to generate a large amount of sponge cell structures in the product, so that a plurality of cells capable of storing water are increased on the basis of a three-dimensional network structure of the whole product, and the water absorption performance of the product is further improved. The product can be used in the fields of agriculture, forestry, gardening and the like, and solves the problems of high cost, low water and salt water absorption rate, poor degradation performance, serious environmental pollution and the like of the existing product.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a preparation method of an environment-friendly degradable super absorbent resin comprises the following steps:
step 1, completely dissolving humic acid, sodium carboxymethylcellulose and N- (2-hydroxyethyl) ethylenediamine in water, adding acrylic acid neutralized by NaOH, and uniformly mixing to obtain a mixed monomer solution, namely a system 1;
step 2, mixing potassium persulfate (KPS) and distilled water according to a mass ratio of 1 (30 to 50) to prepare an initiator solution with a certain concentration, namely a system 2;
step 3, mixing the xanthan gum and the distilled water according to the mass ratio of 1 (30 to 60), adding the mixture into a three-neck flask provided with an electric stirrer and a condensation reflux pipe, heating and stirring the mixture to 50 to 90 ℃, and gelatinizing the mixture at a high temperature for 0.2 to 1 hour to obtain a system 3;
step 4, slowly dripping the system 1 and the system 2 into the system 3, stirring at a constant temperature of 300-800 rpm for 3-6 hours after finishing dripping for about 1.5 hours, and cooling to room temperature to obtain a system 4;
and 5, respectively adding 30% of hydrogen peroxide and manganese dioxide in a mass ratio of 10:0.2 into the system 4, stirring at a high speed of 2000-5000 rpm for 15-50 s, quickly pouring the product into a beaker, and immediately drying and crushing in a drying oven at 100 ℃ after the product is completely foamed to obtain the environment-friendly degradable super absorbent resin.
Preferably, the method used in the present invention is a free radical aqueous solution copolymerization method.
Preferably, in the invention, the mass ratio of humic acid, sodium carboxymethylcellulose, N- (2-hydroxyethyl) ethylenediamine, acrylic acid, potassium persulfate, xanthan gum and manganese dioxide is 1: (0.1-0.5): (1.0-2.0): (3.0-8.0): (0.1-0.3): (1.0-2.0): (0.2-0.5).
Preferably, in the step 1, the acrylic acid is neutralized with NaOH, and the degree of neutralization is 100%.
Preferably, in the step 2, the mass ratio of potassium persulfate (KPS) to distilled water is 1 (30 to 50).
Preferably, in the step 3, the mass ratio of the xanthan gum to the distilled water is 1 (30 to 60).
Preferably, in the step 3, the reaction temperature is 50-90 ℃ and the reaction time is 0.2-1 h.
Preferably, in the step 4, the dropping time is 1.5h, the stirring speed is 300-800 rpm, and the reaction time is 3-6 h.
Preferably, in the step 5, the mass ratio of the 30% hydrogen peroxide to the manganese dioxide is 10:0.2, the stirring speed is 2000-5000 rpm, the stirring time is 15-50 s, and the drying temperature is 100 ℃.
Compared with the prior art, the invention has the following beneficial technical effects:
compared with the prior art, in the preparation process of the environment-friendly degradable super absorbent resin, hydroxyl groups on substrates such as humic acid, xanthan gum, sodium carboxymethyl cellulose and the like are initiated by utilizing free radicals generated by an initiator potassium persulfate to generate oxygen radicals, and then acrylic acid and N- (2 hydroxyethyl) ethylenediamine are initiated by the oxygen radicals to graft and copolymerize the hydroxyl groups and the ethylene diamine, so that hydrophilic groups and coordination groups are grafted on the substrates, the osmotic pressure of the product during water absorption is increased, the water absorption and salt resistance of the product is improved, and meanwhile, a large amount of sponge porous structures are generated in the product by adopting a foaming method, so that a plurality of water-storing pores are increased on the basis of a three-dimensional network structure of the whole product, and the water absorption performance of the product is further improved. The product has the water absorption multiplying power of 2187g/g and the saline absorption multiplying power of 285g/g; scanning Electron Microscope (SEM) results show that a three-dimensional cross-linked network structure with xanthan gum as a framework and uniform and regular is formed inside molecules of the xanthan gum; the soil burying experiment proves that the product can be completely degraded in soil.
Detailed Description
The present invention will be further described with reference to the following embodiments.
Example one
Step 1, completely dissolving 2.00g of humic acid, 0.20g of sodium carboxymethylcellulose and 2.00g of N- (2-hydroxyethyl) ethylenediamine in water, adding 6.00g of acrylic acid neutralized by NaOH, and uniformly mixing to obtain a mixed monomer solution, namely a system 1;
step 2, mixing 0.20g of potassium persulfate (KPS) and 6ml of distilled water to prepare an initiator solution with a certain concentration, namely a system 2;
step 3, mixing 2.00g of xanthan gum and 60ml of distilled water, adding the mixture into a three-neck flask provided with an electric stirrer and a condensation reflux pipe, heating to 50 ℃ under stirring, and gelatinizing at high temperature for 0.2 h to obtain a system 3;
step 4, slowly dripping the system 1 and the system 2 into the system 3 for about 1.5 hours, stirring at a constant temperature of 300rpm for reaction for 3 hours, and cooling to room temperature to obtain a system 4;
and 5, respectively adding 20ml of 30% hydrogen peroxide and 0.40g of manganese dioxide into the system 4, stirring at a high speed of 3000rpm for 20s, quickly pouring the product into a beaker, and after the product is completely foamed, immediately drying and crushing the product in a drying oven at 100 ℃ to obtain the environment-friendly degradable super absorbent resin.
Example two
Step 1, completely dissolving 2.00g of humic acid, 0.50g of sodium carboxymethylcellulose and 4.00g of N- (2-hydroxyethyl) ethylenediamine in water, adding 16.00g of acrylic acid neutralized by NaOH, and uniformly mixing to obtain a mixed monomer solution, namely a system 1;
step 2, mixing 0.60g of potassium persulfate (KPS) and 10ml of distilled water to prepare an initiator solution with a certain concentration, namely a system 2;
step 3, mixing 4.00 of xanthan gum and 24ml of distilled water, adding the mixture into a three-neck flask provided with an electric stirrer and a condensation reflux pipe, heating to 90 ℃ under stirring, and gelatinizing at high temperature for 1 h to obtain a system 3;
step 4, slowly dripping the system 1 and the system 2 into the system 3 for about 1.5 hours, stirring at a constant temperature of 800rpm for reaction for 6 hours, and cooling to room temperature to obtain a system 4;
and 5, respectively adding 20ml of 30% hydrogen peroxide and 1.00g of manganese dioxide into the system 4, stirring at a high speed of 5000rpm for 50s, quickly pouring the product into a beaker, and after the product is completely foamed, immediately drying and crushing the product in a drying oven at 100 ℃ to obtain the environment-friendly degradable super absorbent resin.
EXAMPLE III
Step 1, completely dissolving 2.00g of humic acid, 0.60g of sodium carboxymethylcellulose and 3.00g of N- (2-hydroxyethyl) ethylenediamine in water, adding 10ml of acrylic acid neutralized by NaOH, and uniformly mixing to obtain a mixed monomer solution, namely a system 1;
step 2, mixing 0.40g of potassium persulfate (KPS) and 12ml of distilled water to prepare an initiator solution with a certain concentration, namely a system 2;
step 3, mixing 3.00g of xanthan gum and 120ml of distilled water, adding the mixture into a three-neck flask provided with an electric stirrer and a condensation reflux pipe, heating to 50-90 ℃ under stirring, and gelatinizing at high temperature for 0.6 h to obtain a system 3;
step 4, slowly dripping the system 1 and the system 2 into the system 3 for about 1.5 hours, stirring at a constant temperature of 500rpm for reaction for 5 hours, and cooling to room temperature to obtain a system 4;
and 5, respectively adding 8ml of 30% hydrogen peroxide and 0.8g of manganese dioxide into the system 4, stirring at a high speed of 4000rpm for 15s, quickly pouring the product into a beaker, and after the product is completely foamed, immediately drying and crushing the product in an oven at 100 ℃ to obtain the environment-friendly degradable super absorbent resin.
Example four
Step 1, completely dissolving 2.00g of humic acid, 0.40g of sodium carboxymethylcellulose and 2.50g of N- (2-hydroxyethyl) ethylenediamine in water, adding acrylic acid neutralized by NaOH, and uniformly mixing to obtain a mixed monomer solution, namely a system 1;
step 2, mixing 0.3g of potassium persulfate (KPS) and 9ml of distilled water to prepare an initiator solution with a certain concentration, namely a system 2;
step 3, mixing 3.50g of xanthan gum and 150ml of distilled water, adding the mixture into a three-neck flask provided with an electric stirrer and a condensation reflux pipe, heating and stirring the mixture to 70 ℃, and gelatinizing the mixture at a high temperature for 0.7h to obtain a system 3;
step 4, slowly dropping the system 1 and the system 2 into the system 3, after dropping for about 1.5h, stirring at a constant temperature of 600rpm for reaction for 3.5 h, and cooling to room temperature to obtain a system 4;
and 5, respectively adding 6ml of 30% hydrogen peroxide and 0.6g of manganese dioxide into the system 4, stirring at a high speed of 3000rpm for 30s, quickly pouring the product into a beaker, and after the product is completely foamed, immediately drying and crushing the product in a drying oven at 100 ℃ to obtain the environment-friendly degradable super absorbent resin.
Example five
Step 1, completely dissolving 2.00g of humic acid, 0.7g of sodium carboxymethylcellulose and 3.50g of N- (2-hydroxyethyl) ethylenediamine in water, adding 10ml of acrylic acid neutralized by NaOH, and uniformly mixing to obtain a mixed monomer solution, namely a system 1;
step 2, mixing 0.34g of potassium persulfate (KPS) and 14ml of distilled water to prepare an initiator solution with a certain concentration, namely a system 2;
step 3, mixing 2.80g of xanthan gum and 9ml of distilled water, adding the mixture into a three-neck flask provided with an electric stirrer and a condensation reflux pipe, heating and stirring the mixture to 70 ℃, and gelatinizing the mixture at a high temperature for 0.9 h to obtain a system 3;
step 4, slowly dripping the system 1 and the system 2 into the system 3, stirring at a constant temperature of 550rpm for 5.5 hours after finishing dripping for about 1.5 hours, and cooling to room temperature to obtain a system 4;
and 5, respectively adding 30% of hydrogen peroxide and manganese dioxide in a mass ratio of 10:0.2 into the system 4, stirring at a high speed of 4500rpm for 25s, quickly pouring the product into a beaker, and immediately drying and crushing in a 100 ℃ drying oven after the product is completely foamed to obtain the environment-friendly degradable super absorbent resin.
Example six
Step 1, completely dissolving 2.00g of humic acid, 0.4g of sodium carboxymethylcellulose and 2.00g of N- (2-hydroxyethyl) ethylenediamine in water, adding 10g of acrylic acid neutralized by NaOH, and uniformly mixing to obtain a mixed monomer solution, namely a system 1;
step 2, mixing 0.30g of potassium persulfate (KPS) and 9ml of distilled water according to a mass ratio of 1 (30 to 50) to prepare an initiator solution with a certain concentration, namely a system 2;
step 3, mixing 2.80g of xanthan gum and 12ml of distilled water, adding the mixture into a three-neck flask provided with an electric stirrer and a condensation reflux pipe, heating and stirring the mixture to 75 ℃, and gelatinizing the mixture at a high temperature for 0.6 h to obtain a system 3;
step 4, slowly dripping the system 1 and the system 2 into the system 3 for about 1.5 hours, stirring at a constant temperature of 350rpm for reaction for 4.5 hours, and cooling to room temperature to obtain a system 4;
and 5, respectively adding 30% of hydrogen peroxide and manganese dioxide in a mass ratio of 10:0.2 into the system 4, stirring at a high speed of 2500rpm for 45s, quickly pouring the product into a beaker, and immediately drying and crushing in a 100 ℃ oven after the product is completely foamed to obtain the environment-friendly degradable super absorbent resin.
The water absorption multiplying power of the product is 2187g/g, and the saline absorption multiplying power is 285g/g; scanning Electron Microscope (SEM) results show that a three-dimensional cross-linked network structure with xanthan gum as a framework and uniform and regular is formed inside molecules of the xanthan gum; the soil burying experiment proves that the product can be completely degraded in soil.
Comparative example 1
Referring to the sixth embodiment, the present embodiment is different from the sixth embodiment in that step 5, i.e., the foaming step, is omitted. The rest process is completely the same as the sixth embodiment.
Comparative example 1 omits step 5, namely, the foaming process is omitted, and as a result, the water absorption capacity of the prepared environment-friendly degradable super absorbent resin is found to be 1056g/g, the saline absorption capacity is found to be 122g/g, and the water absorption performance is obviously lower than that of the sixth example. The reason is analyzed: in the fifth step, the added hydrogen peroxide is decomposed under the catalysis of manganese dioxide to release oxygen, bubbles are generated in the system when the oxygen overflows, a sponge cellular structure capable of storing water is generated in the product, so that the water absorption and salt absorption rate of the product is greatly improved, and if the step 5 is omitted, the obtained product loses the cellular structure in the sixth embodiment, so that the water absorption and salt absorption rate is reduced, and the application effect is not as good as that of the sixth embodiment.
Comparative example No. two
Referring to example six, the difference between this example and example six is that the sodium carboxymethylcellulose raw material is omitted in step 1. The rest of the process is completely the same as the sixth embodiment.
As a result of omitting the raw material of sodium carboxymethylcellulose from step 1 in comparative example 2, it was found that the water absorption capacity of the prepared environmentally friendly degradable super absorbent resin was 1394g/g, the saline absorption capacity was 142g/g, and the water absorption performance was significantly lower than that of example six. The reason is analyzed as follows: firstly, because the sodium carboxymethyl cellulose contains a large amount of hydrophilic carboxyl, the introduction of the sodium carboxymethyl cellulose can increase the water absorption and saline water absorption rate of the product; and secondly, the sodium carboxymethyl cellulose has strong thickening and gluing effects, the addition of the sodium carboxymethyl cellulose can increase the viscosity of a system, and in the subsequent step 5, the sodium carboxymethyl cellulose plays roles in supporting and protecting bubbles, so that the bubble structure in a product is compact and uniform.
Comparative example No. three
Referring to the sixth embodiment, the difference between this embodiment and the sixth embodiment is that in step 1, N- (2 hydroxyethyl) ethylenediamine is replaced with equal amounts of other reagents having coordinating ability, such as N- (2 hydroxymethyl) ethylenediamine, N- (2 hydroxypropyl) ethylenediamine, acrylamide, and the like. The rest raw materials and processes are completely the same as the sixth embodiment.
In comparative example 3, other types of complexing agents are adopted, and the comparison shows that the water absorption and retention effects of the synthesized environment-friendly degradable super absorbent resin are not as good as those of the sixth example.
Comparative example No. four
Referring to example six, this example differs from example six in that in step 1, the N- (2 hydroxyethyl) ethylenediamine starting material is omitted. The rest raw materials and processes are completely the same as the sixth embodiment.
Comparative example 4 in step 1, the N- (2 hydroxyethyl) ethylenediamine raw material is omitted, and as a result, the water absorption capacity of the prepared environment-friendly degradable super absorbent resin is 1098g/g, the saline absorption capacity is 184g/g, and the water absorption capacity and the saline absorption capacity can be obviously smaller than those of the sixth example. The reason is analyzed: firstly, due to the good size effect between the N- (2 hydroxyethyl) ethylenediamine and the xanthan gum, when the N- (2 hydroxyethyl) ethylenediamine is grafted on a molecular chain of the xanthan gum, a large amount of micro-gaps for storing water are formed by the steric hindrance effect of the N- (2 hydroxyethyl) ethylenediamine on a branched chain when the molecular chain of the xanthan gum is curled and wound, so that the water absorption performance of a product is improved; secondly, the nitrogen (2-ethoxyl) ethylenediamine contains two hydrophilic groups-NH in the molecule 2 And the two radicals are-NH 2 The two phases are separated by 2 carbon atoms and can form a chelate of a stable five-membered ring structure with cations in a solution, so that the concentration of the cations in a resin network is increased, the osmotic pressure difference between the inside and the outside of the resin network is increased, and the water absorption of the resin is improvedAnd saline absorption rate.
According to comparative example 4, summarized in connection with comparative example 3: if the N- (2 hydroxyethyl) ethylenediamine raw material with synergistic action with xanthan gum is not used or other types of coordination agent raw materials are used instead, the water absorption and salt resistance of the prepared xanthan gum super absorbent resin can not achieve the effect achieved by the invention.
The result shows that the water absorption capacity of the environment-friendly degradable super absorbent resin synthesized under the optimal conditions obtained in the sixth embodiment is 2187g/g, and the saline water absorption capacity is 285g/g; scanning Electron Microscopy (SEM) results show: a three-dimensional cross-linked network structure with xanthan gum as a framework and uniform and regular is formed inside the product; soil burying experiments prove that the product can be degraded in soil, and can reduce the pollution to the environment when being applied to agriculture and forestry.
Claims (9)
1. The preparation method of the environment-friendly degradable super absorbent resin is characterized by comprising the following steps:
carrying out free radical aqueous solution copolymerization on a system containing humic acid, sodium carboxymethyl cellulose, N- (2 hydroxyethyl) ethylenediamine, acrylic acid and xanthan gum; adding hydrogen peroxide and manganese dioxide, stirring and foaming rapidly, and drying and crushing the product after foaming completely to obtain the environment-friendly degradable super absorbent resin.
2. The method according to claim 1, wherein the mass ratio of humic acid, sodium carboxymethylcellulose, N- (2-hydroxyethyl) ethylenediamine, acrylic acid and xanthan gum is 1: (0.1-0.5): (1.0-2.0): (3.0-8.0): (1.0-2.0).
3. The method of claim 1, wherein the aqueous radical copolymerization comprises the steps of:
dissolving humic acid, sodium carboxymethylcellulose and N- (2-hydroxyethyl) ethylenediamine in water, adding acrylic acid neutralized by NaOH, and uniformly mixing to obtain a mixed monomer solution;
adding water into the xanthan gum, heating to 50-90 ℃, and gelatinizing at high temperature for 0.2-1 h;
slowly dripping the mixed monomer solution and the initiator solution into the high-temperature gelatinized xanthan gum, and stirring and reacting for 3-6 h at constant temperature after finishing dripping.
4. The method of claim 3, wherein the initiator is potassium persulfate, and the mass ratio of humic acid to potassium persulfate is 1: (0.1-0.3).
5. The method according to claim 3, wherein the mixed monomer solution and the initiator solution are slowly dripped into the high-temperature gelatinized xanthan gum for 1.5h, the stirring speed is 300-800 rpm, and the reaction time is 3-6 h.
6. The method of claim 1, wherein the foaming is performed by using 30% hydrogen peroxide, and the mass ratio of the 30% hydrogen peroxide to the manganese dioxide is 10:0.2, the stirring speed is 3000rpm, the stirring time is 30s, and the drying temperature is 100 ℃.
7. The method of claim 1, comprising the steps of:
step 1, completely dissolving humic acid, sodium carboxymethylcellulose and N- (2-hydroxyethyl) ethylenediamine in water, adding acrylic acid neutralized by NaOH, and uniformly mixing to obtain a mixed monomer solution, namely a system 1;
step 2, mixing potassium persulfate and distilled water according to a mass ratio of 1 (30 to 50) to prepare an initiator solution with a certain concentration, namely a system 2;
step 3, mixing the xanthan gum and the distilled water according to the mass ratio of 1 (30 to 60), adding the mixture into a three-neck flask provided with an electric stirrer and a condensation reflux pipe, heating and stirring the mixture to 50 to 90 ℃, and gelatinizing the mixture at a high temperature for 0.2 to 1 hour to obtain a system 3;
step 4, slowly dripping the system 1 and the system 2 into the system 3, stirring at a constant temperature of 300-800 rpm for 3-6 hours after dripping for 1.5 hours, and cooling to room temperature to obtain a system 4;
and 5, respectively adding 30% of hydrogen peroxide and manganese dioxide in a mass ratio of 10:0.2 into the system 4, stirring at a high speed of 2000-5000 rpm for 15-50 s, quickly pouring the product into a beaker, and immediately drying and crushing in a 100 ℃ drying oven after the product is completely foamed to obtain the environment-friendly degradable super absorbent resin.
8. The method of claim 7, wherein the mass ratio of humic acid, sodium carboxymethylcellulose, N- (2 hydroxyethyl) ethylenediamine, acrylic acid, potassium persulfate, xanthan gum, manganese dioxide is 1: (0.1-0.5): (1.0-2.0): (3.0-8.0): (0.1-0.3): (1.0-2.0): (0.2 to 0.5);
the acrylic acid is neutralized by NaOH, and the neutralization degree is 100 percent;
the mass ratio of the potassium persulfate to the distilled water is 1: (30 to 50);
the mass ratio of the xanthan gum to the distilled water is 1: (30 to 60).
9. The environmentally-friendly degradable super absorbent resin prepared by the method of any one of claims 1 to 8.
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| JP2014136797A (en) * | 2013-01-18 | 2014-07-28 | Uni Charm Corp | Water retention assistant, and absorbent material, absorber, and absorptive article containing the assistant |
| CN108034023A (en) * | 2017-12-25 | 2018-05-15 | 宜兴丹森科技有限公司 | The preparation method of xanthans graft polymerization acrylic acid high hydroscopic resin |
| CN111468074A (en) * | 2020-04-13 | 2020-07-31 | 咸阳职业技术学院 | Acrylamide and aluminum complex/hydroxypropyl β -cyclodextrin microsphere and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014136797A (en) * | 2013-01-18 | 2014-07-28 | Uni Charm Corp | Water retention assistant, and absorbent material, absorber, and absorptive article containing the assistant |
| CN108034023A (en) * | 2017-12-25 | 2018-05-15 | 宜兴丹森科技有限公司 | The preparation method of xanthans graft polymerization acrylic acid high hydroscopic resin |
| CN111468074A (en) * | 2020-04-13 | 2020-07-31 | 咸阳职业技术学院 | Acrylamide and aluminum complex/hydroxypropyl β -cyclodextrin microsphere and preparation method thereof |
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