CN114149650A - Salt-resistant antibacterial super absorbent resin and preparation method thereof - Google Patents
Salt-resistant antibacterial super absorbent resin and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a salt-resistant antibacterial super absorbent resin which is prepared from the following raw materials in parts by weight: 25-38 parts of unsaturated sulfonic acid small monomer, 11-17 parts of nano titanium dioxide, 9-13 parts of nano silicon dioxide, 11-19 parts of composite fiber, 3-8 parts of composite nano antibacterial agent, 7-11 parts of composite cross-linking agent, 9-17 parts of N, N' -methylene bisacrylamide, 3-7 parts of high-substitution-degree cross-linked carboxymethyl cellulose and 1-5 parts of antioxidant; the composite fiber is prepared from carboxymethyl chitosan, poor saponin, montmorillonite, sepiolite and diatomite. The invention overcomes the defects of the prior art, has reasonable design, safety, reliability, no toxicity, no pollution, better salt resistance and antibacterial property, strong water absorption, higher social use value and application prospect.
Description
Technical Field
The invention relates to the technical field of resin, in particular to salt-resistant antibacterial super absorbent resin and a preparation method thereof.
Background
Super Absorbent resin (SAP) is a special functional polymer material with certain crosslinking degree and water insolubility, which is a polymer with three-dimensional network structure after proper crosslinking, and contains many strong hydrophilic groups such as carboxyl, hydroxyl, sulfonic group, acyl and the like and a unique three-dimensional network structure, and can absorb water which is dozens of times or even thousands of times of the weight of the SAP in a short time through the water absorption expansion of the network structure, and the absorbed water can not be dehydrated even under higher pressure, thereby having important function in many fields. Although the super absorbent resin material has short development time, the super absorbent resin has excellent performance, and is applied to various fields, such as medical and health aspects, physiological and sanitary articles for women and babies, drug slow release materials, artificial organs and the like, daily chemical engineering aspects, beauty cosmetics, aromatic adsorption materials, moisturizing emulsions and the like, industrial and building industries as oil-water separating agents, deodorizing agents, drying agents, water and water blocking and preventing of cables and tunnel buildings and the like, and agricultural application as soil improvement, desert greening, soilless culture media, drought resisting and water retaining, pesticide and fertilizer slow release, food and fruit preservation materials and the like. The super absorbent resin has excellent performance and wide application, and becomes an indispensable material in various fields, particularly agriculture, forestry, medical treatment and health care. The emergence of the super absorbent resin also makes the desert possible to become oasis.
Since the first super absorbent resin reported in 1966, the super absorbent resin has developed rapidly, and many varieties have been introduced. According to the difference of synthetic raw materials, natural and modified high molecular (including starch series, cellulose and other natural products series) and artificial synthetic super absorbent resin are generally divided. The starch-series and fiber-series super absorbent resins have the defects of easy mildew and complex process of products and the like, so the application range is limited. In contrast, synthetic super absorbent resin has simple synthetic process, high production efficiency, low production cost and good water absorption performance, and becomes a main object for studying super absorbent resin by students. However, the application field of the super absorbent resin is continuously expanded, and the requirement of the super absorbent resin is higher and higher. With the increasing use amount of super absorbent resin and the increasing environmental awareness of people, the super absorbent resin is required to have better antibacterial and salt resistance. It is reported that the super absorbent resin used as health care and cosmetics in the world accounts for more than 80% of the total production amount, and the water absorbent resin should have good bacteriostatic property and salt resistance.
Therefore, the inventor provides a salt-resistant antibacterial super absorbent resin and a preparation method thereof in order to achieve the purpose of higher practical value, with the experience of design development and actual manufacturing which is abundant in the related industry for many years, and research and improvement are carried out aiming at the existing structure and deficiency.
Disclosure of Invention
In order to solve the problems mentioned in the background art, the invention provides a salt-resistant antibacterial super absorbent resin and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the salt-resistant antibacterial super absorbent resin is prepared from the following raw materials in parts by weight:
25-38 parts of unsaturated sulfonic acid small monomer, 11-17 parts of nano titanium dioxide, 9-13 parts of nano silicon dioxide, 11-19 parts of composite fiber, 3-8 parts of composite nano antibacterial agent, 7-11 parts of composite cross-linking agent, 9-17 parts of N, N' -methylene bisacrylamide, 3-7 parts of high-substitution-degree cross-linked carboxymethyl cellulose and 1-5 parts of antioxidant.
Preferably, the composite fiber is made of carboxymethyl chitosan, poor saponin, montmorillonite, sepiolite and diatomite.
Preferably, the unsaturated sulfonic acid small monomer is one or more of sodium allyl sulfonate, sodium styrene sulfonate, sodium vinyl sulfonate, sodium methallyl sulfonate, sodium methallyloxy sulfonate, amine allyl sulfonate, amine styrene sulfonate, amine vinyl sulfonate, potassium allyl sulfonate, potassium styrene sulfonate, potassium vinyl sulfonate, potassium methallyl sulfonate, and potassium methallyloxy sulfonate.
Preferably, the composite nano antibacterial agent is prepared from the following raw materials in parts by weight:
25-30 parts of nano silver, 18-25 parts of graphene, 8-12 parts of 2,4, 5-trihydroxybenzene butanone, 12-15 parts of gamma-polyglutamic acid, 15-20 parts of solubilizer, 15-25 parts of halloysite nanotube and 7-15 parts of 3-aminopropyltriethoxysilane.
Preferably, the composite crosslinking agent is a mixture of ethylene glycol diglycidyl ether and polyethylene glycol 400 diacrylate, and the mass ratio of the ethylene glycol diglycidyl ether to the polyethylene glycol 400 diacrylate is 1-1.5: 3.1-5.2.
The salt-resistant antibacterial super absorbent resin and the preparation method thereof also comprise the following steps:
s1: weighing the raw materials according to the weight parts, adding unsaturated sulfonic acid small monomers, nano titanium dioxide, nano silicon dioxide, N' -methylene bisacrylamide and high-substitution-degree cross-linked carboxymethyl cellulose into a reactor, adding deionized water, fully and uniformly mixing, and heating to 55-65 ℃ to obtain a mixed solution;
s2: adding the composite fiber, the composite nano antibacterial agent, 50% of composite cross-linking agent and the antioxidant into the mixed solution obtained in the step S1 to initiate polymerization reaction to obtain polymer gel;
s3: preliminarily pulverizing the polymer gel in step S2, and drying; crushing again, and sieving once to obtain granular polymer gel;
s4: and (4) carrying out surface crosslinking treatment on the granular polymer gel obtained in the step S3 by using 50% by weight of composite crosslinking agent, and sieving for the second time to obtain the salt-resistant antibacterial super absorbent resin.
Compared with the prior art, the invention has the beneficial effects that:
1. the salt-resistant antibacterial super absorbent resin has wide raw material sources, is obtained by adding the saturated sulfonic acid small monomer, greatly improves the salt-resistant activity of the super absorbent resin, and has excellent water absorption performance;
2. according to the invention, the composite nano antibacterial agent is added, so that the prepared salt-resistant antibacterial super absorbent resin has high water absorption and a certain antibacterial effect;
3. the method has the advantages of safety and reliability in the whole preparation process of the prepared salt-resistant antibacterial super absorbent resin, simple and convenient operation steps, no use of organic solvent, no toxicity, no pollution, safety to the environment and the like;
4. the practical use proves that the salt-resistant antibacterial super absorbent resin prepared by the method is applied to sanitary absorbent articles, for example, when the salt-resistant antibacterial super absorbent resin is applied to infant paper diapers, the urine absorption capacity is large, the reverse osmosis capacity is low, the surface layer is dry and comfortable, the antibacterial and odor-removing effects are obvious, and when the infant urine is absorbed, the paper diapers have no obvious sharp urine taste but have light fragrance which is completely different from other water absorbent resin products in the market.
In conclusion, the invention overcomes the defects of the prior art, has reasonable design, safety, reliability, no toxicity, no pollution, better salt resistance and antibacterial property, strong water absorption, higher social use value and application prospect.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The salt-resistant antibacterial super absorbent resin is prepared from the following raw materials in parts by weight:
25 parts of unsaturated sulfonic acid small monomer, 11 parts of nano titanium dioxide, 9 parts of nano silicon dioxide, 11 parts of composite fiber, 3 parts of composite nano antibacterial agent, 7 parts of composite cross-linking agent, 9 parts of N, N' -methylene bisacrylamide, 3 parts of high-substitution-degree cross-linked carboxymethyl cellulose and 1 part of antioxidant.
The composite fiber is prepared from carboxymethyl chitosan, poor saponin, montmorillonite, sepiolite and diatomite.
The unsaturated sulfonic acid small monomer is one or a combination of more of sodium allylsulfonate, sodium styrene sulfonate, sodium vinyl sulfonate, sodium methallyl sulfonate, sodium methallyloxy sulfonate, allylsulfonic acid amine, styrene sulfonic acid amine, vinyl sulfonic acid amine, potassium allylsulfonate, potassium styrene sulfonate, potassium vinyl sulfonate, potassium methallyl sulfonate and potassium methallyloxy sulfonate.
The composite nano antibacterial agent is prepared from the following raw materials in parts by weight:
25 parts of nano-silver, 18 parts of graphene, 8 parts of 2,4, 5-trihydroxybenzene butanone, 12 parts of gamma-polyglutamic acid, 15 parts of solubilizer, 15 parts of halloysite nanotube and 7 parts of 3-aminopropyltriethoxysilane.
The composite cross-linking agent is a mixture of ethylene glycol diglycidyl ether and polyethylene glycol 400 diacrylate, and the mass ratio of the ethylene glycol diglycidyl ether to the polyethylene glycol 400 diacrylate is 1: 3.1.
the salt-resistant antibacterial super absorbent resin and the preparation method thereof also comprise the following steps:
s1: weighing the raw materials according to the weight parts, adding unsaturated sulfonic acid small monomers, nano titanium dioxide, nano silicon dioxide, N' -methylene bisacrylamide and high-substitution-degree cross-linked carboxymethyl cellulose into a reactor, adding deionized water, fully and uniformly mixing, and heating to 55-65 ℃ to obtain a mixed solution;
s2: adding the composite fiber, the composite nano antibacterial agent, 50% of composite cross-linking agent and the antioxidant into the mixed solution obtained in the step S1 to initiate polymerization reaction to obtain polymer gel;
s3: preliminarily pulverizing the polymer gel in step S2, and drying; crushing again, and sieving once to obtain granular polymer gel;
s4: and (4) carrying out surface crosslinking treatment on the granular polymer gel obtained in the step S3 by using 50% by weight of composite crosslinking agent, and sieving for the second time to obtain the salt-resistant antibacterial super absorbent resin.
Example 2
The salt-resistant antibacterial super absorbent resin is prepared from the following raw materials in parts by weight:
31 parts of unsaturated sulfonic acid small monomer, 14 parts of nano titanium dioxide, 11 parts of nano silicon dioxide, 15 parts of composite fiber, 6 parts of composite nano antibacterial agent, 9 parts of composite cross-linking agent, 13 parts of N, N' -methylene bisacrylamide, 5 parts of high-substitution-degree cross-linked carboxymethyl cellulose and 3 parts of antioxidant.
The composite fiber is prepared from carboxymethyl chitosan, poor saponin, montmorillonite, sepiolite and diatomite.
The unsaturated sulfonic acid small monomer is one or a combination of more of sodium allylsulfonate, sodium styrene sulfonate, sodium vinyl sulfonate, sodium methallyl sulfonate, sodium methallyloxy sulfonate, allylsulfonic acid amine, styrene sulfonic acid amine, vinyl sulfonic acid amine, potassium allylsulfonate, potassium styrene sulfonate, potassium vinyl sulfonate, potassium methallyl sulfonate and potassium methallyloxy sulfonate.
The composite nano antibacterial agent is prepared from the following raw materials in parts by weight:
27 parts of nano-silver, 22 parts of graphene, 10 parts of 2,4, 5-trihydroxybenzene butanone, 13.5 parts of gamma-polyglutamic acid, 17.5 parts of solubilizer, 20 parts of halloysite nanotube and 11 parts of 3-aminopropyltriethoxysilane.
The composite cross-linking agent is a mixture of ethylene glycol diglycidyl ether and polyethylene glycol 400 diacrylate, and the mass ratio of the ethylene glycol diglycidyl ether to the polyethylene glycol 400 diacrylate is 1.3: 4.2.
the salt-resistant antibacterial super absorbent resin and the preparation method thereof also comprise the following steps:
s1: weighing the raw materials according to the weight parts, adding unsaturated sulfonic acid small monomers, nano titanium dioxide, nano silicon dioxide, N' -methylene bisacrylamide and high-substitution-degree cross-linked carboxymethyl cellulose into a reactor, adding deionized water, fully and uniformly mixing, and heating to 55-65 ℃ to obtain a mixed solution;
s2: adding the composite fiber, the composite nano antibacterial agent, 50% of composite cross-linking agent and the antioxidant into the mixed solution obtained in the step S1 to initiate polymerization reaction to obtain polymer gel;
s3: preliminarily pulverizing the polymer gel in step S2, and drying; crushing again, and sieving once to obtain granular polymer gel;
s4: and (4) carrying out surface crosslinking treatment on the granular polymer gel obtained in the step S3 by using 50% by weight of composite crosslinking agent, and sieving for the second time to obtain the salt-resistant antibacterial super absorbent resin.
Example 3
The salt-resistant antibacterial super absorbent resin is prepared from the following raw materials in parts by weight:
38 parts of unsaturated sulfonic acid small monomer, 17 parts of nano titanium dioxide, 13 parts of nano silicon dioxide, 19 parts of composite fiber, 8 parts of composite nano antibacterial agent, 11 parts of composite cross-linking agent, 17 parts of N, N' -methylene bisacrylamide, 7 parts of high-substitution-degree cross-linked carboxymethyl cellulose and 5 parts of antioxidant.
The composite fiber is prepared from carboxymethyl chitosan, poor saponin, montmorillonite, sepiolite and diatomite.
The unsaturated sulfonic acid small monomer is one or a combination of more of sodium allylsulfonate, sodium styrene sulfonate, sodium vinyl sulfonate, sodium methallyl sulfonate, sodium methallyloxy sulfonate, allylsulfonic acid amine, styrene sulfonic acid amine, vinyl sulfonic acid amine, potassium allylsulfonate, potassium styrene sulfonate, potassium vinyl sulfonate, potassium methallyl sulfonate and potassium methallyloxy sulfonate.
The composite nano antibacterial agent is prepared from the following raw materials in parts by weight:
30 parts of nano-silver, 25 parts of graphene, 12 parts of 2,4, 5-trihydroxybenzene butanone, 15 parts of gamma-polyglutamic acid, 20 parts of solubilizer, 25 parts of halloysite nanotube and 15 parts of 3-aminopropyltriethoxysilane.
The composite cross-linking agent is a mixture of ethylene glycol diglycidyl ether and polyethylene glycol 400 diacrylate, and the mass ratio of the ethylene glycol diglycidyl ether to the polyethylene glycol 400 diacrylate is 1.5: 5.2.
the salt-resistant antibacterial super absorbent resin and the preparation method thereof also comprise the following steps:
s1: weighing the raw materials according to the weight parts, adding unsaturated sulfonic acid small monomers, nano titanium dioxide, nano silicon dioxide, N' -methylene bisacrylamide and high-substitution-degree cross-linked carboxymethyl cellulose into a reactor, adding deionized water, fully and uniformly mixing, and heating to 55-65 ℃ to obtain a mixed solution;
s2: adding the composite fiber, the composite nano antibacterial agent, 50% of composite cross-linking agent and the antioxidant into the mixed solution obtained in the step S1 to initiate polymerization reaction to obtain polymer gel;
s3: preliminarily pulverizing the polymer gel in step S2, and drying; crushing again, and sieving once to obtain granular polymer gel;
s4: and (4) carrying out surface crosslinking treatment on the granular polymer gel obtained in the step S3 by using 50% by weight of composite crosslinking agent, and sieving for the second time to obtain the salt-resistant antibacterial super absorbent resin.
Comparative example 1
The salt-resistant antibacterial super absorbent resin is prepared from the following raw materials in parts by weight:
11 parts of nano titanium dioxide, 9 parts of nano silicon dioxide, 11 parts of composite fiber, 3 parts of composite nano antibacterial agent, 7 parts of composite cross-linking agent, 9 parts of N, N' -methylene bisacrylamide, 3 parts of high-substitution-degree cross-linked carboxymethyl cellulose and 1 part of antioxidant.
The composite fiber is prepared from carboxymethyl chitosan, poor saponin, montmorillonite, sepiolite and diatomite.
The composite nano antibacterial agent is prepared from the following raw materials in parts by weight:
25 parts of nano-silver, 18 parts of graphene, 8 parts of 2,4, 5-trihydroxybenzene butanone, 12 parts of gamma-polyglutamic acid, 15 parts of solubilizer, 15 parts of halloysite nanotube and 7 parts of 3-aminopropyltriethoxysilane.
The composite cross-linking agent is a mixture of ethylene glycol diglycidyl ether and polyethylene glycol 400 diacrylate, and the mass ratio of the ethylene glycol diglycidyl ether to the polyethylene glycol 400 diacrylate is 1: 3.1.
the salt-resistant antibacterial super absorbent resin and the preparation method thereof also comprise the following steps:
s1: weighing the raw materials according to the weight parts, adding nano titanium dioxide, nano silicon dioxide, N' -methylene bisacrylamide and high-substitution-degree crosslinked carboxymethyl cellulose into a reactor, adding deionized water, fully and uniformly mixing, and heating to 55-65 ℃ to obtain a mixed solution;
s2: adding the composite fiber, the composite nano antibacterial agent, 50% of composite cross-linking agent and the antioxidant into the mixed solution obtained in the step S1 to initiate polymerization reaction to obtain polymer gel;
s3: preliminarily pulverizing the polymer gel in step S2, and drying; crushing again, and sieving once to obtain granular polymer gel;
s4: and (4) carrying out surface crosslinking treatment on the granular polymer gel obtained in the step S3 by using 50% by weight of composite crosslinking agent, and sieving for the second time to obtain the salt-resistant antibacterial super absorbent resin.
Comparative example 2
The salt-resistant antibacterial super absorbent resin is prepared from the following raw materials in parts by weight:
25 parts of unsaturated sulfonic acid small monomer, 11 parts of nano titanium dioxide, 9 parts of nano silicon dioxide, 11 parts of composite fiber, 7 parts of composite cross-linking agent, 9 parts of N, N' -methylene bisacrylamide, 3 parts of high-substitution-degree cross-linked carboxymethyl cellulose and 1 part of antioxidant.
The composite fiber is prepared from carboxymethyl chitosan, poor saponin, montmorillonite, sepiolite and diatomite.
The unsaturated sulfonic acid small monomer is one or a combination of more of sodium allylsulfonate, sodium styrene sulfonate, sodium vinyl sulfonate, sodium methallyl sulfonate, sodium methallyloxy sulfonate, allylsulfonic acid amine, styrene sulfonic acid amine, vinyl sulfonic acid amine, potassium allylsulfonate, potassium styrene sulfonate, potassium vinyl sulfonate, potassium methallyl sulfonate and potassium methallyloxy sulfonate.
The composite cross-linking agent is a mixture of ethylene glycol diglycidyl ether and polyethylene glycol 400 diacrylate, and the mass ratio of the ethylene glycol diglycidyl ether to the polyethylene glycol 400 diacrylate is 1: 3.1.
the salt-resistant antibacterial super absorbent resin and the preparation method thereof also comprise the following steps:
s1: weighing the raw materials according to the weight parts, adding unsaturated sulfonic acid small monomers, nano titanium dioxide, nano silicon dioxide, N' -methylene bisacrylamide and high-substitution-degree cross-linked carboxymethyl cellulose into a reactor, adding deionized water, fully and uniformly mixing, and heating to 55-65 ℃ to obtain a mixed solution;
s2: adding the composite fiber, 50% of composite cross-linking agent and antioxidant in parts by weight into the mixed solution obtained in the step S1 to initiate polymerization reaction to obtain polymer gel;
s3: preliminarily pulverizing the polymer gel in step S2, and drying; crushing again, and sieving once to obtain granular polymer gel;
s4: and (4) carrying out surface crosslinking treatment on the granular polymer gel obtained in the step S3 by using 50% by weight of composite crosslinking agent, and sieving for the second time to obtain the salt-resistant antibacterial super absorbent resin.
Comparative example 3
The salt-resistant antibacterial super absorbent resin is prepared from the following raw materials in parts by weight:
25 parts of unsaturated sulfonic acid small monomer, 11 parts of nano titanium dioxide, 9 parts of nano silicon dioxide, 11 parts of composite fiber, 3 parts of composite nano antibacterial agent, 7 parts of composite cross-linking agent, 3 parts of high-substitution-degree cross-linked carboxymethyl cellulose and 1 part of antioxidant.
The composite fiber is prepared from carboxymethyl chitosan, poor saponin, montmorillonite, sepiolite and diatomite.
The unsaturated sulfonic acid small monomer is one or a combination of more of sodium allylsulfonate, sodium styrene sulfonate, sodium vinyl sulfonate, sodium methallyl sulfonate, sodium methallyloxy sulfonate, allylsulfonic acid amine, styrene sulfonic acid amine, vinyl sulfonic acid amine, potassium allylsulfonate, potassium styrene sulfonate, potassium vinyl sulfonate, potassium methallyl sulfonate and potassium methallyloxy sulfonate.
The composite nano antibacterial agent is prepared from the following raw materials in parts by weight:
25 parts of nano-silver, 18 parts of graphene, 8 parts of 2,4, 5-trihydroxybenzene butanone, 12 parts of gamma-polyglutamic acid, 15 parts of solubilizer, 15 parts of halloysite nanotube and 7 parts of 3-aminopropyltriethoxysilane.
The composite cross-linking agent is a mixture of ethylene glycol diglycidyl ether and polyethylene glycol 400 diacrylate, and the mass ratio of the ethylene glycol diglycidyl ether to the polyethylene glycol 400 diacrylate is 1: 3.1.
the salt-resistant antibacterial super absorbent resin and the preparation method thereof also comprise the following steps:
s1: weighing the raw materials according to the weight parts, adding unsaturated sulfonic acid small monomers, nano titanium dioxide, nano silicon dioxide and high-substitution-degree crosslinked carboxymethyl cellulose into a reactor, adding deionized water, fully and uniformly mixing, and heating to 55-65 ℃ to obtain a mixed solution;
s2: adding the composite fiber, the composite nano antibacterial agent, 50% of composite cross-linking agent and the antioxidant into the mixed solution obtained in the step S1 to initiate polymerization reaction to obtain polymer gel;
s3: preliminarily pulverizing the polymer gel in step S2, and drying; crushing again, and sieving once to obtain granular polymer gel;
s4: and (4) carrying out surface crosslinking treatment on the granular polymer gel obtained in the step S3 by using 50% by weight of composite crosslinking agent, and sieving for the second time to obtain the salt-resistant antibacterial super absorbent resin.
The salt-resistant antibacterial super absorbent resins prepared in examples 1 to 3 and comparative examples 1 to 3 were subjected to performance tests, which included: distilled water absorption, tap water absorption containing different metal ions, 1 wt% sodium chloride aqueous solution absorption, staphylococcus aureus-antibacterial rate and escherichia coli-antibacterial rate, and selecting common water-absorbent resin on the market as a control group; the antibacterial performance is determined according to GB/T20944.3-2008, evaluation 3 part of antibacterial performance of textiles;
the water absorption test method comprises the following steps: taking salt-resistant antibacterial super absorbent resin (m) with certain dry constant weight1) Placing in a large amount of distilled water, tap water containing different metal ions and 1 wt% sodium chloride aqueous solution, waiting for water saturation, and adsorbing water on the surface of the resin with filter paper to obtain a weight m2(three times of weighing the mixture without change in weight). Water absorption Q ═ m2-m1)/m1The unit is g/g, three times are carried out in each experiment, and the average value is obtained.
The bacteriostatic experiment method comprises the following steps: 0.10g of the super absorbent resin powder obtained in examples 1 to 3 and comparative examples 1 to 3, 18mL of physiological saline solution and 1mL of LB liquid medium were added to a 100mL conical flask, 1mL of cultured Staphylococcus aureus solution was added after autoclaving, and shaking culture was performed in a shaker (37 ℃ C., 150rpm) for 8 hours without adding a resin sample to the blank control. Using a pipette gun to pipette 0.5mL of bacterial liquid from a conical flask, diluting the bacterial liquid by 10-6 and 10-7, coating the diluted bacterial liquid on a flat plate, coating three culture dishes for each dilution, culturing the bacterial liquid in an incubator at 37 ℃ for 24 hours, observing the growth condition of bacteria, calculating the number of bacterial colonies on each flat plate, and taking the average value of the bacterial colonies;
calculating the resin bacteriostasis rate according to a formula: eta ═ N1-N2)/N1. Wherein N is1Denotes the average number of colonies on the blank control plate, N2Showing the bacteria-containing solution in the culture dish after the resin sample is addedAverage number of colonies on;
the test results are shown in table 1:
as can be seen from table 1, the salt-resistant antibacterial super absorbent resins prepared in examples 1 to 3 of the present invention have significant properties relative to comparative examples 1 to 3 and a control, wherein the salt-resistant antibacterial super absorbent resin prepared in example 2 has the best salt-resistant antibacterial property and absorption property.
Comparing the performance of the water-absorbent resin of comparative example 1 with that of the salt-resistant antibacterial super-absorbent resin of example 1, the salt-resistant super-absorbent resin can be obtained by adding the unsaturated sulfonic acid small monomer, so that the salt-resistant super-absorbent resin has high water absorption and salt resistance;
comparing the performance of the water-absorbent resin of comparative example 2 with that of the salt-resistant antibacterial super absorbent resin of example 1, it can be obtained that the water-absorbent resin has a certain antibacterial effect while having high water absorption by adding the composite nano antibacterial agent;
comparing the performance of the water-absorbent resin of comparative example 3 with that of the salt-resistant antibacterial super-absorbent resin of example 1, the water-absorbent resin of comparative example 3 can be obtained, and by adding N, N' -methylene bisacrylamide, the water-absorbent resin has good antibacterial and salt-resistant performance, high water absorption and is convenient to popularize and use.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The salt-resistant antibacterial super absorbent resin is characterized by being prepared from the following raw materials in parts by weight:
25-38 parts of unsaturated sulfonic acid small monomer, 11-17 parts of nano titanium dioxide, 9-13 parts of nano silicon dioxide, 11-19 parts of composite fiber, 3-8 parts of composite nano antibacterial agent, 7-11 parts of composite cross-linking agent, 9-17 parts of N, N' -methylene bisacrylamide, 3-7 parts of high-substitution-degree cross-linked carboxymethyl cellulose and 1-5 parts of antioxidant.
2. The salt-resistant antibacterial super absorbent resin as claimed in claim 1, wherein the composite fiber is made of carboxymethyl chitosan, poor saponin, montmorillonite, sepiolite and diatomite.
3. The salt-resistant antibacterial super absorbent resin as claimed in claim 1, wherein the unsaturated sulfonic acid small monomer is one or more selected from sodium allyl sulfonate, sodium styrene sulfonate, sodium vinyl sulfonate, sodium methallyl sulfonate, sodium methallyloxy sulfonate, amine allyl sulfonate, amine styrene sulfonate, amine vinyl sulfonate, potassium allyl sulfonate, potassium styrene sulfonate, potassium vinyl sulfonate, potassium methallyl sulfonate, and potassium methallyloxy sulfonate.
4. The salt-resistant antibacterial super absorbent resin as claimed in claim 1, wherein the composite nano antibacterial agent is prepared from the following raw materials in parts by weight:
25-30 parts of nano silver, 18-25 parts of graphene, 8-12 parts of 2,4, 5-trihydroxybenzene butanone, 12-15 parts of gamma-polyglutamic acid, 15-20 parts of solubilizer, 15-25 parts of halloysite nanotube and 7-15 parts of 3-aminopropyltriethoxysilane.
5. The salt-resistant antibacterial super absorbent resin as claimed in claim 1, wherein the composite cross-linking agent is a mixture of ethylene glycol diglycidyl ether and polyethylene glycol 400 diacrylate in a mass ratio of 1-1.5: 3.1-5.2.
6. A salt-resistant antibacterial super absorbent resin and a preparation method thereof, the salt-resistant antibacterial super absorbent resin as claimed in any one of claims 1 to 5 is prepared, and the method further comprises the following steps:
s1: weighing the raw materials according to the weight parts, adding unsaturated sulfonic acid small monomers, nano titanium dioxide, nano silicon dioxide, N' -methylene bisacrylamide and high-substitution-degree cross-linked carboxymethyl cellulose into a reactor, adding deionized water, fully and uniformly mixing, and heating to 55-65 ℃ to obtain a mixed solution;
s2: adding the composite fiber, the composite nano antibacterial agent, 50% of composite cross-linking agent and the antioxidant into the mixed solution obtained in the step S1 to initiate polymerization reaction to obtain polymer gel;
s3: preliminarily pulverizing the polymer gel in step S2, and drying; crushing again, and sieving once to obtain granular polymer gel;
s4: and (4) carrying out surface crosslinking treatment on the granular polymer gel obtained in the step S3 by using 50% by weight of composite crosslinking agent, and sieving for the second time to obtain the salt-resistant antibacterial super absorbent resin.
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