CN111215039B - Adsorption material for paper diapers, and preparation method and application thereof - Google Patents
Adsorption material for paper diapers, and preparation method and application thereof Download PDFInfo
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Abstract
The invention discloses an adsorption material for paper diapers, and a preparation method and application thereof, wherein the adsorption material for paper diapers is prepared from the following raw materials in parts by weight: 100-125 parts of polyacrylic acid super absorbent resin, 45-53 parts of poly (acrylic acid-acrylamide) super absorbent resin, 30-36 parts of acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin, 22-27 parts of graphene oxide and 8-11 parts of carboxyl carbon nano tubes. The adsorption material for the paper diaper has high urine absorption speed and large absorption capacity; the rewet amount is low, the adsorption is firm, the urine leakage phenomenon can be effectively reduced in the actual use, and the use comfort of infants is improved; the product has the effect of absorbing the irritant gases such as ammonia gas and the like, and can effectively reduce the peculiar smell in the use process; the antibacterial agent also has certain antibacterial effect, can inhibit the growth rate of bacteria, and further reduces the peculiar smell in the use process; in actual use, the infant has high comfort level.
Description
Technical Field
The invention relates to the technical field of adsorption materials and paper diapers, in particular to an adsorption material for paper diapers, and a preparation method and application thereof.
Background
The disposable diaper is a disposable nursing sanitary article, and the sanitary article is convenient to use and replace, so that the burden of nursing staff is greatly reduced. Generally, diapers are capable of capturing and absorbing urine, dispersing urine, or diffusing urine throughout the core, ultimately absorbing and storing urine. A typical pant diaper has a waist feature for securing the pant diaper. In order to prevent side leakage, two leakage-proof folded edges are usually added in the paper diaper.
Wherein, the paper diaper is good or bad mainly to look at the core body, and the good core body means the paper diaper is good or bad; the absorbent material used to prepare the absorbent core of the diaper often determines how good the absorbent core of the diaper is.
The absorbent material for paper diapers currently used also has the following problems:
1. the absorption effect is poor (the absorption rate is low), especially the absorption capacity of urine (due to sodium, potassium salt and the like in the urine) is small, the absorption rate is low, excessive urine leakage is easily caused by untimely absorption in the use process, and the use comfort is low;
2. the rewet amount is high, and after absorption, especially after absorption of urine (due to sodium, potassium and the like in the urine), the rewet amount is easy to cause urine leakage due to external force such as backlog and the like, and the use comfort is low;
3. Only water in urine can be adsorbed, but the urine has no adsorption function on the irritant gases such as ammonia gas and the like, has no deodorization function in the use process, and has low use comfort;
4. the antibacterial agent has no antibacterial effect, or nano silver and other antibacterial agents are required to be added, so that the adsorption material is hard and heavy, and the use comfort is low.
Disclosure of Invention
Based on the above, the invention aims to provide an adsorption material for paper diapers, and a preparation method and application thereof, which can effectively solve the problems.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
an adsorption material for paper diapers is prepared from the following raw materials in parts by weight:
100 to 125 parts of polyacrylic acid super absorbent resin,
45-53 parts of poly (acrylic acid-acrylamide) super absorbent resin,
30-36 parts of acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous high water-absorbent resin,
22-27 parts of graphene oxide,
8-11 parts of carboxyl carbon nano tube;
the ratio of monomer units in the macromolecular chain of the poly (acrylic acid-acrylamide) super absorbent resin is acrylic acid: acrylamide = 10: (8.5-12.5);
the ratio of monomer units in the macromolecular chain of the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous high-hydroscopicity resin is acrylic acid: acrylamide: 2-acrylamide-2-methylpropanesulfonic acid=10: (7-9): (3.5-4.5);
The graphene oxide is edge graphene oxide; the groups grafted on the single edge of the edge graphene oxide comprise carboxyl, hydroxyl, epoxy and carbonyl, wherein the relative content of the carboxyl is 37.5-41.8%, and the relative content of the hydroxyl is 29.2-32.4%.
The adsorption material for the paper diaper is prepared by carefully selecting raw materials, optimizing the content of the raw materials, selecting polyacrylic acid super absorbent resin, poly (acrylic acid-acrylamide) super absorbent resin, acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin, graphene oxide and carboxyl carbon nano tubes with proper proportion, and fully playing respective advantages, supplementing each other and promoting each other, wherein the prepared adsorption material for the paper diaper has high urine absorption speed and large urine absorption capacity; the rewet amount is low, the adsorption is firm, the urine leakage phenomenon can be effectively reduced in the actual use, and the use comfort of infants is improved; the product has the effect of absorbing the irritant gases such as ammonia gas and the like, and can effectively reduce the peculiar smell in the use process; the product also has certain antibacterial effect, can inhibit the growth rate of bacteria, and further reduce the peculiar smell in the use process (slow down the putrefaction and deodorization of organic matters in urine and the like through antibacterial effect); in actual use, the infant has high comfort level.
The raw materials of the adsorption material for the paper diaper adopt polyacrylic acid super absorbent resin, poly (acrylic acid-acrylamide) super absorbent resin and acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin with proper proportion as the main raw materials of the adsorption material for the paper diaper,
the ratio of monomer units in the macromolecular chain of the poly (acrylic acid-acrylamide) super absorbent resin is acrylic acid: acrylamide = 10: (8.5-12.5);
the ratio of monomer units in the macromolecular chain of the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous high-hydroscopicity resin is acrylic acid: acrylamide: 2-acrylamide-2-methylpropanesulfonic acid=10: (7-9): (3.5-4.5);
the polyacrylic acid super absorbent resin has high water absorption performance and high water absorption speed, but has poor absorption effect on saline water (urine); the poly (acrylic acid-acrylamide) super absorbent resin has higher water absorption performance and higher water absorption speed, but has better absorption effect on saline water (urine) and firm absorption; the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous high-hydroscopicity resin has higher hydroscopicity and higher hydroscopicity, but has better absorption effect on saline water (urine) and firm absorption, is especially suitable for aqueous solutions of various salts, and in addition, the sulfonic acid group can react with ammonia gas to solidify and absorb; the three materials are matched with each other to play a good synergistic effect, so that the adsorption material for the paper diaper has high absorption speed and large absorption capacity on urine; the rewet amount is low, the adsorption is firm, the urine leakage phenomenon can be effectively reduced in the actual use, and the use comfort of infants is improved.
In the raw material of the adsorption material for the paper diaper, the (nano) graphene oxide with a proper proportion is selected, wherein the graphene oxide is edge graphene oxide; the groups grafted on the single edge of the edge graphene oxide comprise carboxyl, hydroxyl, epoxy and carbonyl, wherein the relative content of the carboxyl is 37.5-41.8%, and the relative content of the hydroxyl is 29.2-32.4%. The graphene oxide has low oxidation degree and a relatively intact crystal structure, has good effect of adsorbing irritant gases such as ammonia gas (the relative content of carboxyl is 37.5-41.8%, the relative content of hydroxyl is 29.2-32.4%, the relative content of epoxy groups and carbonyl groups is low, the relative content of carboxyl and hydroxyl is high, the ion exchange adsorptivity is high, the carboxyl can also react with ammonia gas, and the curing and adsorption) and has antibacterial and antibacterial effects, and peculiar smell in the use process can be effectively reduced.
The raw materials of the adsorption material for the paper diaper adopt (nano) carboxyl carbon nano tubes with proper proportion, and are matched with (nano) graphene oxide, so that the adsorption material for the paper diaper has a three-dimensional network structure for supporting polyacrylic acid super absorbent resin, poly (acrylic acid-acrylamide) super absorbent resin and acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin, the adsorption resin in the adsorption material for the paper diaper is loose and porous, and the (nano) carboxyl carbon nano tubes also have the function of liquid guiding (urine), so that the adsorption speed can be further accelerated; also has certain ammonia adsorption and solidification adsorption effects.
The invention also provides a preparation method of the adsorption material for the paper diaper, which comprises the following steps:
A. respectively weighing the polyacrylic acid super absorbent resin, the poly (acrylic acid-acrylamide) super absorbent resin, the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin, the graphene oxide and the carboxyl carbon nano tube according to parts by weight;
B. drying polyacrylic acid super absorbent resin, poly (acrylic acid-acrylamide) super absorbent resin and acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin in vacuum at 55-60 ℃ until the water content is lower than 8%;
C. mixing the dried polyacrylic acid super absorbent resin, the poly (acrylic acid-acrylamide) super absorbent resin and the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin, adding graphene oxide and carboxyl carbon nano tubes, and sending the mixture into a pulverizer for pulverizing until the particle size is less than 100 microns to obtain a primary mixture;
D. mixing the primary mixture with more than 2000 times of deionized water in parts by weight, stirring for more than 2 hours, and filtering to obtain water-absorbing gel;
E. And freezing the water-absorbing gel through liquid nitrogen, and drying in a freeze dryer until the moisture content is lower than 5%, thereby obtaining the absorbent material for the paper diaper.
In the preparation method of the adsorption material for the paper diaper, the graphene oxide and carboxyl carbon nano tube particles are fine (nano-scale), in the step C, the graphene oxide and carboxyl carbon nano tube are absorbed into the internal space of a three-dimensional network structure, and then the three-dimensional network structure of the polyacrylic acid super absorbent resin, the poly (acrylic acid-acrylamide) super absorbent resin, the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary copolymer porous super absorbent resin is kept good by freezing and drying at low temperature, the graphene oxide and carboxyl carbon nano tube are uniformly distributed in the three-dimensional network structure, and the three-dimensional network structure of the polyacrylic acid super absorbent resin, the poly (acrylic acid-acrylamide) super absorbent resin, the acrylic acid/acrylamide/2-methylpropanesulfonic acid ternary copolymer porous resin is kept good, and the graphene oxide and carboxyl carbon nano tube have good three-dimensional network structure of the polyacrylic acid/2-methylpropanesulfonic acid ternary copolymer porous resin, the adsorption material for the paper diaper is loose and porous, the adsorption speed is high, and the adsorption capacity is large.
Preferably, the absorbent material for the paper diaper is prepared from the following raw materials in parts by weight:
105-120 parts of polyacrylic acid super absorbent resin,
48-51 parts of poly (acrylic acid-acrylamide) super absorbent resin,
32-34 parts of acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous high water-absorbing resin,
23-26 parts of graphene oxide,
8.5 to 10 parts of carboxyl carbon nano-tubes;
the ratio of monomer units in the macromolecular chain of the poly (acrylic acid-acrylamide) super absorbent resin is acrylic acid: acrylamide = 10: (9.5-12);
the ratio of monomer units in the macromolecular chain of the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous high-hydroscopicity resin is acrylic acid: acrylamide: 2-acrylamide-2-methylpropanesulfonic acid=10: (7.8-8.5): (3.9-4.4);
the graphene oxide is edge graphene oxide; the groups grafted on the single edge of the edge graphene oxide comprise carboxyl, hydroxyl, epoxy and carbonyl, wherein the relative content of the carboxyl is 38.5-41.2%, and the relative content of the hydroxyl is 30.7-31.5%.
Preferably, the absorbent material for the paper diaper is prepared from the following raw materials in parts by weight:
114 parts of polyacrylic acid super absorbent resin,
49 parts of poly (acrylic acid-acrylamide) super absorbent resin,
33 parts of acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin,
24.5 parts of graphene oxide,
And 9.2 parts of carboxyl carbon nano tube.
Preferably, the ratio of monomer units in the macromolecular chain of the poly (acrylic acid-acrylamide) super absorbent resin is acrylic acid: acrylamide = 10:11.
preferably, the ratio of monomer units in the macromolecular chain of the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin is acrylic acid: acrylamide: 2-acrylamide-2-methylpropanesulfonic acid=10: 8.5:4.2.
preferably, the groups grafted on the single edge of the edge graphene oxide comprise carboxyl, hydroxyl, epoxy and carbonyl, wherein the relative content of carboxyl is 39.6% and the relative content of hydroxyl is 30.1%.
Preferably, the graphene oxide is nano graphene oxide; the carboxyl carbon nano-tube is a nano carboxyl carbon nano-tube.
The invention also provides a paper diaper, and the moisture absorption core body of the paper diaper is made of the adsorption material for the paper diaper.
Preferably, the diaper is a suspended core omnibearing leakproof diaper, the suspended core omnibearing leakproof diaper comprises a moisture absorption core body and a waterproof layer, the moisture absorption core body comprises a front waistline part, a crotch part and a rear waistline part which are respectively attached to a human body, the outer surface of the front waistline part, the middle of the outer surface of the crotch part and the outer surface of the rear waistline part of the moisture absorption core body are attached to the waterproof layer through hot melt adhesives, moisture absorption grooves are formed between the two sides of the crotch part of the moisture absorption core body and the waterproof layer respectively, a first water-repellent non-woven fabric is attached to the inner surface of the front waistline part, and a second water-repellent non-woven fabric is attached to the inner surface of the rear waistline part.
Preferably, the two side edges of the waterproof layer are provided with a first elastic band and a second elastic band, the first elastic band is bent upwards to form a surrounding edge, the first elastic band is located at the inner side edge of the moisture absorption groove, and the second elastic band is located at the outer side edge of the moisture absorption groove.
Preferably, a third elastic band is transversely arranged between the waterproof layer and the rear waistline part, side waist patches are respectively arranged at two ends of the third elastic band, and a front waist patch matched with the two side waist patches is arranged on the outer surface of the waterproof layer at the front waistline part.
Preferably, a transverse front urine-repellent passage is formed between the first water-repellent nonwoven fabric and the front waistline portion.
Preferably, a transverse rear urine-repellent passage is formed between the second water-repellent nonwoven fabric and the rear waistline portion.
Preferably, the absorbent core has a plurality of absorbent particles distributed therein.
Preferably, the waterproof layer comprises an outermost waterproof nonwoven fabric.
Compared with the prior art, the invention has the following advantages:
the adsorption material for the paper diaper is prepared by carefully selecting raw materials, optimizing the content of the raw materials, selecting polyacrylic acid super absorbent resin, poly (acrylic acid-acrylamide) super absorbent resin, acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin, graphene oxide and carboxyl carbon nano tubes with proper proportion, and fully playing respective advantages, supplementing each other and promoting each other, wherein the prepared adsorption material for the paper diaper has high urine absorption speed and large urine absorption capacity; the rewet amount is low, the adsorption is firm, the urine leakage phenomenon can be effectively reduced in the actual use, and the use comfort of infants is improved; the product has the effect of absorbing the irritant gases such as ammonia gas and the like, and can effectively reduce the peculiar smell in the use process; the product also has certain antibacterial effect, can inhibit the growth rate of bacteria, and further reduce the peculiar smell in the use process (slow down the putrefaction and deodorization of organic matters in urine and the like through antibacterial effect); in actual use, the infant has high comfort level.
The raw materials of the adsorption material for the paper diaper adopt polyacrylic acid super absorbent resin, poly (acrylic acid-acrylamide) super absorbent resin and acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin with proper proportion as the main raw materials of the adsorption material for the paper diaper,
the ratio of monomer units in the macromolecular chain of the poly (acrylic acid-acrylamide) super absorbent resin is acrylic acid: acrylamide = 10: (8.5-12.5);
the ratio of monomer units in the macromolecular chain of the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous high-hydroscopicity resin is acrylic acid: acrylamide: 2-acrylamide-2-methylpropanesulfonic acid=10: (7-9): (3.5-4.5);
the polyacrylic acid super absorbent resin has high water absorption performance and high water absorption speed, but has poor absorption effect on saline water (urine); the poly (acrylic acid-acrylamide) super absorbent resin has higher water absorption performance and higher water absorption speed, but has better absorption effect on saline water (urine) and firm absorption; the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous high-hydroscopicity resin has higher hydroscopicity and higher hydroscopicity, but has better absorption effect on saline water (urine) and firm absorption, is especially suitable for aqueous solutions of various salts, and in addition, the sulfonic acid group can react with ammonia gas to solidify and absorb; the three materials are matched with each other to play a good synergistic effect, so that the adsorption material for the paper diaper has high absorption speed and large absorption capacity on urine; the rewet amount is low, the adsorption is firm, the urine leakage phenomenon can be effectively reduced in the actual use, and the use comfort of infants is improved.
In the raw material of the adsorption material for the paper diaper, the (nano) graphene oxide with a proper proportion is selected, wherein the graphene oxide is edge graphene oxide; the groups grafted on the single edge of the edge graphene oxide comprise carboxyl, hydroxyl, epoxy and carbonyl, wherein the relative content of the carboxyl is 37.5-41.8%, and the relative content of the hydroxyl is 29.2-32.4%. The graphene oxide has low oxidation degree and a relatively intact crystal structure, has good effect of adsorbing irritant gases such as ammonia gas (the relative content of carboxyl is 37.5-41.8%, the relative content of hydroxyl is 29.2-32.4%, the relative content of epoxy groups and carbonyl groups is low, the relative content of carboxyl and hydroxyl is high, the ion exchange adsorptivity is high, the carboxyl can also react with ammonia gas, and the curing and adsorption) and has antibacterial and antibacterial effects, and peculiar smell in the use process can be effectively reduced.
The raw materials of the adsorption material for the paper diaper adopt (nano) carboxyl carbon nano tubes with proper proportion, and are matched with (nano) graphene oxide, so that the adsorption material for the paper diaper has a three-dimensional network structure for supporting polyacrylic acid super absorbent resin, poly (acrylic acid-acrylamide) super absorbent resin and acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin, the adsorption resin in the adsorption material for the paper diaper is loose and porous, and the (nano) carboxyl carbon nano tubes also have the function of liquid guiding (urine), so that the adsorption speed can be further accelerated; also has certain ammonia adsorption and solidification adsorption effects.
In the preparation method of the adsorption material for the paper diaper, the graphene oxide and carboxyl carbon nano tube particles are fine (nano-scale), in the step C, the graphene oxide and carboxyl carbon nano tube are absorbed into the internal space of a three-dimensional network structure, and then the three-dimensional network structure of the polyacrylic acid super absorbent resin, the poly (acrylic acid-acrylamide) super absorbent resin, the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary copolymer porous super absorbent resin is kept good by freezing and drying at low temperature, the graphene oxide and carboxyl carbon nano tube are uniformly distributed in the three-dimensional network structure, and the three-dimensional network structure of the polyacrylic acid super absorbent resin, the poly (acrylic acid-acrylamide) super absorbent resin, the acrylic acid/acrylamide/2-methylpropanesulfonic acid ternary copolymer porous resin is kept good, and the graphene oxide and carboxyl carbon nano tube have good three-dimensional network structure of the polyacrylic acid/2-methylpropanesulfonic acid ternary copolymer porous resin, the adsorption material for the paper diaper is loose and porous, the adsorption speed is high, and the adsorption capacity is large.
In addition, the absorbent core body is arranged to be attached to the front waistline part, the crotch part and the rear waistline part of the human body, so that the diaper is attached to the human body more, the two sides of the crotch part of the absorbent core body are not attached to the waterproof layer, the two sides of the crotch part of the absorbent core body are not sprayed with hot melt adhesive and form absorbent grooves with the waterproof layer respectively, when urine reaches the absorbent grooves, the absorbent core body can absorb the moisture up and down simultaneously, the urine absorption speed is increased, urine is blocked by the first water-repellent non-woven fabric and the second water-repellent non-woven fabric respectively, the occurrence of the front leakage and the rear leakage of the diaper is reduced, namely, the left side, the right side, the front end and the rear end of the diaper can be blocked by the urine, and 360-degree omnibearing leakage prevention is realized.
Drawings
Fig. 1 is a schematic structural diagram of a diaper according to an embodiment of the invention.
Fig. 2 is a schematic view of a partial structure of a diaper according to an embodiment of the invention.
The marks in the figure: 1. an absorbent core; 2. a waterproof layer; 3. a front waistline portion; 4. a crotch part; 5. a rear waistline portion; 6. a moisture absorption groove; 7. a first water-repellent nonwoven fabric; 8. a second water-repellent nonwoven fabric; 9. a first elastic band; 10. a second elastic band; 11. a third elastic band; 12. a side waist patch; 13. front waist patch; 14. a front urine-free passage; 15. posterior urine evacuation channel.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, preferred embodiments of the present invention will be described below with reference to specific examples, but should not be construed as limiting the present patent.
The test methods or test methods described in the following examples are all conventional methods unless otherwise specified; the reagents and materials, unless otherwise specified, are obtained from conventional commercial sources or prepared in conventional manner.
Example 1:
an adsorption material for paper diapers is prepared from the following raw materials in parts by weight:
100 to 125 parts of polyacrylic acid super absorbent resin,
45-53 parts of poly (acrylic acid-acrylamide) super absorbent resin,
30-36 parts of acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous high water-absorbent resin,
22-27 parts of graphene oxide,
8-11 parts of carboxyl carbon nano tube;
the ratio of monomer units in the macromolecular chain of the poly (acrylic acid-acrylamide) super absorbent resin is acrylic acid: acrylamide = 10: (8.5-12.5);
the ratio of monomer units in the macromolecular chain of the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous high-hydroscopicity resin is acrylic acid: acrylamide: 2-acrylamide-2-methylpropanesulfonic acid=10: (7-9): (3.5-4.5);
The graphene oxide is edge graphene oxide; the groups grafted on the single edge of the edge graphene oxide comprise carboxyl, hydroxyl, epoxy and carbonyl, wherein the relative content of the carboxyl is 37.5-41.8%, and the relative content of the hydroxyl is 29.2-32.4%.
The embodiment also provides a preparation method of the adsorption material for the paper diaper, which comprises the following steps:
A. respectively weighing the polyacrylic acid super absorbent resin, the poly (acrylic acid-acrylamide) super absorbent resin, the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin, the graphene oxide and the carboxyl carbon nano tube according to parts by weight;
B. drying polyacrylic acid super absorbent resin, poly (acrylic acid-acrylamide) super absorbent resin and acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin in vacuum at 55-60 ℃ until the water content is lower than 8%;
C. mixing the dried polyacrylic acid super absorbent resin, the poly (acrylic acid-acrylamide) super absorbent resin and the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin, adding graphene oxide and carboxyl carbon nano tubes, and sending the mixture into a pulverizer for pulverizing until the particle size is less than 100 microns to obtain a primary mixture;
D. Mixing the primary mixture with more than 2000 times of deionized water in parts by weight, stirring for more than 2 hours, and filtering to obtain water-absorbing gel;
E. and freezing the water-absorbing gel through liquid nitrogen, and drying in a freeze dryer until the moisture content is lower than 5%, thereby obtaining the absorbent material for the paper diaper.
Preferably, the absorbent material for the paper diaper is prepared from the following raw materials in parts by weight:
105-120 parts of polyacrylic acid super absorbent resin,
48-51 parts of poly (acrylic acid-acrylamide) super absorbent resin,
32-34 parts of acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous high water-absorbing resin,
23-26 parts of graphene oxide,
8.5 to 10 parts of carboxyl carbon nano-tubes;
the ratio of monomer units in the macromolecular chain of the poly (acrylic acid-acrylamide) super absorbent resin is acrylic acid: acrylamide = 10: (9.5-12);
the ratio of monomer units in the macromolecular chain of the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous high-hydroscopicity resin is acrylic acid: acrylamide: 2-acrylamide-2-methylpropanesulfonic acid=10: (7.8-8.5): (3.9-4.4);
the graphene oxide is edge graphene oxide; the groups grafted on the single edge of the edge graphene oxide comprise carboxyl, hydroxyl, epoxy and carbonyl, wherein the relative content of the carboxyl is 38.5-41.2%, and the relative content of the hydroxyl is 30.7-31.5%.
Preferably, the absorbent material for the paper diaper is prepared from the following raw materials in parts by weight:
114 parts of polyacrylic acid super absorbent resin,
49 parts of poly (acrylic acid-acrylamide) super absorbent resin,
33 parts of acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin,
24.5 parts of graphene oxide,
And 9.2 parts of carboxyl carbon nano tube.
Preferably, the ratio of monomer units in the macromolecular chain of the poly (acrylic acid-acrylamide) super absorbent resin is acrylic acid: acrylamide = 10:11.
preferably, the ratio of monomer units in the macromolecular chain of the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin is acrylic acid: acrylamide: 2-acrylamide-2-methylpropanesulfonic acid=10: 8.5:4.2.
preferably, the groups grafted on the single edge of the edge graphene oxide comprise carboxyl, hydroxyl, epoxy and carbonyl, wherein the relative content of carboxyl is 39.6% and the relative content of hydroxyl is 30.1%.
Preferably, the graphene oxide is nano graphene oxide; the carboxyl carbon nano-tube is a nano carboxyl carbon nano-tube.
The embodiment also provides a paper diaper, and the absorbent core of the paper diaper is made of the absorbent material for the paper diaper.
Preferably, the diaper is a suspended core omnibearing leakproof diaper, the suspended core omnibearing leakproof diaper comprises a moisture absorption core body and a waterproof layer, the moisture absorption core body comprises a front waistline part, a crotch part and a rear waistline part which are respectively attached to a human body, the outer surface of the front waistline part, the middle of the outer surface of the crotch part and the outer surface of the rear waistline part of the moisture absorption core body are attached to the waterproof layer through hot melt adhesives, moisture absorption grooves are formed between the two sides of the crotch part of the moisture absorption core body and the waterproof layer respectively, a first water-repellent non-woven fabric is attached to the inner surface of the front waistline part, and a second water-repellent non-woven fabric is attached to the inner surface of the rear waistline part.
Preferably, the two side edges of the waterproof layer are provided with a first elastic band and a second elastic band, the first elastic band is bent upwards to form a surrounding edge, the first elastic band is located at the inner side edge of the moisture absorption groove, and the second elastic band is located at the outer side edge of the moisture absorption groove.
Preferably, a third elastic band is transversely arranged between the waterproof layer and the rear waistline part, side waist patches are respectively arranged at two ends of the third elastic band, and a front waist patch matched with the two side waist patches is arranged on the outer surface of the waterproof layer at the front waistline part.
Preferably, a transverse front urine-repellent passage is formed between the first water-repellent nonwoven fabric and the front waistline portion.
Preferably, a transverse rear urine-repellent passage is formed between the second water-repellent nonwoven fabric and the rear waistline portion.
Preferably, the absorbent core has a plurality of absorbent particles distributed therein.
Preferably, the waterproof layer comprises an outermost waterproof nonwoven fabric.
Example 2:
an adsorption material for paper diapers is prepared from the following raw materials in parts by weight:
100 parts of polyacrylic acid super absorbent resin,
45 parts of poly (acrylic acid-acrylamide) super absorbent resin,
30 parts of acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin,
22 parts of graphene oxide,
8 parts of carboxyl carbon nano-tubes;
the ratio of monomer units in the macromolecular chain of the poly (acrylic acid-acrylamide) super absorbent resin is acrylic acid: acrylamide = 10:8.5;
the ratio of monomer units in the macromolecular chain of the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous high-hydroscopicity resin is acrylic acid: acrylamide: 2-acrylamide-2-methylpropanesulfonic acid=10: 9:4.5;
the graphene oxide is edge graphene oxide; the groups grafted on the single edge of the edge graphene oxide comprise carboxyl, hydroxyl, epoxy and carbonyl, wherein the relative content of carboxyl is 37.5%, and the relative content of hydroxyl is 29.2%.
In this embodiment, the preparation method of the absorbent material for a diaper includes the following steps:
A. respectively weighing the polyacrylic acid super absorbent resin, the poly (acrylic acid-acrylamide) super absorbent resin, the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin, the graphene oxide and the carboxyl carbon nano tube according to parts by weight;
B. drying polyacrylic acid super absorbent resin, poly (acrylic acid-acrylamide) super absorbent resin and acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin in vacuum at 55 ℃ until the water content is lower than 8%;
C. mixing the dried polyacrylic acid super absorbent resin, the poly (acrylic acid-acrylamide) super absorbent resin and the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin, adding graphene oxide and carboxyl carbon nano tubes, and sending the mixture into a pulverizer for pulverizing until the particle size is less than 100 microns to obtain a primary mixture;
D. mixing the primary mixture with more than 2000 times of deionized water in parts by weight, stirring for more than 2 hours, and filtering to obtain water-absorbing gel;
E. And freezing the water-absorbing gel through liquid nitrogen, and drying in a freeze dryer until the moisture content is lower than 5%, thereby obtaining the absorbent material for the paper diaper.
In this embodiment, the graphene oxide is nano graphene oxide; the carboxyl carbon nano-tube is a nano carboxyl carbon nano-tube.
Example 3:
an adsorption material for paper diapers is prepared from the following raw materials in parts by weight:
125 parts of polyacrylic acid super absorbent resin,
53 parts of poly (acrylic acid-acrylamide) super absorbent resin,
36 parts of acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin,
27 parts of graphene oxide,
11 parts of carboxyl carbon nano-tubes;
the ratio of monomer units in the macromolecular chain of the poly (acrylic acid-acrylamide) super absorbent resin is acrylic acid: acrylamide = 10:12.5;
the ratio of monomer units in the macromolecular chain of the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous high-hydroscopicity resin is acrylic acid: acrylamide: 2-acrylamide-2-methylpropanesulfonic acid=10: 9:4.5;
the graphene oxide is edge graphene oxide; the groups grafted on the single edge of the edge graphene oxide comprise carboxyl, hydroxyl, epoxy and carbonyl, wherein the relative content of the carboxyl is 41.8%, and the relative content of the hydroxyl is 32.4%.
In this embodiment, the preparation method of the absorbent material for a diaper includes the following steps:
A. respectively weighing the polyacrylic acid super absorbent resin, the poly (acrylic acid-acrylamide) super absorbent resin, the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin, the graphene oxide and the carboxyl carbon nano tube according to parts by weight;
B. drying polyacrylic acid super absorbent resin, poly (acrylic acid-acrylamide) super absorbent resin and acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin in vacuum at 60 ℃ until the water content is lower than 8%;
C. mixing the dried polyacrylic acid super absorbent resin, the poly (acrylic acid-acrylamide) super absorbent resin and the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin, adding graphene oxide and carboxyl carbon nano tubes, and sending the mixture into a pulverizer for pulverizing until the particle size is less than 100 microns to obtain a primary mixture;
D. mixing the primary mixture with more than 2000 times of deionized water in parts by weight, stirring for more than 2 hours, and filtering to obtain water-absorbing gel;
E. And freezing the water-absorbing gel through liquid nitrogen, and drying in a freeze dryer until the moisture content is lower than 5%, thereby obtaining the absorbent material for the paper diaper.
In this embodiment, the graphene oxide is nano graphene oxide; the carboxyl carbon nano-tube is a nano carboxyl carbon nano-tube.
Example 4:
an adsorption material for paper diapers is prepared from the following raw materials in parts by weight:
114 parts of polyacrylic acid super absorbent resin,
49 parts of poly (acrylic acid-acrylamide) super absorbent resin,
33 parts of acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin,
24.5 parts of graphene oxide,
And 9.2 parts of carboxyl carbon nano tube.
In this embodiment, the preparation method of the absorbent material for a diaper includes the following steps:
A. respectively weighing the polyacrylic acid super absorbent resin, the poly (acrylic acid-acrylamide) super absorbent resin, the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin, the graphene oxide and the carboxyl carbon nano tube according to parts by weight;
B. drying polyacrylic acid super absorbent resin, poly (acrylic acid-acrylamide) super absorbent resin and acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin in vacuum at 58 ℃ until the water content is lower than 8%;
C. Mixing the dried polyacrylic acid super absorbent resin, the poly (acrylic acid-acrylamide) super absorbent resin and the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin, adding graphene oxide and carboxyl carbon nano tubes, and sending the mixture into a pulverizer for pulverizing until the particle size is less than 100 microns to obtain a primary mixture;
D. mixing the primary mixture with more than 2000 times of deionized water in parts by weight, stirring for more than 2 hours, and filtering to obtain water-absorbing gel;
E. and freezing the water-absorbing gel through liquid nitrogen, and drying in a freeze dryer until the moisture content is lower than 5%, thereby obtaining the absorbent material for the paper diaper.
In this example, the ratio of monomer units in the macromolecular chain of the poly (acrylic acid-acrylamide) superabsorbent resin is acrylic acid: acrylamide = 10:11.
in this example, the ratio of monomer units in the macromolecular chain of the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous superabsorbent resin is acrylic acid: acrylamide: 2-acrylamide-2-methylpropanesulfonic acid=10: 8.5:4.2.
in this embodiment, the groups grafted on the single edge of the edge graphene oxide include carboxyl, hydroxyl, epoxy and carbonyl, wherein the relative content of carboxyl is 39.6% and the relative content of hydroxyl is 30.1%.
In this embodiment, the graphene oxide is nano graphene oxide; the carboxyl carbon nano-tube is a nano carboxyl carbon nano-tube.
In this embodiment, there is also provided a diaper having an absorbent core made of the absorbent material for a diaper as described above.
As shown in fig. 1-2, the diaper is a suspended core omnibearing leakage-proof diaper, the suspended core omnibearing leakage-proof diaper comprises an absorbent core body 1 and a waterproof layer 2, the absorbent core body 1 comprises a front waistline part 3, a crotch part 4 and a rear waistline part 5 which are respectively attached to a human body, the outer surface of the front waistline part 3, the middle of the outer surface of the crotch part 4 and the outer surface of the rear waistline part 5 of the absorbent core body 1 are attached to the waterproof layer 2 through hot melt adhesives, an absorbent groove 6 is formed between two sides of the crotch part 4 of the absorbent core body 1 and the waterproof layer 2, the height of the absorbent groove 6 is 1-1.5CM, a first water-repellent non-woven fabric 7 is attached to the inner surface of the front waistline part 3, and a second water-repellent non-woven fabric 8 is attached to the inner surface of the rear waistline part 5. Wherein, the hot melt adhesive can be selected from Jiahao 3889 hot melt adhesives.
In this embodiment, the two sides of the waterproof layer 2 are respectively provided with a first elastic band 9 and a second elastic band 10, the first elastic band 9 is bent upwards to form a surrounding edge, the first elastic band 9 is located at the inner side of the moisture absorption groove 6, and the second elastic band 10 is located at the outer side of the moisture absorption groove 6.
In this embodiment, transversely be provided with third elastic band 11 between waterproof layer 2 and the back waistline portion 5, the both ends of third elastic band 11 are provided with the side waist respectively and paste 12, the surface that waterproof layer 2 is located preceding waistline portion 3 departments is provided with and pastes 12 matched with preceding waist subsides 13 with two side waistline, adjusts the panty-shape diapers simpler, guarantees that the panty-shape diapers are laminated with the human body more, improves the baby comfort level.
In this embodiment, a front urine-repellent passage 14 is formed between the first water-repellent nonwoven fabric 7 and the front waistline portion 3, and the front urine-repellent passage has a height of 5mm, and is configured to guide the flow of the absorbent core 1 of the urine web to avoid front leakage of urine.
In this embodiment, a transverse rear urine-repellent channel 15 is formed between the second water-repellent nonwoven fabric 8 and the rear waistline portion 5, the urine-repellent absorbent core 1 of the urine-repellent net flows to avoid rear leakage of urine, and the height of the front urine-repellent channel is 5mm.
In this embodiment, a plurality of absorbent particles are distributed inside the absorbent core 1, so as to increase the absorbent speed of the absorbent core.
In this embodiment, the waterproof layer 2 includes an outermost waterproof nonwoven fabric, and is isolated from dripping.
This all-round leak protection formula panty-shape diapers of suspension core sets up the moisture absorption core 1 into with the preceding waistline portion 3 of human laminating, crotch portion 4 and back waistline portion 5, make the panty-shape diapers laminate human more, crotch portion 4 both sides of moisture absorption core 1 do not laminate with waterproof layer 2, make the crotch portion both sides of moisture absorption core 1 form moisture absorption groove 6 with the waterproof layer respectively, crotch portion 4 both sides lower part of moisture absorption core 1 can be unsettled, when making the urine arrive moisture absorption groove 6, moisture absorption core 1 can absorb moisture from top to bottom simultaneously, increase urine absorption rate, and reject the urine through first water repellent non-woven fabrics 7 and second water repellent non-woven fabrics 8 respectively, reduce the phenomenon emergence of the preceding hourglass of panty-shape diapers and back hourglass.
Comparative example:
the only difference from example 4 is that the absorbent core 1 was a conventional core (commercially available), and the other is the same as example 4.
The paper diaper (samples) and the comparative example (samples) obtained in example 4 of the present invention were selected and subjected to performance test, and the test results are shown in table 1:
TABLE 1
From the table above, it can be seen that: 1. strip mass, absorption capacity, water retention capacity: the two products have no difference. 2. Absorption rate: the pant diaper obtained in example 4, i.e. the absorbent core of the pant diaper was made of absorbent material comprising the pant diaper as described above, absorbed at a rate of 18.86% faster than the comparative example (45.60 vs 54.20). 3. National standard rewet amount: the rewet amount of the diaper obtained in example 4 was lower than that of the ordinary core (3.63 vs 4.55). 4. Laboratory side leakage test: the two are not different. 5. Urine leakage test for product trial: the diaper obtained in example 4 has a lower urine leakage probability (0% vs 3%) than the comparative example. In conclusion, the diaper obtained in the embodiment 4 has low urine leakage probability, lower rewet amount and higher absorption speed compared with the comparative example, can effectively reduce the urine leakage phenomenon in actual use, and improves the use comfort of infants.
+
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that the above-mentioned preferred embodiment should not be construed as limiting the invention, and the scope of the invention should be defined by the appended claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (8)
1. The preparation method of the adsorbing material for the paper diaper is characterized by comprising the following steps of:
A. according to the weight portions, respectively weighing 100 to 125 portions of polyacrylic acid super absorbent resin, 45 to 53 portions of poly (acrylic acid-acrylamide) super absorbent resin, 30 to 36 portions of acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin, 22 to 27 portions of graphene oxide and 8 to 11 portions of carboxyl carbon nano tubes;
the ratio of monomer units in the macromolecular chain of the poly (acrylic acid-acrylamide) super absorbent resin is acrylic acid: acrylamide = 10: (8.5-12.5); the ratio of monomer units in the macromolecular chain of the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous high-hydroscopicity resin is acrylic acid: acrylamide: 2-acrylamide-2-methylpropanesulfonic acid=10: (7-9): (3.5-4.5);
The graphene oxide is nano graphene oxide; the carboxyl carbon nano-tube is a nano carboxyl carbon nano-tube; the graphene oxide is edge graphene oxide; the groups grafted on the single edge of the edge graphene oxide comprise carboxyl, hydroxyl, epoxy and carbonyl, wherein the relative content of the carboxyl is 37.5-41.8%, and the relative content of the hydroxyl is 29.2-32.4%;
B. drying polyacrylic acid super absorbent resin, poly (acrylic acid-acrylamide) super absorbent resin and acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin in vacuum at 55-60 ℃ until the water content is lower than 8%;
C. mixing the dried polyacrylic acid super absorbent resin, the poly (acrylic acid-acrylamide) super absorbent resin and the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin, adding graphene oxide and carboxyl carbon nano tubes, and sending the mixture into a pulverizer for pulverizing until the particle size is less than 100 microns to obtain a primary mixture;
D. mixing the primary mixture with more than 2000 times of deionized water in parts by weight, stirring for more than 2 hours, and filtering to obtain water-absorbing gel;
E. And freezing the water-absorbing gel through liquid nitrogen, and drying in a freeze dryer until the water content is lower than 5%, so that the adsorption material for the paper diaper is obtained, and the graphene oxide and the carboxyl carbon nano tube are absorbed into the inner space of the three-dimensional network structure.
2. The method for producing an absorbent material for a diaper according to claim 1, wherein the absorbent material for a diaper is produced from raw materials comprising, by weight:
105-120 parts of polyacrylic acid super absorbent resin,
48-51 parts of poly (acrylic acid-acrylamide) super absorbent resin,
32-34 parts of acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous high water-absorbing resin,
23-26 parts of graphene oxide,
8.5 to 10 parts of carboxyl carbon nano-tubes;
the ratio of monomer units in the macromolecular chain of the poly (acrylic acid-acrylamide) super absorbent resin is acrylic acid: acrylamide = 10: (9.5-12);
the ratio of monomer units in the macromolecular chain of the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous high-hydroscopicity resin is acrylic acid: acrylamide: 2-acrylamide-2-methylpropanesulfonic acid=10: (7.8-8.5): (3.9-4.4);
The graphene oxide is edge graphene oxide; the groups grafted on the single edge of the edge graphene oxide comprise carboxyl, hydroxyl, epoxy and carbonyl, wherein the relative content of the carboxyl is 38.5-41.2%, and the relative content of the hydroxyl is 30.7-31.5%.
3. The method for producing an absorbent material for a diaper according to claim 1, wherein the absorbent material for a diaper is produced from raw materials comprising, by weight:
114 parts of polyacrylic acid super absorbent resin,
49 parts of poly (acrylic acid-acrylamide) super absorbent resin,
33 parts of acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous super absorbent resin,
24.5 parts of graphene oxide,
And 9.2 parts of carboxyl carbon nano tube.
4. The method for producing an absorbent material for a diaper according to claim 1, wherein the ratio of monomer units in the macromolecular chain of the poly (acrylic acid-acrylamide) super absorbent resin is acrylic acid: acrylamide = 10:11.
5. the method for producing an absorbent material for a diaper according to claim 1, wherein the ratio of monomer units in the macromolecular chain of the acrylic acid/acrylamide/2-acrylamide-2-methylpropanesulfonic acid ternary polymerization porous superabsorbent resin is acrylic acid: acrylamide: 2-acrylamide-2-methylpropanesulfonic acid=10: 8.5:4.2.
6. The method for preparing the absorbent material for paper diapers according to claim 1, wherein the groups grafted on the edges of the single piece of edge graphene oxide comprise carboxyl groups, hydroxyl groups, epoxy groups and carbonyl groups, wherein the relative content of the carboxyl groups is 39.6%, and the relative content of the hydroxyl groups is 30.1%.
7. A diaper characterized in that the absorbent core of the diaper comprises the absorbent material for a diaper manufactured by the manufacturing method according to any one of claims 1 to 6.
8. The pant diaper according to claim 7, wherein the pant diaper is a suspended core omni-directional leakage-proof pant diaper, the suspended core omni-directional leakage-proof pant diaper comprises a moisture-absorbing core and a waterproof layer, the moisture-absorbing core comprises a front waistline portion, a crotch portion and a rear waistline portion which are respectively attached to a human body, the outer surface of the front waistline portion, the middle of the outer surface of the crotch portion and the outer surface of the rear waistline portion of the moisture-absorbing core are attached to the waterproof layer through hot melt adhesives, moisture-absorbing grooves are formed between the two sides of the crotch portion of the moisture-absorbing core and the waterproof layer respectively, a first water-repellent non-woven fabric is attached to the inner surface of the front waistline portion, and a second water-repellent non-woven fabric is attached to the inner surface of the rear waistline portion.
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