CN110240673B - Poplar steam blasting liquid hemicellulose-based hydrogel and preparation method thereof - Google Patents
Poplar steam blasting liquid hemicellulose-based hydrogel and preparation method thereof Download PDFInfo
- Publication number
- CN110240673B CN110240673B CN201910532482.8A CN201910532482A CN110240673B CN 110240673 B CN110240673 B CN 110240673B CN 201910532482 A CN201910532482 A CN 201910532482A CN 110240673 B CN110240673 B CN 110240673B
- Authority
- CN
- China
- Prior art keywords
- poplar
- hemicellulose
- liquid
- steam
- based hydrogel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
- C08J3/075—Macromolecular gels
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Graft Or Block Polymers (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
The invention provides a poplar steam blasting liquid hemicellulose-based hydrogel and a preparation method thereof. According to the wood steam blasting liquid hemicellulose-based hydrogel and the preparation method thereof, the hydrogel takes the hemicellulose in the poplar steam blasting liquid as a main body, the initial preparation material is wide in source and strong in environmental protection, the preparation method of the hydrogel is simple and strong in practicability, and the obtained hydrogel is excellent in water retention performance.
Description
Technical Field
The invention belongs to the technical field of hydrogel preparation, and particularly relates to a poplar steam blasting liquid hemicellulose-based hydrogel and a preparation method thereof.
Background
The hydrogel is a hydrophilic reticular polymer swelling body which can swell in water, absorb and retain a large amount of water and can not dissolve in water, the main chain or the side chain of the hydrogel is provided with hydrophilic groups, and after swelling, part of water can form hydrogen bonds with the hydrophilic groups, so that a large amount of water is retained. Due to the functional characteristics of water retention, thickening and the like, the hydrogel is widely applied in various industries in recent years.
The acquisition and preparation of hydrogels, from the material source, are mainly divided into two main categories: one is synthetic hydrogel based on petroleum source, such as polyacrylic acid and its ester hydrogel, polyvinyl alcohol hydrogel, etc., and the patent with publication number CN106554454A, patent name as a preparation method and application of polyacrylic acid hydrogel adsorption material discloses a preparation method of polyacrylic acid hydrogel, but the initial preparation material of the hydrogel is non-renewable energy source and has poor environmental protection performance; secondly, the method uses natural high molecules as main bodies or non-synthetic hydrogel of starting materials, such as starch-based hydrogel, cellulose-based hydrogel and the like belonging to polysaccharides, the manufacturing of the hydrogel is basically environment-friendly and degradable on the starting preparation materials, the raw material sources are wide and renewable, and the like, the publication number is CN105504315B, the patent name is a preparation method of straw full-component hydrogel and the patent of the application thereof discloses a method for preparing hydrogel by using straws as the starting materials, but the method uses a chemical method to pretreat the straws so as to break fibers in the straws and destroy the wrapping of hemicellulose and lignin on cellulose, and the method has poor treatment effect, high energy consumption, complex method and poor practicability; in addition, the hydrogel mainly made of natural polymers in the prior art has poor water retention performance, which hinders the application of the hydrogel.
Disclosure of Invention
The invention aims to solve the technical problem of providing a poplar steam blasting liquid hemicellulose-based hydrogel and a preparation method thereof.
In order to solve the problems, the invention provides a poplar steam blasting liquid hemicellulose-based hydrogel, wherein the poplar steam blasting liquid hemicellulose-based hydrogel is a three-dimensional network structure polymer formed by graft copolymerization of hemicellulose in poplar steam blasting liquid, acrylamide and acrylic acid, and the poplar steam blasting liquid is obtained by steam blasting of poplar.
The poplar steam blasting liquid is characterized in that poplar is treated under high-temperature high-pressure steam to partially degrade hemicellulose in the poplar, part of lignin is softened and degraded, chemical components of the wood fiber raw material are partially separated and structurally changed in the instant decompression emptying process, and the decomposition of the wood fiber structural components is carried out under the combined action of heat energy in the form of steam, shearing force caused by steam expansion and hydrolysis of glycosidic bonds. The products of the poplar after steam explosion are mainly steam explosion liquid and fibrous solid products, the components in the steam explosion liquid are complex, the steam explosion liquid mainly contains hemicellulose-based polysaccharide and monosaccharide, acrylamide monomers and acrylic acid monomers with hydrophilic groups are grafted on the hemicellulose in the poplar steam explosion liquid, and the hydrogel obtained after polymerization and crosslinking has good swelling rate; and moreover, the poplar steam blasting liquid is used as a hemicellulose source, the poplar steam blasting liquid is wide in source, renewable, environment-friendly and degradable, and compared with the method for obtaining the hemicellulose by chemically treating and physically treating the poplar, the method for obtaining the hemicellulose by treating the poplar through steam blasting has the advantages of short treatment time, good treatment effect, low energy consumption, no use of chemical reagents and little environmental pollution, the steam blasting liquid does not need to be continuously separated, the steam blasting liquid containing various hemicelluloses is directly used for graft copolymerization with hydrophilic monomers, and the preparation process of the hydrogel is simpler and more practical.
In the technical scheme, the preferable mass ratio of the hemicellulose to the acrylamide to the acrylic acid is 1 (1-5) to 1-10. More preferably, the mass ratio of the hemicellulose to the acrylamide to the acrylic acid is 1 (1-2) to (1-4).
In the technical scheme, preferably, the raw materials for preparing the poplar steam explosion liquid hemicellulose-based hydrogel also comprise an initiator and a cross-linking agent, wherein the mass ratio of the initiator to acrylamide is 1 (2-10); more preferably, the mass ratio of the initiator to the acrylamide is 1 (3-5). The mass ratio of the cross-linking agent to the acrylamide is 1 (10-60), and the mass ratio of the cross-linking agent to the acrylamide is more preferably 1 (25-40). The poplar steam blasting liquid, acrylamide monomer and acrylic acid monomer are subjected to graft copolymerization and crosslinking reaction under the action of an initiator and a crosslinking agent to obtain the polymer with a three-dimensional network structure.
In the technical scheme, preferably, the initiator is one or the combination of two of ammonium persulfate and sodium sulfite; further preferably, the initiator is a mixture of ammonium persulfate and sodium sulfite; more preferably, the initiator is ammonium persulfate and sodium sulfite in a ratio of 1:2 in mass ratio.
In the technical scheme, the cross-linking agent is preferably N, N-methylene bisacrylamide.
The invention also aims to provide a method for preparing the poplar steam explosion liquid hemicellulose-based hydrogel, which comprises the following steps:
s1, performing steam explosion treatment on the poplar, and filtering the obtained product to obtain poplar steam explosion liquid;
s2, mixing the poplar steam blasting liquid obtained in the step S1 with acrylamide, acrylic acid, an initiator and a cross-linking agent, and performing graft copolymerization and cross-linking reaction to obtain a three-dimensional network structure polymer;
s3, standing the three-dimensional network structure polymer obtained in the step S2 at a constant temperature to obtain the poplar steam blasting liquid hemicellulose-based hydrogel.
The poplar steam blasting liquid contains rich pentosan and a small amount of glucan, hydroxyl free radicals can be generated after an initiator is added, so that the hydroxyl free radicals can perform a grafting reaction with monomer acrylamide and acrylic acid, hydrophilic groups of amide groups and carboxyl groups are introduced, the hydrophilicity of the hydrogel is increased, a cross-linking agent is added, the hydrogel can be promoted to form a network structure with copolymerization cross-linking, and the network structure with copolymerization cross-linking is subjected to standing and water absorption to obtain the poplar steam blasting liquid hemicellulose-based hydrogel. Ammonium persulfate and sodium sulfite are used as initiators of a redox system, and free radicals are generated by redox reaction.
In the technical scheme, preferably, in step S1, before the steam explosion treatment is performed on the poplar, the poplar is further subjected to rehydration balance treatment, and the moisture content is controlled at 35%; more preferably, the rehydration balance treatment of the poplar is specifically to balance the moisture of the poplar in a sealed bag filled with distilled water, control the moisture to be about 35% and balance for 48 hours.
In the technical solution, preferably, in step S1, the processing conditions for performing the steam explosion treatment on the poplar wood are as follows: the steam explosion temperature is 201-.
In the technical solution, preferably, the step S1 further includes processing the obtained poplar steam explosion liquid in a step S1a, where the step S1a is: and (3) carrying out rotary steaming on the poplar steam blasting liquid at the temperature of 40-55 ℃ to obtain the poplar steam blasting liquid concentrated solution.
In the technical solution, preferably, the step S1 further includes processing the concentrated solution of steam explosion of poplar through step S1b after step S1a, and step S1b is: preheating poplar steam explosion liquid concentrated solution for 5-15min at 40-60 ℃, and stirring at the stirring speed of 100-300 r/min.
In the technical solution, preferably, step S2 specifically includes:
s21, adding an initiator into the poplar steam blasting liquid, and stirring for 5-15 min;
s22, adding acrylamide into the reaction liquid obtained in the step S21, and stirring for 5-15 min;
s23, adding acrylic acid into the reaction liquid obtained in the step S22, and stirring for 5-15 min;
s24, adding a cross-linking agent into the reaction liquid obtained in the step S23, and stirring to obtain the polymer with the three-dimensional network structure.
In the technical solution, preferably, step S3 specifically includes: and (3) placing the three-dimensional network structure polymer reaction system in a constant temperature environment of 25 ℃, and standing for 24 hours to obtain the poplar steam blasting liquid hemicellulose-based hydrogel.
In the technical solution, preferably, after the step S3, the step S4 is further performed: and treating unreacted reagents in the hemicellulose-based hydrogel of the poplar steam blasting liquid by using NaOH, and then treating the NaOH on the surface of the hemicellulose-based hydrogel of the poplar steam blasting liquid by using deionized water.
Compared with the prior art, the invention has the following beneficial effects:
1. the poplar steam blasting liquid hemicellulose-based hydrogel takes hemicellulose-based polysaccharide and monosaccharide in poplar steam blasting liquid as main chains, acrylamide monomers and acrylic acid monomers with hydrophilic groups are grafted on the hemicellulose, and the hemicellulose-based polysaccharide and the monosaccharide are polymerized and crosslinked to form a three-dimensional network structure polymer; moreover, the poplar steam blasting liquid is used as a hemicellulose source, the poplar steam blasting liquid is wide in source, renewable, environment-friendly and degradable, and compared with the method for obtaining the hemicellulose by chemically treating and physically treating the poplar, the method for obtaining the hemicellulose by treating the poplar through steam blasting has the advantages of good treatment effect, low energy consumption and small environmental pollution, the steam blasting liquid does not need to be continuously separated, the steam blasting liquid containing various hemicelluloses is directly used for graft copolymerization with hydrophilic monomers, and the preparation process of the hydrogel is simpler and more practical;
2. according to the poplar steam explosion liquid hemicellulose-based hydrogel and the preparation method thereof, the poplar steam explosion liquid hemicellulose-based hydrogel with excellent swelling performance and water retention performance is obtained by regulating and controlling poplar steam explosion process conditions, the contents of added initiators of ammonium persulfate and anhydrous sodium sulfite, monomer acrylamide, acrylic acid and a cross-linking agent of N, N-methylene bisacrylamide, and the graft copolymerization and cross-linking reaction time, wherein the swelling rate is 286.6g/g, and the water retention value is 60.3% after the poplar steam explosion liquid hemicellulose-based hydrogel is placed in an environment at 20 ℃ for 180 hours;
3. the invention relates to a preparation method of a poplar steam explosion liquid hemicellulose-based hydrogel, which adopts a steam explosion method to pretreat poplar, and pretreat wood fiber raw materials in a short reaction time by high temperature and high pressure generated by saturated steam, thereby greatly reducing the pretreatment time of the poplar and improving the pretreatment efficiency.
Drawings
FIG. 1 is a flow chart of a method for preparing a hemicellulose-based hydrogel by using poplar steam explosion liquid according to the invention;
FIG. 2 is a photograph of a hemicellulose-based hydrogel of steam explosion liquid of poplar obtained in example 1 of the present invention;
fig. 3 is a scanning electron microscope image of the hemicellulose-based hydrogel of the poplar steam explosion liquid obtained in example 1 of the present invention: a. before swelling; b. after swelling.
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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 poplar steam explosion liquid hemicellulose-based hydrogel is a three-dimensional network structure polymer formed by graft copolymerization of hemicellulose in poplar steam explosion liquid, acrylamide and acrylic acid, and the mass ratio of the hemicellulose, the acrylamide and the acrylic acid in raw materials is 1:1.3: 3.6.
The preparation method of the poplar steam explosion liquid hemicellulose-based hydrogel comprises the following specific steps:
s1, immersing poplar into a sealed bag with distilled water for rehydration balance, controlling the water content to be about 35%, placing the poplar in a refrigerator with the temperature of 6 ℃, and balancing for 48 hours; putting the poplar chips after rehydration balance into a high-pressure reaction kettle, introducing steam into the high-pressure reaction kettle to raise the temperature to 209 ℃, preserving heat, maintaining the pressure for 7min, quickly reducing the pressure after maintaining the pressure and preserving the heat, performing blasting treatment on the poplar chips, collecting the poplar blasting liquid after steam blasting treatment after blasting is finished, filtering, and taking filtrate to obtain poplar steam blasting liquid; carrying out rotary steaming on the poplar steam blasting liquid at 40 ℃ to obtain poplar steam blasting liquid concentrated solution, wherein the mass concentration of hemicellulose in the poplar steam blasting liquid concentrated solution is about 5%; preheating poplar steam explosion liquid concentrated solution at 40 ℃ for 10min, and continuously stirring at the stirring speed of 200 r/min;
s2, taking 10g of poplar steam blasting liquid concentrated solution into a beaker, adding 0.14g of initiator into the beaker to perform redox reaction, and generating free radicals through full reaction, wherein the initiator is ammonium persulfate and anhydrous sodium sulfite according to a mass ratio of 1:2, adding 0.65g of monomer acrylamide after 15min, continuously stirring for 15min, adding 1.8g of monomer acrylic acid, grafting the monomer acrylamide and the monomer acrylic acid to a hemicellulose chain, adding 0.019g of cross-linking agent N, N-methylene bisacrylamide after 15min intervals, and promoting the monomer acrylamide and the monomer acrylic acid to form a three-dimensional network structure polymer;
s3, after reacting for a certain time, standing the reaction product for 24 hours in a constant-temperature 25 ℃ environment, and taking out the formed poplar steam blasting liquid hemicellulose-based hydrogel;
s4, placing the formed poplar steam explosion liquid hemicellulose-based hydrogel into a culture dish containing 1mol/L NaOH to be soaked for 24 hours, and removing unreacted reagents; and then placing the poplar steam blasting liquid hemicellulose-based hydrogel in deionized water to remove NaOH on the surface of the gel, and finally drying the poplar steam blasting liquid hemicellulose-based hydrogel at 60 ℃.
The swelling rate of the obtained poplar steam explosion liquid hemicellulose-based hydrogel is measured, the swelling rate is 286.6g/g, and the water retention value is 60.3% after 180 hours.
Fig. 1 is a flow chart of a method for preparing a hemicellulose-based hydrogel by using poplar steam explosion liquid according to the invention; FIG. 2 is a photograph of the hemicellulose-based hydrogel of the steam explosion liquid of poplar obtained in this example; fig. 3 a is a scanning electron microscope image of the poplar steam blasting liquid hemicellulose-based hydrogel obtained in the embodiment before swelling, and b is a scanning electron microscope image of the poplar steam blasting liquid hemicellulose-based hydrogel obtained in the embodiment after swelling, which shows that the sample obtained in the embodiment has a three-dimensional network structure, and the three-dimensional network structure is filled with water after swelling, so that the network structure expands.
Example 2
The poplar steam explosion liquid hemicellulose-based hydrogel is a three-dimensional network structure polymer formed by graft copolymerization of hemicellulose in poplar steam explosion liquid, acrylamide and acrylic acid, and the mass ratio of the hemicellulose, the acrylamide and the acrylic acid in raw materials is 1:1.4: 3.
The preparation method of the poplar steam explosion liquid hemicellulose-based hydrogel comprises the following specific steps:
s1, immersing poplar into a sealed bag with distilled water for rehydration balance, controlling the water content to be about 35%, placing the poplar in a refrigerator with the temperature of 6 ℃, and balancing for 48 hours; putting the poplar chips after rehydration balance into a high-pressure reaction kettle, introducing steam into the high-pressure reaction kettle to raise the temperature to 209 ℃, preserving heat, maintaining the pressure for 7min, quickly reducing the pressure after maintaining the pressure and preserving the heat, performing blasting treatment on the poplar chips, collecting the poplar blasting liquid after steam blasting treatment after blasting is finished, filtering, and taking filtrate to obtain poplar steam blasting liquid; carrying out rotary steaming on the poplar steam blasting liquid at 50 ℃ to obtain poplar steam blasting liquid concentrated solution, wherein the mass concentration of hemicellulose in the poplar steam blasting liquid concentrated solution is about 5%; preheating poplar steam explosion liquid concentrated solution at 50 ℃ for 10min, and continuously stirring at the stirring speed of 100 r/min;
s2, taking 10g of poplar steam blasting liquid concentrated solution into a beaker, adding 0.14g of initiator into the beaker to perform redox reaction, and generating free radicals through full reaction, wherein the initiator is ammonium persulfate and anhydrous sodium sulfite according to a mass ratio of 1:2, adding 0.7g of monomer acrylamide after 15min, continuously stirring for 15min, adding 1.5g of monomer acrylic acid, grafting the monomer acrylamide and the acrylic acid onto a hemicellulose chain, adding 0.018g of cross-linking agent N, N-methylene bisacrylamide after 15min intervals, and promoting the mixture to form a three-dimensional network structure polymer;
s3, after reacting for a certain time, standing the reaction product for 24 hours in a constant-temperature 25 ℃ environment, and taking out the formed poplar steam blasting liquid hemicellulose-based hydrogel;
s4, placing the formed poplar steam explosion liquid hemicellulose-based hydrogel into a culture dish containing 1mol/L NaOH to be soaked for 24 hours, and removing unreacted reagents; and then placing the poplar steam blasting liquid hemicellulose-based hydrogel in deionized water to remove NaOH on the surface of the gel, and finally drying the poplar steam blasting liquid hemicellulose-based hydrogel at 60 ℃.
And measuring the swelling rate of the obtained poplar steam blasting liquid hemicellulose-based hydrogel, and measuring that the swelling rate is 215.7 g/g.
Example 3
The poplar steam explosion liquid hemicellulose-based hydrogel is a three-dimensional network structure polymer formed by graft copolymerization of hemicellulose in poplar steam explosion liquid, acrylamide and acrylic acid, and the mass ratio of the hemicellulose, the acrylamide and the acrylic acid in raw materials is 1:1: 4.
The preparation method of the poplar steam explosion liquid hemicellulose-based hydrogel comprises the following specific steps:
s1, immersing poplar into a sealed bag with distilled water for rehydration balance, controlling the water content to be about 35%, placing the poplar in a refrigerator with the temperature of 6 ℃, and balancing for 48 hours; putting the poplar chips after rehydration balance into a high-pressure reaction kettle, introducing steam into the high-pressure reaction kettle to raise the temperature to 209 ℃, preserving heat, maintaining the pressure for 7min, quickly reducing the pressure after maintaining the pressure and preserving the heat, performing blasting treatment on the poplar chips, collecting the poplar blasting liquid after steam blasting treatment after blasting is finished, filtering, and taking filtrate to obtain poplar steam blasting liquid; carrying out rotary steaming on the poplar steam blasting liquid at 55 ℃ to obtain poplar steam blasting liquid concentrated solution, wherein the mass concentration of hemicellulose in the poplar steam blasting liquid concentrated solution is about 5%; preheating poplar steam explosion liquid concentrated solution at 60 ℃ for 10min, and continuously stirring at the stirring speed of 300 r/min;
s2, taking 10g of poplar steam blasting liquid concentrated solution into a beaker, adding 0.14g of initiator into the beaker to perform redox reaction, and generating free radicals through full reaction, wherein the initiator is ammonium persulfate and anhydrous sodium sulfite according to a mass ratio of 1:2, adding 0.5g of monomer acrylamide after 15min, continuously stirring for 15min, adding 2.0g of monomer acrylic acid, grafting the monomer acrylamide and the acrylic acid onto a hemicellulose chain, adding 0.018g of cross-linking agent N, N-methylene bisacrylamide after 15min intervals, and promoting the monomer acrylamide and the acrylic acid to form a three-dimensional network structure polymer;
s3, after reacting for a certain time, standing the reaction product for 24 hours in a constant-temperature 25 ℃ environment, and taking out the formed poplar steam blasting liquid hemicellulose-based hydrogel;
s4, placing the formed poplar steam explosion liquid hemicellulose-based hydrogel into a culture dish containing 1mol/L NaOH to be soaked for 24 hours, and removing unreacted reagents; and then placing the poplar steam blasting liquid hemicellulose-based hydrogel in deionized water to remove NaOH on the surface of the gel, and finally drying the poplar steam blasting liquid hemicellulose-based hydrogel at 60 ℃.
And measuring the swelling rate of the obtained poplar steam blasting liquid hemicellulose-based hydrogel, and measuring that the swelling rate is 219 g/g.
Example 4
The poplar steam explosion liquid hemicellulose-based hydrogel is a three-dimensional network structure polymer formed by graft copolymerization of hemicellulose in poplar steam explosion liquid, acrylamide and acrylic acid, and the mass ratio of the hemicellulose, the acrylamide and the acrylic acid in raw materials is 1:2: 4.
The specific process conditions, the amounts of the cross-linking agent and the initiator, and other conditions of the preparation method of the poplar steam explosion liquid hemicellulose-based hydrogel in this embodiment are the same as those in embodiment 1.
Example 5
The poplar steam explosion liquid hemicellulose-based hydrogel is a three-dimensional network structure polymer formed by graft copolymerization of hemicellulose in poplar steam explosion liquid, acrylamide and acrylic acid, and the mass ratio of the hemicellulose, the acrylamide and the acrylic acid in raw materials is 1:5: 10.
The specific process conditions, the amounts of the cross-linking agent and the initiator, and other conditions of the preparation method of the poplar steam explosion liquid hemicellulose-based hydrogel in this embodiment are the same as those in embodiment 1.
Example 6
The hemicellulose-based hydrogel of the poplar steam explosion liquid in this example is a three-dimensional network structure polymer formed by graft copolymerization of hemicellulose in the poplar steam explosion liquid, acrylamide and acrylic acid, and the mass ratio, the crosslinking agent and the preparation process conditions of the hemicellulose, the acrylamide and the acrylic acid in the raw materials are the same as those in example 1, except that the amount of the initiator in the raw materials prepared in this example is 0.217 g.
Example 7
The hemicellulose-based hydrogel of the poplar steam explosion liquid in this embodiment is a three-dimensional network structure polymer formed by graft copolymerization of hemicellulose in the poplar steam explosion liquid, acrylamide and acrylic acid, and the mass ratio, the crosslinking agent and the preparation process conditions of the hemicellulose, the acrylamide and the acrylic acid in the raw materials are the same as those in embodiment 1, except that the amount of the initiator in the raw materials prepared in this embodiment is 0.325 g.
Example 8
The poplar steam explosion liquid hemicellulose-based hydrogel described in this embodiment is a three-dimensional network structure polymer formed by graft copolymerization of hemicellulose in poplar steam explosion liquid, acrylamide and acrylic acid, and the mass ratio, the cross-linking agent and the preparation process conditions of the hemicellulose, the acrylamide and the acrylic acid in the raw materials are the same as those in embodiment 1, except that the amount of the initiator in the raw materials prepared in this embodiment is 0.065 g.
Example 9
The hemicellulose-based hydrogel of the poplar steam explosion liquid in this example is a three-dimensional network structure polymer formed by graft copolymerization of hemicellulose in the poplar steam explosion liquid, acrylamide and acrylic acid, and the mass ratio, the initiator and the preparation process conditions of the hemicellulose, the acrylamide and the acrylic acid in the raw materials are the same as those in example 1, except that the amount of the cross-linking agent in the raw materials prepared in this example is 0.026 g.
Example 10
The poplar steam explosion liquid hemicellulose-based hydrogel described in this embodiment is a three-dimensional network structure polymer formed by graft copolymerization of hemicellulose in poplar steam explosion liquid, acrylamide and acrylic acid, and the mass ratio, initiator and preparation process conditions of the hemicellulose, the acrylamide and the acrylic acid in the raw materials are the same as those in embodiment 1, except that the amount of the cross-linking agent in the raw materials prepared in this embodiment is 0.016 g.
Example 11
The poplar steam explosion liquid hemicellulose-based hydrogel described in this example is a three-dimensional network structure polymer formed by graft copolymerization of hemicellulose in poplar steam explosion liquid, acrylamide and acrylic acid, and the mass ratio, initiator and preparation process conditions of the hemicellulose, the acrylamide and the acrylic acid in the raw materials are the same as those in example 1, except that the amount of the cross-linking agent in the raw materials prepared in this example is 0.065 g.
Example 12
The poplar steam explosion liquid hemicellulose-based hydrogel described in this embodiment is a three-dimensional network structure polymer formed by graft copolymerization of hemicellulose in poplar steam explosion liquid, acrylamide and acrylic acid, and the mass ratio, the crosslinking agent and the preparation process conditions of the hemicellulose, the acrylamide and the acrylic acid in the raw materials are the same as those in embodiment 1, except that the amount of the initiator used in the raw materials prepared in this embodiment is 0.011 g.
Table 1 is a table of preparation conditions and swelling rate data of poplar steam explosion liquid hemicellulose-based hydrogel obtained in 9 examples, and the data in table 1 can be obtained, the mass ratios of poplar steam explosion liquid, acrylamide, acrylic acid, initiator and cross-linking agent in the preparation process are different, the swelling rates of the obtained poplar steam explosion liquid hemicellulose-based hydrogel are different, the preferred mass ratio of hemicellulose, acrylamide and acrylic acid in the raw materials is 1 (1-2) to (1-4), and the unexpected best swelling rate is obtained when the mass ratio is 1:1.3:3.6, and the initiator is preferably used in the raw materials: the mass ratio of acrylamide is 1 (3-5), and the ratio of the initiator: the acrylamide has unexpected optimal swelling rate at the mass ratio of 1: 4.64; the amount of cross-linking agent used is preferably cross-linking agent: the mass ratio of acrylamide is 1 (25-40), and the mass ratio of the cross-linking agent: the acrylamide mass ratio of 1:34.21 has an unexpected best swelling ratio.
TABLE 1
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (6)
1. A method for preparing a poplar steam explosion liquid hemicellulose-based hydrogel is characterized by comprising the following steps:
the poplar steam blasting liquid hemicellulose-based hydrogel comprises a three-dimensional network structure polymer formed by graft copolymerization of hemicellulose in poplar steam blasting liquid, acrylamide and acrylic acid, wherein the poplar steam blasting liquid is obtained by steam blasting of poplar; the mass ratio of the hemicellulose to the acrylamide to the acrylic acid is 1 (1-5) to 1-10; the raw materials for preparing the poplar steam blasting liquid hemicellulose-based hydrogel also comprise an initiator and a cross-linking agent, wherein the mass ratio of the initiator to acrylamide is 1 (2-10); the mass ratio of the cross-linking agent to the acrylamide is 1 (10-60);
the method for preparing the poplar steam blasting liquid hemicellulose-based hydrogel comprises the following steps of:
s1, performing steam explosion treatment on the poplar, and filtering the obtained product to obtain poplar steam explosion liquid, wherein the treatment conditions are as follows: the steam explosion temperature is 201-;
s2, mixing the poplar steam blasting liquid obtained in the step S1 with acrylamide, acrylic acid, an initiator and a cross-linking agent, and performing graft copolymerization and cross-linking reaction to obtain a three-dimensional network structure polymer;
s3, standing the three-dimensional network structure polymer obtained in the step S2 at a constant temperature to obtain the poplar steam blasting liquid hemicellulose-based hydrogel.
2. The method for preparing the hemicellulose-based hydrogel by using poplar steam explosion liquid according to claim 1, wherein the method comprises the following steps: the initiator is the combination of ammonium persulfate and sodium sulfite.
3. The method for preparing the hemicellulose-based hydrogel by using poplar steam explosion liquid according to claim 1, wherein the method comprises the following steps: the cross-linking agent is N, N-methylene bisacrylamide.
4. The method for preparing hemicellulose-based hydrogel by using poplar steam explosion liquid as claimed in claim 1, wherein step S1 further comprises processing the obtained poplar steam explosion liquid by step S1a, and step S1a is as follows: and (3) carrying out rotary steaming on the poplar steam blasting liquid at the temperature of 40-55 ℃ to obtain the poplar steam blasting liquid concentrated solution.
5. The method for preparing hemicellulose-based hydrogel of poplar steam explosion liquid according to claim 4, wherein step S1 further comprises treating the poplar steam explosion liquid concentrate after step S1a by step S1b, wherein step S1b is as follows: preheating the poplar steam explosion liquid concentrated solution at 40-60 ℃ for 5-15min, and stirring at the stirring speed of 100-300 r/min.
6. The method for preparing the hemicellulose-based hydrogel by using poplar steam explosion liquid according to claim 1, wherein the step S2 specifically comprises the following steps:
s21, adding the initiator into the poplar steam blasting liquid, and stirring for 5-15 min;
s22, adding acrylamide into the reaction liquid obtained in the step S21, and stirring for 5-15 min;
s23, adding acrylic acid into the reaction liquid obtained in the step S22, and stirring for 5-15 min;
s24, adding the cross-linking agent into the reaction liquid obtained in the step S23, and stirring to obtain the three-dimensional network structure polymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910532482.8A CN110240673B (en) | 2019-06-19 | 2019-06-19 | Poplar steam blasting liquid hemicellulose-based hydrogel and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910532482.8A CN110240673B (en) | 2019-06-19 | 2019-06-19 | Poplar steam blasting liquid hemicellulose-based hydrogel and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110240673A CN110240673A (en) | 2019-09-17 |
| CN110240673B true CN110240673B (en) | 2022-03-22 |
Family
ID=67888145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910532482.8A Active CN110240673B (en) | 2019-06-19 | 2019-06-19 | Poplar steam blasting liquid hemicellulose-based hydrogel and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110240673B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226030A (en) * | 2011-05-25 | 2011-10-26 | 无锡凯恩科特再生能源科技有限公司 | Preparation method of crop straw based high power water absorbent |
| CN105131185A (en) * | 2015-09-17 | 2015-12-09 | 华南理工大学 | Pineapple waste hemicellulose based pH sensitive type porous hydrogel as well as preparation method and application thereof |
| CN107759735A (en) * | 2016-08-22 | 2018-03-06 | 华南理工大学 | A kind of water-insoluble hemicellulose grafted polyacrylamide and its preparation and application |
| CN108373513A (en) * | 2018-02-24 | 2018-08-07 | 天津科技大学 | A kind of method of the steam and nitrogen collaboration gas explosion separation hemicellulose of poplar |
| CN108676121A (en) * | 2018-04-16 | 2018-10-19 | 中国林业科学研究院亚热带林业研究所 | A kind of magnetism hemicellulose based aquagel |
-
2019
- 2019-06-19 CN CN201910532482.8A patent/CN110240673B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226030A (en) * | 2011-05-25 | 2011-10-26 | 无锡凯恩科特再生能源科技有限公司 | Preparation method of crop straw based high power water absorbent |
| CN105131185A (en) * | 2015-09-17 | 2015-12-09 | 华南理工大学 | Pineapple waste hemicellulose based pH sensitive type porous hydrogel as well as preparation method and application thereof |
| CN107759735A (en) * | 2016-08-22 | 2018-03-06 | 华南理工大学 | A kind of water-insoluble hemicellulose grafted polyacrylamide and its preparation and application |
| CN108373513A (en) * | 2018-02-24 | 2018-08-07 | 天津科技大学 | A kind of method of the steam and nitrogen collaboration gas explosion separation hemicellulose of poplar |
| CN108676121A (en) * | 2018-04-16 | 2018-10-19 | 中国林业科学研究院亚热带林业研究所 | A kind of magnetism hemicellulose based aquagel |
Non-Patent Citations (3)
| Title |
|---|
| pH敏感型半纤维素水凝胶的制备及释药性能研究;叶青等;《现代化工》;20120531;第32卷(第5期);第62-66页 * |
| 半纤维素基水凝胶制备方法研究进展;程合丽等;《造纸科学与技术》;20151231;第34卷(第6期);第40-45页 * |
| 杨木中半纤维素的提取分离及其初步应用;孙倩玉;《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》;20190515;B016-318 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110240673A (en) | 2019-09-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110270317B (en) | Preparation method of cellulose-based hydrogel adsorbent for heavy metal wastewater treatment | |
| CA1075233A (en) | Highly absorbent modified polysaccharides | |
| Nada et al. | Synthesis and characterization of grafted cellulose for use in water and metal ions sorption | |
| Adel et al. | Carboxymethylated cellulose hydrogel; sorption behavior and characterization | |
| Wang et al. | Preparation and characterization of lignin-acrylamide copolymer as a paper strength additive | |
| CN110028682B (en) | Method for preparing cellulose-based hydrogel by pretreating bagasse bleaching pulp through mechanical ball milling | |
| CN105924596A (en) | Method for preparing silk-fibroin-based water-absorbing material by grafting vinyl monomer | |
| CN110655744B (en) | Preparation method of nano-cellulose/borax/polyvinyl alcohol self-healing hydrogel | |
| Du et al. | Tough and multi-responsive hydrogel based on the hemicellulose from the spent liquor of viscose process | |
| US3553306A (en) | Films and filaments having ion-exchange properties and process for making same | |
| CN112500530A (en) | Calcium carbonate/bagasse cellulose-based super absorbent resin and preparation method thereof | |
| CN108976440B (en) | Method for preparing hydrogel from bagasse hemicellulose | |
| Ren et al. | Preparation of sugarcane bagasse/poly (acrylic acid-co-acrylamide) hydrogels and their application | |
| Khullar et al. | Grafting of acrylonitrile onto cellulosic material derived from bamboo (Dendrocalamus strictus) | |
| Zhu et al. | Introduction of 3‐(trimethylammonium chloride)‐2‐hydroxypropyls onto starch chains for improving the grafting efficiency and sizing property of starch‐g‐poly (acrylic acid) | |
| CN110746785A (en) | High-strength anti-freezing three-dimensional porous hydrogel adsorption material and preparation method thereof | |
| Setyaningsih et al. | Cellulose extracted from water hyacinth and the application in hydrogel | |
| CN108715765B (en) | Method for preparing hemicellulose-based water-retaining agent by using hemicellulose emulsion through microchannel reaction device | |
| CN110240673B (en) | Poplar steam blasting liquid hemicellulose-based hydrogel and preparation method thereof | |
| CN106732423A (en) | A kind of preparation and application of hydroxyethyl cellulose/concave convex rod/sodium humate composite aquogel | |
| CN105131308B (en) | The method that a kind of laccase/tert-butyl hydroperoxide catalysis prepares wooden hydrogel | |
| CN114085629A (en) | Adhesive and preparation method and application thereof | |
| CN113480694A (en) | Enzyme catalysis graft modified cotton pulp cellulose and method for preparing regenerated bioplastic by using same | |
| CN116854867A (en) | Hydrophobic association type hyperbranched papermaking wet strength agent and preparation method thereof | |
| US4075028A (en) | Composition for treating cellulose-containing fibrous materials and method of producing composition for treating cellulose-containing materials |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |