CN110240673A - A kind of poplar steam blasting liquid hemicellulose based aquagel and preparation method thereof - Google Patents
A kind of poplar steam blasting liquid hemicellulose based aquagel and preparation method thereof Download PDFInfo
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Abstract
The present invention provides a kind of poplar steam blasting liquid hemicellulose based aquagel and preparation method thereof, poplar steam blasting liquid hemicellulose based aquagel is the three-dimensional net structure polymer formed by the hemicellulose in poplar steam blasting liquid with acrylamide and acrylic graft copolymer, and poplar steam blasting liquid is that poplar obtains after steam blasting.The wood steam blasting liquid hemicellulose based aquagel and preparation method thereof, for hydrogel based on the hemicellulose in poplar steam blasting liquid, it is extensive that starting prepares material source, the feature of environmental protection is strong, the preparation method of hydrogel is simple, practical, and the hydrogel water retention property obtained is excellent.
Description
Technical field
The invention belongs to hydrogel preparation technical fields, and in particular to a kind of poplar steam blasting liquid hemicellulose group water-setting
Glue and preparation method thereof.
Background technique
Hydrogel be it is a kind of can be swollen in water, absorb and keep large quantity of moisture, and the hydrophily net of water will not be dissolved in
Shape macromolecule swelling body has hydrophilic radical on main chain or side chain, and a part of water can be with these hydrophilic radical shapes after swelling
At hydrogen bond, large quantity of moisture is kept therefrom.Due to functional characteristics such as its water conservation, thickenings, hydrogel is obtained in all trades and professions in recent years
It widely applies.
The acquisition and preparation of hydrogel are broadly divided into two major classes from the point of view of material source: one is based on petroleum resources
Synthesis type hydrogel, such as polyacrylic acid and its ester series hydrogel, polyvinyl alcohol series hydrogel, such as Publication No.
CN106554454A, patent name are that a kind of patent of the preparation method and application of polyacrylic acid hydrogel adsorbent material discloses
A kind of preparation method of polyacrylic acid hydrogel, but it is non-renewable energy resources that such hydrogel its starting, which prepares material, and environmental protection
Performance is poor；Second it is such as to belong to the shallow lake of polysaccharide based on natural polymer or the non-synthetic type hydrogel of starting material
Powder based aquagel, cellulose base hydrogel etc., the manufacture of this kind of hydrogel starting prepare on material basic environment-friendly degradable and
Raw material sources are also relatively broad, renewable etc., and Publication No. CN105504315B, patent name is a kind of stalk full constituent water-setting
The patent of the preparation method and applications of glue discloses a kind of method for preparing hydrogel as starting material using stalk, but this method
Stalk is pre-processed using chemical method, so that the fibrous fracture in stalk, destroys hemicellulose, lignin to cellulose
Package, poor processing effect, energy consumption is high, and method is complicated, and the practicability is poor；Furthermore in the prior art based on natural polymer
Hydrogel water retention property is poor, hinders its application.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of poplar steam blasting liquid hemicellulose based aquagel and its preparations
Method, for hydrogel based on the hemicellulose in poplar steam blasting liquid, starting prepares that material source is extensive, and the feature of environmental protection is strong,
The preparation method of hydrogel is simple, practical, and the hydrogel water retention property obtained is excellent.
To solve the above-mentioned problems, the present invention provides a kind of poplar steam blasting liquid hemicellulose based aquagel, and poplar steams
It is by hemicellulose and acrylamide in poplar steam blasting liquid and acrylic acid-grafted that liquid hemicellulose based aquagel is broken in steam explosion
It is copolymerized the three-dimensional net structure polymer formed, poplar steam blasting liquid is that poplar obtains after steam blasting.
Wherein, poplar steam blasting liquid refers to handles poplar under high temperature and high pressure steam, makes the hemicellulose portion in poplar
Divide degradation, lignin softening in part is degraded, and makes the chemical composition part of lignocellulose raw material during instant decompression blowing
Separation and structure change, and the decomposition of wood fibre structural constituent causes in the thermal energy occurred in vapour form, by vapor expansion
Shearing force and hydrolysis of glycoside bond collective effect under occur.Poplar product after steam blasting be mainly steam blasting liquid and
Fibrous solids product, complicated component, the predominantly glycan and monosaccharide of hemicellulose group in steam blasting liquid have hydrophily base
The acrylamide monomer and acrylic monomers of group are grafted on the hemicellulose in poplar steam blasting liquid, and are polymerize, handed over
The hydrogel obtained after connection has good moisture expansivity；Also, using poplar steam blasting liquid as hemicellulose source, first poplar
It is from a wealth of sources, renewable, environment-friendly degradable, secondly, obtaining hemicellulose with method chemically treated to poplar, physical treatment
It compares, poplar obtains hemicellulose through Steam explosion treatment, and short processing time, high treating effect, low energy consumption, without using chemistry examination
Agent, environmental pollution is small, and steam blasting liquid is without continuing to separate, directly with containing there are many steam blasting liquid of hemicellulose and
Hydrophilic monomer carries out graft copolymerization, and the preparation process of hydrogel is more simplified, more practical.
In technical solution, it is preferred that hemicellulose, acrylamide, acrylic acid mass ratio be 1:(1-5): (1-10).More
Preferably, hemicellulose, acrylamide, acrylic acid mass ratio be 1:(1-2): (1-4).
In technical solution, it is preferred that the raw material for preparing of poplar steam blasting liquid hemicellulose based aquagel further includes causing
The mass ratio of agent and crosslinking agent, initiator and acrylamide is 1:(2-10)；It is furthermore preferred that the quality of initiator and acrylamide
Than for 1:(3-5).The mass ratio of crosslinking agent and acrylamide is 1:(10-60), the matter of preferred crosslinking agent and acrylamide
Amount is than being 1:(25-40).Poplar steam blasting liquid and acrylamide monomer, acrylic monomers initiator and crosslinking agent effect
Lower progress graft copolymerization and cross-linking reaction obtain the polymer of three-dimensional net structure.
In technical solution, it is preferred that initiator is the combination of one or both of ammonium persulfate and sodium sulfite；Into one
Step is preferred, and initiator is the mixture of ammonium persulfate and sodium sulfite；It is furthermore preferred that initiator is ammonium persulfate and sulfurous acid
The mixture that sodium is mixed with the mass ratio of 1:2.
In technical solution, it is preferred that crosslinking agent N, N- methylene-bisacrylamide.
It is a further object of the present invention to provide a kind of sides for preparing above-mentioned poplar steam blasting liquid hemicellulose based aquagel
Method, comprising the following steps:
S1, Steam explosion treatment is carried out to poplar, and poplar steam blasting liquid is obtained by filtration in obtained product；
S2, the resulting poplar steam blasting liquid of step S1 is mixed with acrylamide, acrylic acid, initiator and crosslinking agent,
Graft copolymerization and cross-linking reaction are carried out, three-dimensional net structure polymer is obtained；
S3, it will be stood under the resulting three-dimensional net structure polymer constant temperature of step S2, obtain poplar steam blasting liquid half fiber
Tie up plain based aquagel.
Poly-pentose rich in and a small amount of glucan in poplar steam blasting liquid can generate hydroxyl after initiator is added
Free radical introduces hydrophilic radical amide group and carboxyl so that graft reaction occur with monomeric acrylamide and acrylic acid, from
And increase the hydrophily of hydrogel, after crosslinking agent is added, it can promote to form it into the network structure with crosslinking copolymerization, copolymerization is handed over
The network structure of connection obtains poplar steam blasting liquid hemicellulose based aquagel through standing water suction.Ammonium persulfate and sodium sulfite are
The initiator of redox system is generated free radicals by the way that redox reaction occurs.
In technical solution, it is preferred that in step S1, before carrying out Steam explosion treatment to poplar, also answer poplar
Water balance processing, moisture is controlled 35%；It is further preferred that poplar carry out rehydration Balance Treatment be specially by poplar into
Enter equilibrium water conten in the hermetic bag equipped with distilled water, by moisture control 35% or so, balances 48h.
In technical solution, it is preferred that in step S1, the treatment conditions of Steam explosion treatment are carried out to poplar are as follows: steam is quick-fried
Broken temperature is 201-220 DEG C, and steam blasting pressure is 1.6-2.4MPa, and the steam blasting dimension pressure time is 7-10min.
In technical solution, it is preferred that step S1 further include to obtained poplar steam blasting liquid by step S1a at
Reason, step S1a are as follows: poplar steam blasting liquid is rotated at 40-55 DEG C, obtains poplar steam blasting concentrated liquor.
In technical solution, it is preferred that step S1 further includes passing through step to poplar steam blasting concentrated liquor after step S1a
Rapid S1b is handled, step S1b are as follows: poplar steam blasting concentrated liquor is preheated 5-15min at 40-60 DEG C, and is stirred
It mixes, stirring rate 100-300r/min.
In technical solution, it is preferred that step S2 specifically:
S21. initiator is added in poplar steam blasting liquid, stirs 5-15min；
S22. acrylamide is added in the resulting reaction solution of step S21, stirs 5-15min；
S23. acrylic acid is added in the resulting reaction solution of step S22, stirs 5-15min；
S24. crosslinking agent is added in the resulting reaction solution of step S23, is stirred, obtain three-dimensional net structure polymerization
Object.
In technical solution, it is preferred that step S3 specifically: three-dimensional net structure polymer reaction system is placed in 25 DEG C
In isoperibol, standing obtains poplar steam blasting liquid hemicellulose based aquagel for 24 hours.
In technical solution, it is preferred that also carry out S4 after step S3: handling poplar steam blasting liquid hemicellulose using NaOH
Then unreacted reagent in plain based aquagel handles poplar steam blasting liquid hemicellulose based aquagel table using deionized water
The NaOH in face.
Compared with the prior art, the present invention has the following beneficial effects:
1. poplar steam blasting liquid hemicellulose based aquagel of the invention, with the hemicellulose in poplar steam blasting liquid
The glycan and monosaccharide of base are main chain, and acrylamide monomer and acrylic monomers with hydrophilic radical are grafted on hemicellulose
On, become three-dimensional net structure polymer after aggregated, crosslinking, which has good moisture expansivity；Also, it is steamed with poplar
Steam explosion break liquid be hemicellulose source, poplar first is from a wealth of sources, renewable, environment-friendly degradable, secondly, with to poplar through chemistry
Processing, physical treatment method obtain hemicellulose compare, poplar obtains hemicellulose, treatment effect through Steam explosion treatment
Good, low energy consumption, and environmental pollution is small, and steam blasting liquid is directly used without continuing to separate containing there are many steam of hemicellulose
Explosion liquid and hydrophilic monomer carry out graft copolymerization, and the preparation process of hydrogel is more simplified, more practical；
2. poplar steam blasting liquid hemicellulose based aquagel of the invention and preparation method thereof, by regulating and controlling poplar steam
Blasting technology condition, the initiator ammonium persulfate of addition and anhydrous sodium sulfite, monomeric acrylamide, acrylic acid and crosslinking agent N,
Content, graft copolymerization and the cross-linking reaction time of N- methylene-bisacrylamide, obtain with excellent swollen performance and guarantor
The poplar steam blasting liquid hemicellulose based aquagel of aqueous energy, moisture expansivity 286.6g/g are placed in 180h in 20 DEG C of environment
Water retention value afterwards is 60.3%；
3. the preparation method of poplar steam blasting liquid hemicellulose based aquagel of the invention, using the method for steam blasting
Poplar is pre-processed, the high temperature and pressure that saturated vapor generates pre-processes lignocellulose raw material within the shorter reaction time, drops significantly
Low poplar pretreatment time improves pretreatment efficiency, in addition, the product after steam explosion is broadly divided into two parts, explosion liquid and fibre
The solid product of shape is tieed up, the ingredient composition of borehole blasting liquid is more complicated, and main component is the glycan and monosaccharide of hemicellulose group,
And the separating-purifying of various components is relatively difficult, the present invention does not separate explosion liquid, directly it is concentrated, preparation half
Cellulose base hydrogel, preparation method greatly simplify, and preparation process is simpler, more practical.
Detailed description of the invention
Fig. 1 is the flow chart of the preparation method of poplar steam blasting liquid hemicellulose based aquagel of the present invention；
Fig. 2 is the photo of poplar steam blasting liquid hemicellulose based aquagel obtained in the embodiment of the present invention 1；
Fig. 3 is the scanning electron microscope (SEM) photograph of poplar steam blasting liquid hemicellulose based aquagel obtained in the embodiment of the present invention 1:
A. before being swollen；B. after being swollen.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical solution of the present invention is clearly and completely described, it is clear that
Described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the implementation in the present invention
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The scope of protection of the invention.
Embodiment 1
Poplar steam blasting liquid hemicellulose based aquagel described in the present embodiment, for by half in poplar steam blasting liquid
The three-dimensional net structure polymer that cellulose and acrylamide and acrylic graft copolymer are formed, hemicellulose, propylene in raw material
Amide, acrylic acid mass ratio be 1:1.3:3.6.
The preparation method of poplar steam blasting liquid hemicellulose based aquagel described in the present embodiment is specific as follows:
S1., poplar is immersed in in the hermetic bag for have distilled water progress rehydration balance, by moisture control 35% or so,
It is placed in 6 DEG C of refrigerator, balances 48h；Poplar piece after rehydration is balanced is put into autoclave, first in autoclave
It is passed through steam, so that being kept the temperature after temperature rises to 209 DEG C, and maintains pressure, the dimension pressure time is 7min, in dimension pressure heat preservation
Afterwards, explosive decompression carries out explosion treatment to poplar piece, after explosion, collects steam explosion treated poplar explosion liquid, carried out
Filter, takes filtrate to obtain poplar steam blasting liquid；Poplar steam blasting liquid is rotated at 40 DEG C, it is dense to obtain poplar steam blasting liquid
Contracting liquid, the mass concentration of hemicellulose is about 5% in poplar steam blasting concentrated liquor；By poplar steam blasting concentrated liquor in
10min is preheated at 40 DEG C, and continues to stir, stirring rate 200r/min；
S2. it takes the poplar steam blasting concentrated liquor of 10g in beaker, initiator 0.14g is added into beaker, makes its hair
Raw redox, sufficiently reaction generate free radicals, and initiator is that ammonium persulfate and anhydrous sodium sulfite are mixed according to mass ratio 1:2
Mixture, monomeric acrylamide 0.65g is added after 15min, continues that monomeric acrylic 1.8g is added after stirring 15min, will be single
It is body acrylamide, acrylic acid-grafted on hemicellulose chain, crosslinking agent N, N- methylene bisacrylamide acyl are added after being spaced 15min
Amine 0.019g, rush form it into three-dimensional net structure polymer；
S3. after a certain period of time to its reaction, it is stood to the poplar steam for taking out forming afterwards for 24 hours under 25 DEG C of environment of constant temperature
Explosion liquid hemicellulose based aquagel；
S4., the poplar steam blasting liquid hemicellulose based aquagel of forming is placed in the culture dish for filling the NaOH of 1mol/L
Middle immersion for 24 hours, removes unreacted reagent；Poplar steam blasting liquid hemicellulose based aquagel is placed in handle in deionized water afterwards
The NaOH of gel surface is removed, and finally dries 60 DEG C of based aquagel of poplar steam blasting liquid hemicellulose.
The moisture expansivity of obtained poplar steam blasting liquid hemicellulose based aquagel is measured, measuring its moisture expansivity is
Its water retention value is 60.3% after 286.6g/g, 180h.
Such as the flow chart for the preparation method that Fig. 1 is poplar steam blasting liquid hemicellulose based aquagel of the invention；Fig. 2 is
The photo of the resulting poplar steam blasting liquid hemicellulose based aquagel of the present embodiment；A is the resulting poplar of the present embodiment in Fig. 3
Scanning electron microscope (SEM) photograph before steam blasting liquid hemicellulose group swelling behavior, b are the resulting poplar steam blasting liquid of the present embodiment
Scanning electron microscope (SEM) photograph after hemicellulose group swelling behavior, it can be seen that the sample that the present embodiment obtains has three-dimensional network knot
Structure is filled in three-dimensional net structure by water after swelling, network structure expansion.
Embodiment 2
Poplar steam blasting liquid hemicellulose based aquagel described in the present embodiment, for by half in poplar steam blasting liquid
The three-dimensional net structure polymer that cellulose and acrylamide and acrylic graft copolymer are formed, hemicellulose, propylene in raw material
Amide, acrylic acid mass ratio be 1:1.4:3.
The preparation method of poplar steam blasting liquid hemicellulose based aquagel described in the present embodiment is specific as follows:
S1., poplar is immersed in in the hermetic bag for have distilled water progress rehydration balance, by moisture control 35% or so,
It is placed in 6 DEG C of refrigerator, balances 48h；Poplar piece after rehydration is balanced is put into autoclave, first in autoclave
It is passed through steam, so that being kept the temperature after temperature rises to 209 DEG C, and maintains pressure, the dimension pressure time is 7min, in dimension pressure heat preservation
Afterwards, explosive decompression carries out explosion treatment to poplar piece, after explosion, collects steam explosion treated poplar explosion liquid, carried out
Filter, takes filtrate to obtain poplar steam blasting liquid；Poplar steam blasting liquid is rotated at 50 DEG C, it is dense to obtain poplar steam blasting liquid
Contracting liquid, the mass concentration of hemicellulose is about 5% in poplar steam blasting concentrated liquor；By poplar steam blasting concentrated liquor in
10min is preheated at 50 DEG C, and continues to stir, stirring rate 100r/min；
S2. it takes the poplar steam blasting concentrated liquor of 10g in beaker, initiator 0.14g is added into beaker, makes its hair
Raw redox, sufficiently reaction generate free radicals, and initiator is that ammonium persulfate and anhydrous sodium sulfite are mixed according to mass ratio 1:2
Mixture, monomeric acrylamide 0.7g is added after 15min, continues that monomeric acrylic 1.5g is added after stirring 15min, by monomer
It is acrylamide, acrylic acid-grafted on hemicellulose chain, crosslinking agent N, N- methylene-bisacrylamide are added after being spaced 15min
0.018g, rush form it into three-dimensional net structure polymer；
S3. after a certain period of time to its reaction, it is stood to the poplar steam for taking out forming afterwards for 24 hours under 25 DEG C of environment of constant temperature
Explosion liquid hemicellulose based aquagel；
S4., the poplar steam blasting liquid hemicellulose based aquagel of forming is placed in the culture dish for filling the NaOH of 1mol/L
Middle immersion for 24 hours, removes unreacted reagent；Poplar steam blasting liquid hemicellulose based aquagel is placed in handle in deionized water afterwards
The NaOH of gel surface is removed, and finally dries 60 DEG C of based aquagel of poplar steam blasting liquid hemicellulose.
The moisture expansivity of obtained poplar steam blasting liquid hemicellulose based aquagel is measured, measuring its moisture expansivity is
215.7g/g。
Embodiment 3
Poplar steam blasting liquid hemicellulose based aquagel described in the present embodiment, for by half in poplar steam blasting liquid
The three-dimensional net structure polymer that cellulose and acrylamide and acrylic graft copolymer are formed, hemicellulose, propylene in raw material
Amide, acrylic acid mass ratio be 1:1:4.
The preparation method of poplar steam blasting liquid hemicellulose based aquagel described in the present embodiment is specific as follows:
S1., poplar is immersed in in the hermetic bag for have distilled water progress rehydration balance, by moisture control 35% or so,
It is placed in 6 DEG C of refrigerator, balances 48h；Poplar piece after rehydration is balanced is put into autoclave, first in autoclave
It is passed through steam, so that being kept the temperature after temperature rises to 209 DEG C, and maintains pressure, the dimension pressure time is 7min, in dimension pressure heat preservation
Afterwards, explosive decompression carries out explosion treatment to poplar piece, after explosion, collects steam explosion treated poplar explosion liquid, carried out
Filter, takes filtrate to obtain poplar steam blasting liquid；Poplar steam blasting liquid is rotated at 55 DEG C, it is dense to obtain poplar steam blasting liquid
Contracting liquid, the mass concentration of hemicellulose is about 5% in poplar steam blasting concentrated liquor；By poplar steam blasting concentrated liquor in
10min is preheated at 60 DEG C, and continues to stir, stirring rate 300r/min；
S2. it takes the poplar steam blasting concentrated liquor of 10g in beaker, initiator 0.14g is added into beaker, makes its hair
Raw redox, sufficiently reaction generate free radicals, and initiator is that ammonium persulfate and anhydrous sodium sulfite are mixed according to mass ratio 1:2
Mixture, monomeric acrylamide 0.5g is added after 15min, continues that monomeric acrylic 2.0g is added after stirring 15min, by monomer
It is acrylamide, acrylic acid-grafted on hemicellulose chain, crosslinking agent N, N- methylene-bisacrylamide are added after being spaced 15min
0.018g, rush form it into three-dimensional net structure polymer；
S3. after a certain period of time to its reaction, it is stood to the poplar steam for taking out forming afterwards for 24 hours under 25 DEG C of environment of constant temperature
Explosion liquid hemicellulose based aquagel；
S4., the poplar steam blasting liquid hemicellulose based aquagel of forming is placed in the culture dish for filling the NaOH of 1mol/L
Middle immersion for 24 hours, removes unreacted reagent；Poplar steam blasting liquid hemicellulose based aquagel is placed in handle in deionized water afterwards
The NaOH of gel surface is removed, and finally dries 60 DEG C of based aquagel of poplar steam blasting liquid hemicellulose.
The moisture expansivity of obtained poplar steam blasting liquid hemicellulose based aquagel is measured, measuring its moisture expansivity is
219g/g。
Embodiment 4
Poplar steam blasting liquid hemicellulose based aquagel described in the present embodiment, for by half in poplar steam blasting liquid
The three-dimensional net structure polymer that cellulose and acrylamide and acrylic graft copolymer are formed, hemicellulose, propylene in raw material
Amide, acrylic acid mass ratio be 1:2:4.
The preparation method concrete technology condition of poplar steam blasting liquid hemicellulose based aquagel described in the present embodiment is handed over
It is in the same manner as in Example 1 to join the other conditions such as agent, initiator amount.
Embodiment 5
Poplar steam blasting liquid hemicellulose based aquagel described in the present embodiment, for by half in poplar steam blasting liquid
The three-dimensional net structure polymer that cellulose and acrylamide and acrylic graft copolymer are formed, hemicellulose, propylene in raw material
Amide, acrylic acid mass ratio be 1:5:10.
The preparation method concrete technology condition of poplar steam blasting liquid hemicellulose based aquagel described in the present embodiment is handed over
It is in the same manner as in Example 1 to join the other conditions such as agent, initiator amount.
Embodiment 6
Poplar steam blasting liquid hemicellulose based aquagel described in the present embodiment, for by half in poplar steam blasting liquid
The three-dimensional net structure polymer that cellulose and acrylamide and acrylic graft copolymer are formed, hemicellulose, propylene in raw material
Amide, the mass ratio of acrylic acid, crosslinking agent, preparation process condition are in the same manner as in Example 1, the difference is that the present embodiment system
Initiator amount is 0.217g in standby raw material.
Embodiment 7
Poplar steam blasting liquid hemicellulose based aquagel described in the present embodiment, for by half in poplar steam blasting liquid
The three-dimensional net structure polymer that cellulose and acrylamide and acrylic graft copolymer are formed, hemicellulose, propylene in raw material
Amide, the mass ratio of acrylic acid, crosslinking agent, preparation process condition are in the same manner as in Example 1, the difference is that the present embodiment system
Initiator amount is 0.325g in standby raw material.
Embodiment 8
Poplar steam blasting liquid hemicellulose based aquagel described in the present embodiment, for by half in poplar steam blasting liquid
The three-dimensional net structure polymer that cellulose and acrylamide and acrylic graft copolymer are formed, hemicellulose, propylene in raw material
Amide, the mass ratio of acrylic acid, crosslinking agent, preparation process condition are in the same manner as in Example 1, the difference is that the present embodiment system
Initiator amount is 0.065g in standby raw material.
Embodiment 9
Poplar steam blasting liquid hemicellulose based aquagel described in the present embodiment, for by half in poplar steam blasting liquid
The three-dimensional net structure polymer that cellulose and acrylamide and acrylic graft copolymer are formed, hemicellulose, propylene in raw material
Amide, the mass ratio of acrylic acid, initiator, preparation process condition are in the same manner as in Example 1, the difference is that the present embodiment system
Dosage of crosslinking agent is 0.026g in standby raw material.
Embodiment 10
Poplar steam blasting liquid hemicellulose based aquagel described in the present embodiment, for by half in poplar steam blasting liquid
The three-dimensional net structure polymer that cellulose and acrylamide and acrylic graft copolymer are formed, hemicellulose, propylene in raw material
Amide, the mass ratio of acrylic acid, initiator, preparation process condition are in the same manner as in Example 1, the difference is that the present embodiment system
Dosage of crosslinking agent is 0.016g in standby raw material.
Embodiment 11
Poplar steam blasting liquid hemicellulose based aquagel described in the present embodiment, for by half in poplar steam blasting liquid
The three-dimensional net structure polymer that cellulose and acrylamide and acrylic graft copolymer are formed, hemicellulose, propylene in raw material
Amide, the mass ratio of acrylic acid, initiator, preparation process condition are in the same manner as in Example 1, the difference is that the present embodiment system
Dosage of crosslinking agent is 0.065g in standby raw material.
Embodiment 12
Poplar steam blasting liquid hemicellulose based aquagel described in the present embodiment, for by half in poplar steam blasting liquid
The three-dimensional net structure polymer that cellulose and acrylamide and acrylic graft copolymer are formed, hemicellulose, propylene in raw material
Amide, the mass ratio of acrylic acid, crosslinking agent, preparation process condition are in the same manner as in Example 1, the difference is that the present embodiment system
Initiator amount is 0.011g in standby raw material.
Table 1 is poplar steam blasting liquid hemicellulose based aquagel preparation condition obtained by 9 embodiments and moisture expansivity data
Table can be obtained by 1 data of table, the quality of poplar steam blasting liquid, acrylamide, acrylic acid, initiator, crosslinking agent in preparation process
Than difference, the moisture expansivity of obtained poplar steam blasting liquid hemicellulose based aquagel is different, in raw material, hemicellulose, propylene
Amide, acrylic acid preferred mass ratio be 1:(1-2): (1-4), and when mass ratio selects 1:1.3:3.6 have expect not
The optimal moisture expansivity arrived, the preferred initiator of dosage of initiator in raw material: the proportion of acylamide 1:(3-5), and drawing
Send out agent: with unexpected optimal moisture expansivity when the proportion of acylamide is 1:4.64；The dosage of crosslinking agent is preferably crosslinked
Agent: the proportion of acylamide 1:(25-40), and in crosslinking agent: have when the proportion of acylamide is 1:34.21 unexpected
Optimal moisture expansivity.
Table 1
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (10)
1. a kind of poplar steam blasting liquid hemicellulose based aquagel, it is characterised in that: the poplar steam blasting liquid hemicellulose
Plain based aquagel includes three formed by the hemicellulose in poplar steam blasting liquid with acrylamide and acrylic graft copolymer
Network structure polymer is tieed up, the poplar steam blasting liquid is that poplar obtains after steam blasting.
2. poplar steam blasting liquid hemicellulose based aquagel according to claim 1, it is characterised in that: the hemicellulose
Element, acrylamide, acrylic acid mass ratio be 1:(1-5): (1-10).
3. poplar steam blasting liquid hemicellulose based aquagel according to claim 1, which is characterized in that the poplar steams
The raw material for preparing that liquid hemicellulose based aquagel is broken in steam explosion further includes initiator and crosslinking agent, the initiator and acrylamide
Mass ratio is 1:(2-10)；The mass ratio of the crosslinking agent and acrylamide is 1:(10-60).
4. poplar steam blasting liquid hemicellulose based aquagel according to claim 3, it is characterised in that: the initiator
For the combination of one or both of ammonium persulfate and sodium sulfite.
5. poplar steam blasting liquid hemicellulose based aquagel according to claim 3, it is characterised in that: the crosslinking agent
For N, N- methylene-bisacrylamide.
6. a kind of method for preparing poplar steam blasting liquid hemicellulose based aquagel a method as claimed in any one of claims 1 to 5,
It is characterized in that, comprising the following steps:
S1, Steam explosion treatment is carried out to poplar, and poplar steam blasting liquid is obtained by filtration in obtained product；
S2, the resulting poplar steam blasting liquid of step S1 is mixed with acrylamide, acrylic acid, initiator and crosslinking agent, is carried out
Graft copolymerization and cross-linking reaction obtain three-dimensional net structure polymer；
S3, it will be stood under the resulting three-dimensional net structure polymer constant temperature of step S2, obtain the poplar steam blasting liquid half fiber
Tie up plain based aquagel.
7. the method according to claim 6 for preparing poplar steam blasting liquid hemicellulose based aquagel, which is characterized in that
In step S1, the treatment conditions of Steam explosion treatment are carried out to the poplar are as follows: steam blasting temperature is 201-220 DEG C, steam
Burst pressure is 1.6-2.4MPa, and the steam blasting dimension pressure time is 7-10min.
8. the method according to claim 6 for preparing poplar steam blasting liquid hemicellulose based aquagel, which is characterized in that
Step S1 further includes being handled by step S1a the obtained poplar steam blasting liquid, step S1a are as follows: by the poplar
The wooden steam blasting liquid rotates at 40-55 DEG C, obtains poplar steam blasting concentrated liquor.
9. the method according to claim 8 for preparing poplar steam blasting liquid hemicellulose based aquagel, which is characterized in that
Step S1 further includes being handled by step S1b after step S1a the poplar steam blasting concentrated liquor, step S1b
Are as follows: the poplar steam blasting concentrated liquor is preheated into 5-15min at 40-60 DEG C, and is stirred, stirring rate 100-
300r/min。
10. the method according to claim 6 for preparing poplar steam blasting liquid hemicellulose based aquagel, feature exist
In step S2 specifically:
S21. the initiator is added in the poplar steam blasting liquid, stirs 5-15min；
S22. acrylamide is added in the resulting reaction solution of step S21, stirs 5-15min；
S23. acrylic acid is added in the resulting reaction solution of step S22, stirs 5-15min；
S24. the crosslinking agent is added in the resulting reaction solution of step S23, is stirred, it is poly- to obtain the three-dimensional net structure
Close object.
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