CN106699990A - Synthetic water absorption and water retention material with high volume of non-dehydrated state sludge and preparing method - Google Patents
Synthetic water absorption and water retention material with high volume of non-dehydrated state sludge and preparing method Download PDFInfo
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- CN106699990A CN106699990A CN201611088155.0A CN201611088155A CN106699990A CN 106699990 A CN106699990 A CN 106699990A CN 201611088155 A CN201611088155 A CN 201611088155A CN 106699990 A CN106699990 A CN 106699990A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F285/00—Macromolecular compounds obtained by polymerising monomers on to preformed graft polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/18—Suspension polymerisation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F251/00—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K11/00—Use of ingredients of unknown constitution, e.g. undefined reaction products
- C08K11/005—Waste materials, e.g. treated or untreated sewage sludge
Abstract
The inventionrelates to a synthetic water absorption and water retention material with high volume of non-dehydrated state sludge and a preparing method, wherein sodium hydroxide is first used to neutralize acrylic monomer; then starch additive is then added to the mixture solution obtained in step 1, so that the starch is dissolved; potassium persulfate solution is then added to the mixture solution for reaction; aqueous dispersion of non-dehydrated state sludge is then added to the mixture solution in step 3 for reaction; aqueous solution of N,N'-methylenediacrylamide is then added to the mixture solution in step 5 for polymerization reaction; the liquid is then poured out and the remaining substances are dried to obtain the synthetic water absorption and water retention material with high volume of non-dehydrated state sludge. The method in the invention adopts a new material ratio and synthesis routes, prepares a water absorption and water retention material having high water absorbency without needing the sludge in the dehydration state, greatly reduces the preparing cost for the water absorption and water retention material, and provides a whole new preparing method for the sludge to have high value-added application and turning waste into wealth. The effective preparation and promotion of the material can effectively save energy and reduce emission.
Description
【Technical field】
The present invention relates to a kind of preparation technology of novel absorbent water-keeping material, particularly a kind of non-dehydration state sludge high additive
Synthesis water-absorbing-retaining material and preparation method.
【Background technology】
During to industry and municipal sewage treatment, substantial amounts of sludge is produced, its composition and content are：Organic humus
(Sludge from primary sedimentation tank contains 33%, and digested sludge contains 35%, and activated sludge contains 41%, and 47%) humus sludge containing being that good soil changes
Good dose；Protein, fat, vitamin are valuable animal feed ingredients.So, sludge has potential value, draws
The lasting concern of domestic and international government, enterprise and researcher, research and extension has been played to use.At present, the main side of sludge treatment
Formula has landfill, throws sea, burns and Land_use change.These methods can accommodate substantial amounts of sludge, be the effective way of sludge treatment,
But wherein there is also problems.In order to make full use of sludge resource, mitigate environmental hazard, many countries are all energetically in the world
The various technologies of development specific resistance to filtration and recycling, achieve good economic benefit and social benefit.
It is that sludge is applied into water-absorbing-retaining material field to have carried out substantial amounts of research promotion work to have researcher.Water suction is protected
Water material belongs to a kind of super absorbent resin material, is a kind of feature containing strongly hydrophilic group and with certain degree of cross linking
Macromolecular material.The material is water insoluble, is also insoluble in organic solvent, can absorb hundreds times or even thousands of times of own wts
Water, and water retention property is strong, even if pressure (hydraulic) water will not also be extruded, due to the good water-absorbing-retaining ability of super absorbent resin,
It is widely used in the multiple industry field such as medical treatment, health, construction material, environmental protection, agricultural, forestry and food.Height is inhaled
Water-base resin species is various, typically can be divided into STARCH GRAFT POLYMER SUPER ABSORBENT RESIN, fiber by the raw material sources of super absorbent resin
Plain class high hydroscopic resin and synthesis class high hydroscopic resin etc.；Wherein, and with polyacrylate type high water absorption resin it is production at present
Most class synthesis class high hydroscopic resins, is formed by acrylic acid or its esters with the monomer copolymerization with two degrees of functionality.Typically
With water absorbent rate is high, preparation process is simple, water suction and water holding capacity are strong, absorption speed is very fast, hydrolysis, gel is strong after water suction
The features such as spending good big and antibiotic property but degradability difference.The preparation method of superabsorbent mainly have mass polymerization,
The methods such as solution polymerization process, via Inverse-Phase Suspension Polymerization and reversed emulsion polymerization.
But, it is that sludge has to pass through dehydration and dried process using the precondition of sludge, because sludge moisture content reaches
60%-80%, and this life is in gel-like structure, so, the dry difficulty of sludge dewatering and industrial cost are higher, cause a large amount of
Energy consumption, this be hinder sludge further apply one of principal element of more high-end field and high end materials product；Japan,
Sludge after Europe and the U.S. have researcher to dehydrate is prepared for sludge-filled class high water absorbing and retaining performances resin using the richness method of mixing
Material, but promoting the use of for the technology cannot be carried out always, and reason is also such.In view of China's water resource is very deficient, state
Native desertification is on the rise, the fundamental realities of the country of the relatively low and a large amount of loss of chemical fertilizer of the utilization rate of chemical fertilizer and polluted source, and exploitation is a kind of
Efficiently, the water-absorbing-retaining material of inexpensive and environmental protection, will saving water, resisting drought, Desert Control, afforestation, reduction chemical fertilizer stream
Losing the aspects such as raising chemical fertilizer utilization ratio will play a significant role.
【The content of the invention】
In view of technical barrier present in above-mentioned utilization sludge synthesis water-absorbing-retaining material, it is an object of the invention to provide
A kind of non-dehydration state sludge high additive synthesis water-absorbing-retaining material and preparation method, the present invention use a kind of new material mixture ratio
And synthesis route, sludge do not need dewatering state be it is non-dehydration state under conditions of prepare with high water absorption multiplying power water suction
Water-keeping material, greatly reduces the preparation cost of water-absorbing-retaining material, also for sludge value added applications and turn waste into wealth
There is provided a kind of brand-new preparation method, effective preparation and popularization of the material can effectively energy-saving and emission-reduction.
The purpose of the present invention is achieved through the following technical solutions：
A kind of non-dehydration state sludge high additive synthesizes the preparation method of water-absorbing-retaining material, comprises the following steps：
Step one, with NaOH and acrylic monomers, the mixed solution clarified；
Step 2, then to starch additive is added in the mixed solution obtained by step one, make starch dissolution；
Step 3, then to adding potassium persulfate solution to be reacted in mixed solution, react sticky to solution, color is in breast
White；
Step 4, then to adding the aqueous dispersions of non-dehydration state sludge to be reacted in the mixed solution of step 3, react
To solution blackening, viscosity of the viscosity higher than the solution of step 3；
Step 5, then to adding the aqueous solution of N, N '-methylene-bisacrylamide to be gathered in the mixed solution of step 5
Reaction is closed, to solution layering；
Step 6, after the polymerisation of step 5 is complete, liquid is poured out, and it is non-de- that remaining material carries out drying
Aquosity sludge high additive synthesizes water-absorbing-retaining material.
In the step one to step 5, in terms of mass fraction, NaOH is 10-15 parts, acrylic monomers to each component
It is 10-20 parts, starch additive is 5-10 parts, potassium peroxydisulfate is 0.2-0.6 parts, non-dehydration state sludge is 40-60 parts, N, N '-
Methylene-bisacrylamide is 0.02-0.06 parts.
In the step one, under the conditions of ice-water bath, by NaOH and acrylic monomers, NaOH and propylene
The degree of neutralization of acid monomers is 50%-85%.
In the step 2, by mixed solution in 40 DEG C of -50 DEG C of heating water baths after starch dissolution.
In the step 3, reacted 30-40 minutes to potassium persulfate solution is added in mixed solution.
In the step 4, the pH value of the aqueous dispersions of non-dehydration state sludge is 4-6, and the reaction time is 2-2.5 hours.
In the step 4, the aqueous dispersions of non-dehydration state sludge are obtained by the non-dehydration state sludge after sterilizing.
In the step 5, reaction temperature is 40-50 DEG C, and the reaction time is 2-2.5 hours, is constantly stirred during the course of the reaction
Mix.
In the step 6, drying temperature is 80-90 DEG C, and the time is 3-4 hours.
Compared with prior art, the present invention has the advantages that：
The present invention carries out neutralization reaction by NaOH and acrylic monomers, generates PAA, then in reaction system
Middle addition starch adds potassium persulfate solution and is reacted as additive, after starch dissolution, adds potassium peroxydisulfate conduct
Initiator, the aqueous dispersions for adding non-dehydration state sludge are reacted, and add N, N '-methylene-bisacrylamide it is water-soluble
Liquid, N, N '-methylene-bisacrylamide starts to gather as crosslinking agent, PAA and acrylamide under potassium peroxydisulfate effect
Close, generate polymer, the polymer that N, N '-methylene-bisacrylamide are produced with radical polymerization crosslinks reaction, is formed
Network structure, finally just mixed liquor is dried, and obtains final product non-dehydration state sludge high additive synthesis water-absorbing-retaining material；
The non-dehydration state sludge high additive synthesis water-absorbing-retaining material that the present invention is prepared using " suspension polymerisation " method, changes
Dry technique must be shifted to an earlier date when currently preparing new material using sludge, using the moisture provided in sludge gel rubber system from dissolving
Suspension system this life, simplify it is current be using sludge or other Inorganic Fillers Filled modified water absorbent water-keeping materials must be to inorganic
Cost caused by drying filler has been saved in the processing step that filler is dried in advance, the simplification of drying process section；
Prior art adds the suction prepared after inorganic filler in synthesizing inorganic filling modifier class water-absorbing-retaining material
The water absorbent rate of water water-keeping material material and the not filled water-absorbing-retaining material material prepared using same formula and technique
Water absorbent rate is low, and the 50% of the former water absorbent rate substantially the latter；And use non-dehydration state sludge synthesis of the present invention
Water-absorbing-retaining material and the water-absorbing-retaining material for being not added with non-dehydration state sludge synthesis of the present invention, in same formula and technique bar
Under part, water absorbent rate substantially the former 50% of the latter realizes the water-absorbing-retaining material prepared after class addition inorganic filler
The experimental technique and method of the water absorbent rate multiplication of material；
Compared with the water-absorbing-retaining material synthesized using other inorganic fillers, due to solid particle and humic in sludge
Plasmid footpath is very small, and micropore is more, and specific surface area and surface can be huge, and the polymer that can be produced with radical polymerization occurs physics and hands over
Connection, forms network structure, and when the materials'use is placed a period of time (be more than 12 months), the physical crosslinking point between polymer will
Dissociation is fallen off, the molecular system of network structure will be separated into the macromolecular of some chain structures, realize non-dehydration state dirty
Mud high additive synthesizes the automatic degraded of water-absorbing-retaining material, is conducive to the sustainable use of environment.
Further, prior art is in synthesizing inorganic filling modifier class water-absorbing-retaining material, added inorganic filler
The mass ratio of whole synthetic systems is accounted between 5%-10%；And each component that the present invention is used is in terms of mass fraction, hydroxide
Sodium is 10-15 parts, and acrylic monomers is 10-20 parts, and starch additive is 5-10 parts, and potassium peroxydisulfate is 0.2-0.6 parts, non-dehydration
State sludge is 40-60 parts, and N, N- methylene-bisacrylamide are 0.02-0.06 parts；Using non-dehydration state sludge of the present invention
(solid content 30wt%), its volume is reached between 12%-18%, realizes the mixing of richness high of sludge, is that high-volume uses sludge
Synthesis water-absorbing-retaining material is possibly realized.
Further, sterilizing is carried out by non-dehydration state sludge, is prevented from bacterium in sludge and degree of having thing
The preparation speed and the performance of water-absorbing-retaining of water-absorbing-retaining material prepared by matter influence.
【Brief description of the drawings】
Fig. 1 is the non-dehydration state sludge high additive synthesis water-absorbing-retaining material preparation technology flow chart of the present invention.
Fig. 2 is not added with the water-absorbing resin that sludge of the present invention and addition sludge of the present invention are prepared under same technique
Water absorbent rate versus time curve.
【Specific embodiment】
Below in conjunction with the accompanying drawings and embodiment is to non-dehydration state sludge high additive synthesis water-absorbing-retaining material and system of the invention
Preparation Method is described in detail.
As shown in figure 1, the preparation method of non-dehydration state sludge high additive synthesis water-absorbing-retaining material of the invention is specific
Step is as follows：
1) raw material is chosen
Non- dehydration state sludge (industrial goods)；N, N '-methylene-bisacrylamide (analysis is pure), acrylic acid (analysis is pure), hydrogen
Sodium oxide molybdena (analysis is pure), starch (analysis is pure), distilled water (analysis is pure), potassium peroxydisulfate (analysis is pure).
2) preparation technology
The first step, under the conditions of ice-water bath, in terms of mass fraction, with 10-15 parts of NaOH and 10-20 parts third
Acrylic monomer, degree of neutralization is controlled in 50%-85%, the mixed solution clarified；
Second step, in terms of mass fraction, during 5-10 parts of starch additive added into mixed solution obtained in the first step, treat
After starch dissolution, then mixed solution is added to equipped with agitator, the there-necked flask of condenser pipe, in 40-50 DEG C of water-bath
Heating；
3rd step, in terms of mass fraction, during 0.2-0.6 parts of initiator potassium persulfate dissolved in into suitable quantity of water, then by over cure
Sour potassium solution is added in there-necked flask described in second step, is reacted 30-40 minutes, reacts sticky to solution, and color is creamy white；
4th step, sludge is sterilized by microwave or ultraviolet-sterilization, in terms of mass fraction, by 40-60 parts of non-dehydration state
Sludge is dispersed in water, and the pH value for adjusting the aqueous dispersions of non-dehydration state sludge is 4.0-6.0；
5th step, the mixed solution of the 4th step is poured into the there-necked flask described in the 3rd step, reacted 2-2.5 hours, it is molten
Liquid blackening, viscosity further increases, and becomes more viscous；
6th step, in terms of mass fraction, 0.02-0.06 parts of crosslinking agent N, N '-methylene-bisacrylamide are dissolved in suitable
In amount water, add in there-necked flask described in the 5th step, being heated to 40-50 DEG C carries out polymerisation, stirs in course of reaction and constantly
Mix, the reaction time is 2-2.5 hours, layering occurs in solution, react complete after layering substantially；
7th step, liquid poured out container, then remaining material is put into vacuum drying chamber, at 80-90 DEG C
Drying obtains final product non-dehydration state sludge high additive synthesis water-absorbing-retaining material for 3-4 hours.
3), non-dehydration state sludge high additive of the invention synthesizes the preparation principle of water-absorbing-retaining material
Prepare non-dehydration state sludge high additive synthesis water-absorbing-retaining material and relate generally to radical polymerization, chemical crosslinking, thing
Reason crosslinking etc. mechanism：
The main of radical polymerization has two stages：
First stage：NaOH and acrylic acid carry out neutralization reaction, generate PAA；
Second stage：PAA and acrylamide start polymerization under potassium peroxydisulfate effect, generate polymer；
Chemical crosslinking is mainly N, and the polymer that N '-methylene-bisacrylamide is produced with radical polymerization is crosslinked instead
Should, form network structure.
The dominant mechanism of physical crosslinking is that the solid particle and humus particle diameter in sludge are very small, have up to nanoparticle
Level, specific surface area and surface can be huge, and particle surface has many micropores in addition, result in sludge and have compared with for other inorganic fillers
There is more preferable activity, the polymer that can be produced with radical polymerization is physical crosslinking, and forms network structure.This is also the present invention
The reason for water-absorbing-retaining material can produce water absorbent rate higher.It is also simultaneously that the water-absorbing-retaining material has automatic degraded
The reason for performance.
The structure and performance of non-dehydration state sludge high additive synthesis water-absorbing-retaining material can be by XRD, TG, DSC, TEM
Characterized with the tester equipment such as SEM；Can be imitated with technical indicators such as water absorbent rate, rate of water absorption, water conservation times
Fruit is evaluated.
A kind of non-dehydration state sludge high additive that in accordance with the present invention prepared by mechanism synthesizes water-absorbing-retaining material and does not add
Plus sludge of the present invention synthesizes the water absorbent rate versus time curve such as this hair of water-absorbing-retaining material under same technique
Shown in bright described Fig. 2, add the water-absorbing resin of sludge of the present invention and be not added with the water-absorbing resin of sludge of the present invention its water absorbent rate
Increase with the increase of absorbent time, but after the saturation that absorbs water, water-absorbing-retaining material prepared by the addition present invention
The water absorbent rate of resin is 2 times of the resin of the water-absorbing-retaining material for being not added with present invention preparation.
The present invention is further illustrated below by specific embodiment.
Embodiment 1
In the case of ice-water bath, with the acrylic monomers in the NaOH of 10g with 10g, degree of neutralization is controlled 70%, obtained
The mixed solution of clarification；5g starch is weighed again to be added into above-mentioned mixed solution, after after starch dissolution, then mixed liquor is added to
In equipped with agitator, the there-necked flask of condenser pipe, heated in 40 DEG C of thermostat water baths；0.2g potassium peroxydisulfates are dissolved in right amount again
Dissolved in water, then by persulfate aqueous solution addition there-necked flask, reacted 30 minutes, substantially risen to solution viscosity,
Color is creamy white；40g sludge is dispersed in water by after microwave disinfection sterilization, the aqueous dispersions of non-dehydration state sludge are adjusted
PH value be 5.0, then by it is non-dehydration state sludge aqueous dispersions pour into there-necked flask, react 2 hours, solution blackening, glue
Degree further increases, and becomes more viscous；0.02g crosslinking agents N, N '-methylene-bisacrylamide are dissolved in suitable quantity of water and added
In there-necked flask, there is layering in the stirring reaction at 40 DEG C, polymerisation 2 hours, solution, reacts complete after layering substantially；
During liquid after polymerization poured out into container, remaining material is put into vacuum drying chamber, and drying obtains final product non-for 3 hours at 80 DEG C
Dehydration state sludge high additive synthesis water-absorbing-retaining material.
Embodiment 2
In the case of ice-water bath, with the acrylic monomers in the NaOH of 15g with 20g, degree of neutralization is controlled 60%, obtained
The mixed solution of clarification；10g starch is weighed again to be added into above-mentioned mixed solution, after after starch dissolution, then mixed liquor is added
To equipped with agitator, the there-necked flask of condenser pipe, heated in 40 DEG C of thermostat water baths；It is suitable 0.6g potassium peroxydisulfates are dissolved in
Amount water in dissolved, then by persulfate aqueous solution add there-necked flask in, react 30 minutes, to solution viscosity it is obvious on
Rise, color is creamy white；60g sludge is dispersed in water by after microwave disinfection sterilization, the moisture of non-dehydration state sludge is adjusted
The pH value of dispersion liquid is 5.0, then pours into there-necked flask the aqueous dispersions of non-dehydration state sludge, is reacted 2 hours, and solution becomes
Black, viscosity further increases, and becomes more viscous；0.06g crosslinking agents N, N '-methylene-bisacrylamide are dissolved in suitable quantity of water simultaneously
Add in there-necked flask, layering occurs in the stirring reaction at 48 DEG C, polymerisation 2 hours, solution, has been reacted after layering substantially
Entirely；During liquid after polymerization poured out into container, remaining material is put into vacuum drying chamber, is dried 3.5 hours at 80 DEG C
Non- dehydration state sludge high additive synthesis water-absorbing-retaining material is obtained.
Embodiment 3
In the case of ice-water bath, with the acrylic monomers in the NaOH of 12.5g with 15g, degree of neutralization is controlled 50%,
The mixed solution that must be clarified；7.5g starch is weighed again to be added into above-mentioned mixed solution, after after starch dissolution, then mixed liquor is added
Enter to equipped with agitator, the there-necked flask of condenser pipe, heated in 40 DEG C of thermostat water baths；0.4g potassium peroxydisulfates are dissolved in again
Dissolved in suitable quantity of water, then by persulfate aqueous solution add there-necked flask in, react 30 minutes, to solution viscosity it is obvious on
Rise, color is creamy white；50g sludge is dispersed in water by after microwave disinfection sterilization, the moisture of non-dehydration state sludge is adjusted
The pH value of dispersion liquid is 5.0, then pours into there-necked flask the aqueous dispersions of non-dehydration state sludge, is reacted 2 hours, and solution becomes
Black, viscosity further increases, and becomes more viscous；0.04g crosslinking agents N, N '-methylene-bisacrylamide are dissolved in suitable quantity of water simultaneously
Add in there-necked flask, layering occurs in the stirring reaction at 40 DEG C, polymerisation 2 hours, solution, has been reacted after layering substantially
Entirely；During liquid after polymerization poured out into container, remaining material is put into vacuum drying chamber, is dried 3.5 hours at 80 DEG C
Non- dehydration state sludge high additive synthesis water-absorbing-retaining material is obtained.
Embodiment 4
In the case of ice-water bath, with the acrylic monomers in the NaOH of 14g with 18g, degree of neutralization is controlled 80%, obtained
The mixed solution of clarification；8.0g starch is weighed again to be added into above-mentioned mixed solution, after after starch dissolution, then mixed liquor is added
To equipped with agitator, the there-necked flask of condenser pipe, heated in 45 DEG C of thermostat water baths；0.5g potassium peroxydisulfates are dissolved in again suitable
Amount water in dissolved, then by persulfate aqueous solution add there-necked flask in, react 40 minutes, to solution viscosity it is obvious on
Rise, color is creamy white；45g sludge is dispersed in water by after microwave disinfection sterilization, the moisture of non-dehydration state sludge is adjusted
The pH value of dispersion liquid is 4.0, then pours into there-necked flask the aqueous dispersions of non-dehydration state sludge, is reacted 2.5 hours, and solution becomes
Black, viscosity further increases, and becomes more viscous；0.03g crosslinking agents N, N '-methylene-bisacrylamide are dissolved in suitable quantity of water simultaneously
Add in there-necked flask, layering occurs in the stirring reaction at 50 DEG C, polymerisation 2.5 hours, solution, is reacted after layering substantially
Completely；During liquid after polymerization poured out into container, remaining material is put into vacuum drying chamber, is dried 4 hours at 90 DEG C
Non- dehydration state sludge high additive synthesis water-absorbing-retaining material is obtained.
Embodiment 5
In the case of ice-water bath, with the acrylic monomers in the NaOH of 11g with 12g, degree of neutralization is controlled 85%, obtained
The mixed solution of clarification；9.0g starch is weighed again to be added into above-mentioned mixed solution, after after starch dissolution, then mixed liquor is added
To equipped with agitator, the there-necked flask of condenser pipe, heated in 50 DEG C of thermostat water baths；0.3g potassium peroxydisulfates are dissolved in again suitable
Amount water in dissolved, then by persulfate aqueous solution add there-necked flask in, react 35 minutes, to solution viscosity it is obvious on
Rise, color is creamy white；55g sludge is dispersed in water by after microwave disinfection sterilization, the moisture of non-dehydration state sludge is adjusted
The pH value of dispersion liquid is 6.0, then pours into there-necked flask the aqueous dispersions of non-dehydration state sludge, is reacted 2.3 hours, and solution becomes
Black, viscosity further increases, and becomes more viscous；0.05g crosslinking agents N, N '-methylene-bisacrylamide are dissolved in suitable quantity of water simultaneously
Add in there-necked flask, layering occurs in the stirring reaction at 45 DEG C, polymerisation 2.3 hours, solution, is reacted after layering substantially
Completely；During liquid after polymerization poured out into container, remaining material is put into vacuum drying chamber, is dried 4 hours at 85 DEG C
Non- dehydration state sludge high additive synthesis water-absorbing-retaining material is obtained.
The present invention is selected by specific formula design and processes parameter, preparation synthesize it is a kind of it is with low cost, have good
Compatible, environment-friendly a kind of non-dehydration state sludge high additive synthesis water-absorbing-retaining material.The sorbing material has larger
Water absorbent rate, the functional characteristic such as rate of water absorption and automatic degraded faster.
Claims (10)
1. a kind of non-dehydration state sludge high additive synthesizes the preparation method of water-absorbing-retaining material, it is characterised in that including following step
Suddenly：
Step one, with NaOH and acrylic monomers, the mixed solution clarified；
Step 2, then to starch additive is added in the mixed solution obtained by step one, make starch dissolution；
Step 3, then to adding potassium persulfate solution to be reacted in mixed solution, react sticky to solution, color is in milky white
Color；
Step 4, then to adding the aqueous dispersions of non-dehydration state sludge to be reacted in the mixed solution of step 3, reaction is to molten
Liquid blackening, viscosity of the viscosity higher than the solution of step 3；
Step 5, then to N is added in the mixed solution of step 5, the aqueous solution of N '-methylene-bisacrylamide be polymerized instead
Should, to solution layering；
Step 6, after the polymerisation of step 5 is complete, liquid is poured out, and remaining material carries out the non-dehydration state of drying
Sludge high additive synthesizes water-absorbing-retaining material.
2. a kind of non-dehydration state sludge high additive according to claim 1 synthesizes the preparation method of water-absorbing-retaining material, its
It is characterised by, in the step one to step 5, in terms of mass fraction, NaOH is 10-15 parts, acrylic monomers to each component
It is 10-20 parts, starch additive is 5-10 parts, potassium peroxydisulfate is 0.2-0.6 parts, non-dehydration state sludge is 40-60 parts, N, N '-
Methylene-bisacrylamide is 0.02-0.06 parts.
3. a kind of non-dehydration state sludge high additive according to claim 1 synthesizes the preparation method of water-absorbing-retaining material, its
It is characterised by, in the step one, under the conditions of ice-water bath, by NaOH and acrylic monomers, NaOH and third
The degree of neutralization of acrylic monomer is 50%-85%.
4. a kind of non-dehydration state sludge high additive according to claim 1 synthesizes the preparation method of water-absorbing-retaining material, its
It is characterised by, in the step 2, by mixed solution in 40 DEG C of -50 DEG C of heating water baths after starch dissolution.
5. a kind of non-dehydration state sludge high additive according to claim 1 synthesizes the preparation method of water-absorbing-retaining material, its
It is characterised by, adds potassium persulfate solution to react 30-40 minutes in the step 3, in solution.
6. a kind of non-dehydration state sludge high additive according to claim 1 synthesizes the preparation method of water-absorbing-retaining material, its
It is characterised by, in the step 4, the pH value of the aqueous dispersions of non-dehydration state sludge is 4-6, and the reaction time is 2-2.5 hours.
7. a kind of non-dehydration state sludge high additive according to claim 1 synthesizes the preparation method of water-absorbing-retaining material, its
It is characterised by, in the step 4, the aqueous dispersions of non-dehydration state sludge are obtained by the non-dehydration state sludge after sterilizing.
8. a kind of non-dehydration state sludge high additive according to claim 1 synthesizes the preparation method of water-absorbing-retaining material, its
It is characterised by, in the step 5, reaction temperature is 40-50 DEG C, and the reaction time is 2-2.5 hours, during the course of the reaction constantly
Stirring.
9. a kind of non-dehydration state sludge high additive according to claim 1 synthesizes the preparation method of water-absorbing-retaining material, its
It is characterised by, in the step 6, drying temperature is 80-90 DEG C, and the time is 3-4 hours.
10. a kind of non-dehydration state sludge high additive synthesizes water-absorbing-retaining material, it is characterised in that the non-dehydration state sludge is highly doped
Amount synthesis water-absorbing-retaining material is obtained by the preparation method of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611088155.0A CN106699990B (en) | 2016-11-30 | 2016-11-30 | The non-dehydration state sludge high additive synthesis water-absorbing-retaining material of one kind and preparation method |
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