CN105949409A - Polycarboxylate-series concrete water reducing agent containing chitosan, and preparation method thereof - Google Patents
Polycarboxylate-series concrete water reducing agent containing chitosan, and preparation method thereof Download PDFInfo
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- CN105949409A CN105949409A CN201610278138.7A CN201610278138A CN105949409A CN 105949409 A CN105949409 A CN 105949409A CN 201610278138 A CN201610278138 A CN 201610278138A CN 105949409 A CN105949409 A CN 105949409A
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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
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
- C08F283/065—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals on to unsaturated polyethers, polyoxymethylenes or polyacetals
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2688—Copolymers containing at least three different monomers
- C04B24/2694—Copolymers containing at least three different monomers containing polyether side chains
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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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
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- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Macromonomer-Based Addition Polymer (AREA)
Abstract
The invention provides a polycarboxylate-series concrete water reducing agent containing chitosan, and a preparation method thereof. The concrete water reducing agent is a polymerization product. By mass, the polycarboxylate-series concrete water reducing agent containing chitosan is obtained through a polymerization reaction of the following raw materials: 0.02-12.6% of chitosan, 4-65% of polyoxyalkylene ether unsaturated macromonomer and polyoxyalkylene ester unsaturated macromonomer, 1-38% of unsaturated carboxylic acid and/or unsaturated anhydride, 0.02-8% of unsaturated carboxylic acid derivative and/or unsaturated ether, and 25-94% of water. The preparation method is simple, and has low production cost. The produced water reducing agent has high water reducing rate, and assists in significantly ameliorating concrete vulnerability to segregation and bleeding. With the water reducing agent, concrete workability is good. Also, concrete slump loss through time can be effectively reduced, and good fluidity of concrete is maintained. The water reducing agent also has significant effect in concrete strength increase.
Description
[technical field]
The present invention relates to building material technical field, be specifically related to the polycarboxylic-acid coagulation of a kind of chitosan-containing
Soil water reducer and preparation method thereof.
[background technology]
Water reducer use in concrete, can significantly improve the service behaviour of concrete, improve concrete
Intensity and durability.Polycarboxylate high performance water-reducing agent be continue with wood the calcium ordinary water-reducing agent as representative and
The water reducer of new generation grown up after high efficiency water reducing agent with naphthalene system as representative, has low-dosage high score
Dissipate, the particular advantages such as high water reducing rate and environmental protection, be forefront, the world today, excellent combination property also
The class cement water reducing agent being widely used.
In recent years, development based on concrete technology, the market competition, cost control and commodity coagulation
In soil, the consumption of Binder Materials reduces and the impact of degradation factor under quality, single poly carboxylic acid series water reducer
Be difficult to meet the cohesiveness of ready-mixed concrete and water-retaining property requirement, cause concrete mix generation bleeding,
Isolation, workability is deteriorated and slump-loss is bigger.For ensureing concrete normal construction, improving work effect
Rate, then must compound use thickening, protect the component that collapses, but research and practice all find, polycarboxylic-acid diminishing
The compatibility that agent and the most conventional thickening and guarantor are collapsed between component is poor, and it is inefficient that thickening agent uses,
This thickening type being poly carboxylic acid series water reducer compounds work and brings great difficulty, makes production technology become more
For complexity；Additionally, the synthesis technique of poly carboxylic acid series water reducer currently on the market, mainly by polyoxyalkylene
Base ethers unsaturation polymeric monomer and/or polyoxyalkylenes esters unsaturation polymeric monomer, unsaturated carboxylic acid and/or
Unsaturated acid anhydride, the petroleum base monomer such as olefinically unsaturated carboxylic acid derivatives and/or unsaturated ethers is through addition polymerization
The product that reaction obtains, the increasingly exhausted of petroleum resources will make the petrochemical industry row with petroleum base monomer as raw material
Industry is hard to carry on.Marine material chitosan introducing poly carboxylic acid series water reducer at home and abroad be there is not yet report
Road.
[summary of the invention]
One of the technical problem to be solved in the present invention, is to provide the polycarboxylic-acid coagulation of a kind of chitosan-containing
Soil water reducer, this water reducer not only water-reducing rate is high, and can be obviously improved concrete easily isolate, bleeding existing
As so that the workability of concrete is good, and can reduce the gradual loss of concrete, keeps the stream that it is good
Dynamic performance, and notable to the later strength growth effect of concrete.
The present invention is realized in one of above-mentioned technical problem:
The polycarboxylic acid series water reducing agent of a kind of chitosan-containing, described cement water reducing agent produces for polymerization
Thing, by percentage to the quality, the described polycarboxylic acid series water reducing agent containing chitosan is by following raw material
The aggregated reaction of component obtains:
Chitosan 0.02～12.6%, polyoxyalkylenes ethers unsaturation polymeric monomer and polyoxyalkylenes esters
Unsaturated polymeric monomer 4～65%, unsaturated carboxylic acid and/or unsaturated acid anhydride 1～38%, unsaturated carboxylic acid spreads out
Biology and/or unsaturated ethers 0.02～8%, water 25～94%；
Described polyoxyalkylenes ethers unsaturation polymeric monomer is allyl polyethenoxy ether, and methacrylic gathers
Oxygen vinyl Ether, isopentenol polyoxyethylene ether, at least one in isobutene alcohol polyoxyethylene ether, described
Polyoxyalkylenes esters unsaturation polymeric monomer is single polyalkylene glycol acrylate ester, the poly-second of monomethacrylate two
Alcohol ester, mono methoxy ether list polyalkylene glycol acrylate ester, mono methoxy ether monomethacrylate acid polyethylene glycol
At least one in ester；
Described unsaturated carboxylic acid is acrylic acid, methacrylic acid, at least one in maleic acid, described not
Saturated anhydride is acrylic anhydride, methacrylic anhydride, at least one in maleic anhydride；
Described olefinically unsaturated carboxylic acid derivatives is expressed as by structural formula:
Wherein X1For H or CH3；M, n, p are integers；
Described unsaturated ethers is expressed as by structural formula:
Wherein X1For H or CH3；M1, n1, p1 are integers.
Further, the degree of deacetylation of described chitosan is higher than 60%.
Further, described polyoxyalkylenes ethers unsaturation polymeric monomer and polyoxyalkylenes esters are unsaturated
Number-average molecular weight M of polymeric monomernIt is 300～12000.
Further, described polyoxyalkylenes ethers unsaturation polymeric monomer and polyoxyalkylenes esters are unsaturated
Number-average molecular weight M of polymeric monomernIt is 400～8000.
The two of the technical problem to be solved in the present invention, are to provide the polycarboxylic-acid coagulation of a kind of chitosan-containing
The preparation method of soil water reducer, this preparation method is simple, and production cost is relatively low, and the water reducer produced is not
Only water-reducing rate is high, and can be obviously improved concrete easily isolate, excreting water phenomenon so that concrete and easily
Property is good, and can effectively reduce the slump-loss of concrete, keeps the mobility that it is good, and to coagulation
It is notable that the later strength of soil increases effect.
The present invention is realized in the twos' of above-mentioned technical problem:
The preparation method of the polycarboxylic acid series water reducing agent of a kind of chitosan-containing, according to following percent mass
The raw material dosage scope of ratio weighs each component: chitosan 0.02～12.6%, polyoxyalkylenes ethers insatiable hunger
With polymeric monomer and polyoxyalkylenes esters unsaturation polymeric monomer 4～65%, unsaturated carboxylic acid and/or unsaturation
Anhydride 1～38%, olefinically unsaturated carboxylic acid derivatives and/or unsaturated ethers 0.02～8%, water 25～94%；By upper
State each component fully to dissolve, at a temperature of 0～80 DEG C with oxidation-reduction system by above-mentioned each component molten
Causing polymerization in liquid, resulting polymers solution is i.e. the polycarboxylic acid series water reducing agent of chitosan-containing；
Described polyoxyalkylenes ethers unsaturation polymeric monomer is allyl polyethenoxy ether, and methacrylic gathers
Oxygen vinyl Ether, isopentenol polyoxyethylene ether, at least one in isobutene alcohol polyoxyethylene ether, described
Polyoxyalkylenes esters unsaturation polymeric monomer is single polyalkylene glycol acrylate ester, the poly-second of monomethacrylate two
Alcohol ester, mono methoxy ether list polyalkylene glycol acrylate ester, mono methoxy ether monomethacrylate acid polyethylene glycol
At least one in ester；
Described unsaturated carboxylic acid is acrylic acid, methacrylic acid, at least one in maleic acid, described not
Saturated anhydride is acrylic anhydride, methacrylic anhydride, at least one in maleic anhydride；
Described olefinically unsaturated carboxylic acid derivatives is expressed as by structural formula:
Wherein X1For H or CH3；M, n, p are integers；
Described unsaturated ethers is expressed as by structural formula:
Wherein X1For H or CH3；M1, n1, p1 are integers.
Further, described oxidation-reduction trigger system is Ammonium persulfate., potassium peroxydisulfate, sodium peroxydisulfate,
Azodiisobutyronitrile, hydrogen peroxide, two periodic acids close copper (III) potassium, peracetic acid, sulfurous acid ferrum, mercapto
Guanidine-acetic acid, sodium sulfite, Fenton reagent, sodium sulfide, benzoyl peroxide, NaHS, sulfuration
Potassium, potassium bisulfide, ascorbic acid, ammonium ceric nitrate, Ferrous ammonium sulfate, ferrous sulfate, Cericammoniumsulfate,
Mercaptopropionic acid, ethylenediamine, ethylenediaminetetraacetic acid, N, N, N ', N '-tetramethylethylenediamine, dodecyl sulfur
Alcohol, at least one in hexadecyl mercaptan.
Further, the consumption of described oxidization-reduction type initiator system is that described cement water reducing agent is always used
The 0.01～15% of amount.
Further, the degree of deacetylation of described chitosan is higher than 60%.
Further, described polyoxyalkylenes ethers unsaturation polymeric monomer and polyoxyalkylenes esters are unsaturated
Number-average molecular weight M of polymeric monomernIt is 300～12000.
Further, described polyoxyalkylenes ethers unsaturation polymeric monomer and polyoxyalkylenes esters are unsaturated
Number-average molecular weight M of polymeric monomernIt is 400～8000.
Present invention have the advantage that
The structure of polymer is regulated and controled by the present invention, and marine material chitosan introduces polyreaction synthesis
Poly carboxylic acid series water reducer, introduces non-petroleum base raw material, described water reducer in poly carboxylic acid series water reducer
Synthesis technique simple, pollution-free, production cost is relatively low；Obtained water reducer not only water-reducing rate is high,
And can be obviously improved concrete easily isolate, excreting water phenomenon so that the workability of concrete is good, and can have
Effect reduces the slump-loss of concrete mix, keeps the mobile performance that it is good, and to concrete
Gain in strength effect is notable.
[detailed description of the invention]
Below in conjunction with specific embodiment, the present invention is further illustrated.
Embodiment 1: by 66g chitosan, 650g isopentenol polyoxyethylene ether (Mn=2400), 380g
Mono methoxy ether list acrylic ester (Mn=1200), unsaturated monocarboxylic acid acrylic acid 125g,
Olefinically unsaturated carboxylic acid derivatives 35g is under agitation dissolved in 4.5kg water, treats that it forms homogeneous monomer mixing
Solution, preheats reaction system and controls temperature within the scope of 30-80 DEG C, then by 12g cerous sulfate
Ammonium and 16.9g hydrogen peroxide are dissolved in 30g water respectively, and TGA 20.1g instills single after being dissolved in 100g water
In body mixed liquor, and the compound controlling to be introduced into dripped complete in 30～80 minutes, then proceeded to anti-
Answer 20～50 minutes, product is cooled down, i.e. obtains the poly carboxylic acid series concrete diminishing containing chitosan
Agent.
Embodiment 2: 104g water is preheated to 40 DEG C, the most under agitation adds 32g prenol and gathers
Oxygen vinyl Ether polymeric monomer (Mn=2400), 60g Methylacrylic Acid Polyoxyethylene Ester (Mn=700) and 1.86g
Chitosan, after thing solution mixed above forms transparence thickness mixed solution；Weigh 1.6g unsaturated
Carboxylic acid derivates, 16.5g acrylic acid and 2.6g maleic anhydride are added dropwise to reaction system after mixing with 30g water；
Weigh mercaptopropionic acid 0.8g and be dissolved in 10g water；2.3g ammonium ceric nitrate, 1.8g ascorbic acid is dissolved in 15g water
In middle instillation reaction system；The Ammonium persulfate. of 0.9g is dissolved in 10g water in introducing polymerization system simultaneously,
Control temperature less than 65 DEG C, the response time less than 2h, the aqueous solution of gained polymerizate is cooled down,
I.e. obtain the polycarboxylic acid series water reducing agent containing chitosan.
Embodiment 3: 205g water is preheated to 40 DEG C, puts into 120g allyl alcohol polyethenoxy ether wherein
Polymeric monomer (Mn=2000), 80g methoxy acrylic acid polyoxyethylene ester (Mn=2000), 6g metering system
After acid and 2.3g chitosan, stirring is allowed to be completely dissolved, and is then sequentially added into unsaturated ethers 4g and unsaturation
After carboxylic acid derivates 1.4g, by 6.8g TGA, 2.8g ammonium ceric nitrate, 2.1g ascorbic acid, 3.2g
Hydrogen peroxide and 55g acrylic acid are dissolved in 15g water respectively, and drip complete in 30-60 minute, control
Temperature processed less than 70 DEG C, the response time less than 2h, gained polymerizate is cooled down, is i.e. contained
There is the polycarboxylic acid series water reducing agent of chitosan.
Embodiment 4: by 80g monomethacrylate macrogol ester (Mn=1400), 5g prenol gathers
Oxygen vinyl Ether (Mn=2400), 2.8g chitosan, 16.5g acrylic acid, and the undersaturated methyl-prop of 3.5g
Olefin(e) acid is derived under thing stirring and is dissolved in 300g water, after it is complete, 6.9g ammonium ceric nitrate is dissolved in 12g
Water, 1.5 ascorbic acid and 2.5g mercaptopropionic acid are dissolved in 15g water, after hydrogen peroxide 1.6g is dissolved in 10g water
It is respectively dropped in gained mixed solution and starts reaction, the temperature of reaction system is controlled 0-80 DEG C of scope
In, and dripped complete in 30～90 minutes, cool down gained reaction after continuing reaction 20～80 minutes and produce
Thing, i.e. obtains the polycarboxylic acid series water reducing agent containing chitosan.
Embodiment 5: by 19.4g acrylic acid, 60g allyl alcohol polyethenoxy ether polymeric monomer (Mn=2400),
It is dissolved in 300g water dissolving with 2.17g chitosan and forms mixed solution a, then by 1.3g cetyl
Mercaptan and 10.6g hydrogen peroxide are dissolved in 15g water formation solution b, and 5.5g ascorbic acid is dissolved in 15g
Water is formed solution c, ammonium ceric nitrate 5.4g and is dissolved in 18g water composition solution d, then by solution a, b,
C, d are added dropwise to by 130g mono methoxy polyethylene glycol mono acrylic ester (Mn=2400), 13g methyl-prop
In the mixed solution of olefin(e) acid, 1.55g unsaturated ethers and 180g water composition, preheat and control temperature and exist
In the range of 30-70 DEG C, by solution a, after b, c, d dripped in 30-90 minute, continue reaction
Cool down product after 10～120 minutes, i.e. obtain the polycarboxylic acid series water reducing agent containing chitosan.
Embodiment 6: by 20g isopentenol polyoxyethylene ether (Mn=2400), 5.8g mono methoxy list third
Olefin(e) acid macrogol ester (Mn=1200), 0.9g chitosan, 6.2g acrylic acid and the mixing of 2.1 unsaturated ethers
Rear addition 36g water, after heating is allowed to dissolve completely；By 1.2g mercaptopropionic acid, 1.2g ascorbic acid,
3.3g Cericammoniumsulfate, 1.2g hydrogen peroxide, 6.2g acrylic acid are dissolved in respectively in 6g water and divide at 30-60
The monomer mixed solution that clockwise gained is homogeneous drips complete, control temperature less than 80 DEG C, response time
Less than 2h, the aqueous solution of gained polymerizate is cooled down, i.e. obtains the polycarboxylic-acid containing chitosan
Cement water reducing agent.
The structure of polymer is regulated and controled by the present invention, chitosan is introduced polyreaction and has synthesized polycarboxylic acids
Based water reducer, introduces non-petroleum base raw material in poly carboxylic acid series water reducer, the synthesis work of described water reducer
Skill is simple, pollution-free, and production cost is relatively low；Obtained water reducer not only water-reducing rate is high, and can be bright
Aobvious improve concrete easily isolate, excreting water phenomenon so that the workability of concrete is good, and coagulation can be reduced
The slump-loss of soil, keeps the mobility of concrete, and notable to the gain in strength effect of concrete.
Although the foregoing describing the detailed description of the invention of the present invention, but it is familiar with the technology people of the art
Member should be appreciated that our described specific embodiment is merely exemplary rather than for this
The restriction of bright scope, those of ordinary skill in the art are in the equivalence made according to the spirit of the present invention
Modify and change, all should contain in the scope of the claimed protection of the present invention.
Claims (10)
1. the polycarboxylic acid series water reducing agent of a chitosan-containing, it is characterised in that: described concrete
Water reducer is polymerizate, and by percentage to the quality, the described poly carboxylic acid series concrete containing chitosan subtracts
Water preparation is obtained by the aggregated reaction of following raw material components:
Chitosan 0.02～12.6%, polyoxyalkylenes ethers unsaturation polymeric monomer and polyoxyalkylenes esters
Unsaturated polymeric monomer 4～65%, unsaturated carboxylic acid and/or unsaturated acid anhydride 1～38%, unsaturated carboxylic acid spreads out
Biology and/or unsaturated ethers 0.02～8%, water 25～94%；
Described polyoxyalkylenes ethers unsaturation polymeric monomer is allyl polyethenoxy ether, and methacrylic gathers
Oxygen vinyl Ether, isopentenol polyoxyethylene ether, at least one in isobutene alcohol polyoxyethylene ether；Described
Polyoxyalkylenes esters unsaturation polymeric monomer is single polyalkylene glycol acrylate ester, the poly-second of monomethacrylate two
Alcohol ester, mono methoxy ether list polyalkylene glycol acrylate ester, mono methoxy ether monomethacrylate acid polyethylene glycol
At least one in ester；
Described unsaturated carboxylic acid is acrylic acid, methacrylic acid, at least one in maleic acid, described not
Saturated anhydride is acrylic anhydride, methacrylic anhydride, at least one in maleic anhydride；
Described olefinically unsaturated carboxylic acid derivatives is expressed as by structural formula:
Wherein X1For H or CH3；M, n, p are integers；
Described unsaturated ethers is expressed as by structural formula:
Wherein X1For H or CH3；M1, n1, p1 are integers.
The polycarboxylic acid series water reducing agent of a kind of chitosan-containing the most according to claim 1, its
It is characterised by: the degree of deacetylation of described chitosan is higher than 60%.
The polycarboxylic acid series water reducing agent of chitosan-containing the most according to claim 1, its feature
It is: described polyoxyalkylenes ethers unsaturation polymeric monomer and polyoxyalkylenes esters unsaturation polymeric monomer
Number-average molecular weight MnIt is 300～12000.
The polycarboxylic acid series water reducing agent of a kind of chitosan-containing the most according to claim 3, its
It is characterised by: described polyoxyalkylenes ethers unsaturation polymeric monomer and polyoxyalkylenes esters are unsaturated big single
Number-average molecular weight M of bodynIt is 400～8000.
5. the preparation method of the polycarboxylic acid series water reducing agent of a chitosan-containing, it is characterised in that:
Each component is weighed: chitosan 0.02～12.6% according to the raw material dosage scope of following mass percent, poly-
Oxyalkylene group ethers unsaturation polymeric monomer and polyoxyalkylenes esters unsaturation polymeric monomer 4～65%, insatiable hunger
With carboxylic acid and/or unsaturated acid anhydride 1～38%, olefinically unsaturated carboxylic acid derivatives and/or unsaturated ethers 0.02～8%,
Water 25～94%；Above-mentioned each component is fully dissolved, with oxidation-reduction system at a temperature of 0～80 DEG C
Above-mentioned each component is caused polymerization, resulting polymers solution in the solution is i.e. the polycarboxylic-acid of chitosan-containing
Cement water reducing agent；
Described polyoxyalkylenes ethers unsaturation polymeric monomer is allyl polyethenoxy ether, and methacrylic gathers
Oxygen vinyl Ether, isopentenol polyoxyethylene ether, at least one in isobutene alcohol polyoxyethylene ether, described
Polyoxyalkylenes esters unsaturation polymeric monomer is single polyalkylene glycol acrylate ester, the poly-second of monomethacrylate two
Alcohol ester, mono methoxy ether list polyalkylene glycol acrylate ester, mono methoxy ether monomethacrylate acid polyethylene glycol
At least one in ester；
Described unsaturated carboxylic acid is acrylic acid, methacrylic acid, at least one in maleic acid, described not
Saturated anhydride is acrylic anhydride, methacrylic anhydride, at least one in maleic anhydride；
Described olefinically unsaturated carboxylic acid derivatives is expressed as by structural formula:
Wherein X1For H or CH3；M, n, p are integers；
Described unsaturated ethers is expressed as by structural formula:
Wherein X1For H or CH3；M1, n1, p1 are integers.
The system of the polycarboxylic acid series water reducing agent of a kind of chitosan-containing the most according to claim 5
Preparation Method, it is characterised in that: described oxidation-reduction trigger system is Ammonium persulfate., potassium peroxydisulfate, mistake
Sodium sulfate, azodiisobutyronitrile, hydrogen peroxide, two periodic acids close copper (III) potassium, peracetic acid, sulfurous
Acid ferrum, TGA, sodium sulfite, Fenton reagent, sodium sulfide, benzoyl peroxide, sulfur hydrogenates
Sodium, Potassium monosulfide., potassium bisulfide, ascorbic acid, ammonium ceric nitrate, Ferrous ammonium sulfate, ferrous sulfate, sulfur
Acid cerium ammonium, mercaptopropionic acid, ethylenediamine, ethylenediaminetetraacetic acid, N, N, N ', N '-tetramethylethylenediamine, ten
Dialkyl group mercaptan, at least one in hexadecyl mercaptan.
The system of the polycarboxylic acid series water reducing agent of a kind of chitosan-containing the most according to claim 5
Preparation Method, it is characterised in that: the consumption of described oxidization-reduction type initiator system is described concrete diminishing
The 0.01～15% of the total consumption of agent.
The system of the polycarboxylic acid series water reducing agent of a kind of chitosan-containing the most according to claim 5
Preparation Method, it is characterised in that: the degree of deacetylation of described chitosan is higher than 60%.
The system of the polycarboxylic acid series water reducing agent of a kind of chitosan-containing the most according to claim 5
Preparation Method, it is characterised in that: described polyoxyalkylenes ethers unsaturation polymeric monomer and polyoxyalkylenes esters
Number-average molecular weight M of unsaturated polymeric monomernIt is 300～12000.
The system of the polycarboxylic acid series water reducing agent of a kind of chitosan-containing the most according to claim 9
Preparation Method, it is characterised in that: described polyoxyalkylenes ethers unsaturation polymeric monomer and polyoxyalkylenes esters
Number-average molecular weight M of unsaturated polymeric monomernIt is 400～8000.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107117855A (en) * | 2017-04-23 | 2017-09-01 | 郑州科技学院 | A kind of polycarboxylic acid series water reducing agent and preparation method thereof |
| CN107189078A (en) * | 2017-04-07 | 2017-09-22 | 华侨大学 | Promote the instant method of crystallinity polyoxyethylene based polyalcohol under a kind of low temperature |
| CN108383956A (en) * | 2018-01-26 | 2018-08-10 | 华侨大学 | A kind of poly carboxylic acid series water reducer and preparation method thereof containing chitosan |
| CN109095814A (en) * | 2018-05-30 | 2018-12-28 | 江苏百瑞吉新材料有限公司 | A kind of rust-proof type poly carboxylic acid series water reducer and preparation method thereof |
| CN113402233A (en) * | 2021-07-23 | 2021-09-17 | 中国电建集团四川工程有限公司 | Large-volume concrete, preparation method and construction process thereof |
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