CN105859959A - Preparation method of cationic suspension stabilizer of papermaking titanium dioxide - Google Patents
Preparation method of cationic suspension stabilizer of papermaking titanium dioxide Download PDFInfo
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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
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/34—Esters containing nitrogen, e.g. N,N-dimethylaminoethyl (meth)acrylate
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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
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/28—Emulsion polymerisation with the aid of emulsifying agents cationic
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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
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/30—Emulsion polymerisation with the aid of emulsifying agents non-ionic
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
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Abstract
The invention discloses a preparation method of a cationic suspension stabilizer of papermaking titanium dioxide, belonging to the technical field of a suspension stabilizer of papermaking titanium dioxide. The method comprises the following steps: (A) controlling the temperature of water bath to 75-85 DEG C, and fetching methacryloyloxyethyl trimethyl ammonium chloride, hydroxy-propyl acrylate and styrene in a mass ratio of 3:1:1 for later use; (B) fetching a chain transfer agent and an emulsifier and adding together with the standby materials fetched in the step (A) into a container with water, and stirring uniformly; and (C) preparing an aqueous solution of ammonium persulfate with solid content of 2-4%, dropwise adding the aqueous solution of ammonium persulfate into the container of the step (B), and preserving heat for 2-3h to obtain a cationic suspension stabilizer with solid content of 15-25%. By adopting the suspension stabilizer produced by the preparation method, titanium dioxide can be perfectly dispersed in a waterborne system, the non-transparency and whiteness of paper are improved, the printing is facilitated without penetration, and the retention rate of titanium dioxide in the paper sheets can be increased.
Description
Technical field
The invention belongs to the suspension stabilizer technical field of titanium dioxide for papermaking, relate to papermaking titanium dioxide
The preparation method of cationic suspension stabilizer, specifically one can not only make titanium dioxide effective
Ground is well disperseed in water-based system, improves opacity and the whiteness of paper, and permissible
Improve the preparation method of the cationic suspension stabilizer of titanium dioxide retention in page.
Background technology
At present, the divided titanium dioxide powder that domestic most titanium white production producer uses, namely suspending stabilized
Agent is sodium hexameta phosphate monoethanolamine mixed liquor and sodium hexameta phosphate triethanolamine mixed liquor,
The effect of these dispersants is pretty good.But applied in field of papermaking, the poorest compared with international standard
Away from bigger.In order to reduce this gap, we have carried out the research of inorganic particle suspension stabilizer, send out
Existing；(1) domestic powder body dispersant mostly is anionic polymer suspension stabilizer.Wherein, cloudy from
Subtype polymer suspension stabilizer is many based on polyacrylic acid or polyol copolymer.(2) poly-
Acrylic compounds water solublity suspension stabilizer has good dispersion effect, be the most applied to water-coal-slurry,
The dispersion of the inorganic minerals such as pottery, aluminium oxide and calcium carbonate.(3) Liu pays victory acute hearing, and Tang Liming have studied
Polyacrylic acid and polyacrylate absorption behavior on titanium dioxide granule, Ma Lizhi by polyacrylic acid and
Polyacrylic acid/acrylic acid methyl ester. is applied to the dispersion of titanium dioxide, Kaolin and calcium carbonate.But polypropylene
Acids suspension stabilizer is but prone at titanium dioxide surface desorption, reduces dispersion effect.Visible, polypropylene
Acids suspension stabilizer is unworkable as this road of suspension stabilizer of papermaking titanium dioxide, it would be desirable to another
Ward off new footpath.
Summary of the invention
In order to seek one, that titanium dioxide can be made effectively to obtain in water-based system is good scattered outstanding
Floating stabilizer, we devise the preparation method of the cationic suspension stabilizer of papermaking titanium dioxide, sharp
The suspension stabilizer produced by this preparation method can not only make titanium dioxide effectively obtain in water-based system
To well dispersion, improve opacity and the whiteness of paper, it is simple to print and do not penetrate through；And can
To improve titanium dioxide retention in page.
The technical solution used in the present invention is: the preparation of the cationic suspension stabilizer of papermaking titanium dioxide
Method, it is critical only that: this preparation method step includes:
A, control bath temperature are 75-85 DEG C, are that 3:1:1 takes methacryl by quality proportion relation
Oxy-ethyl-trimethyl salmiac, Hydroxypropyl acrylate, styrene, standby；
B, take chain-transferring agent, standby material that emulsifying agent and step A are taken joins the appearance filling water
Being stirred until homogeneous in device, wherein, the quality of chain-transferring agent is the standby material gross mass that step A takes
2～4%, the 1～2% of the standby material gross mass that the quality of emulsifying agent is taken by step A；
C, configuration solid content are the aqueous solution of Ammonium persulfate. of 2～4%, then water-soluble by this Ammonium persulfate.
Drop adds in the container described in step B, be incubated 2-3h, obtain solid content be 15～25% sun from
Subtype suspension stabilizer, wherein the quality of the aqueous solution of Ammonium persulfate. is that the standby material that step A takes is total
The 1～2% of quality.
Chain-transferring agent described in step B is sodium hypophosphite.
Emulsifying agent described in step B is hexadecyltrimethylammonium chloride, tween 80 or Arlacel-80
In one or both and more than.
The solid content of the aqueous solution of the Ammonium persulfate. described in step C is 3%.
In step C, the dropping mode of the aqueous solution of Ammonium persulfate. is: with Dropping funnel in 0.5～1h by
Drip.
The quality of step B Chain transfer agent is the standby material gross mass 3% that step A takes.
The 1.2% of the standby material gross mass that in step B, the quality of emulsifying agent is taken by step A.
In step C, the quality of the aqueous solution of Ammonium persulfate. is the standby material gross mass that step A takes
1.5%.
The solid content of the cationic suspension stabilizer described in step C is 15～25%.
Container described in step B is the there-necked flask filling distilled water.
The beneficial effects of the present invention is: 1, utilize papermaking titanium white prepared by radical polymerization of the present invention
Powder cation suspension stabilizer, is surveyed by performances such as nano particle size potentiometer, scanning electron microscope, microscopes
Examination, shows that the polymer of preparation is to titanium dioxide dispersion suspension stability and staying in paper in water
Rate effect obvious.2, with MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride (DMC), styrene (St)
With Hydroxypropyl acrylate (HPA) be the cation type polymer suspension stabilizer DHS for preparing of monomer not only
Titanium dioxide can be made effectively well to be disperseed in water-based system, improve the opacity of paper
And whiteness, it is simple to print and do not penetrate through.
Accompanying drawing explanation
Fig. 1 is the impact on titanium dioxide surface zeta potential current potential of the St consumption；
Fig. 2 is the impact on titanium dioxide surface zeta potential current potential of the DMC consumption；
Fig. 3 is the impact on titanium dioxide surface zeta potential current potential of the DHS consumption；
Fig. 4 is with the suspended state in water of titanium dioxide during suspension stabilizer；
Titanium dioxide suspended state in water when Fig. 5 is to add suspension stabilizer 0.34%；
Fig. 6 is that different DHS addition is on titanium dioxide impact of suspension stability in water；
Fig. 7 is that different styrene consumption suspension stabilizer is to titanium dioxide shadow of suspension stability in water
Ring；
When Fig. 8 is for being not added with DHS, titanium dioxide SEM schemes；
Titanium dioxide SEM figure when Fig. 9 is for adding DHS.
Detailed description of the invention
With embodiment, the present invention is described in detail below.
The selection of raw material is as follows:
MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride (DMC) technical grade Wuxi Xinyu Chemical Co., Ltd.
Styrene (St) analytical pure Tianjin Tian Li chemical reagent company limited
Hydroxypropyl acrylate (HPA) analytical pure Tianjin Tian Li chemical reagent company limited
Sodium hypophosphite analytical pure Tianjin Tian Li chemical reagent company limited
Ammonium persulfate. (APS) analytical pure Tianjin Hedong District red rock chemical reagent work
Tween 80 (Tween-80) analytical pure Tianjin Tian Li chemical reagent company limited
Arlacel-80 (Span-80) analytical pure Tianjin Tian Li chemical reagent company limited
Hexadecyltrimethylammonium chloride (1631) analytical pure Chemical Reagent Co., Ltd., Sinopharm Group
Rutile type titanium dioxide (R217) center Hua Yuantai industry company
Utilize above-mentioned raw materials, the suspension stabilizer needed for preparing with example below:
Under embodiment 1:80 DEG C bath temperature, by MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride DMC,
Hydroxypropyl acrylate HPA, styrene St (ratio is 3:1:1), sodium hypophosphite, cetyl three
Ammonio methacrylate, tween 80, Arlacel-80 join in the distilled water in there-necked flask, are sufficiently stirred for all
Even.Solid content is that the aqueous solution of the Ammonium persulfate. of 3% is added dropwise to three by Dropping funnel about 1h
In mouth bottle, initiator and chain-transferring agent account for monomer gross mass 1.5% and about 3%, emulsifying agent respectively
All account for total monomer quality 1.2%, be incubated about 2.5h, obtain solid content and be about the white of 20% blueing light
Color emulsion form cationic terpolymers (DHS) suspension stabilizer.
Under embodiment 2:75 DEG C bath temperature, by MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride DMC,
Hydroxypropyl acrylate HPA, styrene St (ratio is 3:1:1), sodium hypophosphite, cetyl three
Ammonio methacrylate, tween 80, Arlacel-80 join in the distilled water in there-necked flask, are sufficiently stirred for all
Even.Solid content is that the aqueous solution of the Ammonium persulfate. of 2% is added dropwise to by Dropping funnel about 0.6h
In there-necked flask, initiator and chain-transferring agent account for monomer gross mass 1% and about 2%, emulsifying agent respectively
All account for total monomer quality 1%, be incubated about 2h, obtain solid content and be about the white breast of 15% blueing light
Aqueous cationic terpolymers (DHS) suspension stabilizer.
Under embodiment 3:85 DEG C bath temperature, by MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride DMC,
Hydroxypropyl acrylate HPA, styrene St (ratio is 3:1:1), sodium hypophosphite, cetyl three
Ammonio methacrylate, tween 80, Arlacel-80 join in the distilled water in there-necked flask, are sufficiently stirred for all
Even.Solid content is that the aqueous solution of the Ammonium persulfate. of 4% is added dropwise to by Dropping funnel about 0.7h
In there-necked flask, initiator and chain-transferring agent account for monomer gross mass 2% and about 4%, emulsifying agent respectively
All account for total monomer quality 2%, be incubated about 3h, obtain solid content and be about the white breast of 25% blueing light
Aqueous cationic terpolymers (DHS) suspension stabilizer.
Under embodiment 4:83 DEG C bath temperature, by MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride DMC,
Hydroxypropyl acrylate HPA, styrene St (ratio is 3:1:1), sodium hypophosphite, cetyl three
Ammonio methacrylate, tween 80, Arlacel-80 join in the distilled water in there-necked flask, are sufficiently stirred for all
Even.Solid content is that the aqueous solution of the Ammonium persulfate. of 3.5% is added dropwise over by Dropping funnel about 0.8h
In there-necked flask, initiator and chain-transferring agent account for monomer gross mass 1.8% and about 3.5% respectively,
Emulsifying agent all accounts for total monomer quality 1.8%, is incubated about 2.8h, obtains solid content and is about 18% blueing
White emulsion shape cationic terpolymers (DHS) suspension stabilizer of light.
Below we inquire into embodiment 1 mode prepare by methylacryoyloxyethyl trimethyl ammonia chloride
Ammonium (DMC), styrene (St) and the cation type polymer that Hydroxypropyl acrylate (HPA) is monomer hang
Float the primary raw material in stabilizer DHS and functional monomer to titanium dioxide suspending stabilized performance in water
Impact.
Experimental design is as follows:
(1) experimental apparatus and equipment
Bruker company of Fourier infrared spectrograph (FTIR) VECTOR-22 Germany
Bruker company of proton nmr spectra (1H-NMR) AVANCE-400MHz Germany
Nano particle size surface potential analyser Zetasizer NANO-ZS90 D/max2200PC Britain
Malvern company
Field emission scanning electron microscope S4800 Rigaku company Rigaku
TA company of the thermal gravimetric analyzer Q500 U.S.
Digital liquid crystal biological microscope DMS-653 Shenzhen Bo Yu Instrument Ltd.
Chromatograph of gel permeation G02515-911M Waters, US
Muffle furnace SX-2-5-12 Shanghai Lei Yun test apparatus Manufacturing Co., Ltd
Digital viscometer instrument DV-3 PRO Shanghai Nirun Intelligent Technology Co., Ltd.
Electronic balance PB2002-N type Shanghai Mettler-Tolteo group
(2) under suspension stabilizer effect, titanium dioxide application performance characterizes
(1) particle surface zeta potential test
Prepare 0.5% Titanium dioxide slurry with distilled water, add the cation prepared by embodiment 1 and suspend steady
Determine agent, separate with centrifuge again after being sufficiently stirred for, take the supernatant, use supersonic oscillations
About 10min, tests addition cation at normal temperatures and suspends steady with nano particle size surface potential analyser
Determine the zeta current potential on titanium dioxide surface during agent.
(2) high power microscope test
Prepare Titanium dioxide slurry with distilled water, add cation suspension stabilizer, with distilled water diluting extremely
Ten thousand/left and right, the liquid after being diluted is all at DMS-653 type number liquid crystal biological microscope
Lower amplification 100 times, observes titanium dioxide dispersity in water.
(3) suspension stability test
Prepare 0.5% Titanium dioxide slurry with distilled water, add cation suspension stabilizer, several days standing,
Observe titanium dioxide suspension stability in water when adding cation suspension stabilizer, and shoot with camera.
(4) SEM test
Prepare 0.5% Titanium dioxide slurry with distilled water, add cation suspension stabilizer, after drying, in
Conducting resinl is coated on surface, observes the form of titanium dioxide granule when adding cation suspension stabilizer.
(5) viscosity test
Prepare the Titanium dioxide slurry of 30% Titanium dioxide slurry and about 0.5% with water, add cation and hang
Floating stabilizer, find two kinds of slurry viscosities almost without change, so do not discuss its viscosity B coefficent at this.
(6) retention test
Take a certain amount of Plant fiber 3g, add tap water, make the slurry that pulp content is 2%,
And by slurry pulping.The slurry that will accomplish fluently, with dilute with plain boiled water after and added and be polymerized in right amount
3% Titanium dioxide slurry of thing suspension stabilizer mixes, stir about 10min, handsheet.Copy
Paper in air dry oven at 105 DEG C be dried about about 15min.Entire paper is weighed, folds
Fill in crucible, put in Muffle furnace.First it is warming up to 100 DEG C, is incubated 5min；It is warming up to 200 DEG C again,
Insulation 15min；Finally it is warming up to 540 DEG C, is incubated 4h.After calcining completely, take its cooling, weigh
Residual ash (in canescence), calculates filler retention.
(3) result and discussion
I. the lower suspending stabilized performance of titanium dioxide of polymer DHS effect
(1) the different monomers proportioning DHS impact on titanium dioxide particle surface zeta current potential
The impact on titanium dioxide particle surface zeta current potential of a, styrene-content
The amount of fixing DMC with HPA is that 3:1 is constant, changes cinnamic amount, and styrene accounts for it
His the ratio scope of two kinds of monomer gross masses is 0%, 2.5%, 5%, 7.5%, 10%, 12.5%.Real
Issue after examination and approval existing: styrene account for total monomer quality in the range of 0%-7.5% time, along with styrene addition
Improving constantly, the absolute value of titanium dioxide Particle surface charge is gradually increased, until maximum, now hangs
Floating stabilizer dispersion effect is best.After suspension stabilizer addition is more than 10%, titanium dioxide surface
Zeta current potential absolute value has declined, the minimizing of the electrostatic repulsion forces between granule and granule, titanium
White lead dispersive property in water the most correspondingly declines.So styrene accounts for total monomer quality 0%
Time in the range of-7.5%, the dispersive property of suspension stabilizer is optimal, sees accompanying drawing 1.
B, the impact on titanium dioxide particle surface zeta current potential of the monomer DMC content
The amount of fixing St with HPA is that 1:1 is constant, only the amount of change DMC, DMC and its
He is respectively 0:2,1.5:2,2:2,2.5:2,3:2,3.5:2 by the ratio of monomer gross mass.
Result is shown in accompanying drawing 2.
When the ratio of DMC and other monomer gross masses is in the range of 0:2 to 3:2, along with DMC
Improving constantly of addition, the absolute value of titanium dioxide Particle surface charge is gradually increased, until maximum,
Now suspension stabilizer dispersion effect is best.Visible, DMC exists with the ratio of other monomer gross masses
Time near 3:2, the dispersive property of suspension stabilizer is optimal.
The impact on titanium dioxide particle surface zeta current potential of c, suspension stabilizer consumption
The proportional quantity of DMC, St, HPA is that the polymeric suspension stabilizer DHS of 3:1:1 is by titanium white
The addition for 0.0%-0.4% of opaque amount is added in Titanium dioxide slurry.Result is shown in Fig. 3.
The interpolation scope of DHS is when 0.0%-0.34%, along with addition continuous of suspension stabilizer
Increasing, the zeta current potential absolute value of titanium dioxide particle surface increases, and dispersive property steps up；Suspend
Stabilizing agent dosage is in the range of 0.34%-0.36%, along with the addition of suspension stabilizer, titanium dioxide surface
Zeta current potential increase tends towards stability, and the electrically charged absolute value amplification of titanium dioxide surface institute is little, dispersion effect
Reach optimal.When addition is more than 0.36%, titanium dioxide surface zeta potential current potential absolute value under
Fall, the dispersive property of titanium dioxide is reduced by polymeric suspension stabilizer.So the addition of suspension stabilizer
Amount is 0.34%-0.36%.
(2) high power microscope characterizes
A is not with the suspended state in water of titanium dioxide during suspension stabilizer, and result is shown in Fig. 4.
As seen from Figure 4, when not adding suspension stabilizer, the most minimal amount of titanium dioxide is suspended in
In water, and the titanium dioxide granule suspended in water is relatively big, even if the titanium dioxide suspended in water is described
Also there is the phenomenon of gathering, and most titanium dioxide flocks together, form bigger agglomerated particle also
It is deposited in bottom.Visible, when being not added with suspension stabilizer, titanium dioxide suspension stability in water is relatively
Difference, it is impossible to be well dispersed in water.
Titanium dioxide suspended state in water when b, interpolation suspension stabilizer, result is shown in Fig. 5.
As seen from Figure 5, after adding suspension stabilizer, titanium dioxide substantially can be dispersed in water
In, between granule and granule, spacing is less, and major part titanium dioxide can be suspended in water, and is suspended in
Grain diameter in water is less than the titanium dioxide grain diameter being not added with suspending in water during suspension stabilizer.
So, the interpolation of suspension stabilizer can make titanium dioxide be well dispersed in water, significantly improves titanium
White lead suspension stability in water.
(3) suspension stability characterizes
Prepare 0.5% Titanium dioxide slurry with distilled water, be separately added into different cationic polymers and suspend steady
Determine agent, stand four days, observe titanium dioxide suspension stability in water, and use camera Taking Pictures recording.
A difference suspension stabilizer addition is on titanium dioxide impact of suspension stability in water
Cationic polymer suspension stabilizer addition account for titanium dioxide quality be respectively 0.0%, 0.2%,
0.25%, time 0.3%, 0.34%, 0.36%, 0.38%, 0.4% (from left to right) titanium dioxide at water
The photo of middle deployment conditions, is shown in Fig. 6.When cationic polymer suspension stabilizer addition is 0.0%,
Titanium dioxide almost all wadding coalescence is deposited in bottom, and layering is clearly.Suspension stabilizer addition exists
In the range of 0.20%-0.36%, titanium dioxide lamination in water increasingly tends to fuzzy, titanium dioxide
Suspension stability gradually strengthen.
When suspension stabilizer addition reaches about 0.34%, suspension stabilizer is on titanium dioxide granule
Absorption basically reaches saturated, and lamination is inconspicuous, and now the suspension stability of titanium dioxide reaches best.
When dosage reaches 0.38%, the suspension stability of titanium dioxide has declined, and divided titanium dioxide is dispersed in
Dispersion in water starts to be deteriorated, and lamination increases the weight of.Visible, suspension stabilizer optimal addn is titanium
The 0.34%-0.36% of white lead quality.
B, styrene consumption are on titanium dioxide impact of suspension stability in water
When Fig. 7 is 0 for (from left to right) styrene addition, and (DMC&HPA): St's
Mass values is respectively the photo of 7:1,6:1,5:1,4:1,3:1 titanium dioxide suspension in water.
As shown in Figure 7, from left to right, the suspending stabilized effect of titanium dioxide is become better and better, when ratio is 4:1
Time, the suspension stability of titanium dioxide is best.Continuation increase styrene dosage, i.e. (DMC&HPA):
When St is 3:1, the polymeric suspension stabilizer stability prepared is bad, and titanium dioxide is in water
Suspension engenders and is layered more clearly, and dispersion effect reduces.When styrene addition is 0,
Only very small amount titanium dioxide is suspended in upper strata, and major part titanium dioxide is collected at lower floor, and titanium dioxide is in water
Suspension stability worst.So, the addition of monomer styrene can make dividing of polymeric suspension stabilizer
Scattered effect significantly improves, dosage for (DMC&HPA): St be=about 3:1 can ensure polymer
Dispersive property is best.
(4) SEM characterizes
The scanning electron microscope surface of titanium dioxide granule when Fig. 8 is not add cationic polymer suspension stabilizer
Morphology characterization.The Titanium dioxide slurry particle agglomeration being not added with suspension stabilizer is obvious, and granule divides with granule
Dissipate uneven, between big clustered particles and granule, have bigger space.Reason be titanium dioxide particle diameter little,
Specific surface area is big, surface can be high, and easy self-assemble is reunited together.
When Fig. 9 adds cationic polymer suspension stabilizer (dosage accounts for the 0.34% of titanium dioxide quality)
Add the scanning electron microscope surface topography after suspension stabilizer to characterize., the anchoring group absorption of suspension stabilizer
At particle surface, the solvent chain of polymer extend in water, has ultimately formed double electrical layers, makes
Because of mutually exclusive with identical charges between granule and granule, final stable suspersion is in water.So,
The interpolation of cationic polymer suspension stabilizer can make titanium dioxide be suspended in well in water, significantly
Improve titanium dioxide deployment conditions in water.
(5) retention characterizes
The computing formula of retention is: R=m (1+c)/A (1-a) × 100%
Ash quality after m calcining, g
Starch quality ratio, % in c modified filler
The quality of the modified filler added in individual sheet of A, g
The mass loss rate during calcining of a filler, a=3.3804%
In modified filler, starch quality ratio is 0, and after calcining, ash quality m does not adds titanium dioxide for removing
Time pure pulp ash be actual titanium dioxide calcining after final quality.
Table 1 titanium dioxide retention
(4) conclusion
(1) addition of suspension stabilizer can significantly improve titanium dioxide dispersibility in water.(0.0%
-0.34%), in the range of, along with the addition of suspension stabilizer, titanium dioxide particle surface zeta current potential is absolute
Value is gradually increased, and titanium dioxide suspension stability in water significantly improves, and titanium dioxide is at water
In viscosity reduce；When suspension stabilizer addition is 0.34%, dispersion effect reaches optimal；But
When suspension stabilizer addition is more than 0.36%, titanium dioxide particle surface zeta value and titanium dioxide exist
In water, viscosity and suspending stabilized performance all reduce, less efficient dispersal.So suspension stabilizer is optimal
Addition is 0.32-0.36%.
(2) addition of monomer styrene can significantly improve the dispersion effect of polymeric suspension stabilizer,
But the polymer stabilisation that too much styrene addition makes preparation is deteriorated.Monomer weight ratio is
(DMC&HPA): during St=4:1, polymer dispersion effect reaches best.
(3) addition of cationic polymer suspension stabilizer, can improve titanium dioxide filler at paper
Retention.In the range of 0.2%-0.36%, along with the addition of cationic polymer suspension stabilizer
Being gradually increased, the retention of titanium dioxide gradually steps up, but when addition exceedes 0.36% time, keep
Rate decreases on the contrary, and in order to improve the titanium dioxide filler retention at paper, cationic polymer hangs
The addition of floating stabilizer is preferably about 0.32%.
Claims (10)
1. the preparation method of the cationic suspension stabilizer of papermaking titanium dioxide, it is characterised in that: this system
Preparation Method step includes:
A, control bath temperature are 75-85 DEG C, are that 3:1:1 takes methacryl by quality proportion relation
Oxy-ethyl-trimethyl salmiac, Hydroxypropyl acrylate, styrene, standby；
B, take chain-transferring agent, standby material that emulsifying agent and step A are taken joins the appearance filling water
Being stirred until homogeneous in device, wherein, the quality of chain-transferring agent is the standby material gross mass that step A takes
2～4%, the 1～2% of the standby material gross mass that the quality of emulsifying agent is taken by step A；
C, configuration solid content are the aqueous solution of Ammonium persulfate. of 2～4%, then water-soluble by this Ammonium persulfate.
Drop adds in the container described in step B, be incubated 2-3h, obtain solid content be 15～25% sun from
Subtype suspension stabilizer, wherein the quality of the aqueous solution of Ammonium persulfate. is that the standby material that step A takes is total
The 1～2% of quality.
The preparation side of the cationic suspension stabilizer of papermaking titanium dioxide the most according to claim 1
Method, it is characterised in that: the chain-transferring agent described in step B is sodium hypophosphite.
The preparation side of the cationic suspension stabilizer of papermaking titanium dioxide the most according to claim 1
Method, it is characterised in that: the emulsifying agent described in step B is hexadecyltrimethylammonium chloride, tween
-80 or Arlacel-80 in one or both and more than.
The preparation side of the cationic suspension stabilizer of papermaking titanium dioxide the most according to claim 1
Method, it is characterised in that: the solid content of the aqueous solution of the Ammonium persulfate. described in step C is 3%.
The preparation side of the cationic suspension stabilizer of papermaking titanium dioxide the most according to claim 1
Method, it is characterised in that: in step C, the dropping mode of the aqueous solution of Ammonium persulfate. is: use Dropping funnel
In 0.5～1h dropwise.
The preparation side of the cationic suspension stabilizer of papermaking titanium dioxide the most according to claim 1
Method, it is characterised in that: the quality of step B Chain transfer agent is the standby material gross mass that step A takes
3%.
The preparation side of the cationic suspension stabilizer of papermaking titanium dioxide the most according to claim 1
Method, it is characterised in that: the standby material gross mass that in step B, the quality of emulsifying agent is taken by step A
1.2%.
The preparation side of the cationic suspension stabilizer of papermaking titanium dioxide the most according to claim 1
Method, it is characterised in that: in step C, the quality of the aqueous solution of Ammonium persulfate. is the spares that step A takes
The 1.5% of material gross mass.
The preparation side of the cationic suspension stabilizer of papermaking titanium dioxide the most according to claim 1
Method, it is characterised in that: the solid content of the cationic suspension stabilizer described in step C is 15～25%.
The preparation of the cationic suspension stabilizer of papermaking titanium dioxide the most according to claim 1
Method, it is characterised in that: the container described in step B is the there-necked flask filling distilled water, distilled water
Quality be.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11459418B2 (en) | 2018-11-09 | 2022-10-04 | Southwest Petroleum University | Quadripolymer based on host-guest interaction and preparation process thereof |
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| CN1305440A (en) * | 1998-05-04 | 2001-07-25 | 千年无机化学公司 | Very high solids TiO2 slurries |
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| US3639208A (en) * | 1968-03-04 | 1972-02-01 | Calgon Corp | Polyamphoteric polymeric retention aids |
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| US11459418B2 (en) | 2018-11-09 | 2022-10-04 | Southwest Petroleum University | Quadripolymer based on host-guest interaction and preparation process thereof |
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