CN102277782B - Nano TiO2 compounded system and application thereof in drainage and retention of waste paper deinking pulp - Google Patents
Nano TiO2 compounded system and application thereof in drainage and retention of waste paper deinking pulp Download PDFInfo
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- CN102277782B CN102277782B CN2011102541126A CN201110254112A CN102277782B CN 102277782 B CN102277782 B CN 102277782B CN 2011102541126 A CN2011102541126 A CN 2011102541126A CN 201110254112 A CN201110254112 A CN 201110254112A CN 102277782 B CN102277782 B CN 102277782B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
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Abstract
The invention discloses a nano TiO2 compounded system and application thereof in drainage and retention of waste paper deinking pulp (DIP). The compounded system comprises nano TiO2 and a polymer, wherein the polymer consists of a starch polymer and/or a polyacrylamide polymer; the starch polymer is amphoteric starch or cationic starch, and the polyacrylamide polymer is cationic polyacrylamide or anionic polyacrylamide; in a binary system, the ratio of the nano TiO2 to the starch polymer is (1-10) to 5, and the ratio of the nano TiO2 to the polyacrylamide polymer is (2-20) to 1; and in a ternary system, the ratio of the nano TiO2 to the starch polymer to the polyacrylamide polymer is (1-20) to (1-40) to 1. The multielement compounded system of the nano TiO2 has a good drainage and retention effect of making the DIP, and the retention rate and the water filter performance can be improved.
Description
Technical field
The present invention relates to a kind of retention and drainage aid agent of pulp from decoloured waste paper, especially be applied to the nano-TiO of pulp from decoloured waste paper retention aid and filtering aid
2The Recompounded multielement system.
Background technology
Retention and drainage aid agent is the important auxiliary agent of paper sheet formation process, and in the last few years, increasing scholar was devoted to the research of retention and drainage aid agent in paper-making process.Last century, the eighties, be used widely in page is manufactured paper with pulp process by the microparticle retention and drainage system that inorganic negative electricity particulate and organic positive electricity high polymer form, and satisfied to a certain extent the needs of paper machine high-speed cruising.Recently by composite with other high polymer, organic positive electricity particulate and inorganic positive electricity particulate also are used as retention and drainage aid agent and are incorporated into the wet end of machine chemistry, because of this based fine particles electropositive just in time opposite with the elecrtonegativity of slurry, existence produces the possibility of better keeping with the drainage effect than negative electricity microparticle system, and tentatively demonstrate tempting application prospect, form new study hotspot.Especially the removal and control effect of cationic microparticles retention and drainage aid agent to DCS in plain boiled water (dissolving and colloidality material) caused researcher's interest especially.Especially in pulp from decoloured waste paper (DIP), because its DCS content is large, can term of validity removal seem especially particularly important.
Nano-TiO
2Have huge specific area and electropositive, the abundant hydroxyl in its surface easily adsorbs it with other materials, therefore can produce the absorption wadding for the elecrtonegativity fiber of slurry, subtitle substance, DCS etc. and gather and act on.Nano-TiO is found in research
2Binary system DCS in Deinking Pulp is had good removal and controls effect.
Independent nano-TiO
2Perhaps the retention and drainage effect of starch and high polymer is restricted to a certain extent, and present research is not considered filler in actual production can not well embody actual production situation.
Summary of the invention
The object of the invention is to the shortcoming for the prior art existence, under the prerequisite that closing to reality is produced more, added filler, seek optimum retention aid and filtering aid formula exploratoryly, obtain different formulas by changing each multicomponent system component, content etc., test to investigate the retention and drainage effect of each system by dynamic drainage, obtain keeping and water filtering performance good formula all.
For reaching this purpose, the present invention has taked following technical scheme:
A kind of nano-TiO
2The binary built system comprises nano-TiO
2And polymer, described polymer is starch based polymers or polyacrylamide polymer, wherein starch based polymers is amphoteric starch or cationic starch, and polyacrylamide polymer is cationic polyacrylamide or anionic polyacrylamide, nano-TiO in described binary system
2With the ratio of starch based polymers be (1～10): 5; Nano-TiO
2With the ratio of polyacrylamide polymer be (2～20): 1.Described nano-TiO
2Average grain diameter be 7.91nm.
Preferably, in the binary built system, when polymer was anionic polyacrylamide, the order of addition of compound system was for first adding nano-TiO
2, then add polymer; When polymer was starch based polymers or cationic polyacrylamide, the order of addition of compound system was for first adding polymer, then added nano-TiO
2
A kind of nano-TiO
2The ternary built system comprises nano-TiO
2And starch based polymers and polyacrylamide polymer, wherein starch based polymers is amphoteric starch or cationic starch, polyacrylamide polymer is cationic polyacrylamide or anionic polyacrylamide, described nano-TiO
2, starch based polymers and polyacrylamide polymer three ratio be (1～20): (1～40): 1.
Preferably, in the ternary built system, the order of addition of compound system is for first adding polyacrylamide polymer, then adds starch based polymers, adds at last nano-TiO
2
Preferably, the CATION substitution value from 0.01 to 0.5 of described amphoteric starch, Anion substituting degree from 0.01 to 0.5; The CATION substitution value from 0.01 to 0.5 of described cationic starch.
Preferably, the molecular weight of described anionic polyacrylamide from 5,000,000 to 15,000,000; The molecular weight of described cationic polyacrylamide from 5,000,000 to 1,500 ten thousand, its cationic degree from 10% to 50%.
The application of above-mentioned compound system in the pulp from decoloured waste paper retention aid and filtering aid is added with filler in described pulp from decoloured waste paper, and described filler is calcium carbonate, kaolin or talcum powder, and is 20% of described pulp from decoloured waste paper oven dry stock mass concentration.
The present invention compared with prior art has following advantage:
Nano-TiO in the present invention
2The Recompounded multielement system to the DIP good retention and drainage effect of manufacturing paper with pulp; There is the polarity of opposite charge in amphoteric starch and cationic starch, and has three-dimensional structure, for fiber, DCS etc. provides more in conjunction with chance, improved the flco structure, increase the poly-chance of more wadding, thereby be conducive to retention and drainage.
Description of drawings
Fig. 1 is nano-TiO
2Retention effect figure with CS, AmS binary system;
Fig. 2 is nano-TiO
2With CPAM, APAM binary system retention effect figure;
Fig. 3 is nano-TiO
2Water filtering performance design sketch with CS, AmS binary system;
Fig. 4 is nano-TiO
2Water filtering performance design sketch with CPAM, APAM binary system;
Fig. 5 is nano-TiO
2Ternary system retention effect figure;
Fig. 6 is nano-TiO
2The water filtering performance design sketch of ternary system.
The specific embodiment
Referring now to accompanying drawing, further describe the present invention.The present invention's nano-TiO used
2Available from Hunan nanosecond science and technology Co., Ltd of titanium Tang.
At this nano-TiO of preparation
2During the Recompounded multielement system, be at first the gelatinization of starch and the preparation of cationic polyacrylamide and anionic polyacrylamide.
The gelatinization of starch: get 2.0g starch and join in 98.0g distilled water, under the 250rpm stirring condition, warming-in-water to 95 ℃ in 15min, agitator speed is increased to 500rpm, after insulation 15min, is cooled to room temperature, and standby with distilled water diluting to 1.0%.In use keep its 100rpm is stirred.
The preparation of cationic polyacrylamide or anionic polyacrylamide: measure 150mL distilled water, under room temperature, 300rpm stirs, and slowly adds the 0.2500g high polymer, is stirred to high polymer and fully dissolves dispersion, and constant volume is to 250mL.To keep the stirring to its 100rpm when using high polymeric solution in experiment.
Using this nano-TiO
2During the Recompounded multielement system, the pulp from decoloured waste paper slurry preparation is: the DIP slurry that takes mass concentration 20% adds 2000mL water, discongest (30000 turn) in fluffer, thin up, filled (oven dry stock mass concentration 20%) stirs 30s, is diluted with water to mass concentration 0.5% and dynamically keeps experiment.
A kind of nano-TiO that is applied to the pulp from decoloured waste paper retention aid and filtering aid
2The binary built system comprises nano-TiO
2And starch based polymers, wherein starch based polymers is amphoteric starch (AmS, its CATION substitution value 0.020, Anion substituting degree 0.015) or cationic starch (CS, its CATION substitution value 0.035), nano-TiO in described binary system
2With the addition of amphoteric starch or cationic starch referring to table 1.The filler that adds in pulp from decoloured waste paper used is calcium carbonate, is 20% of pulp from decoloured waste paper oven dry stock.
Table 1TiO
2Each concentration of component in the experiment of-starch based binary built system
The step of dynamic drainage experiment is: for binary system, experimentation is as follows: get the 500mL slurry and join in the dynamic drainage instrument, begin with the 750r/min initial velocity, add corresponding dosage reagent 1 (CS/AmS) during 30s, during 35s, speed governing is to 1200r/min, during 60s, reduction of speed to 750r/min, adds corresponding dosage reagent 2 (nano-TiOs during 65s
2), keep rotating speed to open dynamic drainage instrument valve during 75s and collect filtrate, receive 100mL filtrate with volumetric flask, and the record reception filtrate time used, and with time representation drainage effect, the water filtering performance of fewer expression reagent of time is better, otherwise poorer.Filtrate is carried out suction filtration, and drying is surveyed retention rate.Then valve-off and stop stirring, take off dynamic drainage instrument screen pack (200 order) ultrasonic cleaning 3min, re-assemblies and carry out dynamic drainage experiment next time.
From accompanying drawing 1 as can be known, along with nano-TiO
2Consumption is increased to 0.2%, AmS and nano-TiO from 0
2The retention of the binary built system that forms has improved 19.63%, CS binary system and has improved 15.99%, and when the concentration of nano titanium oxide was higher, retention tended to balance.The data of Fig. 3 show, nano-TiO
2The double element system that forms with AmS shows very strong synergy, and its water filtering performance reaches good effect, has dropped to 13S from 63S; Equally, CS and nano-TiO
2After composite, its water filtering performance also is improved, and has dropped to 28S by original 55S.
The difference of the present embodiment and embodiment 1 is: take polyacrylamide as compound, each system compound adds concentration as shown in table 2.The filler that adds in pulp from decoloured waste paper used is kaolin.
Table 2TiO
2Concentration of component in the experiment of-PAM binary built system
Dynamic drainage experiment: for this binary system, if the compound that adds is cationic polyacrylamide (CPAM, its molecular weight is 6,000,000, cationic degree 30%) time, experimentation is as follows: get the 500mL slurry and join in the dynamic drainage instrument, begin with the 750r/min initial velocity, add corresponding dosage reagent 1 (CPAM) during 30s, during 35s, speed governing is to 1200r/min, and during 60s, reduction of speed to 750r/min, adds corresponding dosage reagent 2 (nano-TiOs during 65s
2), keep rotating speed to open dynamic drainage instrument valve during 75s and collect filtrate; If the compound that adds is anionic polyacrylamide (APAM, its molecular weight is 6,000,000) time, experimentation is as follows: get the 500mL slurry and join in the dynamic drainage instrument, begin with the 750r/min initial velocity, add corresponding dosage reagent 1 (nano-TiO during 30s
2), during 35s, speed governing is to 1200r/min, and during 60s, reduction of speed to 750r/min, adds corresponding dosage reagent 2 (APAM) during 65s, keeps rotating speed to open dynamic drainage instrument valve during 75s and collects filtrate.
Nano-TiO in Fig. 2
2The increase of amount makes the system retention raise, CPAM and nano-TiO
2Compound system at nano-TiO
2When consumption was increased to 0.1% from 0, its retention had improved 1.59%, APAM system and has improved 1.12%.No matter CPAM or APAM and nano-TiO
2Composite rear water filtering performance all is greatly improved.
The difference of the present embodiment and embodiment 1 is: this embodiment is with nano-TiO
2For the ternary built system on basis, with nano-TiO
2Composite as retention aid and filtering aid system with polyacrylamide and starch based, in each formula, the concentration of compound is as shown in table 3.The filler that adds in pulp from decoloured waste paper used is talcum powder.
Table 3 ternary system experimental formula
The dynamic drainage experiment: for ternary system, (CPAM/APAM:CPAM, its molecular weight are 6,000,000, cationic degree 30% to add reagent 1 when 30S; APAM, its molecular weight are 6,000,000), add reagent 2 (CS/AmS:AmS, its CATION substitution value 0.020, Anion substituting degree 0.015 during 65S; CS, its CATION substitution value 0.035), add reagent 3 (nano-TiOs during 95S
2), accept filtrate during 110S, other operate same binary system.
We find to fill a prescription and 3 retention performance are preferably arranged from Fig. 5 Fig. 6, and total retention has reached 97.52%, and filler is kept and also reached 93.68%, that is to say that the CPAM system has better retention performance with respect to the APAM ternary system.
Above-described embodiments of the present invention do not consist of the restriction to protection domain of the present invention.Any modification of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in claim protection domain of the present invention.
Claims (4)
1. nano-TiO
2Compound system is characterized in that, comprises nano-TiO
2And starch based polymers and polyacrylamide polymer, wherein starch based polymers is amphoteric starch or cationic starch, polyacrylamide polymer is cationic polyacrylamide or anionic polyacrylamide, described nano-TiO
2, starch based polymers and polyacrylamide polymer three ratio be (1 ~ 20): (1 ~ 40): 1; The order of addition of compound system is for first adding polyacrylamide polymer, then adds starch based polymers, adds at last nano-TiO
2
2. compound system according to claim 1, is characterized in that, the CATION substitution value from 0.01 to 0.5 of described amphoteric starch, Anion substituting degree from 0.01 to 0.5; The CATION substitution value from 0.01 to 0.5 of described cationic starch.
3. compound system according to claim 1 and 2, is characterized in that, the molecular weight of described anionic polyacrylamide from 5,000,000 to 1,500 ten thousand; The molecular weight of described cationic polyacrylamide from 5,000,000 to 1,500 ten thousand, its cationic degree from 10% to 50%.
4. the application of the described compound system of claim 1 ~ 3 any one in the pulp from decoloured waste paper retention aid and filtering aid, it is characterized in that, be added with filler in described pulp from decoloured waste paper, described filler is calcium carbonate, kaolin or talcum powder, and is 20% of described pulp from decoloured waste paper oven dry stock mass concentration.
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| CN2011102541126A CN102277782B (en) | 2011-08-31 | 2011-08-31 | Nano TiO2 compounded system and application thereof in drainage and retention of waste paper deinking pulp |
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| CN110055810B (en) * | 2018-01-19 | 2022-02-25 | 金东纸业（江苏）股份有限公司 | Paper and preparation method thereof |
| CN108824074A (en) * | 2018-08-13 | 2018-11-16 | 冠宏化工（扬州）有限公司 | The filler and its preparation process of a kind of polymerization of surface active and the application on manufacture paper |
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