CN115322294A - Starch synergist and preparation method and application thereof - Google Patents
Starch synergist and preparation method and application thereof Download PDFInfo
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- CN115322294A CN115322294A CN202211232363.9A CN202211232363A CN115322294A CN 115322294 A CN115322294 A CN 115322294A CN 202211232363 A CN202211232363 A CN 202211232363A CN 115322294 A CN115322294 A CN 115322294A
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- 229920002472 Starch Polymers 0.000 title claims abstract description 164
- 235000019698 starch Nutrition 0.000 title claims abstract description 164
- 239000008107 starch Substances 0.000 title claims abstract description 163
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000000725 suspension Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 230000014759 maintenance of location Effects 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims description 36
- 239000000178 monomer Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 15
- 239000003999 initiator Substances 0.000 claims description 10
- 125000004169 (C1-C6) alkyl group Chemical group 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 230000000977 initiatory effect Effects 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 239000012986 chain transfer agent Substances 0.000 claims description 4
- 239000002738 chelating agent Substances 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 claims description 2
- 125000004185 ester group Chemical group 0.000 claims description 2
- -1 halide ion Chemical group 0.000 claims description 2
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 2
- 125000000864 peroxy group Chemical group O(O*)* 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- 150000003242 quaternary ammonium salts Chemical group 0.000 claims description 2
- 238000005956 quaternization reaction Methods 0.000 claims description 2
- 239000012966 redox initiator Substances 0.000 claims description 2
- 125000004442 acylamino group Chemical group 0.000 claims 1
- 238000005507 spraying Methods 0.000 abstract description 14
- 125000002091 cationic group Chemical group 0.000 abstract description 13
- 239000002245 particle Substances 0.000 abstract description 11
- 239000011229 interlayer Substances 0.000 abstract description 9
- 239000000835 fiber Substances 0.000 abstract description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 abstract description 2
- 239000001257 hydrogen Substances 0.000 abstract description 2
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 2
- 230000004048 modification Effects 0.000 abstract description 2
- 238000012986 modification Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 7
- 229920002401 polyacrylamide Polymers 0.000 description 6
- 229920001131 Pulp (paper) Polymers 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 229920000881 Modified starch Polymers 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 235000019426 modified starch Nutrition 0.000 description 3
- 229920002261 Corn starch Polymers 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 235000010724 Wisteria floribunda Nutrition 0.000 description 2
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 239000008120 corn starch Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- JHUFGBSGINLPOW-UHFFFAOYSA-N 3-chloro-4-(trifluoromethoxy)benzoyl cyanide Chemical compound FC(F)(F)OC1=CC=C(C(=O)C#N)C=C1Cl JHUFGBSGINLPOW-UHFFFAOYSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- 229920002085 Dialdehyde starch Polymers 0.000 description 1
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 1
- 229920006320 anionic starch Polymers 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 229920006317 cationic polymer Polymers 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- JCRDPEHHTDKTGB-UHFFFAOYSA-N dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]azanium;chloride Chemical compound Cl.CN(C)CCOC(=O)C(C)=C JCRDPEHHTDKTGB-UHFFFAOYSA-N 0.000 description 1
- GQOKIYDTHHZSCJ-UHFFFAOYSA-M dimethyl-bis(prop-2-enyl)azanium;chloride Chemical compound [Cl-].C=CC[N+](C)(C)CC=C GQOKIYDTHHZSCJ-UHFFFAOYSA-M 0.000 description 1
- AVWKSSYTZYDQFG-UHFFFAOYSA-M dimethyl-octadecyl-prop-2-enylazanium;chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCCCC[N+](C)(C)CC=C AVWKSSYTZYDQFG-UHFFFAOYSA-M 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 235000013808 oxidized starch Nutrition 0.000 description 1
- 239000001254 oxidized starch Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- C08F226/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen
- C08F226/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen by a single or double bond to nitrogen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
- C08L3/02—Starch; Degradation products thereof, e.g. dextrin
-
- 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
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/28—Starch
-
- 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
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
- D21H17/44—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups cationic
- D21H17/45—Nitrogen-containing groups
- D21H17/455—Nitrogen-containing groups comprising tertiary amine or being at least partially quaternised
-
- 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
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
-
- 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
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
Abstract
The invention discloses a starch synergist and a preparation method and application thereof, belonging to the technical field of starch modification, wherein clear water and raw starch are fully mixed and uniformly stirred to obtain a starch suspension; and fully mixing the starch suspension with the prepared starch synergist, uniformly stirring, and pressurizing for interlayer spraying. The cationic starch synergist can endow starch with positive electricity, has reactive groups, has film forming property, can generate covalent bonds and hydrogen bonds with carboxyl and hydroxyl on the surface of fibers, enables starch particles to be uniformly and stably dispersed on the surface of the fibers, can remarkably improve the retention rate of original starch, improves the use efficiency of the starch and simultaneously improves the strength of finished paper. The starch synergist has low starch consumption, and the starch treated by the starch synergist has no obvious increase in particle size and less influence on the viscosity of the original system.
Description
Technical Field
The invention relates to the technical field related to starch modification, in particular to a starch synergist and a preparation method and application thereof.
Background
Starch is an important papermaking raw material, the molecular structure of the starch is similar to that of fiber, and a large number of hydroxyl groups are arranged on the molecular chain, so that the starch can play a plurality of promotion roles in the production of the papermaking industry. In the actual use process of the paper industry, the starch can be simply divided into four categories according to the specific use method, namely starch added into pulp, spray starch, starch for sizing and starch for coating. In addition, since modified/modified starches (anionic starch, oxidized starch, cationic starch, phosphate starch, dialdehyde starch, and the like) have better application effects and functionalities than native starches, the proportion of modified/modified starches currently used in the starch for the paper industry is increasing, and one of the most widely used modified/modified starches is cationic starch.
In the production of bobbin paper, due to the reasons of paper type positioning, cost control and the like, the using amount of starch is higher than that of the traditional papermaking production, the overall consumption of starch per ton of paper can reach 60 to 180kg, and the most used amount of starch is interlayer spraying starch. The original starch as a non-ionic small molecular substance can only be left on paper in a mechanical interception mode, and the utilization rate of direct spraying in the form of uncooked gelatinized starch liquid is less than 7 percent, so that a paper mill needs to add a large amount of original starch to reach certain paper forming physical strength. And the raw starch which is not effectively utilized enters white water circulation of the paper machine, which not only causes waste of resources, but also causes production obstacles (vehicle speed reduction and difficult dehydration) of the paper machine and increase of water treatment load.
Therefore, there is a need for a treatment method of native starch, which can improve the retention efficiency of native starch and enhance the enhancement effect of native starch, thereby achieving the synergistic treatment purpose of native starch.
Disclosure of Invention
The application aims to solve the problems and provides a starch synergist, a preparation method and application.
A starch synergist is prepared by copolymerizing a first monomer and a second monomer, wherein the structure of the first monomer is shown as the following formula 1:
formula 1
；
The second monomer is a quaternary ammonium salt formed by quaternization of the following formula 2 and/or the following formula 3:
formula 2
And formula 3
；
Wherein the content of the first and second substances,
R 1 is H or methyl;
R 2 is C1-C6 alkyl;
R 3 、R 4 is C1-C6 alkyl or isopropyl;
R 5 is C14-C20 alkyl;
x is a halide ion;
R 6 is one or more of C1-C6 alkyl, carbonyl, C2-C4 ester group and C2-C4 amide;
r7 is H, C1-C6 alkyl,
One or more of (a).
Preferably or optionally, in the starch synergist, the mass ratio of the formula 1 to the formula 2 is 0.02 to 0.42.
A preparation method of a starch synergist comprises the following steps:
adding deionized water, a first monomer, a second monomer, a chelating agent and a chain transfer agent into a reaction container, fully stirring and dissolving, adjusting the pH, introducing nitrogen to remove oxygen, adjusting the system temperature to the initiation temperature, adding an initiator to initiate reaction, keeping the temperature for 2 to 7 hours, cooling after the reaction is finished, and adjusting the pH to obtain the starch synergist.
Preferably or optionally, the composition comprises, by mass, 2 to 30 parts of a first monomer, 70 to 160 parts of a second monomer, 0.05 to 0.1 part of a chelating agent, 0.01 to 1 part of a chain transfer agent, and 0.01 to 0.1 part of an initiator.
Preferably or optionally, the initiator is one or more of azo initiator, peroxy initiator and redox initiator.
Preferably or optionally, the initiation temperature is 30 to 60 ℃; the temperature of the heat preservation reaction is 50 to 80 ℃; and after the reaction is finished, cooling to 20-40 ℃.
Preferably or optionally, after the reaction is finished, cooling, and adjusting the pH to 5-7.
The starch synergist prepared by the preparation method of the starch synergist in any one of the above steps is used for preparing high-retention starch, and comprises the following steps:
fully mixing clean water with raw starch, and uniformly stirring to obtain a starch suspension;
and II, fully mixing the starch suspension and the starch synergist, and uniformly stirring to obtain the starch synergist.
The invention also provides a high-retention starch preparation device, which comprises a first reaction device, a second reaction device and a pressurizing assembly; the first reaction device, the second reaction device and the pressurizing assembly are provided with a discharge port and a discharge port; the first reaction device is connected with the second reaction device, and more specifically, a discharge hole of the first reaction device is connected with a feed hole of the second reaction device; and the feeding hole of the pressurizing assembly is connected with the discharging hole of the second reaction device. And a vibrating screen is arranged between the discharge port of the first reaction device and the feed port of the second reaction device. The pressurizing assembly sequentially comprises a pressurizing pump, a pressure regulating valve and a pressure gauge. The mesh number of the vibrating screen is 60 to 140 meshes.
The device is used for preparing the starch with high retention rate and comprises the following steps:
fully mixing clear water and raw starch in a first reaction device, and uniformly stirring to obtain a starch suspension;
and II, adding a starch synergist into the second reaction device after passing through the vibrating screen, transferring the starch suspension from a discharge port of the first reaction device to the second reaction device through the vibrating screen, uniformly mixing the starch synergist and the starch suspension, pressurizing through a pressurizing assembly, and spraying between starch layers.
Has the advantages that: the invention provides a high-retention starch preparation device and a preparation method, wherein starch is modified by a starch synergist, wherein a cationic monomer is used as a main monomer of the starch synergist, so that the starch can be endowed with positive electricity, and simultaneously, the cationic monomer contains a reactive group with higher density, has film-forming property, can generate covalent bonds and hydrogen bonds with carboxyl and hydroxyl on the surface of paper pulp fibers, so that starch particles are uniformly and stably dispersed on the surface of the paper pulp, the retention rate of original starch can be obviously improved, the use efficiency of the starch is improved, and the paper-forming strength is improved. The starch synergist has low starch consumption, and the starch treated by the starch synergist has no obvious increase in particle size, has small influence on the viscosity of the original system, meets the original use process conditions, can be directly added into paper pulp for use, and is also suitable for interlayer spraying.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.
The invention will now be further described with reference to the following examples, which are intended to be illustrative of the invention and are not to be construed as limiting the invention. Those who do not specify particular techniques and reaction conditions in the examples can follow the techniques or conditions or product specifications described in the literature in this field. Reagents, instruments or equipment of any manufacturer not indicated are commercially available.
In the actual use process of the paper industry, starch can be simply divided into four categories according to specific use methods, namely starch added into pulp, spray starch, starch for sizing and starch for coating. In the existing cooking process of raw starch, a certain cationic polymer can be simply added to obtain a mixed paste liquid with partial cationic starch performance, and in the 4 using methods, except for spraying starch, the other 3 methods generally need to dilute starch according to a certain concentration and cook and gelatinize the starch to be specifically used (spraying starch is mainly used for improving interlayer combination, the distribution uniformity of starch liquid needs to be considered, the viscosity of a starch system after cooking is obviously increased and cannot be used in the way), and the simple and low-cost treatment method is also a main reason that the cationic starch can be widely accepted and applied by the paper industry besides the application effect.
Preparing a starch synergist:
adding 220 parts of deionized water, 10 parts of octadecyl dimethyl allyl ammonium chloride (mass concentration of 65%), 10 parts of methacryloyloxyethyl dimethyl ammonium chloride (mass concentration of 60%), 150 parts of dimethyl diallyl ammonium chloride (mass concentration of 60%), 0.03 part of ethylene diamine tetraacetic acid disodium salt and 0.05 part of sodium allylsulfonate into a reaction container, regulating the speed to 300rpm, fully dissolving, regulating the pH to 4 by using dilute sulfuric acid, introducing nitrogen for 30 minutes to remove oxygen, regulating the system temperature to the initiation temperature, adding 2 parts of ammonium persulfate with the mass concentration of 1%, dropwise adding a sodium bisulfite aqueous solution to the initiation reaction, keeping the temperature for 4 hours, adding 1 part of V50 aqueous solution again, continuing the reaction for 2 hours, cooling, and regulating the pH to 4.0 to obtain the starch synergist.
Preparing high-retention starch:
fully mixing clean water, raw starch and the mixture in a first reaction device, and uniformly stirring to obtain a starch suspension;
II, adding a starch synergist into a second reaction device after passing through a vibrating screen, transferring the starch suspension to the second reaction device from a discharge port of the first reaction device through a 100-mesh vibrating screen, and uniformly mixing the starch synergist and the starch suspension to obtain the starch suspension
High retention starch.
Example 1
Detecting the influence of the starch synergist on the starch particle size:
corn starch was dried in an oven at 75 ℃ and tested for actual starch solids to make up a 10% starch aqueous solution. Slowly dropping a starch synergist, dry powder cationic polyacrylamide, emulsion cationic polyacrylamide and an amphoteric dry strength agent respectively according to the using amount under stirring, and detecting the particle size after processing a sample for 5 min. Wherein the dry powder cationic polyacrylamide is a product of Jiangsu Fujian 28156569 science and technology corporation with the brand number of C6022 HK; the emulsion cationic polyacrylamide is a product of Jiangsu Fuji (281565628 science and technology corporation, and the mark is ECL 30028L; the amphoteric dry strength agent is Jiangsu Fuji 281569, science and technology corporation, brand number P3069. The following table 1 shows the particle size and distribution of the sample measured by the particle size analyzer.
TABLE 1
Examples 1.1 to 1.6 show the particle size distribution of the starch synergist of the present invention, and it can be seen that the particle size and the particle size distribution of the starch synergist of the present invention are not substantially affected by the content change of the synergist, as compared with examples 1.7 to 1.14 which use dry cationic polyacrylamide, emulsion cationic polyacrylamide, and amphoteric dry strength agent.
Example 2
Detecting the influence of the starch synergist on the viscosity of the system:
the absolutely dry corn starch is prepared into a starch water solution with the concentration of 20 percent, the starch synergist obtained by the invention is added, and the viscosity change of the starch solution is tested at 20 ℃, S61 and 10 RPM. Table 2 below is the viscosity test results:
TABLE 2
As can be seen from Table 2, the viscosity of the aqueous starch solution was not significantly changed in examples 2.2 to 2.6 in which the starch synergist of the present invention was added, as compared with example 2.1 in which no starch synergist was added.
Example 3
The change of the paper strength before and after the application of the starch synergist is compared with the paper making method:
OCC paper pulp is prepared in a laboratory, the beating degree is about 45SR, tap water is used for preparing pulp, and the final pulp preparation concentration is about 1.0 percent
And (3) using an automatic sheet making machine in a laboratory to make paper patterns according to requirements, adding a starch synergist into the original starch solution (homogenizing for 15 min), making 4 sheets for each number, and taking the test average value of data results. Table 3 below shows the paper strength test results.
TABLE 3
As can be seen from Table 3, when the dosage of the starch synergist is 10 kg/ton starch, the strength is obviously improved when the dosage is converted to 300ppm per ton paper, and the paper strength is obviously improved along with the increase of the dosage of the starch synergist; after the starch synergist is used, the paper strength is improved, the Z-direction combination is improved, the ring pressure is improved, and the paper is resistant to breakage;
example 4
And (3) testing sheet making, simulating a starch interlayer spraying experiment, and verifying the strength change of the paper after interlayer spraying:
two standard paper sheets (wet paper webs) with the weight of 60g are manufactured by using an automatic laboratory paper-making machine, raw starch liquid and treated starch liquid are uniformly sprayed on one of the standard paper sheets by using spraying equipment, then the two wet paper webs are attached, a target paper sheet is obtained after squeezing and vacuum drying, and the Z-direction bonding strength of the target paper sheet is tested to evaluate the application effect difference before and after addition. Table 4 shows the results of the paper strength test after spraying between the paper layers:
TABLE 4
From table 4, it can be seen that in the interlayer spraying experiment, when the dosage of the starch synergist is 10 kg/ton starch, which is converted to 300 ppm/ton paper, the strength results are also obviously improved, and the paper strength is obviously improved along with the increase of the dosage of the starch synergist, so that the starch synergist is also suitable for interlayer spraying.
Example 5
Starch retention after starch builder application was determined:
the determination of the starch content in the paper product was performed by spectrophotometry (paper sheet was boiled to peel off starch, the filtrate was subjected to iodine color development, and a spectrophotometer was used to test the characteristic absorbance), the test results are shown in table 5:
TABLE 5
As can be seen from table 5, compared with examples 5.1 and 5.2 in which no starch synergist is added, the starch retention rate of the whole paper is obviously improved after the starch synergist is added; and with the increase of the dosage of the starch synergist, the starch retention rate is also obviously increased.
In conclusion, the starch synergist of the invention can not cause obvious increase of the starch grain size after being added, has little influence on the viscosity of the original system, can be directly added into paper pulp for use, and is also suitable for interlayer spraying; the paper prepared by adding the starch synergist has obviously improved paper strength and obviously improved starch retention rate.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
Claims (9)
1. A starch synergist is prepared by copolymerizing a first monomer and a second monomer, wherein the first monomer has a structure shown in a formula 1 as follows:
formula 1
；
The second monomer is a quaternary ammonium salt formed by quaternization according to the following formula 2 and/or the following formula 3:
formula 2
And formula 3
；
Wherein the content of the first and second substances,
R 1 is H or methyl;
R 2 is C1-C6 alkyl;
R 3 、R 4 is C1-C6 alkyl or isopropyl;
R 5 is C14-C20 alkyl;
x is a halide ion;
R 6 is one or more of C1-C6 alkyl, carbonyl, C2-C4 ester group and C2-C4 acylamino;
r7 is H, C1-C6 alkyl,
One or more of (a).
2. The starch synergist according to claim 1, wherein the mass ratio of the formula 1 to the formula 2 in the starch synergist is 0.02 to 0.42.
3. The preparation method of the starch synergist is characterized by comprising the following steps:
adding deionized water, a first monomer, a second monomer, a chelating agent and a chain transfer agent into a reaction container, fully stirring and dissolving, adjusting the pH, introducing nitrogen to remove oxygen, adjusting the temperature of a reaction system to an initiation temperature, adding an initiator to initiate reaction, keeping the temperature for 2 to 7 hours, cooling after the reaction is finished, and adjusting the pH to obtain the starch synergist.
4. The preparation method of the starch synergist according to claim 3, characterized by comprising 2 to 30 parts by mass of a first monomer, 70 to 160 parts by mass of a second monomer, 0.05 to 0.1 part by mass of a chelating agent, 0.01 to 1 part by mass of a chain transfer agent, and 0.01 to 0.1 part by mass of an initiator.
5. The method for preparing the starch synergist according to claim 3, wherein the initiator is one or more of azo initiator, peroxy initiator and redox initiator.
6. The method for preparing the starch synergist according to claim 3, wherein the initiation temperature is 30 to 60 ℃, the temperature of the heat preservation reaction is 50 to 80 ℃, and the temperature is reduced to 20 to 40 ℃ after the reaction is finished.
7. The preparation method of the starch synergist according to claim 3, wherein the temperature is reduced after the reaction is finished, and the pH is adjusted to 2 to 7.
8. The starch synergist prepared by the preparation method of the starch synergist according to any one of claims 3-7, wherein the starch synergist is used for preparing high-retention starch.
9. The starch synergist according to claim 8 for use in the preparation of high retention starch, comprising the steps of:
fully mixing clean water with raw starch, and uniformly stirring to obtain a starch suspension;
and II, fully mixing the starch suspension and the starch synergist, and uniformly stirring to obtain the starch synergist.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1377436A (en) * | 1999-10-19 | 2002-10-30 | 韦尔豪泽公司 | Cationically modified polysaccharides |
| JP2010270263A (en) * | 2009-05-25 | 2010-12-02 | Hymo Corp | Aqueous dispersion liquid and method for promoting paper durability |
| CN108329425A (en) * | 2018-01-02 | 2018-07-27 | 江苏富淼科技股份有限公司 | A kind of emulsifier for alkenyl succinic anhydride |
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- 2022-10-10 CN CN202211232363.9A patent/CN115322294A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1377436A (en) * | 1999-10-19 | 2002-10-30 | 韦尔豪泽公司 | Cationically modified polysaccharides |
| JP2010270263A (en) * | 2009-05-25 | 2010-12-02 | Hymo Corp | Aqueous dispersion liquid and method for promoting paper durability |
| CN108329425A (en) * | 2018-01-02 | 2018-07-27 | 江苏富淼科技股份有限公司 | A kind of emulsifier for alkenyl succinic anhydride |
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