CN116289300A - Lignin rosin sizing agent, preparation method and application - Google Patents
Lignin rosin sizing agent, preparation method and application Download PDFInfo
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- CN116289300A CN116289300A CN202310134915.0A CN202310134915A CN116289300A CN 116289300 A CN116289300 A CN 116289300A CN 202310134915 A CN202310134915 A CN 202310134915A CN 116289300 A CN116289300 A CN 116289300A
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- lignin
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- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 title claims abstract description 145
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 title claims abstract description 145
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 title claims abstract description 145
- 229920005610 lignin Polymers 0.000 title claims abstract description 136
- 238000004513 sizing Methods 0.000 title claims abstract description 112
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 105
- 238000000034 method Methods 0.000 claims abstract description 36
- 239000000123 paper Substances 0.000 claims abstract description 35
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 238000004806 packaging method and process Methods 0.000 claims abstract description 32
- 239000011087 paperboard Substances 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 19
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 239000000839 emulsion Substances 0.000 claims description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 8
- 230000002209 hydrophobic effect Effects 0.000 abstract description 8
- 230000002195 synergetic effect Effects 0.000 abstract description 5
- 230000000052 comparative effect Effects 0.000 description 19
- 238000004519 manufacturing process Methods 0.000 description 15
- 239000002245 particle Substances 0.000 description 11
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 8
- 229920001131 Pulp (paper) Polymers 0.000 description 7
- 238000010009 beating Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 239000011436 cob Substances 0.000 description 6
- 238000013329 compounding Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- 239000002023 wood Substances 0.000 description 5
- 125000002091 cationic group Chemical group 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000003760 magnetic stirring Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000002390 rotary evaporation Methods 0.000 description 4
- 238000001132 ultrasonic dispersion Methods 0.000 description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 241000218631 Coniferophyta Species 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 231100000481 chemical toxicant Toxicity 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000005661 hydrophobic surface Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 230000009878 intermolecular interaction Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
Images
Classifications
-
- 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
- D21H17/23—Lignins
-
- 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
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/06—Alcohols; Phenols; Ethers; Aldehydes; Ketones; Acetals; Ketals
-
- 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
- D21H17/62—Rosin; Derivatives thereof
-
- 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
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/16—Sizing or water-repelling agents
-
- 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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/10—Packing paper
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Abstract
The invention discloses a preparation method of a lignin rosin sizing agent, which comprises the following steps: dissolving lignin and rosin in absolute ethyl alcohol, stirring and drying to obtain lignin rosin sizing agent powder, namely obtaining lignin rosin sizing agent; wherein the mass ratio of rosin to lignin is 1:0.25-4. The method of the invention creatively explores the synergistic hydrophobic effect of the green renewable lignin and rosin and applies the synergistic hydrophobic effect to the field of liquid packaging paper boards, and solves the problems of complex preparation process and low paper strength of the existing rosin sizing agent.
Description
Technical Field
The invention belongs to the technical field of rosin sizing agent processing, and particularly relates to a lignin rosin sizing agent, a preparation method and application.
Background
The sizing agent can endow paper or paper board with impermeability to ink, emulsion and water, and simultaneously improve the comprehensive properties of paper such as smoothness and the like. Rosin is the most predominant and desirable internal sizing agent in papermaking because of its low cost, good sizing effect, and high compatibility with pulp fibers and other sizing aids. In addition, china is the largest rosin production base in the world, and has unique advantages in terms of resources, so that research and development of rosin size sizing agents accords with the national conditions of China, and becomes an important research and development direction of papermaking sizing agents. The functional groups of rosin are mainly conjugated unsaturated double bonds and-COOH. In the rosin sizing process, polar carboxyl groups react with the surface of hydrophilic paper to orient nonpolar unsaturated double bonds to form a stable hydrophobic surface with reduced free energy.
However, the physical strength of paper is severely reduced due to the barrier effect of rosin between pulp fibers and the low retention of rosin, thereby affecting the application of the paper in practical production. Therefore, improving the strength performance of the paper formed after sizing by the rosin sizing agent is a problem to be solved in the field of sizing agents at present.
The patent application number 201310611305.1 discloses a novel cationic rosin sizing agent, wherein emulsion particles are stable in performance and remarkable in sizing effect when the sizing agent is used. However, the preparation process uses toxic chemicals such as styrene, epichlorohydrin and the like, and is not environment-friendly enough. Patent number application 201710694208.1 discloses an alkaline sizing agent in cationic rosin emulsion, which can improve the glossiness of paper, has good surface strength after sizing and remarkably improves the dry and wet strength. However, the preparation process is complex, the emulsion sizing agent has unstable performance and short storage time.
Therefore, it can be seen that the rosin sizing agent in the prior art cannot fully meet the needs of users, and therefore, there is a need for a rosin sizing agent which can ensure the strength of paper, has a simple and efficient preparation process, and can be stored for a long time.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a lignin rosin sizing agent, a preparation method and application.
The technical scheme adopted for solving the technical problems is as follows:
a method of preparing a lignin rosin sizing agent, the method comprising the steps of:
dissolving lignin and rosin in absolute ethyl alcohol, stirring and drying to obtain lignin rosin sizing agent powder, namely obtaining lignin rosin sizing agent;
wherein the mass ratio of rosin to lignin is 1:0.25-4.
Further, the mass ratio of rosin to lignin is 1:0.25, 1:0.5, 1:1, 1:2, 1:4.
Further, the stirring time is 10-60 min; the drying temperature is 50-90 ℃.
Further, the lignin is green renewable lignin.
The lignin rosin sizing agent prepared by the method is prepared.
The use of a lignin rosin sizing agent as described above in the preparation of liquid packaging board.
The method for manufacturing the liquid packaging paperboard base paper by using the lignin rosin sizing agent comprises the following steps:
(1) Dispersing lignin rosin sizing agent powder in water to prepare lignin rosin sizing agent emulsion;
(2) Adding the lignin rosin sizing agent emulsion into the slurry to make the liquid packaging paperboard base paper.
Further, in the step (1), the mass concentration of the lignin rosin sizing agent emulsion is 5-50%.
Further, in the step (2), the basis weight of the liquid packaging paperboard is 80-200 g/m 2 。
The invention has the advantages and positive effects that:
1. the method of the invention creatively explores the synergistic hydrophobic effect of the green renewable lignin and rosin and applies the synergistic hydrophobic effect to the field of liquid packaging paper boards, and solves the problems of complex preparation process and low paper strength of the existing rosin sizing agent.
2. The lignin rosin sizing agent disclosed by the invention is simple in preparation process, mild and controllable in reaction condition, easy to operate, suitable for large-scale manufacturing and wide in application prospect.
3. The invention provides a stable and sustainable way for lignin utilization.
Drawings
FIG. 1 is a graph of the surface tension versus lignin rosin size emulsion of the present invention at different rosin to lignin ratios;
FIG. 2 is a graph comparing particle size of lignin rosin sizing agent emulsions at different rosin to lignin ratios in accordance with the present invention; wherein, a is a graph of emulsion particle size contrast, b is an emulsion particle polydispersity index (PDI);
FIG. 3 is a plot of Zeta potential versus lignin rosin size emulsion at different rosin to lignin ratios in accordance with the present invention;
FIG. 4 is a graph showing the comparison of Cobb values of example 1 and comparative examples 1-5 in the present invention; wherein, the left graph is a comparison graph of the Cobb values of the example 1 and the comparative examples 1-5, and the right graph is a comparison graph of the Cobb values of the example 1 and the comparative examples 2, 3, 5;
FIG. 5 is a graph showing the contact angle comparison between example 1 and comparative examples 1-5 according to the present invention;
FIG. 6 is a graph showing the tensile index comparison of example 1 and comparative examples 1 to 5 in the present invention.
Detailed Description
The invention will now be further illustrated by reference to the following examples, which are intended to be illustrative, not limiting, and are not intended to limit the scope of the invention.
The various experimental operations involved in the specific embodiments are conventional in the art, and are not specifically noted herein, and may be implemented by those skilled in the art with reference to various general specifications, technical literature or related specifications, manuals, etc. before the filing date of the present invention.
A method of preparing a lignin rosin sizing agent, the method comprising the steps of:
dissolving lignin and rosin in absolute ethyl alcohol, stirring and drying to obtain lignin rosin sizing agent powder, namely obtaining lignin rosin sizing agent;
wherein the mass ratio of rosin to lignin is 1:0.25-4.
Preferably, the mass ratio of rosin to lignin is 1:0.25, 1:0.5, 1:1, 1:2, 1:4.
Preferably, the stirring time is 10-60 min; the drying temperature is 50-90 ℃.
Preferably, the lignin is green renewable lignin.
The lignin rosin sizing agent prepared by the method is prepared.
The use of a lignin rosin sizing agent as described above in the preparation of liquid packaging board.
The method for manufacturing the liquid packaging paperboard base paper by using the lignin rosin sizing agent comprises the following steps:
(1) Dispersing lignin rosin sizing agent powder in water to prepare lignin rosin sizing agent emulsion;
(2) Adding the lignin rosin sizing agent emulsion into the slurry to make the liquid packaging paperboard base paper.
Preferably, in the step (1), the mass concentration of the lignin rosin sizing agent emulsion is 5-50%.
Preferably, in the step (2), the basis weight of the liquid packaging paperboard is 80-200 g/m 2 。
Specifically, the preparation and detection of the correlation are as follows:
the lignin can be purchased from Shanghai microphone Biochemical technology Co., ltd, and the product number is L849279; rosin in the invention can be purchased from Shanghai Meilin Biochemical technology Co., ltd, and the product number is C832364. The aluminum sulfate in the invention can be purchased from Shanghai Michlin Biochemical technology Co., ltd, and the product number is A801783.
Example 1
A method of preparing a lignin rosin sizing agent, the method comprising the steps of:
preparing lignin rosin sizing agent powder:
and (3) putting 10g of rosin and 20g of lignin into 20ml of absolute ethyl alcohol, fully mixing, magnetically stirring the solution for 30 minutes, recovering the absolute ethyl alcohol by rotary evaporation after the completion of the magnetic stirring, and putting the remainder into a 50 ℃ oven for drying for 12 hours to prepare the lignin rosin sizing agent powder.
The method for manufacturing the base paper of the liquid packaging paperboard by using the lignin rosin sizing agent comprises the following steps:
(1) Preparing lignin rosin sizing agent emulsion:
1g of lignin rosin sizing agent powder is taken to be dispersed in 10g of deionized water, and the lignin rosin sizing agent emulsion with the concentration of 10% is prepared by ultrasonic dispersion for 30 minutes.
(2) Manufacturing of base paper of liquid packaging paper board:
and (3) selecting needle-leaved wood with the beating degree of 30 DEG SR, and compounding with mechanical pulp according to the mass ratio of 1:2. The pH of the slurry was adjusted to 5.5 with aluminum sulfate, then lignin rosin sizing agent emulsion was added, sheet was made on a rapid sheet former, and the basis weight of the liquid packaging board base paper was 160g/m 2 。
Example 2
A method of preparing a lignin rosin sizing agent, the method comprising the steps of:
preparing lignin rosin sizing agent powder:
and (3) putting 10g of rosin and 5g of lignin into 20ml of absolute ethyl alcohol, fully mixing, magnetically stirring the solution for 30 minutes, recovering the absolute ethyl alcohol by rotary evaporation after the completion of the magnetic stirring, and putting the remainder into a 50 ℃ oven for drying for 12 hours to prepare the lignin rosin sizing agent powder.
The method for manufacturing the base paper of the liquid packaging paperboard by using the lignin rosin sizing agent comprises the following steps:
(1) Preparing lignin rosin sizing agent emulsion:
1g of lignin rosin sizing agent powder is taken to be dispersed in 10g of deionized water, and the lignin rosin sizing agent emulsion with the concentration of 10% is prepared by ultrasonic dispersion for 30 minutes.
(2) Manufacturing of base paper of liquid packaging paper board:
selecting needle leaf wood with beating degree of 30 DEG SR according to qualityCompounding the mechanical pulp according to the ratio of the amount ratio of 1:2. The pH of the slurry was adjusted to 5.5 with aluminum sulfate, then lignin rosin sizing agent emulsion was added, sheet was made on a rapid sheet former, and the basis weight of the liquid packaging board base paper was 160g/m 2 。
Example 3
A method of preparing a lignin rosin sizing agent, the method comprising the steps of:
preparing lignin rosin sizing agent powder:
and (3) putting 10g of rosin and 10g of lignin into 20ml of absolute ethyl alcohol, fully mixing, magnetically stirring the solution for 30 minutes, recovering the absolute ethyl alcohol by rotary evaporation after the completion of the magnetic stirring, and putting the remainder into a 50 ℃ oven for drying for 12 hours to prepare the lignin rosin sizing agent powder.
The method for manufacturing the base paper of the liquid packaging paperboard by using the lignin rosin sizing agent comprises the following steps:
(1) Preparing lignin rosin sizing agent emulsion:
1g of lignin rosin sizing agent powder is taken to be dispersed in 10g of deionized water, and the lignin rosin sizing agent emulsion with the concentration of 10% is prepared by ultrasonic dispersion for 30 minutes.
(2) Manufacturing of base paper of liquid packaging paper board:
and (3) selecting needle-leaved wood with the beating degree of 30 DEG SR, and compounding with mechanical pulp according to the mass ratio of 1:2. The pH of the slurry was adjusted to 5.5 with aluminum sulfate, then lignin rosin sizing agent emulsion was added, sheet was made on a rapid sheet former, and the basis weight of the liquid packaging board base paper was 160g/m 2 。
Example 4
A method of preparing a lignin rosin sizing agent, the method comprising the steps of:
preparing lignin rosin sizing agent powder:
and (3) putting 10g of rosin and 40g of lignin into 20ml of absolute ethyl alcohol, fully mixing, magnetically stirring the solution for 30 minutes, recovering the absolute ethyl alcohol by rotary evaporation after the completion of the magnetic stirring, and putting the remainder into a 50 ℃ oven for drying for 12 hours to prepare the lignin rosin sizing agent powder.
The method for manufacturing the base paper of the liquid packaging paperboard by using the lignin rosin sizing agent comprises the following steps:
(1) Preparing lignin rosin sizing agent emulsion:
1g of lignin rosin sizing agent powder is taken to be dispersed in 10g of deionized water, and the lignin rosin sizing agent emulsion with the concentration of 10% is prepared by ultrasonic dispersion for 30 minutes.
(2) Manufacturing of base paper of liquid packaging paper board:
and (3) selecting needle-leaved wood with the beating degree of 30 DEG SR, and compounding with mechanical pulp according to the mass ratio of 1:2. The pH of the slurry was adjusted to 5.5 with aluminum sulfate, then lignin rosin sizing agent emulsion was added, sheet was made on a rapid sheet former, and the basis weight of the liquid packaging board base paper was 160g/m 2 。
FIG. 1 is a graph of surface tension versus lignin rosin size emulsion at different rosin to lignin ratios. The detection method comprises the following steps: the static surface tension of the lignin rosin sizing agent emulsion was measured at different rosin and lignin ratios using a surface interfacial tension meter using a hanging plate method at a constant temperature water bath of 25 ℃ and repeated 3 times for each sample.
FIG. 2 is a graph comparing particle size and polydispersity index (PDI) of lignin rosin size emulsions at different rosin to lignin ratios. The detection method comprises the following steps: the concentration of the solution with different rosin and lignin ratios is 5mg/mL, a proper amount of sample is taken and added into a sample cell, the measurement is carried out by using a Markov particle size analyzer at the room temperature of 25 ℃, and the measurement times are set to be three times.
FIG. 3 is a plot of Zeta potential versus lignin rosin size emulsion at different rosin to lignin ratios. The detection method comprises the following steps: the concentration of the solution with different rosin and lignin ratios is 5mg/mL, a proper amount of sample is taken and added into a sample cell, the measurement is carried out by using a Markov particle size analyzer at the room temperature of 25 ℃, and the measurement times are set to be three times.
As can be seen from fig. 1, the surface tension tends to stabilize as the lignin proportion in the lignin rosin sizing agent emulsion increases, and when the mass ratio of rosin to lignin is 1:2, the intermolecular interaction (electrostatic repulsive force) gradually decreases the lignin diffusion to the surface, so that the surface tension tends to stabilize. As shown by the particle size and PDI variation of the emulsion in fig. 2, the PDI value was lowest when the mass ratio of rosin to lignin was 1:2, indicating that the emulsion stability was optimal. In addition, the Zeta potential of the lignin rosin sizing agent emulsion was also tested at different rosin to lignin ratios and the results are shown in figure 3. Zeta potential is a measure of the strength of mutual repulsion or attraction between particles. The smaller the molecule or dispersed particle, the higher the absolute value of the Zeta potential, the more stable the system, i.e. the dissolution or dispersion can resist aggregation. From lignin structure analysis, the hydroxyl and carboxyl groups of the hydrophilic moiety make the Zeta potential of the emulsion negative. When the mass ratio of rosin to lignin is 1:2, the Zeta potential absolute value of the emulsion is more than 60mV, particles tend to repel each other, coalescence and other phenomena are not easy to occur, and the emulsion stability is excellent.
Comparative example 1
And (3) selecting needle-leaved wood with the beating degree of 30 DEG SR, and compounding with mechanical pulp according to the mass ratio of 1:2. The pH of the slurry was adjusted to 5.5 with aluminum sulfate, and then sheet was formed on a rapid sheet former with a basis weight of 160g/m for liquid packaging board stock 2 。
Comparative example 2
Rosin gum in a novel cationic rosin sizing agent disclosed in patent application No. 201310611305.1 is selected as comparative example 2, and an in-pulp papermaking experiment and a hydrophobicity detection experiment are performed in the same amount. The remaining papermaking steps were the same as in example 1.
Comparative example 3
Rosin gum in an alkaline sizing agent in a cationic rosin emulsion disclosed in patent application No. 201710694208.1 is selected as comparative example 3, and an in-pulp papermaking experiment and a hydrophobicity detection experiment are performed in the same amount. The remaining papermaking steps were the same as in example 1.
Comparative example 4
The method for manufacturing the liquid packaging paperboard base paper by using the sizing agent comprises the following steps:
(1) Preparation of sizing agent: 10g of lignin was put into 20ml of absolute ethanol and thoroughly mixed, and then the above solution was magnetically stirred for 30 minutes to thoroughly disperse lignin in the absolute ethanol solution, thereby obtaining lignin dispersion.
(2) And (3) selecting the conifer with the beating degree of 30 DEG, compounding with mechanical pulp according to the mass ratio of 1:2, and regulating the pH value of the pulp to 5.5 by using aluminum sulfate. Then adding lignin dispersion liquid, making sheet on a rapid paper former, and the ration of the base paper of the liquid packaging paperboard is 160g/m 2 。
Comparative example 5
The method for manufacturing the liquid packaging paperboard base paper by using the sizing agent comprises the following steps:
(1) Preparation of sizing agent: 10g of rosin was put into 20ml of absolute ethanol and thoroughly mixed, and then the above solution was magnetically stirred for 30 minutes to thoroughly dissolve the rosin into the absolute ethanol solution, thereby obtaining a rosin solution.
(2) And (3) selecting the conifer with the beating degree of 30 DEG, compounding with mechanical pulp according to the mass ratio of 1:2, and regulating the pH value of the pulp to 5.5 by using aluminum sulfate. Then adding rosin solution, making sheet on a rapid paper sheet former, and the ration of the base paper of the liquid packaging paperboard is 160g/m 2 。
The Cobb value was compared with the lignin rosin sizing agent prepared in example 1, and the test results are shown in fig. 4. The testing method comprises the following steps: paper bob (Cobb) values were determined according to standard GB/T1540-2002 using an automatic Cobb value tester model 61-67 (TMI company, usa).
The contact angle comparison was made with the lignin rosin sizing agent prepared in example 1 and the test results are shown in fig. 5. The testing method comprises the following steps: the contact angle was measured according to standard ISO/TS14778:2021 using a PGX-type dynamic contact angle meter (FIBRO, sweden).
The tensile index was compared with the lignin rosin sizing agent prepared in example 1, and the test results are shown in fig. 6. The testing method comprises the following steps: the tensile index was measured and calculated according to QB/T1053-2004 using a tensile Strength Instrument model 066 (Swedish L & W).
The hydrophobicity test results are shown in fig. 4 and 5. Comparative example 1 has no hydrophobic effect compared to the lignin rosin size prepared in example 1. The sizing agents prepared in comparative examples 2 and 3 were less hydrophobic than example 1. In comparative example 4, only lignin was added without a hydrophobic effect. Although the comparative example 5 has good hydrophobic effect by adding rosin only, the preparation process needs to be dissolved by solvent, the solvent cannot be recovered, and certain environmental protection exists.
As shown in FIG. 6, the strength properties of the sizing agents prepared in comparative examples 1 to 3 were lower than those of example 1. The addition of lignin alone in comparative example 4 can significantly improve the strength properties of the paper. The addition of rosin alone in comparative example 5 significantly reduces the strength properties of the paper.
Therefore, the lignin rosin sizing agent prepared by the method has synergistic effect between lignin and rosin, and can effectively improve the hydrophobicity and strength of finished paper.
In summary, the invention discloses a preparation method of a lignin rosin sizing agent, and the prepared sizing agent not only has excellent hydrophobicity, but also can improve the strength performance of paper, and the preparation process is green and efficient, and can be applied to liquid packaging paperboards.
Although embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the disclosure of the embodiments.
Claims (9)
1. A preparation method of a lignin rosin sizing agent is characterized by comprising the following steps: the method comprises the following steps:
dissolving lignin and rosin in absolute ethyl alcohol, stirring and drying to obtain lignin rosin sizing agent powder, namely obtaining lignin rosin sizing agent;
wherein the mass ratio of rosin to lignin is 1:0.25-4.
2. The method for preparing the lignin rosin sizing agent according to claim 1, wherein: the mass ratio of the rosin to the lignin is 1:0.25, 1:0.5, 1:1, 1:2 and 1:4.
3. The method for preparing the lignin rosin sizing agent according to claim 1, wherein: the stirring time is 10-60 min; the drying temperature is 50-90 ℃.
4. A method of preparing a lignin rosin sizing agent according to any one of claims 1 to 3 wherein: the lignin is green renewable lignin.
5. A lignin rosin sizing agent prepared according to the method of any one of claims 1 to 4.
6. Use of the lignin rosin sizing agent according to claim 5 in the preparation of liquid packaging board.
7. A method for making a liquid packaging board base paper using the lignin rosin sizing agent according to claim 5, characterized by: the method comprises the following steps:
(1) Dispersing lignin rosin sizing agent powder in water to prepare lignin rosin sizing agent emulsion;
(2) Adding the lignin rosin sizing agent emulsion into the slurry to make the liquid packaging paperboard base paper.
8. The method according to claim 7, wherein: in the step (1), the mass concentration of the lignin rosin sizing agent emulsion is 5-50%.
9. The method according to claim 7 or 8, characterized in that: in the step (2), the basis weight of the liquid packaging paperboard is 80-200 g/m 2 。
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5972094A (en) * | 1996-05-24 | 1999-10-26 | Hercules Incorporated | Sizing composition |
| CN1817994A (en) * | 2006-02-07 | 2006-08-16 | 福州大学 | Modified rosin resin with high-boiling point alcohol lignin and its derivative and production thereof |
| CN105862508A (en) * | 2016-05-12 | 2016-08-17 | 广西融水闽兴树脂有限公司 | Preparation method of rosin sizing agent |
| CN105970720A (en) * | 2016-05-12 | 2016-09-28 | 广西融水闽兴树脂有限公司 | Rosin sizing agent |
| CN107630387A (en) * | 2017-08-14 | 2018-01-26 | 龙游富田造纸精化有限公司 | A kind of cation colophony emulsion neutral-to-alkaline sizing agents and preparation method thereof |
-
2023
- 2023-02-20 CN CN202310134915.0A patent/CN116289300A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5972094A (en) * | 1996-05-24 | 1999-10-26 | Hercules Incorporated | Sizing composition |
| CN1817994A (en) * | 2006-02-07 | 2006-08-16 | 福州大学 | Modified rosin resin with high-boiling point alcohol lignin and its derivative and production thereof |
| CN105862508A (en) * | 2016-05-12 | 2016-08-17 | 广西融水闽兴树脂有限公司 | Preparation method of rosin sizing agent |
| CN105970720A (en) * | 2016-05-12 | 2016-09-28 | 广西融水闽兴树脂有限公司 | Rosin sizing agent |
| CN107630387A (en) * | 2017-08-14 | 2018-01-26 | 龙游富田造纸精化有限公司 | A kind of cation colophony emulsion neutral-to-alkaline sizing agents and preparation method thereof |
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