CN114232384A - Biomass surface sizing agent and preparation method thereof - Google Patents
Biomass surface sizing agent and preparation method thereof Download PDFInfo
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- CN114232384A CN114232384A CN202111612081.7A CN202111612081A CN114232384A CN 114232384 A CN114232384 A CN 114232384A CN 202111612081 A CN202111612081 A CN 202111612081A CN 114232384 A CN114232384 A CN 114232384A
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- sizing agent
- surface sizing
- hemicellulose
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- 238000004513 sizing Methods 0.000 title claims abstract description 38
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 36
- 239000002028 Biomass Substances 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 229920002488 Hemicellulose Polymers 0.000 claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 229920000609 methyl cellulose Polymers 0.000 claims abstract description 12
- 239000001923 methylcellulose Substances 0.000 claims abstract description 12
- 235000010981 methylcellulose Nutrition 0.000 claims abstract description 12
- 230000001590 oxidative effect Effects 0.000 claims abstract description 12
- 239000007800 oxidant agent Substances 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 9
- 239000002904 solvent Substances 0.000 claims abstract description 9
- 239000003513 alkali Substances 0.000 claims abstract description 8
- 239000002253 acid Substances 0.000 claims abstract description 7
- 229920002678 cellulose Polymers 0.000 claims abstract description 6
- 239000001913 cellulose Substances 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 239000004014 plasticizer Substances 0.000 claims abstract description 5
- 150000005846 sugar alcohols Polymers 0.000 claims abstract description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 9
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 6
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 6
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 6
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 claims description 5
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 4
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 claims description 3
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 claims description 3
- 229920005862 polyol Polymers 0.000 claims description 3
- 150000003077 polyols Chemical class 0.000 claims description 3
- 239000000600 sorbitol Substances 0.000 claims description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 2
- 239000004327 boric acid Substances 0.000 claims description 2
- 229920002472 Starch Polymers 0.000 abstract description 15
- 235000019698 starch Nutrition 0.000 abstract description 15
- 239000008107 starch Substances 0.000 abstract description 14
- 239000002585 base Substances 0.000 abstract description 5
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 2
- 239000000123 paper Substances 0.000 description 14
- 239000000243 solution Substances 0.000 description 7
- 235000011121 sodium hydroxide Nutrition 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 229920005610 lignin Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- PYSRRFNXTXNWCD-UHFFFAOYSA-N 3-(2-phenylethenyl)furan-2,5-dione Chemical compound O=C1OC(=O)C(C=CC=2C=CC=CC=2)=C1 PYSRRFNXTXNWCD-UHFFFAOYSA-N 0.000 description 1
- 241000209504 Poaceae Species 0.000 description 1
- 229920000147 Styrene maleic anhydride Polymers 0.000 description 1
- 239000004164 Wax ester Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000011436 cob Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 235000019386 wax ester Nutrition 0.000 description 1
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
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; 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
- 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
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
-
- 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
- D21H17/25—Cellulose
- D21H17/26—Ethers 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
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
-
- 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
- D21H19/34—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising cellulose or derivatives thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Molecular Biology (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
Abstract
The invention provides a biomass surface sizing agent which comprises the following effective components in percentage by weight: 65-95% of oxidized hemicellulose, 3-25% of methyl cellulose and 2-10% of polyalcohol, wherein the sum of the weight percentages of the effective components is 100%. The preparation method comprises adding cellulose into appropriate amount of solvent, adding alkali to adjust pH to 9-11, heating to 40-70 deg.C, adding oxidant to perform oxidation reaction, adjusting pH to 5-7 with acid after reaction to obtain oxidized hemicellulose solution, continuously adding methylcellulose and plasticizer, heating to 80-95 deg.C, and decocting for 30-100 min; and cooling and discharging to obtain the biomass surface sizing agent. The invention has the advantage of good water resistance, can effectively improve the ring crush compression strength of the corrugated base paper, can completely replace a starch sizing agent, is environment-friendly and safe, realizes resource recycling and saves cost.
Description
Technical Field
The invention relates to the technical field of sizing agents for papermaking, in particular to a biomass surface sizing agent and a preparation method thereof.
Background
The ratio of low-quality raw materials such as grasses, waste paper and the like in the raw materials of the papermaking industry in China is increasing day by day, so that a large amount of papermaking additives are needed to improve indexes such as the physical strength of paper. The surface sizing agent is used for combining the fiber and the filler on the surface of the paper sheet so as to improve the strength and the stiffness of the paper sheet, reduce the phenomena of linting and dusting, improve the surface smoothness of the paper sheet and reduce the porosity.
Conventional sizing agents are modified and unmodified starches, polyvinyl alcohol (PVA), polyurethanes, styrene-maleic anhydride copolymers, acrylic acid and acrylate copolymers, and the like. The common starch sizing agent has wide sources, but the large logarithm of the starch is from grain crops, the price is increasing day by day, if the starch is used as the surface sizing agent completely, the cost is high for paper mills, and the starch latex has the characteristics of high viscosity, poor fluidity and unsatisfactory stability.
Hemicellulose is the second largest polysaccharide species in plant material, second only to cellulose, and accounts for 25% -40% of the total biomass of annual and perennial plants. Therefore, the hemicellulose is an abundant, inexhaustible and renewable plant resource.
Chinese patent CN109826048A discloses a surface sizing agent for papermaking, the effective components of which comprise 99.5-40% of component A and 0.5-60% of component B, the component A is starch; the component B comprises the following components in percentage by weight: cellulose 5-50%, lignin 15-35%, hemicellulose 10-28%, protein 0.6-5%, wax ester 0.5-3%, and silicon dioxide 5-25%. The strength of paper made by the surface sizing agent is improved, however, the formula still takes starch as a main component, the component B consisting of cellulose, lignin and the like can only partially replace the starch, and the strength of the paper is obviously reduced after the component B exceeds 60 percent.
Therefore, a need exists for a surface sizing agent which can completely replace a starch sizing agent and has good water resistance and can effectively improve the ring crush compression strength of corrugated base paper.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a modified hemicellulose composition and a preparation method thereof, so as to solve the technical problems in the prior art.
The invention is realized by adopting the following technical scheme:
the first aspect of the invention provides a biomass surface sizing agent, which comprises the following effective components in percentage by weight: 65-95% of oxidized hemicellulose, 3-25% of methyl cellulose and 2-10% of polyalcohol, wherein the sum of the weight percentages of the effective components is 100%.
Preferably, the oxidized hemicellulose refers to a product obtained by oxidizing hemicellulose under an alkaline condition, and is prepared by the following method: adding 100 parts of hemicellulose into a proper amount of solvent, adding alkali to adjust the pH value to 9-11, heating to 40-70 ℃, adding 5-15 parts of oxidant to perform oxidation reaction, and adjusting the pH value to 5-7 by using acid after the reaction is finished to obtain a solution containing oxidized hemicellulose.
Further preferably, the oxidant is one or more selected from hydrogen peroxide, hypochlorous acid and sodium hypochlorite.
The solvent may be water or an organic solvent, and is preferably N, N-Dimethylformamide (DMF), dimethylacetamide, dimethylsulfoxide, tetrahydrofuran or deionized water. The alkali is preferably sodium hydroxide, and for example, a 32% aqueous solution of sodium hydroxide is used. The acid can be one or more selected from sulfuric acid, hydrochloric acid, acetic acid and boric acid.
Preferably, the polyol is selected from one or more of glycerol, sorbitol, ethylene glycol.
The second aspect of the invention provides a preparation method of the biomass surface sizing agent, which comprises the following steps:
s1, adding cellulose into a proper amount of solvent, adding alkali to adjust the pH value to 9-11, heating to 40-70 ℃, adding an oxidant to perform an oxidation reaction, and adjusting the pH value to 5-7 with acid after the reaction is finished to obtain an oxidized hemicellulose solution;
s2, continuously adding methyl cellulose and a plasticizer into the oxidized hemicellulose solution, heating to 80-95 ℃, and decocting for 30-100 min; and cooling and discharging to obtain the biomass surface sizing agent.
Preferably, the components are as follows in parts by mass: 100 parts of hemicellulose, 5-15 parts of oxidant, 5-35 parts of methyl cellulose and 5-15 parts of plasticizer. More preferably, the amount of the solvent added is 1000-3000 parts.
Compared with the prior art, the invention has the beneficial effects that:
(1) the corrugated medium has the advantage of good water resistance, and can effectively improve the ring crush strength of the corrugated medium;
(2) the method is environment-friendly and safe, realizes resource recycling and saves cost;
(3) the starch sizing agent can be completely replaced, and the cost is further reduced;
(4) the surface sizing agent prepared by the invention has good compatibility with the starch sizing agent, can be used in a compounding way, and does not generate the problems of air bubbles, roller sticking and the like.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments described below are intended to be illustrative only and are not intended to be limiting as other obvious modifications may occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
The experimental instruments in the invention are not indicated by manufacturers, and are all conventional commercial instruments. The hemicellulose and the methylcellulose provided by the invention are provided by Jinming Ming Sheng new material company, and other raw materials are all commercially available products.
If the detection indexes related in the embodiment of the invention are not mentioned, the detection is carried out by adopting a conventional detection method in the field, and the specific index detection method is as follows:
determination of Cobb value: referring to sizing GB/T1540-2003 determination of water absorption of paper and paperboard, a British absorbency tester is adopted to test the paper sample to be tested.
And (3) ring crush strength measurement: and detecting the ring pressure strength of the paper pattern to be detected by adopting a computer measurement and control compression tester.
Example 1
1) Oxidizing hemicellulose:
adding 100g of hemicellulose into 2000g of deionized water, starting stirring, adding liquid alkali to adjust the pH value to 10, heating to 50 ℃, dropwise adding 5g of hydrogen peroxide to carry out oxidation reaction, and keeping the temperature for 0.5 h. After completion, the pH was adjusted to 6 with hydrochloric acid.
(2) Boiling glue:
adding 10g of methylcellulose and 10g of glycerol into the modified solution, heating to 80 ℃, and decocting for 100 min; and cooling to below 50 ℃ and discharging to obtain the biomass surface sizing agent.
Example 2
1) Firstly, 100g of hemicellulose is put into a container, 1000g of dimethylacetamide is added, stirring is started, liquid caustic soda is added to adjust the pH value to 11, the temperature is raised to 70 ℃, and the temperature is kept for 1h at the temperature; 10g of hypochlorous acid is dripped to carry out oxidation reaction and heat preservation for 1 h. After completion, the pH was adjusted to 6 with hydrochloric acid.
2) Adding 5g of methylcellulose and 15g of glycerol into the modified solution, heating to 90 ℃, and decocting for 100 min; and cooling to below 50 ℃ and discharging to obtain the biomass surface sizing agent.
Example 3
1) Firstly, 100g of hemicellulose is put into a container, 1300g of dimethylacetamide is added, stirring is started, liquid caustic soda is added to adjust the pH value to 11, the temperature is raised to 70 ℃, and the temperature is kept for 1h at the temperature; 15g of sodium hypochlorite is dripped for oxidation reaction and heat preservation for 1 h. After completion, the pH was adjusted to 6 with hydrochloric acid.
2) Adding 20g of methylcellulose and 15g of glycerol into the modified solution, heating to 90 ℃, and decocting for 100 min; and cooling to below 50 ℃ and discharging to obtain the biomass surface sizing agent.
Comparative example 1
Firstly, 100g of hemicellulose is put into a container, 1000g of dimethylacetamide is added, stirring is started, liquid caustic soda is added to adjust the pH value to 11, the temperature is raised to 70 ℃, and the temperature is kept for 1h at the temperature; dripping hypochlorous acid for oxidation reaction and keeping the temperature for 1 h. After completion, the pH was adjusted to 6 with hydrochloric acid.
Comparative example 2
Conventional starch sizing agents. Offered by Jinming dynasty, New materials, Inc.
Application examples
The sizing experiment of the sizing agent for each example and the comparative example is carried out on the corrugated base paper by using the coating roller, the corrugated base paper is placed into an oven with the temperature of 130-150 ℃ for curing for 10-30s, and the coating weight is 2g/m2. The specific measurement results are shown in table 1:
TABLE 1 paper pattern test index
From the above application results, it can be seen that: the invention can effectively improve the water absorption resistance and ring crush index of the corrugated base paper, and the biomass surface sizing agent prepared by the invention can replace the starch sizing agent by 100 percent due to the conventional starch sizing agent, thereby further reducing the production cost and realizing the reutilization of resources.
It will be appreciated by persons skilled in the art that the above examples are given by way of illustration only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.
Claims (10)
1. The biomass surface sizing agent is characterized by comprising the following effective components in percentage by weight: 65-95% of oxidized hemicellulose, 3-25% of methyl cellulose and 2-10% of polyalcohol, wherein the sum of the weight percentages of the effective components is 100%.
2. The biomass surface sizing agent according to claim 1, wherein the oxidized hemicellulose is prepared by the following method: adding 100 parts of hemicellulose into a proper amount of solvent, adding alkali to adjust the pH value to 9-11, heating to 40-70 ℃, adding 5-15 parts of oxidant to perform oxidation reaction, and adjusting the pH value to 5-7 by using acid after the reaction is finished to obtain a solution containing oxidized hemicellulose.
3. The biomass surface sizing agent according to claim 2, wherein the oxidant is selected from one or more of hydrogen peroxide, hypochlorous acid and sodium hypochlorite.
4. The biomass surface sizing agent according to claim 2, wherein the solvent is selected from the group consisting of N, N-dimethylformamide, dimethylacetamide, dimethylsulfoxide, tetrahydrofuran, and water.
5. The biomass surface sizing agent according to claim 1, wherein the polyol is selected from one or more of glycerol, sorbitol, and ethylene glycol.
6. The preparation method of the biomass surface sizing agent is characterized by comprising the following steps:
s1, adding cellulose into a proper amount of solvent, adding alkali to adjust the pH value to 9-11, heating to 40-70 ℃, adding an oxidant to perform an oxidation reaction, and adjusting the pH value to 5-7 with acid after the reaction is finished to obtain an oxidized hemicellulose solution;
s2, continuously adding methyl cellulose and a plasticizer into the oxidized hemicellulose solution, heating to 80-95 ℃, and decocting for 30-100 min; and cooling and discharging to obtain the biomass surface sizing agent.
7. The method of claim 6, wherein the components are in parts by weight as follows: 100 parts of hemicellulose, 5-15 parts of oxidant, 5-35 parts of methyl cellulose and 5-15 parts of plasticizer.
8. The method of claim 6, wherein the oxidant is selected from one or more of hydrogen peroxide, hypochlorous acid, and sodium hypochlorite.
9. The method of claim 6, wherein the solvent is selected from the group consisting of N, N-dimethylformamide, dimethylacetamide, dimethylsulfoxide, tetrahydrofuran, and water; the alkali is sodium hydroxide; the acid is selected from one or more of sulfuric acid, hydrochloric acid, acetic acid and boric acid.
10. The method of claim 6, wherein the polyol is selected from one or more of glycerol, sorbitol, and ethylene glycol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111612081.7A CN114232384A (en) | 2021-12-27 | 2021-12-27 | Biomass surface sizing agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111612081.7A CN114232384A (en) | 2021-12-27 | 2021-12-27 | Biomass surface sizing agent and preparation method thereof |
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Citations (4)
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|---|---|---|---|---|
| US20080039615A1 (en) * | 2006-08-11 | 2008-02-14 | Roman Skuratowicz | Oxidation of carbohydrate with ultraviolet radiation |
| CN101171389A (en) * | 2005-05-02 | 2008-04-30 | 国际纸业公司 | Ligno cellulosic materials and the products made therefrom |
| CN108026697A (en) * | 2015-09-17 | 2018-05-11 | 斯道拉恩索公司 | The top sizing of fine and close film |
| CN112982019A (en) * | 2021-03-22 | 2021-06-18 | 上海昶法新材料有限公司 | Preparation method of biomass surface sizing agent |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101171389A (en) * | 2005-05-02 | 2008-04-30 | 国际纸业公司 | Ligno cellulosic materials and the products made therefrom |
| US20080039615A1 (en) * | 2006-08-11 | 2008-02-14 | Roman Skuratowicz | Oxidation of carbohydrate with ultraviolet radiation |
| CN108026697A (en) * | 2015-09-17 | 2018-05-11 | 斯道拉恩索公司 | The top sizing of fine and close film |
| CN112982019A (en) * | 2021-03-22 | 2021-06-18 | 上海昶法新材料有限公司 | Preparation method of biomass surface sizing agent |
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Application publication date: 20220325 |