CN116289293A - Degradable straw base paper and manufacturing method thereof - Google Patents
Degradable straw base paper and manufacturing method thereof Download PDFInfo
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- CN116289293A CN116289293A CN202211418565.2A CN202211418565A CN116289293A CN 116289293 A CN116289293 A CN 116289293A CN 202211418565 A CN202211418565 A CN 202211418565A CN 116289293 A CN116289293 A CN 116289293A
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- pulp
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- polylactic acid
- polyethylene glycol
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- 238000004519 manufacturing process Methods 0.000 title abstract description 11
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 134
- 239000004626 polylactic acid Substances 0.000 claims abstract description 134
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 124
- 241000609240 Ambelania acida Species 0.000 claims abstract description 123
- 239000010905 bagasse Substances 0.000 claims abstract description 123
- 150000001875 compounds Chemical class 0.000 claims abstract description 105
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 84
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- 238000002360 preparation method Methods 0.000 claims abstract description 68
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- 239000001254 oxidized starch Substances 0.000 claims description 60
- 235000013808 oxidized starch Nutrition 0.000 claims description 60
- 150000002148 esters Chemical class 0.000 claims description 55
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 54
- 229920001817 Agar Polymers 0.000 claims description 48
- 239000008272 agar Substances 0.000 claims description 48
- 238000004537 pulping Methods 0.000 claims description 30
- 239000001341 hydroxy propyl starch Substances 0.000 claims description 27
- 235000013828 hydroxypropyl starch Nutrition 0.000 claims description 27
- 229920001046 Nanocellulose Polymers 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 5
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- 235000013305 food Nutrition 0.000 claims description 2
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- 238000006731 degradation reaction Methods 0.000 abstract description 23
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- 239000002131 composite material Substances 0.000 description 36
- 238000003756 stirring Methods 0.000 description 25
- 239000002939 oilproofing Substances 0.000 description 21
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- 238000005259 measurement Methods 0.000 description 18
- 238000001035 drying Methods 0.000 description 17
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- 240000003183 Manihot esculenta Species 0.000 description 12
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- 238000002791 soaking Methods 0.000 description 11
- 238000012360 testing method Methods 0.000 description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- GUOCOOQWZHQBJI-UHFFFAOYSA-N 4-oct-7-enoxy-4-oxobutanoic acid Chemical compound OC(=O)CCC(=O)OCCCCCCC=C GUOCOOQWZHQBJI-UHFFFAOYSA-N 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
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- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 2
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- 239000000126 substance Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
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- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
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- LUEWUZLMQUOBSB-GFVSVBBRSA-N mannan Chemical class O[C@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1O[C@@H]1[C@@H](CO)O[C@@H](O[C@@H]2[C@H](O[C@@H](O[C@H]3[C@H](O[C@@H](O)[C@@H](O)[C@H]3O)CO)[C@@H](O)[C@H]2O)CO)[C@H](O)[C@H]1O LUEWUZLMQUOBSB-GFVSVBBRSA-N 0.000 description 1
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Images
Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/02—Methods of beating; Beaters of the Hollander type
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
-
- 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
-
- 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
- D21H17/36—Polyalkenyalcohols; Polyalkenylethers; Polyalkenylesters
-
- 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
- D21H21/06—Paper forming aids
- D21H21/10—Retention agents or drainage improvers
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
Abstract
The invention discloses degradable straw base paper and a manufacturing method thereof, which belong to the technical field of base paper preparation, and in particular relates to a degradable straw base paper which is prepared by adding bagasse pulp A pulp board into distilled water to prepare pulp, and then under the action of various functional agents, wherein the functional agents at least comprise an oil-proof agent, a waterproof agent and a retention aid, and the functional agents also comprise a nano cellulose-polyethylene glycol compound or a polylactic acid compound or sizing liquid. The degradable straw base paper prepared by the invention has good tensile strength, good tearing degree and good degradation performance, the tensile strength of the obtained degradable straw base paper is more than 1.8KN/m, the tearing degree is more than 400mN, and the degradation loss rate is more than 6.5%.
Description
Technical Field
The invention belongs to the technical field of raw paper preparation, and particularly relates to degradable straw raw paper and a manufacturing method thereof.
Background
In recent years, foamed plastic products are increasingly widely used, so that white pollution is increasingly serious, landfill, incineration and the like are generally adopted in a white pollution method, but substances such as fluorine, chlorine, carbide and the like contained in the foamed plastic products can generate substances which destroy an atmospheric ozone layer after incineration; the landfill treatment not only wastes a large amount of land, but also is difficult to naturally degrade, easily pollutes water quality and prevents the development of agriculture, so that the ecological environment on which human beings depend to live is seriously damaged, the health of the human beings is also damaged, and the finding of a catering product which can replace foamed plastic products, is excellent in quality, low in price and environment-friendly, such as a straw, becomes a necessary trend of social development. The paper is used for replacing plastic, so that plant fiber raw materials with rich content, low price and short regeneration period in natural environment can be fully utilized, and the produced paper product is easy to degrade and can be recycled, thus being considered as the most effective substitute of plastic.
The paper tableware is made up by using herbal pulp of reed and bagasse as main raw material, adding about 30% of wood pulp and some water-proofing and oil-proofing auxiliary agents, etc. and placing the mixed raw material into a forming machine die with a certain shape, and adopting the procedures of compression forming, heating drying and press-polishing forming. The paper pulp molding tableware has the advantages of attractive appearance, oil resistance, water resistance, high temperature resistance, no leakage, good air permeability, toughness and strength, sanitation, no toxicity, recycling, quick natural degradation, simple production process flow, small occupied area of a factory building, small investment scale and quick response, and is a product with the largest production capacity and the largest production enterprises in the existing alternatives of the foaming tableware.
Disclosure of Invention
The invention aims to provide degradable straw base paper with good tensile strength, good tearing degree and good degradation performance and a manufacturing method thereof.
The technical scheme adopted by the invention for achieving the purpose is as follows:
a degradable base paper comprising: the base paper is prepared from bagasse pulp as a main material, wherein the base paper contains a functional agent, and the functional agent comprises a nano cellulose-polyethylene glycol compound or a polylactic acid compound or sizing liquid; the nano cellulose-polyethylene glycol compound is prepared from nano cellulose and polyethylene glycol in a solution, the polylactic acid compound is prepared from the nano cellulose-polyethylene glycol compound and polylactic acid in a solvent, and the sizing solution contains octenyl succinic acid oxidized starch ester and agar. In the preparation of the degradable base paper, the nano cellulose and the polyethylene glycol can be compounded to prepare the compound and then applied to the preparation of the base paper, or the nano cellulose-polyethylene glycol compound and the polylactic acid can be further mixed to prepare the polylactic acid compound, when the compound is applied to the base paper prepared from bagasse pulp, the compound and the bagasse pulp are subjected to the treatment of fluffing, pulping and pulping together, so that all the components are fully separated and compounded to form close mutual combination, and after the pulping is finished, other functional agents are added, the base paper with better performance is prepared through the subsequent procedures, and has good tensile strength, tearing degree and degradation performance. When the nanocellulose-polyethylene glycol compound and polylactic acid are used as a group, the use effect is weaker than that of a polylactic acid compound prepared from the nanocellulose-polyethylene glycol compound and polylactic acid, which shows that when the nanocellulose-polyethylene glycol compound and the polylactic acid are subjected to fluffing, pulping and pulping together with bagasse pulp, the nanocellulose-polyethylene glycol compound and the polylactic acid are firstly treated to form a compound, and then the mutual combination effect is better, and when the nanocellulose-polyethylene glycol compound and the polylactic acid are added separately, the mutual combination effect is weaker, so that the performance of the obtained base paper is weaker. When the sizing solution is used together with oil-proof agent, water-proof agent and other functional agent, the octenyl succinic acid oxidized starch ester in the sizing solution and the fiber in the sizing solution of the agar and bagasse pulp interact, so that the obtained base paper has a fine structure, the tensile strength and tearing degree of the base paper are improved, and the base paper has good degradation performance.
Preferably, the functional agent includes a water repellent agent, an oil repellent agent, and a retention aid.
Preferably, the functional agent comprises at least a polylactic acid complex and a sizing liquid.
Preferably, the functional agent comprises hydroxypropyl starch ether. In the process of preparing the base paper, the hydroxypropyl starch ether interacts with other components of the functional agent in the preparation of the base paper, has good combination effect, ensures that the combination of the functional agent and the slurry of bagasse pulp is better, and improves the tensile strength, the tearing degree and the degradation performance of the base paper.
The invention discloses a preparation method of the degradable base paper, which comprises the following steps:
swelling bagasse pulp in distilled water, fluffing, pulping to prepare pulp, and adding a functional agent in the process of preparing the pulp; the functional agent comprises a nanocellulose-polyethylene glycol compound or a polylactic acid compound or a sizing liquid; the nano cellulose-polyethylene glycol compound is prepared from nano cellulose and polyethylene glycol in a solution, the polylactic acid compound is prepared from the nano cellulose-polyethylene glycol compound and polylactic acid in a solvent, and the sizing solution contains octenyl succinic acid oxidized starch ester and agar;
and (3) making the prepared sizing agent into degradable base paper by papermaking and oil pressure.
Preferably, the usage amount of the nanocellulose-polyethylene glycol compound is 0.42-0.83wt% of the bagasse pulp A pulp board, and the usage amount of the polylactic acid is 2.08-4.17wt% of the bagasse pulp A pulp board.
Preferably, the polylactic acid compound is used in an amount of 2.5 to 5wt% of the bagasse pulp A pulp sheet.
Preferably, the functional agent comprises a waterproof agent, an oil-proof agent and a retention aid, wherein the oil-proof agent is used in an amount of 1-3wt% of the bagasse pulp A pulp board, the waterproof agent is used in an amount of 3-7wt% of the bagasse pulp A pulp board, and the retention aid is used in an amount of 0.02-0.08wt% of the bagasse pulp A pulp board.
Preferably, the octenyl succinic acid oxidized starch ester is used in the sizing solution in an amount of 100-900wt% of the agar.
Preferably, in the preparation of the degradable base paper, the bagasse pulp A pulp board is added into distilled water for soaking, after the pulp board is fully swelled, the dissociator is fluffed, then pulp is ground and pulped through a PFI pulp grinder to obtain pulp, the pulped pulp is fluffed in a fiber separator, then an oil-proof agent, a water-proof agent and a retention aid are added, a wet paper web is manufactured through pulp making, the wet paper web is squeezed through an oil press, and then is dried at 110-130 ℃ and then is processed for 12-48 hours in a constant temperature and humidity chamber, and the degradable base paper is obtained.
More preferably, in the preparation of the degradable base paper, the bagasse pulp A pulp sheet is used in an amount of 6-15wt% of distilled water.
More preferably, in the preparation of the degradable base paper, the oil-proofing agent is Solvera PT5045 based on the amount of the bagasse pulp A pulp board in the pulp, and the use amount of the oil-proofing agent is 1-3wt% of the bagasse pulp A pulp board.
More preferably, in the preparation of the degradable base paper, the amount of the waterproof agent is AKD based on the amount of the bagasse pulp A pulp board in the pulp, and the use amount of the waterproof agent is 3-7wt% of the bagasse pulp A pulp board.
More preferably, in the preparation of the degradable base paper, the retention aid is APAM based on the amount of the bagasse pulp A pulp board in the pulp, and the use amount of the retention aid is 0.02-0.08wt% of the bagasse pulp A pulp board.
More preferably, hydroxypropyl starch ether is added in the preparation of the degradable base paper, the use amount of the hydroxypropyl starch ether is 0.2 to 0.6 weight percent of the bagasse pulp A pulp board,
preferably, the preparation of the degradable base paper comprises the preparation of a nanocellulose-polyethylene glycol complex.
Preferably, in the preparation of the nanocellulose-polyethylene glycol compound, polyethylene glycol is added into distilled water, stirred and dissolved, nanocellulose is added, ultrasonic dispersion is carried out, stirring is carried out for 1-3 hours at 20-40 ℃, stirring treatment is carried out for 1-3 hours at 80-90 ℃, and finally vacuum drying is carried out, thus obtaining the nanocellulose-polyethylene glycol compound.
More preferably, in the preparation of the nanocellulose-polyethylene glycol complex, the polyethylene glycol is used in an amount of 10-20wt% of distilled water.
More preferably, the nanocellulose is used in an amount of 20-60wt% of polyethylene glycol in the preparation of nanocellulose-polyethylene glycol complex.
Preferably, the preparation of the degradable base paper comprises the preparation of polylactic acid compound.
Preferably, in the preparation of the polylactic acid compound, polylactic acid is added into chloroform and stirred and dissolved at 20-40 ℃ to obtain polylactic acid solution; adding the nanocellulose-polyethylene glycol complex into chloroform, and homogenizing for 10-30min to obtain a complex homogeneous solution; adding the composite homogeneous solution into polylactic acid solution, stirring and mixing, performing ultrasonic treatment in ice-water bath for 10-30min to uniformly disperse and mix the solution, and drying to obtain polylactic acid compound.
More preferably, in the preparation of the polylactic acid composite, the polylactic acid solution contains 4 to 12 weight percent of polylactic acid.
More preferably, in the preparation of the polylactic acid compound, the compound homogeneous solution contains 5-15wt% of the nanocellulose-polyethylene glycol compound.
More preferably, in the preparation of the polylactic acid composite, when the polylactic acid solution is mixed with the composite homogeneous solution, the polylactic acid in the polylactic acid solution and the nanocellulose-polyethylene glycol composite in the composite homogeneous solution are taken as the measurement standard, so that the dosage of the nanocellulose-polyethylene glycol composite in the mixing of the polylactic acid solution and the composite homogeneous solution is 10-25wt% of the polylactic acid.
Preferably, the preparation of the polylactic acid compound comprises the preparation of octenyl succinic acid oxidized starch ester and the preparation of sizing liquid.
Preferably, in the preparation of the octenyl succinic acid oxidized starch ester, oxidized tapioca starch is added into distilled water, starch emulsion is obtained by mixing, octenyl succinic acid solution is dropwise added under stirring at 30-40 ℃, the pH is regulated to 8-9, the reaction is carried out for 2-5h, the pH is regulated to 6-7 after the reaction is finished, distilled water washing, 95% ethanol washing, drying and crushing are carried out, and the octenyl succinic acid oxidized starch ester is obtained.
Preferably, in the preparation of the octenyl succinic acid oxidized starch ester, the starch emulsion contains 20-40wt% of oxidized tapioca starch.
Preferably, in the preparation of the oxidized starch octenyl succinate, the octenyl succinic acid solution contains 20-30wt% of octenyl succinic acid.
Preferably, in the preparation of the octenyl succinic acid oxidized starch ester, when the octenyl succinic acid solution is dripped into the starch emulsion, octenyl succinic acid in the octenyl succinic acid solution and oxidized tapioca starch in the starch emulsion are used as the metering reference, so that the octenyl succinic acid solution is dripped into the starch emulsion, and the use amount of the octenyl succinic acid is 3-12wt% of the oxidized tapioca starch.
Preferably, in the preparation of sizing liquid, oxidized starch octenyl succinate is added into distilled water to be mixed to prepare starch suspension, and the starch suspension is stirred for 5 to 30min and then stirred for 20 to 60min at the temperature of 90 to 95 ℃ until no obvious precipitation is caused, so as to obtain starch solution; adding agar into distilled water, and stirring at 60-80deg.C for 20-60min to obtain agar solution; mixing the starch solution and the agar solution, and stirring and mixing at 60-80deg.C to obtain the sizing solution.
More preferably, the sizing solution is prepared with 10 to 30wt% oxidized starch octenyl succinate in the starch solution.
More preferably, the sizing solution is prepared with 10-25wt% of agar in the agar solution.
More preferably, in the preparation of the sizing solution, the starch solution and the agar solution are mixed based on the octenyl succinic acid oxidized starch ester in the starch solution and the agar in the agar solution, so that the octenyl succinic acid oxidized starch ester is used in an amount of 100-900wt% of the agar in the starch solution and the agar solution.
More preferably, the nano cellulose-polyethylene glycol compound and the polylactic acid are added in the preparation of the degradable base paper, the usage amount of the nano cellulose-polyethylene glycol compound is 0.42-0.83wt% of the bagasse pulp A pulp board, and the usage amount of the polylactic acid is 2.08-4.17wt% of the bagasse pulp A pulp board.
More preferably, the polylactic acid compound is added in the preparation of the degradable base paper, and the use amount of the polylactic acid compound is 2.5-5wt% of the bagasse pulp A pulp board.
More preferably, the sizing solution is added in the preparation of the degradable base paper, the dry amount of the octenyl succinic acid oxidized starch ester is taken as a metering standard, and in the use of the sizing solution, the use amount of the octenyl succinic acid oxidized starch ester is 1-3wt% of the bagasse pulp A pulp board.
More preferably, the konjak mannan is added in the preparation of the degradable base paper, and the usage amount of the konjak mannan is 0.3-0.9wt% of the bagasse pulp A pulp board. In the process of preparing the base paper, researches show that the tensile strength, the tearing degree and the degradation performance of the base paper can be further improved by further adding some konjak mannan.
The invention discloses application of the degradable base paper in preparing food packaging paper and/or a straw.
The bagasse pulp A pulp board is added into distilled water to prepare pulp, and then the degradable straw base paper is prepared under the action of various functional agents, wherein the functional agents at least comprise nanocellulose-polyethylene glycol compound or polylactic acid compound or sizing liquid, so that the invention has the following beneficial effects: the degradable straw base paper prepared by the invention has good tensile strength, good tearing degree and good degradation performance, the tensile strength of the obtained degradable straw base paper is more than 1.8KN/m, the tearing degree is more than 400mN, and the degradation loss rate is more than 6.5%. Therefore, the invention is a degradable straw base paper with good tensile strength, good tearing degree and good degradation performance and a manufacturing method thereof.
Drawings
FIG. 1 is an electron microscope image of a degradable straw base paper;
FIG. 2 is a graph of tensile strength of a degradable straw base paper;
FIG. 3 is a graph of tear strength of a degradable straw base paper;
FIG. 4 is a graph showing degradation loss rate of a degradable straw base paper.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the specific embodiments and the attached drawings:
example 1:
a preparation method of degradable straw base paper,
preparation of nanocellulose-polyethylene glycol complex: adding polyethylene glycol into distilled water, stirring for dissolving, adding nanocellulose, performing ultrasonic dispersion, stirring at 30 ℃ for 2 hours, stirring at 90 ℃ for 2 hours, and finally performing vacuum drying to obtain the nanocellulose-polyethylene glycol compound. The polyethylene glycol is 15wt% of distilled water, and the nanocellulose is 40wt% of the polyethylene glycol.
Preparing straw base paper: adding the bagasse pulp A pulp board, the nanocellulose-polyethylene glycol compound and the polylactic acid into distilled water for soaking, after the pulp board is fully swelled, fluffing by a dissociator, then pulping and pulping by a PFI pulping machine to obtain pulp, fluffing the pulped pulp in a fiber separator, then adding an oil-proof agent, a water-proof agent and a retention aid, pulping to prepare a wet paper web, squeezing by an oil press, drying at 120 ℃, and then treating for 24 hours in a constant temperature and humidity chamber to obtain straw base paper. The consumption of the bagasse pulp A pulp board is 10wt% of distilled water, the consumption of the nanocellulose-polyethylene glycol compound is 0.5wt% of the bagasse pulp A pulp board, the consumption of polylactic acid is 2.5wt% of the bagasse pulp A pulp board, the consumption of the bagasse pulp A pulp board in the pulp is used as a metering standard, the oil-proofing agent is Solvera PT5045, the consumption of the oil-proofing agent is 2wt% of the bagasse pulp A pulp board, the waterproof agent is AKD, the consumption of the waterproof agent is 5wt% of the bagasse pulp A pulp board, the retention aid is APAM, and the consumption of the retention aid is 0.04wt% of the bagasse pulp A pulp board.
Example 2:
a preparation method of degradable straw base paper,
preparation of nanocellulose-polyethylene glycol complex: adding polyethylene glycol into distilled water, stirring for dissolving, adding nanocellulose, performing ultrasonic dispersion, stirring at 30 ℃ for 2 hours, stirring at 90 ℃ for 2 hours, and finally performing vacuum drying to obtain the nanocellulose-polyethylene glycol compound. The polyethylene glycol is 15wt% of distilled water, and the nanocellulose is 40wt% of the polyethylene glycol.
Preparation of polylactic acid compound: adding polylactic acid into chloroform, stirring and dissolving at 30 ℃ to obtain polylactic acid solution; adding the nanocellulose-polyethylene glycol complex into chloroform, and homogenizing for 20min to obtain a complex homogeneous solution; adding the composite homogeneous solution into the polylactic acid solution, stirring and mixing, carrying out ultrasonic treatment in an ice-water bath for 20min to uniformly disperse and mix the solution, and drying to obtain the polylactic acid composite. The polylactic acid solution contains 8 weight percent of polylactic acid, the composite homogeneous solution contains 10 weight percent of nano cellulose-polyethylene glycol compound, and when the polylactic acid solution is mixed with the composite homogeneous solution, the polylactic acid in the polylactic acid solution and the nano cellulose-polyethylene glycol compound in the composite homogeneous solution are taken as the measurement standard, so that the dosage of the nano cellulose-polyethylene glycol compound is 20 weight percent of the polylactic acid in the mixing of the polylactic acid solution and the composite homogeneous solution.
Preparing straw base paper: adding the bagasse pulp A pulp board and the polylactic acid compound into distilled water for soaking, after the pulp board is fully swelled, defibering by a dissociator, pulping by a PFI pulping machine to obtain pulp, defibering the pulped pulp in a fiber separator, adding an oil-proof agent, a waterproofing agent and a retention aid, making a wet paper web, squeezing by an oil press, drying at 120 ℃, and processing for 24 hours in a constant temperature and humidity chamber to obtain straw base paper. The consumption of the bagasse pulp A pulp board is 10wt% of distilled water, the consumption of the polylactic acid compound is 3wt% of the bagasse pulp A pulp board, the consumption of the bagasse pulp A pulp board in the pulp is used as a measurement standard, the oil-proofing agent is Solvera PT5045, the consumption of the oil-proofing agent is 2wt% of the bagasse pulp A pulp board, the water-proofing agent is AKD, the consumption of the water-proofing agent is 5wt% of the bagasse pulp A pulp board, the retention aid is APAM, and the consumption of the retention aid is 0.04wt% of the bagasse pulp A pulp board.
Example 3:
a preparation method of degradable straw base paper,
preparation of oxidized starch octenyl succinate: adding oxidized tapioca starch into distilled water, mixing to obtain starch emulsion, dropwise adding octenyl succinic acid solution under stirring at 40 ℃, adjusting pH to 8.5, reacting for 3h, adjusting pH to 6.5 after the reaction is completed, washing with distilled water, washing with 95% ethanol, drying, and pulverizing to obtain octenyl succinic acid oxidized starch ester. The starch emulsion contains 30 weight percent of oxidized tapioca starch, the octenyl succinic acid solution contains 30 weight percent of octenyl succinic acid, when the octenyl succinic acid solution is dripped into the starch emulsion, the octenyl succinic acid in the octenyl succinic acid solution and the oxidized tapioca starch in the starch emulsion are used as the measurement standard, so that the octenyl succinic acid solution is dripped into the starch emulsion, and the use amount of the octenyl succinic acid is 8 weight percent of the oxidized tapioca starch.
Preparation of sizing solution: adding octenyl succinic acid oxidized starch ester into distilled water, mixing to prepare starch suspension, stirring for 20min, and stirring at 95 ℃ for 30min, wherein no obvious precipitation is caused, so as to obtain starch solution; adding agar into distilled water, and stirring at 70deg.C for 30min to obtain agar solution; mixing the starch solution and the agar solution, and stirring and mixing at 70 ℃ to obtain the sizing solution. The starch solution contains 20wt% of octenyl succinic acid oxidized starch ester, the agar solution contains 15wt% of agar, and in the mixing of the starch solution and the agar solution, the octenyl succinic acid oxidized starch ester in the starch solution and the agar in the agar solution are used as measurement references, so that in the mixing of the starch solution and the agar solution, the use amount of the octenyl succinic acid oxidized starch ester is 500wt% of the agar.
Preparing straw base paper: adding the bagasse pulp A pulp board into distilled water for soaking, after the pulp board is fully swelled, defibering by a dissociator, pulping and pulping by a PFI pulping machine to obtain pulp, defibering the pulped pulp in a fiber separator, adding an oil-proof agent, a waterproofing agent, a sizing agent and a retention aid, making into a wet paper web, squeezing by an oil press, drying at 120 ℃, and treating for 24 hours in a constant temperature and humidity chamber to obtain straw base paper. The consumption of the bagasse pulp A pulp board is 10wt% of distilled water, the consumption of the bagasse pulp A pulp board in the pulp is taken as a measurement standard, the oil-proofing agent is Solvera PT5045, the consumption of the oil-proofing agent is 2wt% of the bagasse pulp A pulp board, the waterproof agent is AKD, the consumption of the waterproof agent is 5wt% of the bagasse pulp A pulp board, the consumption of the sizing solution is taken as a measurement standard, the dry weight of octenyl succinic acid oxidized starch ester is taken as a measurement standard, the consumption of octenyl succinic acid oxidized starch ester is 4wt% of the bagasse pulp A pulp board in the use of the sizing solution, the retention aid is APAM, and the consumption of the retention aid is 0.04wt% of the bagasse pulp A pulp board.
Example 4:
a preparation method of degradable straw base paper,
preparation of nanocellulose-polyethylene glycol complex: adding polyethylene glycol into distilled water, stirring for dissolving, adding nanocellulose, performing ultrasonic dispersion, stirring at 30 ℃ for 2 hours, stirring at 90 ℃ for 2 hours, and finally performing vacuum drying to obtain the nanocellulose-polyethylene glycol compound. The polyethylene glycol is 15wt% of distilled water, and the nanocellulose is 40wt% of the polyethylene glycol.
Preparation of polylactic acid compound: adding polylactic acid into chloroform, stirring and dissolving at 30 ℃ to obtain polylactic acid solution; adding the nanocellulose-polyethylene glycol complex into chloroform, and homogenizing for 20min to obtain a complex homogeneous solution; adding the composite homogeneous solution into the polylactic acid solution, stirring and mixing, carrying out ultrasonic treatment in an ice-water bath for 20min to uniformly disperse and mix the solution, and drying to obtain the polylactic acid composite. The polylactic acid solution contains 8 weight percent of polylactic acid, the composite homogeneous solution contains 10 weight percent of nano cellulose-polyethylene glycol compound, and when the polylactic acid solution is mixed with the composite homogeneous solution, the polylactic acid in the polylactic acid solution and the nano cellulose-polyethylene glycol compound in the composite homogeneous solution are taken as the measurement standard, so that the dosage of the nano cellulose-polyethylene glycol compound is 20 weight percent of the polylactic acid in the mixing of the polylactic acid solution and the composite homogeneous solution.
Preparation of oxidized starch octenyl succinate: adding oxidized tapioca starch into distilled water, mixing to obtain starch emulsion, dropwise adding octenyl succinic acid solution under stirring at 40 ℃, adjusting pH to 8.5, reacting for 3h, adjusting pH to 6.5 after the reaction is completed, washing with distilled water, washing with 95% ethanol, drying, and pulverizing to obtain octenyl succinic acid oxidized starch ester. The starch emulsion contains 30 weight percent of oxidized tapioca starch, the octenyl succinic acid solution contains 30 weight percent of octenyl succinic acid, when the octenyl succinic acid solution is dripped into the starch emulsion, the octenyl succinic acid in the octenyl succinic acid solution and the oxidized tapioca starch in the starch emulsion are used as the measurement standard, so that the octenyl succinic acid solution is dripped into the starch emulsion, and the use amount of the octenyl succinic acid is 8 weight percent of the oxidized tapioca starch.
Preparing straw base paper: adding the bagasse pulp A pulp plate and the polylactic acid compound into distilled water for soaking, after the pulp plate is fully swelled, defibering by a dissociator, pulping by a PFI pulping machine to obtain pulp, defibering the pulped pulp in a fiber separator, adding an oil-proof agent, a waterproofing agent, a sizing agent and a retention aid, manufacturing a wet paper web by papermaking, squeezing by an oil press, drying at 120 ℃, and treating for 24 hours in a constant temperature and humidity chamber to obtain straw base paper. The use amount of the bagasse pulp A pulp board is 10wt% of distilled water, the use amount of the polylactic acid compound is 3wt% of the bagasse pulp A pulp board, the oil proofing agent is Solvera PT5045 based on the use amount of the bagasse pulp A pulp board in the pulp, the use amount of the oil proofing agent is 2wt% of the bagasse pulp A pulp board, the waterproofing agent is AKD, the use amount of the waterproofing agent is 5wt% of the bagasse pulp A pulp board, the use amount of the sizing solution is based on the dry weight of octenyl succinic acid oxidized starch ester as a measurement standard, the use amount of octenyl succinic acid oxidized starch ester is 4wt% of the bagasse pulp A pulp board in the use of the sizing solution, the retention aid is APAM, and the use amount of the retention aid is 0.04wt% of the bagasse pulp A pulp board.
Example 5:
the preparation of the degradable straw base paper is different from the preparation of the embodiment 1 in that hydroxypropyl starch ether is added in the preparation of the straw base paper.
Preparing straw base paper: adding a bagasse pulp A pulp board, a nanocellulose-polyethylene glycol compound, polylactic acid and hydroxypropyl starch ether into distilled water for soaking, after the pulp board is fully swelled, defibering by a dissociator, pulping by a PFI pulping machine to obtain pulp, defibering the pulp after the pulp is beaten in a fiber separator, adding an oil-proof agent, a waterproofing agent and a retention aid, making wet paper web by papermaking, pressing by an oil press, drying at 120 ℃, and treating for 24 hours in a constant temperature and humidity chamber to obtain straw base paper. The consumption of the bagasse pulp A pulp board is 10wt% of distilled water, the consumption of the nanocellulose-polyethylene glycol compound is 0.5wt% of the bagasse pulp A pulp board, the consumption of polylactic acid is 2.5wt% of the bagasse pulp A pulp board, the consumption of hydroxypropyl starch ether is 0.2-0.6wt% of the bagasse pulp A pulp board, the consumption of the bagasse pulp A pulp board in the pulp is based on the measurement, the oil-proofing agent is Solvera PT5045, the consumption of the oil-proofing agent is 2wt% of the bagasse pulp A pulp board, the waterproof agent is AKD, the consumption of the waterproof agent is 5wt% of the bagasse pulp A pulp board, the retention aid is APAM, and the consumption of the retention aid is 0.04wt% of the bagasse pulp A pulp board.
Example 6:
the preparation of the degradable straw base paper is different from the preparation of the embodiment 2 in that hydroxypropyl starch ether is added in the preparation of the straw base paper.
Preparing straw base paper: adding the bagasse pulp A pulp board, the polylactic acid compound and the hydroxypropyl starch ether into distilled water for soaking, after the pulp board is fully swelled, fluffing by a dissociator, then carrying out pulp grinding and pulping by a PFI pulp grinder to obtain pulp, fluffing the pulped pulp in a fiber separator, then adding an oil-proof agent, a water-proof agent and a retention aid, making into a wet paper web, squeezing by an oil press, drying at 120 ℃, and then treating for 24 hours in a constant temperature and humidity chamber to obtain straw base paper. The consumption of the bagasse pulp A pulp board is 10wt% of distilled water, the consumption of the polylactic acid compound is 3wt% of the bagasse pulp A pulp board, the consumption of the bagasse pulp A pulp board in the pulp is used as a measurement standard, the oil-proofing agent is Solvera PT5045, the consumption of the oil-proofing agent is 2wt% of the bagasse pulp A pulp board, the water-proofing agent is AKD, the consumption of the water-proofing agent is 5wt% of the bagasse pulp A pulp board, the retention aid is APAM, and the consumption of the retention aid is 0.04wt% of the bagasse pulp A pulp board.
Example 7:
the preparation of the degradable straw base paper is different from the preparation of the embodiment 3 in that hydroxypropyl starch ether is added in the preparation of the straw base paper.
Preparing straw base paper: adding bagasse pulp A pulp board and hydroxypropyl starch ether into distilled water for soaking, after the pulp board is fully swelled, defibering by a dissociator, pulping by a PFI pulping machine to obtain pulp, defibering the pulped pulp in a fiber separator, adding an oil-proof agent, a waterproofing agent, a sizing agent and a retention aid, manufacturing a wet paper web by papermaking, squeezing by an oil press, drying at 120 ℃, and treating for 24 hours in a constant temperature and humidity chamber to obtain straw base paper. The consumption of the bagasse pulp A pulp board is 10wt% of distilled water, the consumption of hydroxypropyl starch ether is 0.2-0.6wt% of the bagasse pulp A pulp board, the consumption of the bagasse pulp A pulp board in the pulp is 2wt% of the bagasse pulp A pulp board, the waterproof agent is AKD, the consumption of the waterproof agent is 5wt% of the bagasse pulp A pulp board, the consumption of the sizing solution is the dry amount of octenyl succinic acid oxidized starch ester serving as a measurement standard, the consumption of octenyl succinic acid oxidized starch ester is 4wt% of the bagasse pulp A pulp board in the use of the sizing solution, the retention aid is APAM, and the consumption of the retention aid is 0.04wt% of the bagasse pulp A pulp board.
Example 8:
the preparation of the degradable straw base paper is different from the preparation of the embodiment 4 in that hydroxypropyl starch ether is added in the preparation of the straw base paper.
Preparing straw base paper: adding the bagasse pulp A pulp plate, the polylactic acid compound and the hydroxypropyl starch ether into distilled water for soaking, after the pulp plate is fully swelled, fluffing by a dissociator, then carrying out pulp grinding and pulping by a PFI pulp grinder to obtain pulp, fluffing the pulped pulp in a fiber separator, then adding an oil-proof agent, a waterproofing agent, a sizing agent and a retention aid, pulping to obtain a wet paper web, squeezing by an oil press, drying at 120 ℃, and then treating for 24 hours in a constant temperature and humidity chamber to obtain straw base paper. The use amount of the bagasse pulp A pulp board is 10wt% of distilled water, the use amount of the polylactic acid compound is 3wt% of the bagasse pulp A pulp board, the use amount of the hydroxypropyl starch ether is 0.4wt% of the bagasse pulp A pulp board, the oil-proofing agent is Solvera PT5045 based on the use amount of the bagasse pulp A pulp board in the pulp, the use amount of the oil-proofing agent is 2wt% of the bagasse pulp A pulp board, the water-proofing agent is AKD, the use amount of the water-proofing agent is 5wt% of the bagasse pulp A pulp board, the use amount of the application liquid is based on the dry amount of octenyl succinic acid oxidized starch ester as a measurement standard, in the use of the application liquid, the use amount of the octenyl succinic acid oxidized starch ester is 4wt% of the bagasse pulp A pulp board, the retention aid is APAM, and the use amount of the retention aid is 0.04wt% of the bagasse pulp A pulp board.
Example 9:
the preparation of the degradable straw base paper is different from the preparation of the embodiment 4 in that konjak mannan is added in the preparation of the straw base paper.
Preparing straw base paper: adding the bagasse pulp A pulp plate and the polylactic acid compound into distilled water for soaking, after the pulp plate is fully swelled, defibering by a dissociator, pulping by a PFI pulping machine to obtain pulp, defibering the pulped pulp in a fiber separator, adding an oil-proof agent, a waterproofing agent, a sizing agent, konjak mannan and a retention aid, pulping to prepare a wet paper web, pressing by an oil press, drying at 120 ℃, and treating for 24 hours in a constant temperature and humidity chamber to obtain straw base paper. The use amount of the bagasse pulp A pulp board is 10wt% of distilled water, the use amount of the polylactic acid compound is 3wt% of the bagasse pulp A pulp board, the use amount of the oil proofing agent is Solvera PT5045 based on the measurement of the amount of the bagasse pulp A pulp board in the pulp, the use amount of the oil proofing agent is 2wt% of the bagasse pulp A pulp board, the water proofing agent is AKD, the use amount of the water proofing agent is 5wt% of the bagasse pulp A pulp board, the use amount of the sizing solution is based on the dry weight of octenyl succinic acid oxidized starch ester as a measurement standard, the use amount of octenyl succinic acid oxidized starch ester is 4wt% of the bagasse pulp A pulp board, the use amount of konjak mannan is 0.6wt% of the bagasse pulp A pulp board, the use amount of the retention aid is APAM, and the use amount of the retention aid is 0.04wt% of the bagasse pulp A pulp board.
Example 10:
the preparation of the degradable straw base paper is different from the preparation of the embodiment 8 in that konjak mannan is added in the preparation of the straw base paper.
Preparing straw base paper: adding the bagasse pulp A pulp board, the polylactic acid compound and the hydroxypropyl starch ether into distilled water for soaking, after the pulp board is fully swelled, fluffing by a dissociator, then carrying out pulp grinding and pulping by a PFI pulp grinder to obtain pulp, fluffing the pulped pulp in a fiber separator, then adding an oil-proof agent, a waterproofing agent, a sizing agent, konjak mannan and a retention aid, pulping to prepare a wet paper web, squeezing by an oil press, drying at 120 ℃, and then treating for 24 hours in a constant temperature and humidity chamber to obtain straw base paper. The use amount of the bagasse pulp A pulp board is 10wt% of distilled water, the use amount of the polylactic acid compound is 3wt% of the bagasse pulp A pulp board, the use amount of the hydroxypropyl starch ether is 0.4wt% of the bagasse pulp A pulp board, the use amount of the oil-proofing agent is Solvera PT5045 based on the use amount of the bagasse pulp A pulp board in the pulp, the use amount of the oil-proofing agent is 2wt% of the bagasse pulp A pulp board, the water-proofing agent is AKD, the use amount of the water-proofing agent is 5wt% of the bagasse pulp A pulp board, the use amount of the application liquid is the dry amount of octenyl succinic acid oxidized starch ester serving as a measurement standard, in the use of the application liquid, the use amount of the octenyl succinic acid oxidized starch ester is 4wt% of the bagasse pulp A pulp board, the use amount of konjak mannans is 0.6wt% of the bagasse pulp A pulp board, the retention agent is APAM, and the use amount of the retention agent is 0.04wt% of the bagasse pulp A pulp board.
Test example:
1. characterization of topography
Test sample: the degradable straw paper prepared in example 4.
As shown in figure 1, the degradable straw paper prepared by the invention can be found that the surface fibers of the base paper are interwoven, the surface is compact, and the surface pores are covered, so that the penetration of liquid can be effectively inhibited.
2. Tensile Strength test
Test sample: the degradable straw paper prepared in each example.
The tensile strength of the samples was tested according to the standard of GB/T12914-2018.
The tensile strength of the degradable straw raw paper prepared by the invention is shown as figure 2, wherein S1 is the example 1, S2 is the example 2, S3 is the example 3, S4 is the example 4, S5 is the example 5, S6 is the example 6, S7 is the example 7, S8 is the example 8, S9 is the example 9, and S10 is the example 10, the bagasse pulp A pulp sheet is added into distilled water to prepare pulp, and then the degradable straw raw paper is prepared under the action of various functional agents, the tensile strength of the degradable straw raw paper prepared by the invention is more than 1.8KN/m, a waterproof agent and an oil-proof agent are added into the degradable straw raw paper to provide certain waterproof performance and oil-proof performance for the straw, besides, when the degradable straw raw paper is prepared, nanocellulose, polyethylene glycol and polylactic acid can be added, and when the degradable straw raw paper is used, the invention discovers that the nanocellulose and polyethylene glycol can be prepared into a nanocellulose-polyethylene glycol complex, and then the nanocellulose-polylactic acid complex can be applied to the cellulose-polylactic acid complex, and the polylactic acid complex can be used for preparing the cellulose and polylactic acid complex and the polylactic acid complex and has better effect than the polylactic acid complex and the tensile strength of the cellulose and polylactic acid complex and the polylactic acid complex can be prepared into the degradable straw and the degradable straw; when the degradable straw base paper is prepared, sizing liquid prepared from octenyl succinic acid oxidized starch ester and agar can be added, wherein the use of the octenyl succinic acid oxidized starch ester and the agar is weaker than that of a nanocellulose-polyethylene glycol compound and polylactic acid compound, and the use of the octenyl succinic acid oxidized starch ester, the agar and the polylactic acid compound are used together, so that the tensile strength of the degradable straw base paper is improved; when the nanocellulose-polyethylene glycol compound and polylactic acid are used, hydroxypropyl starch ether is added to prepare degradable straw base paper, the tensile strength of the obtained degradable straw base paper is improved, and when the polylactic acid compound or sizing liquid containing octenyl succinic acid oxidized starch ester and agar is used, the tensile strength of the degradable straw base paper can be improved, and when the hydroxypropyl starch ether, the polylactic acid compound and sizing liquid containing octenyl succinic acid oxidized starch ester and agar are used together, the tensile strength of the obtained degradable straw base paper is improved; when the polylactic acid compound, the sizing liquid containing octenyl succinic acid oxidized starch ester and the agar are used together, konjak mannan can be added, so that the tensile strength of the degradable straw base paper is improved, and furthermore, the hydroxypropyl starch ether, konjak mannan and the polylactic acid compound, the sizing liquid containing octenyl succinic acid oxidized starch ester and the agar are used together, so that the best effect is achieved.
3. Tear test
Test sample: the degradable straw paper prepared in each example.
The samples were tested for tear strength according to GB/T455-2002 standard.
The tearing degree of the degradable straw base paper prepared by the invention is shown as figure 3, wherein S1 is example 1, S2 is example 2, S3 is example 3, S4 is example 4, S5 is example 5, S6 is example 6, S7 is example 7, S8 is example 8, S9 is example 9, and S10 is example 10. The bagasse pulp A pulp board is added into distilled water to prepare pulp, and then the degradable straw base paper is prepared under the action of various functional agents, the tearing degree of the degradable straw base paper prepared by the invention is more than 400mN, a waterproof agent and an oil-proof agent are added into the degradable straw base paper prepared by the invention to provide certain waterproof performance and oil-proof performance for the straw, besides, when the degradable straw base paper is prepared, nanocellulose, polyethylene glycol and polylactic acid can be added, and when the degradable straw base paper is used, the application shows that the nanocellulose and polyethylene glycol can be prepared into a nanocellulose-polyethylene glycol complex, and then the nanocellulose-polylactic acid complex can be applied to the polylactic acid complex, and the composite polylactic acid complex can be prepared into the polylactic acid complex, and the composite polylactic acid has better tearing effect than the polylactic acid complex, and the composite effect is shown that the composite polylactic acid and the composite polylactic acid is prepared into the degradable straw base paper; when the degradable straw base paper is prepared, sizing liquid prepared from octenyl succinic acid oxidized starch ester and agar can be added, wherein the use of the octenyl succinic acid oxidized starch ester and the agar is weaker than that of a nanocellulose-polyethylene glycol compound and polylactic acid compound, and the use of the octenyl succinic acid oxidized starch ester, the agar and the polylactic acid compound are used together, so that the tearing degree of the degradable straw base paper is improved; when the nanocellulose-polyethylene glycol compound and polylactic acid are used, hydroxypropyl starch ether is added to prepare degradable straw base paper, the tearing degree of the obtained degradable straw base paper is improved, and when the polylactic acid compound or the sizing liquid containing octenyl succinic acid oxidized starch ester and agar is used, the tearing degree of the degradable straw base paper can be improved, and when the hydroxypropyl starch ether, the polylactic acid compound or the sizing liquid containing octenyl succinic acid oxidized starch ester and agar are used together, the tearing degree of the obtained degradable straw base paper is improved; when the polylactic acid compound, the sizing liquid containing octenyl succinic acid oxidized starch ester and the agar are used together, konjak mannan can be added, so that the tearing degree of the degradable straw base paper is improved, and furthermore, the hydroxypropyl starch ether, konjak mannan and the polylactic acid compound, the sizing liquid containing octenyl succinic acid oxidized starch ester and the agar are used together, so that the best effect is achieved.
4. Degradation test
Test sample: the degradable straw paper prepared in each example.
The samples were treated in a vacuum oven at 60 ℃ for 24 hours, weighed, then added to PBS buffer at pH 7.4, sealed, then placed in an incubator at 37 ℃, replaced with buffer every 3d, degraded for 60d, removed, dried, and weighed.
Degradation loss rate= (mass before degradation-mass after degradation)/mass before degradation×100%.
The degradation loss rate of the degradable straw base paper prepared by the invention is shown in figure 4, wherein S1 is shown in the embodiment 1, S2 is shown in the embodiment 2, S3 is shown in the embodiment 3, S4 is shown in the embodiment 4, S5 is shown in the embodiment 5, S6 is shown in the embodiment 6, S7 is shown in the embodiment 7, S8 is shown in the embodiment 8, S9 is shown in the embodiment 9, and S10 is shown in the embodiment 10, the bagasse pulp A pulp plate is added into distilled water to prepare pulp, and then the degradable straw base paper is prepared under the action of various functional agents, the degradation loss rate of the degradable straw base paper prepared by the invention is more than 6.5%, a waterproof agent and an oil-proof agent are added into the degradable straw base paper prepared by the invention, and a certain waterproof property and an oil-proof property are provided for the straw, besides, when the degradable base paper is prepared, nanocellulose, polyethylene glycol and polylactic acid can be added, and when the application shows that the nanocellulose and polyethylene glycol can be prepared into a nanocellulose-polyethylene glycol complex, and polyethylene glycol-polyethylene glycol complex, and the composite polylactic acid can be applied to the composite polylactic acid and the composite can be prepared into the composite polylactic acid and the composite effect of the composite degradable straw base paper, and the composite polylactic acid and the composite effect of the composite polylactic acid and the composite effect can be better than the composite effect can be found; when the degradable straw base paper is prepared, sizing liquid prepared from octenyl succinic acid oxidized starch ester and agar can be added, wherein the use of the octenyl succinic acid oxidized starch ester and the agar is weaker than that of a nanocellulose-polyethylene glycol compound and polylactic acid compound, and the use of the octenyl succinic acid oxidized starch ester, the agar and the polylactic acid compound are used together, so that the degradation performance of the degradable straw base paper is improved; when the nanocellulose-polyethylene glycol compound and polylactic acid are used, hydroxypropyl starch ether is added to prepare degradable straw base paper, the degradation performance of the obtained degradable straw base paper is improved, and when the polylactic acid compound or sizing liquid containing octenyl succinic acid oxidized starch ester and agar is used, the degradation performance of the degradable straw base paper can be improved, and when the hydroxypropyl starch ether, the polylactic acid compound and sizing liquid containing octenyl succinic acid oxidized starch ester and agar are used together, the degradation performance of the obtained degradable straw base paper is improved; when the polylactic acid compound, the sizing liquid containing octenyl succinic acid oxidized starch ester and the agar are used together, konjak mannan can be added, so that the degradation performance of the degradable straw base paper is improved, and furthermore, the hydroxypropyl starch ether, konjak mannan and the polylactic acid compound, the sizing liquid containing octenyl succinic acid oxidized starch ester and the agar are used together, so that the best effect is achieved.
The above embodiments are merely for illustrating the present invention and not for limiting the same, and various changes and modifications may be made by one of ordinary skill in the art without departing from the spirit and scope of the invention. Therefore, all equivalent technical solutions are also within the scope of the present invention, which is defined by the claims.
Claims (10)
1. A degradable base paper comprising: the base paper is prepared from bagasse pulp as a main material, wherein the base paper contains a functional agent, and the functional agent comprises a nanocellulose-polyethylene glycol compound or a polylactic acid compound or a sizing liquid; the nano cellulose-polyethylene glycol compound is formed by preparing nano cellulose and polyethylene glycol in a solution, the polylactic acid compound is formed by preparing the nano cellulose-polyethylene glycol compound and polylactic acid in a solvent, and the sizing solution contains octenyl succinic acid oxidized starch ester and agar.
2. A degradable base paper according to claim 1, characterized in that: the functional agent comprises a waterproof agent, an oil-proof agent and a retention aid.
3. A degradable base paper according to claim 1, characterized in that: the functional agent at least comprises a polylactic acid compound and a sizing liquid.
4. A degradable base paper according to claim 1, characterized in that: the functional agent comprises hydroxypropyl starch ether.
5. A process for the preparation of a degradable base paper according to any one of claims 1 to 4 comprising:
swelling bagasse pulp in distilled water, fluffing, pulping to prepare pulp, and adding a functional agent in the process of preparing the pulp; the functional agent comprises a nanocellulose-polyethylene glycol compound or a polylactic acid compound or a sizing liquid; the nano cellulose-polyethylene glycol compound is prepared from nano cellulose and polyethylene glycol in a solution, the polylactic acid compound is prepared from the nano cellulose-polyethylene glycol compound and polylactic acid in a solvent, and the sizing solution contains octenyl succinic acid oxidized starch ester and agar;
and (3) making the prepared sizing agent into degradable base paper by papermaking and oil pressure.
6. The method for preparing the degradable base paper according to claim 5, wherein the method comprises the following steps: the usage amount of the nanocellulose-polyethylene glycol compound is 0.42-0.83wt% of the bagasse pulp A pulp board, and the usage amount of the polylactic acid is 2.08-4.17wt% of the bagasse pulp A pulp board.
7. The method for preparing the degradable base paper according to claim 5, wherein the method comprises the following steps: the usage amount of the polylactic acid compound is 2.5-5wt% of the bagasse pulp A pulp board.
8. The method for preparing the degradable base paper according to claim 5, wherein the method comprises the following steps: the functional agent comprises a waterproof agent, an oil-proof agent and a retention aid, wherein the use amount of the oil-proof agent is 1-3wt% of the bagasse pulp A pulp board, the use amount of the waterproof agent is 3-7wt% of the bagasse pulp A pulp board, and the use amount of the retention aid is 0.02-0.08wt% of the bagasse pulp A pulp board.
9. The method for preparing the degradable base paper according to claim 5, wherein the method comprises the following steps: the use amount of the octenyl succinic acid oxidized starch ester in the sizing solution is 100-900wt% of that of the agar.
10. Use of a degradable base paper according to any of claims 1-4 for the preparation of food packaging paper and/or straw.
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| EP0014520A1 (en) * | 1979-02-05 | 1980-08-20 | A.E. Staley Manufacturing Company | Method of sizing paper |
| CN106633160A (en) * | 2016-10-12 | 2017-05-10 | 南京林业大学 | Preparation method of glass paper/polylactic acid/nanocellulose composite membrane |
| CN109811593A (en) * | 2019-01-30 | 2019-05-28 | 镇江大东纸业有限公司 | Glycol environment protecting paper and its production method |
| CN110157170A (en) * | 2019-06-05 | 2019-08-23 | 东华大学 | A kind of polylactic acid/nano cellulose/hydroxyapatite composite material and its preparation |
| CN115012252A (en) * | 2022-06-07 | 2022-09-06 | 安徽顺彤包装材料有限公司 | Degradable highlight oil-proof paper and preparation method thereof |
| CN115075058A (en) * | 2022-06-10 | 2022-09-20 | 安徽顺彤包装材料有限公司 | Degradable oil-proof barrier paper and preparation process thereof |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0014520A1 (en) * | 1979-02-05 | 1980-08-20 | A.E. Staley Manufacturing Company | Method of sizing paper |
| CN106633160A (en) * | 2016-10-12 | 2017-05-10 | 南京林业大学 | Preparation method of glass paper/polylactic acid/nanocellulose composite membrane |
| CN109811593A (en) * | 2019-01-30 | 2019-05-28 | 镇江大东纸业有限公司 | Glycol environment protecting paper and its production method |
| CN110157170A (en) * | 2019-06-05 | 2019-08-23 | 东华大学 | A kind of polylactic acid/nano cellulose/hydroxyapatite composite material and its preparation |
| CN115012252A (en) * | 2022-06-07 | 2022-09-06 | 安徽顺彤包装材料有限公司 | Degradable highlight oil-proof paper and preparation method thereof |
| CN115075058A (en) * | 2022-06-10 | 2022-09-20 | 安徽顺彤包装材料有限公司 | Degradable oil-proof barrier paper and preparation process thereof |
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