CN115058894A - Hydrolysis-resistant textile auxiliary for drying net - Google Patents
Hydrolysis-resistant textile auxiliary for drying net Download PDFInfo
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- CN115058894A CN115058894A CN202210988642.1A CN202210988642A CN115058894A CN 115058894 A CN115058894 A CN 115058894A CN 202210988642 A CN202210988642 A CN 202210988642A CN 115058894 A CN115058894 A CN 115058894A
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/26—Emulsion polymerisation with the aid of emulsifying agents anionic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/30—Emulsion polymerisation with the aid of emulsifying agents non-ionic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/07—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with halogens; with halogen acids or salts thereof; with oxides or oxyacids of halogens or salts thereof
- D06M11/11—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with halogens; with halogen acids or salts thereof; with oxides or oxyacids of halogens or salts thereof with halogen acids or salts thereof
- D06M11/13—Ammonium halides or halides of elements of Groups 1 or 11 of the Periodic System
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/58—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides
- D06M11/64—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides with nitrogen oxides; with oxyacids of nitrogen or their salts
- D06M11/65—Salts of oxyacids of nitrogen
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
- D06M13/35—Heterocyclic compounds
- D06M13/355—Heterocyclic compounds having six-membered heterocyclic rings
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
- D06M2200/10—Repellency against liquids
- D06M2200/12—Hydrophobic properties
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The application relates to a textile auxiliary for a hydrolysis-resistant drying net, which relates to the technical field of textile auxiliary and comprises the following components in parts by mass: 50-60 parts of composite emulsion and 1-2 parts of antioxidant; the composite emulsion comprises, by mass, 0.25-0.45 part of modified hydrophobic zinc nitrate, 0.25-0.5 part of an initiator, and the balance of a polymerization emulsion, wherein the polymerization emulsion comprises the following components: 20-26 parts of methyl methacrylate, 30-35 parts of butyl acrylate, 1.08-1.18 parts of composite emulsifier, 40-60 parts of deionized water and 0.25-0.27 part of sodium bicarbonate. This application is attached to textile auxiliary on the surface of drying screen for the surface of drying screen forms the anti hydrolysis layer of one deck, and the contact angle on anti hydrolysis layer is big, can make the drying screen have anti hydrolysis performance, and then prolongs the life of drying screen.
Description
Technical Field
The application relates to the field of textile auxiliary agents, in particular to a textile auxiliary agent for a hydrolysis-resistant drying net.
Background
The drying net is mostly woven by polyester monofilaments, and in the process of a papermaking production process, paper needs to be flatly laid at the drying net for drying after being prepared, so that dry paper is obtained.
With the rapid development of the papermaking industry, the use requirement of paper is gradually improved, however, after the drying net is contacted with wet paper for a long time, due to the poor moisture and heat resistance of the polyester material, hydrolysis, aging and cracking are easy to occur, frequent replacement is needed, and the cost of papermaking production is improved, so that a textile auxiliary for the hydrolysis-resistant drying net needs to be developed, and the hydrolysis resistance of the drying net is improved.
Disclosure of Invention
In order to improve the hydrolysis resistance of the drying net, the application provides a textile auxiliary for the hydrolysis-resistant drying net.
The application provides a textile auxiliary for hydrolytic resistance dryer wire adopts following technical scheme:
a textile auxiliary for a hydrolysis-resistant drying net comprises the following components in parts by weight:
50-60 parts of composite emulsion and 1-2 parts of antioxidant;
the composite emulsion comprises, by mass, 0.25-0.45 part of modified hydrophobic zinc nitrate, 0.25-0.5 part of an initiator, and the balance of a polymerization emulsion, wherein the polymerization emulsion comprises the following components:
20-26 parts of methyl methacrylate, 30-35 parts of butyl acrylate, 1.08-1.18 parts of composite emulsifier, 40-60 parts of deionized water and 0.25-0.27 part of sodium bicarbonate.
The textile auxiliary is attached to the surface of the drying net, the textile auxiliary forms an anti-hydrolysis layer on the surface of the drying net, and the contact angle of the anti-hydrolysis layer is large, so that the anti-hydrolysis layer shows hydrophobicity, the contact effect of a water body and the drying net is weakened, the drying net has good anti-hydrolysis performance, the phenomenon that the drying net is damaged after being used for a long time is reduced, and the service life of the drying net is prolonged;
methyl methacrylate and butyl acrylate are used as emulsion raw materials, the emulsion raw materials have good flexibility and good weather resistance, the good performance can be kept in a humid environment, modified hydrophobic zinc nitrate has hydrophobic performance, the modified hydrophobic zinc nitrate is grafted to the methyl methacrylate and the butyl acrylate, the hydrophobic performance and the stability of the composite emulsion can be improved, the hydrolysis resistance of a drying net is improved, meanwhile, the surface of modified hydrophobic zinc nitrate particles has a large surface area, the interface interaction with the emulsion is improved, the adhesion performance of the modified hydrophobic zinc nitrate particles in the emulsion is improved, the connection effect of the composite emulsion is enhanced, the mechanical performance of a hydrolysis layer is improved, and the mechanical performance of the drying water-resistant net is further improved.
Preferably, the modified hydrophobic zinc nitrate raw material comprises zinc nitrate hexahydrate, hexamethylenetetramine and hydrofluoric acid.
Modified hydrophobic zinc nitrate uses zinc nitrate hexahydrate to provide a zinc source, hexamethylenetetramine provides an alkali source, hydrofluoric acid is used as a structure inducer, modified hydrophobic zinc nitrate ion particles are prepared through synthesis, the surface energy modification is carried out on the zinc nitrate to obtain a super-hydrophobic surface, and after the super-hydrophobic surface is combined with the composite emulsion, a super-hydrophobic coating is obtained, so that the hydrophobic performance is improved, after a textile auxiliary is attached to the surface of a drying net, the hydrolysis resistance of the drying net can be improved, meanwhile, the coating has excellent mechanical properties, the mechanical strength of the drying net is further improved, and the service life of the drying net is prolonged.
Preferably, the mass ratio of the zinc nitrate hexahydrate to the hexamethylenetetramine to the hydrofluoric acid is (1.8-2.3):1 (0.05-0.07).
By controlling the mass ratio of zinc nitrate hexahydrate, hexamethylenetetramine and hydrofluoric acid within the above range, a modified hydrophobic zinc nitrate having a better performance can be obtained.
Preferably, the modified hydrophobic zinc nitrate is prepared by the following method:
dissolving zinc nitrate hexahydrate to obtain a zinc nitrate hexahydrate aqueous solution, dissolving hexamethylenetetramine to obtain a hexamethylenetetramine aqueous solution, mixing the zinc nitrate hexahydrate aqueous solution and the hexamethylenetetramine aqueous solution, adding hydrofluoric acid, fully mixing to obtain a mixed solution, heating to 85-95 ℃ for reaction, cooling to room temperature, performing suction filtration, washing, and drying at 80 ℃ to obtain the modified hydrophobic zinc nitrate.
Preferably, the mass ratio of the polymerized emulsion to the modified hydrophobic zinc nitrate is as follows: 1:(0.006-0.008).
The composite emulsion with more excellent performance can be obtained by controlling the mass ratio of the modified hydrophobic zinc nitrate to the polymerized emulsion within the range.
Preferably, the composite emulsion is prepared by the following method:
mixing deionized water, a composite emulsifier and sodium bicarbonate, adding methyl methacrylate and butyl acrylate, stirring and mixing at room temperature to obtain a uniform pre-emulsion, then adding modified hydrophobic zinc nitrate, stirring uniformly, heating to 80 ℃, then adding an initiator for reaction, cooling to room temperature after reaction, and adjusting the pH value to 8-9 to obtain the composite emulsion.
Preferably, the initiator is dibenzoyl peroxide.
Preferably, the reaction temperature in the reaction of adding the initiator is 75-85 ℃ and the reaction time is 1-2 h.
Controlling the reaction temperature and reaction time when the initiator is added within the above ranges makes the reaction more stable.
Preferably, the compound emulsifier comprises a mixture of octylphenol polyoxyethylene ether and sodium dodecyl sulfate.
The compound emulsifier is prepared by compounding octyl phenol polyoxyethylene ether and lauryl sodium sulfate, and the integral surface activity of the emulsifier can be improved, so that more stable compound emulsion is obtained.
Preferably, the antioxidant is tert-butyl-4-hydroxyanisole.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the textile auxiliary agent takes methyl methacrylate and butyl acrylate as a matrix, and has good mechanical property and weather resistance; the modified hydrophobic zinc nitrate has extremely low surface energy, can obviously improve the super-hydrophobicity of the composite emulsion after being combined with methyl methacrylate and butyl acrylate, and the textile auxiliary forms an anti-hydrolysis layer on the surface of the drying net, so that a hydrophobic film is formed on the surface of the drying net, the contact between a water body and the surface of the drying net is reduced, and the mechanical strength of the drying net is improved;
2. the modified hydrophobic zinc nitrate provides a zinc source through zinc nitrate hexahydrate, the hexamethylenetetramine provides an alkali source, hydrofluoric acid is used as a structure inducer to synthesize and prepare modified hydrophobic zinc nitrate particles, and after the modified hydrophobic zinc nitrate particles are combined with the composite emulsion, a super-hydrophobic layer can be obtained;
3. the polyoxyethylene zinc-based phenol ether and the sodium dodecyl sulfate are compounded to serve as the composite emulsifier, so that the surface activity of the composite emulsifier can be improved, the composite emulsion is more uniform, and the more stable composite emulsion is obtained.
Detailed Description
The examples of the present application disclose a textile auxiliary for hydrolysis-resistant dryer webs, which are further detailed in the following text with reference to the examples.
Example 1
Preparing modified hydrophobic zinc nitrate:
6.272kg of zinc nitrate hexahydrate is weighed and added into 200L of deionized water, and a magnetic stirrer is used for fully dissolving the zinc nitrate hexahydrate to obtain a zinc nitrate hexahydrate aqueous solution; 3.484kg of hexamethylenetetramine is weighed and added into 200L of deionized water, the hexamethylenetetramine aqueous solution is fully dissolved by using a magnetic stirrer to obtain a hexamethylenetetramine aqueous solution, the zinc nitrate hexahydrate aqueous solution and the hexamethylenetetramine aqueous solution are mixed, 0.244kg of hydrofluoric acid is added, the mixture is magnetically stirred for 5min to be fully mixed to obtain a mixed solution, the mixed solution is reacted for 2h at the temperature of 85 ℃, the mixed solution is cooled to room temperature, is washed by using the deionized water after suction filtration, and is dried by using a dryer at the temperature of 80 ℃, so that the modified hydrophobic zinc nitrate can be obtained.
Preparing a composite emulsion:
weighing 0.72kg of sodium dodecyl sulfate and 0.36kg of octylphenol polyoxyethylene ether, mixing to obtain a composite emulsifier, mixing 40L of deionized water, the composite emulsifier and 0.25kg of sodium bicarbonate, adding 20kg of methyl methacrylate and 30kg of butyl acrylate, stirring and mixing at room temperature to obtain uniform polymerized emulsion, weighing 50kg of polymerized emulsion, then adding 0.3kg of modified hydrophobic zinc nitrate, heating to 80 ℃ after stirring uniformly, then adding 0.05kg of initiator for reaction, reacting at 75 ℃ for 2h, cooling to room temperature after reaction, and adjusting the pH value to 8 by using ammonia water to obtain the composite emulsion; wherein the initiator is dibenzoyl peroxide, and the CAS number of the octylphenol polyoxyethylene ether is 26636-32-8.
Preparing a textile auxiliary agent:
weighing 50kg of the prepared composite emulsion, adding 1kg of antioxidant, and fully stirring to obtain the textile auxiliary; wherein the antioxidant is tert-butyl-4-hydroxyanisole.
And (3) treating the drying net:
and completely soaking the drying net into the prepared textile auxiliary, standing for 8 hours at room temperature to enable the textile auxiliary to be fully contacted with the drying net, and drying the drying net soaked with the textile auxiliary for 2 hours at the temperature of 45 ℃ to enable the textile auxiliary to form a water-resistant layer on the surface of the drying net, thus obtaining the treated drying net.
Example 2
Preparing modified hydrophobic zinc nitrate:
9.612kg of zinc nitrate hexahydrate is weighed and added into 200L of deionized water, and a magnetic stirrer is used for fully dissolving the zinc nitrate hexahydrate to obtain a zinc nitrate hexahydrate aqueous solution; 4.179kg of hexamethylenetetramine is weighed and added into 200L of deionized water, the hexamethylenetetramine aqueous solution is fully dissolved by using a magnetic stirrer to obtain a hexamethylenetetramine aqueous solution, the zinc nitrate hexahydrate aqueous solution and the hexamethylenetetramine aqueous solution are mixed, 0.209kg of hydrofluoric acid is added, the mixture is magnetically stirred for 5min to be fully mixed to obtain a mixed solution, the mixed solution is reacted for 2h at the temperature of 85 ℃, the mixed solution is cooled to the room temperature, is washed by using the deionized water after being filtered, and is dried by using a dryer at the temperature of 80 ℃, so that the modified hydrophobic zinc nitrate can be obtained.
Preparing a composite emulsion:
weighing 0.88kg of sodium dodecyl sulfate and 0.4kg of octylphenol polyoxyethylene ether, mixing to obtain a composite emulsifier, mixing 40L of deionized water, the composite emulsifier and 0.27kg of sodium bicarbonate, adding 26kg of methyl methacrylate and 35kg of butyl acrylate, stirring and mixing at room temperature to obtain uniform polymerized emulsion, weighing 50kg of polymerized emulsion, then adding 0.4kg of modified hydrophobic zinc nitrate, heating to 80 ℃ after stirring uniformly, then adding 0.07kg of initiator for reaction, reacting for 2 hours at 75 ℃, cooling to room temperature after reaction, and adjusting the pH value to 8 by using ammonia water to obtain the composite emulsion; wherein the initiator is dibenzoyl peroxide, and the CAS number of the octylphenol polyoxyethylene ether is 26636-32-8.
Preparing a textile auxiliary agent:
weighing 60kg of the prepared composite emulsion, adding 2kg of antioxidant, and fully stirring to obtain the textile auxiliary; wherein the antioxidant is tert-butyl-4-hydroxyanisole.
Treating the drying net:
and completely soaking the drying net into the prepared textile auxiliary, standing for 8 hours at room temperature to enable the textile auxiliary to be fully contacted with the drying net, and drying the drying net soaked with the textile auxiliary for 2 hours at the temperature of 45 ℃ to enable the textile auxiliary to form a water-resistant layer on the surface of the drying net, thus obtaining the treated drying net.
Example 3
Preparing modified hydrophobic zinc nitrate:
weighing 7.975kg of zinc nitrate hexahydrate, adding the zinc nitrate hexahydrate into 200L of deionized water, and fully dissolving the zinc nitrate hexahydrate by magnetic stirring to obtain a zinc nitrate hexahydrate aqueous solution; 3.797kg of hexamethylenetetramine is weighed and added into 200L of deionized water, the hexamethylenetetramine aqueous solution is fully dissolved by using a magnetic stirrer to obtain a hexamethylenetetramine aqueous solution, the zinc nitrate hexahydrate aqueous solution and the hexamethylenetetramine aqueous solution are mixed, 0.23kg of hydrofluoric acid is added, the mixture is magnetically stirred for 5min to be fully mixed to obtain a mixed solution, the mixed solution is reacted for 2h at the temperature of 90 ℃, the mixed solution is cooled to the room temperature, is washed by using the deionized water after being filtered, and is dried by using a dryer at the temperature of 80 ℃, so that the modified hydrophobic zinc nitrate can be obtained.
Preparing a composite emulsion:
weighing 0.8kg of sodium dodecyl sulfate and 0.38kg of octylphenol polyoxyethylene ether, mixing to obtain a composite emulsifier, mixing 50L of deionized water, the composite emulsifier and 0.26kg of sodium bicarbonate, adding 23kg of methyl methacrylate and 32kg of butyl acrylate, stirring and mixing at room temperature to obtain uniform polymerized emulsion, weighing 50kg of polymerized emulsion, then adding 0.35kg of modified hydrophobic zinc nitrate, heating to 80 ℃ after stirring uniformly, then adding 0.06g of initiator for reaction, reacting at 80 ℃ for 1.5h, cooling to room temperature after reaction, and adjusting the pH value to 8.5 by using ammonia water to obtain the composite emulsion; wherein the initiator is dibenzoyl peroxide, and the CAS number of the octylphenol polyoxyethylene ether is 26636-32-8.
Preparing a textile auxiliary agent:
weighing 55kg of the prepared composite emulsion, adding 1.5kg of antioxidant, and fully stirring to obtain the textile auxiliary; wherein the antioxidant is tert-butyl-4-hydroxyanisole.
Treating the drying net:
and completely soaking the drying net into the prepared textile auxiliary, standing for 8 hours at room temperature to enable the textile auxiliary to be fully contacted with the drying net, and drying the drying net soaked with the textile auxiliary for 2 hours at the temperature of 45 ℃ to enable the textile auxiliary to form a water-resistant layer on the surface of the drying net, thus obtaining the treated drying net.
Example 4
Example 4 is based on example 3, and example 4 differs from example 3 only in that: in the preparation of modified hydrophobic zinc nitrate in example 4, 6.61kg of zinc nitrate hexahydrate, 5.085kg of hexamethylenetetramine and 0.305kg of hydrofluoric acid were weighed.
Example 5
Example 5 is based on example 3, and example 5 differs from example 3 only in that: in the preparation of modified hydrophobic zinc nitrate in example 5, 8.705kg of zinc nitrate hexahydrate, 3.109kg of hexamethylenetetramine and 0.186kg of hydrofluoric acid were weighed.
Example 6
Example 6 is based on example 3, and example 6 differs from example 3 only in that: in the preparation of modified hydrophobic zinc nitrate in example 6, 8.338kg of zinc nitrate hexahydrate, 3.625kg of hexamethylenetetramine and 0.037kg of hydrofluoric acid were weighed.
Example 7
Example 7 is based on example 3, and example 6 differs from example 3 only in that: in the preparation of modified hydrophobic zinc nitrate in example 7, 8.094kg of zinc nitrate hexahydrate, 3.625kg of hexamethylenetetramine and 0.037kg of hydrofluoric acid were weighed.
Example 8
Example 8 is based on example 3, and example 8 differs from example 3 only in that: in the preparation of the composite emulsion in example 8, 0.5kg of modified hydrophobic zinc nitrate was weighed and 49.85kg of polymerized emulsion was weighed.
Example 9
Example 9 is based on example 3, and example 9 differs from example 3 only in that: in the preparation of the composite emulsion in example 9, 0.2kg of modified hydrophobic zinc nitrate was weighed and 50.15kg of polymerized emulsion was weighed.
Comparative example 1
Comparative example 1 is based on example 3, and comparative example 1 differs from example 3 only in that: the amount of initiator added was 0.15kg
Comparative example 2
Comparative example 2 is based on example 3, and comparative example 2 differs from example 3 only in that: in the preparation of the composite emulsion in comparative example 2, the modified hydrophobic zinc nitrate was replaced with ordinary zinc nitrate.
Comparative example 3
Comparative example 3 is based on example 3, which comparative example 3 differs from example 3 in that: when the composite emulsifier is prepared, 1.18kg of sodium dodecyl sulfate is weighed, and 0kg of octyl phenol polyoxyethylene ether is weighed.
Comparative example 4
Comparative example 4 is based on example 4, and comparative example 3 differs from example 3 in that: when the composite emulsifier is prepared, 0kg of lauryl sodium sulfate is weighed, and 1.18kg of octyl phenol polyoxyethylene ether is weighed.
Performance test
Performance test of hydrolytic resistance and mechanical strength of drying net
The dried webs of examples 1-9, comparative examples 1-4 were sampled and tested for the following properties:
(1) hydrolysis resistance test
Each sample is made into a test piece of 100mm multiplied by 100mm, each sample is made into three test pieces, the test pieces are kept for 28 days under the constant temperature condition of 85 ℃ and 90RH, the weight loss rate is calculated, and the lower the weight loss rate is, the better the hydrolytic resistance is; averaging the detection results, and filling the results into table 1;
(2) mechanical Strength test
Each sample was prepared into a 120mm × 120mm sample, the tensile speed of the sample was set to 5mm/min in accordance with "determination of tensile properties of GB/T1040 plastic", the mechanical strength of the drying net was measured, three samples were prepared for each sample, the measurement results were averaged, and the results were filled in table 1.
TABLE 1
Performance detection analysis
As can be seen from Table 1, the tensile strength and breaking strength of examples 1-3 are both above 4.0MPa and above 120N, so that the dry webs prepared by the method have good mechanical strength; the weight loss ratios of examples 1-3 were all below 0.8%, thus showing that the drying webs prepared in this application had good hydrolysis resistance.
As can be seen from table 1, example 4 differs from example 3 only in that: example 3 weighed 7.975kg of zinc nitrate hexahydrate, 3.797kg of hexamethylenetetramine, 0.228kg of hydrofluoric acid, example 4 weighed 6.61kg of zinc nitrate hexahydrate, 5.085kg of hexamethylenetetramine, 0.305kg of hydrofluoric acid, example 3 having a tensile strength of 5.9MPa, a breaking strength of 135N, example 4 having a tensile strength of 4.4MPa and a breaking strength of 109N, example 4 having a tensile strength lower than example 3, this is because the amount of hexamethylenetetramine in example 4 is increased, the amount of zinc nitrate hexahydrate is decreased, the amount of zinc source provided is decreased, so that more modified hydrophobic zinc nitrate and more zinc nitrate particles are difficult to obtain, therefore, it is difficult to completely fill the composite emulsion, and the mechanical properties of the whole emulsion are reduced, so that the tensile strength and breaking strength of example 4 are reduced.
The weight loss ratio of example 4 is 0.82%, and the weight loss ratio is increased compared with example 3, because the hydrolysis resistance of the polymerized emulsion is reduced to some extent and the contact angle of the drying net and the water body are newly increased after the content of hexamethylenetetramine in example 4 is reduced, so that the hydrolysis resistance of example 4 is reduced and the weight loss ratio is increased to some extent.
As can be seen from table 1, the only difference between example 5 and example 3 is that: 8.705kg of zinc nitrate hexahydrate, 3.109kg of hexamethylenetetramine, 0.186kg of hydrofluoric acid, 4.8MPa of tensile strength and 104N of breaking strength of example 5 and example 3, both the tensile strength and the breaking strength of example 5 are reduced compared with example 3, because hexamethylenetetramine is used as modified hydrophobic zinc nitrate to provide hydroxide radicals, and the proportion of hexamethylenetetramine in example 5 is reduced, so that the content of hydroxide radicals is reduced, the stability of the modified hydrophobic zinc nitrate is reduced, the mechanical property of the modified hydrophobic zinc nitrate is reduced, the strength of the whole hydrolysis-resistant layer is reduced, and the tensile strength and the breaking strength of example 5 are reduced.
As can be seen from table 1, example 6 differs from example 3 only in that: 8.338kg of zinc nitrate hexahydrate, 3.625kg of hexamethylenetetramine, 0.037kg of hydrofluoric acid, 4.3MPa of tensile strength and 105N of breaking strength of example 6, and the tensile strength and breaking strength of example 6 are both reduced compared with those of example 3 because the modified hydrophobic zinc nitrate particles produced by reducing the content of hydrofluoric acid have non-uniform particle size, poor particle balling, severe crushing and poor uniformity, so the filling effect of the composite emulsion is reduced, the mechanical property of the composite emulsion is reduced, and the tensile strength and breaking strength of example 6 are reduced.
The weight loss rate of example 6 is 0.88%, which is reduced compared with example 3 because the performance of the modified zinc oxide is reduced, which has an effect on the hydrophobic performance of the coating, so that the adhesion performance of the emulsion to the drying net is reduced, and the hydrolysis-resistant layer slowly falls off under a long-term humid environment, so that the performance of the hydrolysis-resistant layer is reduced, and thus the weight loss rate of example 6 after 28 days is increased.
As can be seen from table 1, example 7 differs from example 3 only in that: 8.094kg of zinc nitrate hexahydrate, 3.625kg of hexamethylenetetramine, 0.037kg of hydrofluoric acid, 4.5MPa of tensile strength and 105N of breaking strength in example 7, and the tensile strength and breaking strength of example 7 are both reduced compared with those in example 3, because zinc hydroxide fluoride is generated after the content of hydrofluoric acid is increased, and a blocky substance is generated, so that the modified hydrophobic zinc nitrate is agglomerated, the dispersing effect of the modified hydrophobic zinc nitrate is reduced, the stability of the modified hydrophobic zinc nitrate is reduced, the improvement effect of the mechanical strength of the composite emulsion is improved slightly, and therefore the tensile strength and breaking strength of example 7 are both reduced.
The weight loss rate of example 7 was 0.84%, which was increased compared to example 3 because the stability of the hydrolysis-resistant layer attached to the surface of the drying wire was decreased due to partial caking of the modified zinc oxide, and the hydrolysis-resistant layer was separated from the drying wire after a period of time of the test environment, so that the hydrolysis-resistant property of the drying wire was decreased, and thus the weight loss rate of example 7 was increased.
As can be seen from table 1, example 8 differs from example 3 only in that: when the composite emulsion is prepared in example 3, 0.35kg of modified hydrophobic zinc nitrate is weighed, 50kg of the composite emulsion is weighed, when the composite emulsion is prepared in example 8, 0.5kg of modified hydrophobic zinc nitrate is weighed, 49.85kg of polymerized emulsion is weighed, the tensile strength of example 8 is 4.7MPa, the breaking strength is 108N, and the tensile strength and the breaking strength of example 8 are reduced compared with those of example 3, because the agglomeration among zinc nitrate particles is increased after the addition amount of the modified hydrophobic zinc nitrate is increased, the particle size of the emulsion is increased, gel is formed, the conversion rate of the monomer is reduced, the stability of the emulsion is reduced, and the mechanical property of the emulsion in example 8 is reduced.
The weight loss ratio of example 8 was 0.82%, which was increased as compared to example 3 because the emulsion after gel formation was difficult to adhere to the surface of the drying wire, so that the thickness of the hydrolysis-resistant layer was decreased, and after a while, the hydrolysis-resistant layer was gradually separated from the drying wire, the hydrolysis-resistant performance of the drying wire was decreased, and the rate of the drying wire of example 8 was increased.
As can be seen from table 1, example 9 differs from example 3 only in that: in example 9, 0.2kg of modified hydrophobic zinc nitrate was weighed, 50.15kg of the polymerized emulsion was weighed, the tensile strength of example 8 was 4.3MPa, and the breaking strength was 102N, and in example 9, both the tensile strength and the breaking strength were reduced compared to example 3, because the modified hydrophobic zinc nitrate was added in an amount such that the modified nitric acid property filled in the emulsion was reduced, the interfacial action with the emulsion was reduced, and the physical properties of the entire composite emulsion were reduced, and thus the mechanical strength of example 9 was reduced.
The weight loss ratio of example 9 was 0.9%, which was increased compared to example 3 because the hydrophobic property of the anti-hydrolysis agent decreased and therefore the anti-hydrolysis property of the dried web decreased, since the water contact angle decreased after decreasing the proportion of the modified hydrophobic zinc nitrate, and the weight loss ratio of example 9 increased.
As can be seen from table 1, comparative example 1 differs from example 3 only in that: the addition amount of the initiator in comparative example 1 is 0.15kg, the tensile strength of comparative example 1 is 4.0MPa, the breaking strength is 95N, and comparative example 1 is reduced compared with example 3 because the addition amount of the initiator is too much, the number of free radicals on the surface of the emulsion is increased, the stability of the reaction is reduced, the binding capacity between the emulsion and the modified nitric acid is reduced, and the mechanical properties of the hydrolysis resistant agent of comparative example 1 are reduced.
The weight loss ratio of comparative example 1 was 0.94%, and the weight loss ratio was increased compared to example 3 because the bonding ability between the emulsions was decreased and thus the adhesion ability was also decreased, so that the connection property between the emulsion and the drying net was decreased and after a certain time, the hydrolysis-resistant layer was separated from the drying net, the hydrolysis resistance of the drying net was decreased, and the weight loss ratio was increased.
As can be seen from table 1, comparative example 2 differs from example 3 only in that: in comparative example 2, modified hydrophobic zinc nitrate was replaced with ordinary zinc nitrate, the tensile strength of comparative example 2 was 3.7MPa, and the breaking strength was 88N, and in comparative example 2, compared with example 3, both the tensile strength and the breaking strength were reduced because unmodified zinc nitrate had poor dispersibility and was easily agglomerated in the emulsion, so that zinc nitrate was agglomerated, and the zinc nitrate was not uniformly dispersed in the emulsion system, and thus the mechanical properties of the dried web of comparative example 2 were reduced.
The weight loss ratio of comparative example 2 was 0.99%, which was decreased compared to example 3 because the composite emulsion system was agglomerated, resulting in a decrease in the stability of the thermal emulsion, and the hydrolysis-resistant layer was partially peeled off after being attached to the surface of the drying wire for a period of time, resulting in a decrease in the hydrophobicity of the drying wire, and thus the hydrolysis resistance of comparative example 2 was decreased.
The reason why the tensile strength and breaking strength of the composite emulsifier in comparative example 3 and the tensile strength and breaking strength of the composite emulsifier in comparative example 4 are both reduced because only a single emulsifier is used, the overall performance of the emulsifier is reduced, the particle size of the emulsion is increased, the stability of the emulsion is reduced, and the mechanical properties of the dry net in comparative example 3 and the dry net in comparative example 4 are reduced is that 1.18kg of sodium dodecyl sulfate, 0kg of octyl phenol polyoxyethylene ether, 0kg of sodium dodecyl sulfate and 1.18kg of octyl phenol polyoxyethylene ether are weighed in the composite emulsifier in comparative example 3.
The present embodiment is merely illustrative and not restrictive, and various changes and modifications may be made by persons skilled in the art without departing from the scope of the present invention as defined in the appended claims. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. A textile auxiliary for a hydrolysis-resistant drying net is characterized in that: the composition comprises the following components in parts by mass:
50-60 parts of composite emulsion and 1-2 parts of antioxidant;
the composite emulsion comprises, by mass, 0.25-0.45 part of modified hydrophobic zinc nitrate, 0.25-0.5 part of an initiator, and the balance of a polymerization emulsion, wherein the polymerization emulsion comprises the following components:
20-26 parts of methyl methacrylate, 30-35 parts of butyl acrylate, 1.08-1.18 parts of composite emulsifier, 40-60 parts of deionized water and 0.25-0.27 part of sodium bicarbonate.
2. A hydrolysis resistant textile additive for dryer webs as claimed in claim 1, wherein: the modified hydrophobic zinc nitrate raw materials comprise zinc nitrate hexahydrate, hexamethylenetetramine and hydrofluoric acid.
3. A hydrolysis resistant textile additive for dryer webs as claimed in claim 2, wherein: the mass ratio of the zinc nitrate hexahydrate to the hexamethylenetetramine to the hydrofluoric acid is (1.8-2.3) to (1) (0.05-0.07).
4. A hydrolysis resistant textile additive for dryer webs as claimed in claim 2, wherein: the modified hydrophobic zinc nitrate is prepared by the following method:
dissolving zinc nitrate hexahydrate to obtain a zinc nitrate hexahydrate aqueous solution, dissolving hexamethylenetetramine to obtain a hexamethylenetetramine aqueous solution, mixing the zinc nitrate hexahydrate aqueous solution and the hexamethylenetetramine aqueous solution, adding hydrofluoric acid, fully mixing to obtain a mixed solution, heating to 85-95 ℃ for reaction, cooling to room temperature, performing suction filtration, washing, and drying at 80 ℃ to obtain the modified hydrophobic zinc nitrate.
5. A hydrolysis resistant textile auxiliary for dryer nets according to claim 1, characterized in that: the mass ratio of the polymerized emulsion to the modified hydrophobic zinc nitrate is as follows: 1:(0.006-0.008).
6. A hydrolysis resistant textile additive for dryer webs as claimed in claim 1, wherein: the composite emulsion is prepared by the following method:
mixing deionized water, a composite emulsifier and sodium bicarbonate, adding methyl methacrylate and butyl acrylate, stirring and mixing at room temperature to obtain a uniform pre-emulsion, then adding modified hydrophobic zinc nitrate, stirring uniformly, heating to 80 ℃, then adding an initiator for reaction, cooling to room temperature after reaction, and adjusting the pH value to 8-9 to obtain the composite emulsion.
7. A hydrolysis resistant textile additive for dryer webs as claimed in claim 1, wherein: the initiator is dibenzoyl peroxide.
8. A hydrolysis resistant textile auxiliary for dryer nets according to claim 6, characterized in that: the reaction temperature in the reaction of adding the initiator is 75-85 ℃, and the reaction time is 1-2 h.
9. A hydrolysis resistant textile additive for dryer webs as claimed in claim 1, wherein: the compound emulsifier comprises a mixture of octylphenol polyoxyethylene ether and lauryl sodium sulfate.
10. A hydrolysis resistant textile additive for dryer webs as claimed in claim 1, wherein: the antioxidant is tert-butyl-4-hydroxyanisole.
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