CN115434182B - Antibacterial oil-resistant baking paper and preparation method thereof - Google Patents
Antibacterial oil-resistant baking paper and preparation method thereof Download PDFInfo
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- CN115434182B CN115434182B CN202211119833.0A CN202211119833A CN115434182B CN 115434182 B CN115434182 B CN 115434182B CN 202211119833 A CN202211119833 A CN 202211119833A CN 115434182 B CN115434182 B CN 115434182B
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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
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/24—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/32—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming a linkage containing silicon in the main chain of the macromolecule
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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
- 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
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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
- 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
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/59—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon
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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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
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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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
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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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/71—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes
- D21H17/74—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes of organic and inorganic material
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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
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/34—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising cellulose or derivatives thereof
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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
- 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
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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
- 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
- D21H21/36—Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents
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- 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
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Abstract
The application discloses antibacterial oil-resistant baking paper and a preparation method thereof, and belongs to the technical field of chemically modified natural fibers; the modified coating is prepared from the following raw materials in parts by weight: 10-20 parts of modified nano cellulose, 20-40 parts of composite nano particles and 50-80 parts of silicone oil; the modified nano-cellulose is silylated nano-cellulose, and the composite nano-particles are prepared from chitosan, adipic anhydride, nano-silver and nano-montmorillonite.
Description
Technical Field
The application relates to antibacterial oil-resistant baking paper and a preparation method thereof, and belongs to the technical field of chemically modified natural fibers.
Background
The baking paper is food paper, can be widely used for baking desserts, roasting foods, microwaves for foods, packaging foods and the like, is mainly used for isolating baking trays from foods (such as bread or cakes) during roasting or baking at present, can keep the taste of the foods, is clean and convenient, can replace part of baking tinfoil (also called aluminum foil paper), and is low in cost and environment-friendly.
At present, the baking paper often does not have antibacterial performance, a small amount of baking paper with antibacterial performance gradually loses efficacy under high-temperature baking or long-term storage state, and the baking paper cannot be reused for multiple times and does not have lasting antibacterial capability; most of the baking papers in the prior art have uneven oil resistance, and the polymers containing perfluoroalkyl groups are often added with good oil resistance, so that the baking papers have the defects of strong bioaccumulation and difficult degradation, and particularly have certain harm when being contacted with food for a long time.
Disclosure of Invention
In order to solve the problems, the antibacterial and oil-resistant baking paper and the preparation method thereof are provided, and the baking paper has excellent durable antibacterial performance, excellent oil resistance, good paper strength, safety, no toxicity and repeated use.
According to one aspect of the present application, there is provided an antibacterial oil-resistant baked paper comprising a fibrous base paper and a modified coating layer coated on the surface of the fibrous base paper;
the modified coating is prepared from the following raw materials in parts by weight: 10-20 parts of modified nano cellulose, 20-40 parts of composite nano particles and 50-80 parts of silicone oil; the modified nano-cellulose is silylated nano-cellulose, and the composite nano-particles are prepared from chitosan, adipic anhydride, nano-silver and nano-montmorillonite.
Alternatively, the silylated nanocellulose is prepared from nanocellulose and methyltrimethoxysilane.
Optionally, the weight ratio of nanocellulose to methyltrimethoxysilane is (3-5): 1.
optionally, the preparation method of the modified nanocellulose comprises the steps of adding the nanocellulose into an ethanol solution, carrying out ultrasonic vibration, adding methyltrimethoxysilane, stirring uniformly, standing for reaction, and drying.
Preferably, the mass fraction of the ethanol is 70%, the ultrasonic power is 80W, and the dosage of the ethanol is 20 times of the weight of the nanocellulose. Preferably, it is dried at room temperature.
Optionally, the ultrasonic time is 5-10min, the stirring speed is 200-400r/min, the stirring time is 2-5min, and the standing time is 2-5h.
Optionally, the composite nano particles are prepared from chitosan, adipic anhydride, nano silver and nano montmorillonite, wherein the weight ratio of the chitosan to the adipic anhydride to the nano silver to the nano montmorillonite is 1: (2-4): (0.2-0.5): (1-3).
Optionally, the preparation method of the composite nano-particles comprises the steps of adding chitosan into acetic acid solution, adding adipic anhydride, stirring, standing for reaction, adding ethanol and sodium carbonate saturated solution, washing with ethanol to neutrality, adding nano-silver and nano-montmorillonite, performing ultrasonic vibration, filtering to obtain filaments, washing with distilled water for three times, and performing vacuum drying to obtain the composite nano-particles.
Preferably, the mass fraction of the acetic acid solution is 5%, the consumption of acetic acid is 30 times of the weight of chitosan, the mass fraction of ethanol is 70%, the ultrasonic power is 80W, the ultrasonic time is 3min, and the vacuum drying time is 3-5h.
Optionally, the standing reaction temperature is 25 ℃, the stirring time is 40-60min, the stirring speed is 50-80r/min, the standing reaction time is 5-10h, and the vacuum drying temperature is 40-50 ℃.
According to another aspect of the present application, there is also provided a method for preparing the above antibacterial oil-resistant baked paper, comprising the steps of:
(1) Mixing the modified nano cellulose, the composite nano particles and the silicone oil, uniformly stirring and heating;
(2) And (3) uniformly coating the coating obtained in the step (1) on the fiber base paper by using a coating machine, drying, and carrying out calendaring, rolling and slitting after drying to obtain the antibacterial and oil-resistant baking paper.
Optionally, in the step (1), the heating temperature is 50-80 ℃, the stirring rotation speed is 100-200r/min, and the stirring time is 5-10min; the coating weight in the step (2) is 1.5-2.5g/m 2 The drying temperature is 60-80 ℃.
In the present application, "room temperature" means 25 ℃.
The beneficial effects of the application include, but are not limited to:
1. according to the antibacterial and oil-resistant baking paper disclosed by the application, the silylated modified nanocellulose is used, the cellulose surface of the cellulose has lower surface energy, and the surface of the cellulose can stably form a-Si-O-C-shaped hydrophobic and oleophobic three-dimensional network structure, so that good adsorption sites are provided for the composite nanoparticles while certain hydrophobic and oleophobic properties are achieved, the composite nanoparticles can be stably adsorbed on a fiber net and are not easy to run off, and the durable antibacterial, heat-resistant and oil-resistant properties can be provided.
2. According to the antibacterial and oil-resistant baking paper, the adipic anhydride is used for acylating and modifying the chitosan, and the amino group and the hydroxyl group of the chitosan react with the anhydride to generate the acylated chitosan derivative, so that the high-temperature resistance and toughness of the baking paper are improved, and the adsorption capacity of the chitosan is increased, and meanwhile, the Ag can be stably added + The nano silver is effectively adsorbed, the loss of nano silver is greatly reduced, and the positive charge of chitosan and the negative charge on the surface of microbial cells interact to change the permeability of microbial cell membranes, so that the nano silver has good sterilization and bacteriostasis effects, and the Ag with strong stable adsorption sterilization effect + Thus, the whole baking paper has lasting and excellent antibacterial performance and long service life;
meanwhile, the nano montmorillonite is spliced between the chitosan in a sheet structure, so that the oleophobic performance is improved, the structure is compact, and the oil seepage prevention effect is good.
3. According to the antibacterial and oil-resistant baking paper disclosed by the application, the excessive silicon-based surface roughness of cellulose is avoided by limiting the weight ratio of nano cellulose to methyltrimethoxysilane, so that the formed three-dimensional network is stable, the strength is good, and the adsorption and the combination of composite nano particles are facilitated.
4. According to the antibacterial and oil-resistant baking paper, the weight ratio of chitosan, adipic anhydride, nano silver and nano montmorillonite is limited, so that excessive acylated chitosan is avoided, nano substances are better dispersed, aggregation and the like are reduced, the composite nano particles can be uniformly dispersed in a three-dimensional network of silicone oil and modified nano cellulose, the nano substances can be uniformly dispersed in the composite nano particles, and the stability of oil-resistant and bactericidal performance is ensured.
5. The preparation method of the antibacterial oil-resistant baking paper is simple in steps, easy to operate, environment-friendly and suitable for large-scale production and application.
Detailed Description
The present application is described in detail below with reference to examples, but the present application is not limited to these examples.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The reagents or materials used in the present application may be purchased in conventional manners, and unless otherwise indicated, they may be used in conventional manners in the art or according to the product specifications. In addition, any methods and materials similar or equivalent to those described herein can be used in the methods of the present application. The preferred methods and materials described in this patent are illustrative only.
In addition, the application adopts the existing drying cylinder equipment for drying, and the existing equipment is adopted for calendaring, rolling and slitting, and the temperature of a compression roller is 70 ℃. Chitosan is a commercial product with a deacetylation degree of 87% and a molecular weight of 800kDa.
EXAMPLE 1 baked paper 1#
The baking paper No. 1 consists of fiber base paper and a modified coating coated on the surface of the fiber base paper, wherein the modified coating is prepared from the following raw materials in parts by weight: 15 parts of modified nano-cellulose, 30 parts of composite nano-particles and 60 parts of silicone oil.
Wherein the modified nanocellulose is silylated nanocellulose, and the weight ratio of nanocellulose to methyltrimethoxysilane is 4:1, a step of;
the preparation method comprises adding nanocellulose into ethanol solution, performing ultrasonic vibration, adding methyltrimethoxysilane, stirring uniformly, standing for reaction, and drying to obtain the final product; wherein the ultrasonic time is 8min, the stirring speed is 300r/min, the stirring time is 4min, the standing time is 3h, the mass fraction of the ethanol is 70%, the ultrasonic power is 80W, the using amount of the ethanol is 20 times of the weight of the nanocellulose, and the nanocellulose is dried at room temperature.
Wherein, the composite nano particles are prepared from chitosan, adipic anhydride, nano silver and nano montmorillonite, and the weight ratio is 1:3:0.3:2;
the preparation method comprises the steps of adding chitosan into acetic acid solution, adding adipic anhydride, stirring, standing for reaction, adding ethanol and sodium carbonate saturated solution, washing with ethanol to neutrality, adding nano silver and nano montmorillonite, performing ultrasonic vibration, filtering to obtain filiform substances, washing with distilled water for three times, and performing vacuum drying to obtain composite nano particles; the mass fraction of the acetic acid solution is 5%, the consumption of acetic acid is 30 times of the weight of chitosan, the mass fraction of ethanol is 70%, the ultrasonic power is 80W, the ultrasonic time is 3min, and the vacuum drying time is 4h; the standing reaction temperature is 25 ℃, the stirring time is 50min, the stirring speed is 60r/min, the standing reaction time is 8h, and the vacuum drying temperature is 45 ℃.
The preparation method of the baked paper No. 1 comprises the following steps:
(1) Mixing the modified nano cellulose, the composite nano particles and the silicone oil, uniformly stirring and heating;
(2) And (3) uniformly coating the coating obtained in the step (1) on the fiber base paper by using a coating machine, drying, and carrying out calendaring, rolling and slitting after drying to obtain the antibacterial and oil-resistant baked paper No. 1.
Wherein the heating temperature in the step (1) is 60 ℃, the stirring speed is 150r/min, and the stirring time is 8min; the coating weight in the step (2) is 2g/m 2 The drying temperature was 70 ℃.
EXAMPLE 2 baked paper 2#
The baking paper No. 2 consists of fiber base paper and a modified coating coated on the surface of the fiber base paper, wherein the modified coating is prepared from the following raw materials in parts by weight: 10 parts of modified nano-cellulose, 20 parts of composite nano-particles and 50 parts of silicone oil.
Wherein the modified nanocellulose is silylated nanocellulose, and the weight ratio of nanocellulose to methyltrimethoxysilane is 3:1, a step of;
the preparation method comprises adding nanocellulose into ethanol solution, performing ultrasonic vibration, adding methyltrimethoxysilane, stirring uniformly, standing for reaction, and drying to obtain the final product; wherein the ultrasonic time is 5min, the stirring speed is 200r/min, the stirring time is 2min, the standing time is 2h, the mass fraction of the ethanol is 70%, the ultrasonic power is 80W, the ethanol dosage is 20 times of the weight of the nanocellulose, and the nanocellulose is dried at room temperature.
Wherein, the composite nano particles are prepared from chitosan, adipic anhydride, nano silver and nano montmorillonite, and the weight ratio is 1:2:0.2:1, a step of;
the preparation method comprises the steps of adding chitosan into acetic acid solution, adding adipic anhydride, stirring, standing for reaction, adding ethanol and sodium carbonate saturated solution, washing with ethanol to neutrality, adding nano silver and nano montmorillonite, performing ultrasonic vibration, filtering to obtain filiform substances, washing with distilled water for three times, and performing vacuum drying to obtain composite nano particles; the mass fraction of the acetic acid solution is 5%, the consumption of acetic acid is 30 times of the weight of chitosan, the mass fraction of ethanol is 70%, the ultrasonic power is 80W, the ultrasonic time is 3min, and the vacuum drying time is 3h; the standing reaction temperature is 25 ℃, the stirring time is 40min, the stirring speed is 50r/min, the standing reaction time is 5h, and the vacuum drying temperature is 40 ℃.
The preparation method of the baked paper No. 2 comprises the following steps:
(1) Mixing the modified nano cellulose, the composite nano particles and the silicone oil, uniformly stirring and heating;
(2) And (3) uniformly coating the coating obtained in the step (1) on the fiber base paper by using a coating machine, drying, and carrying out calendaring, rolling and slitting after drying to obtain the antibacterial and oil-resistant baked paper No. 2.
Wherein the heating temperature in the step (1) is 50 ℃, the stirring speed is 100r/min, and the stirring time is 5min; the coating amount in the step (2) was 1.5g/m 2 The drying temperature is 60 ℃.
EXAMPLE 3 baked paper 3#
The baking paper 3# consists of fiber base paper and a modified coating coated on the surface of the fiber base paper, wherein the modified coating is prepared from the following raw materials in parts by weight: 20 parts of modified nano-cellulose, 40 parts of composite nano-particles and 80 parts of silicone oil.
Wherein the modified nanocellulose is silylated nanocellulose, and the weight ratio of nanocellulose to methyltrimethoxysilane is 5:1, a step of;
the preparation method comprises adding nanocellulose into ethanol solution, performing ultrasonic vibration, adding methyltrimethoxysilane, stirring uniformly, standing for reaction, and drying to obtain the final product; wherein the ultrasonic time is 10min, the stirring speed is 400r/min, the stirring time is 5min, the standing time is 5h, the mass fraction of the ethanol is 70%, the ultrasonic power is 80W, the ethanol dosage is 20 times of the weight of the nanocellulose, and the nanocellulose is dried at room temperature.
Wherein, the composite nano particles are prepared from chitosan, adipic anhydride, nano silver and nano montmorillonite, and the weight ratio is 1:4:0.5:3, a step of;
the preparation method comprises the steps of adding chitosan into acetic acid solution, adding adipic anhydride, stirring, standing for reaction, adding ethanol and sodium carbonate saturated solution, washing with ethanol to neutrality, adding nano silver and nano montmorillonite, performing ultrasonic vibration, filtering to obtain filiform substances, washing with distilled water for three times, and performing vacuum drying to obtain composite nano particles; the mass fraction of the acetic acid solution is 5%, the consumption of acetic acid is 30 times of the weight of chitosan, the mass fraction of ethanol is 70%, the ultrasonic power is 80W, the ultrasonic time is 3min, and the vacuum drying time is 5h; the standing reaction temperature is 25 ℃, the stirring time is 60min, the stirring speed is 80r/min, the standing reaction time is 10h, and the vacuum drying temperature is 50 ℃.
The preparation method of the baked paper 3# comprises the following steps:
(1) Mixing the modified nano cellulose, the composite nano particles and the silicone oil, uniformly stirring and heating;
(2) And (3) uniformly coating the coating obtained in the step (1) on the fiber base paper by using a coating machine, drying, and carrying out calendaring, rolling and slitting after drying to obtain the antibacterial and oil-resistant baked paper No. 3.
Wherein the heating temperature in the step (1) is 80 ℃, the stirring rotation speed is 200r/min, and the stirring time is 10min; the coating weight in the step (2) was 2.5g/m 2 The drying temperature was 80 ℃.
Comparative example 1# comparative baked paper 1#
Comparative example 1 differs from example 1 in that: in comparative example 1 methyltrimethoxysilane was not used.
Comparative example 2# comparative baked paper 2#
Comparative example 2 is different from example 1 in that: no adipic anhydride was used in comparative example 2.
Comparative example 3# comparative baked paper 3#
Comparative example 3 is different from example 1 in that: comparative example 3 does not use chitosan or adipic anhydride.
Comparative example 4# comparative baked paper 4#
Comparative example 4 differs from example 1 in that: no nano montmorillonite was used in comparative example 4.
Comparative example 5# comparative baked paper 5#
Comparative example 5 is different from example 1 in that: the weight ratio of nanocellulose to methyltrimethoxysilane in comparative example 5 is 1:1.
comparative example 6# comparative baked paper 6#
Comparative example 6 differs from example 1 in that: the weight ratio of chitosan to adipic anhydride in comparative example 6 was 1:6.
example 4 characterization of Performance
1. Mechanical property test
(1) Testing tensile strength of baked paper 1# -3# and comparative baked paper 1# -6# according to GB/T12914;
(2) Cutting baked paper 1# -3# and contrast baked paper 1# -6# into strips with a length of 15cm and a width of 2cm, bonding and overlapping the two strips with a length of 10cm by using a common adhesive tape with a width of 2cm, and testing on a tensile machine to obtain a peeling force, wherein the peeling force is recorded as a peeling strength in N. The average was taken in 3 replicates. The results are shown in Table 1.
TABLE 1 determination of mechanical Properties
The result shows that the baked paper 1# 3 prepared by the raw materials and the method has excellent tensile strength and low peel strength, and is easy to peel and difficult to adhere to food.
The comparative baked paper No. 1 has poorer performance, and the analysis shows that the cellulose is not modified and has poor mechanical property; the comparative baking paper No. 2 chitosan is unmodified and has poor performance; compared with baking paper 3#, the composite nano particles which are uniformly dispersed cannot be formed finally without chitosan and adipic anhydride, and the performance is poor; compared with baking paper No. 4, the final performance is poor because nano montmorillonite is not used; the weight ratio of the comparative baked paper No. 5 nanocellulose to the methyltrimethoxysilane is not within the limit of the application, and the final performance is poor; the weight ratio of the comparative baked paper 6# chitosan to adipic anhydride is not within the scope of the present application and the final properties are poor.
2. Antibacterial property test
The antibacterial rate of the baked paper 1# -3# and the comparative baked paper 1# -6# was tested according to GB/T21866, and the results are shown in Table 2.
Table 2 antibacterial experimental determination
The result shows that the baked paper 1# 3 prepared by the raw materials and the method has excellent antibacterial effect, the antibacterial rate in the day is over 99.8 percent, the continuous antibacterial capability is strong, the antibacterial rate after one month is over 98 percent, and the baked paper can be repeatedly used for many times.
3. Heat and oil resistance test
The oil repellency grade of baked paper 1# -3# and comparative baked paper 1# -6# was determined according to TAPPI standard T559 pm-96. And measuring the high temperature resistance of the baked paper 1# -3# and the contrast baked paper 1# -6# according to QB/T1010-2010. The results are shown in Table 3.
TABLE 3 oil and heat resistance test
The result shows that the baked paper 1# 3 prepared by the raw materials and the method has excellent oil resistance, oil resistance grade of more than 11, excellent high temperature resistance and highest use temperature of more than 250 ℃.
The above description is only an example of the present application, and the scope of the present application is not limited to the specific examples, but is defined by the claims of the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the technical idea and principle of the present application should be included in the protection scope of the present application.
Claims (8)
1. An antibacterial oil-resistant baking paper is characterized by comprising a fiber base paper and a modified coating coated on the surface of the fiber base paper;
the modified coating is prepared from the following raw materials in parts by weight: 10-20 parts of modified nano cellulose, 20-40 parts of composite nano particles and 50-80 parts of silicone oil;
the modified nano-cellulose is silylated nano-cellulose, and the composite nano-particles are prepared from chitosan, adipic anhydride, nano-silver and nano-montmorillonite;
the preparation method of the composite nano-particles comprises the steps of adding chitosan into acetic acid solution, adding adipic anhydride, stirring, standing for reaction, adding ethanol and sodium carbonate saturated solution, washing with ethanol to be neutral, adding nano-silver and nano-montmorillonite, performing ultrasonic vibration, filtering to obtain filiform substances, washing with distilled water for three times, and performing vacuum drying to obtain the composite nano-particles; the standing reaction temperature is 25 ℃, the stirring time is 40-60min, the stirring speed is 50-80r/min, the standing reaction time is 5-10h, and the vacuum drying temperature is 40-50 ℃.
2. The baked paper of claim 1, wherein the silylated nanocellulose is prepared from nanocellulose and methyltrimethoxysilane.
3. The paper according to claim 2, wherein the weight ratio of nanocellulose and methyltrimethoxysilane is (3-5): 1.
4. the baked paper according to claim 3, wherein the modified nanocellulose is prepared by adding nanocellulose into ethanol solution, performing ultrasonic vibration, adding methyltrimethoxysilane, stirring uniformly, standing for reaction, and drying.
5. The baked paper according to claim 4, wherein the ultrasonic time is 5 to 10min, the stirring rate is 200 to 400r/min, the stirring time is 2 to 5min, and the standing time is 2 to 5h.
6. The baked paper of claim 1, wherein the weight ratio of chitosan, adipic anhydride, nano silver to nano montmorillonite is 1: (2-4): (0.2-0.5): (1-3).
7. A method for preparing the antibacterial and oil-resistant baked paper as claimed in any one of claims 1 to 6, comprising the steps of:
(1) Mixing the modified nano cellulose, the composite nano particles and the silicone oil, uniformly stirring and heating;
(2) And (3) uniformly coating the coating obtained in the step (1) on the fiber base paper by using a coating machine, drying, and carrying out calendaring, rolling and slitting after drying to obtain the antibacterial and oil-resistant baking paper.
8. The process according to claim 7, wherein the heating temperature in step (1)50-80 ℃, stirring speed of 100-200r/min and stirring time of 5-10min; the coating weight in the step (2) is 1.5-2.5g/m 2 The drying temperature is 60-80 ℃.
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| CN110777566A (en) * | 2019-11-08 | 2020-02-11 | 广东天银实业有限公司 | Degradable waterproof and oilproof coating on food packaging paper |
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| CN113308933A (en) * | 2021-06-21 | 2021-08-27 | 山东盛合纸塑包装有限公司 | Antibacterial baking paper and preparation process thereof |
| 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 |
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