CN116063899B - Nano composite coating for packaging material - Google Patents

Nano composite coating for packaging material Download PDF

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Publication number
CN116063899B
CN116063899B CN202310045349.6A CN202310045349A CN116063899B CN 116063899 B CN116063899 B CN 116063899B CN 202310045349 A CN202310045349 A CN 202310045349A CN 116063899 B CN116063899 B CN 116063899B
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parts
coating
stirring
packaging material
deionized water
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CN116063899A (en
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章福春
阳康发
徐易阳
叶法保
彭传勇
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Anhui Jinyu Iron Can Co ltd
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Anhui Jinyu Iron Can Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/24—Electrically-conducting paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/04—Antistatic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/10—Transparent films; Clear coatings; Transparent materials

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Plant Pathology (AREA)
  • Paints Or Removers (AREA)

Abstract

The invention discloses a nanocomposite coating for packaging materials, which is obtained by coating a nanocomposite coating, wherein the nanocomposite coating comprises the following raw materials in parts by weight: 40-60 parts of epoxy resin, 15-25 parts of ethyl acrylate, 12-15 parts of nano titanium dioxide, 10-15 parts of plant nano cellulose, 3-5 parts of antifouling auxiliary monomer, 1-3 parts of sodium stearate, 0.5-1 part of emulsifier OP-10,0.5-1 part of initiator potassium persulfate, 1-3 parts of carboxymethyl cellulose and 40-50 parts of deionized water; in the preparation of the coating, the antifouling additive monomer is dispersed and adsorbed in the plant nanocellulose and then is emulsified and copolymerized with ethyl acrylate to form a uniform system, the obtained coating has better transparency, can permanently maintain the antibacterial property, the waterproof property, the antistatic antifouling property and the like of the coating, and expands the application field of the coating on packaging.

Description

Nano composite coating for packaging material
Technical Field
The invention relates to the technical field of packaging, in particular to a nanocomposite coating for packaging materials.
Background
The common coating claw type used for packaging in the current market is epoxy resin coating, polyamide coating, organic fluorine coating and the like, and the antibacterial material is combined with the packaging technology, so that the packaging material can be endowed with lasting antibacterial and sterilizing performances, and the packaged product can obtain better quality guarantee and quality improvement effects. The usual antibacterial packaging materials are: antibacterial plastics, antibacterial glass, antibacterial ceramics, antibacterial paper, etc.
Food packaging is an important and special area in packaging where there is a higher safety requirement for materials. The antibacterial materials currently used for food packaging mainly comprise: silver-based antibacterial agents, inorganic antibacterial agents, and natural antibacterial agents. However, at present, food antibacterial agents have the problems of high price, adverse health, limited antibacterial and bacteriostatic durability, unstable performance and the like. The silver ion in the silver-based antibacterial agent is easy to dissolve, the durability is poor, and the silver ion is gradually released after the film is solidified for 24 hours, so that the antibacterial effect is achieved, and the antibacterial effect of the antibacterial powder coating is slow; and the food packaging products are often placed on a bare goods shelf, are easy to fall off and be stained with dust, and are easy to be subjected to electrostatic dust collection in a drying season, so that the antifouling and moistureproof capabilities of the coating are also the problem to be solved in the packaging coating.
Disclosure of Invention
The invention aims to provide a nanocomposite coating for packaging materials.
The aim of the invention can be achieved by the following technical scheme:
the nano composite coating for the packaging material is prepared by coating a nano composite coating, and the nano composite coating comprises the following raw materials in parts by weight: 40-60 parts of epoxy resin, 15-25 parts of ethyl acrylate, 12-15 parts of nano titanium dioxide, 10-15 parts of plant nano cellulose, 3-5 parts of antifouling auxiliary monomer, 1-3 parts of sodium stearate, 0.5-1 part of emulsifier OP-10,0.5-1 part of initiator potassium persulfate, 1-3 parts of carboxymethyl cellulose and 40-50 parts of deionized water.
Further, the preparation method of the plant nanocellulose comprises the following steps:
adding ramie fibers into a pulverizer for pulverizing, adding into a stirrer after pulverizing, adding deionized water, stirring at a rotating speed of 400-600r/min, adding sodium acetate solution with a mass concentration of 20-30% while stirring, continuously stirring at room temperature for 20-30min after the addition, adding sodium hydroxide aqueous solution with a mass concentration of 15-20%, heating to 80-90 ℃, preserving heat and stirring for 4-6h, naturally cooling to room temperature, filtering, washing with deionized water to neutrality, drying, and adding into a grinder for grinding and sieving to obtain plant nanocellulose with a diameter of 15-60 nm. Compared with the common natural cellulose and microcrystalline cellulose, the plant nanocellulose has many excellent properties, such as the characteristics of larger specific surface area, hyperfine structure, high hydrophilicity and the like, the special superfine microporous structure in the ramie fiber enables the ramie fiber to have strong adsorption capacity, the ramie fiber is a good coating filler, the ramie fiber also has good antibacterial and mildew-proof properties, is a natural anti-corrosion material, is used as a packaging material, particularly a food packaging material, is environment-friendly and safe, has a wide natural resource source, can be reasonably utilized, and reduces the production cost.
Further, the mass ratio of the ramie fibers to the deionized water is 1:1-1.5;
the mass ratio of the ramie fibers to the sodium acetate solution is 20-25:1;
the mass ratio of the ramie fibers to the sodium hydroxide aqueous solution is 10:4-5.
Further, the preparation method of the antifouling additive monomer comprises the following steps:
13-15g of ethyl 2- (dimethylamino) acrylate and 400-500ml of solvent anhydrous acetonitrile are added into a flask provided with a thermometer, a reflux condenser and nitrogen, nitrogen is introduced, the mixture is heated to 45-50 ℃ while stirring, 14.5-16g of 1-chloro-3, 3-trifluoropropane and 40-50ml of potassium iodide acetonitrile solution with the mass concentration of 15-18% are added, after the dropwise addition is finished, the temperature is continuously raised to 75-80 ℃, the temperature is kept for reaction for 8-12h, the solvent is distilled off under reduced pressure, the mixture is washed and separated by adopting an ethanol aqueous solution with the mass fraction of 10-15%, and the solution is distilled under reduced pressure by adopting a rotary evaporator, so that the antifouling auxiliary monomer is obtained.
Further, the preparation method of the nano composite coating comprises the following steps:
firstly, mixing 10-15 parts of plant nanocellulose with 20 parts of deionized water, uniformly stirring, adding 3-5 parts of antifouling additive monomer, stirring for 10-15min, and then placing into an ultrasonic water bath kettle for ultrasonic treatment for 2-3h;
secondly, adding 0.5-1 part of sodium stearate, 0.2-0.5 part of emulsifier OP-10, 10-15 parts of ethyl acrylate and 10-15 parts of deionized water into a stirrer for rapid emulsification for 10-15min, taking out the solution in the first step, adding the solution into the stirrer, adding 0.5-1 part of potassium persulfate, 0.3-0.5 part of emulsifier OP-10 and 5-10 parts of ethyl acrylate, uniformly mixing, heating to 55-65 ℃, preserving heat for emulsification for 2-3h, continuing to heat to 80-85 ℃ for curing for 20-30min, stopping heating, naturally cooling to room temperature, and filtering for later use;
and thirdly, uniformly mixing the solution prepared in the second step and the rest components in the formula, then adding the mixture into an extruder for extrusion, adding the extruded material into a ball mill for grinding, and sieving to obtain the nano composite coating.
Further, in the first step, the ultrasonic frequency is 30-45Hz, and the water bath temperature is 45-55 ℃.
Further, in the second step, the stirring speed during emulsification is 800-1000r/min.
Further, in the third step, the particle size of the nanocomposite coating is 10 to 50nm.
The invention has the beneficial effects that:
(1) The invention provides a nano composite coating for packaging materials, which is obtained by coating a nano composite coating, wherein plant nano cellulose is used as a coating filler, ramie fibers with good adsorption performance and antibacterial performance are used as raw materials, and the plant nano cellulose obtained after treatment is a natural anti-corrosion material and is used as a packaging material, especially a food packaging material, namely, the packaging material is environment-friendly and safe, has a wide natural resource source, can be reasonably utilized, and reduces the production cost;
(2) In the preparation process of the coating, the antifouling auxiliary monomer is dispersed and adsorbed in the plant nanocellulose, so that the particle size of the plant nanocellulose is reduced, the specific surface area of the antifouling auxiliary monomer is increased, and an even system can be formed by emulsifying and copolymerizing ethyl acrylate.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Preparation of plant nanocellulose:
adding 100g of ramie fibers into a pulverizer for pulverization, adding 120g of deionized water into a stirrer, stirring at a rotating speed of 500 r/min, adding 4.5g of 25% sodium acetate solution by mass concentration while stirring, continuously stirring at room temperature for 30min after the addition, then adding 50g of 20% sodium hydroxide aqueous solution by mass concentration, heating to 90 ℃, preserving heat and stirring for 6h, naturally cooling to room temperature, filtering, washing with deionized water to neutrality, drying, and adding into a grinder for grinding and sieving to obtain the plant nanocellulose with the diameter of 55 nm.
Example 2
Preparation of antifouling additive monomer:
adding 15g of ethyl 2- (dimethylamino) acrylate and 500ml of solvent anhydrous acetonitrile into a flask provided with a thermometer, a reflux condenser and nitrogen, keeping nitrogen to be introduced, heating to 50 ℃ while stirring, adding 16g of 1-chloro-3, 3-trifluoropropane and 50ml of potassium iodide acetonitrile solution with the mass concentration of 15%, continuously heating to 75 ℃ after the dripping is finished, preserving heat for reaction for 10 hours, distilling under reduced pressure to remove the solvent, washing with ethanol water solution with the mass fraction of 15%, separating liquid, and distilling under reduced pressure with a rotary evaporator to obtain the antifouling auxiliary monomer. The nuclear magnetic hydrogen spectrum result of the antifouling additive monomer is as follows: 1 H NMR(400MHz,CDCl 3 ):δ6.24(d,2H),5.65(t,1H),4.35(t,2H),3.58
(t,2H),3.29(s,6H),3.11(t,2H),2.24(t,2H)。
example 3
The nano composite coating for the packaging material comprises the following raw materials in parts by weight: 50 parts of epoxy resin, 20 parts of ethyl acrylate, 12 parts of nano titanium dioxide, 13 parts of plant nano cellulose, 4 parts of antifouling additive monomer, 2 parts of sodium stearate, 0.6 part of emulsifier OP-10, 0.6 part of initiator, 1 part of carboxymethyl cellulose and 44 parts of deionized water.
The preparation method of the paint used for the nano composite coating comprises the following steps:
firstly, mixing and stirring 13 parts of plant nanocellulose with 20 parts of deionized water uniformly, then adding 4 parts of antifouling additive monomer, stirring for 10 min, and then placing into an ultrasonic water bath kettle for ultrasonic treatment for 3h, wherein the ultrasonic frequency is 40Hz, and the water bath temperature is 50 ℃;
secondly, adding 1 part of sodium stearate, 0.3 part of emulsifier OP-10, 12 parts of ethyl acrylate and 15 parts of deionized water into a stirrer for rapid emulsification of 10 min, taking out the solution in the first step, adding the solution into the stirrer, adding 0.6 part of potassium persulfate, 0.3 part of emulsifier OP-10 and 8 parts of ethyl acrylate, uniformly mixing, heating to 60 ℃, keeping the temperature for emulsification reaction for 2h, continuing to heat to 82 ℃ for curing of 30min, stopping heating, naturally cooling to room temperature, and filtering for later use; the stirring speed during emulsification is 1000 r/min;
and thirdly, uniformly mixing the solution prepared in the second step and the rest components in the formula, then adding the mixture into an extruder for extrusion, adding the extruded material into a ball mill for grinding, and sieving to obtain the nano composite coating with the particle size of 45nm.
Example 4
The nano composite coating for the packaging material comprises the following raw materials in parts by weight: 60 parts of epoxy resin, 25 parts of ethyl acrylate, 12 parts of nano titanium dioxide, 11 parts of plant nano cellulose, 3 parts of antifouling additive monomer, 3 parts of sodium stearate, 1 part of emulsifier OP-10, 1 part of initiator, 1 part of carboxymethyl cellulose and 50 parts of deionized water.
The preparation method of the paint used for the nano composite coating comprises the following steps:
firstly, mixing and uniformly stirring 11 parts of plant nanocellulose and 20 parts of deionized water, then adding 3 parts of antifouling additive monomer, stirring for 15min, and then placing into an ultrasonic water bath kettle for ultrasonic treatment for 2h, wherein the ultrasonic frequency is 40Hz, and the water bath temperature is 50 ℃;
secondly, adding 1 part of sodium stearate, 0.5 part of emulsifier OP-10, 15 parts of ethyl acrylate and 15 parts of deionized water into a stirrer for rapid emulsification of 15min, taking out the solution in the first step, adding the solution into the stirrer, adding 1 part of potassium persulfate, 0.5 part of emulsifier OP-10 and 10 parts of ethyl acrylate, uniformly mixing, heating to 65 ℃, preserving heat for emulsification reaction for 2h, continuously heating to 80 ℃ for curing for 20 min, stopping heating, naturally cooling to room temperature, and filtering for later use; the stirring speed during emulsification is 1000 r/min;
and thirdly, uniformly mixing the solution prepared in the second step and the rest components in the formula, then adding the mixture into an extruder for extrusion, adding the extruded material into a ball mill for grinding, and sieving to obtain the nano composite coating with the particle size of 31nm.
Example 5
The nano composite coating for the packaging material comprises the following raw materials in parts by weight: 55 parts of epoxy resin, 22 parts of ethyl acrylate, 12 parts of nano titanium dioxide, 14 parts of plant nano cellulose, 5 parts of antifouling additive monomer, 2 parts of sodium stearate, 0.8 part of emulsifier OP-10, 0.8 part of initiator, 2 parts of carboxymethyl cellulose and 48 parts of deionized water.
The preparation method of the paint used for the nano composite coating comprises the following steps:
firstly, mixing 14 parts of plant nanocellulose with 20 parts of deionized water, uniformly stirring, adding 5 parts of antifouling additive monomer, stirring for 12 min, and then placing into an ultrasonic water bath kettle for ultrasonic treatment for 3h, wherein the ultrasonic frequency is 40Hz, and the water bath temperature is 50 ℃;
secondly, adding 1 part of sodium stearate, 0.4 part of emulsifier OP-10, 12 parts of ethyl acrylate and 15 parts of deionized water into a stirrer for rapid emulsification of 12 min, taking out the solution in the first step, adding the solution into the stirrer, adding 0.8 part of potassium persulfate, 0.4 part of emulsifier OP-10 and 10 parts of ethyl acrylate, uniformly mixing, heating to 60 ℃, keeping the temperature for emulsification reaction for 2h, continuing to heat to 85 ℃ for curing of 20 min, stopping heating, naturally cooling to room temperature, and filtering for later use; the stirring speed during emulsification is 800 r/min;
and thirdly, uniformly mixing the solution prepared in the second step and the rest components in the formula, then adding the mixture into an extruder for extrusion, adding the extruded material into a ball mill for grinding, and sieving to obtain the nano composite coating with the particle size of 37nm.
Comparative example 1
The nano composite coating for the packaging material comprises the following raw materials in parts by weight: 55 parts of epoxy resin, 22 parts of ethyl acrylate, 12 parts of nano titanium dioxide, 14 parts of kaolin, 5 parts of antifouling additive monomer, 2 parts of sodium stearate, 0.8 part of emulsifier OP-10, 0.8 part of initiator, 2 parts of carboxymethyl cellulose and 48 parts of deionized water.
The preparation method of the paint used for the nano composite coating comprises the following steps:
firstly, mixing 14 parts of kaolin and 20 parts of deionized water, uniformly stirring, adding 5 parts of antifouling additive monomer, stirring for 12 min, and then placing into an ultrasonic water bath kettle for ultrasonic treatment for 3h, wherein the ultrasonic frequency is 40Hz, and the water bath temperature is 50 ℃;
secondly, adding 1 part of sodium stearate, 0.4 part of emulsifier OP-10, 12 parts of ethyl acrylate and 15 parts of deionized water into a stirrer for rapid emulsification of 12 min, taking out the solution in the first step, adding the solution into the stirrer, adding 0.8 part of potassium persulfate, 0.4 part of emulsifier OP-10 and 10 parts of ethyl acrylate, uniformly mixing, heating to 60 ℃, keeping the temperature for emulsification reaction for 2h, continuing to heat to 85 ℃ for curing of 20 min, stopping heating, naturally cooling to room temperature, and filtering for later use; the stirring speed during emulsification is 800 r/min;
and thirdly, uniformly mixing the solution prepared in the second step and the rest components in the formula, then adding the mixture into an extruder for extrusion, adding the extruded material into a ball mill for grinding, and sieving to obtain the nano composite coating with the particle size of 44nm.
Comparative example 2
The nano composite coating for the packaging material comprises the following raw materials in parts by weight: 55 parts of epoxy resin, 22 parts of ethyl acrylate, 12 parts of nano titanium dioxide, 14 parts of plant nano cellulose, 2 parts of sodium stearate, 0.8 part of emulsifier OP-10, 0.8 part of initiator, 2 parts of carboxymethyl cellulose and 48 parts of deionized water.
The preparation method of the paint used for the nano composite coating comprises the following steps:
firstly, mixing 14 parts of plant nanocellulose with 20 parts of deionized water, uniformly stirring, placing into an ultrasonic water bath kettle for ultrasonic treatment for 3 hours after stirring for 12 min, wherein the ultrasonic frequency is 40Hz, and the water bath temperature is 50 ℃;
secondly, adding 1 part of sodium stearate, 0.4 part of emulsifier OP-10, 12 parts of ethyl acrylate and 15 parts of deionized water into a stirrer for rapid emulsification of 12 min, then adding 0.8 part of potassium persulfate, 0.4 part of emulsifier OP-10 and 10 parts of ethyl acrylate, uniformly mixing, heating to 60 ℃, preserving heat for emulsification reaction for 2h, continuously heating to 85 ℃ for curing for 20 min, stopping heating, naturally cooling to room temperature, and filtering for later use; the stirring speed during emulsification is 800 r/min;
and thirdly, uniformly mixing the solution prepared in the second step and the rest components in the formula, then adding the mixture into an extruder for extrusion, adding the extruded material into a ball mill for grinding, and sieving to obtain the nano composite coating with the particle size of 35nm.
The nanocomposite coatings prepared in examples 3 to 5 and comparative examples 1 to 2 were respectively sprayed on clean stainless steel plates by electrostatic spraying, baked at 180℃for 5 minutes with a film thickness of 100. Mu.m, and the performance test on the coating films were respectively carried out, with the results shown below:
annotation: determination of surface resistivity of a Material sample Using a surface resistivity tester (surfaceResistivity of less than 10 10 Omega has obvious antistatic effect, and the smaller the surface resistivity is, the better the antistatic effect is).
As can be seen from the above table, the coating prepared in examples 3-5 has good waterproof performance, film appearance, adhesion, antibacterial performance and antistatic antifouling performance, and the comparative example 1 uses kaolin instead of plant cellulose, but has good antibacterial performance, but the antibacterial performance is reduced, probably because the quaternary ammonium salt in the antifouling additive monomer plays a certain antibacterial role at the same time, so that the antibacterial performance is reduced without adding the antifouling additive monomer in comparative example 2, and the antifouling additive monomer has no waterproof performance and antistatic antifouling performance, probably because-CF 3 in the antifouling additive monomer has lower surface energy, can stretch into the air after film formation, occupies the interface between the air and the coating polymer, and further improves the hydrophobic performance of the coating.
The foregoing is merely illustrative and explanatory of the principles of the invention, as various modifications and additions may be made to the specific embodiments described, or similar thereto, by those skilled in the art, without departing from the principles of the invention or beyond the scope of the appended claims.

Claims (7)

1. The nano composite coating for the packaging material is obtained by coating a nano composite coating, and is characterized by comprising the following raw materials in parts by weight: 40-60 parts of epoxy resin, 15-25 parts of ethyl acrylate, 12-15 parts of nano titanium dioxide, 10-15 parts of plant nano cellulose, 3-5 parts of antifouling auxiliary monomer, 1-3 parts of sodium stearate, 0.5-1 part of emulsifier OP-10,0.5-1 part of initiator potassium persulfate, 1-3 parts of carboxymethyl cellulose and 40-50 parts of deionized water;
the preparation method of the antifouling auxiliary monomer comprises the following steps:
13-15g of ethyl 2- (dimethylamino) acrylate and 400-500ml of solvent anhydrous acetonitrile are added into a flask provided with a thermometer, a reflux condenser and nitrogen, nitrogen is introduced, the mixture is heated to 45-50 ℃ while stirring, 14.5-16g of 1-chloro-3, 3-trifluoropropane and 40-50ml of potassium iodide acetonitrile solution with the mass concentration of 15-18% are added, after the dropwise addition is finished, the temperature is continuously raised to 75-80 ℃, the temperature is kept for reaction for 8-12h, the solvent is distilled off under reduced pressure, the mixture is washed and separated by adopting an ethanol aqueous solution with the mass fraction of 10-15%, and the solution is distilled under reduced pressure by adopting a rotary evaporator, so that the antifouling auxiliary monomer is obtained.
2. The nanocomposite coating for packaging material according to claim 1, wherein the plant nanocellulose is prepared by the following steps:
adding ramie fibers into a pulverizer for pulverizing, adding into a stirrer after pulverizing, adding deionized water, stirring at a rotating speed of 400-600r/min, adding sodium acetate solution with a mass concentration of 20-30% while stirring, continuously stirring at room temperature for 20-30min after the addition, adding sodium hydroxide aqueous solution with a mass concentration of 15-20%, heating to 80-90 ℃, preserving heat and stirring for 4-6h, naturally cooling to room temperature, filtering, washing with deionized water to neutrality, drying, and adding into a grinder for grinding and sieving to obtain plant nanocellulose with a diameter of 15-60 nm.
3. The nanocomposite coating for packaging material according to claim 2, wherein the mass ratio of ramie fibers to deionized water is 1:1-1.5;
the mass ratio of the ramie fibers to the sodium acetate solution is 20-25:1;
the mass ratio of the ramie fibers to the sodium hydroxide aqueous solution is 10:4-5.
4. The nanocomposite coating for packaging material according to claim 1, wherein the nanocomposite coating is prepared by:
firstly, mixing 10-15 parts of plant nanocellulose with 20 parts of deionized water, uniformly stirring, adding 3-5 parts of antifouling additive monomer, stirring for 10-15min, and then placing into an ultrasonic water bath kettle for ultrasonic treatment for 2-3h;
secondly, adding 0.5-1 part of sodium stearate, 0.2-0.5 part of emulsifier OP-10, 10-15 parts of ethyl acrylate and 10-15 parts of deionized water into a stirrer, rapidly emulsifying for 10-15min, taking out the solution in the first step, adding the solution into the stirrer, adding 0.5-1 part of potassium persulfate, 0.3-0.5 part of emulsifier OP-10 and 5-10 parts of ethyl acrylate, uniformly mixing, heating to 55-65 ℃, preserving heat for emulsification for 2-3h, continuously heating to 80-85 ℃ for curing for 20-30min, stopping heating, naturally cooling to room temperature, and filtering for later use;
and thirdly, uniformly mixing the solution prepared in the second step and the rest components in the formula, then adding the mixture into an extruder for extrusion, adding the extruded material into a ball mill for grinding, and sieving to obtain the nano composite coating.
5. The nanocomposite coating for packaging material according to claim 4, wherein in the first step, the ultrasonic frequency is 30-45Hz, and the water bath temperature is 45-55 ℃.
6. The nanocomposite coating for packaging material according to claim 4, wherein in the second step, the stirring speed during emulsification is 800-1000r/min.
7. A nanocomposite coating for packaging material according to claim 4, wherein in the third step the nanocomposite coating has a particle size of 10-50nm.
CN202310045349.6A 2023-01-30 2023-01-30 Nano composite coating for packaging material Active CN116063899B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104327663A (en) * 2014-11-24 2015-02-04 山东交通学院 Antifouling and antibacterial coating paint and applications thereof
CN105061606A (en) * 2015-09-01 2015-11-18 东华大学 Method for preparing adsorbable oxycellulose through ramie oxidation degumming process
CN109943169A (en) * 2019-03-20 2019-06-28 常州大学 A kind of Nano-composite marine anticorrosive paint and preparation method thereof
CN113462250A (en) * 2021-07-24 2021-10-01 江西昊泽光学膜科技有限公司 Antibacterial and sanitary mobile phone film and preparation method thereof
CN115433498A (en) * 2022-09-09 2022-12-06 江西龙正科技发展有限公司 Preparation method and application of waterproof antibacterial acrylic resin wood lacquer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104327663A (en) * 2014-11-24 2015-02-04 山东交通学院 Antifouling and antibacterial coating paint and applications thereof
CN105061606A (en) * 2015-09-01 2015-11-18 东华大学 Method for preparing adsorbable oxycellulose through ramie oxidation degumming process
CN109943169A (en) * 2019-03-20 2019-06-28 常州大学 A kind of Nano-composite marine anticorrosive paint and preparation method thereof
CN113462250A (en) * 2021-07-24 2021-10-01 江西昊泽光学膜科技有限公司 Antibacterial and sanitary mobile phone film and preparation method thereof
CN115433498A (en) * 2022-09-09 2022-12-06 江西龙正科技发展有限公司 Preparation method and application of waterproof antibacterial acrylic resin wood lacquer

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