Environmentally friendly high-gloss water-based ink and preparation method thereof

Abstract

The present invention belongs to the field of printing coating technology and specifically provides an environmentally friendly, high-gloss water-based ink and a preparation method thereof. The water-based ink comprises the following components by weight: 40-50 parts of a water-based acrylic resin, 5-10 parts of a fluorinated polyurethane resin, 2-4 parts of an environmentally friendly surfactant, 2-5 parts of a pigment, 2-4 parts of an antioxidant, 4-6 parts of biomass graphene, 0.5-1 part of a silicon quantum dot solution, 2-4 parts of sodium alginate, 4-6 parts of triethylamine, and 30-40 parts of distilled water. The present invention utilizes biomass waste to prepare graphene materials, which are combined with silicon quantum dots to enhance the gloss of the water-based ink. Furthermore, environmentally friendly sodium alginate is used as a thickener to precisely control the viscosity of the water-based ink. The synthetic raw materials do not contain harmful ingredients. This innovative technology injects new impetus into environmentally friendly printing and sustainable development.

Description

Technical Field

[0001] The present invention relates to the technical field of printing coatings, and in particular to an environmentally friendly high-gloss water-based ink and a preparation method thereof. Background Art

[0002] As society's environmental and health standards continue to rise, the printing industry faces increasingly stringent requirements when selecting ink materials. While traditional solvent-based inks have achieved some success in terms of printing results, their pungent odor and potential health risks have drawn widespread attention. Water-based inks, which use water as a solvent and do not contain toxic, volatile organic solvents, reduce air pollution while also posing a lower health risk to printing workers, providing a safer working environment and offering a viable alternative to traditional solvent-based inks.

[0003] However, the performance of current water-based inks in the market still faces challenges. High-quality printing requires both environmental friendliness and high gloss, especially in the food packaging sector, which attracts consumer attention. Therefore, the development of water-based inks that offer both excellent environmental performance and exceptional high gloss properties is crucial. This is crucial not only to meet print quality requirements but also to promote the entire printing industry towards a more environmentally friendly and sustainable development. Summary of the Invention

[0004] In response to the above situation, in order to overcome the defects of the existing technology, the present invention provides an environmentally friendly and high-gloss water-based ink and a preparation method thereof. Graphene materials are prepared from biomass waste and combined with silicon quantum dots to improve the gloss of the water-based ink. Environmentally friendly sodium alginate is used as a thickener to adjust the viscosity of the water-based ink. The synthetic raw materials do not contain harmful ingredients, which promotes the development of the printing industry in a more sustainable direction.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: The present invention proposes an environmentally friendly and high-gloss water-based ink, which includes the following components in parts by weight: 40-50 parts of water-based acrylic resin, 5-10 parts of fluorinated polyurethane resin, 2-4 parts of environmentally friendly surfactant, 2-5 parts of pigment, 2-4 parts of antioxidant, 4-6 parts of biomass graphene, 0.5-1 part of silicon quantum dot solution, 2-4 parts of sodium alginate, 4-6 parts of triethylamine, and 30-40 parts of distilled water.

[0006] Preferably, the environmentally friendly surfactant is any one of cocamidopropyl betaine, plant-based surfactants, palm oil-based surfactants, octanol polyoxyethylene ether, bioalcohol polyoxyethylene ether, and fatty alcohol polyoxyethylene ether.

[0007] Preferably, the pigment is one or more of phthalocyanine blue, phthalocyanine green, alizarin red, methylene blue, and bismuth nitride yellow.

[0008] Preferably, the antioxidant is one or more of diphenylphenol, p-xylenediamine, and tributylhydroxybenzophenone.

[0009] Preferably, the method for preparing biomass graphene comprises the following steps:

[0010] S1. Biomass waste pretreatment: The biomass waste is placed in an oven and carbonized at 260°C for 30-50 minutes, and then ground into fine particles to obtain charred biochar;

[0011] S2. Weigh 5 g of the charred biochar prepared in step S1 and disperse it in 100 mL of 98 wt% H2SO4. Slowly add 12-16 g of KMnO4 and continue stirring at 10-15°C for 30 min. Then transfer to a 35-40°C water bath and stir for 3 h to obtain a green-black mixture.

[0012] S3. Slowly mix the green-black mixture prepared in step S2 with 100 mL of distilled water, maintaining the temperature at 95° C. for 15 to 20 minutes to obtain a brown mixture;

[0013] S4. Add 100 mL of deionized water to the brown mixture prepared in step S3, and then slowly add 40-50 mL of 30 wt% H2O2 solution until the color of the solution changes to light yellow. Filter to obtain a sample, wash the sample several times with distilled water, and ultrasonically peel it in an ultrasonic bath for 30 minutes. Place it in an oven and dry it at 80°C for 12 hours to obtain biomass graphene.

[0014] Preferably, the biomass waste in step S1 is any one of corn straw, sugarcane bagasse, and rice husk, and the particle size of the fine particles is 10±2 μm.

[0015] Preferably, the method for preparing the silicon quantum dot solution comprises the following steps:

[0016] (1) Add 20 mL of distilled water to a beaker, heat to 40°C and maintain for 15 minutes, add 4 to 6 mL of 3-aminopropyltriethoxysilane, and stir for 10 to 20 minutes to obtain a silicon solution;

[0017] (2) Add 6-8 mL of 0.1 mol / L ascorbic acid solution to the silicon solution prepared in step (1), stir at 400 rpm for 20 min, cool to room temperature and let stand for 24 h to obtain a silicon quantum dot solution.

[0018] The present invention also provides a method for preparing an environmentally friendly high-gloss water-based ink, comprising the following steps:

[0019] i. Add water-based acrylic resin, fluorinated polyurethane resin, environmentally friendly surfactant and distilled water to the reactor in parts by mass, stir at a speed of 300 to 400 rpm for 40 to 60 min and mix well;

[0020] ii. Add biomass graphene, silicon quantum dot solution, sodium alginate, and triethylamine to the reactor in step i., continue stirring at a speed of 300 to 400 rpm for 60 to 80 min, and mix evenly to obtain a water-based ink.

[0021] Preferably, the reactor is a Qiwei JB60-SH digital display electric mixer equipped with a 20L ink barrel.

[0022] The beneficial effects achieved by the present invention are as follows:

[0023] The present invention proposes an environmentally friendly high-gloss water-based ink and a preparation method thereof, which meet the dual needs of the printing industry for environmental protection and high gloss. The use of biomass waste to prepare synthetic biomass graphene helps to reduce dependence on natural resources and promote the printing industry to develop in a more sustainable direction; silicon quantum dots have a certain gloss and fluorescence effect, which, together with biomass graphene, can effectively improve the gloss of water-based ink, which is crucial for creating attractive high-gloss effects on printed products, especially in the field of food packaging. The use of environmentally friendly sodium alginate as a thickener can not only adjust the viscosity of the water-based ink, but also avoid the environmental and health problems that may be caused by some traditional thickeners. In addition, the various raw materials in the formula of the water-based ink proposed by the present invention do not contain harmful ingredients, which helps to reduce the health risks to printing practitioners and provide a safer working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a scanning electron microscope image of the biomass graphene prepared in Example 1 of the present invention;

[0026] Figure 2 This is a transmission electron microscope image of the silicon quantum dot solution prepared in Example 1 of the present invention. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those familiar to those skilled in the art. Furthermore, any methods and materials similar or equivalent to those described herein can be applied to the present invention. The preferred embodiments and materials described herein are for illustrative purposes only and are not intended to limit the scope of this application.

[0029] The experimental methods in the following examples are conventional methods unless otherwise specified; the experimental materials used in the following examples and comparative examples are purchased from commercial channels unless otherwise specified.

[0030] Example 1: This example proposes an environmentally friendly high-gloss water-based ink, which includes the following components in parts by weight: 40 parts of water-based acrylic resin, 5 parts of fluorinated polyurethane resin, 2 parts of cocamidopropyl betaine, 2 parts of phthalocyanine blue, 2 parts of diphenylphenol, 4 parts of biomass graphene, 0.5 parts of silicon quantum dot solution, 2 parts of sodium alginate, 4 parts of triethylamine, and 30 parts of distilled water.

[0031] The method for preparing biomass graphene comprises the following steps:

[0032] S1. Biomass waste pretreatment: The corn stalks were placed in an oven and carbonized at 260°C for 30-50 min, and then ground into fine particles with a particle size of 10±2 μm to obtain charred biochar;

[0033] S2. Weigh 5 g of the charred biochar prepared in step S1 and disperse it in 100 mL of 98 wt% H2SO4. Slowly add 12 g of KMnO4 and continue stirring at 10°C for 30 min. Then transfer to a 35°C water bath and stir for 3 h to obtain a green-black mixture.

[0034] S3. Slowly mix the green-black mixture prepared in step S2 with 100 mL of distilled water, maintaining the temperature at 95° C. for 15 min to obtain a brown mixture;

[0035] S4. Add 100 mL of deionized water to the brown mixture prepared in step S3, and then slowly add 40 mL of 30 wt% H2O2 solution until the color of the solution changes to light yellow. Filter to obtain a sample, wash the sample several times with distilled water, and ultrasonically peel it in an ultrasonic bath for 30 minutes. Place it in an oven and dry it at 80°C for 12 hours to obtain biomass graphene.

[0036] The method for preparing the silicon quantum dot solution comprises the following steps:

[0037] (1) Add 20 mL of distilled water to a beaker, heat to 40°C and maintain for 15 minutes, add 4 mL of 3-aminopropyltriethoxysilane, and stir for 10 minutes to obtain a silicon solution;

[0038] (2) Add 6 mL of 0.1 mol / L ascorbic acid solution to the silicon solution prepared in step (1), stir at 400 rpm for 20 min, cool to room temperature and let stand for 24 h to obtain a silicon quantum dot solution.

[0039] This embodiment also provides a method for preparing an environmentally friendly high-gloss water-based ink, comprising the following steps:

[0040] i. The aqueous acrylic resin, fluorinated polyurethane resin, environmentally friendly surfactant and distilled water were added to the reactor in parts by mass and stirred at a speed of 300 rpm for 40 min to mix well;

[0041] ii. Add biomass graphene, silicon quantum dot solution, sodium alginate, and triethylamine to the reactor in step i., continue stirring at a speed of 300 rpm for 60 min, and mix well to obtain a water-based ink.

[0042] The reactor is a Qiwei JB60-SH digital display electric mixer equipped with a 20L ink barrel.

[0043] Example 2: This example proposes an environmentally friendly high-gloss water-based ink, which includes the following components in parts by weight: 50 parts of water-based acrylic resin, 10 parts of fluorinated polyurethane resin, 4 parts of palm oil-based surfactant, 5 parts of alizarin red, 4 parts of p-xylenediamine, 6 parts of biomass graphene, 1 part of silicon quantum dot solution, 4 parts of sodium alginate, 6 parts of triethylamine, and 40 parts of distilled water.

[0044] The method for preparing biomass graphene comprises the following steps:

[0045] S1. Biomass waste pretreatment: sugarcane bagasse was placed in an oven and carbonized at 260°C for 50 min, and then ground into fine particles with a particle size of 10±2 μm to obtain charred biochar;

[0046] S2. Weigh 5 g of the charred biochar prepared in step S1 and disperse it in 100 mL of 98 wt% H2SO4. Slowly add 16 g of KMnO4 and continue stirring at 15°C for 30 min. Then transfer to a 40°C water bath and stir for 3 h to obtain a green-black mixture.

[0047] S3. Slowly mix the green-black mixture prepared in step S2 with 100 mL of distilled water, maintaining the temperature at 95° C. for 20 min to obtain a brown mixture;

[0048] S4. Add 100 mL of deionized water to the brown mixture prepared in step S3, and then slowly add 50 mL of 30 wt% H2O2 solution until the color of the solution changes to light yellow. Filter to obtain a sample, wash the sample several times with distilled water, and ultrasonically peel it in an ultrasonic bath for 30 minutes. Place it in an oven and dry it at 80°C for 12 hours to obtain biomass graphene.

[0049] The method for preparing the silicon quantum dot solution comprises the following steps:

[0050] (1) Add 20 mL of distilled water to a beaker, heat to 40°C and maintain for 15 minutes, add 6 mL of 3-aminopropyltriethoxysilane, and stir for 20 minutes to obtain a silicon solution;

[0051] (2) Add 8 mL of 0.1 mol / L ascorbic acid solution to the silicon solution prepared in step (1), stir at 400 rpm for 20 min, cool to room temperature and let stand for 24 h to obtain a silicon quantum dot solution.

[0052] This embodiment also provides a method for preparing an environmentally friendly high-gloss water-based ink, comprising the following steps:

[0053] i. The aqueous acrylic resin, fluorinated polyurethane resin, environmentally friendly surfactant and distilled water were added to the reactor in parts by mass and stirred at a speed of 400 rpm for 60 min to mix well;

[0054] ii. Add biomass graphene, silicon quantum dot solution, sodium alginate, and triethylamine to the reactor in step i., continue stirring at a speed of 400 rpm for 80 min, and mix well to obtain a water-based ink.

[0055] The reactor is a Qiwei JB60-SH digital display electric mixer equipped with a 20L ink barrel.

[0056] Example 3: This example proposes an environmentally friendly and high-gloss water-based ink, which includes the following components in parts by weight: 45 parts of water-based acrylic resin, 7 parts of fluorinated polyurethane resin, 3 parts of octanol polyoxyethylene ether, 4 parts of methylene blue, 3 parts of tributyl hydroxybenzophenone, 5 parts of biomass graphene, 0.8 parts of silicon quantum dot solution, 3 parts of sodium alginate, 5 parts of triethylamine, and 35 parts of distilled water.

[0057] The method for preparing biomass graphene comprises the following steps:

[0058] S1. Biomass waste pretreatment: The rice husk was placed in an oven and carbonized at 260°C for 40 min, and then ground into fine particles with a particle size of 10±2 μm to obtain charred biochar;

[0059] S2. Weigh 5 g of the charred biochar prepared in step S1 and disperse it in 100 mL of 98 wt% H2SO4. Slowly add 14 g of KMnO4 and continue stirring at 13°C for 30 min. Then transfer to a 38°C water bath and stir for 3 h to obtain a green-black mixture.

[0060] S3. Slowly mix the green-black mixture prepared in step S2 with 100 mL of distilled water, maintaining the temperature at 95° C. for 17 min to obtain a brown mixture;

[0061] S4. Add 100 mL of deionized water to the brown mixture prepared in step S3, and then slowly add 45 mL of 30 wt% H2O2 solution until the color of the solution changes to light yellow. Filter to obtain a sample, wash the sample several times with distilled water, and ultrasonically peel it in an ultrasonic bath for 30 min. Place it in an oven and dry it at 80°C for 12 h to obtain biomass graphene.

[0062] The method for preparing the silicon quantum dot solution comprises the following steps:

[0063] (1) Add 20 mL of distilled water to a beaker, heat to 40 °C and maintain for 15 min, add 5 mL of 3-aminopropyltriethoxysilane, and stir for 15 min to obtain a silicon solution;

[0064] (2) Add 7 mL of 0.1 mol / L ascorbic acid solution to the silicon solution prepared in step (1), stir at 400 rpm for 20 min, cool to room temperature and let stand for 24 h to obtain a silicon quantum dot solution.

[0065] This embodiment also provides a method for preparing an environmentally friendly high-gloss water-based ink, comprising the following steps:

[0066] i. The aqueous acrylic resin, fluorinated polyurethane resin, environmentally friendly surfactant and distilled water were added to the reactor in parts by mass and stirred at a speed of 350 rpm for 50 min to mix well;

[0067] ii. Continue to add biomass graphene, silicon quantum dot solution, sodium alginate, and triethylamine into the reactor described in step i., continue to stir at a speed of 350 rpm for 70 min, and mix evenly to obtain a water-based ink.

[0068] The reactor is a Qiwei JB60-SH digital display electric mixer equipped with a 20L ink barrel.

[0069] Comparative Example 1: This comparative example proposes an environmentally friendly and high-gloss water-based ink, which differs from Example 1 only in that biomass graphene is not added. The other components, component contents, and experimental steps are the same as those in Example 1. The water-based ink comprises the following components in parts by weight: 40 parts of water-based acrylic resin, 5 parts of fluorinated polyurethane resin, 2 parts of cocamidopropyl betaine, 2 parts of phthalocyanine blue, 2 parts of diphenylphenol, 0.5 parts of silicon quantum dot solution, 2 parts of sodium alginate, 4 parts of triethylamine, and 30 parts of distilled water.

[0070] The method for preparing the silicon quantum dot solution comprises the following steps:

[0071] (1) Add 20 mL of distilled water to a beaker, heat to 40°C and maintain for 15 minutes, add 4 mL of 3-aminopropyltriethoxysilane, and stir for 10 minutes to obtain a silicon solution;

[0072] (2) Add 6 mL of 0.1 mol / L ascorbic acid solution to the silicon solution prepared in step (1), stir at 400 rpm for 20 min, cool to room temperature and let stand for 24 h to obtain a silicon quantum dot solution.

[0073] This comparative example also proposes a method for preparing an environmentally friendly high-gloss water-based ink, comprising the following steps:

[0074] i. The aqueous acrylic resin, fluorinated polyurethane resin, environmentally friendly surfactant and distilled water were added to the reactor in parts by mass and stirred at a speed of 300 rpm for 40 min to mix well;

[0075] ii. Add the silicon quantum dot solution, sodium alginate, and triethylamine to the reactor in step i., continue stirring at a speed of 300 rpm for 60 min, and mix well to obtain a water-based ink.

[0076] The reactor is a Qiwei JB60-SH digital display electric mixer equipped with a 20L ink barrel.

[0077] Comparative Example 2: This comparative example proposes an environmentally friendly and high-gloss water-based ink, which differs from Example 1 only in that no silicon quantum dot solution is added. The remaining components, component contents, and experimental steps are the same as those in Example 1. The water-based ink comprises the following components in parts by weight: 40 parts of water-based acrylic resin, 5 parts of fluorinated polyurethane resin, 2 parts of cocamidopropyl betaine, 2 parts of phthalocyanine blue, 2 parts of diphenylphenol, 4 parts of biomass graphene, 2 parts of sodium alginate, 4 parts of triethylamine, and 30 parts of distilled water.

[0078] The method for preparing biomass graphene comprises the following steps:

[0079] S1. Biomass waste pretreatment: The corn stalks were placed in an oven and carbonized at 260°C for 30-50 min, and then ground into fine particles with a particle size of 10±2 μm to obtain charred biochar;

[0080] S2. Weigh 5 g of the charred biochar prepared in step S1 and disperse it in 100 mL of 98 wt% H2SO4. Slowly add 12 g of KMnO4 and continue stirring at 10°C for 30 min. Then transfer to a 35°C water bath and stir for 3 h to obtain a green-black mixture.

[0081] S3. Slowly mix the green-black mixture prepared in step S2 with 100 mL of distilled water, maintaining the temperature at 95° C. for 15 min to obtain a brown mixture;

[0082] S4. Add 100 mL of deionized water to the brown mixture prepared in step S3, and then slowly add 40 mL of 30 wt% H2O2 solution until the color of the solution changes to light yellow. Filter to obtain a sample, wash the sample several times with distilled water, and ultrasonically peel it in an ultrasonic bath for 30 minutes. Place it in an oven and dry it at 80°C for 12 hours to obtain biomass graphene.

[0083] This comparative example also proposes a method for preparing an environmentally friendly high-gloss water-based ink, comprising the following steps:

[0084] i. The aqueous acrylic resin, fluorinated polyurethane resin, environmentally friendly surfactant and distilled water were added to the reactor in parts by mass and stirred at a speed of 300 rpm for 40 min to mix well;

[0085] ii. Biomass graphene, sodium alginate, and triethylamine were added to the reactor in step i. and stirred at 300 rpm for 60 min to obtain a water-based ink.

[0086] The reactor is a Qiwei JB60-SH digital display electric mixer equipped with a 20L ink barrel.

[0087] Comparative Example 3: This comparative example proposes an environmentally friendly and high-gloss water-based ink, which differs from Example 1 only in that sodium alginate is not added. The other components, component contents, and experimental steps are the same as those in Example 1. The water-based ink comprises the following components in parts by weight: 40 parts of water-based acrylic resin, 5 parts of fluorinated polyurethane resin, 2 parts of cocamidopropyl betaine, 2 parts of phthalocyanine blue, 2 parts of diphenylphenol, 4 parts of biomass graphene, 0.5 parts of silicon quantum dot solution, 4 parts of triethylamine, and 30 parts of distilled water.

[0088] The method for preparing biomass graphene comprises the following steps:

[0089] S1. Biomass waste pretreatment: The corn stalks were placed in an oven and carbonized at 260°C for 30-50 min, and then ground into fine particles with a particle size of 10±2 μm to obtain charred biochar;

[0090] S2. Weigh 5 g of the charred biochar prepared in step S1 and disperse it in 100 mL of 98 wt% H2SO4. Slowly add 12 g of KMnO4 and continue stirring at 10°C for 30 min. Then transfer to a 35°C water bath and stir for 3 h to obtain a green-black mixture.

[0091] S3. Slowly mix the green-black mixture prepared in step S2 with 100 mL of distilled water, maintaining the temperature at 95° C. for 15 min to obtain a brown mixture;

[0092] S4. Add 100 mL of deionized water to the brown mixture prepared in step S3, and then slowly add 40 mL of 30 wt% H2O2 solution until the color of the solution changes to light yellow. Filter to obtain a sample, wash the sample several times with distilled water, and ultrasonically peel it in an ultrasonic bath for 30 minutes. Place it in an oven and dry it at 80°C for 12 hours to obtain biomass graphene.

[0093] The method for preparing the silicon quantum dot solution comprises the following steps:

[0094] (1) Add 20 mL of distilled water to a beaker, heat to 40°C and maintain for 15 minutes, add 4 mL of 3-aminopropyltriethoxysilane, and stir for 10 minutes to obtain a silicon solution;

[0095] (2) Add 6 mL of 0.1 mol / L ascorbic acid solution to the silicon solution prepared in step (1), stir at 400 rpm for 20 min, cool to room temperature and let stand for 24 h to obtain a silicon quantum dot solution.

[0096] This comparative example also proposes a method for preparing an environmentally friendly high-gloss water-based ink, comprising the following steps:

[0097] i. The aqueous acrylic resin, fluorinated polyurethane resin, environmentally friendly surfactant and distilled water were added to the reactor in parts by mass and stirred at a speed of 300 rpm for 40 min to mix well;

[0098] ii. Add biomass graphene, silicon quantum dot solution, and triethylamine to the reactor in step i., continue stirring at a speed of 300 rpm for 60 min, and mix well to obtain a water-based ink.

[0099] The reactor is a Qiwei JB60-SH digital display electric mixer equipped with a 20L ink barrel.

[0100] Experimental Example 1: The morphology of the biomass graphene prepared in Example 1 was analyzed using a scanning electron microscope, and the morphology of the silicon quantum dots prepared in Example 1 was analyzed using a transmission electron microscope.

[0101] Figure 1 This is a scanning electron microscope image of the biomass graphene prepared in Example 1 of the present invention. As shown in the figure, the biomass graphene has a clear layered structure, indicating that the biomass graphene was successfully prepared; Figure 2 This is a transmission electron microscope image of the silicon quantum dot solution prepared in Example 1 of the present invention. As shown in the figure, the silicon quantum dots are evenly distributed and have a nano-spherical structure with a particle size of about 4 nm, indicating that the silicon quantum dot solution was successfully prepared.

[0102] Experimental Example 2: The tinting strength, viscosity, fineness, adhesion fastness, and glossiness of the water-based inks prepared in Examples 1-3 and Comparative Examples 1-3 were tested respectively;

[0103] Tinting strength, viscosity, fineness and adhesion fastness are tested according to the standard QB / T2024-94 "Gravure Plastic Film Composite Ink";

[0104] Glossiness is tested according to the standard GT / T 13217.2-2009 “Liquid Ink Gloss Test Method”.

[0105] Table 1 Test data

[0106]

[0107] As shown in Table 1, the water-based inks prepared in Examples 1-3 all exhibit excellent properties, including tinting strength, viscosity, fineness, adhesion, and gloss. The water-based ink prepared in Comparative Example 1 exhibited relatively low tinting strength and adhesion, suggesting that the layered structure of biomass graphene contributes to these improvements. The viscosity and fineness of the water-based inks prepared in Example 1 and Comparative Examples 1-2 were similar, but the gloss of the water-based inks prepared in Comparative Examples 1-2 was relatively low. This is due to the gloss and fluorescence of silicon quantum dots, which, in conjunction with biomass graphene, effectively enhance the gloss of the water-based ink. The viscosity of the water-based ink prepared in Comparative Example 3 was lower than that in Example 1, owing to the fact that sodium alginate acts as a thickener, effectively adjusting the viscosity of the water-based ink and its environmental compatibility. These tests demonstrate the excellent performance of the environmentally friendly, high-gloss water-based ink proposed in this invention.

[0108] The present invention and its embodiments are described above. Such description is not restrictive. The drawings show only one embodiment of the present invention, and actual applications are not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, any method and embodiment similar to the technical solution without creative design shall fall within the scope of protection of the present invention.

Claims

1. An environmentally friendly high-gloss water-based ink, characterized in that: The water-based ink comprises the following components in parts by weight: 40-50 parts of water-based acrylic resin, 5-10 parts of fluorinated polyurethane resin, 2-4 parts of environmentally friendly surfactant, 2-5 parts of pigment, 2-4 parts of antioxidant, 4-6 parts of biomass graphene, 0.5-1 part of silicon quantum dot solution, 2-4 parts of sodium alginate, 4-6 parts of triethylamine, and 30-40 parts of distilled water; The environmentally friendly surfactant is any one of cocamidopropyl betaine, plant-based surfactant, palm oil-based surfactant, octanol polyoxyethylene ether, bio-alcohol polyoxyethylene ether, and fatty alcohol polyoxyethylene ether; The pigment is one or more of phthalocyanine blue, phthalocyanine green, alizarin red, methylene blue, and bismuth nitride yellow; The antioxidant is one or more of diphenylphenol, p-xylenediamine, and tributylhydroxybenzophenone; The method for preparing biomass graphene comprises the following steps: S1. Biomass waste pretreatment: The biomass waste is placed in an oven and carbonized at 260°C for 30-50 min, and then ground into fine particles to obtain charred biochar; S2. Weigh 5 g of the charred biochar prepared in step S1 and disperse it in 100 mL of 98 wt% H2SO4. Slowly add 12-16 g of KMnO4 and stir continuously at 10-15°C for 30 min. Then transfer to a 35-40°C water bath and stir for 3 h to obtain a green-black mixture. S3. Slowly mix the green-black mixture prepared in step S2 with 100 mL of distilled water, maintaining the temperature at 95° C. for 15-20 min to obtain a brown mixture; S4. Add 100 mL of deionized water to the brown mixture prepared in step S3, and then slowly add 40-50 mL of 30 wt% H2O2 solution until the solution turns light yellow. Filter to obtain a sample, wash the sample several times with distilled water, and ultrasonically exfoliate the sample in an ultrasonic bath for 30 min. Place the sample in an oven and dry it at 80°C for 12 h to obtain biomass graphene. In step S1, the biomass waste is any one of corn straw, sugarcane bagasse, and rice husk, and the particle size of the fine particles is 10±2 μm; The method for preparing the silicon quantum dot solution comprises the following steps: (1) Add 20 mL of distilled water to a beaker, heat to 40°C and maintain for 15 min, add 4-6 mL of 3-aminopropyltriethoxysilane, and stir for 10-20 min to obtain a silicon solution; (2) Add 6-8 mL of 0.1 mol / L ascorbic acid solution to the silicon solution prepared in step (1), stir at 400 rpm for 20 min, cool to room temperature and let stand for 24 h to obtain a silicon quantum dot solution; The preparation of the environmentally friendly high-gloss water-based ink comprises the following steps: i parts by mass of a water-based acrylic resin, a fluorinated polyurethane resin, an environmentally friendly surfactant and distilled water were added to the reactor, stirred at a speed of 300 to 400 rpm for 40 to 60 min and mixed evenly; ii. Add biomass graphene, silicon quantum dot solution, sodium alginate, and triethylamine to the reactor in step i. Continue stirring at 300 to 400 rpm for 60 to 80 min and mix well to obtain a water-based ink.

Images