High-drying-efficiency environment-friendly water-based ink solvent and preparation method thereof

Abstract

The application relates to the technical field of ink solvents, and particularly discloses an environmentally-friendly water-based ink solvent with high drying efficiency and a preparation method thereof, the environmentally-friendly water-based ink solvent with high drying efficiency comprises the following raw materials in parts by weight: 40-60 parts of water, 30-50 parts of a bio-based alcohol compound, 5-15 parts of n-propyl acetate, 0.3-1 part of tripropylene glycol n-butyl ether, 1-3 parts of nano-cellulose, 0.5-1 part of calcium chloride, 1-2 parts of a pH regulator and 0.2-0.4 parts of a chelating agent. The environmentally-friendly water-based ink solvent with high drying efficiency and the preparation method thereof can be used for ink printing, and have the advantages of high drying efficiency and good stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ink solvent, in particular to an environmentally friendly water-based ink solvent with high drying efficiency and a preparation method thereof. BACKGROUND

[0002] In recent years, with the development of global economy and the improvement of people's living standards, the printing industry has ushered in a period of vigorous development. From daily commodity packaging to various publications, printed matter is ubiquitous, which has made the market demand for ink show an increasing trend. As an indispensable key material in the printing process, the performance of ink directly affects the level of printing quality and the speed of production efficiency. At present, the concept of environmental protection is deeply rooted in people's hearts, and the research and application of environmentally friendly ink have become an important direction for the development of the printing industry. Among them, water-based ink gradually occupies the mainstream position in the market due to its significant feature of low volatile organic compounds (VOCs) emission. It has been widely used in packaging printing, publication printing and many other fields, playing a positive role in promoting the printing industry towards a green and environmentally friendly direction. Moreover, the use of water-based ink also reduces environmental pollution, which helps to create a healthier and more sustainable ecological environment. However, with the increasing demand for printing efficiency and environmental protection in the market, some problems of water-based ink have gradually emerged, and how to solve these problems has become a difficult problem to be solved in the industry.

[0003] In the traditional printing field, in order to realize the drying of ink, two main types of ink are usually used, namely water-based ink and solvent-based ink. Among them, solvent-based ink has been widely used for a long time, which mainly realizes the drying of ink through the rapid volatilization of solvent. This drying method can meet the needs of printing production to some extent, but with the strict limitation of VOCs exhaust emission in the world, the use of solvent-based ink has been greatly restricted. In order to deal with VOCs exhaust, enterprises need to invest a lot of funds and equipment, which not only increases the production cost, but also faces the risk of not meeting environmental protection standards. While water-based ink as a substitute for solvent-based ink, although its market share is increasing, its solvent has the problem of difficult volatilization in the production process. Traditional water-based ink solvent mainly takes water as the main body, and water has the characteristics of high latent heat of evaporation and high boiling point, which needs to absorb a large amount of heat energy during evaporation. This means that more energy needs to be provided during the drying of water-based ink, increasing energy consumption and production cost. At the same time, there is a strong hydrogen bond network in the traditional water-based system, and the resistance of evaporation is about 6 times that of solvent-based system, which further hinders the volatilization of solvent. In addition, during the drying process, water-based ink is also prone to surface sealing phenomenon, that is, the surface of ink is quickly dried and sealed into a film, making it difficult for internal moisture to volatilize. This situation leads to uneven drying speed of water-based ink, affecting the printing quality.

[0004] The difficulty of evaporation of the water-based ink solvent in the market seriously affects the efficiency of printing production. Moreover, the problems of solvent and additive residues are also prominent. These residues not only affect the quality of the printed matter, but also cause potential harm to human health and the environment. These problems have become key factors restricting the further development of water-based ink, and an environmentally friendly solvent that can improve the drying efficiency of water-based ink and reduce the residues of solvent and additive is urgently needed to solve these problems. SUMMARY

[0005] In order to improve the drying efficiency of water-based ink, the present application provides an environmentally friendly water-based ink solvent with high drying efficiency and a preparation method thereof.

[0006] In the first aspect, the present application provides an environmentally friendly water-based ink solvent with high drying efficiency, which adopts the following technical solution:

[0007] An environmentally friendly water-based ink solvent with high drying efficiency comprises the following raw materials by weight:

[0008] 40-60 parts of water, 30-50 parts of bio-based alcohol compound, 5-15 parts of n-propyl acetate, 0.3-1 part of tripropylene glycol n-butyl ether, 1-3 parts of nano-cellulose, 0.5-1 part of calcium chloride, 1-2 parts of pH adjuster, and 0.2-0.4 parts of chelating agent.

[0009] By adopting the above technical solution, the bio-based alcohol compound and n-propyl acetate work together to destroy the hydrogen bond points, reduce the hydrogen bond effect, and reduce the latent heat of evaporation of the solvent, thereby accelerating the evaporation rate. In combination with tripropylene glycol n-butyl ether, it can react with resin particles during ink printing, soften the resin particles, and reduce the film forming temperature. At the same time, the higher boiling point can prevent the ink surface layer from drying too quickly to form a closed film layer, ensuring the printing quality while achieving high drying efficiency; nano-cellulose as a thickening agent increases the adhesion of the ink on the substrate, and at the same time, builds a water diffusion channel to accelerate the drying rate; calcium chloride can assist in adjusting the drying speed of the solvent, and plays an auxiliary moisture absorption role during the drying process, reducing the influence of environmental humidity on the drying of water-based ink, further accelerating the drying efficiency and maintaining the stability of the solvent under different humidity environments; the pH adjuster maintains the stability of the system's acidity and alkalinity, and the chelating agent can complex metal ions to prevent them from interfering with the reaction, ensuring the storage stability of the solvent. The present application scheme works together through multiple components to significantly improve the drying efficiency while ensuring environmental performance and printing quality.

[0010] Optionally, the bio-based alcohol compound is a mixture of bio-based ethanol and bio-based isopropyl alcohol in a weight ratio of 4-6:3.

[0011] By adopting the technical scheme, bio-based ethanol and bio-based isopropyl alcohol are mixed in a weight ratio of 4-6:3 to be applied to the environmentally-friendly water-based ink solvent as bio-based alcohol compounds. The bio-based ethanol has a high active hydroxyl group in the molecular structure, which can quickly interact with the polar components in the ink to promote the dissolution and dispersion thereof. The bio-based isopropyl alcohol has a large molecular volume and a unique spatial structure, which can effectively reduce the surface tension of the solvent system and enhance the wettability of the ink. The two are mixed in a specific ratio to synergistically play the roles of dissolution and wetting, so that the ink can better spread and penetrate on the printing substrate. At the same time, the bio-based source endows the ink with good environmental protection. In the drying process, the two are easy to volatilize and have a moderate volatilization rate, which can ensure the rapid drying and solidification of the ink and avoid problems such as ink shrinkage and cracking caused by too fast volatilization, thereby improving the printing quality and drying efficiency.

[0012] Optionally, the weight ratio of the n-propyl acetate to the n-butyl tripropylene glycol ether is (8-12):1.

[0013] By adopting the technical scheme, the n-propyl acetate as a fast-drying component quickly volatilizes on the surface of the liquid film to open the micro-pore channel, and the n-butyl tripropylene glycol ether forms a hydrophilic molecular film on the pore wall by virtue of the long-chain ethoxy structure to prevent the micro-pore from collapsing and guide the deep-layer water to escape, thereby improving the drying rate of the solvent. At the same time, the weak hydrogen bonds formed by the two weaken the hydrogen bond network binding energy of water, so that the size of the water molecule cluster is reduced, the evaporation activation energy is lowered, and the ether bond of the tripropylene glycol anchors the water molecules and accelerates the separation of the interfacial water molecules through the molecular thermal swing effect. Further, the micro-phase separation structure formed by the two produces a local Miecelli effect, which drives the formation of vortex convection inside the ink film, improves the water diffusion flux, eliminates the boundary layer retention effect, and further improves the evaporation rate of the solvent.

[0014] Optionally, the nanocellulose is carboxylated nanocellulose with a diameter of 20-50 nm and an aspect ratio >50.

[0015] By adopting the technical scheme, the high-aspect-ratio rod-like structure is arranged in a direction to form a through three-dimensional nanometer network channel, and the large specific surface area provides a low-resistance diffusion path for water molecules, so that the water migration rate is improved. In addition, the carboxyl group is ionized in an alkaline environment to produce strong negative electricity, which adsorbs water molecules through electrostatic attraction to induce directional electroosmotic flow and drag water molecules to quickly migrate to the surface of the solvent. Further, the surface hydroxyl group breaks down macromolecular water clusters through the "adsorption-desorption" cycle to reduce the evaporation energy, and the carboxyl group forms a weak coordination bond with Ca 2+ which is released by calcium chloride, temporarily traps water to prevent moisture return when the humidity is high, and breaks the bond to ensure the channel is unobstructed when drying. The multi-mechanism synergistic effect greatly improves the drying efficiency and performance stability of the solvent.

[0016] And by limiting the diameter and aspect ratio, the carboxylated nanocellulose can fully contact with the resin, pigment and other components in the ink and produce strong interaction, through physical adsorption and chemical bonding (carboxyl can participate in chemical reaction), the dispersed components are tightly connected together, effectively enhancing the cohesion and stability of the ink system, preventing pigment sedimentation and ink stratification.

[0017] Optionally, the pH regulator is 2-amino-2-methyl-1-propanol.

[0018] By adopting the above technical scheme, 2-amino-2-methyl-1-propanol (AMP-95) is selected as the pH regulator of the high-drying-efficiency environment-friendly water-based ink solvent, and the tertiary amine group thereof is dissociated with water H + The combination forms a specific ion structure, builds a dynamic buffer system, maximizes the electrostatic repulsion between nanofibers, prevents agglomeration, and ensures the smoothness of the water channel; at the same time, the alkalinity of the system is enhanced to promote the reorganization of the hydrogen bond network, reduce the evaporation activation energy of water molecules, and promote water evaporation. And its alpha-amino alcohol structure forms a coordination complementary chain with chelating agent disodium EDTA, preferentially adsorbs catalytic metal ions, blocks the oxidation free radical chain reaction induced by metal ions, prevents the increase of film forming resistance caused by pre-crosslinking of resin in ink, and further improves the water diffusion flux, and the multi-mechanism synergistic effect significantly improves the drying efficiency and system stability of the solvent.

[0019] Optionally, the chelating agent is ethylenediaminetetraacetic acid disodium.

[0020] By adopting the above technical scheme, the drying efficiency and system stability of the solvent are significantly improved. Its six-coordinated ligand structure preferentially forms a high-stability stereoscopic chelate with metal ions, blocks free Ca 2+ Crosslinking with carboxylated nanocellulose avoids the blockage of water diffusion channels due to the formation of gel networks, ensuring smooth diffusion of water in the solvent system, thereby improving drying efficiency; on the other hand, strong chelation of transition metal ions can inhibit the oxidation reaction catalyzed by them, prevent the oxidation of resin, maintain the stability of the solvent system, avoid the increase of film forming resistance caused by resin pre-polymerization, and inhibit the decomposition of color developing groups caused by peroxide, ensure the color stability of the ink, and ultimately realize the comprehensive improvement of drying efficiency, film quality and system stability through multiple synergies.

[0021] Optionally, the raw material further includes 0.1-0.5 parts of acetylene glycol surfactant.

[0022] By adopting the technical scheme, in dynamic surface tension control, the unique alkyne-bishydroxy structure can be arranged at the gas-liquid interface, greatly reducing the surface tension of the solvent, and can quickly reduce to a steady value, quickly driving the internal water of the ink film to migrate to the surface, and the steric hindrance effect of the branched alkyl group effectively inhibits the generation of foam; in the synergistic effect of the nanochannel, the hydroxyl group and the carboxylated nanocellulose -COO - Weak hydrogen bonds are formed, inducing the directional arrangement of nanocellulose at the solvent interface, constructing a "radial" water flow network, and reducing the diffusion resistance of deep water; in the thinning kinetics process of the liquid film, at the drying temperature, the thermal motion of the alkyne group intensifies to trigger the Marangoni convection, greatly improving the thinning rate of the liquid film, and preventing the internal water from being blocked by the skin caused by the skin, and through the synergistic effect of multiple mechanisms, the drying efficiency is improved.

[0023] In a second aspect, the application provides a preparation method of an environmentally friendly water-based ink solvent with high drying efficiency, which adopts the following technical scheme:

[0024] A preparation method of an environmentally friendly water-based ink solvent with high drying efficiency, comprising the following steps:

[0025] Mixing and heating the bio-based alcohol compound, n-propyl acetate, calcium chloride and chelating agent to 35-45 DEG C and stirring to form a transparent solution to obtain a mixed solvent, adding water, dispersing at 2000-3000 rpm for 5-10 min, adding pH regulator, tripropylene glycol n-butyl ether and nanocellulose in turn, mixing and stirring to obtain an environmentally friendly water-based ink solvent with high drying efficiency.

[0026] In summary, the application has the following beneficial effects:

[0027] 1. The application effectively accelerates the solvent evaporation process through multi-component synergistic design. The bio-based alcohol compound and n-propyl acetate synergistically destroy the hydrogen bond network between water molecules, reducing the latent heat of evaporation; tripropylene glycol n-butyl ether delays the rapid film formation of the surface layer, prevents the "enclosed effect", and ensures the continuous escape of internal water; the carboxylated nanocellulose constructs a through three-dimensional nanochannel, providing a low-resistance path for water diffusion, and inducing electroosmotic flow through electrostatic interaction, promoting the directional migration of water molecules; 2-amino-2-methyl-1-propanol adjusts the pH of the system, maintains the high Zeta potential of the nanocellulose surface, prevents agglomeration, and participates in hydrogen bond reorganization, further reducing the evaporation activation energy. The synergistic effect of the above mechanisms significantly improves the drying rate and energy utilization efficiency of the solvent.

[0028] 2, The disodium ethylenediaminetetraacetate in the application can efficiently chelate metal ions, inhibit oxidation side reactions and resin pre-crosslinking caused by metal ions, prevent ink deterioration and film-forming performance degradation; calcium chloride adjusts drying kinetics, alleviates the influence of environmental humidity fluctuations on the drying process, and improves process stability. The preferred n-propyl acetate and n-propyl glycol butyl ether ratio balances fast and slow volatile components, avoiding printing defects such as cracking and wrinkling.

[0029] 3, Bio-based ethanol and bio-based isopropyl alcohol are used as main cosolvents, the raw material source is renewable, VOCs emission is low, and it meets the development trend of green printing. The overall formula does not contain toxic solvents, is environmentally friendly, and is suitable for packaging and publishing printing fields with high environmental protection requirements. DETAILED DESCRIPTION

[0030] The application will be further described in detail below in conjunction with examples, and it is particularly pointed out that: in the following examples, the specific conditions are not specified, and the conventional conditions or the conditions recommended by the manufacturer are used, and the raw materials used in the following examples can be obtained from ordinary market sources unless otherwise specified.

[0031] The surfactant selected is Surfynol 104E, available from Jining Tangyi Chemical Co., Ltd.; the bio-based ethanol can be obtained from the fermentation process of corn, sugarcane, cassava or cellulose biomass; the bio-based isopropyl alcohol can be obtained by biological hydrogenation or microbial fermentation of biomass-derived acetone.

[0032] Example 1

[0033] An environmentally friendly water-based ink solvent with high drying efficiency, the preparation includes the following steps:

[0034] 40 kg of bio-based alcohol compounds, 10 kg of n-propyl acetate, 0.8 kg of calcium chloride, and 0.3 kg of disodium ethylenediaminetetraacetate (chelating agent) are mixed and heated to 40°C, and stirred to form a transparent solution to obtain a mixed solvent. 50 kg of water is added and dispersed at a high speed of 2500 rpm for 8 min, 1.5 kg of 2-amino-2-methyl-1-propanol (pH adjuster), 0.65 kg of tripropylene glycol n-butyl ether, and 2 kg of carboxylated nanocellulose are added in sequence and stirred to obtain an environmentally friendly water-based ink solvent with high drying efficiency; the bio-based alcohol compounds are bio-based ethanol and bio-based isopropyl alcohol mixed in a weight ratio of 5:3; the carboxylated nanocellulose has a diameter of 20-50 nm and an aspect ratio of >50.

[0035] Example 2

[0036] An environmentally friendly water-based ink solvent with high drying efficiency, the preparation includes the following steps:

[0037] Mix 30 kg of bio-based alcohol compounds, 15 kg of n-propyl acetate, 0.5 kg of calcium chloride, and 0.4 kg of disodium ethylenediaminetetraacetate (chelating agent) and heat to 35°C, stir until a transparent solution is formed to obtain a mixed solvent, add 40 kg of water and disperse at 3000 rpm for 5 min, then add 1 kg of 2-amino-2-methyl-1-propanol (pH adjuster), 1 kg of tripropylene glycol n-butyl ether, and 1 kg of carboxylated nanocellulose and stir to obtain a high-drying-efficiency environmentally friendly water-based ink solvent; the bio-based alcohol compounds are obtained by mixing bio-based ethanol and bio-based isopropyl alcohol at a weight ratio of 6:3; the carboxylated nanocellulose has a diameter of 20-50 nm and an aspect ratio > 50.

[0038] Example 3

[0039] A high-drying-efficiency environmentally friendly water-based ink solvent, the preparation comprising the following steps:

[0040] Mix 50 kg of bio-based alcohol compounds, 5 kg of n-propyl acetate, 1 kg of calcium chloride, and 0.2 kg of disodium ethylenediaminetetraacetate (chelating agent) and heat to 45°C, stir until a transparent solution is formed to obtain a mixed solvent, add 60 kg of water and disperse at 2000 rpm for 10 min, then add 2 kg of 2-amino-2-methyl-1-propanol (pH adjuster), 0.3 kg of tripropylene glycol n-butyl ether, and 3 kg of carboxylated nanocellulose and stir to obtain a high-drying-efficiency environmentally friendly water-based ink solvent; the bio-based alcohol compounds are obtained by mixing bio-based ethanol and bio-based isopropyl alcohol at a weight ratio of 4:3; the carboxylated nanocellulose has a diameter of 20-50 nm and an aspect ratio > 50.

[0041] Example 4

[0042] A high-drying-efficiency environmentally friendly water-based ink solvent, which is different from Example 1 in that 6.5 kg of n-propyl acetate is added instead of the original component in this example, and the remaining step components are the same as in Example 1.

[0043] Example 5

[0044] A high-drying-efficiency environmentally friendly water-based ink solvent, which is different from Example 1 in that 5.2 kg of n-propyl acetate is added instead of the original component in this example, and the remaining step components are the same as in Example 1.

[0045] Example 6

[0046] A high-drying-efficiency environmentally friendly water-based ink solvent, which is different from Example 1 in that 7.8 kg of n-propyl acetate is added instead of the original component in this example, and the remaining step components are the same as in Example 1.

[0047] Example 7

[0048] A high-drying-efficiency environmentally friendly water-based ink solvent, which is different from Example 4 in that 0.25 kg of acetylene glycol surfactant is added in this example. Preparation includes the following steps:

[0049] Mix 40 kg of bio-based alcohol compounds, 10 kg of n-propyl acetate, 0.8 kg of calcium chloride, and 0.3 kg of disodium ethylenediaminetetraacetate (chelating agent) and heat to 40°C, stir until a transparent solution is formed to obtain a mixed solvent, add 50 kg of water and disperse at 2500 rpm for 8 min, add 1.5 kg of 2-amino-2-methyl-1-propanol (pH regulator), 1 kg of tripropylene glycol n-butyl ether, and 2 kg of carboxylated nanocellulose in sequence and mix and stir, finally add 0.25 kg of acetylene glycol surfactant and shear homogenize to obtain a high-drying-efficiency environmentally friendly water-based ink solvent; the bio-based alcohol compounds are bio-based ethanol and bio-based isopropyl alcohol mixed in a weight ratio of 5:3; the carboxylated nanocellulose has a diameter of 20-50 nm and an aspect ratio > 50.

[0050] Example 8

[0051] A high-drying-efficiency environmentally friendly water-based ink solvent, which is different from Example 7 in that 0.1 kg of acetylene glycol surfactant is added in this example.

[0052] Example 9

[0053] A high-drying-efficiency environmentally friendly water-based ink solvent, which is different from Example 7 in that 0.5 kg of acetylene glycol surfactant is added in this example.

[0054] Comparative Example 1

[0055] A high-drying-efficiency environmentally friendly water-based ink solvent, which is different from Example 1 in that no carboxylated nanocellulose is added in this comparative example.

[0056] Comparative Example 2

[0057] A high-drying-efficiency environmentally friendly water-based ink solvent, which is different from Example 1 in that bio-based alcohol is replaced by traditional alcohol in this comparative example, i.e., bio-based ethanol and bio-based isopropyl alcohol are replaced by the same amount of petroleum-based ethanol and isopropyl alcohol.

[0058] Comparative Example 3

[0059] A high-drying-efficiency environmentally friendly water-based ink solvent, which is different from Example 1 in that no calcium chloride and disodium ethylenediaminetetraacetate are added in this comparative example.

[0060] Performance detection test

[0061] Detection method / test method

[0062] Surface tension (mN / m): The surface tension of the solvent was determined according to GB / T 22237-2008 "Determination of surface tension of surfactants";

[0063] Vaporization rate (relative value, ethyl acetate = 1): The vaporization rate of the solvent was tested according to the method related to ASTM D3539-11(2020);

[0064] Drying energy consumption (kWh / kg): The energy consumption of the solvent drying was calculated according to the method related to GB / T 2589-2020 "General rules for calculation of comprehensive energy consumption";

[0065] Storage stability (30 days): The viscosity change rate of the solvent was tested according to the method shown in GB / T 6753.3-1986 "Test method for storage stability of paints", and the lower the viscosity change rate, the better the storage stability of the solvent.

[0066] Table 1 Test data

[0067]

[0068] It can be seen from Examples 1-3 and Comparative Example 1 in combination with Table 1 that the experimental data of Examples 1-3 are all better than those of Comparative Example 1, which indicates that the addition of nanocellulose forms a certain network structure in the solvent, which can increase the movement space and diffusion channel of the solvent molecules, promote the volatilization of the solvent molecules, and make the solvent change from liquid state to gaseous state more quickly during the drying process, thereby reducing the drying time and improving the drying efficiency.

[0069] It can be seen from Examples 1-3 and Comparative Example 2 in combination with Table 1 that the experimental data of Examples 1-3 are all better than those of Comparative Example 2, which indicates that the bio-based alcohol substance is more likely to change from liquid state to gaseous state at room temperature, which accelerates the volatilization rate of the solvent, so that the solvent can be removed more quickly during the drying process, thereby reducing the drying time and energy consumption.

[0070] It can be seen from Examples 1-3 and Comparative Example 3 in combination with Table 1 that the experimental data of Examples 1-3 are all better than those of Comparative Example 3, which indicates that EDTA chelates the trace metal impurities such as Cu 2+ , Fe 3+ , etc. in the ink, preventing them from catalyzing oxidation and crosslinking; CaCl2 inhibits the dissociation of cellulose carboxyl groups through the same ion effect, reducing hydrogen bond agglomeration, and the lack of these two substances will cause the system to flocculate, affecting the storage stability of the solvent.

[0071] It can be seen from the combination of Examples 1-6 and Table 1 that the experimental data of Examples 4-6 are better than those of Examples 1-3, which indicates that further controlling the addition ratio of n-propyl acetate and n-butyl tripropylene glycol ether can adjust the overall volatilization rate of the solvent to an optimal value, so that the volatilization process before and after is smooth and efficient.

[0072] It can be seen from the combination of Example 4 and Examples 7-9 and Table 1 that the experimental data of Examples 7-9 are better than those of Example 4, which indicates that the addition of acetylenic glycol surfactant can quickly arrange on the surface of the solvent to form a layer of tight molecular film, which weakens the cohesive force between the solvent molecules, thereby significantly reducing the surface tension and improving the volatilization rate of the solvent, thereby further improving the performance of the ink solvent.

[0073] The specific embodiments are only an explanation of the present application, which is not a limitation of the present application. Those skilled in the art can make modifications to the embodiments without creative contribution after reading the specification, but as long as the modifications are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A high-drying efficiency eco-friendly water-based ink solvent, characterized by, The raw materials include the following weight parts: Water 40-60 parts, bio-based alcohol compound 30-50 parts, n-propyl acetate 5-15 parts, tripropylene glycol n-butyl ether 0.3-1 part, nano-cellulose 1-3 parts, calcium chloride 0.5-1 part, pH regulator 1-2 parts, and chelating agent 0.2-0.4 parts; the nano-cellulose is carboxylated nano-cellulose with a diameter of 20-50 nm and an aspect ratio > 50; the pH regulator is 2-amino-2-methyl-1-propanol; and the chelating agent is disodium ethylenediaminetetraacetate.

2. The high-drying-efficiency environment-friendly water-based ink solvent according to claim 1, characterized in that: The bio-based alcohol compound is a mixture of bio-based ethanol and bio-based isopropyl alcohol in a weight ratio of 4-6:

3.

3. The high-drying-efficiency environment-friendly water-based ink solvent according to claim 1, characterized in that: The weight ratio of n-propyl acetate to tripropylene glycol n-butyl ether is (8-12):

1.

4. The high-drying-efficiency environment-friendly water-based ink solvent according to claim 1, characterized in that: The raw materials also include 0.1-0.5 parts of acetylenic diol surfactant.

5. The method of producing a high-drying efficiency eco-friendly water-based ink solvent according to any one of claims 1 to 3, characterized by, The method includes the following steps: Mix the bio-based alcohol compound, n-propyl acetate, calcium chloride, and chelating agent, heat to 35-45℃, and stir to form a transparent solution to obtain a mixed solvent, add water, disperse at 2000-3000 rpm for 5-10 min, sequentially add the pH regulator, tripropylene glycol n-butyl ether, and nano-cellulose, and mix and stir to obtain an environmentally friendly water-based ink solvent with high drying efficiency.

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