High-thermal-conductivity crystallization-inhibiting ice crystal material added with graphite powder and preparation method of high-thermal-conductivity crystallization-inhibiting ice crystal material

Abstract

The invention discloses a graphite-powder-added high-thermal-conductivity devitrification-inhibiting ice crystal material and a preparation method thereof, and belongs to the technical field of ice crystal preparation, the graphite-powder-added high-thermal-conductivity devitrification-inhibiting ice crystal material comprises water and an additive, the additive comprises graphite powder with the particle size of 5-15 microns, a stabilizer, a nucleating agent, an anticorrosive agent, a surfactant and a preservative, wherein the graphite powder is added, so that the heat exchange process in the ice crystal can be accelerated. When the freezing system runs, heat in ice crystals can be transmitted to other parts of the freezing system more quickly through the graphite powder network, so that the freezing process of the ice crystals is accelerated, and the refrigerating efficiency is improved; the stabilizer can ensure that the graphite powder is uniformly distributed in the ice crystal and prevent the graphite powder from precipitating or agglomerating, so that more stable heat exchange and more uniform ice crystal growth can be realized; the nucleating agent can promote nucleation of ice crystals under specific temperature and conditions, so that the growth speed and form of the ice crystals are controlled, and the freezing effect and the product quality can be optimized.

Description

Technical Field

[0001] The invention relates to the technical field of ice crystal preparation, and in particular to a high-thermal-conductivity crystallization-inhibiting ice crystal material added with graphite powder and a preparation method thereof. Background Art

[0002] Ice crystal materials refer to materials that have been improved and processed based on ice for use in various engineering and scientific fields. During the freezing process, the precipitation and growth of ice crystals is a complex process. If ice crystals precipitate too quickly or unevenly, it may cause the volume of ice crystals to expand and damage the box of the freezing equipment. Summary of the invention

[0003] Based on the above problems, an embodiment of the present invention provides a high thermal conductivity crystallization inhibiting ice crystal material with added graphite powder and a preparation method thereof. The high thermal conductivity crystallization inhibiting ice crystal material with added graphite powder absorbs water and expands when the temperature decreases to form a solid-like structure; when the temperature increases, it slowly releases water to extend the refrigeration time. The contents of the present invention are as follows:

[0004] The first object of the present invention is to provide a high thermal conductivity ice crystal inhibition material with added graphite powder, including water and additives. The technical point is that the amount of the additive added is 1-1.5wt% of the ice crystal inhibition material. In terms of weight parts, the additive includes 1-3 weight parts of graphite powder with a particle size of 5-15μm, 20-60 weight parts of stabilizer, 0.1-0.3 weight parts of nucleating agent, 0.1-0.3 weight parts of corrosion inhibitor, 0.1-0.3 weight parts of surfactant and 0.05-0.06 weight parts of preservative.

[0005] In order to better realize the above technical solution, the high thermal conductivity ice crystal precipitation inhibition material with added graphite powder of the present invention also includes 1-3 parts by weight of pigment or fluorescent agent.

[0006] In order to better realize the above technical solution, the pigment in the high thermal conductivity ice crystal material with added graphite powder of the present invention is at least one of carotene, lutein and cochineal red.

[0007] In order to better realize the above technical scheme, the fluorescent agent in the high thermal conductivity crystallization inhibition ice crystal material with added graphite powder of the present invention is at least one of fluorescein isothiocyanate, tetraethylrhodamine and tetramethylrhodamine isothiocyanate.

[0008] In order to better realize the above technical scheme, the stabilizer in the high thermal conductivity ice crystal inhibiting material with added graphite powder of the present invention is at least one of polysaccharide gum and sodium carboxymethyl cellulose.

[0009] In order to better realize the above technical scheme, the nucleating agent in the high thermal conductivity crystallization ice crystal inhibiting material with added graphite powder of the present invention is at least one of polybutylene succinate, polyamide and polytetrafluoroethylene.

[0010] In order to better realize the above technical solution, the corrosion inhibitor in the high thermal conductivity ice crystal inhibition material with added graphite powder of the present invention is at least one of chromate and phosphate.

[0011] In order to better realize the above technical solution, the surfactant in the high thermal conductivity ice crystal inhibition material with added graphite powder of the present invention is at least one of polyvinyl alcohol, ethylene glycol and propylene glycol.

[0012] In order to better realize the above technical scheme, the preservative in the high thermal conductivity ice crystal inhibition material with added graphite powder of the present invention is at least one of kason, sodium benzoate and isothiazolin.

[0013] The second object of the present invention is to provide a method for preparing a high thermal conductivity ice crystal material with graphite powder added thereto, the method comprising the following steps:

[0014] Step 1, adding graphite powder to an appropriate amount of water, stirring until the resin is evenly mixed to form a uniform first mixed liquid;

[0015] Step 2, mixing water, stabilizer, nucleating agent, anticorrosive agent, surfactant and preservative evenly to obtain a second mixed liquid;

[0016] Step 3, mixing the first mixed liquid obtained in step 1 and the second mixed liquid in step 2 to obtain a crystallization-inhibiting ice crystal material;

[0017] Step 3: Place the ice crystal inhibiting material in a suitable closed container to prevent leakage, and seal it tightly.

[0018] Compared with the prior art, the high thermal conductivity ice crystal material with added graphite powder and the preparation method thereof of the present invention has the following beneficial effects:

[0019] The high thermal conductivity crystallization inhibiting ice crystal material with added graphite powder of the present invention comprises water and additives, wherein the additives comprise graphite powder with a particle size of 5-15 μm, stabilizers, nucleating agents, anticorrosive agents, surfactants and preservatives, wherein the addition of graphite powder can accelerate the heat exchange process inside the ice crystals. When the refrigeration system is running, the heat in the ice crystals can be transferred to other parts of the refrigeration system more quickly through the graphite powder network, thereby accelerating the freezing process of the ice crystals and improving the refrigeration efficiency; the stabilizer can ensure the uniform distribution of graphite powder in the ice crystals and prevent them from precipitating or agglomerating, which helps to achieve more stable heat exchange and more uniform ice crystal growth; the nucleating agent can promote the nucleation of ice crystals under specific temperatures and conditions, thereby controlling the growth rate and morphology of ice crystals, which helps to optimize the freezing effect and product quality. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of 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.

[0021] Example 1

[0022] A high thermal conductivity ice crystal inhibiting material with added graphite powder comprises water and additives, wherein the additive is added in an amount of 1.25wt% of the ice crystal inhibiting material, and the additive comprises 2kg of graphite powder with a particle size of 10μm, 40kg of a stabilizer, 0.4kg of a nucleating agent, 0.4kg of a corrosion inhibitor, 0.4kg of a surfactant and 0.055kg of a preservative.

[0023] Furthermore, the amount of the high thermal conductivity ice crystal inhibition material with added graphite powder in this embodiment also includes 2 kg of pigment.

[0024] Preferably, the pigment in the high thermal conductivity ice crystal material for inhibiting crystallization with added graphite powder in this embodiment is carotene.

[0025] Furthermore, the stabilizer in the high thermal conductivity ice crystal inhibiting material with added graphite powder in this embodiment is polysaccharide glue.

[0026] Furthermore, the nucleating agent in the high thermal conductivity ice crystal inhibiting material with added graphite powder in this embodiment is polybutylene succinate.

[0027] Furthermore, the corrosion inhibitor in the high thermal conductivity ice crystal inhibiting material with added graphite powder in this embodiment is.

[0028] Furthermore, the surfactant in the high thermal conductivity ice crystal inhibition material with added graphite powder in this embodiment is polyvinyl alcohol.

[0029] Furthermore, the preservative in the high thermal conductivity ice crystal inhibiting material with added graphite powder in this embodiment is kason.

[0030] A method for preparing a high thermal conductivity ice crystal material with graphite powder added in this embodiment includes the following steps:

[0031] Step 1, adding graphite powder to an appropriate amount of water, stirring until the resin is evenly mixed to form a uniform first mixed liquid;

[0032] Step 2, mixing water, stabilizer, nucleating agent, anticorrosive agent, surfactant and preservative evenly to obtain a second mixed liquid;

[0033] Step 3, mixing the first mixed liquid obtained in step 1 and the second mixed liquid in step 2 to obtain a crystallization-inhibiting ice crystal material;

[0034] Step 3: Place the ice crystal inhibiting material in a suitable closed container to prevent leakage, and seal it tightly.

[0035] Example 2

[0036] A high thermal conductivity ice crystal inhibiting material with added graphite powder comprises water and additives, wherein the additive is added in an amount of 1.5wt% of the ice crystal inhibiting material, and the additive comprises 3kg of graphite powder with a particle size of 15μm, 60kg of a stabilizer, 0.3kg of a nucleating agent, 0.3kg of an anti-corrosion agent, 0.3kg of a surfactant and 0.06kg of a preservative.

[0037] Furthermore, the amount of the high thermal conductivity ice crystal inhibition material with added graphite powder in this embodiment also includes 3 kg of fluorescent agent.

[0038] Preferably, the fluorescent agent in the high thermal conductivity ice crystal inhibition material with added graphite powder in this embodiment is fluorescein isothiocyanate.

[0039] Furthermore, the stabilizer in the high thermal conductivity ice crystal inhibiting material with added graphite powder in this embodiment is sodium carboxymethyl cellulose.

[0040] Furthermore, the nucleating agent in the high thermal conductivity ice crystal inhibition material with added graphite powder in this embodiment is polyamide.

[0041] Furthermore, the corrosion inhibitor in the high thermal conductivity ice crystal inhibition material with added graphite powder in this embodiment is phosphate.

[0042] Furthermore, the surfactants in the high thermal conductivity ice crystal inhibition material with added graphite powder in this embodiment are ethylene glycol and.

[0043] Furthermore, the preservative in the high thermal conductivity ice crystal inhibition material with added graphite powder in this embodiment is sodium benzoate.

[0044] A method for preparing a high thermal conductivity ice crystal material with graphite powder added in this embodiment includes the following steps:

[0045] Step 1, adding graphite powder to an appropriate amount of water, stirring until the resin is evenly mixed to form a uniform first mixed liquid;

[0046] Step 2, mixing water, stabilizer, nucleating agent, anticorrosive agent, surfactant and preservative evenly to obtain a second mixed liquid;

[0047] Step 3, mixing the first mixed liquid obtained in step 1 and the second mixed liquid in step 2 to obtain a crystallization-inhibiting ice crystal material;

[0048] Step 3: Place the ice crystal inhibiting material in a suitable closed container to prevent leakage, and seal it tightly.

[0049] Example 3

[0050] A high thermal conductivity ice crystal inhibiting material with added graphite powder comprises water and additives, wherein the additive is added in an amount of 1wt% of the ice crystal inhibiting material, and the additive comprises 1kg of graphite powder with a particle size of 5μm, 20kg of a stabilizer, 0.1kg of a nucleating agent, 0.1kg of an anti-corrosion agent, 0.1kg of a surfactant and 0.05kg of a preservative.

[0051] Furthermore, the stabilizer in the high thermal conductivity ice crystal inhibiting material with added graphite powder in this embodiment is sodium carboxymethyl cellulose.

[0052] Furthermore, the nucleating agent in the high thermal conductivity ice crystal inhibition material with added graphite powder in this embodiment is polytetrafluoroethylene.

[0053] Furthermore, the corrosion inhibitor in the high thermal conductivity ice crystal inhibition material with added graphite powder in this embodiment is chromate.

[0054] Furthermore, the surfactant in the high thermal conductivity ice crystal inhibition material with added graphite powder in this embodiment is propylene glycol.

[0055] Furthermore, the preservative in the high thermal conductivity ice crystal inhibition material with added graphite powder in this embodiment is isothiazolin.

[0056] A method for preparing a high thermal conductivity ice crystal material with graphite powder added in this embodiment includes the following steps:

[0057] Step 1, adding graphite powder to an appropriate amount of water, stirring until the resin is evenly mixed to form a uniform first mixed liquid;

[0058] Step 2, mixing water, stabilizer, nucleating agent, anticorrosive agent, surfactant and preservative evenly to obtain a second mixed liquid;

[0059] Step 3, mixing the first mixed liquid obtained in step 1 and the second mixed liquid in step 2 to obtain a crystallization-inhibiting ice crystal material;

[0060] Step 3: Place the ice crystal inhibiting material in a suitable closed container to prevent leakage, and seal it tightly.

[0061] Comparative Example 1

[0062] The "additives include 2 kg of graphite powder with a particle size of 10 μm, 40 kg of stabilizer, 0.4 kg of nucleating agent, 0.4 kg of anti-corrosion agent, 0.4 kg of surfactant and 0.055 kg of preservative" in Example 1 is changed to "includes 40 kg of stabilizer, 0.4 kg of nucleating agent, 0.4 kg of anti-corrosion agent, 0.4 kg of surfactant and 0.055 kg of preservative", and the remaining operations are the same as Example 1.

[0063] Test example

[0064] The ice crystal materials for inhibiting crystallization of Examples 1-3 and Comparative Example 1 that have been stored in cold storage were placed in a freezer, and the changes and temperatures of the ice crystal materials for inhibiting crystallization were recorded every 10 minutes. The specific experimental results are as follows:

[0065] Table 1

[0066] Example 1 Example 2 Example 3 Comparative Example 1 Ice crystal precipitation time / h 5 6 5 3 Ice crystal precipitation temperature / ℃ -8℃ -7℃ -8℃ -5℃

[0067] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A high thermal conductivity material for inhibiting crystallization of ice crystals with added graphite powder, comprising water and additives, characterized in that: The additive is added in an amount of 1-1.5wt% of the ice crystal inhibiting material. In terms of weight parts, the additive includes 1-3 weight parts of graphite powder with a particle size of 5-15μm, 20-60 weight parts of stabilizer, 0.1-0.3 weight parts of nucleating agent, 0.1-0.3 weight parts of corrosion inhibitor, 0.1-0.3 weight parts of surfactant and 0.05-0.06 weight parts of preservative.

2. The high thermal conductivity ice crystal inhibiting material with added graphite powder according to claim 1, characterized in that: The added amount also includes 1-3 parts by weight of a pigment or a fluorescent agent.

3. The high thermal conductivity ice crystal inhibiting material with added graphite powder according to claim 2, characterized in that: The pigment is at least one of carotene, lutein and cochineal.

4. The high thermal conductivity ice crystal inhibiting material with added graphite powder according to claim 2, characterized in that: The fluorescent agent is at least one of fluorescein isothiocyanate, tetraethyl rhodamine and tetramethyl rhodamine isothiocyanate.

5. The high thermal conductivity ice crystal inhibiting material with added graphite powder according to claim 1, characterized in that: The stabilizer is at least one of polysaccharide gum and sodium carboxymethyl cellulose.

6. The high thermal conductivity ice crystal inhibiting material with added graphite powder according to claim 1, characterized in that: The nucleating agent is at least one of polybutylene succinate, polyamide and polytetrafluoroethylene.

7. The high thermal conductivity ice crystal inhibiting material with added graphite powder according to claim 1, characterized in that: The anticorrosive agent is at least one of chromate and phosphate.

8. The high thermal conductivity ice crystal inhibiting material with added graphite powder according to claim 1, characterized in that: The surfactant is at least one of polyvinyl alcohol, ethylene glycol and propylene glycol.

9. The high thermal conductivity ice crystal inhibiting material with added graphite powder according to claim 1, characterized in that: The preservative is at least one of kasone, sodium benzoate and isothiazolin.

10. A method for preparing a high thermal conductivity ice crystal material with graphite powder added, characterized in that: The following steps are involved: Step 1, adding graphite powder to an appropriate amount of water, stirring until the resin is evenly mixed to form a uniform first mixed liquid; Step 2, mixing water, stabilizer, nucleating agent, anticorrosive agent, surfactant and preservative evenly to obtain a second mixed liquid; Step 3, mixing the first mixed liquid obtained in step 1 and the second mixed liquid in step 2 to obtain a crystallization-inhibiting ice crystal material; Step 3: Place the ice crystal inhibiting material in a suitable closed container to prevent leakage, and seal it tightly.