Oxygen crystal material, preparation method and application thereof

Abstract

This invention provides an oxygen crystal material, its preparation method, and its applications, relating to the field of inorganic materials technology. By mass percentage, it comprises the following components: 30-50% sodium peroxide particles, 10-30% calcium chloride powder, and 20-40% alginate powder. When used as the contents of an oxygen crystal box in the preparation of oxygen-generating masks, the oxygen crystal material provided by this invention can control the reaction rate of sodium peroxide, ensuring a stable oxygen supply and avoiding problems of excessively high or low oxygen concentrations due to overly rapid reactions. Controlling the reaction rate of sodium peroxide also reduces its corrosiveness, improving the safety of the mask and providing excellent oxygen supply and dehumidification effects.

Description

Technical Field

[0001] This invention relates to the field of inorganic materials technology, and in particular to an oxygen crystal material, its preparation method, and its application. Background Technology

[0002] The oxygen crystal box in the oxygen-generating mask mainly contains oxygen crystal material and multiple layers of protective material. The oxygen crystal material generates oxygen and negative oxygen ions through a chemical reaction, providing a continuous oxygen supply to the wearer; the multiple layers of protective material effectively block tiny pollutants in the air, ensuring clean and safe breathing. At the same time, the mask's ergonomic design enhances wearing comfort and fit.

[0003] Sodium peroxide (Na₂O₂) is widely used in oxygen supply and dehumidification because it reacts with water and carbon dioxide to produce oxygen. In medical emergency care, sodium peroxide serves as a safe and effective oxygen supplier, continuously and stably releasing oxygen to provide necessary oxygen support to injured personnel. In deep-sea diving, sodium peroxide can be used as an oxygen supplier for divers, ensuring sufficient oxygen supply during long dives. In industrial applications, sodium peroxide acts as a highly efficient dehumidifier, reacting with water vapor in the air to produce oxygen, thereby reducing air humidity.

[0004] However, when sodium peroxide, as a strong oxidant, is added to the contents of oxygen crystal boxes as an oxygen crystal material and used in the preparation of oxygen-generating masks, its application in the field of oxygen-generating masks is limited due to the violent and corrosive nature of the reaction process and its low safety. Summary of the Invention

[0005] The purpose of this invention is to provide an oxygen crystal material, comprising the following components by mass percentage: 30-50% sodium peroxide particles, 10-30% calcium chloride powder, and 20-40% alginate powder. When this oxygen crystal material is used as the contents of an oxygen crystal box to prepare an oxygen-generating mask, during human exhalation, water vapor and carbon dioxide are exhaled. When the water vapor in the exhaled breath comes into contact with the sodium peroxide particles, a reaction occurs to generate sodium hydroxide and oxygen. The oxygen is used for oxygen supply, while the sodium hydroxide and alginate powder continue to react to generate sodium alginate. Sodium alginate further undergoes a gelation reaction with the calcium chloride powder to form a gel. The gel coats the remaining sodium peroxide, thus isolating the water vapor from contact with the sodium peroxide to a certain extent. The coating effect of the gel controls the reaction rate of the sodium peroxide, ensuring a stable oxygen supply and avoiding problems of excessively high or low oxygen concentrations due to excessively rapid reactions. By controlling the reaction rate of sodium peroxide, its corrosiveness is also reduced, improving the safety of the mask and providing excellent oxygen supply and dehumidification effects.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: This invention provides an oxygen crystal material, comprising the following components by mass percentage: Sodium peroxide granules 30-50%, calcium chloride powder 10-30%, and alginate powder 20-40%.

[0007] Furthermore, based on the above technical solution of the present invention, the particle size of the sodium peroxide particles is 200-500 μm; The alginate powder has a particle size of 50-100 μm; The calcium chloride powder has a particle size of 10-25 μm.

[0008] Furthermore, based on the above technical solution of the present invention, the particle size of the sodium peroxide particles: the particle size of the alginic acid: the particle size of the calcium chloride powder = (10-30):(2-10):1.

[0009] The present invention also provides a method for preparing the above-mentioned oxygen crystal material, comprising the following steps: S1: After seaweed pretreatment, seaweed powder is obtained; S2: Place the seaweed powder in an acidic solution, heat and stir to obtain an acid hydrolysate; S3: Filter the acid hydrolysate to obtain a filtrate, then place the filtrate in an ethanol solution for precipitation and centrifugation to obtain alginic acid precipitate; S4: After washing and drying the alginic acid precipitate, alginic acid powder is obtained; S5: The alginate powder, calcium chloride powder and sodium peroxide particles are placed in a stirrer and stirred to obtain oxygen crystal material.

[0010] Furthermore, based on the above technical solution of the present invention, in step S1, the preprocessing includes: The seaweed plants are washed, dried, and then ground to obtain seaweed powder. The drying conditions include: a temperature of 40-60℃, a time of 24-48 hours, and a humidity of 40-60%. The average particle size of the seaweed powder is 1-3 mm.

[0011] Furthermore, based on the above technical solution of the present invention, in step S2, the acidic solution includes one or more of hydrochloric acid or sulfuric acid; The concentration of the acidic solution is 1-3%; The conditions for heating and stirring include: The temperature is 60-90℃, and the time is 30-60 minutes.

[0012] Furthermore, based on the above technical solution of the present invention, in step S3, the concentration of the ethanol solution is 60-75%; The volume ratio of the ethanol solution to the filtrate is (1-2):1; In step S3, the precipitation time is 1-2 hours; In step S3, the centrifugation rate is 7000-8000 r / min, and the time is 3-5 min; Furthermore, based on the above technical solution of the present invention, in step S4, the detergent for washing is the ethanol solution described in step S3; In step S4, the drying conditions include: The drying temperature is 50-70℃, and the drying time is 4-8 hours.

[0013] Furthermore, based on the above technical solution of the present invention, in step S5, the conditions of the stirrer include: The stirring speed is 200-400 r / min, and the stirring time is 15-30 min.

[0014] The present invention also provides an application of the oxygen crystal material prepared by the oxygen crystal material prepared by the method described above, characterized in that the oxygen crystal material can be used as the contents of an oxygen crystal box to prepare an oxygen-generating mask.

[0015] The present invention provides an oxygen crystal material, its preparation method, and its application, with the following beneficial effects: 1. When the oxygen crystal material provided by this invention is used as the content of an oxygen crystal box to prepare an oxygen-generating mask, during human exhalation, water vapor and carbon dioxide are exhaled. When the water vapor in the exhaled breath comes into contact with sodium peroxide particles, a reaction occurs to generate sodium hydroxide and oxygen. The oxygen is used for oxygen supply. Meanwhile, sodium hydroxide and alginate powder continue to react to generate sodium alginate. Sodium alginate further reacts with calcium chloride powder to form a gel. The gel coats the remaining sodium peroxide, isolating water vapor from contact with sodium peroxide to a certain extent. The coating effect of the gel controls the reaction rate of sodium peroxide, ensuring a stable oxygen supply and avoiding problems of excessively high or low oxygen concentrations due to excessively rapid reactions. By controlling the reaction rate of sodium peroxide, its corrosiveness is also reduced, improving the safety of the mask and providing excellent oxygen supply and dehumidification effects.

[0016] 2. In this invention, the particle size ratio of sodium peroxide particles, alginate powder, and calcium chloride powder is specified as (10-30):(2-10):1. The primary purpose of this design is to create a certain porosity in the prepared oxygen crystal material. This design ensures that when the wearer exhales, the exhaled water vapor can effectively contact the sodium peroxide particles. Once the water vapor contacts the sodium peroxide, a chemical reaction is triggered, generating oxygen and sodium hydroxide, providing a continuous and stable oxygen supply for the wearer. Furthermore, this differentiated particle size design also provides a coating space for the generated gel. When sodium alginate and calcium chloride powder undergo a gelation reaction, a gel is formed. The coating effect of the gel can slow down the reaction rate of sodium peroxide, preventing a strong reaction during mask use that could lead to excessive oxygen release or excessive heat accumulation. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be clearly and completely described below in conjunction with the embodiments of this invention. Those skilled in the art should understand that the embodiments described are merely illustrative of the invention and should not be considered as specific limitations thereof. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention. Process parameters not specifically specified in the following embodiments are generally performed under conventional conditions.

[0018] The endpoints and any values ​​of the ranges disclosed in this invention are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this invention.

[0019] According to a first aspect of the present invention, an oxygen crystal material is provided, comprising the following components by mass percentage: Sodium peroxide granules 30-50% (e.g., 35%, 40%, 45%), calcium chloride powder 10-30% (e.g., 15%, 20%, 25%), and alginate powder 20-40% (e.g., 25%, 30%, 35%).

[0020] Specifically, when the oxygen crystal material is used as the contents of an oxygen crystal box to prepare an oxygen-generating mask, during human exhalation, water vapor and carbon dioxide are exhaled. When the water vapor in the exhaled breath comes into contact with sodium peroxide particles, a reaction occurs to generate sodium hydroxide and oxygen. The oxygen is used for oxygen supply. Meanwhile, sodium hydroxide and alginate powder continue to react to generate sodium alginate. Sodium alginate further reacts with calcium chloride powder to form a gel. The gel coats the remaining sodium peroxide, isolating water vapor from contact with sodium peroxide to some extent. The coating effect of the gel controls the reaction rate of sodium peroxide, ensuring a stable oxygen supply and avoiding problems of excessively high or low oxygen concentrations due to excessively rapid reactions. By controlling the reaction rate of sodium peroxide, its corrosiveness is also reduced, improving the safety of the mask and providing excellent oxygen supply and dehumidification effects.

[0021] Furthermore, when the mask is first used, there is little water vapor inside, and the reaction with sodium peroxide is limited. As the mask is used for a longer period of time, the water vapor inside the mask gradually increases. At this time, the gel also begins to coat the sodium peroxide, which plays a role in controlling the reaction rate of sodium peroxide, so that the oxygen-generating mask can achieve good safety and comfort from beginning to end.

[0022] As an optional embodiment of the present invention, the particle size of the sodium peroxide particles is 200-500 μm (e.g., 250 μm, 300 μm, 350 μm, 400 μm, 450 μm, etc.). The alginate powder has a particle size of 50-100μm (e.g., 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 95μm, etc.). The calcium chloride powder has a particle size of 10-25 μm (e.g., 12 μm, 15 μm, 18 μm, 20 μm, 22 μm, 24 μm, etc.).

[0023] As an optional embodiment of the present invention, the particle size of the sodium peroxide particles: the particle size of the alginate powder: the particle size of the calcium chloride powder = (10-30):(2-10):1 (e.g., 10:2:1, 20:2:1, 30:2:1, 10:4:1, 20:4:1, 30:4:1, 10:6:1, 20:6:1, 30:6:1, 10:8:1, 20:8:1, 30:8:1, etc.).

[0024] Specifically, this invention specifies the particle size ratio of sodium peroxide particles, alginate powder, and calcium chloride powder as (10-30):(2-10):1. The primary purpose of this is to create a certain porosity in the prepared oxygen crystal material. This design ensures that when the wearer exhales, the exhaled water vapor can effectively contact the sodium peroxide particles. Once the water vapor contacts the sodium peroxide, a chemical reaction is triggered, generating oxygen and sodium hydroxide, providing the wearer with a continuous and stable oxygen supply. Furthermore, this differentiated particle size design also provides a coating space for the generated gel. When sodium alginate and calcium chloride powder undergo a gelation reaction, a gel is formed. The coating effect of the gel slows down the reaction rate of sodium peroxide, preventing a strong reaction during mask use that could lead to excessive oxygen release or excessive heat accumulation.

[0025] Furthermore, this invention limits the particle size of sodium peroxide particles to 200-500 μm, which is much larger than the particle size selection for alginate powder and calcium chloride powder. This is because smaller particle size results in a larger contact area with water vapor. In the initial stages of mask use, to avoid an overly vigorous reaction between sodium peroxide and water vapor, the particle size of the sodium peroxide particles is set to 200-500 μm. This design ensures sufficient oxygen supply while preventing excessively strong reactions from the sodium peroxide particles in the early stages of mask use.

[0026] Furthermore, in order to quickly neutralize the generated sodium hydroxide, the present invention limits the particle size of the alginate powder to 50-100μm, which can ensure that it reacts rapidly with sodium hydroxide, thereby avoiding the accumulation of sodium hydroxide inside the mask and affecting the wearer's comfort and safety.

[0027] Furthermore, this invention limits the particle size of calcium chloride powder to 10-25 μm, which is much smaller than the particle size of sodium peroxide and alginate powder. This is to generate a gel with better coating properties. When calcium chloride comes into contact with the generated sodium alginate, a gelation reaction occurs rapidly in the presence of water vapor, forming a tight gel layer. This gel layer can effectively encapsulate the sodium peroxide particles, further controlling the reaction rate and ensuring a stable supply of oxygen.

[0028] Therefore, by precisely controlling the particle size ratio of sodium peroxide particles, marine medicinal herbs, and calcium chloride powder, this invention not only achieves a stable oxygen supply but also improves the wearing comfort of the mask, providing the wearer with safer and more reliable protection.

[0029] According to a second aspect of the present invention, a method for preparing the above-mentioned oxygen crystal material is provided, comprising the following steps: S1: After seaweed pretreatment, seaweed powder is obtained; S2: Place the seaweed powder in an acidic solution, heat and stir to obtain an acid hydrolysate; S3: Filter the acid hydrolysate to obtain a filtrate, then place the filtrate in an ethanol solution for precipitation and centrifugation to obtain alginic acid precipitate; S4: After washing and drying the alginic acid precipitate, alginic acid powder is obtained; S5: The alginate powder, calcium chloride powder and sodium peroxide particles are placed in a stirrer and stirred to obtain oxygen crystal material.

[0030] In an optional embodiment of the present invention, step S1 includes the following preprocessing: The seaweed plants are washed, dried, and then ground to obtain seaweed powder. The drying conditions include: a temperature of 40-60℃ (e.g., 45℃, 50℃, 55℃, etc.), a time of 24-48h (e.g., 30h, 35h, 40h, 45h, etc.), and a humidity of 40-60% (e.g., 45%, 50%, 55%, etc.). The average particle size of the seaweed powder is 1-3 mm (e.g., 1.5 mm, 2 mm, 2.5 mm, etc.).

[0031] Specifically, fresh seaweed, such as kelp and nori, is selected as the raw material for preparing alginic acid.

[0032] Further steps include cleaning and drying: The collected seaweed is thoroughly cleaned to remove impurities such as sand and shells from its surface. The cleaned seaweed is then dried. Drying temperature is a key factor affecting the drying effect; the optimal temperature range is 40-60 degrees Celsius. This range facilitates rapid evaporation of water vapor while preventing excessive loss of nutrients. The humidity in the drying chamber should be maintained between 40% and 60%. Appropriate humidity promotes smooth water vapor evaporation and prevents clumping on the seaweed surface. Drying time is another important factor. Too short a drying time prevents complete evaporation of water vapor, while too long a drying time may lead to nutrient loss and a decline in seaweed quality.

[0033] Grinding: The dried seaweed is ground using a pulverizing device with dust recovery to ensure operational safety and reduce dust generation; the ground seaweed powder is then sterilized using an instantaneous high-temperature sterilization device to improve the safety of the seaweed powder and extend its shelf life.

[0034] As an optional embodiment of the present invention, in step S2, the acidic solution includes one or more of hydrochloric acid or sulfuric acid; The concentration of the acidic solution is 1-3% (e.g., 1.5%, 2%, 2.5%, etc.). The conditions for heating and stirring include: The temperature is 60-90℃ (e.g., 65℃, 70℃, 75℃, 80℃, 85℃, etc.), and the time is 30-60min (35min, 40min, 45min, 50min, 55min, etc.).

[0035] Specifically, acid hydrolysis using acidic solutions such as hydrochloric acid or sulfuric acid can effectively extract alginic acid from seaweed. At the same time, optimizing the concentration of the acidic solution and the heating and stirring conditions makes the extraction process more efficient.

[0036] In an optional embodiment of the present invention, in step S3, the concentration of the ethanol solution is 60-75%, preferably 75%; The volume ratio of the ethanol solution to the filtrate is (1-2):1; Specifically, the solubility of sodium alginate is reduced by controlling the concentration of ethanol, thereby causing precipitation. In an ethanol solution, ethanol molecules interact with sodium alginate molecules, altering the spatial structure of the sodium alginate molecules. This weakens the intermolecular attraction between sodium alginate molecules, leading to a decrease in solubility. Therefore, the higher the ethanol concentration, the stronger the interaction between ethanol and sodium alginate molecules, and the lower the solubility of sodium alginate. However, as the ethanol concentration increases, the precipitation rate accelerates, causing alginate molecules to fail to fully interact and aggregate, resulting in a non-uniform precipitate.

[0037] In step S3, the precipitation time is 1-2 hours; In step S3, the centrifugation rate is 7000-8000 r / min, and the time is 3-5 min; In an optional embodiment of the present invention, in step S4, the detergent for washing is the ethanol solution described in step S3; In step S4, the drying conditions include: The drying temperature is 50-70℃, preferably 60℃, and the drying time is 4-8h, preferably 6h.

[0038] In an optional embodiment of the present invention, the conditions of the stirrer in step S5 include: The stirring speed is 200-400 r / min, and the stirring time is 15-30 min.

[0039] Specifically, the stirring environment in step S5 needs to be strictly sealed and dried in order to prevent moisture in the air from coming into contact with alginic acid powder, calcium chloride powder and sodium peroxide particles and avoid chemical reactions. Therefore, in step S5 of this invention, a sealed stirrer is used, and the stirring chamber of the stirrer needs to be dried at 20-35°C before stirring. The oxygen crystal material obtained after stirring needs to be sealed and stored at room temperature to prevent moisture from entering.

[0040] According to a third aspect of the present invention, an application is provided of the oxygen crystal material as described above or the oxygen crystal material prepared by the method described above, wherein the oxygen crystal material can be used as the contents of an oxygen crystal box for the preparation of an oxygen-generating mask.

[0041] Specifically, the oxygen crystal material provided by this invention, as the contents of an oxygen crystal box, has broad application prospects in the preparation of oxygen-generating masks. Furthermore, sodium peroxide, calcium chloride, and alginate are all inexpensive and readily available materials, resulting in a lower manufacturing cost for the oxygen crystal material provided by this invention. This allows it to be used as an upgrade to everyday protective masks, providing the public with a healthier and more comfortable breathing environment.

[0042] The present invention will now be described in further detail with reference to specific embodiments and comparative examples.

[0043] All raw materials involved in this invention are commercially available.

[0044] Example 1 S1: After seaweed pretreatment, seaweed powder is obtained; Select fresh kelp and wash it thoroughly to remove impurities such as sand and shells attached to the surface of the kelp. Then, dry the cleaned kelp at a temperature of 50℃ and a humidity of 55% for 30 hours. Then, put the dried kelp into a pulverizer with dust collection and pulverize it. Then, use an instant high temperature sterilization device to sterilize it to obtain seaweed powder with an average particle size of 2mm. S2: Place the seaweed powder in an acidic solution, heat and stir to obtain an acid hydrolysate; Seaweed powder was placed in a 2% hydrochloric acid / sulfuric acid mixed solution and stirred for 40 minutes at 80°C to obtain an acid hydrolysate. S3: Filter the acid hydrolysate to obtain a filtrate, then place the filtrate in an ethanol solution for precipitation, and then centrifuge to obtain alginic acid precipitate; The acid hydrolysate was filtered, and the obtained filtrate was placed in a 75% ethanol solution for precipitation for 2 hours (the volume ratio of ethanol solution to filtrate was 2:1). Then, it was placed in a centrifuge and centrifuged at 8000 r / min for 3 minutes to obtain alginate precipitate. S4: After washing and drying the alginic acid precipitate, alginic acid powder is obtained; Wash the alginic acid precipitate 3-5 times with 75% ethanol solution, then place it in a drying oven and dry it at 60℃ for 6 hours to obtain alginic acid powder. S5: The alginate powder, calcium chloride powder and sodium peroxide particles are placed in a stirrer and stirred to obtain oxygen crystal material.

[0045] After drying the mixing chamber of the sealed stirrer at 30°C, 40% alginate powder (average particle size of 50 μm), 20% calcium chloride powder (average particle size of 10 μm), and 40% sodium peroxide particles (average particle size of 300 μm) were placed in the sealed stirrer and stirred at a speed of 300 r / min for 30 min to obtain oxygen crystal material.

[0046] The performance data of the oxygen crystal material prepared in this embodiment are shown in Table 1.

[0047] Example 2 S1: After seaweed pretreatment, seaweed powder is obtained; Select fresh kelp and wash it thoroughly to remove impurities such as sand and shells attached to the surface of the kelp. Then, dry the cleaned kelp at a temperature of 40℃ and a humidity of 60% for 24 hours. Then, put the dried kelp into a pulverizer with dust collection and pulverize it. Then, use an instant high temperature sterilization device to sterilize it to obtain seaweed powder with an average particle size of 3mm. S2: Place the seaweed powder in an acidic solution, heat and stir to obtain an acid hydrolysate; Seaweed powder was placed in a 1% hydrochloric acid solution and stirred for 60 minutes at 60°C to obtain an acid hydrolysate. S3: Filter the acid hydrolysate to obtain a filtrate, then place the filtrate in an ethanol solution for precipitation, and then centrifuge to obtain alginic acid precipitate; The acid hydrolysate was filtered, and the obtained filtrate was placed in a 75% ethanol solution for precipitation for 2 hours (the volume ratio of ethanol solution to filtrate was 2:1). Then, it was placed in a centrifuge and centrifuged at 8000 r / min for 3 minutes to obtain alginate precipitate. S4: After washing and drying the alginic acid precipitate, alginic acid powder is obtained; Wash the alginic acid precipitate 3-5 times with 75% ethanol solution, then place it in a drying oven and dry it at 50℃ for 8 hours to obtain alginic acid powder. S5: The alginate powder, calcium chloride powder and sodium peroxide particles are placed in a stirrer and stirred to obtain oxygen crystal material.

[0048] After drying the mixing chamber of the sealed stirrer at 30°C, 30% alginate powder (average particle size 90 μm), 30% calcium chloride powder (average particle size 15 μm), and 40% sodium peroxide particles (average particle size 450 μm) were placed in the sealed stirrer and stirred at a speed of 400 r / min for 15 min to obtain oxygen crystal material.

[0049] The performance data of the oxygen crystal material prepared in this embodiment are shown in Table 1.

[0050] Example 3 S1: After seaweed pretreatment, seaweed powder is obtained; Select fresh kelp and wash it thoroughly to remove impurities such as sand and shells from its surface. Then, dry the cleaned kelp at a temperature of 60°C and a humidity of 40% for 48 hours. Next, place the dried kelp in a pulverizer with dust collection and pulverize it. Then, sterilize it using an instant high-temperature sterilization device to obtain seaweed powder with an average particle size of 1 mm. S2: Place the seaweed powder in an acidic solution, heat and stir to obtain an acid hydrolysate; Seaweed powder was placed in a 3% sulfuric acid solution and stirred for 30 minutes at 90°C to obtain an acid hydrolysate. S3: Filter the acid hydrolysate to obtain a filtrate, then place the filtrate in an ethanol solution for precipitation, and then centrifuge to obtain alginic acid precipitate; The acid hydrolysate was filtered, and the obtained filtrate was placed in a 75% ethanol solution for precipitation for 2 hours (the volume ratio of ethanol solution to filtrate was 1.5:1). Then, it was placed in a centrifuge and centrifuged at 7000 r / min for 5 minutes to obtain alginate precipitate. S4: After washing and drying the alginic acid precipitate, alginic acid powder is obtained; Wash the alginic acid precipitate 3-5 times with 75% ethanol solution, then place it in a drying oven and dry it at 70℃ for 4 hours to obtain alginic acid powder. S5: The alginate powder, calcium chloride powder and sodium peroxide particles are placed in a stirrer and stirred to obtain oxygen crystal material.

[0051] After drying the mixing chamber of the sealed stirrer at 30°C, 35% alginate powder (average particle size 100 μm), 15% calcium chloride powder (average particle size 25 μm), and 50% sodium peroxide particles (average particle size 500 μm) were placed in the sealed stirrer and stirred at a speed of 400 r / min for 30 min to obtain oxygen crystal material.

[0052] The performance data of the oxygen crystal material prepared in this embodiment are shown in Table 1.

[0053] Example 4 S1: After seaweed pretreatment, seaweed powder is obtained; Select fresh kelp and wash it thoroughly to remove impurities such as sand and shells attached to the surface of the kelp. Then, dry the cleaned kelp at a temperature of 50℃ and a humidity of 50% for 40 hours. Then, put the dried kelp into a pulverizer with dust collection and pulverize it. Then, use an instant high temperature sterilization device to sterilize it to obtain seaweed powder with an average particle size of 2mm. S2: Place the seaweed powder in an acidic solution, heat and stir to obtain an acid hydrolysate; Seaweed powder was placed in a 2% hydrochloric acid / sulfuric acid solution and stirred for 50 minutes at 70°C to obtain an acid hydrolysate. S3: Filter the acid hydrolysate to obtain a filtrate, then place the filtrate in an ethanol solution for precipitation (the volume ratio of ethanol solution to filtrate is 1:1), and then centrifuge to obtain alginic acid precipitate; The acid hydrolysate was filtered, and the obtained filtrate was placed in a 75% ethanol solution for precipitation for 2 hours. Then it was placed in a centrifuge and centrifuged at 7000 r / min for 4 min to obtain alginate precipitate. S4: After washing and drying the alginic acid precipitate, alginic acid powder is obtained; Wash the alginic acid precipitate 3-5 times with 75% ethanol solution, then place it in a drying oven and dry it at 60℃ for 7 hours to obtain alginic acid powder. S5: The alginate powder, calcium chloride powder and sodium peroxide particles are placed in a stirrer and stirred to obtain oxygen crystal material.

[0054] After drying the mixing chamber of the sealed stirrer at 30°C, 30% alginate powder (average particle size 70 μm), 30% calcium chloride powder (average particle size 10 μm), and 40% sodium peroxide particles (average particle size 300 μm) were placed in the sealed stirrer and stirred at a speed of 400 r / min for 30 min to obtain oxygen crystal material.

[0055] The performance data of the oxygen crystal material prepared in this embodiment are shown in Table 1.

[0056] Comparative Example 1 The difference between this comparative example and Example 1 is that calcium chloride powder and alginate powder are not added; the remaining operating steps and technical parameters are the same as in Example 1.

[0057] The performance data of the oxygen crystal material prepared in this comparative example are shown in Table 1.

[0058] Comparative Example 2 The difference between this comparative example and Example 1 is that the particle size of sodium peroxide particles: the particle size of alginate powder: the particle size of calcium chloride powder = 1:1:1. All other operating steps and technical parameters are the same as in Example 1.

[0059] The performance data of the oxygen crystal material prepared in this comparative example are shown in Table 1.

[0060] Performance Comparison The performance testing method used in this invention is as follows: The method combines a breathing simulator (models: Phison and HRH-BRM-2100), a gas analyzer (model: KE-210), and a humidity meter (model: CEM DT-625). The breathing simulator simulates the actual human breathing process, and gas samples are sent to the gas analyzer and humidity meter for measurement.

[0061] Record the initial oxygen concentration and initial water vapor concentration as 0%VOL and 0mg / m³, respectively, and record the changes in oxygen concentration and water vapor concentration over a period of 10-120 minutes.

[0062] The performance of the oxygen crystal materials prepared in Examples 1-4 and Comparative Examples 1-2 was tested, and the results are shown in Table 1: Table 1 As shown in Table 1, when the oxygen crystal material provided by the present invention is used as the contents of the oxygen crystal box to prepare oxygen-generating masks, it can stably release oxygen within 10-120 minutes and stably maintain the water vapor concentration at a low level, thus achieving excellent oxygen generation and dehumidification effects.

[0063] As shown in Table 1, compared with Example 1 of the present invention, since no calcium chloride powder and alginate powder were added in Comparative Example 1, sodium peroxide reacted violently when it came into contact with water vapor in exhaled gas, releasing a large amount of oxygen within 10-30 minutes. However, as time went on, the oxygen concentration began to decrease because the violent reaction of sodium peroxide caused its content to decrease sharply, resulting in a gradual decrease in oxygen concentration within 90-120 minutes.

[0064] As shown in Table 1, compared with Example 1 of the present invention, Comparative Example 2 has the same particle size of sodium peroxide, alginate powder and calcium chloride powder. Therefore, the contact between sodium peroxide and water vapor is insufficient, resulting in a slower rate of oxygen generation.

[0065] In summary, the oxygen crystal material introduced in this invention exhibits superior performance when used as the content of an oxygen crystal box in the preparation of oxygen-generating masks. Specifically, during breathing, the oxygen crystal material can stably and continuously release oxygen over a period of 10-120 minutes, maintaining a relatively stable rate throughout this time. This indicates that whether at the initial stage of wearing the oxygen-generating mask or at the end of prolonged wear, the wearer can obtain a stable and sufficient oxygen supply, thus ensuring the high efficiency and reliability of the oxygen-generating mask. Furthermore, while releasing oxygen, the oxygen crystal material can also stably maintain a low water vapor concentration. This is particularly important in humid environments, as excessively high water vapor concentrations not only affect the comfort of the mask but may also affect the purity and transmission efficiency of the oxygen. The oxygen crystal material of this invention effectively solves this problem through its unique moisture-absorbing properties, allowing the wearer to enjoy a continuous oxygen supply while maintaining a dry and comfortable environment.

[0066] The oxygen crystal material provided by this invention exhibits excellent oxygen generation and dehumidification properties in the preparation of oxygen-generating masks. It not only stably releases oxygen, providing a sustained oxygen supply for the wearer, but also effectively controls water vapor concentration, maintaining a dry and comfortable environment, thus paving a new path for the future development of oxygen-generating masks.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An oxygen crystal material, characterized in that, By mass percentage, it includes the following components: Sodium peroxide granules 30-50%, calcium chloride powder 10-30%, and alginate powder 20-40%; The sodium peroxide particles have a particle size of 200-500 μm; The alginate powder has a particle size of 50-100 μm; The particle size of the calcium chloride powder is 10-25 μm; The particle size of the sodium peroxide particles: the particle size of the alginate powder: the particle size of the calcium chloride powder = (10-30):(2-10):

1.

2. A method for preparing the oxygen crystal material as described in claim 1, characterized in that, Includes the following steps: S1: After seaweed pretreatment, seaweed powder is obtained; S2: Place the seaweed powder in an acidic solution, heat and stir to obtain an acid hydrolysate; S3: Filter the acid hydrolysate to obtain a filtrate, then place the filtrate in an ethanol solution for precipitation and centrifugation to obtain alginic acid precipitate; S4: After washing and drying the alginic acid precipitate, alginic acid powder is obtained; S5: The alginate powder, calcium chloride powder and sodium peroxide particles are placed in a stirrer and stirred to obtain oxygen crystal material.

3. The method for preparing the oxygen crystal material according to claim 2, characterized in that, In step S1, the preprocessing includes: The seaweed plants are washed, dried, and then ground to obtain seaweed powder. The drying conditions include: a temperature of 40-60℃, a time of 24-48 hours, and a humidity of 40-60%. The average particle size of the seaweed powder is 1-3 mm.

4. The method for preparing the oxygen crystal material according to claim 2, characterized in that, In step S2, the acidic solution includes one or more of hydrochloric acid or sulfuric acid; The concentration of the acidic solution is 1-3%; The conditions for heating and stirring include: The temperature is 60-90℃, and the time is 30-60 minutes.

5. The method for preparing the oxygen crystal material according to claim 2, characterized in that, In step S3, the concentration of the ethanol solution is 60-75%; The volume ratio of the ethanol solution to the filtrate is (1-2):1; In step S3, the precipitation time is 1-2 hours; In step S3, the centrifugation rate is 7000-8000 r / min and the time is 3-5 min.

6. The method for preparing the oxygen crystal material according to claim 2, characterized in that, In step S4, the detergent used for washing is the ethanol solution described in step S3; In step S4, the drying conditions include: The drying temperature is 50-70℃, and the drying time is 4-8 hours.

7. The method for preparing the oxygen crystal material according to claim 2, characterized in that, In step S5, the conditions for the stirrer include: The stirring speed is 200-400 r / min, and the stirring time is 15-30 min.

8. The application of an oxygen crystal material prepared by the method for preparing an oxygen crystal material as described in claim 1 or as described in any one of claims 2-7, characterized in that, The oxygen crystal material can be used as the contents of an oxygen crystal box to prepare oxygen-generating masks.

Images