Chlorine dioxide sustained-release product, and preparation method therefor and use thereof
By filling the gaps in chlorine dioxide powder with solid colloids and wrapping it with a waterproof and breathable membrane, the problem of chlorine dioxide instability in water is solved, achieving a long-term slow-release effect, and making it suitable for stable release in air and water.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-11-19
- Publication Date
- 2026-05-28
AI Technical Summary
The existing chlorine dioxide is unstable in water, which limits its application in aqueous solutions. Furthermore, there is a lack of technology for long-term slow-release single products, and the equipment cost is high, making it difficult to adopt in small-scale sites.
A waterproof and breathable slow-release product is formed by filling the gaps in chlorine dioxide powder with a solid colloid and wrapping it with a solid colloid film. The colloid film creates water vapor channels to achieve a slow and continuous reaction.
At room temperature, it achieves long-term stable release of chlorine dioxide in water and air, avoiding dissolution and leaching, providing a more convenient application method, and facilitating transportation and storage.
Smart Images
Figure CN2025135991_28052026_PF_FP_ABST
Abstract
Description
A Chlorine Dioxide Slow-Release Product, Its Preparation Method and Application
[0001] Cross-references to related applications
[0002] This application claims priority to Chinese Patent Application No. 2024116546620, filed on November 19, 2024, entitled "A Chlorine Dioxide Slow-Release Product and Its Preparation Method and Application", the entire contents of which are incorporated herein by reference. Technical Field
[0003] This disclosure relates to the field of chlorine dioxide gas slow-release materials technology, and more specifically, to a chlorine dioxide slow-release product, its preparation method, and its application. Background Technology
[0004] Chlorine dioxide is widely used in production and daily life due to its advantages. However, its instability and tendency to decompose in water limit its application in aqueous solutions. It is generally prepared on demand, typically in binary synthetic liquid, powder, and mono-powder or tablet form. However, the remaining solution is difficult to preserve, leading to material waste and environmental pollution. Furthermore, automated synthesis equipment is often used in locations requiring long-term application, but this equipment is expensive and difficult to implement in small-scale facilities.
[0005] Currently, there is still a gap in the field of stable synthesis of sustained-release chlorine dioxide products in water for extended periods (at least 15 days) without the aid of equipment.
[0006] In view of this, this disclosure is hereby made.
[0007] Public content
[0008] The purpose of this disclosure is to provide a chlorine dioxide sustained-release product, its preparation method, and its application, in order to solve or improve the above-mentioned technical problems.
[0009] This disclosure can be implemented as follows:
[0010] In a first aspect, this disclosure provides a chlorine dioxide slow-release product, which includes a main structure and a film;
[0011] The main structure includes a solid colloid and a chlorine dioxide preparation powder; the solid colloid fills the gaps between at least some of the adjacent chlorine dioxide preparation powder particles to solidify and encapsulate the chlorine dioxide preparation powder particles that form the gaps.
[0012] The adhesive film covers at least part of the surface of the main structure.
[0013] In an optional embodiment, the raw material for preparing the solid colloid is a liquid colloid.
[0014] In an optional embodiment, the liquid colloid includes liquid silicone.
[0015] In an optional embodiment, the mass percentage of chlorine dioxide in the chlorine dioxide powder preparation is 6% to 12%.
[0016] In an optional embodiment, the mass percentage of chlorine dioxide in the chlorine dioxide powder preparation is 8% to 10%.
[0017] In an optional embodiment, the mass ratio of chlorine dioxide powder to liquid colloid is from 1:0.01 to 1:100.
[0018] In an optional embodiment, the mass of the liquid colloid is 1 / 4 to 5 times the mass of the chlorine dioxide powder.
[0019] In an optional embodiment, the mass ratio of the liquid colloid to the chlorine dioxide powder is 1:2.
[0020] Secondly, this disclosure provides a method for preparing a chlorine dioxide sustained-release product as described in any of the foregoing embodiments, comprising the following steps: encapsulating and sealing at least a portion of the surface of a mixture obtained by mixing a chlorine dioxide powder with a liquid colloid using an adhesive film, and then curing it.
[0021] In an optional embodiment, the mixture obtained by mixing the powder prepared from chlorine dioxide with the liquid colloid is injected into an open container, and the surface of the mixture at the opening of the container is wrapped and sealed with a film and then cured.
[0022] In an optional implementation, the container is made of antioxidant plastic.
[0023] In an optional embodiment, the antioxidant plastic includes at least one of PP, ABS and PVC.
[0024] In an optional embodiment, the adhesive film is a waterproof and breathable membrane.
[0025] In an optional embodiment, the waterproof and breathable membrane may be made of silicone, polytetrafluoroethylene, or PE.
[0026] In an optional embodiment, the waterproof and breathable membrane is a silicone membrane.
[0027] In an optional implementation, the thickness of the adhesive film does not exceed 50 mm.
[0028] In an optional embodiment, the thickness of the adhesive film is 0.005 mm to 50 mm.
[0029] In an optional embodiment, the thickness of the adhesive film is 0.1 mm.
[0030] Thirdly, this disclosure provides an application of the chlorine dioxide slow-release product as described in any of the foregoing embodiments for the slow-release of chlorine dioxide in air.
[0031] Fourthly, this disclosure provides an application of a chlorine dioxide slow-release product as described in any of the foregoing embodiments in the slow-release of chlorine dioxide in water.
[0032] The beneficial effects of this disclosure include:
[0033] This disclosure employs a solid, deep, uniform micro-segmentation (solid colloid uniformly filling the gaps in the powder) layered encapsulation and fixation method. This ensures that the raw materials encapsulated in the layered micro-segments, upon contact with water vapor, maintain the concentration required for the reaction while allowing for a uniform, slow, and sustained long-lasting reaction. The sustained-release product obtained by combining the main structure with the film can achieve long-term, relatively stable synthesis and release of chlorine dioxide in water and air at room temperature, filling the gap in the long-term sustained-release synthesis of chlorine dioxide monomer products in water. Furthermore, this method utilizes a physical approach without adding other chemical components. The selected encapsulation material (film) is insoluble in water and possesses waterproof and breathable physical properties, effectively preventing the dissolution and seepage of soluble components within the main structure. Theoretically, this can produce a relatively clean chlorine dioxide aqueous solution, minimizing the generation of other pollutants and harmful substances, facilitating transportation and storage, and providing a more convenient pathway for the application of chlorine dioxide. In practical use, by adding the corresponding unit product as needed, chlorine dioxide can be easily and stably synthesized in air and water for extended periods, facilitating the safe and efficient application of chlorine dioxide sustained-release gas and aqueous solutions. Attached Figure Description
[0034] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0035] Figure 1 is a physical image of the chlorine dioxide slow-release product provided in Example 1;
[0036] Figure 2 is a cross-sectional view of the chlorine dioxide slow-release product provided in Example 1;
[0037] Figure 3 is a microscopic view of a certain region in Figure 2;
[0038] Figure 4 shows the chlorine dioxide release results of each sample in the test example. Detailed Implementation
[0039] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions in the embodiments of this disclosure will be clearly and completely described below. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased commercially.
[0040] The following provides a detailed description of the chlorine dioxide sustained-release product, its preparation method, and its application.
[0041] This disclosure provides a chlorine dioxide sustained-release product, which includes a main structure and a film.
[0042] The main structure includes a solid colloid and a chlorine dioxide preparation powder; the solid colloid fills the gaps between at least some of the adjacent chlorine dioxide preparation powder particles to solidly segment and encapsulate the chlorine dioxide preparation powder particles that form the gaps.
[0043] The adhesive film covers at least part of the surface of the main structure.
[0044] In some optional embodiments, all chlorine dioxide powder particles may be separated by solid colloids to achieve separation between the powder particles, and individual chlorine dioxide powder particles may be fixed by the solid colloids. In this method, the solid colloids can fill the gaps between the chlorine dioxide powder particles, forming solid micro-segments that are layered and fixed, and the solid colloids (such as waterproof and breathable solid silicone) create moisture channels to connect the segmented chlorine dioxide powder particles layer by layer. In other optional embodiments, a small portion of the chlorine dioxide powder particles may not be filled with solid colloids. Comparatively, the method of filling all chlorine dioxide powder particles with solid colloids results in a more stable and long-lasting sustained-release effect of chlorine dioxide.
[0045] It should be noted that current slow-release chlorine dioxide materials typically employ either encapsulation of the entire surface of the chlorine dioxide powder or encapsulation with liquid colloids. As these materials continuously absorb moisture, the internal accumulation of water leads to a rapid, geometrical increase in the reaction rate in the former case, and a decrease in colloid concentration and relative solution concentration inhibition in the latter, resulting in accelerated reactions. Ultimately, both methods result in poor stability of the slow-release chlorine dioxide synthesis. This disclosure, however, utilizes a solid, deep, uniform micro-segmentation (solid colloid uniformly filling the gaps in the powder) for layered encapsulation and fixation. This ensures that the micro-encapsulated raw materials, upon contact with moisture, maintain the concentration required for the reaction while also ensuring a uniform, slow, and long-lasting reaction.
[0046] The main ingredients for preparing the above-mentioned chlorine dioxide powder include sodium chlorite and solid acid. In actual use, either monovalent or binary chlorine dioxide powder can be used.
[0047] In some alternative embodiments, all surfaces of the main structure may be covered with an adhesive film. In other alternative embodiments, only some surfaces of the main structure may be covered with an adhesive film, while the remaining uncovered surfaces remain sealed.
[0048] In this disclosure, the raw material for preparing the solid colloid is a liquid colloid, which can be exemplarily liquid silica gel. The aforementioned liquid silica gel has strong oxidation resistance and, after curing, possesses a certain degree of waterproof and breathable properties. By mixing the liquid silica gel with a chlorine dioxide powder preparation agent, the chlorine dioxide powder particles can be encapsulated by the liquid silica gel, and then cured to form the aforementioned main structure.
[0049] The hardness range of liquid silicone can be below 30 degrees, preferably near 0 degrees. If the hardness of the liquid silicone is low, the binding force of the solid colloid it forms is weaker, which leads to poorer waterproofing due to pressure stretching, increased water vapor penetration, and a poorer chlorine dioxide slow-release effect.
[0050] In some optional embodiments, the mass ratio of chlorine dioxide powder to liquid colloid can be from 1:0.01 to 1:100, such as 1:0.01, 1:0.1, 1:1, 1:2, 1:5, 1:10, 1:20, 1:40, 1:60, 1:80, or 1:100, or other values within the range of 1:0.01 to 1:100. In some more typical embodiments, the mass of the liquid colloid is 1 / 4 to 5 times the mass of the chlorine dioxide powder. In some even more typical embodiments, the mass ratio of the liquid colloid to the chlorine dioxide powder is 1:2.
[0051] The mass percentage of chlorine dioxide contained in the above-mentioned chlorine dioxide powder preparation can be 6% to 12%, such as 6%, 7%, 8%, 9%, 10%, 11%, or 12%. In some more typical embodiments, the mass percentage of chlorine dioxide contained in the chlorine dioxide powder preparation is 8% to 10%.
[0052] Accordingly, this disclosure also provides a method for preparing the above-mentioned chlorine dioxide sustained-release product, comprising the following steps: encapsulating and sealing at least a portion of the surface of a mixture obtained by mixing chlorine dioxide powder and liquid colloid with an adhesive film, and then curing it.
[0053] The mixing of the chlorine dioxide powder and the liquid colloid was carried out under room temperature drying conditions. The chlorine dioxide powder and the liquid colloid were uniformly mixed in the mixture.
[0054] In some implementations, the adhesive film can be directly applied to seal all surfaces of the mixture and then cured to transform the liquid colloid into a solid colloid.
[0055] In other embodiments, the colloid obtained by mixing the powder prepared from chlorine dioxide with the liquid colloid can be injected into an open container, and the surface of the mixture at the opening of the container can be wrapped and sealed with a colloid film and then cured.
[0056] The container is made of antioxidant plastic, such as at least one of PP, ABS and PVC.
[0057] The aforementioned membrane is a waterproof and breathable membrane. The material of the waterproof and breathable membrane may include, for example, silicone, polytetrafluoroethylene (PTFE), or PE. In some preferred embodiments, the waterproof and breathable membrane is a silicone membrane.
[0058] In this disclosure, the thickness of the adhesive film does not exceed 50 mm. In some optional embodiments, the thickness of the adhesive film is 0.005 mm to 50 mm, such as 0.005 mm, 0.01 mm, 0.05 mm, 0.1 mm, 0.5 mm, 1 mm, 5 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, or 50 mm, or other values within the range of 0.005 mm to 50 mm. In some more typical embodiments, the thickness of the adhesive film is 0.1 mm.
[0059] The thickness of the membrane affects the air permeability. The thinner the membrane, the better the water vapor permeability and chlorine dioxide release performance. However, if the membrane is too thick, it is easy to cause insufficient water vapor penetration, resulting in insufficient water vapor required for the reaction and a slow reaction.
[0060] By using a waterproof and breathable membrane material of uniform thickness in conjunction with an open container for sealing, it is possible to achieve waterproofing underwater while allowing some water vapor to enter the main structure, creating a microenvironment rich in water vapor but not soaked in water, thereby achieving stable and slow release of chlorine dioxide.
[0061] As mentioned above, the preparation method of the chlorine dioxide product provided in this disclosure is simple and cost-controllable, and both the raw materials and the product are easy to transport and store.
[0062] The sustained-release principle of the chlorine dioxide sustained-release product prepared by the above method includes:
[0063] Regarding the mixture: chlorine dioxide powder particles are encapsulated and layered by a solid colloid formed by the solidification of liquid colloid. Due to the waterproof and breathable properties of the solid colloid, it can construct interconnected water vapor channels, allowing water vapor to contact the surface-encapsulated chlorine dioxide powder particles through these channels. This causes a reaction upon contact with the water vapor, generating chlorine dioxide gas, which is then released to the outside through the solid colloid. As water vapor further accumulates due to the reaction and penetration, exceeding the water vapor consumed by the internal desiccant (a component of the chlorine dioxide powder itself), the water vapor will further penetrate the next layer of waterproof and breathable material, triggering a reaction in the lower-layer encapsulated chlorine dioxide powder. This results in a slow and continuous release of the reaction. The deeper the chlorine dioxide powder layer, the more difficult it is for water vapor to penetrate, and the later the reaction occurs, as the channel length increases. When the ratio of solid colloid to chlorine dioxide in the powder preparation is small, the reaction retardation is insufficient to achieve long-term underwater sustained release under immersion conditions. While a larger ratio can achieve underwater reaction retardation, it results in low active ingredient density, large finished product volume, and poor reaction stability. Therefore, the ratio of solid colloid to chlorine dioxide in the powder preparation needs to be controlled within a suitable range.
[0064] After the mixture is encapsulated by the membrane: The mixture is encapsulated on its outer surface by a uniformly thick membrane with waterproof and breathable properties. In an underwater environment, it is waterproof while allowing some water vapor to enter, creating a microenvironment rich in water vapor but not soaked. A certain amount of water vapor comes into contact with the encapsulated mixture, causing the mixture to continuously and slowly generate chlorine dioxide gas, which is released into the water through the membrane due to the internal and external pressure difference. When the internal gas pressure is greater than the external pressure, the membrane mainly releases the generated chlorine dioxide gas outward, while the water vapor entry rate decreases. The water vapor that enters is not consumed by the reaction; on the contrary, more is generated as the reaction proceeds. However, the desiccant (such as anhydrous magnesium sulfate) in the chlorine dioxide powder preparation will absorb some moisture. Theoretically, using a membrane with better pressure resistance can achieve a more ideal release effect, such as a smoother and more stable release (manifested as a stable, approximately parallel, linear release data). As the consumption of raw materials increases and the difficulty of water vapor infiltration increases, the amount of gas produced decreases, the internal gas pressure drops, and external water vapor increases the infiltration rate, allowing a wider range of raw materials to participate in the reaction, thereby promoting gas production. Therefore, after fluctuations in release, the release rate will return to a stable state. Furthermore, this disclosure not only provides the application of the above-mentioned chlorine dioxide slow-release product in the slow-release of chlorine dioxide in air, but also provides the application of the above-mentioned chlorine dioxide slow-release product in the slow-release of chlorine dioxide in water.
[0065] The slow-release product disclosed herein can achieve long-term, relatively stable synthesis and release of chlorine dioxide in water and air at room temperature, filling the gap in the long-term slow-release synthesis of chlorine dioxide monomer products in water. Furthermore, this method employs a physical approach without adding other chemical components. The selected encapsulation material (film) is insoluble in water and possesses waterproof and breathable physical properties, effectively preventing the dissolution and seepage of soluble components within the main structure. Theoretically, this can produce a relatively clean chlorine dioxide aqueous solution, minimizing the generation of other pollutants and harmful substances, facilitating transportation and storage, and providing a more convenient pathway for the application of chlorine dioxide. In practical use, by adding the corresponding unit product as needed, chlorine dioxide can be easily and stably synthesized in air and water for extended periods, facilitating the safe and efficient application of chlorine dioxide slow-release gas and aqueous solutions. Moreover, the film thickness, the surface area of the film sealing the mixture, and the hardness of the solid colloid also affect the amount of water vapor penetration, thereby influencing the total duration of chlorine dioxide generation, the unit release amount, and the generation rate.
[0066] In some embodiments, the above-mentioned chlorine dioxide slow-release product can maintain a stable slow-release effect of chlorine dioxide in water for at least 20 days (up to 30 days or more).
[0067] The features and performance of this disclosure will be further described in detail below with reference to embodiments.
[0068] Example 1
[0069] This embodiment provides a chlorine dioxide sustained-release product, the preparation method of which is as follows:
[0070] Commercially available AB two-component liquid silica gel with a hardness of around 0 degrees (Shore A hardness) was mixed with component A to component B in a mass ratio of 1:1 to obtain silica gel stock solution.
[0071] Before the silica gel stock solution solidifies, 10g of silica gel stock solution is weighed and added to 20g of mono-component chlorine dioxide preparation powder (chlorine dioxide content approximately 8wt%) at a mass ratio of 1:2 to liquid colloid. The mixture is stirred until homogeneous and air bubbles are removed. The resulting mixture is then transferred to a cylindrical container (made of PP). After the mixture is evenly filled and the surface is smooth, a 0.1mm thick silica gel film is used to fully contact and seal the mixture. The mixture is then cured to obtain a slow-release chlorine dioxide product, designated as Test Sample 1. The film surface of this test sample has raised areas.
[0072] The physical image of the test specimen is shown in Figure 1, and its cross-sectional views are shown in Figures 2 and 3.
[0073] As can be seen from Figures 1 to 3, the solid colloid fills the gaps in the powder raw material, forming a solid micro-segmentation that is layered and fixed. The solid colloid also constructs water vapor channels to connect the segmented powder material layer by layer.
[0074] Example 2
[0075] The difference between this embodiment and Embodiment 1 is that the thickness of the silicone film is 0.5 mm.
[0076] The remaining conditions are the same as in Example 1.
[0077] The chlorine dioxide sustained-release product prepared in this embodiment is designated as test sample 2.
[0078] Example 3
[0079] The difference between this embodiment and Embodiment 1 is that the surface of the adhesive film is flat.
[0080] The chlorine dioxide slow-release product prepared in this embodiment is designated as test sample 3.
[0081] Example 4
[0082] The difference between this embodiment and Embodiment 1 is that: an airtight material is used to cover 50% of the container opening area, and a 0.1mm thick silicone film is used to fully contact and seal the mixture covering the remaining 50% area, followed by curing. The film surface is smooth.
[0083] The remaining conditions are the same as in Example 1.
[0084] The chlorine dioxide slow-release product prepared in this embodiment is designated as test sample 4.
[0085] Example 5
[0086] The difference between this embodiment and Example 1 is that a platinum catalyst (0.5 wt% of the silica gel stock solution) is added during the preparation of the silica gel source solution. The mass ratio of the silica gel source solution to the chlorine dioxide powder is 1:1, and both are 15 g.
[0087] The remaining conditions are the same as in Example 1.
[0088] The chlorine dioxide sustained-release product prepared in this embodiment is designated as test sample 5.
[0089] Example 6
[0090] The difference between this embodiment and Embodiment 1 is that: AB two-component liquid silica gel with a hardness of less than 0 degrees is mixed in a certain proportion to obtain silica gel stock solution.
[0091] The remaining conditions are the same as in Example 1.
[0092] The chlorine dioxide sustained-release product prepared in this embodiment is designated as test sample 6.
[0093] Example 7
[0094] This embodiment provides a chlorine dioxide sustained-release product, the preparation method of which is as follows:
[0095] Commercially available AB two-component liquid silica gel with a hardness of around 0 degrees (Shore A hardness) was mixed with component A to component B in a 1:1 mass ratio, and a platinum catalyst was added (0.5 wt% of the silica gel stock solution) to obtain the silica gel stock solution.
[0096] Before the silicone stock solution solidifies, weigh 20g of silicone stock solution and add 10g of mono-component chlorine dioxide preparation powder (chlorine dioxide content is about 8wt%) at a mass ratio of 1:2 between the mono-component chlorine dioxide preparation powder and the liquid colloid. Stir evenly and after the air bubbles are removed, transfer the mixture to a cylindrical container (PP material). After it is evenly filled and the surface is smooth, wrap and seal it with a 0.1mm thick silicone film that is in full contact with the mixture. Then solidify to obtain the chlorine dioxide slow-release product, which is recorded as test sample 7.
[0097] Example 8
[0098] This embodiment provides a chlorine dioxide sustained-release product, the preparation method of which is as follows:
[0099] Commercially available AB two-component liquid silica gel with a hardness of around 0 degrees (Shore A hardness) was mixed with component A to component B in a mass ratio of 1:1 to obtain silica gel stock solution.
[0100] Before the silica gel stock solution solidifies, weigh 10g of silica gel stock solution and add 20g of binary chlorine dioxide preparation powder (chlorine dioxide content is about 8wt%, and the binary chlorine dioxide preparation powder contains 4g of NaCl and anhydrous magnesium sulfate as buffers to slow down the reaction rate) at a mass ratio of 2:1 to the liquid colloid. Stir evenly and after the air bubbles are removed, transfer the mixture to a cylindrical container (PP material). After it is evenly filled and the surface is smooth, wrap and seal it with a 0.1mm thick silica gel film that is in full contact with the mixture. Then solidify to obtain the chlorine dioxide slow-release product, which is recorded as test sample 8.
[0101] Comparative Example 1
[0102] The difference between this comparative example and Example 1 is that after the mixture is uniformly filled into a cylindrical container and the surface is smooth, a liquid silica gel mixture with a hardness of less than 0 degrees is dripped onto the surface of the mixture. The container is then placed horizontally and allowed to naturally level out and fully cover the filled surface before curing to obtain a slow-release chlorine dioxide product. This is designated as test sample 9.
[0103] Comparative Example 2
[0104] The difference between this comparative example and Example 1 is that: A two-component liquid silicone with a hardness near 0 degrees is mixed in a specific ratio to obtain a silicone source liquid. The silicone film is fully in contact with the mixture and then sealed, but not cured. All other conditions are the same as in Example 1.
[0105] The chlorine dioxide slow-release product prepared in this comparative example is designated as test sample 10.
[0106] Test case
[0107] The test samples obtained in Examples 1-8 and Comparative Examples 1-2 were tested in the following manner to obtain chlorine dioxide release data at different times.
[0108] Experimental method: The test sample was placed in 200 mL of water, sealed and protected from light. Every 24 hours, the solution was transferred to a 250 mL volumetric flask, and then 200 mL of water was added back to the original container. The solution was then sealed and protected from light again. The concentration of the extracted solution was measured using the five-step iodine method (at room temperature). The experimental data and results are shown in Table 1 and Figure 4.
[0109] Table 1 Test Results
[0110] As can be seen from Table 1 and Figure 4:
[0111] The chlorine dioxide slow-release product provided in this embodiment can maintain a stable slow-release effect of chlorine dioxide in water for a long period of time. Furthermore, comparisons with test samples 1, 6, and others show that using a waterproof and breathable membrane to deform and constrain the surface of the main structure, or replacing it with a silicone membrane with one of higher hardness, can achieve better results.
[0112] In summary, the slow-release product provided in this disclosure can achieve long-term, relatively stable synthesis and release of chlorine dioxide in water and air at room temperature, filling the gap in the long-term slow-release synthesis of chlorine dioxide monomer products in water. Furthermore, this method employs a physical approach without adding other chemical components. The selected encapsulation material (film) is insoluble in water and possesses waterproof and breathable physical properties, effectively preventing the dissolution and seepage of soluble components within the main structure. Theoretically, this can produce a relatively clean chlorine dioxide aqueous solution, minimizing the generation of other pollutants and harmful substances, facilitating transportation and storage, and providing a more convenient pathway for the application of chlorine dioxide. In practical use, by adding the corresponding unit product as needed, chlorine dioxide can be easily and stably synthesized in air and water for extended periods, facilitating the safe and efficient application of slow-release chlorine dioxide gas and aqueous solutions.
[0113] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure. Industrial applicability
[0114] The slow-release product disclosed herein fills the gap in the long-term slow-release synthesis of chlorine dioxide monomer products in water. This method is less likely to generate other pollutants and harmful substances, and is easy to transport and store, providing a more convenient approach for the application of chlorine dioxide. In practical use, the corresponding unit product is added according to the requirements, and chlorine dioxide can be synthesized stably in air and water for a long time very conveniently, facilitating the safe and efficient application of chlorine dioxide slow-release gas and aqueous solution.
Claims
1. A chlorine dioxide slow-release product, characterized in that, The chlorine dioxide slow-release product includes a main structure and a film; The main structure includes a solid colloid and a chlorine dioxide preparation powder; the solid colloid fills the gaps between at least some of the adjacent chlorine dioxide preparation powder particles to solidify and encapsulate the chlorine dioxide preparation powder particles that form the gaps. The adhesive film is wrapped around at least a portion of the surface of the main structure.
2. The chlorine dioxide slow-release product according to claim 1, characterized in that, The raw material for preparing the solid colloid is a liquid colloid.
3. The chlorine dioxide slow-release product according to claim 2, characterized in that, The liquid colloid includes liquid silica gel.
4. The chlorine dioxide slow-release product according to any one of claims 1 to 3, characterized in that, In the preparation of the chlorine dioxide powder, the mass percentage of chlorine dioxide is 6% to 12%.
5. The chlorine dioxide slow-release product according to claim 4, characterized in that, In the preparation of the chlorine dioxide powder, the mass percentage of chlorine dioxide is 8% to 10%.
6. The chlorine dioxide slow-release product according to any one of claims 1 to 5, characterized in that, The mass ratio of the chlorine dioxide powder to the liquid colloid is from 1:0.01 to 1:
100.
7. The chlorine dioxide slow-release product according to any one of claims 1 to 6, characterized in that, The mass of the liquid colloid is 1 / 4 to 5 times the mass of the chlorine dioxide powder.
8. The chlorine dioxide slow-release product according to claim 7, characterized in that, The mass ratio of the liquid colloid to the chlorine dioxide powder is 1:
2.
9. A method for preparing a chlorine dioxide sustained-release product as described in any one of claims 1 to 8, characterized in that, Includes the following steps: At least a portion of the surface of a mixture obtained by mixing a powder made from chlorine dioxide with a liquid colloid is wrapped and sealed with an adhesive film, and then cured.
10. The preparation method according to claim 9, characterized in that, The mixture obtained by mixing the powder prepared from chlorine dioxide with the liquid colloid is injected into an open container, and the surface of the mixture at the opening of the container is wrapped and sealed with a film and then cured.
11. The preparation method according to claim 10, characterized in that, The container is made of antioxidant plastic.
12. The preparation method according to claim 11, characterized in that, The antioxidant plastic includes at least one of PP, ABS and PVC.
13. The preparation method according to any one of claims 9 to 12, characterized in that, The adhesive film is a waterproof and breathable membrane.
14. The preparation method according to claim 13, characterized in that, The waterproof and breathable membrane is made of materials including silicone, polytetrafluoroethylene, or PE.
15. The preparation method according to claim 14, characterized in that, The waterproof and breathable membrane is a silicone membrane.
16. The preparation method according to any one of claims 9 to 15, characterized in that, The thickness of the adhesive film does not exceed 50 mm.
17. The preparation method according to claim 16, characterized in that, The thickness of the adhesive film is 0.005mm to 50mm.
18. The preparation method according to claim 17, characterized in that, The thickness of the adhesive film is 0.1 mm.
19. The application of a chlorine dioxide slow-release product as described in any one of claims 1 to 8 in the slow-release of chlorine dioxide in air.
20. The application of a chlorine dioxide slow-release product as described in any one of claims 1 to 8 in the slow-release of chlorine dioxide in water.