Gellan gum-water-soluble cellulose antibacterial material, preparation method thereof and preservative film

Abstract

The application relates to the technical field of fresh-keeping materials, in particular to a glucosan-water-soluble cellulose antibacterial material and a preparation method and a fresh-keeping film thereof. The preparation method comprises the following steps: preparing a water-phase solution by using glucosan and water-soluble cellulose, wherein the mass concentration of the glucosan is 1.5-3.5%, and the mass concentration of the water-soluble cellulose is 1.0-2.5%; preparing an oil-phase solution by using an antibacterial agent and an emulsifier; adding the oil-phase solution into the water-phase solution and performing high-speed shearing emulsification to form a nano-emulsion; adding a crosslinking agent into the nano-emulsion to form a crosslinked emulsion with a reticular structure; and preparing the crosslinked emulsion into a slow-release capsule. The preparation method effectively wraps the antibacterial agent by using the mixed system of the glucosan and the water-soluble cellulose, and ensures that the antibacterial agent can be stably released.

Description

Technical Field

[0001] This invention relates to the field of preservation materials technology, and more specifically, to a glucomannan-water-soluble cellulose antibacterial material, its preparation method, and a preservation film. Background Technology

[0002] Food preservation methods typically include refrigeration, freezing, or vacuum packaging; while these methods can extend the shelf life of food to some extent, their effectiveness is limited, and food spoilage is still a common problem.

[0003] In order to further extend the shelf life of food, related technologies also use natural plant essential oils with good antibacterial and antioxidant properties in food preservation.

[0004] However, these natural plant essential oil antibacterial agents are volatile and unstable, making them difficult to use directly in food preservation and storage. Summary of the Invention

[0005] The purpose of this invention is to provide a glucomannan-water-soluble cellulose antibacterial material, its preparation method, and a food preservation film. The preparation method utilizes a mixture of glucomannan and water-soluble cellulose to effectively encapsulate the antibacterial agent and ensure its stable release, thereby improving and prolonging the antibacterial effect of the glucomannan-water-soluble cellulose antibacterial material. Furthermore, both glucomannan and water-soluble cellulose are biocompatible materials, ensuring the safety of the glucomannan-water-soluble cellulose antibacterial material. The food preservation film prepared from this glucomannan-water-soluble cellulose antibacterial material can be used for food preservation.

[0006] This invention is implemented as follows:

[0007] In a first aspect, the present invention provides a method for preparing a glucomannan-water-soluble cellulose antibacterial material, comprising:

[0008] An aqueous solution was prepared using glucomannan and water-soluble cellulose, wherein the mass concentration of glucomannan was 1.5-3.5% and the mass concentration of water-soluble cellulose was 1.0-2.5%.

[0009] Oil phase solutions were prepared using antibacterial agents and emulsifiers;

[0010] An oil phase solution is added dropwise to an aqueous phase solution and subjected to high-speed shear emulsification to form a nanoemulsion.

[0011] Adding a crosslinking agent to a nanoemulsion forms a crosslinked emulsion with a network structure.

[0012] Cross-linked emulsions were prepared into sustained-release capsules.

[0013] In an optional embodiment, the glucomannan has a mass concentration of 2.5% and the water-soluble cellulose has a mass concentration of 1.5%.

[0014] In an optional embodiment, the water-soluble cellulose includes at least one of hydroxyethyl cellulose, hydroxypropyl cellulose, methyl cellulose, hydroxypropyl methyl cellulose, carboxymethyl cellulose, sodium carboxymethyl cellulose, and polymeric quaternary ammonium salt-10.

[0015] In an optional embodiment, the emulsifier includes Tween 80, and the crosslinking agent includes at least one of calcium chloride solution and glutaraldehyde.

[0016] In an optional embodiment, the antibacterial agent includes at least one of eugenol, carvacrol, thymol, citral, cinnamaldehyde, vanillin, perillaldehyde, citronellol, cumin oil, and benzyl isothiocyanate.

[0017] In an optional embodiment, the method of adding a crosslinking agent to the nanoemulsion includes: adding the crosslinking agent dropwise to the nanoemulsion and stirring, and reacting at a temperature of 35-45°C.

[0018] In an optional embodiment, the method of preparing the crosslinked emulsion into a sustained-release capsule includes: spray drying the crosslinked emulsion.

[0019] In an optional embodiment, the inlet temperature of the spray dryer is 170-190℃, the outlet temperature is 80-90℃, the atomization pressure is 0.15-0.25MPa, and the feed rate is 4-6mL / min.

[0020] In an optional implementation, the rotation speed of high-speed shear emulsification is 10,000-15,000 rpm.

[0021] Secondly, the present invention provides a glucomannan-water-soluble cellulose antibacterial material, which is prepared by the preparation method of glucomannan-water-soluble cellulose antibacterial material according to any one of the foregoing embodiments.

[0022] Thirdly, the present invention provides a food preservation film, the raw materials for which include resin and the aforementioned glucomannan-water-soluble cellulose antibacterial material.

[0023] The beneficial effects of the preparation method of the glucomannan-water-soluble cellulose antibacterial material of the present invention include: the preparation method of the glucomannan-water-soluble cellulose antibacterial material provided in the embodiments of the present invention optimizes the ratio of glucomannan and water-soluble cellulose, effectively encapsulates the antibacterial agent, and ensures the stable release of the antibacterial agent, thereby improving and prolonging the antibacterial effect of the glucomannan-water-soluble cellulose antibacterial material. Furthermore, both glucomannan and water-soluble cellulose are biocompatible materials, ensuring the safety of the glucomannan-water-soluble cellulose antibacterial material.

[0024] The beneficial effects of the glucomannan-water-soluble cellulose antibacterial material of the present invention include: the glucomannan-water-soluble cellulose antibacterial material provided in the embodiments of the present invention utilizes glucomannan and water-soluble cellulose with optimized ratios, which improves the encapsulation effect of antibacterial agents and ensures the stable release of antibacterial components in the glucomannan-water-soluble cellulose antibacterial material; moreover, the glucomannan-water-soluble cellulose antibacterial material has good safety and can be used in food preservation and other fields.

[0025] The beneficial effects of the food preservation film of the present invention include: the raw materials for preparing the food preservation film provided in the embodiments of the present invention include resin and the aforementioned glucomannan-water-soluble cellulose antibacterial material, and the glucomannan-water-soluble cellulose antibacterial material is used to achieve long-term sustained release of antibacterial agent, so that the food preservation film has a long-term antibacterial and preservation effect. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention 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.

[0027] This disclosure provides a method for preparing a glucomannan-water-soluble cellulose antibacterial material, comprising: preparing an aqueous solution using glucomannan and water-soluble cellulose, wherein the mass concentration of glucomannan in the aqueous solution is 1.5-3.5% (e.g., 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, etc., not specifically limited herein), and the mass concentration of water-soluble cellulose in the aqueous solution is 1.0-2.5% (e.g., 1.0%, 1.5%, 2.0%, 2.5%, etc., not specifically limited herein); preparing an oil phase solution using an antibacterial agent and an emulsifier; adding the oil phase solution dropwise to the aqueous solution and performing high-speed shear emulsification to form a nanoemulsion; adding a crosslinking agent to the nanoemulsion to form a crosslinked emulsion with a network structure; and preparing the crosslinked emulsion into a sustained-release capsule.

[0028] Optimizing the ratio of glucomannan and water-soluble cellulose can effectively encapsulate antibacterial agents and ensure their stable release, thereby improving and prolonging the antibacterial effect of glucomannan-water-soluble cellulose antibacterial materials. Furthermore, both glucomannan and water-soluble cellulose are biocompatible materials, ensuring the safety of glucomannan-water-soluble cellulose antibacterial materials and making them suitable for applications such as food preservation.

[0029] Optionally, the mass concentration of glucomannan is 2.5%, and the mass concentration of water-soluble cellulose is 1.5%. Optimizing the ratio of glucomannan to water-soluble cellulose can further improve the encapsulation efficiency of the antibacterial agent, so that the encapsulation efficiency of the antibacterial agent can reach 85% or more, and long-term sustained release can be achieved.

[0030] Alternatively, glucomannan can be derived from konjac, locust bean gum, tara gum, etc., without specific limitations.

[0031] Optionally, the water-soluble cellulose includes at least one selected from hydroxyethyl cellulose, hydroxypropyl cellulose, methyl cellulose, hydroxypropyl methyl cellulose, carboxymethyl cellulose, sodium carboxymethyl cellulose, and polymeric quaternary ammonium salt-10. All of the above-mentioned water-soluble celluloses exhibit good biocompatibility and are used to prepare glucomannan-water-soluble cellulose antibacterial materials, ensuring the safety of these materials.

[0032] Optionally, the emulsifier includes Tween 80; the crosslinking agent includes at least one of calcium chloride solution and glutaraldehyde.

[0033] It should be noted that the concentrations of emulsifier, calcium chloride solution, and glutaraldehyde can be selected as needed. For example, the mass concentration of emulsifier can be 0.5-2%, the mass concentration of calcium chloride solution can be 4-6%, and the final volume percentage of glutaraldehyde in the crosslinked emulsion can be 0.5-2%, without specific limitations.

[0034] Optionally, the antibacterial agent includes at least one of eugenol, carvacrol, thymol, citral, cinnamaldehyde, vanillin, perillaldehyde, citronellol, cumin oil, and benzyl isothiocyanate. All of the above antibacterial agents are plant-based antibacterial essential oils. These plant-based antibacterial essential oils not only possess good antibacterial and antioxidant capabilities but also have sufficiently high safety. Furthermore, these plant-based antibacterial essential oils are volatile and can effectively evaporate to improve food preservation.

[0035] Optionally, the mass concentration of the antibacterial agent in the oil phase solution can be 3-7%, such as 3%, 4%, 5%, 6%, 7%, etc., without specific limitation.

[0036] Optionally, the method of adding a crosslinking agent to the nanoemulsion includes: adding the crosslinking agent dropwise to the nanoemulsion and stirring, reacting at a temperature of 35-45°C, for example: 35°C, 38°C, 40°C, 42°C, 45°C. Optimizing the temperature of the crosslinking reaction can ensure the stability and mechanical strength of the formed network structure, improve the encapsulation efficiency of the antibacterial agent, and ensure the stable release of the encapsulated antibacterial agent.

[0037] Optionally, a method for preparing a sustained-release capsule from a cross-linked emulsion includes spray drying the cross-linked emulsion. Spray drying is a simple and easy-to-operate method for preparing capsules, facilitating large-scale production.

[0038] Furthermore, the inlet temperature of the spray dryer is 170-190℃ (e.g., 170℃, 175℃, 180℃, 185℃, 190℃, etc., which are not specifically limited here), the outlet temperature is 80-90℃ (e.g., 80℃, 82℃, 85℃, 88℃, 90℃, etc., which are not specifically limited here), the atomization pressure is 0.15-0.25MPa (e.g., 0.15MPa, 0.18MPa, 0.20MPa, 0.25MPa, etc., which are not specifically limited here), and the feed rate is 4-6mL / min (e.g., 4mL / min, 5mL / min, 6mL / min, etc., which are not specifically limited here).

[0039] It should be noted that after the sustained-release capsules are prepared by spray drying, they can be sieved to select particles of the corresponding size for separate vacuum packaging.

[0040] Optionally, the rotation speed of high-speed shear emulsification is 10,000-15,000 rpm, such as 10,000 rpm, 12,000 rpm, 15,000 rpm, etc., without being specifically limited here.

[0041] This disclosure also provides a food preservation film, the raw materials of which include resin and a glucomannan-water-soluble cellulose antibacterial material prepared by the aforementioned method. The resin includes, but is not limited to, polyethylene (PE), polylactic acid (PLA), and polyvinylidene chloride (PVDC).

[0042] Optionally, the preparation method of the plastic wrap includes mixing resin and glucomannan-water-soluble cellulose antibacterial material, and then extruding the mixture using a twin-screw extruder to form a film.

[0043] Optionally, the mass percentage of glucomannan-water-soluble cellulose antibacterial material in the plastic wrap is 1-5%, such as 1%, 2%, 3%, 4%, 5%, etc., without specific limitation.

[0044] The present invention will be further described in detail below with reference to the embodiments.

[0045] Example 1

[0046] Prepare raw materials and equipment; Raw materials: konjac glucomannan (food grade, viscosity ≥30000mPa·s), hydroxypropyl cellulose (food grade, viscosity 100-300mPa·s), carvacrol essential oil, deionized water, Tween 80 (food grade), glutaraldehyde (analytical grade, used as a crosslinking agent); Equipment: high-speed shear emulsifier, constant temperature magnetic stirrer, spray dryer, vacuum packaging machine.

[0047] 1. Preparation of aqueous phase: Konjac glucomannan and hydroxypropyl cellulose were slowly added to deionized water and stirred at 60°C for 2 hours until completely dissolved to obtain a transparent and viscous aqueous solution, wherein the mass concentration of glucomannan was 2.5% and the mass concentration of cellulose was 1.5%.

[0048] 2. Oil phase preparation: Add carvacrol essential oil to Tween 80; stir at room temperature for 10 minutes to obtain a homogeneous oil phase solution, wherein the mass concentration of carvacrol essential oil is 5%.

[0049] 3. Emulsification: The oil phase solution is slowly added dropwise to the aqueous phase solution while emulsifying using a high-speed shear emulsifier; Emulsification conditions: 12000 rpm, 15 minutes; After emulsification, a milky white, semi-transparent nanoemulsion is obtained.

[0050] 4. Crosslinking: Slowly add glutaraldehyde solution to the emulsion until the volume percentage of glutaraldehyde reaches 0.5%, and stir until homogeneous; react at 40°C for 2 hours to form a crosslinked emulsion with a network structure.

[0051] 5. Spray drying: Transfer the cross-linked emulsion to a spray dryer for drying; Spray drying conditions: inlet temperature 180℃, outlet temperature 85℃, atomization pressure 0.2MPa, feed rate 5mL / min; Collect the dried powder.

[0052] 6. Sieving and Packaging: Use a 100-mesh sieve to sieve the dried powder; vacuum pack the sieved powder and store it away from light.

[0053] Example 2

[0054] 1. Preparation of aqueous phase: Glucomannan and carboxymethyl cellulose were slowly added to deionized water and stirred at 60°C for 2 hours until completely dissolved to obtain a transparent and viscous aqueous solution, wherein the mass concentration of glucomannan was 1.5% and the mass concentration of cellulose was 1.0%.

[0055] 2. Preparation of oil phase: Add cinnamaldehyde to Tween 80; stir at room temperature for 10 minutes to obtain a homogeneous oil phase solution, wherein the mass concentration of cinnamaldehyde is 3%.

[0056] 3. Emulsification: The oil phase solution is slowly added dropwise to the aqueous phase solution while emulsifying using a high-speed shear emulsifier; Emulsification conditions: 10,000 rpm, 15 minutes; After emulsification, a milky white, semi-transparent nanoemulsion is obtained.

[0057] 4. Crosslinking: Slowly add glutaraldehyde solution to the emulsion until the volume percentage of glutaraldehyde reaches 0.3%, and stir until homogeneous; react at 35°C for 2 hours to form a crosslinked emulsion with a network structure.

[0058] 5. Spray drying: Transfer the crosslinked emulsion to a spray dryer for drying; Spray drying conditions: inlet temperature 170℃, outlet temperature 80℃, atomization pressure 0.15MPa, feed rate 4mL / min; Collect the dried powder.

[0059] 6. Sieving and Packaging: Use a 100-mesh sieve to sieve the dried powder; vacuum pack the sieved powder and store it away from light.

[0060] Example 3

[0061] 1. Preparation of aqueous phase: Glucomannan and hydroxyethyl cellulose were slowly added to deionized water and stirred at 60°C for 2 hours until completely dissolved to obtain a transparent and viscous aqueous solution, wherein the mass concentration of glucomannan was 3.5% and the mass concentration of cellulose was 2.5%.

[0062] 2. Oil phase preparation: Add eugenol to Tween 80; stir at room temperature for 10 minutes to obtain a homogeneous oil phase solution, wherein the mass concentration of eugenol essential oil is 7%.

[0063] 3. Emulsification: The oil phase solution is slowly added dropwise to the aqueous phase solution while emulsifying using a high-speed shear emulsifier; Emulsification conditions: 15,000 rpm, 15 minutes; After emulsification, a milky white, semi-transparent nanoemulsion is obtained.

[0064] 4. Crosslinking: Slowly add glutaraldehyde solution to the emulsion until the volume percentage of glutaraldehyde reaches 0.5%, and stir evenly; react at 45°C for 2 hours to form a crosslinked emulsion with a network structure.

[0065] 5. Spray drying: Transfer the crosslinked emulsion to a spray dryer for drying; Spray drying conditions: inlet temperature 190℃, outlet temperature 90℃, atomization pressure 0.25MPa, feed rate 6mL / min; Collect the dried powder.

[0066] 6. Sieving and Packaging: Use a 100-mesh sieve to sieve the dried powder; vacuum pack the sieved powder and store it away from light.

[0067] Comparative Example 1

[0068] Comparative Example 1 is similar to Example 1, except that: the mass concentration of glucomannan is 1%, the mass concentration of cellulose is 0.5%; the crosslinking temperature is 50°C; and other process parameters are the same as in Example 1.

[0069] Comparative Example 2

[0070] Comparative Example 2 is similar to Example 1, except that: the mass concentration of glucomannan is 4%, the mass concentration of cellulose is 3%; the crosslinking temperature is 30°C; and other process parameters are the same as in Example 1.

[0071] Experimental Example 1

[0072] The particle size distribution of the sustained-release capsules of Examples 1-3 and Comparative Examples 1-2 was detected.

[0073] The particle size distribution of the sustained-release capsules was determined using a laser particle size analyzer. The results are shown in Table 1.

[0074] Experimental Example 2

[0075] The encapsulation efficiency of the sustained-release capsules in Examples 1-3 and Comparative Examples 1-2 was tested.

[0076] The content of antibacterial agent in sustained-release capsules was determined by high performance liquid chromatography (HPLC), and the encapsulation efficiency was calculated as follows: encapsulation efficiency (EE%) = (actual content measured / theoretical antibacterial agent content) × 100%; the results are shown in Table 1.

[0077] Experimental Example 3

[0078] The amount of antibacterial agent released from the sustained-release capsules of Examples 1-3 and Comparative Examples 1-2 was tested.

[0079] The release behavior of sustained-release capsules in a simulated food environment was studied using the dialysis bag method. 1g of sustained-release capsules were placed in a dialysis bag and immersed in phosphate buffer solution at pH 6.8 and shaken at 37℃. Samples were taken at regular intervals (at 4h and 72h) and the content of antimicrobial agent in the release medium was determined by HPLC.

[0080] Table 1

[0081]

[0082] As shown in Table 1, as in Example 1, when the mass concentration of glucomannan is 2.5% and the mass concentration of cellulose is 1.5%, the encapsulation rate of the antibacterial agent is high, the particle size is relatively uniform, and the release of the antibacterial agent is stable.

[0083] Comparing Examples 1 and 2, it can be seen that when the mass concentrations of glucomannan and cellulose decrease, the encapsulation efficiency of the antibacterial agent decreases, and the release rate of the antibacterial agent is relatively faster.

[0084] Comparing Examples 1 and 3, it can be seen that when the mass concentrations of glucomannan and cellulose increase, although the encapsulation efficiency of the antibacterial agent increases, the release rate of the antibacterial agent is too slow.

[0085] Comparing Examples 1 and 2 with Comparative Example 1, it can be seen that when the mass concentrations of glucomannan and cellulose are too low and the crosslinking temperature is too high, although the prepared sustained-release capsules exhibit a relatively stable sustained-release effect, it is difficult to achieve effective encapsulation of antibacterial agents, the total amount of antibacterial agents in the sustained-release capsules is low, and the antibacterial effect is poor.

[0086] Comparing Examples 1 and 3 with Comparative Example 2, it can be seen that even with increased mass concentrations of glucomannan and cellulose, cross-linking at lower temperatures can easily lead to adhesion when forming microcapsules, resulting in uneven particle size of the sustained-release capsules and difficulty in improving the encapsulation rate of the antibacterial agent. Consequently, it is difficult to achieve a good and long-lasting antibacterial effect in the prepared sustained-release capsules.

[0087] Example 4

[0088] PE and the glucomannan-water-soluble cellulose antibacterial material (sustained-release capsule) of Example 1 were mixed, and the mixture was then extruded using a twin-screw extruder to make a plastic wrap; wherein, the mass percentage of the sustained-release capsule was 5%.

[0089] Example 5

[0090] PE and the glucomannan-water-soluble cellulose antibacterial material (sustaining-release capsule) of Example 1 were mixed, and the mixture was then extruded using a twin-screw extruder to make a plastic wrap; wherein, the mass percentage of the sustained-release capsule was 1%.

[0091] Example 6

[0092] PE and the glucomannan-water-soluble cellulose antibacterial material (sustaining-release capsule) of Example 1 were mixed, and the mixture was extruded using a twin-screw extruder to make a plastic wrap; wherein, the mass percentage of the sustained-release capsule was 3%.

[0093] Example 7

[0094] PE and the glucomannan-water-soluble cellulose antibacterial material (sustaining-release capsule) of Example 1 were mixed, and the mixture was then extruded using a twin-screw extruder to make a plastic wrap; wherein, the mass percentage of the sustained-release capsule was 7%.

[0095] Experiment Example 4

[0096] The antibacterial activity of the plastic wraps used in Examples 4-7 was tested; a mixture of Escherichia coli and Staphylococcus aureus was used as an indicator strain, inoculated onto agar medium, and the antibacterial activity of each plastic wrap was tested using the inhibition zone method. The results are shown in Table 2.

[0097] Table 2

[0098]

[0099] As shown in Table 2, the plastic wrap exhibits the best antibacterial properties when the mass percentage of the sustained-release capsules is 5%; the antibacterial effect decreases when the mass percentage of the sustained-release capsules is below or above 5%.

[0100] Experimental Example 5

[0101] Preservation tests were conducted using the plastic wrap from Example 4 and commercially available ordinary PE plastic wrap. The test subjects were strawberries and chicken breast. The test method was to wrap strawberries and chicken breast with the plastic wrap from Example 4 and ordinary PE plastic wrap, respectively. Strawberries wrapped with the plastic wrap from Example 4 were test group 1, chicken breast wrapped with the plastic wrap from Example 4 were test group 2, strawberries wrapped with ordinary PE plastic wrap were control group 1, and chicken breast wrapped with ordinary PE plastic wrap were control group 2. Then, test groups 1 and 2 and control groups 1 and 2 were placed at the same room temperature and stored for 72 hours.

[0102] Microbiological testing, sensory evaluation, and physicochemical index testing were performed on experimental groups 1 and 2 and control groups 1 and 2. The results are shown in Table 3.

[0103] Table 3

[0104]

[0105]

[0106] Note: ND means Not Detected.

[0107] As shown in Table 3, the slow-release capsules added to the plastic wrap in Example 4 can effectively inhibit bacteria, thereby improving the preservation effect of food, slowing down the rate of food spoilage, slowing down the rate of decline in the sensory quality of food, delaying the process of food rancidity, and maintaining the nutritional components of food.

[0108] In summary, the preparation method of the glucomannan-water-soluble cellulose antibacterial material of the present invention optimizes the ratio of glucomannan and water-soluble cellulose, effectively encapsulating the antibacterial agent and ensuring its stable release, thereby improving and prolonging the antibacterial effect of the glucomannan-water-soluble cellulose antibacterial material. Furthermore, both glucomannan and water-soluble cellulose are biocompatible materials, ensuring the safety of the glucomannan-water-soluble cellulose antibacterial material.

[0109] The preparation method of the present invention yields a glucomannan-water-soluble cellulose antibacterial material for use in the preparation of food preservation films, which can give the food preservation films a long-lasting antibacterial and preservation effect.

[0110] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for preparing a glucomannan-water-soluble cellulose antibacterial material, characterized in that, The application relates to a preparation method of a glucosan-water-soluble cellulose antibacterial material. An aqueous phase solution is prepared by using glucosan and water-soluble cellulose, wherein the mass concentration of the glucosan is 1.5-3.5%, the mass concentration of the water-soluble cellulose is 1.0-2.5%, and the water-soluble cellulose comprises at least one of hydroxyethyl cellulose, hydroxypropyl cellulose, methyl cellulose, hydroxypropyl methyl cellulose, carboxymethyl cellulose, sodium carboxymethyl cellulose and polymeric quaternary ammonium salt-10; An oil phase solution is prepared by using an antibacterial agent and an emulsifier, wherein the antibacterial agent comprises at least one of eugenol, carvacrol, thymol, citral, cinnamaldehyde, vanillin, perillic aldehyde, citronellol, cumin essential oil and benzyl isothiocyanate; The oil phase solution is added dropwise into the aqueous phase solution, and high-speed shearing emulsification is carried out to form a nanoemulsion; The crosslinking agent is added dropwise into the nanoemulsion, and stirring and reaction are carried out at a temperature of 35-45 DEG C to form a crosslinked emulsion with a network structure; The crosslinked emulsion is prepared into a slow-release capsule by spray drying, wherein the inlet temperature of the spray drying is 170-190 DEG C, the outlet temperature is 80-90 DEG C, the atomization pressure is 0.15-0.25 MPa, and the feeding rate is 4-6 mL / min.

2. The method of producing a glucosan-water-soluble cellulose antibacterial material according to claim 1, characterized by, The mass concentration of the glucosan is 2.5%, and the mass concentration of the water-soluble cellulose is 1.5%.

3. The method of producing a glucosan-water-soluble cellulose antibacterial material according to claim 1, characterized by, The emulsifier comprises Tween 80, and the crosslinking agent comprises at least one of calcium chloride solution and glutaraldehyde.

4. The method of producing a glucosan-water-soluble cellulose antibacterial material according to claim 1, characterized by, The rotation speed of the high-speed shearing emulsification is 10,000-15,000 rpm.

5. A glucomannan-water-soluble cellulose antibacterial material, characterized by, The application further relates to a preservative film prepared by using the glucosan-water-soluble cellulose antibacterial material.

6. A preservative film characterized by, The preparation raw material of the preservative film comprises resin and the glucosan-water-soluble cellulose antibacterial material.

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