Preparation method of silk fibroin jelly and silk fibroin jelly

Abstract

The method comprises the following steps: preparing a silk fibroin aqueous solution based on natural silk fibroin with the serine content of 10%-12%, carrying out vacuum freezing treatment on the silk fibroin aqueous solution to obtain silk fibroin powder, dissolving the silk fibroin powder by using pure water, and carrying out vacuum freezing treatment on the silk fibroin aqueous solution to obtain the silk fibroin jelly. According to the preparation method, silk fibroin is taken as a raw material, a silk fibroin dissolving solution with the preset concentration of 1%-5% is formed, the silk fibroin dissolving solution is heated at the preset temperature of 60-90 DEG C so that the silk fibroin dissolving solution can be converted into gel, the silk fibroin jelly is obtained, the preparation process is simple, and the prepared jelly is prepared from natural silk fibroin and is rich in serine, so that the jelly is suitable for being used as a silk fibroin jelly. According to the present invention, the prepared jelly contains 22 amino acid proteins required by the human body, has the serine content of 10-12%, and does not contain other fat, sugar and the like, such that the nutritional value and the health-care value of the jelly are substantially improved so as to enhance the edible value of the jelly.

Description

Technical Field

[0001] The present application relates to the technical field of food processing, and in particular to a preparation method of silk fibroin jelly and silk fibroin jelly. Background Art

[0002] Jelly is a kind of snack food, which is semi-solid, crystal-clear, bright in color, and soft and smooth in taste, and is deeply loved by consumers. However, the nutritional value of jelly on the market is generally low, and thickeners and artificial synthetic substances such as sugar acid are used as the main raw materials, which reduces the edible value of jelly. Summary of the invention

[0003] In view of the above-mentioned problems in the prior art, the purpose of the present application is to provide a method for preparing silk fibroin jelly and silk fibroin jelly. The prepared jelly ingredients are derived from natural silk fibroin, which is rich in serine, a protein of 22 amino acids required by the human body. The serine content is as high as 10% to 12%, and it does not contain other fats, sugars, etc., which greatly improves the nutritional value and health value of the jelly, thereby enhancing the edible value of the jelly.

[0004] On the one hand, the present application provides a method for preparing silk fibroin jelly, the method comprising the following steps:

[0005] The method comprises the following steps:

[0006] S1: preparing a silk fibroin aqueous solution based on natural silk fibroin; the serine content in the natural silk fibroin is 10% to 12%;

[0007] S2: vacuum freezing the silk fibroin aqueous solution to obtain silk fibroin powder;

[0008] S3: dissolving the silk fibroin powder with pure water to form a silk fibroin solution with a preset concentration; the preset concentration is 1% to 5%;

[0009] S4: heating the silk fibroin solution at a preset temperature to transform the silk fibroin solution into a gel state to obtain silk fibroin jelly; the preset temperature range is 60 to 90°C.

[0010] In an exemplary embodiment, in step S4, the heating treatment is performed for 20 to 30 hours.

[0011] In an exemplary embodiment, in step S3, dissolving the silk fibroin powder with pure water to form a silk fibroin solution with a preset concentration includes:

[0012] According to the preset concentration, the silk fibroin powder is stirred and dissolved in pure water, and then allowed to stand for 1 to 5 hours to obtain the silk fibroin solution.

[0013] In an exemplary embodiment, the stirring and dissolving the silk fibroin powder in pure water includes: dissolving the silk fibroin powder and a preset flavoring agent in pure water.

[0014] In an exemplary embodiment, the preset flavoring agent includes any one or more combinations of citric acid, malic acid, lactic acid, phosphoric acid, and tartaric acid.

[0015] In an exemplary embodiment, in step S1, preparing a silk fibroin aqueous solution based on natural silk fibroin comprises:

[0016] Adding dry and clean silkworm cocoons into a degumming tank; the degumming tank is provided with a sodium carbonate solution feeding port, a temperature sensor, a steam inlet, and a compressed air inlet, wherein the sodium carbonate solution feeding port is connected to the sodium carbonate solution storage via a first pipeline, a flow meter is provided on the first pipeline, the steam inlet is connected to the steam source via a second pipeline, a first switch valve is provided on the second pipeline, the compressed air inlet is connected to the compressed air source via a third pipeline, a second switch valve is provided on the third pipeline, and the temperature sensor, the flow meter, the first switch valve, and the second switch valve are electrically connected to the degumming controller respectively;

[0017] The degumming controller is used to control the flow meter to open so that a preset volume of sodium carbonate solution flows into the degumming tank, wherein the ratio of the mass of the cocoons to the preset volume is (1:2) g / L;

[0018] The degumming controller is used to control the first switch valve to open, and the degumming tank is heated to a preset degumming temperature by steam, so that the cocoons in the degumming tank are heated and degummed in the sodium carbonate solution to form silk; the preset degumming temperature is 60-100° C.;

[0019] The silk is sequentially washed, dried, hydrolyzed and dialyzed by centrifugation to obtain the silk fibroin aqueous solution;

[0020] Among them, during the heating degumming process, the degumming controller obtains the temperature in the degumming tank detected by the temperature sensor, and when the temperature is higher than the preset degumming temperature, controls the closing of the first switch valve and the opening of the second switch valve, until the temperature returns to within the preset degumming temperature range, controls the opening of the first switch valve and the closing of the second switch valve.

[0021] In an exemplary embodiment, the step of sequentially washing, drying, hydrolyzing and dialyzing and centrifuging the silk to obtain the silk fibroin aqueous solution comprises:

[0022] When the heating degumming time in the degumming tank reaches a preset time, the heating degumming is stopped, and the degumming product in the degumming tank is input into a filtering device, and the degumming product is filtered by the filtering device to obtain the silk;

[0023] Washing the silk multiple times by using a washing and drying device, and drying the silk after the multiple washings to obtain dried silk;

[0024] The dried silk is placed in a silk dissolving and hydrolyzing tank in a heat-insulating space, and a lithium salt solution is added to the silk dissolving and hydrolyzing tank for thorough mixing, and then the mixture is kept warm for a period of time to obtain a silk fibroin lithium salt aqueous solution;

[0025] The silk fibroin lithium salt aqueous solution is dialyzed using a dialysis centrifugal device, and the remaining solution after the dialysis is centrifuged to collect the upper clear liquid to obtain the silk fibroin aqueous solution.

[0026] In an exemplary embodiment, the dialysis centrifuge device comprises a hollow fiber membrane, and the dialyzing the silk fibroin lithium salt aqueous solution comprises: dialyzing the silk fibroin lithium salt aqueous solution using the hollow fiber membrane.

[0027] In an exemplary embodiment, a purified compressed air agitator is provided in the soluble silk hydrolysis tank, and during the heat preservation process of the soluble silk hydrolysis tank, purified compressed air is introduced through the purified compressed air agitator for stirring.

[0028] On the other hand, the present application provides a silk fibroin jelly, which is prepared by any one of the above-mentioned methods for preparing silk fibroin jelly.

[0029] The present application prepares a silk fibroin aqueous solution based on natural silk fibroin with a serine content of 10% to 12%, and vacuum freezes the silk fibroin aqueous solution to obtain silk fibroin powder, and then uses pure water to dissolve the silk fibroin powder to form a silk fibroin solution with a preset concentration of 1% to 5%, and heats the silk fibroin solution at a preset temperature of 60 to 90°C to convert the silk fibroin solution into a gel to obtain silk fibroin jelly. The preparation process is simple, and the prepared jelly ingredients are derived from natural silk fibroin, which is rich in serine, a protein of 22 amino acids required by the human body, has a serine content of up to 10% to 12%, and does not contain other fats, sugars, etc., which greatly improves the nutritional value and health value of the jelly, thereby enhancing the edible value of the jelly. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments or prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a schematic diagram of a process for preparing a silk fibroin jelly provided in an embodiment of the present application;

[0032] Figure 2 is a schematic diagram of a process system for preparing a silk fibroin aqueous solution provided in an embodiment of the present application;

[0033] Figure 3 This is a schematic diagram of a finished product of silk fibroin jelly prepared by the method of the embodiment of the present application;

[0034] Figure 4 It is a schematic diagram of the test results of histological testing provided in the examples of the present application. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0036] Example 1

[0037] See also Figure 1 , which is a schematic diagram of a process for preparing a silk fibroin jelly provided in an embodiment of the present application, such as Figure 1 As shown, the method comprises the following steps:

[0038] S1: preparing a silk fibroin aqueous solution based on natural silk fibroin, wherein the serine content in the natural silk fibroin is 10% to 12%;

[0039] S2: vacuum freezing the silk fibroin aqueous solution to obtain silk fibroin powder;

[0040] S3: dissolving the silk fibroin powder with pure water to form a silk fibroin solution with a preset concentration; the preset concentration is 1% to 5%;

[0041] S4: heating the silk fibroin solution at a preset temperature to transform the silk fibroin solution into a gel state to obtain silk fibroin jelly; the preset temperature range is 60 to 90°C.

[0042] For example, the source of natural silk fibroin in the embodiments of the present application can be silk, wherein silk is mainly composed of fibroin and sericin, and fibroin as the core structural protein occupies 70% to 80% of the silk content.

[0043] For example, the vacuum freezing time of the silk fibroin aqueous solution in step S2 is 5 to 8 hours, the vacuum freezing temperature is -20 to -5°C, and the vacuum freezing pressure is 0.005 mBar to 0.8 mBar. The freeze-dried powder obtained by the vacuum freezing treatment is the silk fibroin powder.

[0044] In an exemplary embodiment, in the above step S4, the heating treatment is performed for 20 to 30 hours.

[0045] In an exemplary embodiment, in step S3, the silk fibroin powder is dissolved in pure water to form a silk fibroin solution of a preset concentration, including: stirring and dissolving the silk fibroin powder in pure water at a preset concentration of 1% to 5%, and then standing for 1 to 5 hours to obtain the silk fibroin solution.

[0046] In an exemplary embodiment, the stirring and dissolving the silk fibroin powder in pure water includes: dissolving the silk fibroin powder and a preset flavoring agent in pure water.

[0047] Exemplarily, the preset flavoring agent includes any one or more combinations of citric acid, malic acid, lactic acid, phosphoric acid, and tartaric acid.

[0048] In an exemplary embodiment, when preparing the silk fibroin aqueous solution, Figure 2 The degumming tank 210 in the process system shown is implemented as follows: Figure 2 As shown, the degumming tank 210 is provided with a sodium carbonate solution feeding port 211 , a temperature sensor 212 , a steam inlet 213 , and a compressed air inlet 214 .

[0049] The sodium carbonate solution feeding port 211 is connected to the sodium carbonate solution storage 220 through a first pipe 221, and the sodium carbonate solution storage 220 stores a sodium carbonate solution with a concentration of 20 g / L to 80 g / L. A flow meter 222 is provided on the first pipe 221. The steam inlet 213 is connected to the steam source through a second pipe 223, and a first switch valve 224 is provided on the second pipe 223. The compressed air inlet 214 is connected to the compressed air source through a third pipe 225, and a second switch valve 226 is provided on the third pipe 225. The temperature sensor 212, the flow meter 222, the first switch valve 224 and the second switch valve 226 are electrically connected to the degumming controller 230 respectively, and the degumming controller 230 can provide a human-computer interaction interface to control the degumming process.

[0050] Based on this, in the above step S1, preparing a silk fibroin aqueous solution based on natural silk fibroin includes:

[0051] Adding the dry and clean silkworm cocoons into the degumming tank 210;

[0052] The degumming controller 230 is used to control the flow meter 222 to open, so that the sodium carbonate solution of a preset volume stored in the sodium carbonate solution storage 220 flows into the degumming tank 210, wherein the ratio of the mass of the cocoons to the preset volume is (1:2) g / L;

[0053] The degumming controller 230 is used to control the first switch valve 224 to open, and the degumming tank 210 is heated to a preset degumming temperature by steam, so that the cocoons in the degumming tank 210 are heated and degummed in the sodium carbonate solution to form silk; the preset degumming temperature is 60-100° C.;

[0054] The silk is sequentially washed, dried, hydrolyzed and dialyzed by centrifugation to obtain the silk fibroin aqueous solution;

[0055] Among them, during the heating degumming process, the degumming controller 230 obtains the temperature in the degumming tank 210 detected by the temperature sensor 212, and when the temperature is higher than the preset degumming temperature, controls the closing of the first switch valve 224 and the opening of the second switch valve 226, until the temperature returns to within the preset degumming temperature range, controls the opening of the first switch valve 224 and the closing of the second switch valve 226.

[0056] The above implementation achieves automated control of the degumming process, making the degumming process more stable, improving the quality of the obtained silk, and further facilitating the improvement of the quality of the silk fibroin jelly finally obtained.

[0057] In an exemplary embodiment, Figure 2As shown, the process system may further include a filtering device 240, a washing and drying device 250, a silk dissolving and hydrolyzing tank 260 and a dialysis centrifugal device 270. Based on this, the above-mentioned sequentially washing, drying, hydrolyzing and dialysis centrifugal treatment of the silk to obtain the silk fibroin aqueous solution may include:

[0058] When the heating degumming time in the degumming tank 210 reaches a preset time, the heating degumming is stopped, and the degumming product in the degumming tank 210 is transported to the filtering device 240, and the degumming product is filtered by the filtering device 240 to obtain the silk;

[0059] The silk is washed multiple times by a washing and drying device 250, and dried after the multiple washings to obtain dried silk;

[0060] The dried silk is fed into a silk dissolving and hydrolyzing tank 260 in a heat-insulating space, and a lithium salt solution is added to the silk dissolving and hydrolyzing tank 260 for thorough mixing, and then kept warm for a period of time to obtain a silk fibroin lithium salt aqueous solution;

[0061] The silk fibroin lithium salt aqueous solution is dialyzed using a dialysis centrifugal device 240, and the remaining solution after dialysis is centrifuged to collect the supernatant to obtain the silk fibroin aqueous solution.

[0062] Specifically, the preset duration can be set based on actual needs, and different preset durations can correspond to silk fibroin with different average molecular weights, that is, the average molecular weight of silk fibroin can be adjusted by adjusting the heating degumming duration in the degumming tank 210. In the embodiment of the present application, the average molecular weight of silk fibroin ranges from 10KDa to 300KDa, and the preset duration can be set to 1s to 1000h. In a specific implementation, the heating degumming can be stopped by closing the first switch valve 224 to stop steam heating through the degumming controller 230, and opening the second switch valve 226 to allow compressed air to be introduced for cooling.

[0063] The washing and drying device 250 can use ultrapure water to wash the silk for multiple times, and after the multiple washings, perform a drying process at a drying temperature of 5 to 100° C. for a drying time of 1 to 100 hours.

[0064] Among them, the lithium salt solution added to the silk dissolving and hydrolyzing tank 260 is a lithium bromide solution or a lithium thiocyanate solution, and the volume ratio of the mass of the silk after drying to the lithium salt aqueous solution is (1-100): 100g / ml; the insulation temperature in the silk dissolving and hydrolyzing tank 260 is 30℃-50℃, and the insulation time is 0.5h-5h.

[0065] In an exemplary embodiment, a purified compressed air agitator is provided in the silk dissolving hydrolysis tank. During the heat preservation process, purified compressed air is introduced into the silk dissolving hydrolysis tank through the purified compressed air agitator for stirring, thereby accelerating the dissolution rate of silk in the lithium salt solution without damaging the silk, thereby improving the preparation efficiency and quality of silk fibroin jelly.

[0066] In an exemplary embodiment, the dialysis centrifugal device 240 includes a hollow fiber membrane, and the dialysis of the silk fibroin lithium salt aqueous solution includes: using the hollow fiber membrane to dialyze the silk fibroin lithium salt aqueous solution. In a specific implementation, the silk fibroin lithium salt aqueous solution can be placed in a dialysis container formed by a hollow fiber membrane and placed in ultrapure water for dialysis, and the ultrapure water should be continuously changed to speed up the dialysis speed. After the dialysis is completed, the dialysis container is taken out, the solution in the above dialysis container is centrifuged, and the supernatant is collected to obtain the silk fibroin aqueous solution.

[0067] Exemplarily, the hollow fiber membrane can be a stacked multi-layer hollow fiber membrane, so as to achieve better dialysis of the silk fibroin lithium salt aqueous solution, which is beneficial to further reduce impurities in the silk fibroin jelly, thereby improving the quality of the jelly.

[0068] Example 2

[0069] This embodiment provides a method for preparing silk fibroin jelly, comprising the following steps:

[0070] 1) Weigh a certain amount of dry and clean silk cocoons with a balance and put the weighed clean silk cocoons into Figure 2 In the degumming tank 210 of the process system shown, the flow meter 222 is controlled by the degumming controller 230 to add the sodium carbonate solution in the sodium carbonate solution storage 220 into the degumming tank 210, the concentration of the sodium carbonate solution is 20g / L, and the ratio of the mass of the cocoon to the preset volume is (1:2)g / L; the first switch valve 224 is controlled by the degumming controller 230 to open and use steam for heating, the preset degumming temperature is set to 80°C, the heating degumming time is set to 1h, and the average molecular weight of the silk fibroin is 100KDa.

[0071] 2) When the heating degumming time in the degumming tank 210 reaches 1 hour, the heating degumming is stopped, and the degumming product in the degumming tank 210 is transported to the filtering device 240, and the degumming product is filtered by the filtering device 240 to obtain silk. The obtained silk is washed multiple times by the washing and drying device 250, and after the multiple washings, it is dried at 60° C. for 2 hours to obtain dried silk.

[0072] 3) The dried silk is input into a silk dissolving and hydrolyzing tank 260 in a heat-insulating space, and lithium bromide solution is added into the silk dissolving and hydrolyzing tank 260 for thorough mixing. Purified compressed air is then introduced through a purified compressed air agitator for stirring, and the mixture is kept warm at 40°C for 2 hours to obtain a silk fibroin lithium salt aqueous solution.

[0073] 4) The silk fibroin lithium salt aqueous solution is placed in a dialysis container formed by a hollow fiber membrane, and dialyzed in ultrapure water. After the dialysis is completed, the dialysis container is taken out, and the solution in the dialysis container is transferred to a centrifuge for centrifugal separation, and the supernatant is collected to obtain the silk fibroin aqueous solution.

[0074] 5) Freezing the silk fibroin aqueous solution at -8°C; placing the frozen silk fibroin aqueous solution in a freeze dryer for vacuum freezing to obtain silk fibroin powder; wherein the vacuum freezing time is 6 hours, the vacuum freezing temperature is -8°C, and the vacuum freezing pressure is 0.2 mBar.

[0075] 6) The silk fibroin powder was stirred and dissolved in pure water at a concentration of 2%, and then allowed to stand for 4 hours to obtain a 2% silk fibroin solution.

[0076] 7) The silk fibroin solution was heated at 60° C. for 24 hours to transform the silk fibroin solution into a gel state, thereby obtaining a silk fibroin jelly.

[0077] Example 3

[0078] The difference between this embodiment and the above-mentioned embodiment 2 is that: the silk fibroin powder is stirred and dissolved in pure water at a concentration of 1%, and then allowed to stand for 1 hour to obtain a silk fibroin solution with a concentration of 1%; and the above-mentioned silk fibroin solution is heated at 90°C for 20 hours to convert the silk fibroin solution into a gel to obtain silk fibroin jelly.

[0079] Example 4

[0080] The difference between this embodiment and the above-mentioned embodiment 2 lies in that: the silk fibroin powder is stirred and dissolved in pure water at a concentration of 5%, and then allowed to stand for 5 hours to obtain a silk fibroin solution with a concentration of 5%; and the above-mentioned silk fibroin solution is heated at 80°C for 30 hours to convert the silk fibroin solution into a gel to obtain silk fibroin jelly.

[0081] Figure 3 The figure shows the schematic diagram of the silk fibroin jelly prepared by the method for preparing the silk fibroin jelly according to the above-mentioned embodiment 2. Figure 3 It can be seen that the silk fibroin jelly of the embodiment of the present application has high transparency and bright color.

[0082] Example 5

[0083] Mice were fed with normal water and 2% silk fibroin solution (hereinafter referred to as 2% silk fibroin) for 3 months, and then the mice were subjected to histological examination. The test results are shown in Figure 4 .Depend on Figure 4 It can be seen that no obvious abnormalities were found in the HE staining comparison of the heart, liver, spleen, lung, kidney, large intestine, small intestine and stomach of mice in different treatment groups. After feeding with 2% silk fibroin for 3 months, the sections of various organs of the mice were normal, indicating that silk fibroin can be used as a safe and healthy food additive in the field of food additives.

[0084] The embodiment of the present application also provides a silk fibroin jelly, which is prepared by using any one of the above-mentioned preparation methods of the silk fibroin jelly of the embodiment of the present application.

[0085] The embodiment of the present application is based on the natural silk fibroin with a serine content of 10% to 12% to prepare a silk fibroin aqueous solution, and the silk fibroin aqueous solution is subjected to vacuum freezing treatment to obtain a silk fibroin powder, and then the silk fibroin powder is dissolved in pure water to form a silk fibroin solution with a preset concentration of 1% to 5%, and the silk fibroin solution is heated at a preset temperature of 60 to 90°C to convert the silk fibroin solution into a gel to obtain a silk fibroin jelly, the preparation process is simple, the prepared jelly ingredients are derived from natural silk fibroin, rich in serine, which is a protein of 22 amino acids required by the human body, and the serine content is as high as 10% to 12%, and does not contain other fats, sugars, etc., which greatly improves the nutritional value and health value of the jelly, and thus enhances the edible value of the jelly. In addition, a large number of studies have confirmed that serine has significant effects on anti-aging, anti-diabetes, etc., thus further highlighting the edible value of the silk fibroin jelly of the embodiment of the present application.

[0086] The above description has fully disclosed the specific embodiments of the present invention. It should be pointed out that any changes made by those skilled in the art to the specific embodiments of the present invention do not deviate from the scope of the claims of the present invention. Accordingly, the scope of the claims of the present invention is not limited to the above specific embodiments.

Claims

1. A method for preparing silk fibroin jelly, characterized in that: The method comprises the following steps: S1: preparing a silk fibroin aqueous solution based on natural silk fibroin; the serine content in the natural silk fibroin is 10% to 12%; S2: vacuum freezing the silk fibroin aqueous solution to obtain silk fibroin powder; S3: dissolving the silk fibroin powder with pure water to form a silk fibroin solution with a preset concentration; the preset concentration is 1% to 5%; S4: heating the silk fibroin solution at a preset temperature to transform the silk fibroin solution into a gel state to obtain silk fibroin jelly; the preset temperature range is 60 to 90°C.

2. The method for preparing silk fibroin jelly according to claim 1, characterized in that: In the step S4, the heating treatment is performed for 20 to 30 hours.

3. The method for preparing silk fibroin jelly according to claim 1, characterized in that: In the step S3, dissolving the silk fibroin powder with pure water to form a silk fibroin solution with a preset concentration comprises: According to the preset concentration, the silk fibroin powder is stirred and dissolved in pure water, and then allowed to stand for 1 to 5 hours to obtain the silk fibroin solution.

4. The method for preparing silk fibroin jelly according to claim 3, characterized in that: The stirring and dissolving the silk fibroin powder in pure water comprises: dissolving the silk fibroin powder and a preset flavoring agent in pure water.

5. The method for preparing silk fibroin jelly according to claim 4, characterized in that: The preset flavoring agent includes any one or more combinations of citric acid, malic acid, lactic acid, phosphoric acid, and tartaric acid.

6. The method for preparing silk fibroin jelly according to claim 1, characterized in that: In the step S1, preparing a silk fibroin aqueous solution based on natural silk fibroin comprises: Adding dry and clean silkworm cocoons into a degumming tank; the degumming tank is provided with a sodium carbonate solution feeding port, a temperature sensor, a steam inlet, and a compressed air inlet, wherein the sodium carbonate solution feeding port is connected to the sodium carbonate solution storage via a first pipeline, a flow meter is provided on the first pipeline, the steam inlet is connected to the steam source via a second pipeline, a first switch valve is provided on the second pipeline, the compressed air inlet is connected to the compressed air source via a third pipeline, a second switch valve is provided on the third pipeline, and the temperature sensor, the flow meter, the first switch valve, and the second switch valve are electrically connected to the degumming controller respectively; The degumming controller is used to control the flow meter to open so that a preset volume of sodium carbonate solution flows into the degumming tank, wherein the ratio of the mass of the cocoons to the preset volume is (1:2) g / L; The degumming controller is used to control the first switch valve to open, and the degumming tank is heated to a preset degumming temperature by steam, so that the cocoons in the degumming tank are heated and degummed in the sodium carbonate solution to form silk; the preset degumming temperature is 60-100° C.; The silk is sequentially washed, dried, hydrolyzed and dialyzed by centrifugation to obtain the silk fibroin aqueous solution; Among them, during the heating degumming process, the degumming controller obtains the temperature in the degumming tank detected by the temperature sensor, and when the temperature is higher than the preset degumming temperature, controls the closing of the first switch valve and the opening of the second switch valve, until the temperature returns to within the preset degumming temperature range, controls the opening of the first switch valve and the closing of the second switch valve.

7. The method for preparing silk fibroin jelly according to claim 6, characterized in that: The step of sequentially washing, drying, hydrolyzing and dialysis centrifuging the silk to obtain the silk fibroin aqueous solution comprises: When the heating degumming time in the degumming tank reaches a preset time, the heating degumming is stopped, and the degumming product in the degumming tank is input into a filtering device, and the degumming product is filtered by the filtering device to obtain the silk; Washing the silk multiple times by using a washing and drying device, and drying the silk after the multiple washings to obtain dried silk; The dried silk is placed in a silk dissolving and hydrolyzing tank in a heat-insulating space, and a lithium salt solution is added to the silk dissolving and hydrolyzing tank for thorough mixing, and then the mixture is kept warm for a period of time to obtain a silk fibroin lithium salt aqueous solution; The silk fibroin lithium salt aqueous solution is dialyzed using a dialysis centrifugal device, and the remaining solution after the dialysis is centrifuged to collect the upper clear liquid to obtain the silk fibroin aqueous solution.

8. The method for preparing silk fibroin jelly according to claim 7, characterized in that: The dialysis centrifugal device comprises a hollow fiber membrane, and the dialyzing the silk fibroin lithium salt aqueous solution comprises: dialyzing the silk fibroin lithium salt aqueous solution using the hollow fiber membrane.

9. The method for preparing silk fibroin jelly according to claim 7, characterized in that: A purified compressed air agitator is arranged in the soluble silk hydrolysis tank. During the heat preservation process of the soluble silk hydrolysis tank, purified compressed air is introduced through the purified compressed air agitator for stirring.

10. A silk fibroin jelly, characterized in that: The silk fibroin jelly is prepared by the preparation method of any one of claims 1 to 9.

Images