Preparation method of mildew-proof degradable soybean protein adhesive

Abstract

The invention relates to the technical field of soybean protein-based adhesives, in particular to a preparation method of a mildew-proof degradable soybean protein adhesive. The supporting frames are fixedly connected to the supporting bottom plate, and the two supporting frames are arranged in parallel; the connecting plate is fixedly connected to the supporting frame; the positioning ring is fixedly connected to the connecting plate; the shell is connected to the positioning ring; the stirring device is arranged on the shell and is used for uniformly stirring and mixing the materials put into the shell; the discharging device is arranged on the supporting bottom plate and used for transporting materials in the stirring device, meanwhile, in the rotating process of a rotating shaft, a limiting rod fixedly arranged on the peripheral face of the rotating shaft can drive a cylindrical cam to move, and in the moving process of the cylindrical cam, a first scraping plate is driven to move along a sliding groove in a shell; and the scraping treatment on the materials adhered to the inner wall of the shell is realized.

Description

Technical Field

[0001] The invention relates to the technical field of soybean protein-based adhesives, in particular to a method for preparing a mildew-proof and degradable soybean protein adhesive. Background Art

[0003] The adhesives used in traditional artificial boards are almost all "trialdehyde resins" represented by urea-formaldehyde resin, phenol-formaldehyde resin, and melamine-formaldehyde resin. The products prepared by existing methods, such as soybean glue, starch glue and other biomass adhesives, have problems such as high viscosity, short application period, poor water resistance and long hot pressing time. The soybean protein adhesive with high viscosity will adhere to the inner wall of the device, thereby affecting the working efficiency of the device.

[0004] Therefore, it is necessary to provide a method for preparing a mildew-proof and degradable soybean protein adhesive to solve the above problems.

[0005] It should be noted that the above information disclosed in this background technology section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute the prior art. Summary of the invention

[0006] Based on the above-mentioned problems existing in the prior art, the problem to be solved by this application is that the adhesives used in traditional artificial boards are almost all "trialdehyde resins" represented by urea-formaldehyde resin, phenol-formaldehyde resin, and melamine-formaldehyde resin. The products of biomass adhesives such as soybean glue and starch glue prepared by existing methods have problems such as high viscosity, short application period, poor water resistance and long hot pressing time. The soybean protein adhesive with high viscosity will adhere to the inner wall of the device, thereby affecting the working efficiency of the device.

[0007] The technical solution adopted by the present application to solve the technical problem is: a method for preparing a mildew-proof and degradable soybean protein adhesive, comprising:

[0008] Step 1: Soy protein pretreatment

[0009] First, the soy protein powder is mixed with an appropriate amount of water and stirred to make it uniform. Then, it is heated to a certain temperature to denature the protein.

[0010] Step 2: Adding modifier

[0011] The pretreated soy protein solution is mixed with the modifier, the pH value is adjusted, and the mixture is stirred evenly to ensure that the modifier and the protein react fully, and the mixture is prepared from the following raw materials: 68 parts of softened water, 12 parts of defatted soy protein powder, 1.5 parts of sodium carbonate, 1.8 parts of peach gum, 1.5 parts of complexing agent, 1.5 parts of urea, and 7 parts of sapodilla residue powder;

[0012] Step 3: Mixing and homogenization

[0013] The mixed solution is placed in a stirring device for high-speed stirring or homogenization to improve the fluidity and uniformity of the adhesive;

[0014] S1, after melting peach gum, add it into softened water and heat it to 100-110° C. and keep it for 0.5-1 hour, and keep stirring during the heating process to obtain peach gum aqueous solution;

[0015] S2, adding saponin powder and urea to the peach gum aqueous solution, and maintaining the temperature at 70-0°C and stirring for 0.5-1 hour to obtain a mixed solution;

[0016] S3, adding sodium carbonate and defatted soy protein powder to the mixed solution cooled to 50-70° C., heating and maintaining the temperature at 50-0° C. and stirring for 0.4-0.8 hours to obtain a mixture;

[0017] S4, adding a complexing agent to the mixture after the mixture is cooled to 30-40° C. and stirring evenly to obtain a soybean protein adhesive;

[0018] Step 4: Filtration and defoaming

[0019] Filter the homogenized solution to remove impurities and bubbles;

[0020] Step 5: Drying and molding

[0021] After the above steps, the adhesive is dried and formed, and purified soybean protein is obtained through desalting, acidification and other treatments, and then heated, cooled and other treatments to make it gel to form an adhesive;

[0022] The stirring device in step 3 comprises:

[0023] Support base plate;

[0024] A support frame, fixedly connected to the support base plate, and two of the support frames are arranged parallel to each other;

[0025] A connecting plate, fixedly connected to the supporting frame;

[0026] A positioning ring, fixedly connected to the connecting plate;

[0027] A housing connected to the positioning ring;

[0028] A stirring device, disposed on the shell, for stirring and mixing the material placed in the shell;

[0029] A material discharge device is arranged on the supporting bottom plate and is used for transporting the material in the stirring device.

[0030] Preferably, four mutually parallel support columns are fixedly connected to the support base plate, and the four support columns are distributed at the corners of the support base plate.

[0031] Preferably, the stirring device includes a positioning plate fixedly connected to the outer shell, a driving motor is fixedly connected to the positioning plate, a rotating shaft is rotatably connected inside the outer shell, the output end of the driving motor is fixedly connected between the rotating shafts, two stirring shafts parallel to each other are rotatably connected to the outer shell, and a plurality of staggered stirring rods are fixedly connected to the outer circumferences of the two stirring shafts, and a transmission unit for controlling the rotation of the stirring shafts is provided on the driving motor.

[0032] Preferably, the transmission unit comprises pulleys fixedly connected to the outer circumferences of the rotating shaft and the stirring shaft, and a belt is transmission-connected between the two pulleys.

[0033] Preferably, a slide groove is provided on the inner wall of the shell, a scraper 1 is slidably provided on the slide groove, and a control unit for controlling the movement of the scraper 1 is provided on the rotating shaft.

[0034] Preferably, the control unit includes a cylindrical cam slidably connected to the outer circumferential surface of the rotating shaft, a limiting rod matching the cylindrical cam is fixedly arranged on the outer circumferential surface of the rotating shaft, and the cylindrical cam is fixedly connected to the scraper.

[0035] Preferably, the bottom end of the shell is funnel-shaped, and a second scraper is rotatably connected to the bottom end inside the shell, and the second scraper is fixedly connected to the rotating shaft.

[0036] Preferably, a discharge pipe is fixedly connected to the bottom end of the shell, a plurality of discharge slots are provided on the discharge pipe, and a barrier tube is slidably arranged inside the discharge pipe.

[0037] Preferably, the material discharge device comprises a bracket fixedly connected to the supporting base plate, an axle is rotatably arranged between the two brackets, and a material discharge hopper is rotatably connected to the axle.

[0038] Preferably, a rolling shaft is rotatably arranged between another group of the brackets, a servo motor is fixedly arranged on one of the brackets, an output end of the servo motor is fixedly connected to the rolling shaft, and the cross section of the rolling shaft is elliptical.

[0039] The beneficial effect of the present application is as follows: the present application provides a method for preparing a mildew-proof and degradable soy protein adhesive, which is realized by a shell arranged on a supporting bottom plate and a stirring device arranged in the shell, when a staff member puts the material to be processed into the shell, the driving motor is started to rotate the rotating shaft fixedly arranged on the output end of the driving motor, and the rotating shaft drives the stirring shaft to rotate through a pulley and a belt, so that the stirring rod fixedly connected to the stirring shaft rotates to stir the material in the shell, and at the same time, during the rotation of the rotating shaft, the limiting rod fixedly arranged on the outer circumference of the rotating shaft can drive the cylindrical cam to move, and the cylindrical cam drives the scraper to move along the slide groove on the shell during the movement, so as to scrape off the material adhering to the inner wall of the shell.

[0040] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the preparation process of the present invention;

[0042] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0043] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0044] Figure 4 It is a schematic diagram of the overall inner wall structure of the present invention;

[0045] Figure 5 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0046] Figure 6 It is a schematic diagram of the structure of the discharge pipe of the present invention;

[0047] Figure 7 It is a schematic diagram of the local structure of the present invention;

[0048] Figure 8 For the present invention Figure 7 Enlarged structural diagram at point C in the middle.

[0049] In the figure: 1. supporting base plate; 11. supporting column; 2. supporting frame; 3. connecting plate; 4. positioning ring; 5. outer shell; 6. stirring device; 61. positioning plate; 62. driving motor; 63. rotating shaft; 64. stirring shaft; 65. stirring rod; 66. transmission unit; 661. pulley; 662. belt; 7. unloading device; 71. bracket; 72. shaft body; 73. unloading hopper; 74. rolling shaft; 75. servo motor; 8. chute; 81. scraper 1; 82. control unit; 821. cylindrical cam; 83. scraper 2; 9. discharge pipe; 91. discharge trough; 92. barrier pipe. DETAILED DESCRIPTION

[0050] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0051] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings 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 creative work should fall within the scope of protection of the present application.

[0052] Reference Figure 1-3 , a method for preparing a mildew-proof and degradable soybean protein adhesive, comprising:

[0053] Step 1: Soy protein pretreatment

[0054] First, the soy protein powder is mixed with an appropriate amount of water and stirred to make it uniform. Then, it is heated to a certain temperature to denature the protein.

[0055] Step 2: Adding modifier

[0056] The pretreated soy protein solution is mixed with the modifier, the pH value is adjusted, and the mixture is stirred evenly to ensure that the modifier and the protein react fully, and the mixture is prepared from the following raw materials: 68 parts of softened water, 12 parts of defatted soy protein powder, 1.5 parts of sodium carbonate, 1.8 parts of peach gum, 1.5 parts of complexing agent, 1.5 parts of urea, and 7 parts of sapodilla residue powder;

[0057] Step 3: Mixing and homogenization

[0058] The mixed solution is placed in a stirring device for high-speed stirring or homogenization to improve the fluidity and uniformity of the adhesive;

[0059] S1, after melting peach gum, add it into softened water and heat it to 100-110° C. and keep it for 0.5-1 hour, and keep stirring during the heating process to obtain peach gum aqueous solution;

[0060] S2, adding saponin powder and urea to the peach gum aqueous solution, and maintaining the temperature at 70-0°C and stirring for 0.5-1 hour to obtain a mixed solution;

[0061] S3, adding sodium carbonate and defatted soy protein powder to the mixed solution cooled to 50-70° C., heating and maintaining the temperature at 50-0° C. and stirring for 0.4-0.8 hours to obtain a mixture;

[0062] S4, adding a complexing agent to the mixture after the mixture is cooled to 30-40° C. and stirring evenly to obtain a soybean protein adhesive;

[0063] Step 4: Filtration and defoaming

[0064] Filter the homogenized solution to remove impurities and bubbles;

[0065] Step 5: Drying and molding

[0066] After the above steps, the adhesive is dried and formed, and purified soybean protein is obtained through desalting, acidification and other treatments, and then heated, cooled and other treatments to make it gel to form an adhesive;

[0067] The stirring device in step 3 includes:

[0068] A supporting base plate 1; a supporting frame 2, fixedly connected to the supporting base plate 1, and the two supporting frames 2 are arranged parallel to each other; a connecting plate 3, fixedly connected to the supporting frame 2; a positioning ring 4, fixedly connected to the connecting plate 3; a shell 5, connected to the positioning ring 4; a stirring device 6, arranged on the shell 5, for stirring and mixing the material placed in the shell 5; a feeding device 7, arranged on the supporting base plate 1, for transporting the material in the stirring device 6.

[0069] Reference Figure 1-3 Four mutually parallel support columns 11 are fixedly connected to the support base plate 1, and the four support columns 11 are distributed at the corners of the support base plate 1. By setting the support columns 11 on the support base plate 1, the function of supporting the device body is realized, and the stability of the device during use is maintained.

[0070] shell Figure 2 , 45, the stirring device 6 includes a positioning plate 61 fixedly connected to the outer shell 5, a driving motor 62 fixedly connected to the positioning plate 61, a rotating shaft 63 rotatably connected to the outer shell 5, an output end of the driving motor 62 is fixedly connected to the rotating shaft 63, two stirring shafts 64 parallel to each other are rotatably connected to the outer shell 5, and a plurality of staggered stirring rods 65 are fixedly connected to the outer circumferences of the two stirring shafts 64, a transmission unit 66 for controlling the rotation of the stirring shafts 64 is provided on the driving motor 62, and when the driving motor 62 is started by the driving motor 62 arranged on the positioning plate 61, the rotating shaft 63 fixedly arranged on the output end of the driving motor 62 rotates, and the rotating rotating shaft 63 drives the stirring shaft 64 to rotate through the transmission unit 66, and the stirring rod 65 fixedly arranged on the stirring shaft 64 can stir and mix the materials in the device shell 5, thereby improving the efficiency of material forming.

[0071] Reference Figure 2 , 4 and 5. The transmission unit 66 includes a pulley 661 fixedly connected to the outer circumference of the rotating shaft 63 and the stirring shaft 64, and a belt 662 is transmission-connected between the two pulleys 661. By means of the pulley 661 arranged on the outer circumference of the rotating shaft 63 and the stirring shaft 64, when the rotating shaft 63 rotates, the pulley 661 fixedly arranged on the rotating shaft 63 rotates, and the stirring shaft 64 is driven to rotate by the pulley 661, which is simple and convenient.

[0072] Reference Figure 4-6 A slide groove 8 is provided on the inner wall of the shell 5, a scraper 81 is slidably provided on the slide groove 8, and a control unit 82 for controlling the movement of the scraper 81 is provided on the rotating shaft 63. The slide groove 8 provided on the shell 5 ensures that the scraper 81 can move along the slide groove 8 during the movement process, avoiding the occurrence of position deviation and ensuring the stability of the device during operation.

[0073] Reference Figure 2-4 The control unit 82 includes a cylindrical cam 821 slidably connected to the outer circumference of the rotating shaft 63. A limit rod matching the cylindrical cam 821 is fixedly arranged on the outer circumference of the rotating shaft 63. The cylindrical cam 821 is fixedly connected to the scraper 81. By setting the cylindrical cam 821 on the outer circumference of the rotating shaft 63, the cylindrical cam 821 can reciprocate up and down along the rotating shaft 63 when the rotating shaft 63 rotates.

[0074] Reference Figure 4-6 The bottom end of the shell 5 is funnel-shaped, and a scraper 2 83 is rotatably connected to the bottom end of the shell 5. The scraper 2 83 is fixedly connected to the rotating shaft 63. By setting the bottom end of the shell 5 to be funnel-shaped, the material concentrated on the bottom of the shell 5 can slide down along the bottom end of the shell 5.

[0075] Reference Figure 6-8A discharge pipe 9 is fixedly connected to the bottom end of the shell 5, and a plurality of discharge slots 91 are provided on the discharge pipe 9. A barrier pipe 92 is slidably provided in the discharge pipe 9. The discharge pipe 9 provided on the shell 5 ensures that the device can operate stably.

[0076] Reference Figure 6-8 The unloading device 7 includes a bracket 71 fixedly connected to the supporting base plate 1, a shaft 72 is rotatably arranged between the two brackets 71, and a unloading hopper 73 is rotatably connected to the shaft 72. The unloading hopper 73 arranged on the shaft 72 ensures that the material flowing out of the shell 5 can be discharged stably.

[0077] Reference Figure 7-8 A rolling shaft 74 is rotatably arranged between another group of brackets 71, a servo motor 75 is fixedly arranged on one of the brackets 71, and the output end of the servo motor 75 is fixedly connected to the rolling shaft 74, and the cross-section of the rolling shaft 74 is elliptical. When the elliptical rolling shaft 74 rotates, the rolling shaft 74 can drive the lower hopper 73 to shake, ensuring that the material on the lower hopper 73 can be discharged evenly and avoiding the occurrence of material jamming.

[0078] The specific scheme is as follows: when using the device, the staff first moves the device to a suitable position and fixes it, and then the staff loads the material into the outer shell 5 of the device, and through the drive motor 62 set on the positioning plate 61, when the drive motor 62 is started, the rotating shaft 63 fixedly set on the output end of the drive motor 62 rotates, and when the rotating shaft 63 rotates, the pulley 661 fixedly set on the rotating shaft 63 rotates, and the stirring shaft 64 is driven to rotate through the pulley 661, and the stirring rod 65 fixedly set on the stirring shaft 64 can stir and mix the material in the device shell 5, thereby improving the efficiency of material forming, and the chute 8 set on the outer shell 5 ensures that the scraper is 81 can move along the slide 8 during the movement process to avoid position deviation and ensure the stability of the device during operation. By setting the bottom end of the shell 5 in a funnel shape, the material concentrated on the bottom of the shell 5 can slide down along the bottom end of the shell 5. The lower hopper 73 set on the shaft body 72 ensures that the material flowing out of the shell 5 can be discharged stably. The output end of the servo motor 75 is fixedly connected to the rolling shaft 74. The cross-section of the rolling shaft 74 is elliptical. When the elliptical rolling shaft 74 rotates, the rolling shaft 74 can drive the lower hopper 73 to shake, ensuring that the material on the lower hopper 73 can be discharged evenly and avoiding the occurrence of material jams.

[0079] A person skilled in the art should understand that the discussion of any of the above embodiments is only exemplary, and within the spirit of the present invention, the technical features in the above embodiments or in different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0080] The present invention is intended to cover all such substitutions, modifications and changes that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for preparing a mildew-proof and degradable soybean protein adhesive, characterized in that: include: Step 1: Soy protein pretreatment First, the soy protein powder is mixed with an appropriate amount of water and stirred to make it uniform. Then, it is heated to a certain temperature to denature the protein. Step 2: Adding modifier The pretreated soy protein solution is mixed with the modifier, the pH value is adjusted, and the mixture is stirred evenly to ensure that the modifier and the protein react fully, and the mixture is prepared from the following raw materials: 68 parts of softened water, 12 parts of defatted soy protein powder, 1.5 parts of sodium carbonate, 1.8 parts of peach gum, 1.5 parts of complexing agent, 1.5 parts of urea, and 7 parts of sapodilla residue powder; Step 3: Mixing and homogenization The mixed solution is placed in a stirring device for high-speed stirring or homogenization to improve the fluidity and uniformity of the adhesive; S1, after melting peach gum, add it into softened water and heat it to 100-110° C. and keep it for 0.5-1 hour, and keep stirring during the heating process to obtain peach gum aqueous solution; S2, adding saponin powder and urea to the peach gum aqueous solution, and maintaining the temperature at 70-0°C and stirring for 0.5-1 hour to obtain a mixed solution; S3, adding sodium carbonate and defatted soy protein powder to the mixed solution cooled to 50-70° C., heating and maintaining the temperature at 50-0° C. and stirring for 0.4-0.8 hours to obtain a mixture; S4, adding a complexing agent to the mixture after the mixture is cooled to 30-40° C. and stirring evenly to obtain a soybean protein adhesive; Step 4: Filtration and defoaming Filter the homogenized solution to remove impurities and bubbles; Step 5: Drying and molding After the above steps, the adhesive is dried and formed, and purified soybean protein is obtained through desalting, acidification and other treatments, and then heated, cooled and other treatments to make it gel to form an adhesive; The stirring device in step 3 comprises: Supporting base plate (1); A support frame (2) is fixedly connected to the support base plate (1), and the two support frames (2) are arranged parallel to each other; A connecting plate (3) fixedly connected to the supporting frame (2); A positioning ring (4) fixedly connected to the connecting plate (3); A housing (5) connected to the positioning ring (4); A stirring device (6), arranged on the outer shell (5), for stirring and mixing the material placed in the outer shell (5); A material unloading device (7) is arranged on the supporting bottom plate (1) and is used for transporting the material in the stirring device (6).

2. The method for preparing a mildew-proof and degradable soybean protein adhesive according to claim 1, characterized in that: Four mutually parallel support columns (11) are fixedly connected to the support base plate (1), and the four support columns (11) are distributed at the corners of the support base plate (1).

3. The method for preparing a mildew-proof and degradable soybean protein adhesive according to claim 1, characterized in that: The stirring device (6) comprises a positioning plate (61) fixedly connected to the outer shell (5), a driving motor (62) fixedly connected to the positioning plate (61), a rotating shaft (63) rotatably connected inside the outer shell (5), an output end of the driving motor (62) fixedly connected between the rotating shafts (63), two stirring shafts (64) parallel to each other rotatably connected to the outer shell (5), and a plurality of stirring rods (65) arranged in an interlaced manner fixedly connected to the outer circumferences of the two stirring shafts (64), and a transmission unit (66) for controlling the rotation of the stirring shafts (64) is provided on the driving motor (62).

4. The method for preparing a mildew-proof and degradable soybean protein adhesive according to claim 3, characterized in that: The transmission unit (66) comprises a pulley (661) fixedly connected to the outer circumference of the rotating shaft (63) and the stirring shaft (64), and a belt (662) is transmission-connected between the two pulleys (661).

5. The method for preparing a mildew-proof and degradable soybean protein adhesive according to claim 3, characterized in that: A sliding groove (8) is provided on the inner wall of the housing (5), a scraper plate (81) is slidably arranged on the sliding groove (8), and a control unit (82) for controlling the movement of the scraper plate (81) is arranged on the rotating shaft (63).

6. The method for preparing a mildew-proof and degradable soybean protein adhesive according to claim 5, characterized in that: The control unit (82) comprises a cylindrical cam (821) slidably connected to the outer circumference of the rotating shaft (63); a limit rod matching the cylindrical cam (821) is fixedly arranged on the outer circumference of the rotating shaft (63); and the cylindrical cam (821) is fixedly connected to the scraper (81).

7. The method for preparing a mildew-proof and degradable soybean protein adhesive according to claim 3, characterized in that: The bottom end of the shell (5) is funnel-shaped, and a second scraper (83) is rotatably connected to the bottom end inside the shell (5), and the second scraper (83) is fixedly connected to the rotating shaft (63).

8. The method for preparing a mildew-proof and degradable soybean protein adhesive according to claim 3, characterized in that: A discharge pipe (9) is fixedly connected to the bottom end of the outer shell (5), a plurality of discharge slots (91) are provided on the discharge pipe (9), and a barrier pipe (92) is slidably arranged inside the discharge pipe (9).

9. The method for preparing a mildew-proof and degradable soybean protein adhesive according to claim 1, characterized in that: The material discharge device (7) comprises a bracket (71) fixedly connected to the supporting base plate (1), an axle (72) is rotatably arranged between the two brackets (71), and a material discharge hopper (73) is rotatably connected to the axle (72).

10. The method for preparing a mildew-proof and degradable soybean protein adhesive according to claim 9, characterized in that: A rolling shaft (74) is rotatably arranged between another group of the brackets (71), a servo motor (75) is fixedly arranged on one of the brackets (71), an output end of the servo motor (75) is fixedly connected to the rolling shaft (74), and the cross section of the rolling shaft (74) is elliptical.

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