Device for efficiently preparing bacterial nanocellulose-based composite material under driving of electric field
The preparation of bacterial nanocellulose-based composite materials is solved by an electric field-driven dual electric field device, which has solved the problems of long recombination time, small processing amount and poor uniformity in the existing methods, and achieved the effects of short recombination time, large processing amount and good uniformity.
Patent Information
- Application Number
- CN202421465445.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-06-25
AI Technical Summary
The existing preparation methods for bacterial nanocellulose composite materials have problems such as long composite time, small processing volume, and poor uniformity.
The double electric field device driven by electric field is used to prepare the composite material. By setting two or three pairs of electrode terminals in the reaction tank, the electric field is driven by a DC power supply to achieve efficient recombination.
It significantly shortens the compounding time, improves the processing volume and uniformity, and has large contact surfaces and large loads, which has good industrial prospects.
Smart Images
Figure CN222805167U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of composite material preparation, and particularly relates to a device for efficiently preparing bacterial nano-cellulose-based composite materials by electric field driving. Background Art
[0002] The selection of hemostatic materials is crucial for dealing with post-traumatic bleeding. The non-adjustable shape of traditional hemostatic gauze and gelatin sponge makes them unsuitable for irregularly shaped and incompressible bleeding wounds, while hemostatic powder cannot form a stable scab on the wound surface. Therefore, it is urgent to develop a new type of hemostatic material to deal with traumatic bleeding. Bacterial nanocellulose can be used to prepare hemostatic materials because of its three-dimensional network structure similar to the extracellular matrix and a microenvironment suitable for wound healing. However, due to its single function and limited coagulation effect, bacterial nanocellulose is often compounded with other substances to improve the biological functionality of bacterial nanocellulose.
[0003] There are many strategies for the composite of bacterial nanocellulose composites, but there are also many shortcomings, such as the impregnation adsorption method often takes a long time to composite and the composite is uneven, and the chemical cross-linking method may introduce toxic substances. Therefore, it is necessary to develop a preparation method with large processing volume and short composite time. Summary of the invention
[0004] The technical problem to be solved by the utility model is to provide a device for efficiently preparing bacterial nanocellulose-based composite materials by electric field drive, which effectively solves the problems of long composite time, small processing volume and poor uniformity of conventional impregnation adsorption method.
[0005] The utility model provides an electric field driven device for efficiently preparing bacterial nanocellulose-based composite materials, comprising a reaction tank; a first positive terminal empty slot and a first negative terminal empty slot are provided at both ends of the reaction tank; a plurality of vertically placed clamps are provided in the reaction tank; a second positive terminal empty slot and a second negative terminal empty slot are provided in the gap between the clamp and the reaction tank; a direct current power supply is connected to the first positive terminal empty slot via a positive terminal electrode rod, and is connected to the first negative terminal empty slot via a negative terminal electrode rod; a cover plate is placed above the reaction tank.
[0006] The reaction tank is provided with two pairs of electrode end slots, and a dual electric field device is used to prepare the composite material. According to the actual preparation requirements, another pair of electrode ends can be provided at the upper and lower positions of the device to realize the preparation of the composite material in all directions with three electric fields. The number of the second positive end slots and the second negative end slots is less than or equal to the number of the clamps. The device can use one, two or three pairs of electrode ends in the process of preparing the composite material.
[0007] Preferably, the clamping plate is not connected to the side walls of the second positive terminal slot and the second negative terminal slot.
[0008] Preferably, the splint is detachable.
[0009] Preferably, the splint is of snap-fit type, screw type or clip type.
[0010] Preferably, the reaction tank is further provided with a cooling device, and the cooling device is coil cooling, jacket cooling or plywood cooling.
[0011] Beneficial Effects
[0012] (1) Compared with the conventional impregnation adsorption method, the utility model has the advantages of short compounding time, large processing volume and good uniformity.
[0013] (2) Compared with the composite material driven by the horizontal electric field, the utility model has the advantages of large material contact surface, large load capacity and good industrialization prospect.
[0014] (3) The dual electric field device of the utility model can realize the compounding of materials by adding different compounding factors into the electrode end empty slots in different orientations, and has a more flexible and efficient preparation process. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of the utility model.
[0016] Figure 2 This is a schematic diagram of the dual electric field distribution of the utility model. DETAILED DESCRIPTION
[0017] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.
[0018] Example 1
[0019] like Figure 1-Figure 2 As shown, a device for efficiently preparing bacterial nanocellulose-based composite materials driven by electric field is provided, including a reaction tank 7; a first positive terminal slot 51 and a first negative terminal slot 61 are provided at both ends of the reaction tank 7; a plurality of vertically placed clamps 4 are provided in the reaction tank 7; a second positive terminal slot 52 and a second negative terminal slot 62 are provided in the gap between the clamps 4 and the reaction tank 7; a DC power supply 1 is connected to the first positive terminal slot 51 through a positive terminal electrode rod 2, and is connected to the first negative terminal slot 61 through a negative terminal electrode rod 3; a cover plate 8 is placed above the reaction tank 7.
[0020] Preferably, the number of the second positive terminal slots 52 and the second negative terminal slots 62 is less than or equal to the number of the clamping plates 4 .
[0021] Preferably, the clamping plate 4 is detachable.
[0022] Preferably, the clamp 4 is of a snap-fit type, a screw type or a clip type. The snap-fit type clamp fastens the bacterial nanocellulose membrane in the clamp by means of a snap-fit key; the screw type clamp fixes the bacterial nanocellulose membrane in the clamp by means of a screw; the clip type clamp squeezes the bacterial nanocellulose membrane in the clamp by applying force.
[0023] Preferably, the reaction tank 7 is further provided with a cooling device, which is coil cooling, jacket cooling or splint cooling. Coil cooling is embedded in the wall of the reaction tank 7, and cooling is performed by the coil entering from the bottom and exiting from the top; jacket cooling is a circle of jacket wrapped around the outer periphery of the reaction tank 7, and cooling is performed by entering from the bottom and exiting from the top; splint cooling is cooling by a cooling pipe in the shape of a splint.
[0024] Example 2
[0025] (1) After Acetobacter xylinum was cultured in a liquid medium at 30°C for 3 days, the membrane was repeatedly purified in a 1% (w / v) sodium hydroxide solution, rinsed with deionized water, and sterilized by high pressure to obtain a bacterial cellulose membrane.
[0026] (2) Take the purified bacterial cellulose hydrogel, cut it into 3×3 cm pieces, and immerse it in 0.4 M acetic acid-sodium acetate buffer for 1 h.
[0027] (3) Dissolve 0.5 g collagen in 0.4 M acetic acid-sodium acetate solution at pH 5.5 to obtain a 0.5 mg / mL collagen solution.
[0028] (4) The bacterial cellulose membrane obtained in step (1) is vertically placed in the clamping plate 4 of the reaction tank 7, and 60 mL of collagen solution is injected into the first negative terminal empty slot 61.
[0029] (5) Cover the cover plate 8, set the voltage to 20 V, take out the bacterial cellulose hydrogel after treating for 3 min, and wash it with PBS three times to obtain the bacterial cellulose / collagen composite hydrogel.
Claims
1. A device for efficiently preparing bacterial nanocellulose-based composite materials driven by electric field, characterized in that: The invention comprises a reaction tank (7); a first positive terminal slot (51) and a first negative terminal slot (61) are provided at both ends of the reaction tank (7); a plurality of vertically placed clamping plates (4) are provided in the reaction tank (7); a second positive terminal slot (52) and a second negative terminal slot (62) are provided in the gap between the clamping plates (4) and the reaction tank (7); a direct current power source (1) is connected to the first positive terminal slot (51) via a positive terminal electrode rod (2), and is connected to the first negative terminal slot (61) via a negative terminal electrode rod (3); and a cover plate (8) is placed above the reaction tank (7).
2. The device according to claim 1, characterized in that: The number of the second positive terminal slots (52) and the second negative terminal slots (62) is less than or equal to the number of the clamping plates (4).
3. The device according to claim 1, characterized in that: The clamping plate (4) is detachable.
4. The device according to claim 1, characterized in that: The clamping plate (4) is of a snap-fit type, a screw type or a clip type.
5. The device according to claim 1, characterized in that: The reaction tank (7) is also provided with a cooling device, which is coil cooling, jacket cooling or clamp plate cooling.