Construction method of natural amphiprotic biomass gel artificial muscle device

文档序号:793795 发布日期:2021-04-13 浏览:6次 中文

阅读说明:本技术 一种天然双性生物质凝胶人工肌肉器件的构筑方法 (Construction method of natural amphiprotic biomass gel artificial muscle device ) 是由 杨俊杰 姚金彤 杨雄飞 王思永 马莹莹 于 2020-12-11 设计创作,主要内容包括:一种天然双性生物质凝胶人工肌肉器件的构筑方法,其特点是,包括三部分组成:首先,通过天然的高分子聚合物海藻酸钠和羧化壳聚糖进行生物交联反应,获得生物相容性优良且具有双性电致动行为的生物质凝胶电致动膜;其次,利用海藻酸钠与MXene表面官能团之间的氢键协同作用,以直接水浴共混配制出非金属电极膜溶液,其成膜后具有高电导率、耐弯折且安全无毒;最后,依次将电致动膜与电极膜溶液交替叠层构筑,形成具有类多层“汉堡”结构的人工肌肉器件,它的内部界面合成层附着良好,增强了响应变形量、可逆致动性和运动范围,即表现出十分优异的电-化学-机械性能。具有科学合理,操作简便,绿色环保,适用性强,效果佳的优点。(A construction method of a natural amphiprotic biomass gel artificial muscle device is characterized by comprising the following three parts: firstly, performing biological crosslinking reaction on natural high molecular polymer sodium alginate and carboxylated chitosan to obtain a biomass gel electric actuating membrane with excellent biocompatibility and bipolar electric actuating behavior; secondly, preparing a non-metal electrode membrane solution by using the hydrogen bond synergistic effect between sodium alginate and MXene surface functional groups and by direct water bath blending, wherein the non-metal electrode membrane solution has high conductivity, bending resistance, safety and no toxicity after the membrane is formed; finally, the electric actuating membrane and the electrode membrane solution are alternately laminated in sequence to form the artificial muscle device with a multilayer-like 'hamburger' structure, the internal interface synthetic layer of the artificial muscle device is well attached, the response deformation, the reversible actuation and the motion range are enhanced, and the excellent electro-chemical-mechanical performance is shown. Has the advantages of scientific and reasonable structure, simple operation, environmental protection, strong applicability and good effect.)

1. A construction method of a natural amphiprotic biomass gel artificial muscle device is characterized by comprising the following steps:

(1) preparing a biomass gel electric actuating membrane: sequentially adding 0.625g of sodium alginate and 0.625g of carboxylated chitosan powder into two beakers containing 25ml of distilled water respectively, placing the beakers in a water bath at 50 ℃ and stirring at a constant speed until the sodium alginate and the carboxylated chitosan powder are completely dissolved, pouring 0.2g of sodium dodecyl sulfate into the obtained blended crosslinking solution, stirring at a constant speed of 800r/min for 10min, then dropwise adding 3ml of glycerol until the solution is uniformly stirred, pouring the obtained biomass gel electric actuating membrane solution into a phi 12cm culture dish, vibrating and defoaming for 2 times in an ultrasonic cleaning machine, wherein the frequency is 15min each time and 20KHz, horizontally placing the solution in a vacuum constant-temperature drying box, drying at 50 ℃ for 28h and the vacuum degree of-0.085 MPa to obtain the biomass gel electric actuating membrane;

(2) preparing a non-metal electrode film solution: placing a beaker filled with 40ml of distilled water and 0.24g of sodium alginate in a magnetic stirrer, heating in a water bath at constant temperature of 50 ℃, uniformly stirring for 15min at 600r/min, dropwise adding 10ml of MXene aqueous dispersion which is secondarily dispersed, and continuously stirring for 15 min; then dripping less than 1ml of glycerol until the solution is fully mixed to obtain a non-metal electrode membrane solution;

(3) constructing and molding an artificial muscle device: adopting a quasi-multilayer 'hamburger' structure, and pouring and molding a biomass gel electric actuating membrane and a nonmetal electrode membrane solution in a phi 12cm culture dish in an alternating and laminated manner; after the artificial muscle is dried for 11 hours at the temperature of 50 ℃ in a vacuum constant-temperature drying box and the vacuum degree is-0.085 MPa to form a film, the film is wrapped by filter paper and horizontally placed in the center of a tray of a pneumatic hot press, the artificial muscle is subjected to isothermal and isobaric tightening and leveling correction, and the pressure value is set to be 1KPa, the temperature is 50 ℃, and the hot pressing time is set to be 15 min; finally, the artificial muscle is cut into a long strip shape, manufactured into the structure of an artificial muscle device, and sealed and stored in a PE preservative film.

2. The method for constructing a natural amphiphilic biomass gel artificial muscle device as claimed in claim 1, wherein the sodium alginate is analytically pure, 90%.

3. The method of claim 1, wherein said carboxylated chitosan is a biological agent and is water soluble.

4. The method for constructing a natural amphiphilic biomass gel artificial muscle device as claimed in claim 1, wherein the MXene aqueous dispersion has a solid content of 10.4%.

5. The method for constructing a natural amphiphilic biomass gel artificial muscle device as claimed in claim 1, wherein the sodium lauryl sulfate is chemically pure.

6. The method for constructing a natural amphiphilic biomass gel artificial muscle device as claimed in claim 1, wherein the glycerol is chemically pure at 99.0% or more.

7. The method for constructing a natural amphiphilic biomass gel artificial muscle device as claimed in claim 1, wherein in the biomass gel electrically activated membrane solution: the concentration of sodium alginate is 12.5mg/ml, and the dissolving mass ratio of sodium alginate to carboxylated chitosan is 1: 1.

8. The method for constructing a natural amphiphilic biomass gel artificial muscle device as claimed in claim 1, wherein the concentration of sodium alginate in the non-metal electrode membrane solution is 6mg/ml, and the rotation speed of the magnetic stirrer is 120 r/min.

Technical Field

The invention relates to a construction process method of an artificial muscle device, in particular to a construction method of a natural amphiprotic biomass gel artificial muscle device.

Background

Conventional power systems, such as internal combustion engines, have been widely used in various plant equipment; however, there are still many limitations such as difficulty in achieving miniaturization and forced continuous operation in order to reproduce the movement pattern of the living body. Artificial muscle, in turn, is a device that reversibly contracts and expands in response to a particular stimulus to replicate the motor behavior of an organism, similar to the phenomenon of biological muscle response to neural signals. Currently, there are many materials developed for artificial muscle devices, such as polymer fibers, elastomers, and shape memory alloys; the artificial muscle device can achieve desired performance, such as large output force and fast response speed, based on different constituent materials. However, they also have some disadvantages in common, such as a small amount of responsive deformation, poor biocompatibility, and insufficient reversible actuation. Therefore, the construction method of the natural amphiprotic biomass gel artificial muscle device with clear mechanism, simplicity, practicability, environmental protection is developed to improve the response deformation, biocompatibility, reversibility and motion range of the device, and the method has important value and significance for promoting the multi-field development and wide application of the artificial muscle device.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the construction method of the natural dual-property biomass gel artificial muscle device, which is scientific and reasonable, simple and convenient to operate, green and environment-friendly, strong in applicability and good in effect. The method selects the optimized biological crosslinking mass ratio and the construction process parameters, thereby obtaining the natural dual-property biomass gel artificial muscle device with large response deformation, good biocompatibility, quick reversible electric actuation and wide movement range; furthermore, the mechanism and the multilayer three-dimensional structure of the advanced construction method are explained, which provides a new idea for the performance construction and application development of artificial muscle devices.

The purpose of the invention is realized as follows: a construction method of a natural amphiprotic biomass gel artificial muscle device is characterized by comprising the following steps:

(1) preparing a biomass gel electric actuating membrane: sequentially adding 0.625g of sodium alginate and 0.625g of carboxylated chitosan powder into two beakers containing 25ml of distilled water respectively, placing the beakers in a water bath at 50 ℃ and stirring at a constant speed until the sodium alginate and the carboxylated chitosan powder are completely dissolved, pouring 0.2g of sodium dodecyl sulfate into the obtained blended crosslinking solution, stirring at a constant speed of 800r/min for 10min, then dropwise adding 3ml of glycerol until the solution is uniformly stirred, pouring the obtained biomass gel electric actuating membrane solution into a phi 12cm culture dish, vibrating and defoaming for 2 times in an ultrasonic cleaning machine, wherein the frequency is 15min each time and 20KHz, horizontally placing the solution in a vacuum constant-temperature drying box, drying at 50 ℃ for 28h and the vacuum degree of-0.085 MPa to obtain the biomass gel electric actuating membrane;

(2) preparing a non-metal electrode film solution: placing a beaker filled with 40ml of distilled water and 0.24g of sodium alginate in a magnetic stirrer, heating in a water bath at constant temperature of 50 ℃, uniformly stirring for 15min at 600r/min, dropwise adding 10ml of MXene aqueous dispersion which is secondarily dispersed, and continuously stirring for 15 min; then dripping less than 1ml of glycerol until the solution is fully mixed to obtain a non-metal electrode membrane solution;

(3) constructing and molding an artificial muscle device: adopting a quasi-multilayer 'hamburger' structure, and pouring and molding a biomass gel electric actuating membrane and a nonmetal electrode membrane solution in a phi 12cm culture dish in an alternating and laminated manner; after the artificial muscle is dried for 11 hours at the temperature of 50 ℃ in a vacuum constant-temperature drying box and the vacuum degree is-0.085 MPa to form a film, the film is wrapped by filter paper and horizontally placed in the center of a tray of a pneumatic hot press, the artificial muscle is subjected to isothermal and isobaric tightening and leveling correction, and the pressure value is set to be 1KPa, the temperature is 50 ℃, and the hot pressing time is set to be 15 min; finally, the artificial muscle is cut into a long strip shape, manufactured into the structure of an artificial muscle device, and sealed and stored in a PE preservative film.

Further, the sodium alginate is analytically pure, 90%.

Further, the carboxylated chitosan is a biological agent, and is water-soluble.

Further, the solid content of the MXene aqueous dispersion is approximately equal to 10.4%.

Further, the sodium lauryl sulfate is chemically pure.

Further, the glycerol is chemically pure and is more than or equal to 99.0%.

Further, in the biomass gel electroactive membrane solution: the concentration of sodium alginate is 12.5mg/ml, and the dissolving mass ratio of sodium alginate to carboxylated chitosan is 1: 1.

Further, the concentration of sodium alginate in the non-metal electrode membrane solution is 6mg/ml, and the rotating speed of the magnetic stirrer is 120 r/min.

The construction method of the natural amphiprotic biomass gel artificial muscle device has the advantages of being scientific and reasonable, simple and convenient to operate, green and environment-friendly, strong in applicability and good in effect. Further advantages are represented by:

firstly, sodium alginate is polyanionic macromolecule, and the molecular chain of the polyanionic macromolecule is rich in carboxyl; carboxylated chitosan belongs to a typical polycationic polymer, and the internal structure chain of the carboxylated chitosan contains a large number of amino groups. Therefore, the two materials can generate strong electrostatic interaction between polymer chains in aqueous solution due to the opposite charges of the two materials, and the green natural amphiprotic biomass gel polymer can be easily formed by blending and crosslinking. The composite material can generate synergistic effect on polymerization performance, further exerts the advantages of two natural polymer materials, has diversified structures, more active groups and complete biodegradation, and has great development prospect and application value when being used for constructing double-property biomass artificial muscle devices.

Secondly, the new two-dimensional ceramic material (MXene) has stable conductivity similar to that of metal and excellent hydrophilicity, and can effectively overcome the defect that graphene is susceptible to oxidation or surface modification and loses conductivity of the graphene seriously. Therefore, after MXene is doped and introduced into the sodium alginate polymer, the conductivity and the heat conductivity of the formed biomass gel polymer can be obviously improved. Furthermore, the non-metal electrode film of the artificial muscle device is prepared by utilizing the hydrogen bond action between sodium alginate and MXene surface functional groups, has good conductivity, bending resistance, safety and no toxicity, and can replace the traditional metal electrode which is easy to oxidize.

Thirdly, the biomass gel artificial muscle device is constructed in a structure form similar to a multilayer hamburger, so that the biomass gel artificial muscle device is tightly stacked and has good electric actuation orientation, and migration and accumulation of internally charged ions are promoted. Through repeated alternate pouring and gel curing of the biomass gel electric actuating membrane solution and the non-metal electrode membrane solution, a superposed network is formed around an interface between the multilayer structures of the artificial muscle device, so that the adhesion of an interface synthetic layer is good, the response deformation, the reversible actuation and the motion range of the natural dual-property biomass gel artificial muscle device are enhanced, and the excellent electro-chemical-mechanical property is shown.

Drawings

FIG. 1 is a flow chart of the construction method of the natural amphiprotic biomass gel artificial muscle device of the invention;

FIG. 2 is a schematic view of the macroscopic multi-layer structure of the natural amphiphilic biomass gel artificial muscle device of the present invention;

FIG. 3 is a scanning electron microscope image of the internal microstructure of the electrically actuated membrane layer of the biomass gel of the natural amphiphilic biomass gel artificial muscle device of the invention;

FIG. 4 is a graph of IR spectra of an electrically actuated membrane of biomass gel and its natural polymeric components sodium alginate and carboxylated chitosan for a natural amphiphilic biomass gel artificial muscle device of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings:

as shown in fig. 1, the process of the method for constructing a natural amphiphilic biomass gel artificial muscle device of the invention mainly comprises three stages: preparing a biomass gel electric actuating membrane, preparing a non-metal electrode membrane solution and constructing and forming an artificial muscle device. Meanwhile, the whole construction process is simple and controllable, high in production efficiency and environment-friendly, and the gel artificial muscle device with a similar multilayer hamburger structure can be massively realized.

(1) The preparation process of the biomass gel electric actuating membrane comprises the following steps:

first, the heating temperature of a magnetic stirrer was set to 50 ℃, and two small beakers containing 25ml of distilled water were placed in the stirrer and heated in a water bath. After the temperature reaches, 0.2g of sodium dodecyl sulfate and 0.625g of sodium alginate and carboxylated chitosan powder are respectively weighed by an electronic analytical balance for later use; and slowly pouring the mixture into distilled water along the centers of two small beakers respectively, putting the stirring magnetons, and uniformly stirring for 45min at the speed of 800 r/min. And then the two blending crosslinking solutions are completely and uniformly stirred, wherein the dissolving mass ratio of the medicine is 1: 1.

Secondly, the sodium dodecyl sulfate powder (plastic aid) to be used is evenly poured into the crosslinking solution, after the stirring is finished, 3ml of glycerol (a dropper) is gradually dripped into the solution until the solution is evenly stirred. Thus, a biomass gel electroactive membrane solution was obtained, wherein the concentration of sodium alginate-chitosan was 12.5 mg/ml. Then, the electric actuating membrane solution is put into an ultrasonic cleaning machine, and oscillation defoaming treatment is carried out for 2 times (15 min/time), and the total time is 30 min; meanwhile, the temperature is set to be 50 ℃, and the oscillation frequency is set to be 20 KHz. With continuous ultrasonic oscillation, small bubbles dispersed everywhere in the solution of the electric actuating membrane continuously float and are gathered on the surface of the solution to break to form foam; the top layer solution containing residual bubbles and foam may then be removed.

Finally, uniformly casting the solution of the biomass gel electric actuating membrane into a preheated culture dish with the diameter of 12cm, horizontally placing the culture dish into a vacuum drying oven, and performing vacuum constant-temperature drying; setting the temperature at 50 ℃, the drying time at 28h and the vacuum degree at-0.085 MPa until the electric actuating membrane solution is dried to form a membrane.

It is noted that maintaining a constant temperature and negative pressure environment in the vacuum drying oven during this process enables: on one hand, small bubbles remained in the solution of the electric actuating membrane are completely discharged so as to ensure that the dried and formed electric actuating membrane has uniform and consistent interior, smooth and flat surface and stable actuating performance; on the other hand, along with the reduction of the working pressure, the moisture diffusion rate is accelerated, and the boiling point temperature of the electric actuating membrane solution is also reduced, so that the electric actuating membrane solution can be dried in a low-temperature state, and the high molecular component structure in the electric actuating membrane solution is well protected. During the period, opening the door of the vacuum drying oven for 10min every 3h to discharge saturated water vapor in the oven; then vacuumizing again and drying at constant temperature. After the biomass gel electric actuating membrane is completely dried and formed, the vacuum drying oven is slowly cooled to achieve the annealing effect of the electric actuating membrane, increase the flexibility of the electric actuating membrane and improve the force output performance.

(2) The preparation process of the non-metal electrode membrane solution comprises the following steps:

in the first step, an aqueous dispersion of MXene materials is subjected to secondary dispersion. Placing a beaker containing 60ml of MXene water dispersion of ceramic material in the middle of a lifting table of a sound insulation box by using an ultrasonic cell crusher; the phi 12 type horn was selected and its end was immersed in the liquid surface for about 10mm to 20 mm. Meanwhile, setting the dispersion time to be 5min, the ultrasonic time to be 3s, the interval time to be 2s and the protection temperature to be 60 ℃; then, the sound insulation box is closed to prevent the ultrasonic wave from damaging the human body. The solution is subjected to ultrasonic dispersion treatment for 5 times (5 min/time), and heat dissipation is carried out for 10min at intervals each time, and the total time is 65 min.

In the second step, a small beaker containing 40ml of distilled water was placed in a magnetic stirrer and heated in a water bath at 50 ℃. After the temperature reaches, 0.24g of sodium alginate powder is weighed by an electronic analytical balance, and the sodium alginate powder is slowly poured into distilled water along the center of a small beaker; adding stirring magneton, keeping the temperature at 600r/min, and stirring at constant speed for 15min until completely dissolved. Subsequently, 10ml of the aqueous MXene dispersion dispersed twice was gradually dropped into the solution by using a syringe with a needle, and the stirring was continued for 15 minutes. Then, 4 drops of glycerol (less than 1ml) are uniformly dripped into the blending solution until the solution is fully mixed; and then preparing the non-metal electrode membrane solution, wherein the concentration of the sodium alginate is 6 mg/ml. The subsequent ultrasonic oscillation defoaming treatment step is substantially the same as the operation method and parameters of the biomass gel electrically-actuated membrane, and the details are not repeated in this section.

(3) The construction and forming process of the artificial muscle device comprises the following steps:

a quasi-multilayer 'hamburger' structure is adopted, and a biomass gel electric actuating membrane and a non-metal electrode membrane solution are sequentially poured and formed in a phi 12cm culture dish in an alternate and laminated mode. Referring to fig. 2 and fig. 3, a layer of viscous paste-like electrode membrane solution is poured into a culture dish uniformly, and after the membrane is semi-dried to form a membrane, a layer of dried and formed electric actuating membrane is covered on the membrane; pouring the viscous electrode membrane solution on the artificial muscle device again, and repeating the steps until the artificial muscle device has a 5-layer laminated structure, namely the outermost two layers and the middle layer are the electrode membranes, and the other two layers are the electric actuating membranes. The whole process is carried out in a vacuum constant-temperature drying oven (the temperature is 50 ℃, the drying time is 11h, and the vacuum degree is-0.085 MPa), and after the film is completely dried and formed, the film is taken out and wrapped by filter paper; and horizontally placing in the center of tray of pneumatic hot press, carrying out isothermal and isobaric tightening and leveling correction on artificial muscle device, setting pressure value of 1KPa, temperature of 50 deg.C, and hot pressing time of 15 min. And cutting the natural amphiprotic biomass gel artificial muscle component into long strips (the size is 35mm multiplied by 8mm multiplied by 1.076mm) by a knife, and sealing and storing the natural amphiprotic biomass gel artificial muscle component in a PE preservative film.

The best natural double-property biomass gel artificial muscle device is a 5-layer laminated structure, the outermost two layers and the middle layer are electrode films, the other two interlayers are electric actuating films, and the strip-shaped size of the device is 35mm multiplied by 8mm multiplied by 1.076 mm. In addition, the auxiliary tools that are required to be used in the whole construction method include: a syringe (20ml), tweezers, a cylinder level, qualitative filter paper (phi 12cm), a small beaker (100ml), a measuring cylinder (10ml), a rubber dropper (3ml), a PE preservative film (30m multiplied by 30cm) and disposable latex gloves.

The specific working principle is as follows:

as can be seen from the combination of FIG. 4, the muscle device has both cationic groups and anionic groups on the internal polymer chains, and combines the characteristics of polycationic and polyanionic biomass gel polymers, so that the muscle device has electric actuation responsiveness in a wider pH value range, and the application range is expanded. Specifically, the artificial muscle device is formed by directly blending and crosslinking natural high molecular polymers, namely sodium alginate and carboxylated chitosan, and a large number of amino groups and carboxyl groups are simultaneously arranged on the high molecular chain of the amphiphilic biomass gel; therefore, the response deformation and the reversible actuation are both influenced by the pH value, and the multifunctional reaction kettle has multiple functions. When the pH is higher<7, carboxylating amino group (-NH) on chitosan2) Protonation to-NH3+The artificial muscle device now has the properties of polycations and exhibits electrically actuated positive movements; at pH > 7, the carboxyl group (-COOH) on sodium alginate is ionized to-COO-The artificial muscle device becomes polyanionic in nature, exhibiting electrically actuated negative motion.

While the present invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof as defined in the appended claims.

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