CN114658622A - Double-layer structure humidity driver based on skipjack meal and preparation method and application thereof - Google Patents
Double-layer structure humidity driver based on skipjack meal and preparation method and application thereof Download PDFInfo
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- CN114658622A CN114658622A CN202210272213.4A CN202210272213A CN114658622A CN 114658622 A CN114658622 A CN 114658622A CN 202210272213 A CN202210272213 A CN 202210272213A CN 114658622 A CN114658622 A CN 114658622A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
- B01D37/02—Precoating the filter medium; Addition of filter aids to the liquid being filtered
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
Abstract
A double-layer structure humidity driver based on skipjack meal and a preparation method and application thereof belong to the field of material science, and the specific scheme is as follows: a double-layer structure humidity driver based on bonito powder comprises a bonito powder layer and a polycarbonate filter membrane, wherein the bonito powder layer is attached on the polycarbonate filter membrane. The preparation method of the double-layer structure humidity driver comprises the following steps: the method comprises the following steps: dissolving skipjack powder in an alkaline solution, stirring to obtain a mixed solution I, centrifuging the mixed solution I, dissolving precipitates in deionized water, uniformly dispersing to obtain a mixed solution II, and dispersing the mixed solution II by using an ultrasonic cell crusher to obtain a skipjack powder dispersion liquid; step two: and (4) carrying out suction filtration on the bonito powder dispersion liquid obtained in the first step, wherein the used suction filtration membrane is a polycarbonate suction filtration membrane, and drying to obtain the double-layer structure humidity driver. The double-layer structure humidity driver prepared by the invention has the advantages of high mechanical strength, high response speed and large driving deformation degree.
Description
Technical Field
The invention belongs to the field of material science, and particularly relates to a double-layer structure humidity driver based on skipjack meal and a preparation method and application thereof.
Background
The flexible driver can reversibly change the shape, size or displacement of the flexible driver according to various external stimuli (such as light, electricity, heat, magnetism, humidity and solvents), and has wide application prospects in the fields of flexible robots, electronic devices, wearable devices and the like. The double-layer structure humidity driver is composed of a layer of humidity sensitive material and a layer of inert material. Although significant progress has been made in the development of humidity actuators based on hydrogel, graphene oxide, carbon nanotubes and other materials, there is still a strong need to develop more cost-effective and eco-friendly humidity actuators from natural and renewable resources, considering the relatively high cost of these materials, the strict requirements on reaction conditions, and the disadvantages of environmental sustainability development. Skipjack powder is a seafood-flavored seasoning prepared from skipjack, is a natural humidity-driving material, and is prepared by swelling skipjack powder granules with water, and dehydrating and shrinking. Therefore, the preparation of the double-layer structure humidity driver by combining the natural abundant and humidity sensitive bonito powder and the inert flexible material has important significance.
Disclosure of Invention
The invention provides a double-layer structure humidity driver based on bonito meal and a preparation method and application thereof, aiming at the problems of high material cost, strict requirements on reaction conditions, environmental friendliness and the like of the existing double-layer structure humidity driver.
In order to achieve the purpose, the invention adopts the following technical scheme:
a double-layer structure humidity driver based on bonito powder comprises a bonito powder layer and a polycarbonate filter membrane, wherein the bonito powder layer is attached on the polycarbonate filter membrane.
Further, the thickness of the bonito powder layer is 2-20 μm, the thickness of the polycarbonate filter membrane is 10-30 μm, and the pore size of the polycarbonate filter membrane is 0.2-10 μm.
A preparation method of the double-layer structure humidity driver based on the bonito powder comprises the following steps:
the method comprises the following steps: preparation of skipjack meal dispersion:
dissolving skipjack powder in an alkaline solution, stirring to obtain a mixed solution I, centrifuging the mixed solution I, collecting lower-layer precipitates, dissolving the precipitates in deionized water, uniformly dispersing to obtain a mixed solution II, and dispersing the mixed solution II by using an ultrasonic cell crusher to obtain a skipjack powder dispersion liquid;
step two: preparing a double-layer structure humidity driver:
and (3) carrying out suction filtration on the skipjack meal dispersion liquid obtained in the step one, wherein the used suction filtration membrane is a polycarbonate suction filtration membrane, obtaining a polycarbonate filtration membrane attached with a skipjack powder layer after suction filtration, and drying to obtain the double-layer structure humidity driver.
Further, the bonito powder used in the first step is screened bonito powder, and the mesh number of the used screen is 200-500 meshes.
Further, in the step one, the alkaline solution is NaOH, KOH or Na2CO3、K2CO3One or more combinations of solutions.
Further, in the first step, the concentration of the alkaline solution is 1-5 mol/L.
Further, in the first step, the mass volume ratio of the bonito powder to the alkaline solution is 1-4 g: 20-100 ml.
Further, in the step one, the centrifugal rotating speed is controlled to be 6000-10000 r/min.
Further, in the first step, the power of the ultrasonic cell crusher is controlled to be 100-500W.
Further, in the first step, the bonito powder is prepared by cooking, smoking, drying and crushing bonito.
The application of the double-layer structure humidity driver based on the bonito powder is characterized in that when the ambient humidity is increased, the double-layer structure humidity driver is changed from a rolling state to a unfolding state, and when the ambient humidity is reduced, the double-layer structure humidity driver is deformed and recovered.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, a layer of bonito meal particles sensitive to humidity is filtered on a polycarbonate filter membrane which has excellent mechanical properties and is not sensitive to humidity, and a curled double-layer structure humidity driver is obtained by utilizing internal stress generated by water loss shrinkage of the bonito meal particles in the filtering and drying process. Because the bonito powder layer has the humidity response characteristic and a close packing structure, when the humidity of the surrounding environment of the double-layer structure driver is increased, the bonito powder layer expands, and the volume of the polycarbonate filter membrane is not changed, so that the double-layer structure humidity driver deforms and changes from a curling state to a spreading state. When the ambient humidity is reduced, the dual-layer structure humidity driver is deformed and restored to the initial state. The invention takes the skipjack meal as the raw material, has low material cost, simple processing method and environmental protection. The prepared double-layer structure humidity driver is high in mechanical strength, high in response speed and large in driving deformation degree.
Drawings
FIG. 1 is a scanning electron microscope cross-sectional view of the humidity driver with a two-layer structure obtained in step three of example 1;
FIG. 2 is a diagram showing the response of the humidity driver with a double-layer structure obtained in step three of example 1 after humidity changes;
FIG. 3 is a graph of bending angle data of the humidity driver with a dual-layer structure obtained in step three of example 1 under different humidities.
Detailed Description
The technical solutions of the present invention are further described below with reference to fig. 1 to 3, but the present invention is not limited thereto, and modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Detailed description of the invention
A double-layer structure humidity driver based on bonito powder comprises a bonito powder layer and a polycarbonate filter membrane, wherein the bonito powder layer is attached on the polycarbonate filter membrane.
Further, the thickness of the bonito powder layer is 2-20 μm, the thickness of the polycarbonate filter membrane is 10-30 μm, and the pore size of the polycarbonate filter membrane is 0.2-10 μm.
Detailed description of the invention
A method for preparing a bonito meal based two-layer structure humidity actuator according to a first embodiment, comprising the steps of:
step one, preparing skipjack meal:
grinding 10-30g of bonito powder in a ball mill at a rotation speed of 800-.
Step two, preparing a skipjack meal dispersion liquid:
dissolving 1-4g of the first screened bonito powder in 20-100ml of 1-5mol/L alkaline solution, magnetically stirring at room temperature for 1-5h to obtain a mixed solution I, and controlling the magnetic stirring speed at 500-. And (3) centrifuging the mixed solution I, controlling the centrifugation rotation speed of 6000-10000r/min, centrifuging for 10-20min, and collecting the lower-layer precipitate. Dissolving the precipitate in 40-80ml of deionized water, performing vortex dispersion to obtain a mixed solution II, and controlling the vortex rotation speed to be 1000-3000r/min and the vortex time to be 10-30 min. And dispersing the mixed solution II by using an ultrasonic cell crusher at the power of 100-500W for 5-20min to obtain the bonito powder dispersion.
Step three: preparing a double-layer structure humidity driver:
and (3) pouring the bonito powder dispersion liquid obtained in the second step into a vacuum filtration device for filtration, selecting a polycarbonate filter membrane with the aperture of 0.2-10 mu m for the filtration membrane, controlling the filtration time to be 12-24h to obtain the polycarbonate filter membrane attached with the bonito powder layer, then placing the polycarbonate filter membrane at room temperature for 12-24h for natural drying, and finally obtaining the double-layer structure humidity driver.
Further, the alkaline solution is NaOH, KOH, Na2CO3、K2CO3One or more combinations of solutions.
Further, the skipjack meal is prepared by cooking skipjack, smoking, drying and crushing, and belongs to a commercial product.
Detailed description of the invention
Embodiment one application of the bonito meal based double-layer structure humidity actuator: when the ambient humidity is increased, the double-layer structure humidity driver is changed from a rolling state to a spreading state, and when the ambient humidity is reduced, the double-layer structure humidity driver is deformed and recovered.
The following examples are employed to demonstrate the beneficial effects of the present invention
Example 1
A double-layer structure humidity driver based on skipjack meal and a preparation method thereof comprise the following steps:
the preparation method comprises the following steps: grinding 30g of bonito powder in a ball mill at 800r/min for 5h, sieving with 500 mesh sieve, and collecting the powder.
Step two, preparing a skipjack meal dispersion liquid: taking 4g of the screened bonito powder obtained in the first step, dissolving the bonito powder in 80ml of 5mol/L NaOH aqueous solution, and magnetically stirring the solution at room temperature for 5 hours to obtain a mixed solution I, wherein the magnetic stirring speed is controlled to be 1000 r/min. And (4) centrifuging the mixed solution I, controlling the centrifugal rotation speed to 10000r/min, centrifuging for 20min, and collecting the lower-layer precipitate. Dissolving the precipitate in 80ml of deionized water, performing vortex dispersion to obtain a mixed solution II, and controlling the vortex rotation speed to be 3000r/min and the vortex time to be 30 min. And dispersing the mixed solution II by using an ultrasonic cell crusher at the power of 200W for 20min to obtain a bonito powder dispersion.
Step three: preparing a double-layer structure humidity driver: and (4) pouring the bonito powder dispersion liquid obtained in the second step onto a vacuum filtration device for filtration, selecting a polycarbonate filter membrane with the aperture of 0.2 mu m for the filtration membrane, controlling the filtration time to be 12h to obtain the polycarbonate filter membrane attached with the bonito powder layer, then standing at room temperature for 24h for natural drying, and finally obtaining the double-layer structure humidity driver.
FIG. 1 is a scanning electron microscope cross-sectional view of the double-layered humidity driver obtained in the third step of this example, which shows that the humidity driver has a distinct double-layered structure, the lower layer is a polycarbonate filter membrane and has a thickness of 20 μm, and the upper layer is formed by tightly packing bonito powder particles and has a thickness of 5 μm.
Fig. 2 is a diagram showing a response of the humidity-variable dual-layer humidity actuator obtained in step three of this embodiment, and it can be found that the dual-layer humidity actuator has good flexibility, and when the ambient humidity increases, the coiled dual-layer humidity actuator is completely unfolded.
Fig. 3 is a graph of data of bending angles of the dual-layer structure humidity driver obtained in step three of this embodiment under different humidities, the dual-layer structure humidity driver is cut into 2mm × 20mm rectangular strips, and is placed in an environment with different humidities, and the deflection angle of the dual-layer structure humidity driver is measured, and it can be found from the graph that when the relative humidity is increased from 23% to 95%, the deflection angle of the thin film is increased from 0 ° to 375 °, which proves that the obtained dual-layer structure humidity driver has excellent humidity response performance.
Example 2
A double-layer structure humidity driver based on bonito powder and a preparation method thereof comprise the following steps:
step one, preparing skipjack meal: grinding 30g of bonito powder in a ball mill at 800r/min for 5h, sieving with 200 mesh sieve, and collecting the powder.
Step two, preparing a skipjack meal dispersion liquid: 4g of the screened bonito meal obtained in the first step is dissolved in 80ml of a 5mol/L NaOH aqueous solution, and the mixture is magnetically stirred for 5 hours at room temperature to obtain a mixed solution I, wherein the magnetic stirring speed is controlled to be 1000 r/min. And (4) centrifuging the mixed solution I, controlling the centrifugal rotation speed to 10000r/min, centrifuging for 20min, and collecting the lower-layer precipitate. Dissolving the precipitate in 80ml of deionized water, performing vortex dispersion to obtain a mixed solution II, and controlling the vortex rotation speed to be 3000r/min and the vortex time to be 30 min. And dispersing the mixed solution II by using an ultrasonic cell crusher at a power of 500W for 20min to obtain a bonito powder dispersion.
Step three: preparing a double-layer structure humidity driver: and (3) pouring the bonito powder dispersion liquid obtained in the step two onto a vacuum filtration device for filtration, selecting a polycarbonate filter membrane with the aperture of 0.2 mu m for the filtration membrane, controlling the filtration time to be 12h to obtain the polycarbonate filter membrane attached with the bonito powder layer, then standing at room temperature for 24h for natural drying, and finally obtaining the double-layer structure humidity driver.
Example 3
A double-layer structure humidity driver based on skipjack meal and a preparation method thereof comprise the following steps:
the preparation method comprises the following steps: grinding 30g of bonito powder in a ball mill at 800r/min for 5h, sieving with 500 mesh sieve, and collecting the powder.
Step two, preparing a skipjack meal dispersion liquid: 4g of the screened bonito meal obtained in the first step is dissolved in 100ml of a 5mol/L NaOH aqueous solution, and the mixture is magnetically stirred for 5 hours at room temperature to obtain a mixed solution I, wherein the magnetic stirring speed is controlled to be 1000 r/min. And (3) centrifuging the mixed solution I, controlling the centrifugal rotation speed to be 8000r/min, centrifuging for 20min, and collecting the lower-layer precipitate. Dissolving the precipitate in 80ml of deionized water, performing vortex dispersion to obtain a mixed solution II, and controlling the vortex rotation speed to be 3000r/min and the vortex time to be 30 min. And dispersing the mixed solution II by using an ultrasonic cell crusher at a power of 200W for 20min to obtain a bonito powder dispersion.
Step three: preparing a double-layer structure humidity driver: and (3) pouring the bonito powder dispersion liquid obtained in the step two onto a vacuum filtration device for filtration, selecting a polycarbonate filter membrane with the aperture of 0.2 mu m for the filtration membrane, controlling the filtration time to be 12h to obtain the polycarbonate filter membrane attached with the bonito powder layer, then standing at room temperature for 24h for natural drying, and finally obtaining the double-layer structure humidity driver.
The double-layer structure humidity driver is prepared by combining bonito meal particles with humidity sensitivity and a polycarbonate filter membrane through a vacuum filtration technology. Due to the internal stress generated by water loss shrinkage of the skipjack meal particles, the obtained double-layer structure humidity driver is in a curled state in the initial state, and when the ambient environment humidity is increased, the double-layer structure humidity driver is unfolded, so that the driving deformation of humidity regulation is realized. The raw material of the invention is the bonito meal with low cost and environmental protection, the preparation method is simple, and the double-layer structure humidity driver has high mechanical strength, fast response speed and large driving deformation degree.
Claims (10)
1. The utility model provides a bilayer structure humidity driver based on skipjack powder which characterized in that: the bonito powder layer is attached to the polycarbonate filter membrane.
2. The bonito meal-based two-layer structure humidity actuator of claim 1, wherein: the thickness of the bonito powder layer is 2-20 μm, and the thickness of the polycarbonate filter membrane is 10-30 μm.
3. The method of manufacturing a bonito meal based two-layer structure humidity actuator of claim 1 or 2, comprising the steps of:
the method comprises the following steps: preparation of skipjack meal dispersion:
dissolving skipjack powder in an alkaline solution, stirring to obtain a mixed solution I, centrifuging the mixed solution I, collecting lower-layer precipitates, dissolving the precipitates in deionized water, uniformly dispersing to obtain a mixed solution II, and dispersing the mixed solution II by using an ultrasonic cell crusher to obtain a skipjack powder dispersion liquid;
step two: preparing a double-layer structure humidity driver:
and (3) carrying out suction filtration on the skipjack meal dispersion liquid obtained in the step one, wherein the used suction filtration membrane is a polycarbonate suction filtration membrane, obtaining a polycarbonate filtration membrane attached with a skipjack powder layer after suction filtration, and drying to obtain the double-layer structure humidity driver.
4. The method according to claim 3, wherein the bonito powder used in the first step is screened bonito powder, and the mesh size of the screen used is 200-500 mesh.
5. The production method according to claim 3, characterized in that: in the first step, the alkaline solution is NaOH, KOH or Na2CO3、K2CO3One or more combinations of solutions.
6. The production method according to claim 3, characterized in that: in the first step, the concentration of the alkaline solution is 1-5 mol/L.
7. The production method according to claim 3, characterized in that: in the first step, the mass volume ratio of the bonito meal to the alkaline solution is 1-4 g: 20-100 ml.
8. The production method according to claim 3, characterized in that: in the first step, the centrifugal rotation speed is controlled to be 6000-.
9. The production method according to claim 3, characterized in that: in the first step, the power of the ultrasonic cell crusher is controlled to be 100-500W.
10. The use of the bonito meal-based two-layer structure humidity actuator of claim 1 or 2, wherein: the dual-layer structure humidity actuator changes from a rolled state to a unrolled state when ambient humidity increases, and the dual-layer structure humidity actuator is deformed to recover when the ambient humidity decreases.
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| WO2018089924A2 (en) * | 2016-11-11 | 2018-05-17 | The Trustees Of Columbia University In The City Of New York | Systems and methods for fabricating water-responsive actuators |
| CN112520685A (en) * | 2020-12-04 | 2021-03-19 | 青岛大学 | Double-layer thin film actuator and preparation method thereof |
| CN113702599A (en) * | 2021-09-26 | 2021-11-26 | 中国计量大学 | MOFs-based mixed film for humidity sensing and driving and preparation method thereof |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070184238A1 (en) * | 2006-02-06 | 2007-08-09 | Energy Related Devices, Inc. | Laminate actuators and valves |
| US20170067452A1 (en) * | 2010-11-22 | 2017-03-09 | President And Fellows Of Harvard College | Bacterial spore based energy system |
| WO2018089924A2 (en) * | 2016-11-11 | 2018-05-17 | The Trustees Of Columbia University In The City Of New York | Systems and methods for fabricating water-responsive actuators |
| CN107297929A (en) * | 2017-06-16 | 2017-10-27 | 福建师范大学 | Activate material and compound bending type actuator and preparation method thereof |
| KR20170083012A (en) * | 2017-07-07 | 2017-07-17 | 서울대학교산학협력단 | Actuator and method for manufacturing same, and robot |
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| CN113702599A (en) * | 2021-09-26 | 2021-11-26 | 中国计量大学 | MOFs-based mixed film for humidity sensing and driving and preparation method thereof |
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