CN114738216B - Skipjack meal humidity driving film and preparation method and application thereof - Google Patents
Skipjack meal humidity driving film and preparation method and application thereof Download PDFInfo
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- CN114738216B CN114738216B CN202210272953.8A CN202210272953A CN114738216B CN 114738216 B CN114738216 B CN 114738216B CN 202210272953 A CN202210272953 A CN 202210272953A CN 114738216 B CN114738216 B CN 114738216B
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/90—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation
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Abstract
A skipjack meal humidity driving film and a preparation method and application thereof belong to the field of material science, and the specific scheme is as follows: a bonito powder humidity driving film comprises a bonito powder layer, wherein the bonito powder layer has a gradient distribution of bonito powder particles from top to bottom. The preparation method comprises the following steps: the method comprises the following steps: dissolving skipjack powder in an alkaline solution, stirring to obtain a mixed solution, centrifuging the mixed solution for the first time, collecting supernatant, centrifuging the supernatant for the second time, collecting lower-layer precipitate, dissolving the precipitate in deionized water, and uniformly dispersing to obtain a skipjack powder dispersion; step two: and (3) carrying out suction filtration on the skipjack meal dispersion liquid obtained in the step one to obtain a skipjack meal suction filtration membrane, drying, and stripping from the suction filtration membrane to obtain the skipjack meal humidity driving membrane. The humidity driving film prepared by taking the skipjack powder as the raw material has biocompatibility and biodegradability, can realize controllable driving deformation under the stimulation of humidity, and has the advantages of simple preparation method, low cost and environmental friendliness.
Description
Technical Field
The invention belongs to the field of material science, and particularly relates to a bonito meal humidity driving film and a preparation method and application thereof.
Background
By simulating the environmental stimulus response behavior of natural animals and plants, researchers have developed various intelligent driving materials which can generate reversible motion response under the stimulation of external electric fields, magnetic fields, temperature, illumination and humidity, and have great potential in the fields of artificial muscles, flexible robots, generators, biomedical equipment and the like. Among them, since the humidity driving material has abundant driving energy (water molecules), and is non-contact and simple in control, it has received extensive attention from researchers in recent years.
Most of the existing humidity driving materials are made of carbon nanotubes, graphene oxide, MXene and synthetic polymers, but the synthetic materials have relatively high cost and relatively complex preparation process, and the synthetic materials are not degradable and environment-friendly. With the increasing emergence of energy crisis, environmental pollution, global warming and other problems, the development of green and environmentally friendly and sustainable humidity-driving materials is urgently needed. The skipjack meal is prepared by cutting, cooking, smoking, drying and grinding deep-sea skipjack, has biocompatibility and biodegradability, and meanwhile, skipjack meal particles have humidity response characteristics and can change in volume under the stimulation of humidity, so that the preparation of the biocompatible and biodegradable humidity-driving material based on the environment-friendly and low-cost skipjack meal has important significance.
Disclosure of Invention
The invention provides a bonito meal humidity driving film and a preparation method and application thereof, aiming at the problems of complex preparation process, higher cost, environmental friendliness and the like of the existing humidity driving material. The humidity driving film prepared by taking the skipjack powder as the raw material has biocompatibility and biodegradability, can realize controllable driving deformation under the stimulation of humidity, and has the advantages of simple preparation method, low cost and environmental friendliness.
In order to achieve the purpose, the invention adopts the following technical scheme:
a bonito powder humidity driving film comprises a bonito powder layer, wherein the number of particles of the bonito powder layer is distributed in a gradient manner from top to bottom.
Further, the thickness of the bonito powder layer is 10-60 μm.
A preparation method of a bonito meal humidity driving film 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, centrifuging the mixed solution for the first time, collecting supernatant, centrifuging the supernatant for the second time, collecting lower-layer precipitate, dissolving the precipitate in deionized water, and uniformly dispersing to obtain a skipjack powder dispersion;
step two: preparation of bonito meal humidity driving film:
and (3) carrying out suction filtration on the skipjack meal dispersion liquid obtained in the step one to obtain a skipjack meal suction filtration membrane, drying, and stripping from the suction filtration membrane to obtain the skipjack meal humidity driving membrane.
Further, in the step one, the alkaline solution is NaOH, KOH or Na 2 CO 3 、K 2 CO 3 One or more combinations of solutions.
Further, in the first step, the concentration of the alkaline solution is 0.5-5mol/L.
Further, in the first step, the mass volume ratio of the bonito powder to the alkaline solution is 0.5-5g:40-80ml.
Further, in the first step, the rotating speed of the second centrifugation is higher than that of the first centrifugation, the rotating speed of the first centrifugation is 2000-4000r/min, and the rotating speed of the second centrifugation is 8000-10000r/min.
Further, in the first step, dissolving bonito powder in alkaline solution, and magnetically stirring for 0.5-5h at 500-1000r/min.
Further, in the first step, the bonito powder is prepared by cooking, smoking, drying and crushing bonito.
Further, in the first step, the precipitate is dissolved in deionized water for vortex dispersion, the vortex rotation speed is 1000-3000r/min, and the dispersion time is 10-30min.
Further, in the second step, the thickness of the bonito meal moisture-driven film is 10 to 60 μm.
The application of a bonito powder moisture driving film is characterized in that the bonito powder moisture driving film is bent from bottom to top when the ambient humidity is increased, and is bent from top to bottom when the ambient humidity is decreased.
Compared with the prior art, the invention has the beneficial effects that:
1. the bonito meal is used as a raw material, the material cost is low, the preparation method is simple, the bonito meal has biodegradability, is environment-friendly and is a renewable resource, and the obtained bonito meal humidity driving film has good biocompatibility and can be applied to medical and wearable equipment.
2. The bonito meal humidity driving film prepared by the invention has a gradient structure, more bonito meal particles can be accumulated at the bottom of the film due to density difference in the suction filtration process, and the number of the bonito meal particles at the top of the film is less. Bonito powder particles are a hydrophilic material, and the volume of the particles expands or contracts when the ambient humidity increases or decreases. So as the humidity around the film increases, the more granular film absorbs more water molecules at the bottom, causing the bottom to swell more than at the top, and the film to bend toward the top. As the humidity decreases, the more granular film loses more water molecules at the bottom, resulting in a greater degree of bottom shrinkage than at the top, where the film bends toward the bottom. Therefore, the bonito powder humidity driving film can realize driving deformation under the relative humidity change due to the asymmetrical distribution of the bonito powder particles sensitive to humidity, namely, the bending deformation of the film can be controlled by changing the ambient humidity.
Drawings
FIG. 1 is a schematic diagram showing a moisture-driven film of bonito meal obtained in step two of example 1;
FIG. 2 is a scanning electron micrograph of the surface of a skipjack meal humidity-driven film obtained in step two of example 1, at different depths;
FIG. 3 is a graph showing a bent and deformed thin film of bonito meal humidity-driving film obtained in the second step of example 1 under different humidities;
FIG. 4 is a graph showing data on the change of curvature of a bonito meal moisture-driven film obtained in step two of example 1 at different humidities.
Detailed Description
The technical solutions of the present invention are further described below with reference to fig. 1 to 4, but the present invention is not limited thereto, and any 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 bonito powder humidity driving film comprises a bonito powder layer, wherein the bonito powder layer is distributed in a gradient manner from top to bottom in the number of particles of the bonito powder.
Further, the thickness of the bonito powder layer is 10-60 μm.
Detailed description of the invention
A preparation method of a bonito meal humidity driving film comprises the following steps:
the method comprises the following steps: preparation of skipjack meal dispersion:
dissolving 0.5-5g bonito powder in 40-80ml alkaline solution with concentration of 0.5-5mol/L, and magnetically stirring at 20-30 deg.C for 0.5-5 hr at 500-1000r/min. Centrifuging the mixed solution for the first time, controlling the centrifugal speed to be 2000-4000r/min, centrifuging for 10-20min, and collecting the supernatant. Centrifuging the supernatant for the second time at 8000-10000r/min for 10-20min, and collecting the lower precipitate. Dissolving the precipitate in 40-80ml deionized water, and performing vortex dispersion at 1000-3000r/min for 10-30min to obtain bonito powder dispersion.
Step two: preparation of bonito meal humidity driving film:
pouring the bonito powder dispersion liquid obtained in the first step into a vacuum filtration device for filtration, controlling the filtration time to be 12-24h, then placing the bonito powder dispersion liquid at 20-30 ℃ for 12-24h for natural drying, and finally stripping the bonito powder dispersion liquid from a filtration membrane to obtain the bonito powder humidity driving membrane.
The rotating speed of the second centrifugation is 4000-8000r/min higher than that of the first centrifugation, the low speed of the first centrifugation is selected to remove large-sized particles in the mixed solution, the particles are not easy to form a film and affect the performance of the film, and the high speed of the second centrifugation is selected to collect all small-sized particles remained in the mixed solution.
Further, the alkaline solution is NaOH, KOH or Na 2 CO 3 、K 2 CO 3 One or more combinations of solutions. The alkaline solution is added for hydrolyzing protein in bonito powder, and is favorable for film formation.
Further, the thickness distribution of the bonito meal moisture-driven film obtained in the second step is 10-60 μm.
Further, the skipjack meal is prepared by cooking skipjack, smoking, drying and crushing, and belongs to a commercial product.
Detailed description of the invention
The application of the bonito meal humidity driving film in the first embodiment comprises the following steps: when the ambient humidity increased, the bonito meal moisture-driving film was bent from the bottom to the top, and when the ambient humidity decreased, the bonito meal moisture-driving film was bent from the top to the bottom.
Example 1
A preparation method of a bonito meal humidity driving film is realized by the following steps:
the preparation method comprises the following steps:
dissolving 2.5g bonito powder in 40ml 2.5mol/L NaOH water solution, and magnetically stirring the mixed solution at 23 deg.C for 1 hr at 1000r/min. Centrifuging the mixed solution for the first time, controlling the centrifugal rotation speed to be 2000r/min, centrifuging for 20min, and collecting the supernatant. Centrifuging the supernatant for the second time, controlling the centrifugation speed to 10000r/min, centrifuging for 20min, and collecting the lower-layer precipitate. And dissolving the precipitate in 80ml of deionized water, and performing vortex dispersion, wherein the vortex rotation speed is controlled to be 3000r/min, and the vortex time is controlled to be 30min, so as to obtain the skipjack meal dispersion liquid.
Step two, preparing a bonito meal humidity driving film:
pouring the skipjack meal dispersion liquid obtained in the step one onto a vacuum filtration device for filtration, controlling the filtration time to be 12h, then placing at 23 ℃ for 24h for natural drying, and finally stripping from a filtration membrane to obtain the skipjack meal humidity driving membrane.
FIG. 1 is a diagram showing a thin film of the bonito meal moisture-driven film obtained in the second step of this example, in which it can be seen that the thin film has a complete surface and is a separate thin film;
fig. 2 is a scanning electron microscope image of the surfaces of the bonito meal humidity driving film with different depths obtained in the second step of the present example, from which it can be seen that the film is formed by stacking bonito meal particles, and comparing the scanning electron microscope images of three different positions, it can be found that the number of bonito meal particles increases with the increase of the film depth, which proves that the number of bonito meal particles is in gradient distribution in the depth direction of the film;
fig. 3 is a graph showing the bending deformation of the bonito meal moisture-driving film obtained in the second step of this example under different humidities, and it can be seen from the graph that the bonito meal moisture-driving film (2 mm × 20 mm) was kept in a vertical state at a relative humidity of 58%, the bonito meal moisture-driving film was bent toward the top surface when the relative humidity was increased to 92%, and the bonito meal moisture-driving film was bent toward the bottom surface when the relative humidity was decreased to 11%.
FIG. 4 is a graph showing the data of the curvature change of the bonito meal moisture-driven film obtained in the second step of this example under different humidities, and it can be found that the curvature of the bonito meal moisture-driven film increases with the increase of the relative humidity, and when the relative humidity increases from 11% to 92%, the curvature of the bonito meal moisture-driven film increases from-0.41 cm -1 Increased to 0.58cm -1 Therefore, the obtained bonito meal moisture-driving film has excellent moisture response performance.
Example 2
A preparation method of a bonito meal humidity driving film is realized by the following steps:
the preparation method comprises the following steps:
dissolving 5g bonito powder in 80ml 5mol/L NaOH water solution, and magnetically stirring at 23 deg.C for 5 hr at 1000r/min. And centrifuging the mixed solution for the first time, controlling the centrifugal rotation speed to be 4000r/min, centrifuging for 20min, and collecting supernatant. Centrifuging the supernatant for the second time, controlling the centrifugation speed to 8000r/min, centrifuging for 20min, and collecting the lower layer precipitate. And dissolving the precipitate in 40ml of deionized water, and performing vortex dispersion, wherein the vortex rotation speed is controlled to be 3000r/min, and the vortex time is controlled to be 30min, so as to obtain the skipjack meal dispersion liquid.
Step two, preparing a bonito meal humidity driving film:
pouring the skipjack meal dispersion liquid obtained in the step one onto a vacuum filtration device for filtration, controlling the filtration time to be 12h, then placing at 23 ℃ for 24h for natural drying, and finally stripping from a filtration membrane to obtain the skipjack meal humidity driving membrane.
Example 3
Step one, preparing a skipjack meal dispersion liquid:
dissolving 5g bonito powder in 80ml 5mol/L NaOH water solution, and magnetically stirring at 23 deg.C for 5 hr at 1000r/min. Centrifuging the mixed solution for the first time, controlling the centrifugal rotation speed to be 2000r/min, centrifuging for 20min, and collecting the supernatant. Centrifuging the supernatant for the second time, controlling the centrifugation speed to 10000r/min, centrifuging for 20min, and collecting the lower-layer precipitate. And dissolving the precipitate in 80ml of deionized water, and performing vortex dispersion, wherein the vortex rotation speed is controlled to be 3000r/min, and the vortex time is controlled to be 30min, so as to obtain the skipjack meal dispersion liquid.
Step two, preparing a bonito meal humidity driving film: pouring the skipjack meal dispersion liquid obtained in the step one onto a vacuum filtration device for filtration, controlling the filtration time to be 24h, then placing the dispersion liquid at 23 ℃ for 24h for natural drying, and finally peeling the dispersion liquid from the filtration membrane to obtain the skipjack meal humidity driving membrane.
Claims (10)
1. A skipjack meal humidity driving film is characterized in that: the bonito powder layer is distributed in a gradient mode from top to bottom.
2. The skipjack meal moisturizing driving film of claim 1, wherein: the thickness of the bonito powder layer is 10-60 μm.
3. The method of preparing a bonito meal moisture-driving film as claimed in claim 1 or 2, comprising the steps of:
the method comprises the following steps: preparation of bonito powder dispersion:
dissolving skipjack powder in an alkaline solution, stirring to obtain a mixed solution, centrifuging the mixed solution for the first time, collecting supernatant, centrifuging the supernatant for the second time, collecting lower-layer precipitate, dissolving the precipitate in deionized water, and uniformly dispersing to obtain a skipjack powder dispersion;
step two: preparation of bonito meal humidity-driven film:
and (4) carrying out suction filtration on the skipjack powder dispersion liquid obtained in the step one to obtain a skipjack powder suction filtration membrane, drying, and stripping the skipjack powder suction filtration membrane to obtain the skipjack powder humidity driving membrane.
4. The method of claim 3, wherein the method comprises the steps of: in the first step, the alkaline solution is NaOH, KOH or Na 2 CO 3 、K 2 CO 3 One or more combinations of solutions.
5. The method of claim 3, wherein the method comprises the steps of: in the first step, the concentration of the alkaline solution is 0.5-5mol/L.
6. The method of claim 3, wherein the film is prepared by a process comprising the steps of: in the first step, the mass volume ratio of the bonito powder to the alkaline solution is 0.5-5g.
7. The method of claim 3, wherein the method comprises the steps of: in the first step, the rotating speed of the first centrifugation is 2000-4000r/min, and the rotating speed of the second centrifugation is 8000-10000r/min.
8. The method of claim 3, wherein the method comprises the steps of: in the first step, dissolving skipjack powder in alkaline solution, and magnetically stirring for 0.5-5h at 500-1000r/min.
9. The method of claim 3, wherein the method comprises the steps of: in the first step, the precipitate is dissolved in deionized water and dispersed in a vortex mode, the vortex rotation speed is 1000-3000r/min, and the dispersion time is 10-30min.
10. The use of the bonito meal moisture-driving film of claim 1 or 2, wherein: when the ambient humidity increased, the bonito meal moisture-driving film was bent from the bottom to the top, and when the ambient humidity decreased, the bonito meal moisture-driving film was bent from the top to the bottom.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN109320742A (en) * | 2018-09-04 | 2019-02-12 | 武汉纺织大学 | Nanofiber-based bionical driving film and the preparation method and application thereof |
| CN112999885A (en) * | 2021-02-18 | 2021-06-22 | 上海工程技术大学 | MXene-GO composite membrane with humidity response and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20070184238A1 (en) * | 2006-02-06 | 2007-08-09 | Energy Related Devices, Inc. | Laminate actuators and valves |
| WO2012071426A2 (en) * | 2010-11-22 | 2012-05-31 | Presidents And Fellows Of Harvard College | Bacterial Spore Based Energy System |
| US20170146445A1 (en) * | 2015-11-19 | 2017-05-25 | President And Fellows Of Harvard College | Paper hygrosensor and method of fabrication |
| EP3857701A1 (en) * | 2018-09-28 | 2021-08-04 | University of Massachusetts | Electric power generation from ambient humidity using protein nanowires |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109320742A (en) * | 2018-09-04 | 2019-02-12 | 武汉纺织大学 | Nanofiber-based bionical driving film and the preparation method and application thereof |
| CN112999885A (en) * | 2021-02-18 | 2021-06-22 | 上海工程技术大学 | MXene-GO composite membrane with humidity response and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
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| 非对称结构的氧化石墨烯膜及其湿度驱动响应性研究;邱远游；潘凯；王铭锑;《中国化学会2017全国高分子学术论文报告会摘要集——主题I：能源高分子中国化学会会议论文集》;20171010;493 * |
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