CN112898954A - Pleurotus eryngii based photothermal conversion material and preparation method thereof - Google Patents
Pleurotus eryngii based photothermal conversion material and preparation method thereof Download PDFInfo
- Publication number
- CN112898954A CN112898954A CN202110085292.3A CN202110085292A CN112898954A CN 112898954 A CN112898954 A CN 112898954A CN 202110085292 A CN202110085292 A CN 202110085292A CN 112898954 A CN112898954 A CN 112898954A
- Authority
- CN
- China
- Prior art keywords
- pleurotus eryngii
- conversion material
- photothermal conversion
- preparation
- freezing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 139
- 244000252132 Pleurotus eryngii Species 0.000 title claims abstract description 137
- 235000001681 Pleurotus eryngii Nutrition 0.000 title claims abstract description 133
- 239000000463 material Substances 0.000 title claims abstract description 110
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- CTENFNNZBMHDDG-UHFFFAOYSA-N Dopamine hydrochloride Chemical compound Cl.NCCC1=CC=C(O)C(O)=C1 CTENFNNZBMHDDG-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229960001149 dopamine hydrochloride Drugs 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 27
- 239000012295 chemical reaction liquid Substances 0.000 claims abstract description 11
- 238000006011 modification reaction Methods 0.000 claims abstract description 10
- 238000007710 freezing Methods 0.000 claims description 44
- 230000008014 freezing Effects 0.000 claims description 44
- 239000000243 solution Substances 0.000 claims description 36
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 27
- 238000003756 stirring Methods 0.000 claims description 19
- 239000007864 aqueous solution Substances 0.000 claims description 17
- 239000003513 alkali Substances 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 4
- 239000002352 surface water Substances 0.000 claims description 3
- 238000003760 magnetic stirring Methods 0.000 claims description 2
- 238000004321 preservation Methods 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 10
- 238000009777 vacuum freeze-drying Methods 0.000 abstract description 9
- 230000005540 biological transmission Effects 0.000 abstract description 8
- VYFYYTLLBUKUHU-UHFFFAOYSA-N dopamine Chemical compound NCCC1=CC=C(O)C(O)=C1 VYFYYTLLBUKUHU-UHFFFAOYSA-N 0.000 abstract description 8
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 230000015556 catabolic process Effects 0.000 abstract description 5
- 238000006731 degradation reaction Methods 0.000 abstract description 5
- 229960003638 dopamine Drugs 0.000 abstract description 4
- 238000005520 cutting process Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 17
- 230000006872 improvement Effects 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 239000002585 base Substances 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 239000002028 Biomass Substances 0.000 description 4
- 241000282414 Homo sapiens Species 0.000 description 4
- 240000002853 Nelumbo nucifera Species 0.000 description 4
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 4
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 229910021389 graphene Inorganic materials 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 238000004108 freeze drying Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- AWFYPPSBLUWMFQ-UHFFFAOYSA-N 2-[5-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-1,3,4-oxadiazol-2-yl]-1-(1,4,6,7-tetrahydropyrazolo[4,3-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1=NN=C(O1)CC(=O)N1CC2=C(CC1)NN=C2 AWFYPPSBLUWMFQ-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012620 biological material Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229920000547 conjugated polymer Polymers 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000010840 domestic wastewater Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002159 nanocrystal Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/14—Solid materials, e.g. powdery or granular
Abstract
The invention provides a pleurotus eryngii based photothermal conversion material and a preparation method thereof. And cutting the pleurotus eryngii according to the growth direction of the pleurotus eryngii, then carrying out vacuum freeze drying on the pleurotus eryngii, then placing the pleurotus eryngii into a photothermal conversion material modification reaction liquid, reacting for a certain time to enable the photothermal conversion material to be adsorbed on the porous structure of the pleurotus eryngii and the surface of the pleurotus eryngii, and carrying out vacuum freeze drying on the pleurotus eryngii to obtain the pleurotus eryngii based photothermal conversion material. The invention skillfully adheres dopamine on the surface and the hole wall of the pleurotus eryngii by utilizing the super-strong adhesiveness of the dopamine hydrochloride and the porosity of the pleurotus eryngii to obtain the photothermal conversion material integrating the photothermal conversion part, the heat preservation part and the water transmission part. The water can be automatically transported from bottom to top through the wicking effect, the heat can be preserved to reduce the heat loss, and the method has the characteristics of low cost, simple operation, natural degradation, environmental friendliness and the like.
Description
Technical Field
The invention relates to the technical field of solar photo-thermal conversion evaporation, in particular to a pleurotus eryngii based photo-thermal conversion material and a preparation method thereof.
Background
Along with the scientific progress and the continuous improvement of the quality of life of human beings, the demand of human beings on various resources is higher and higher, the pressure on the environment is higher and higher, and the energy shortage and the environmental pollution are difficult problems which are puzzled around the world. The shortage of fresh water resources, domestic wastewater, factory wastewater, dye wastewater and the like are continuously discharged, so that the water resources which can be directly used by human beings are less and less, and how to treat sewage by using clean energy and avoid secondary pollution is an important research direction for solving the shortage of fresh water resources. The photothermal conversion material is a material which converts sunlight energy into heat energy by absorbing the sunlight energy, belongs to a clean energy material and has no pollution to the environment. The photothermal conversion material is applied to the water evaporation technology, and has important significance for seawater desalination and sewage treatment.
Patent CN109575886A discloses a method for preparing a photothermal conversion material based on lotus leaves, which is to freeze and freeze-dry natural lotus leaves, and then carbonize the lotus leaves in nitrogen at high temperature to prepare black carbonized lotus leaves. The photothermal conversion material prepared by the method has good photothermal conversion efficiency, is simple in preparation method, is prepared by adopting natural materials, and is environment-friendly. However, the photothermal conversion material prepared by the method is a thin black film, has low mechanical properties and is easy to damage in practical application, and the photothermal conversion material prepared by the method has no functions of automatic water absorption and heat preservation, needs additional components for assembly, and is complex to operate. The patent CN110924194A discloses a preparation method of a high-efficiency photothermal steam conversion material, which adopts a printing method, firstly a waterproof agent is printed on a viscose fabric, then a graphene oxide dispersion liquid is printed on the waterproof agent viscose fabric and is soaked in a cross-linking liquid for two times, and finally the fabric is soaked in a reducing liquid and is taken out, cleaned and dried. The photothermal conversion material prepared by the method has the advantages of high conversion efficiency, flexibility, automatic water absorption and the like. However, the photothermal conversion material prepared by the method has the disadvantages of complicated steps, many raw material types and chemical reactions, poor environmental friendliness, high price of graphene oxide and high manufacturing cost.
The existing photothermal conversion material uses less biological materials as base materials, uses more modified materials of graphene and derivatives thereof, greatly improves the material cost, mostly needs to be assembled for many times, and has less materials integrating water absorption, heat preservation and photothermal conversion into a whole.
In view of the above, there is a need to design an improved method for preparing natural photothermal conversion material to solve the above problems.
Disclosure of Invention
The invention aims to provide a pleurotus eryngii based photothermal conversion material and a preparation method thereof. The method adopts cheap and easily available biomass material pleurotus eryngii as a matrix, cuts the substrate according to the growth direction, carries out vacuum freeze drying, and then adsorbs the material with high sunlight absorption rate. By utilizing the porous structure of the pleurotus eryngii, the photothermal conversion material integrating the photothermal conversion part, the heat preservation part and the moisture transmission part is obtained. The water can be automatically transported from bottom to top through the wicking effect, the heat loss can be reduced through heat preservation, and the method has the characteristics of low cost, simplicity in operation, natural degradation, environmental friendliness and the like.
In order to realize the purpose, the invention provides a preparation method of a pleurotus eryngii based photothermal conversion material, which comprises the following steps:
s1, ultrasonically cleaning pleurotus eryngii cut into a preset columnar body by using deionized water, taking out and removing surface moisture, freezing for 6-24 hours at the temperature of-20 to-5 ℃, and then freezing for 48-96 hours at the temperature of-80 to-20 ℃ in a vacuum environment to obtain pretreated pleurotus eryngii;
s2, preparing a photo-thermal conversion material modified reaction solution;
s3, placing the pretreated pleurotus eryngii obtained in the step S1 into the photo-thermal conversion material modification reaction liquid obtained in the step S2, stirring and reacting for 6-12 hours, taking out and removing surface water, freezing for 6-24 hours at the temperature of minus 20-minus 5 ℃, and then freezing for 48-96 hours at the temperature of minus 80-minus 20 ℃ in a vacuum environment to obtain the pleurotus eryngii-based photo-thermal conversion material.
As a further improvement of the present invention, in step S2, the photothermal conversion material-modified reaction liquid is a dopamine hydrochloride reaction liquid.
As a further improvement of the present invention, the preparation method of the dopamine hydrochloride reaction solution comprises: preparing a dopamine hydrochloride aqueous solution with the concentration of 1-4 g/L, and then adjusting the pH value of the dopamine hydrochloride aqueous solution to 8.0-8.5 by using an alkali solution to obtain the dopamine hydrochloride reaction solution.
As a further improvement of the invention, the alkali solution is a sodium hydroxide aqueous solution with the concentration of 0.1-1 mol/L.
As a further improvement of the present invention, in step S1, the predetermined cylindrical body includes, but is not limited to, a cylinder, a cuboid or a cube, and the height direction of the predetermined cylindrical body is the same as the growth direction of the pleurotus eryngii.
As a further improvement of the invention, the diameter of the cylinder is 2-5 cm, and the height of the cylinder is 2-8 cm; the cuboid is 2-5 cm long, 2-5 cm wide and 2-8 cm high; the side length of the cube is 2-5 cm.
As a further improvement of the invention, in step S1, the ultrasonic cleaning is carried out at 80-100 Hz.
In a further improvement of the present invention, in step S3, the temperature of the photothermal conversion material modification reaction liquid is 20 to 35 ℃, and the stirring speed of the stirring reaction is 200 to 500 r/min.
As a further improvement of the invention, in the steps S1 and S3, the vacuum degree of the vacuum environment is 1-10 Pa.
The pleurotus eryngii based photothermal conversion material is prepared by the preparation method.
The invention has the beneficial effects that:
1. the pleurotus eryngii based photothermal conversion material provided by the invention takes pleurotus eryngii as a base material and is cut into columnar bodies according to the growth direction of the pleurotus eryngii, so that the height direction of the columnar bodies is the same as the growth direction of the pleurotus eryngii. Then, vacuum freeze drying is carried out, and a porous biomass matrix with better mechanical property can be obtained; and then placing the material into a photothermal conversion material modification reaction solution, reacting for a certain time to enable the photothermal conversion material to be uniformly adsorbed on the porous structure and the surface of the pleurotus eryngii, and finally further carrying out freeze drying to obtain the pleurotus eryngii based photothermal conversion material with high photothermal conversion efficiency and mechanical strength. By the operation, the porous structure in the growth direction of the pleurotus eryngii can be well utilized, and the photothermal conversion material integrating the light-heat collecting conversion part, the heat preservation part and the water transmission part is obtained. The photothermal conversion material can automatically transport water from bottom to top through a wicking effect, can also preserve heat to reduce heat loss, and has the characteristics of low cost, simplicity in operation, natural degradation, environmental friendliness and the like.
2. According to the invention, dopamine hydrochloride with strong adsorbability is preferably selected as a photothermal conversion material solution, and the pH value of the solution is controlled within the range of 8.0-8.5, so that the reaction activity is optimal, and the pleurotus eryngii structure is not damaged. The super-strong adhesiveness of dopamine hydrochloride and the porosity of pleurotus eryngii are utilized to skillfully adhere the dopamine on the surface and the pore walls of the pleurotus eryngii, so that the photothermal conversion material integrating the photothermal conversion part, the heat preservation part and the water transmission part is obtained.
3. The natural edible fungus pleurotus eryngii is used as a base material, the excellent photothermal conversion performance is obtained through simple modification, the raw material source is wide, the natural edible fungus pleurotus eryngii can be artificially bred in a large amount, the natural edible fungus pleurotus eryngii can be obtained all the year round, the price is low, the cost is low, and the natural edible fungus pleurotus eryngii can be produced in a large scale. The pleurotus eryngii-based photothermal conversion material prepared by the invention is environment-friendly, can be naturally degraded, is non-toxic and harmless to human bodies, animals and plants and has good safety performance. (ii) a
Drawings
In fig. 1, a1 and a2 are SEM images of different magnifications of the inner cross section of the pleurotus eryngii-based photothermal material, and b1 and b2 are SEM images of different magnifications of the inner longitudinal section of the pleurotus eryngii-based photothermal material;
FIG. 2 is a distribution diagram of the aperture of Pleurotus eryngii based photothermal material;
FIG. 3 is a graph showing the change of photothermal efficiency with time of the Pleurotus eryngii-based photothermal conversion material prepared in example 1 and Pleurotus eryngii and pure water.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in detail below with reference to specific embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the scheme of the present invention are shown in the specific embodiments, and other details not closely related to the present invention are omitted.
In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention provides a preparation method of a pleurotus eryngii based photothermal conversion material, which comprises the following steps:
s1, ultrasonically cleaning pleurotus eryngii cut into a preset columnar body by using deionized water, taking out and removing the water on the surface of the pleurotus eryngii, freezing the pleurotus eryngii at the temperature of minus 20-minus 5 ℃ for 6-24 hours, and then freezing the pleurotus eryngii at the temperature of minus 80-minus 20 ℃ for 48-96 hours in a vacuum environment to obtain the pretreated pleurotus eryngii.
The cut pleurotus eryngii is frozen for 6-24 hours in an environment with the temperature of-20 to-5 ℃, because the temperature of-20 ℃ is completely enough to freeze the water in the pleurotus eryngii, a large amount of energy is wasted due to the excessively low temperature, and when the temperature is higher than-5 ℃, the freezing speed is slow. The freezing time is selected to be 6-24 h, and when the freezing time is higher than 24h, the pleurotus eryngii is completely frozen, so that high energy consumption is caused; when the time is less than 6 hours, the pleurotus eryngii cannot be completely frozen. The reason that the temperature of vacuum freeze-drying is-80 to-20 ℃ is that the freeze-drying speed is too high and the structure of the pleurotus eryngii is damaged when the temperature is higher than-20 ℃, while the reason that the structure of the pleurotus eryngii can be well maintained when the temperature is higher than-80 ℃ is that the environment lower than-80 ℃ needs a large amount of energy and energy is wasted.
S2, preparing a photo-thermal conversion material modified reaction solution. The photothermal conversion material is selected from inorganic nano photothermal conversion materials (such as precious metal nanocrystals of Au, Ag, Pt, Pd and the like), carbon nano photothermal conversion materials (such as carbon nano materials of graphite, carbon nano tubes, graphene and the like) or conjugated polymer photothermal conversion materials. The photothermal conversion material modified reaction solution is preferably a reaction solution prepared from a photothermal conversion material with good adsorbability.
S3, placing the pretreated pleurotus eryngii obtained in the step S1 into the photo-thermal conversion material modification reaction liquid obtained in the step S2, carrying out magnetic stirring reaction for 6-12 hours, taking out and removing surface water of the pleurotus eryngii, freezing the pleurotus eryngii at the temperature of-20 to-5 ℃ for 6-24 hours, and then freezing the pleurotus eryngii at the temperature of-80 to-20 ℃ for 48-96 hours in a vacuum environment to obtain the pleurotus eryngii based photo-thermal conversion material.
According to the technical scheme, the pleurotus eryngii is used as a base material and cut into the columnar bodies according to the growth direction of the pleurotus eryngii, so that the height direction of the columnar bodies is the same as the growth direction of the pleurotus eryngii. Then, vacuum freeze drying is carried out, and a porous biomass matrix with better mechanical property can be obtained; and then placing the material into a photothermal conversion material modification reaction liquid, reacting for a certain time to enable the photothermal conversion material to be uniformly adsorbed in a porous structure of pleurotus eryngii, and finally performing further freeze drying to obtain the pleurotus eryngii-based photothermal conversion material with high photothermal conversion efficiency and mechanical strength. The invention can well utilize the porous structure in the growth direction of the pleurotus eryngii to obtain the photothermal conversion material integrating the light-heat collecting conversion part, the heat preservation part and the moisture transmission part. The photothermal conversion material can automatically transport water from bottom to top through a wicking effect, can also preserve heat to reduce heat loss, and has the characteristics of low cost, simplicity in operation, natural degradation, environmental friendliness and the like.
In step S2, the photothermal conversion material modification reaction liquid is preferably a dopamine hydrochloride reaction liquid. The super-strong adhesiveness of dopamine hydrochloride and the porosity of pleurotus eryngii are utilized to skillfully adhere the dopamine on the surface and the pore walls of the pleurotus eryngii, so that the photothermal conversion material integrating the photothermal conversion part, the heat preservation part and the water transmission part is obtained.
The preparation method of the dopamine hydrochloride reaction solution comprises the following steps: preparing a dopamine hydrochloride aqueous solution with the concentration of 1-4 g/L, and then adjusting the pH value of the dopamine hydrochloride aqueous solution to 8.0-8.5 by using an alkali solution to obtain the dopamine hydrochloride reaction solution. The concentration of the dopamine hydrochloride solution is lower than 1g/L, so that the reaction is insufficient, and the concentration of the dopamine hydrochloride solution is higher than 4g/L, so that the dopamine hydrochloride is wasted. The pH value of the dopamine hydrochloride reaction solution is lower than 8.0, so that the reaction activity is insufficient, the reaction speed is slow, and the structure of pleurotus eryngii can be damaged when the pH value is higher than 8.5.
The alkali solution is a sodium hydroxide aqueous solution with the concentration of 0.1-1 mol/L. When the solubility of the sodium hydroxide solution is lower than 0.1mol/L, a large amount of sodium hydroxide solution is needed, the adding time is greatly prolonged, and when the solubility of the sodium hydroxide solution is higher than 1mol/L, the pH value change is large, and the control is inconvenient. The sodium hydroxide solution can be purchased directly or prepared in a laboratory.
In step S1, the predetermined cylinder includes, but is not limited to, a cylinder, a cuboid, or a cube, and the height direction of the predetermined cylinder is the same as the growth direction of the pleurotus eryngii.
The diameter of the cylinder is 2-5 cm, and the height of the cylinder is 2-8 cm; the cuboid is 2-5 cm long, 2-5 cm wide and 2-8 cm high; the side length of the cube is 2-5 cm.
In step S1, the ultrasonic cleaning is carried out at 80-100 Hz. When the frequency of the ultrasonic cleaner is lower than 80Hz, impurities on the surface of the pleurotus eryngii cannot be completely cleaned, and when the frequency is higher than 100Hz, the micro-pore structure of the pleurotus eryngii can be damaged. The ultrasonic cleaning time is preferably 30-60 min, the cleaning cannot be performed in less than 30min, the structure of the pleurotus eryngii can be damaged in more than 60min, the pleurotus eryngii is cut into cylinders, cuboids or cubes because the shape of the pleurotus eryngii is close to the shapes, and the calculation of the area and the evaporation efficiency is facilitated.
In step S3, the temperature of the photothermal conversion material modification reaction liquid is 20 to 35 ℃, and the stirring speed of the stirring reaction is 200 to 500 r/min. The reaction temperature is 20-35 ℃, because the reaction of the step S3 is carried out at room temperature, and the temperature of 20-35 ℃ is the proper room temperature under the condition of ensuring the reaction activity. The stirring time is 6-12 h, which is a time range ensuring complete reaction and no waste of reaction time. The stirring speed is 200-500 r/min, because the reaction is incomplete when the stirring speed is less than 200r/min, and the structure of the pleurotus eryngii can be damaged when the stirring speed is more than 500 r/min.
In steps S1 and S3, the vacuum degree of the vacuum environment is 1-10 Pa.
The pleurotus eryngii based photothermal conversion material is prepared by the preparation method.
Example 1
The pleurotus eryngii-based photothermal conversion material is prepared by the following steps:
s1, pretreating pleurotus eryngii
Soaking fresh pleurotus eryngii in deionized water, placing the soaked pleurotus eryngii in an ultrasonic cleaner, ultrasonically cleaning the fresh pleurotus eryngii for 60min at the frequency of 80Hz, wiping off water on the surface of the pleurotus eryngii by using absorbent paper, cutting the pleurotus eryngii into cylinders, cuboids or cubes, freezing the cut pleurotus eryngii in an environment at the temperature of-20 ℃ for 6h, placing the frozen pleurotus eryngii in the environment at the temperature of-80 ℃ for 96h under the vacuum degree of 10Pa, and taking out the frozen pleurotus eryngii to obtain the pretreated pleurotus eryngii.
The mass ratio of the deionized water used for soaking the pleurotus eryngii to the pleurotus eryngii is 5:1, the diameter of the cylinder is 5cm, the height of the cylinder is 8cm, and the height direction of the cylinder is the growth direction of the pleurotus eryngii.
S2, preparing dopamine hydrochloride reaction solution
Weighing dopamine hydrochloride solid, adding the dopamine hydrochloride solid into deionized water, and stirring at a stirring speed of 400r/min until the dopamine hydrochloride solid is completely dissolved to obtain 1g/L dopamine hydrochloride aqueous solution; dropwise adding a 0.2mol/L sodium hydroxide aqueous solution into the dopamine hydrochloride aqueous solution at a speed of 10 drops/min, stirring at a stirring speed of 20r/min, measuring the pH value of the dopamine hydrochloride aqueous solution by using a pH meter, stopping dropwise adding the sodium hydroxide aqueous solution when the pH value of the dopamine hydrochloride aqueous solution reaches 8.0 to obtain a dopamine hydrochloride reaction solution, and transferring the dopamine hydrochloride reaction solution to a low-temperature (2 ℃) environment for refrigeration for later use.
S3, preparation of pleurotus eryngii-based photothermal conversion material
Placing the pretreated pleurotus eryngii prepared in the step S1 into the dopamine hydrochloride reaction solution prepared in the step S2, and stirring the pleurotus eryngii on a magnetic stirrer at the stirring speed of 500r/min for 6 hours at the temperature of 20 ℃; taking out the reacted pleurotus eryngii, and wiping liquid on the surface of the reacted pleurotus eryngii by using absorbent paper; and (3) freezing the reacted pleurotus eryngii in an environment with the temperature of-20 ℃ for 6h, then transferring the pleurotus eryngii into an environment with the vacuum degree of 10Pa and the temperature of-80 ℃ for standing for 96h, and taking out the pleurotus eryngii to obtain the pleurotus eryngii-based photothermal conversion material.
Referring to fig. 1 and 2, it can be seen that the pleurotus eryngii-based photothermal conversion material has a three-dimensional multi-channel porous structure and the pore size is intensively distributed at 10-30 μm. The structure endows the pleurotus eryngii-based photothermal conversion material with photothermal conversion, heat preservation and moisture transmission functions, so that moisture can be automatically transported from bottom to top through a wicking effect, and heat can be preserved to reduce heat loss.
Putting the pleurotus eryngii based photothermal conversion material prepared in the step S3 into a beaker, adding a proper amount of water to enable the pleurotus eryngii based photothermal conversion material to float on the water surface (the height direction of the material is vertical to the horizontal plane), and putting the material with the power of 1kW/m2Under the illumination condition of (1), measuring the mass of water loss in the beaker, and calculating the ratio of the mass of water loss to the illumination area and time to obtain the water evaporation rate with the unit of kg.m-2·h-1The calculation results are shown in fig. 3. As can be seen, the water evaporation speed of the pleurotus eryngii based photothermal conversion material is 1.60 +/-0.5 kg.m-2h-1Is 2 times of the pleurotus eryngii.
Examples 2 to 5 and comparative examples 1 to 3
The Pleurotus eryngii-based photothermal conversion materials provided in examples 2-5 and comparative examples 1-3 were different from example 1 in that the freezing temperature and the vacuum freezing temperature in step S1 are shown in Table 1, and the rest are substantially the same as example 1, and thus detailed description thereof is omitted.
TABLE 1 preparation conditions of examples 2 to 5 and comparative examples 1 to 3
| Test examples | Freezing temperature (. degree.C.) | Vacuum freezing temperature (. degree.C.) |
| Example 2 | -10 | -80 |
| Example 3 | -5 | -80 |
| Example 4 | -20 | -60 |
| Example 5 | -20 | -20 |
| Comparative example 1 | Without freezing | -80 |
| Comparative example 2 | -20 | Without vacuum freezing |
| Comparative example 3 | Without freezing | Without vacuum freezing |
In step S1, the freezing process of the sample before vacuum freeze-drying is a precondition for vacuum freeze-drying, and if the freezing process is not performed, vacuum freeze-drying cannot be performed. When the vacuum freezing process is not performed after freezing, the structure of the prepared pleurotus eryngii-based photothermal conversion material may be damaged and the reaction of step S3 may not be complete. This is because the moisture in the sample is directly melted and the structure of the sample is collapsed. When neither the freezing process nor the vacuum freezing is performed, moisture in the sample is not removed, resulting in incomplete reaction in the subsequent step S3.
Examples 6 to 9 and comparative examples 4 to 6
The Pleurotus eryngii-based photothermal conversion materials provided in examples 6-9 and comparative examples 4-6 were different from those in example 1 in that the freezing temperature and the vacuum freezing temperature in step S3 are shown in Table 2, and the others are substantially the same as those in example 1, and thus, the details thereof are not repeated.
TABLE 2 preparation conditions of examples 6 to 9 and comparative examples 4 to 6
| Test examples | Freezing temperature (. degree.C.) | Vacuum freezing temperature (. degree.C.) |
| Example 6 | -10 | -80 |
| Example 7 | -5 | -80 |
| Example 8 | -20 | -60 |
| Example 9 | -20 | -20 |
| Comparative example 4 | Without freezing | -80 |
| Comparative example 5 | -20 | Without vacuum freezing |
| Comparative example 6 | Without freezing | Without vacuum freezing |
In step S3, the vacuum freezing process cannot be performed when the pleurotus eryngii is not frozen. When the vacuum freezing treatment is not carried out after freezing, the structure of the prepared pleurotus eryngii-based photothermal conversion material can be damaged, the mechanical property can be worsened, and a sample can collapse. When neither freezing treatment nor vacuum freezing is performed, moisture in the sample is not removed, which is not favorable for sample preservation and causes insufficient binding of dopamine hydrochloride in the sample to pleurotus eryngii base.
Examples 10 to 11 and comparative examples 7 to 8
The Pleurotus eryngii-based photothermal conversion materials provided in examples 10-11 and comparative examples 7-8 were different from those in example 1 in that the pH of the dopamine hydrochloride aqueous solution in step S2 is shown in Table 3, and the rest is substantially the same as that in example 1, and thus the description thereof is omitted.
TABLE 3 preparation conditions for examples 10 to 11 and comparative examples 7 to 8
| Test examples | pH value of dopamine hydrochloride aqueous solution |
| Example 10 | 8.25 |
| Example 11 | 8.5 |
| Comparative example 7 | 9 |
| Comparative example 8 | 7.5 |
When the pH value of the dopamine hydrochloride reaction solution is lower than 8.0, the reaction activity is low, the reaction speed is slow, and when the pH value is higher than 8.5, the structure of pleurotus eryngii can be damaged. Therefore, samples of pleurotus eryngii-based photothermal conversion materials obtained with excessively high or excessively low PH values have deteriorated photothermal conversion performance.
In conclusion, the pleurotus eryngii-based photothermal conversion material provided by the invention adopts cheap and easily available biomass material pleurotus eryngii as a matrix, cuts the pleurotus eryngii according to the growth direction, freezes and dries the pleurotus eryngii-based photothermal conversion material, and then adsorbs the high light absorption material. The invention skillfully adheres dopamine on the surface and the hole wall of the pleurotus eryngii by utilizing the super-strong adhesiveness of the dopamine hydrochloride and the porosity of the pleurotus eryngii to obtain the photothermal conversion material integrating the photothermal conversion part, the heat preservation part and the water transmission part. The water can be automatically transported from bottom to top through the wicking effect, the heat loss can be reduced through heat preservation, and the method has the characteristics of low cost, simplicity in operation, natural degradation, environmental friendliness and the like.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.
Claims (10)
1. A preparation method of a pleurotus eryngii based photothermal conversion material is characterized by comprising the following steps:
s1, ultrasonically cleaning pleurotus eryngii cut into a preset columnar body by using deionized water, taking out and removing surface moisture, freezing for 6-24 hours at the temperature of-20 to-5 ℃, and then freezing for 48-96 hours at the temperature of-80 to-20 ℃ in a vacuum environment to obtain pretreated pleurotus eryngii;
s2, preparing a photo-thermal conversion material modified reaction solution;
s3, placing the pretreated pleurotus eryngii obtained in the step S1 into the photo-thermal conversion material modification reaction liquid obtained in the step S2, stirring and reacting for 6-12 hours, taking out and removing surface water, freezing for 6-24 hours at the temperature of minus 20-minus 5 ℃, and then freezing for 48-96 hours at the temperature of minus 80-minus 20 ℃ in a vacuum environment to obtain the pleurotus eryngii-based photo-thermal conversion material.
2. The method for preparing Pleurotus eryngii based photothermal conversion material according to claim 1, wherein in step S2, the photothermal conversion material modified material reaction solution is dopamine hydrochloride aqueous solution.
3. The preparation method of the pleurotus eryngii-based photothermal conversion material according to claim 2, wherein the preparation method of the dopamine hydrochloride reaction solution comprises the following steps: preparing a dopamine hydrochloride aqueous solution with the concentration of 1-4 g/L, and then adjusting the pH value of the dopamine hydrochloride aqueous solution to 8.0-8.5 by using an alkali solution to obtain the dopamine hydrochloride reaction solution.
4. The preparation method of the pleurotus eryngii-based photothermal conversion material according to claim 3, wherein the alkali solution is a sodium hydroxide solution with a concentration of 0.1-1 mol/L.
5. The method for preparing Pleurotus eryngii based photothermal conversion material according to claim 1 or 2, wherein in step S1, the predetermined cylinder includes but is not limited to a cylinder, a rectangular parallelepiped or a cube, and the height direction of the predetermined cylinder is the same as the growth direction of Pleurotus eryngii.
6. The preparation method of the pleurotus eryngii-based photothermal conversion material according to claim 1 or 5, wherein the diameter of the cylinder is 2-5 cm, and the height of the cylinder is 2-8 cm; the cuboid is 2-5 cm long, 2-5 cm wide and 2-8 cm high; the side length of the cube is 2-5 cm.
7. The method for preparing Pleurotus eryngii based photothermal conversion material according to claim 1, wherein in step S1, the ultrasonic cleaning is performed at 80-100 Hz.
8. The method for preparing the Pleurotus eryngii based photothermal conversion material according to claim 1, wherein in step S3, the temperature of the photothermal conversion material modification reaction solution is 20-35 ℃, the stirring speed of the stirring reaction is 200-500 r/min, and the stirring method is magnetic stirring.
9. The method for preparing Pleurotus eryngii based photothermal conversion material according to claim 1, wherein in steps S1 and S3, the vacuum degree of the vacuum environment is 1-100 Pa.
10. An pleurotus eryngii-based photothermal conversion material prepared by the preparation method of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110085292.3A CN112898954B (en) | 2021-01-22 | 2021-01-22 | Pleurotus eryngii based photothermal conversion material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110085292.3A CN112898954B (en) | 2021-01-22 | 2021-01-22 | Pleurotus eryngii based photothermal conversion material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112898954A true CN112898954A (en) | 2021-06-04 |
| CN112898954B CN112898954B (en) | 2021-11-16 |
Family
ID=76117587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110085292.3A Expired - Fee Related CN112898954B (en) | 2021-01-22 | 2021-01-22 | Pleurotus eryngii based photothermal conversion material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112898954B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113735097A (en) * | 2021-09-22 | 2021-12-03 | 北京林业大学 | Preparation method and application of environment-friendly efficient interface three-dimensional carbon-based photothermal conversion material with anti-crystallization groove |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104313889A (en) * | 2014-10-22 | 2015-01-28 | 武汉纺织大学 | Preparation method of photosensitive antibacterial fabric |
| CN106885384A (en) * | 2017-02-09 | 2017-06-23 | 清华大学 | The application of photothermal deformation element and poly-dopamine |
| CN106958141A (en) * | 2017-04-24 | 2017-07-18 | 东华大学 | A kind of method for preparing photothermal deformation fabric |
| CN107652676A (en) * | 2017-09-06 | 2018-02-02 | 华南理工大学 | A kind of method for improving conducting polymer hydrogel adhesive capacity on matrix material |
| US20180043278A1 (en) * | 2016-08-02 | 2018-02-15 | Washington University | Bilayered structures for solar steam generation |
| CN109575886A (en) * | 2018-12-24 | 2019-04-05 | 电子科技大学 | A method of optical-thermal conversion material is prepared based on lotus leaf |
| CN109705316A (en) * | 2019-01-18 | 2019-05-03 | 四川大学 | The preparation method of artificial black cellulosic material with high photothermal conversion efficiency |
| CN110284323A (en) * | 2019-07-30 | 2019-09-27 | 清华大学 | Flexible optical-thermal conversion material and preparation method thereof, the purposes in sea water desalination |
| CN110816009A (en) * | 2019-10-25 | 2020-02-21 | 武汉理工大学 | Photothermal conversion material and preparation method and application thereof |
| CN110873473A (en) * | 2019-11-25 | 2020-03-10 | 云南大学 | Photo-thermal conversion material, preparation method thereof and solar photo-thermal conversion device |
| CN111205455A (en) * | 2019-12-30 | 2020-05-29 | 清华大学 | Preparation method and application of three-dimensional polydopamine |
| CN111298141A (en) * | 2019-12-18 | 2020-06-19 | 湖南大学 | Iron and dopamine coordination-based nanoparticle photothermal conversion material and preparation method and application thereof |
| CN111924918A (en) * | 2020-06-29 | 2020-11-13 | 东华大学 | Double-sided photo-thermal conversion material and solar seawater evaporation device constructed by same |
| CN111978592A (en) * | 2020-08-15 | 2020-11-24 | 盐城工学院 | Preparation method of photo-thermal material and application of photo-thermal material in water evaporation |
-
2021
- 2021-01-22 CN CN202110085292.3A patent/CN112898954B/en not_active Expired - Fee Related
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104313889A (en) * | 2014-10-22 | 2015-01-28 | 武汉纺织大学 | Preparation method of photosensitive antibacterial fabric |
| US20180043278A1 (en) * | 2016-08-02 | 2018-02-15 | Washington University | Bilayered structures for solar steam generation |
| CN106885384A (en) * | 2017-02-09 | 2017-06-23 | 清华大学 | The application of photothermal deformation element and poly-dopamine |
| CN106958141A (en) * | 2017-04-24 | 2017-07-18 | 东华大学 | A kind of method for preparing photothermal deformation fabric |
| CN107652676A (en) * | 2017-09-06 | 2018-02-02 | 华南理工大学 | A kind of method for improving conducting polymer hydrogel adhesive capacity on matrix material |
| CN109575886A (en) * | 2018-12-24 | 2019-04-05 | 电子科技大学 | A method of optical-thermal conversion material is prepared based on lotus leaf |
| CN109705316A (en) * | 2019-01-18 | 2019-05-03 | 四川大学 | The preparation method of artificial black cellulosic material with high photothermal conversion efficiency |
| CN110284323A (en) * | 2019-07-30 | 2019-09-27 | 清华大学 | Flexible optical-thermal conversion material and preparation method thereof, the purposes in sea water desalination |
| CN110816009A (en) * | 2019-10-25 | 2020-02-21 | 武汉理工大学 | Photothermal conversion material and preparation method and application thereof |
| CN110873473A (en) * | 2019-11-25 | 2020-03-10 | 云南大学 | Photo-thermal conversion material, preparation method thereof and solar photo-thermal conversion device |
| CN111298141A (en) * | 2019-12-18 | 2020-06-19 | 湖南大学 | Iron and dopamine coordination-based nanoparticle photothermal conversion material and preparation method and application thereof |
| CN111205455A (en) * | 2019-12-30 | 2020-05-29 | 清华大学 | Preparation method and application of three-dimensional polydopamine |
| CN111924918A (en) * | 2020-06-29 | 2020-11-13 | 东华大学 | Double-sided photo-thermal conversion material and solar seawater evaporation device constructed by same |
| CN111978592A (en) * | 2020-08-15 | 2020-11-24 | 盐城工学院 | Preparation method of photo-thermal material and application of photo-thermal material in water evaporation |
Non-Patent Citations (1)
| Title |
|---|
| 周靖 等: ""食用菌真空冷冻干燥工艺的初步研究"", 《上海农业科技》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113735097A (en) * | 2021-09-22 | 2021-12-03 | 北京林业大学 | Preparation method and application of environment-friendly efficient interface three-dimensional carbon-based photothermal conversion material with anti-crystallization groove |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112898954B (en) | 2021-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113005765B (en) | Hydrophilic-hydrophobic 'Shuangshen' structure composite photothermal conversion material, preparation method and application thereof | |
| Wang et al. | Anti-biofouling double-layered unidirectional scaffold for long-term solar-driven water evaporation | |
| CN110164715B (en) | Preparation method of wood-based flexible composite electrode material | |
| CN112898954B (en) | Pleurotus eryngii based photothermal conversion material and preparation method thereof | |
| CN110746657A (en) | Preparation method and application of composite biomass aerogel photothermal conversion material | |
| CN109292760B (en) | Method for preparing graphene | |
| CN110498464B (en) | Photothermal conversion material with carbon nanotube aerogel wood chip double-layer structure | |
| CN113815072B (en) | Wood-based composite material for photo-thermal sewage purification and preparation method and application thereof | |
| CN113942995B (en) | Heteroatom doped porous carbon material and preparation method and application thereof | |
| CN112724427B (en) | Preparation of corn starch/sodium alginate/MXene composite hydrogel and application of composite hydrogel in seawater desalination | |
| AU2020101074A4 (en) | Licorice root residue-based hierarchical porous carbon, preparation method and application thereof | |
| CN107459042A (en) | A kind of method that template-free method prepares three-dimensional multistage duct activated carbon | |
| CN110697706A (en) | Preparation method of three-dimensional biomass carbon/copper sulfide used as electrode material | |
| CN115490285B (en) | Chocolate bar-shaped composite solar evaporator and preparation method and application thereof | |
| CN109092248A (en) | A kind of biology carbon material and the preparation method and application thereof | |
| CN102658084A (en) | Preparation method of nickel nitrate modified sludge activated carbon | |
| CN114605855B (en) | Preparation method of super-hydrophobic coating with anti-icing/deicing function | |
| CN114920947A (en) | MOF material for seawater desalination, preparation method thereof and seawater desalination device based on MOF material | |
| CN110813234A (en) | Preparation method of antibacterial modified wheat straw biochar with amphiphilic characteristic | |
| CN114350030A (en) | Biomass-based aerogel photothermal material and preparation method and application thereof | |
| Li et al. | Aerogel-based solar interface evaporation: Current research progress and future challenges | |
| CN112624111A (en) | Preparation method of metal-catalyzed corn straw derived carbon electrode material | |
| CN115725112B (en) | Janus double-layer aerogel and preparation method and application thereof | |
| CN110074102B (en) | Nano-silver biomass charcoal composite sterilization material and preparation method and application thereof | |
| CN113735097A (en) | Preparation method and application of environment-friendly efficient interface three-dimensional carbon-based photothermal conversion material with anti-crystallization groove |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211116 |