AU2021102294A4 - Method for preparing flexible Ag2S/MC composite thermoelectric film - Google Patents
Method for preparing flexible Ag2S/MC composite thermoelectric film Download PDFInfo
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- AU2021102294A4 AU2021102294A4 AU2021102294A AU2021102294A AU2021102294A4 AU 2021102294 A4 AU2021102294 A4 AU 2021102294A4 AU 2021102294 A AU2021102294 A AU 2021102294A AU 2021102294 A AU2021102294 A AU 2021102294A AU 2021102294 A4 AU2021102294 A4 AU 2021102294A4
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- Australia
- Prior art keywords
- ag2s
- composite
- flexible
- thermoelectric film
- composite thermoelectric
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- 229910052946 acanthite Inorganic materials 0.000 title claims abstract description 78
- FSJWWSXPIWGYKC-UHFFFAOYSA-M silver;silver;sulfanide Chemical compound [SH-].[Ag].[Ag+] FSJWWSXPIWGYKC-UHFFFAOYSA-M 0.000 title claims abstract description 78
- 239000002131 composite material Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000001035 drying Methods 0.000 claims abstract description 38
- 238000007650 screen-printing Methods 0.000 claims abstract description 32
- 238000005119 centrifugation Methods 0.000 claims abstract description 27
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 23
- 238000000137 annealing Methods 0.000 claims abstract description 22
- 238000003756 stirring Methods 0.000 claims abstract description 21
- 239000008367 deionised water Substances 0.000 claims abstract description 17
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000005516 engineering process Methods 0.000 claims abstract description 14
- 239000002244 precipitate Substances 0.000 claims abstract description 14
- 238000002360 preparation method Methods 0.000 claims abstract description 14
- 238000005406 washing Methods 0.000 claims abstract description 14
- 229910052979 sodium sulfide Inorganic materials 0.000 claims abstract description 9
- 239000000758 substrate Substances 0.000 claims abstract description 7
- 239000002904 solvent Substances 0.000 claims abstract description 5
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims abstract 3
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000006228 supernatant Substances 0.000 claims description 6
- 239000004642 Polyimide Substances 0.000 claims description 4
- 229920001721 polyimide Polymers 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 238000007639 printing Methods 0.000 abstract description 3
- 238000010248 power generation Methods 0.000 abstract description 2
- 229920000609 methyl cellulose Polymers 0.000 abstract 11
- 239000001923 methylcellulose Substances 0.000 abstract 11
- 238000005057 refrigeration Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 11
- VDQVEACBQKUUSU-UHFFFAOYSA-M disodium;sulfanide Chemical compound [Na+].[Na+].[SH-] VDQVEACBQKUUSU-UHFFFAOYSA-M 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 229920005570 flexible polymer Polymers 0.000 description 2
- 229910002899 Bi2Te3 Inorganic materials 0.000 description 1
- 101000690425 Homo sapiens Type-1 angiotensin II receptor Proteins 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 102100026803 Type-1 angiotensin II receptor Human genes 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 150000004770 chalcogenides Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000011160 polymer matrix composite Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/01—Manufacture or treatment
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/80—Constructional details
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/80—Constructional details
- H10N10/85—Thermoelectric active materials
- H10N10/851—Thermoelectric active materials comprising inorganic compositions
- H10N10/852—Thermoelectric active materials comprising inorganic compositions comprising tellurium, selenium or sulfur
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The present patent relates to a method for preparing a flexible Ag2S/methylcellulose
(MC) composite thermoelectric film. The present patent prepares the flexible Ag2S/MC
composite thermoelectric film with a screen printing technology for the first time. The
method includes four steps: preparation of Ag2S powder, preparation of screen printing paste,
preparation of Ag2S/MC composite thermoelectric film and annealing process, specific as
follows: (1) adding a proper amount of Na2S•9H20 to deionized water and performing
stirring to form a clear solution, then adding a certain amount of AgNO3 and performing
stirring to form a black precipitate in a solution, then performing centrifugation, washing,
with deionized water, the black precipitate obtained through centrifugation, repeating the
steps of centrifugation and washing for three times, pouring out a supernate, and performing
drying to obtain the Ag2S powder; (2) dissolving MC in a proper solvent, then adding a
proper amount of Ag2S powder, and performing stirring for 0.5-5 h to prepare the Ag2S/MC
composite paste; (3) printing the Ag2S/MC composite paste on a flexible substrate by the
screen printing technology, and performing drying to prepare the Ag2S/MC composite
thermoelectric film; and (4) performing annealing on the printed Ag2S/MC composite
thermoelectric film under a certain temperature condition for a certain time, so as to form the
flexible Ag2S/MC composite thermoelectric film with excellent performance. The method is
convenient to operate, and the prepared flexible Ag2S/MC composite film with excellent
performance has a wide application prospect in the fields of thermoelectric power generation
and refrigeration devices.
Fig.3
2/2
Fig. 3
Fig. 4
Description
2/2
Fig. 3
Fig. 4
METHOD FOR PREPARING FLEXIBLE AG2S/MC COMPOSITE THERMOELECTRIC FILM
[0001] The present patent belongs to the technical field of thermoelectric materials, and mainly relates to a method for preparing a flexible Ag2S/MC composite thermoelectric
film.
[0002] Along with high-speed development of global industrialization, the problem of
energy shortage becomes increasingly serious. At present, there is about 60% of energy in the
world is wasted in the form of waste heat. A thermoelectric material is a functional material
which achieves interconversion between heat and electricity through solid internal carriers.
[0003] As traditional thermoelectric materials, inorganic chalcogenides, such as
(Bi2Te3), have excellent thermoelectric performances, but mostly have the problems of
brittleness and stiffness, which limit their applications in thefield of flexible thermoelectricity.
During practical production and living, most waste heat sources are not flat in surfaces. In
such context, it is urgent to design and prepare a composite thermoelectric film with a good
flexibility in order to improve the recycling efficiency of the waste heat. However, there are
no proper technologies at present for preparing high-performance flexible composite
thermoelectric films on a large scale.
[0004] A screen printing technology is mainly to apply certain acting force to paste of
a screen through a scraper blade, and the scraper blade moves to the other end of the screen at
the same time, during which, the paste is extruded to a substrate material through screen
holes by the scraper blade so as to form a layer offilm material on the substrate material.
Therefore, a new technology is provided for development of flexible polymer matrix
composite thermoelectric materials.
[0005] The patent prepares a flexible Ag2S/MC composite thermoelectric film with a
screen printing technology for the first time, and greatly improves a thermoelectric
performance of the material through annealing treatment, thereby providing a new idea for research and development of the flexible composite thermoelectric materials
[00061 Aimed at the defects in the prior art, the present patent prepares a flexible Ag2S/MC composite thermoelectric film by combining screen printing with annealing treatment. The method has the advantages of being suitable for production on a large scale, convenient to operate, etc., and provides a new technology for preparing a high-performance flexible polymer matrix composite thermoelectric material.
[00071 The present patent provides a method for preparing a flexible Ag2S/MC composite thermoelectric film. The method includes the following steps:
[0008] a step of preparing Ag2S powder: adding a proper amount of Na2S•9H20 to deionized water and performing stirring to form a clear solution, then adding a certain amount of AgNO3 (wherein a mole ratio between Na2S•9H20 and AgNO3 is 1:2) and performing stirring to form a black precipitate in a solution, then performing centrifugation (with a centrifugation time of 5 minutes, and a rotation speed of 9,000 rpm), washing, with deionized water, the black precipitate obtained through centrifugation, repeating the steps of centrifugation and washing for three times, pouring out a supernatant, and then performing drying (with a drying temperature of 70°C and a drying time of 12 h) to obtain the Ag2S powder;
[0009] a step of preparing screen printing paste: dissolving MC in a proper solvent by proper method, then adding a proper amount of Ag2S powder, and performing stirring for 0.5-5 h to prepare the Ag2S/MC composite paste;
[0010] a step of performing screen printing: printing the Ag2S/MC composite paste on a proper flexible substrate by a screen printing technology, and performing drying (with a drying temperature of 70°C and a drying time of 12 h) to prepare the Ag2S/MC composite thermoelectric film; and
[0011] a step of performing annealing treatment: performing annealing on the printed Ag2S/MC composite thermoelectric film under a certain temperature condition for a certain time to form the flexible Ag2S/MC composite thermoelectric film with excellent performance.
[00121 Further, the proper method in the preparing screen printing paste is a heating method.
[0013] Further, the proper solvent in the preparing screen printing paste is selected from deionized water, ethanediol, terpilenol, etc.
[0014] Further, the proper amount of Ag2S powder in the preparing screen printing paste means that a mass ratio between Ag2S and MC ranges from 0.01:1 to 9.5:1.
[0015] Further, the proper flexible substrate in the performing screen printing is selected from a fabric, a filter membrane, polyimide, a polyester fibre, etc.
[0016] Further, performing annealing under a certain temperature condition for a certain time in the annealing means performing annealing at a temperature of 50-300°C and
for a time of 0.5-5 h.
[00171 The present patent has the advantages of being suitable for production on a
large scale, convenient to operate, etc., an excellent thermoelectric performance is achieved
after annealing, and the prepared composite thermoelectric film has tremendous application
prospects in the field of thermoelectric power generation devices.
[0018] Fig. 1 is a technological flowchart of a Ag2S/MC composite thermoelectric
film prepared by using the present patent;
[0019] Fig. 2 is an XRD pattern of Ag2S prepared by using Embodiment 1;
[0020] Fig. 3 is a digital photograph of a flexible Ag2S/MC composite thermoelectric
film (not subjected to annealing treatment) prepared by using Embodiment 1; and
[0021] Fig. 4 is a digital photograph of a flexible Ag2S/MC composite thermoelectric
film (subjected to annealing treatment) prepared by using Embodiment 1.
DESCRIPTION OF THE EMBODIMENTS Embodiment 1
[0022] (1) preparation of Ag2S powder: adding 0.01 mol of Na2S•9H20 to 400 mL of
deionized water, performing stirring to form a clear solution, then adding 0.02 mol of AgNO3
and performing stirring to form a black precipitate in a solution, then performing centrifugation (with a centrifugation time of 5 minutes, and a rotation speed of 9,000 rpm), washing, with deionized water, the black precipitate obtained through centrifugation, repeating the steps of centrifugation and washing for three times, pouring out a supernatant, and then performing drying (with a drying temperature of 70°C and a drying time of 12 h) to obtain the Ag2S powder.
[0023] (2) preparation of screen printing paste: adding 0.3 g of MC to 4 mL of terpilenol and performing heating to dissolve same, then adding 0.7 g of Ag2S powder, and
performing stirring for 2 h to prepare the Ag2S/MC composite paste.
[0024] (3) screen printing: printingthe Ag2S/MC composite paste on polyimide by a screen printing technology, and performing drying (with a drying temperature of 70°C and a
drying time of 12 h) to prepare the Ag2S/MC composite thermoelectric film.
[0025] (4) annealing: performed: performing annealing on the printed Ag2S/MC composite thermoelectric film at 300°C for 2 h to form the flexible Ag2S/MC composite
thermoelectric film with excellent performance.
Embodiment 2
[0026] (1) perparation of Ag2S powder: adding 0.01 mol of Na2S•9H20 to 400 mL of
deionized water and performing stirring to form a clear solution, then adding 0.02 mol of
AgNO3 and performing stirring to form a black precipitate in a solution, then performing
centrifugation (with a centrifugation time of 5 minutes, and a rotation speed of 9,000 rpm),
washing, with deionized water, the black precipitate obtained through centrifugation,
repeating the steps of centrifugation and washing for three times, pouring out a supernatant,
and performing drying (with a drying temperature of 70°C and a drying time of 12 h) to
obtain the Ag2S powder.
[00271 (2) perparation of screen printing paste: adding 0.9 g of MC to 8 mL of
deionized water and performing heating to dissolve same, then adding 0.009 g of Ag2S
powder, and performing stirring for 0.5 h to prepare the Ag2S/MC composite paste.
[0028] (3) screen printing: printing the Ag2S/MC composite paste on a nylon filter
membrane by a screen printing technology, and performing drying (with a drying temperature
of 70°C and a drying time of 12 h) to prepare the Ag2S/MC composite thermoelectric film.
[00291 (4) annealing: performing annealing on the printed Ag2S/MC composite thermoelectric film at 50°C for 0.5 h to form the flexible Ag2S/MC composite thermoelectric
film with excellent performance.
Embodiment 3
[0030] (1) preparation of Ag2S powder: adding 0.01 mol of Na2S•9H20 to 400 mL of deionized water and performing stirring to form a clear solution, then adding 0.02 mol of
AgNO3 and performing stirring to form a black precipitate in a solution, then performing
centrifugation (with a centrifugation time of 5 minutes, and a rotation speed of 9,000 rpm),
washing, with deionized water, the black precipitate obtained through centrifugation,
repeating the steps of centrifugation and washing for three times, pouring out a supernatant,
and performing drying (with a drying temperature of 70°C and a drying time of 12 h) to
obtain the Ag2S powder.
[0031] (2) preparation of screen printing paste: adding 0.05 g of MC to 2 mL of
terpilenol, performing heating to dissolve same, then adding 0.475 g of Ag2S powder, and
performing stirring for 5 h to prepare the Ag2S/MC composite paste.
[0032] (3) screen printing: utilising the screen printing technology to cover polyimide
with the Ag2S/MC composite paste, and performing drying (with a drying temperature of
°C and a drying time of 12 h) to prepare the Ag2S/MC composite thermoelectric film.
[0033] (4) annealing: performing annealing on the printed Ag2S/MC composite
thermoelectric film at 300°C for 5 h to form the flexible Ag2S/MC composite thermoelectric
film with excellent performance.
Embodiment 4
[0034] (1) preparation of Ag2S powder: adding 0.01 mol of Na2S•9H20 to 400 mL of
deionized water, performing stirring to form a clear solution, then adding 0.02 mol of AgNO3
and performing stirring to form a black precipitate in a solution, then performing
centrifugation (with a centrifugation time of 5 minutes, and a rotation speed of 9,000 rpm),
washing, with deionized water, the black precipitate obtained through centrifugation, pouring
out a supernatant after repeating the steps of centrifugation and washing for three times, and
then performing drying (with a drying temperature of 70°C and a drying time of 12 h) to
1; obtain the Ag2S powder.
[0035] (2) preparation of screen printing paste: adding 0.5 g of MC to 5 mL of terpilenol, performing heating to dissolve same, then adding 0.5 g of Ag2S powder, and performing stirring for 3 h to prepare the Ag2S/MC composite paste.
[0036] (3) screen printing: utilising the screen printing technology to cover a polyester fibre with the Ag2S/MC composite paste, and performing drying (with a drying temperature of 70°C and a drying time of 12 h) to prepare the Ag2S/MC composite thermoelectric film.
[00371 (4) annealing: performing annealing on the printed Ag2S/MC composite thermoelectric film at 150°C for 3 h to form the flexible Ag2S/MC composite thermoelectric film with excellent performance.
Claims (5)
1. A method for preparing a flexible Ag2S/MC composite thermoelectric film,
characterized in that the method comprises steps:
(1) preparation of Ag2S powder: adding a proper amount of Na2S•9H20 to deionized
water and performing stirring to form a clear solution, then adding a certain amount of
AgNO3 (wherein the mole ratio between Na2S•9H20 and AgNO3 is 1:2) and performing
stirring to form a black precipitate in a solution, then performing centrifugation (with a
centrifugation time of 5 minutes, and a rotation speed of 9,000 rpm), washing, with deionized
water, the black precipitate obtained through centrifugation, repeating the steps of
centrifugation and washing for three times, pouring out a supernatant, and performing drying
(with a drying temperature of 70°C and a drying time of 12 h) to obtain the Ag2S powder;
(2) preparation of screen printing paste: dissolving MC in a proper solvent by a proper
method, then adding a proper amount of Ag2S powder, and performing stirring for 0.5-5 h to
prepare the Ag2S/MC composite paste;
(3) screen printing: printingthe Ag2S/MC composite paste on a proper flexible substrate
by a screen printing technology, and performing drying (with a drying temperature of 70°C
and a drying time of 12 h) to prepare the Ag2S/MC composite thermoelectric film; and
(4) annealing: performing annealing on the printed Ag2S/MC composite thermoelectric
film under a certain temperature condition for a certain time to form the flexible Ag2S/MC
composite thermoelectric film with excellent performance.
2. The method for preparing the flexible Ag2S/MC composite thermoelectric film
according to claim 1, characterized in that the proper method in the preparation of screen
printing paste is a heating method.
3. The method for preparing the flexible Ag2S/MC composite thermoelectric film
according to claim 1, characterized in that the proper solvent in the preparation of screen
printing paste is selected from deionized water, ethanediol, terpilenol, etc.
4. The method for preparing the flexible Ag2S/MC composite thermoelectric film
according to claim 1, characterized in that the proper amount of Ag2S powder in the
preparation of screen printing paste means that the mass ratio between Ag2S and MC ranges
from 0.01:1 to 9.5:1.
5. The method for preparing the flexible Ag2S/MC composite thermoelectric film
according to claim 1, characterized in that the proper flexible substrate in the performing
screen printing is selected from a fabric, a filter membrane, polyimide, a polyester fibre, etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021102294A AU2021102294A4 (en) | 2021-04-30 | 2021-04-30 | Method for preparing flexible Ag2S/MC composite thermoelectric film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021102294A AU2021102294A4 (en) | 2021-04-30 | 2021-04-30 | Method for preparing flexible Ag2S/MC composite thermoelectric film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2021102294A4 true AU2021102294A4 (en) | 2021-06-17 |
Family
ID=76327652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2021102294A Ceased AU2021102294A4 (en) | 2021-04-30 | 2021-04-30 | Method for preparing flexible Ag2S/MC composite thermoelectric film |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2021102294A4 (en) |
-
2021
- 2021-04-30 AU AU2021102294A patent/AU2021102294A4/en not_active Ceased
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|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) | ||
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |