CN105255078A - Polytetrafluoroethylene film for solar panels, and making method thereof - Google Patents
Polytetrafluoroethylene film for solar panels, and making method thereof Download PDFInfo
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- CN105255078A CN105255078A CN201510610701.1A CN201510610701A CN105255078A CN 105255078 A CN105255078 A CN 105255078A CN 201510610701 A CN201510610701 A CN 201510610701A CN 105255078 A CN105255078 A CN 105255078A
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- solar panels
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- polytetrafluorethylepowder powder
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The invention provides a polytetrafluoroethylene film for solar panels, and a making method thereof. The method comprises the following steps: uniformly mixing polytetrafluoroethylene powder with a specifically composed composite solvent, carrying out constant temperature slaking, carrying out compression molding, carrying out high temperature heat treatment, rapidly cooling, slicing, and carrying out plasma modification treatment to make the polytetrafluoroethylene film with very high light transmittance. The polytetrafluoroethylene film made in the invention has the advantages of excellent high temperature resistance, excellent wear resistance, excellent weatherability and good mechanical performances, so the polytetrafluoroethylene film for solar panels is suitable for various extreme environments where the solar panels are possibly positioned in, and completely meets demands of severe working environment of the solar panels.
Description
Technical field
The present invention relates to a kind of solar panels poly tetrafluoroethylene, and relate to the preparation method of this solar panels poly tetrafluoroethylene, belong to technical field of polymer materials.
Technical background
Under the overall background of global warming, the deterioration of the ecological environment, find the substitute of fossil energy, improve energy structure and become the focus paid close attention to various countries.In many clean energy alternativess, sun power is considered to one of the most potential energy in future with the feature such as clean, safety, resource are sufficient, is subject to very big attention and the support of countries in the world.For the development and utilization of sun power, most is representational is solar cell, in solar cell family, flexible thin-film solar cell has the advantages such as light, soft, thin, and having better thermal adaptability, low-light conditions and low light level performance, its development prospect receives the extensive concern of all circles.At present, the thin-film solar cells of main flow has CIGS, GaAs, CdTe etc., and in these hull cells above-mentioned, CIGS is that Performance and Cost Modeling combines best flexible thin-film solar cell, and its typical assembly efficiency of conversion is more than 15%.For CIGS hull cell, encapsulation cephacoria is the important auxiliary part that its performance is given full play to, and the selection of material becomes the key factor determining encapsulation cephacoria quality naturally.In present solar module, use maximum packaged materials to be ethylene-vinyl acetate copolymer (EVA), thermotolerance and creep resistant is improved by adding linking agent wherein, interpolation oxidation inhibitor and stablizer improve ageing resistance, add tackifier and improve clinging power, substantially can meet the service requirements of solar module.But because EVA resin is not high to the barrier property of moisture, in long-term outdoor use procedure, the moisture infiltrated in assembly often makes tackifier lose efficacy, cause packaged material can not be lasting to the clinging power of front-back baseboard.Use EVA as the above-mentioned defect existing for hull cell encapsulation cephacoria to overcome, a kind of photovoltaic module of prior art, comprising: substrate, and described substrate is made up of galss fiber reinforced resin; Photovoltaic layer; described photovoltaic layer is located on the upper surface of described substrate, and wherein said photovoltaic layer comprises at least one photovoltaic cell and transparent protective layer, and described protective layer covers on described photovoltaic layer; described protective layer by fluoroplastics, as tetrafluoroethylene (PTFE) is made.Above-mentioned technology due to employ there is excellent intensity, weather resistance, weathering resistance and water resistance tetrafluoroethylene as protective layer, therefore can realize the available protecting to photovoltaic layer, extend work-ing life of photovoltaic module.But, using poly tetrafluoroethylene as encapsulation cephacoria still Problems existing be, because the transmittance of tetrafluoroethylene self is lower, usually to only have about 40%, thus cause the efficiency of light absorption of the photovoltaic cell in above-mentioned technology less, be difficult to meet power demands.Therefore, how improving the transmittance of tetrafluoroethylene encapsulation cephacoria, to strengthen the assimilated efficiency of photovoltaic cell to light, is those skilled in the art's technical barriers urgently to be resolved hurrily.
Summary of the invention
What the present invention solved is that prior art uses tetrafluoroethylene as the low problem of the battery light absorption ratio existing for solar cell package cephacoria, and then provides a kind of solar panels poly tetrafluoroethylene with high transmission rate and weathering resistance and preparation method thereof.
The technical scheme that the present invention solves the problems of the technologies described above employing is:
A kind of solar panels poly tetrafluoroethylene, be made up of the raw material of following weight part:
Kerosene 40-50;
Initiator 0.5-1;
Dispersion agent 1-2;
Tensio-active agent 1-3;
Solubility promoter 1-3;
Polytetrafluorethylepowder powder 800-1000;
Epoxy resin 10-20;
Further, described a kind of solar panels poly tetrafluoroethylene, be made up of the raw material of following weight part:
Kerosene 45;
Initiator 0.7;
Dispersion agent 1.5;
Tensio-active agent 2;
Solubility promoter 2;
Polytetrafluorethylepowder powder 900;
Epoxy resin 15;
Further, described initiator is Potassium Persulphate; Described dispersion agent is perfluorocarboxylic acid ammonium salt; Described solubility promoter is one or more in toluene, hexylene glycol or ethyl acetate; Described tensio-active agent is one or more in polyene-based succimide, Sodium perfluorooctanoate or perfluoro octyl sulfonic acid sodium, and described epoxy resin is bisphenol A type epoxy resin.
Further, the purity of described polytetrafluorethylepowder powder is 99.9%, degree of crystallinity≤80%, particle diameter be 0.1-0.2 μm, molecular weight is 8,000,000-1,200 ten thousand.
A preparation method for solar panels poly tetrafluoroethylene, is characterized in that, comprises the steps:
(1) kerosene, dispersion agent, epoxy resin, tensio-active agent and solubility promoter are uniformly mixed, form double solvents;
(2) double solvents of step (1) and initiator are added in polytetrafluorethylepowder powder, after stirring under the constant temperature of 10-18 DEG C, with the speed of 20-80r/min, again in inert atmosphere, cooked at constant 8-12h at 24-40 DEG C, obtain slaking material;
(3) compression molding is carried out to the slaking material of step (2);
(4), after the finished product of step (3) being left standstill 24h, heat-treat, and keep 24-36h; Described heat treated heating schedule is: from the temperature rise rates of 25 DEG C to 320 DEG C be 20 DEG C/temperature rise rate of min, 320-330 DEG C is 5 DEG C/temperature rise rate of min, 330-370 DEG C is 10 DEG C/min;
(5) cooling liquid is used to cool the sample after step (4) process fast with the rate of temperature fall of 40-60 DEG C/min, and in the post-drying of 1-2h;
(6) sample after oven dry in step (5) is cut into slices;
(7) section of hydrogen plasma to step (6) is adopted to carry out modification;
(8) adopt the section of ozone plasma to step (7) to carry out modification, namely obtain described solar panels poly tetrafluoroethylene;
Further, in step (3), the pressure of pre-molding is 40-65MPa, and squeeze time is 1-10min, and pressurize 5-20min.
Further, the cooling liquid in step (5) is the water of-10 ~ 0 DEG C and the mixed solution of alcohol, and in described mixed solution, the mass ratio of water and alcohol is 1:(0.5-1).
The preparation method of solar panels poly tetrafluoroethylene of the present invention, kerosene, epoxy resin, tensio-active agent and solubility promoter are mixed the double solvents formed and are added in polytetrafluorethylepowder powder by step (2), slowly stir under 10-18 DEG C of constant temperature, be conducive to like this optimizing putting in order of tetrafluoroethylene molecule, thus transmittance and the film-formation result of poly tetrafluoroethylene can be improved.The finished product of step of the present invention (4) to step (3) is heat-treated, to utilize the high temperature of 330-370 DEG C, finished product is shaped, more contributing to the shaping performance improving molecular structure by adopting specific temperature-programmed mode, improving the structure of molecule.Preparation method of the present invention is in step (7), (8), using plasma carries out modification to section, its role is to the surfactivity improving section, be conducive to the adding of epoxy resin the curing performance strengthening compound, be convenient to the curing molding of polytetrafluorethylepowder powder, to strengthen its cohesive strength, realize the strong bonding between poly tetrafluoroethylene and photovoltaic cell.With use poly tetrafluoroethylene as compared with solar cell package cephacoria in prior art, the transmittance of the solar panels poly tetrafluoroethylene obtained according to preparation method of the present invention is greatly improved, and the transmittance under 300-1200nm can reach more than 90.5%.And, solar panels poly tetrafluoroethylene of the present invention also has excellent high temperature resistant, wear-resistant, weathering resistance, and its good mechanical property, thus make poly tetrafluoroethylene of the present invention can be applicable to solar panels may faced by various extreme conditions, meet the Working environment demand of solar panels completely.
Embodiment
Below in conjunction with specific embodiment, the preparation method to solar panels poly tetrafluoroethylene provided by the invention is described in detail.In the following embodiments, wt% represents mass percentage.
Embodiment 1
(1) mass ratio is followed successively by the kerosene of 40:1:1:1, perfluorocarboxylic acid ammonium salt, Sodium perfluorooctanoate, hexylene glycol mix, form double solvents; In described kerosene, the content of isoparaffin is 80wt%, and the content of normal paraffin is 16wt%;
(2) double solvents of step (1) and Potassium Persulphate are added in polytetrafluorethylepowder powder, stir after 0.5h under the constant temperature of 14 DEG C, with the speed of 20r/min, then in nitrogen atmosphere, under 24 DEG C of constant temperature slaking 10h, obtain slaking material;
Wherein, the purity of described polytetrafluorethylepowder powder is 99.9%, degree of crystallinity≤80%, particle diameter are 0.1-0.2 μm, molecular weight is 8,000,000, the mass ratio of the kerosene in polytetrafluorethylepowder powder and double solvents is 20: 1, and the mass ratio of polytetrafluorethylepowder powder and Potassium Persulphate is 1600: 1;
(3) carry out compression molding process to the slaking material of step (2), the pressure of pre-molding is 40MPa, and squeeze time is 5.5min, and pressurize 5min;
(4) adopt the finished product of mode to step (3) of temperature programming to heat-treat, and keep 30h; Described heating schedule is: from the temperature rise rates of 25 DEG C to 320 DEG C be 20 DEG C/temperature rise rate of min, 320-330 DEG C is 5 DEG C/temperature rise rate of min, 330-370 DEG C is 10 DEG C/min;
(5) water of-10 DEG C and the mixed solution of alcohol 1:1 is adopted to cool the sample after step (4) processes fast, and in the post-drying of 1h;
(6) cut into slices to the sample after oven dry in step (5), the slice thickness obtained is 50 μm;
(7) section of hydrogen plasma to step (6) is adopted to carry out modification;
(8) adopt the section of ozone plasma to step (7) to carry out modification, namely obtain described solar panels poly tetrafluoroethylene.
Embodiment 2
(1) mass ratio is followed successively by the kerosene of 50:2:3:3, perfluorocarboxylic acid ammonium salt, polyene-based succimide, ethyl acetate mix, form double solvents; In described kerosene, the content of isoparaffin is 85wt%, and the content of normal paraffin is 12wt%;
(2) double solvents of step (1) and Potassium Persulphate are added in polytetrafluorethylepowder powder, stir after 0.5h under the constant temperature of 10 DEG C, with the speed of 50r/min, then in nitrogen atmosphere, under 32 DEG C of constant temperature slaking 12h, obtain slaking material;
Wherein, the purity of described polytetrafluorethylepowder powder is 99.9%, degree of crystallinity≤80%, particle diameter are 0.1-0.2 μm, molecular weight is 1,200 ten thousand, the mass ratio of the kerosene in polytetrafluorethylepowder powder and double solvents is 20: 1, and the mass ratio of polytetrafluorethylepowder powder and Potassium Persulphate is 1000: 1;
(3) carry out compression molding process to the slaking material of step (2), the pressure of pre-molding is 65MPa, and squeeze time is 10min, and pressurize 12.5min;
(4) adopt the finished product of mode to step (3) of temperature programming to heat-treat, and keep 36h; Described heating schedule is: from the temperature rise rates of 25 DEG C to 320 DEG C be 20 DEG C/temperature rise rate of min, 320-330 DEG C is 5 DEG C/temperature rise rate of min, 330-370 DEG C is 10 DEG C/min;
(5) water of 0 DEG C and the mixed solution of alcohol 1:0.5 is adopted to cool the sample after step (4) processes fast, and in the post-drying of 2h;
(6) cut into slices to the sample after oven dry in step (5), the slice thickness obtained is 100 μm;
(7) section of hydrogen plasma to step (6) is adopted to carry out modification;
(8) adopt the section of ozone plasma to step (7) to carry out modification, namely obtain described solar panels poly tetrafluoroethylene.
Embodiment 3
(1) mass ratio is followed successively by the kerosene of 45:1.5:2:2, perfluorocarboxylic acid ammonium salt, perfluoro octyl sulfonic acid sodium, toluene mixes, form double solvents, then add bisphenol A type epoxy resin in described double solvents, obtain compound;
Wherein, the mass ratio of the kerosene in described bisphenol A type epoxy resin and double solvents is 1: 3; In described kerosene, the content of isoparaffin is 87wt%, and the content of normal paraffin is 9wt%;
(2) compound of step (1) and Potassium Persulphate are added in polytetrafluorethylepowder powder, stir after 0.5h under the constant temperature of 18 DEG C, with the speed of 80r/min, then in nitrogen atmosphere, under 40 DEG C of constant temperature slaking 8h, obtain slaking material;
Wherein, the purity of described polytetrafluorethylepowder powder is 99.9%, degree of crystallinity≤80%, particle diameter are 0.1-0.2 μm, molecular weight is 1,000 ten thousand, the mass ratio of the kerosene in polytetrafluorethylepowder powder and double solvents is 20: 1, and the mass ratio of polytetrafluorethylepowder powder and Potassium Persulphate is 1285: 1;
(3) carry out compression molding process to the slaking material of step (2), the pressure of pre-molding is 52.5MPa, and squeeze time is 1min, and pressurize 20min;
(4) adopt the finished product of mode to step (3) of temperature programming to heat-treat, and keep 24h; Described heating schedule is: from the temperature rise rate of normal temperature to 320 DEG C be 20 DEG C/temperature rise rate of min, 320-330 DEG C is 5 DEG C/temperature rise rate of min, 330-370 DEG C is 10 DEG C/min;
(5) water of-5 DEG C and the mixed solution of alcohol 1:0.75 is adopted to cool the sample after step (4) processes fast, and in the post-drying of 1.5h;
(6) cut into slices to the sample after oven dry in step (5), the slice thickness obtained is 75 μm;
(7) section of hydrogen plasma to step (6) is adopted to carry out modification;
(8) adopt the section of ozone plasma to step (7) to carry out modification, namely obtain described solar panels poly tetrafluoroethylene.
Comparative example 1
(1) by mass ratio be 40: 1 sherwood oil mix with Sodium perfluorooctanoate, formed double solvents;
(2) double solvents of step (1) is added in polytetrafluorethylepowder powder, stirs after 0.5h under the constant temperature of 14 DEG C, with the speed of 20r/min, then in nitrogen atmosphere, under 24 DEG C of constant temperature slaking 10h, obtain slaking material;
Wherein, the purity of described polytetrafluorethylepowder powder is 99.9%, degree of crystallinity≤80%, particle diameter are 0.1-0.2 μm, molecular weight is 8,000,000, and the mass ratio of polytetrafluorethylepowder powder and sherwood oil is 20: 1;
(3) carry out compression molding process to the slaking material of step (2), the pressure of pre-molding is 40MPa, and squeeze time is 5.5min, and pressurize 5min;
(4) finished product of mode to step (3) of temperature programming is adopted to heat-treat, described heating schedule is: be 20 DEG C/min from the temperature rise rates of 25 DEG C to 320 DEG C, the temperature rise rate of 320-330 DEG C is 5 DEG C/temperature rise rate of min, 330-370 DEG C is 10 DEG C/min;
(5) water of-5 DEG C is adopted to cool the sample after step (4) process fast, and in the post-drying of 0.5h;
(6) cut into slices to the sample after oven dry in step (5), the slice thickness obtained is 50 μm;
(7) section of hydrogen plasma to step (6) is adopted to carry out modification;
(8) adopt the section of ozone plasma to step (7) to carry out modification, namely obtain described solar panels poly tetrafluoroethylene.
Experimental example 1
In the scope that wavelength is 300-1200nm, test the transmittance of the solar panels solar cell package cephacoria that embodiment of the present invention 1-3 and comparative example 1 obtain, result is as shown in table 1.
The transmittance (%) of table 1 embodiment 1-3 and comparative example 1
| Test condition | 25±2℃ | 250 ± 5 DEG C, heating 1h | 300 ± 5 DEG C, heating 5min |
| Embodiment 1 | 92 | 92 | 92.5 |
| Embodiment 2 | 91 | 91 | 91.5 |
| Embodiment 3 | 90.5 | 91.5 | 92 |
| Comparative example 1 | 52.1 | 58.4 | 66.1 |
As can be seen from Table 1, compared with comparative example 1, the present invention passes through first by the double solvents of specific composition and polytetrafluorethylepowder powder mixing post curing, carry out mold pressing to slaking material again and the polytetrafluoroethylene film obtained has very high light transmission, the transmittance that to make at wavelength be solar cell package cephacoria within the scope of 300 ~ 1200nm can reach more than 90.5%.
Experimental example 2
Test the weathering resistance of the solar panels solar cell package cephacoria that embodiment of the present invention 1-3 and comparative example 1 obtain, result is as shown in table 2.
The weather resistance index of table 2 embodiment 1-3 and comparative example 1
| Low temperature resistant | The highest life-time service temperature | The highest moment use temperature | |
| Embodiment 1 | -186℃ | 260℃ | 280℃ |
| Embodiment 2 | -180℃ | 258℃ | 280℃ |
| Embodiment 3 | -180℃ | 258℃ | 280℃ |
| Comparative example 1 | -170℃ | 249℃ | 280℃ |
As can be seen from Table 2, compared with comparative example 1, low temperature resistant and the resistance to elevated temperatures of the solar panels solar cell package cephacoria that embodiment of the present invention 1-3 obtains is obtained for lifting, illustrate that preparation method of the present invention passes through first by the double solvents of specific composition and polytetrafluorethylepowder powder mixing post curing, again compression molding is carried out to slaking material, be conducive to the weathering resistance of reinforced TFE film, and then improve the weathering resistance of the final solar cell package cephacoria formed.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain of the invention.
Claims (7)
1. a solar panels poly tetrafluoroethylene, is characterized in that, is made up of the raw material of following weight part:
Kerosene 40-50;
Initiator 0.5-1;
Dispersion agent 1-2;
Tensio-active agent 1-3;
Solubility promoter 1-3;
Polytetrafluorethylepowder powder 800-1000;
Epoxy resin 10-20.
2. a kind of solar panels poly tetrafluoroethylene according to claim 1, is characterized in that described a kind of solar panels poly tetrafluoroethylene, is made up of the raw material of following weight part:
Kerosene 45;
Initiator 0.7;
Dispersion agent 1.5;
Tensio-active agent 2;
Solubility promoter 2;
Polytetrafluorethylepowder powder 900;
Epoxy resin 15.
3. a kind of solar panels poly tetrafluoroethylene according to claim 1 and 2, is characterized in that described initiator is Potassium Persulphate; Described dispersion agent is perfluorocarboxylic acid ammonium salt; Described solubility promoter is one or more in toluene, hexylene glycol or ethyl acetate; Described tensio-active agent is one or more in polyene-based succimide, Sodium perfluorooctanoate or perfluoro octyl sulfonic acid sodium, and described epoxy resin is bisphenol A type epoxy resin.
4. a kind of solar panels poly tetrafluoroethylene according to claim 1 and 2, is characterized in that the purity of described polytetrafluorethylepowder powder is 99.9%, degree of crystallinity≤80%, particle diameter are 0.1-0.2 μm, molecular weight is 8,000,000-1,200 ten thousand.
5. a preparation method for solar panels poly tetrafluoroethylene, is characterized in that, comprises the steps:
(1) kerosene, dispersion agent, epoxy resin, tensio-active agent and solubility promoter are uniformly mixed, form double solvents;
(2) double solvents of step (1) and initiator are added in polytetrafluorethylepowder powder, after stirring under the constant temperature of 10-18 DEG C, with the speed of 20-80r/min, again in inert atmosphere, cooked at constant 8-12h at 24-40 DEG C, obtain slaking material;
(3) compression molding is carried out to the slaking material of step (2);
(4), after the finished product of step (3) being left standstill 24h, heat-treat, and keep 24-36h; Described heat treated heating schedule is: from the temperature rise rates of 25 DEG C to 320 DEG C be 20 DEG C/temperature rise rate of min, 320-330 DEG C is 5 DEG C/temperature rise rate of min, 330-370 DEG C is 10 DEG C/min;
(5) cooling liquid is used to cool the sample after step (4) process fast with the rate of temperature fall of 40-60 DEG C/min, and in the post-drying of 1-2h;
(6) sample after oven dry in step (5) is cut into slices;
(7) section of hydrogen plasma to step (6) is adopted to carry out modification;
(8) adopt the section of ozone plasma to step (7) to carry out modification, namely obtain described solar panels poly tetrafluoroethylene.
6. the preparation method of a kind of solar panels poly tetrafluoroethylene according to claim 5, is characterized in that in described step (3), and the pressure of pre-molding is 40-65MPa, and squeeze time is 1-10min, and pressurize 5-20min.
7. the preparation method of a kind of solar panels poly tetrafluoroethylene according to claim 5, it is characterized in that the cooling liquid in step (5) is the water of-10 ~ 0 DEG C and the mixed solution of alcohol, in described mixed solution, the mass ratio of water and alcohol is 1:0.5-1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510610701.1A CN105255078A (en) | 2015-09-23 | 2015-09-23 | Polytetrafluoroethylene film for solar panels, and making method thereof |
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|---|---|---|---|
| CN201510610701.1A CN105255078A (en) | 2015-09-23 | 2015-09-23 | Polytetrafluoroethylene film for solar panels, and making method thereof |
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| CN105255078A true CN105255078A (en) | 2016-01-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108892903A (en) * | 2018-06-25 | 2018-11-27 | 中山市绿浪助剂有限公司 | Polytetrafluoroethylene film and preparation method thereof |
| CN110079223A (en) * | 2019-05-15 | 2019-08-02 | 王崧 | It is a kind of it is high adherency, low permeable photovoltaic cell component packaging EVA adhesive film |
-
2015
- 2015-09-23 CN CN201510610701.1A patent/CN105255078A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108892903A (en) * | 2018-06-25 | 2018-11-27 | 中山市绿浪助剂有限公司 | Polytetrafluoroethylene film and preparation method thereof |
| CN110079223A (en) * | 2019-05-15 | 2019-08-02 | 王崧 | It is a kind of it is high adherency, low permeable photovoltaic cell component packaging EVA adhesive film |
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Application publication date: 20160120 |