1. Viscosity
Use a viscometer to detect the viscosity of nano silver ink.
Second, the granularity
Use a particle size meter to detect the particle size of the nano silver ink.
3. Content test of volatile organic compounds
Coat the conductive ink on the plastic sheet and send it to the oven for 24 hours. Use an electronic balance to measure the difference in weight before and after entering the oven to determine the volatile organic compound content.
Four, hardness test
The conductive ink is coated on the plastic sheet, after baking and sintering at 150 ° C for 30 minutes, the hardness of the ink is tested using a pencil hardness tester.
5. Drying test
The conductive ink was coated on the plastic sheet, and baked at a temperature of 80 ° C, 150 ° C, and 180 ° C for 30 minutes, respectively, and the drying degree of the ink was observed.
Six, weather resistance test
Apply conductive ink to the plastic sheet, bake and sinter at 150 ° C for 30 minutes, place the test article in the QUV ultraviolet accelerated aging equipment, set the time for 168 hours, and observe its phenomenon.
7. Friction resistance test
Apply conductive ink to the plastic sheet, bake and sinter at 150 ° C for 30 minutes, then place the test article in the abrasion tester, set 1.82KG to rub 100 times and observe the result.
8. Density analysis
Apply conductive ink to the plastic sheet, bake and sinter at 150 ° C for 30 minutes, and then use a 100-knife knife and 3M-600 tape to observe the adhesion.
9. Conductivity analysis
The conductive ink was spray printed on the plastic sheet, after baking and sintering at 150 ° C for 30 minutes, the electrical conductivity was measured using a potentiometer.
Ten, film thickness test
The conductive ink is printed on the plastic sheet, after baking and sintering at 150 ° C for 30 minutes, the film thickness is measured using a hand-held film thickness meter.
11. Anti-chemical testing
Print the conductive ink on the plastic sheet. After baking and sintering at 150 ° C for 30 minutes, soak 10 sheets of filter paper in the solution (acid or alkali), place the filter paper on the plastic sheet, place a 1KG weight, and place it at a constant temperature. Place in a wet box for 24 hours and observe the resistance to chemicals after the ink has dried
results and analysis
According to the research method, the printing quality of Miyin ink was analyzed, and the following results were obtained.
1. Viscosity
Using a viscometer to detect the viscosity of nano silver ink, the viscosity value is 15cp. The viscosity of nano silver ink on the market is about 14 ~ 18cp.
Second, the granularity
The particle size of the nano silver ink is detected by a particle size meter, and the particle size value is about 12 nm.
3. Content test of volatile organic compounds
Using an electronic balance to measure the weight difference before and after entering the oven, the ink volatile organic compound content was determined to be 85%.
4. Hardness
The conductive ink is coated on the plastic sheet, and baked and sintered at 150 ° C for 30 minutes, and then tested with a pencil hardness tester, and the hardness is H.
5. Drying test
The conductive ink was coated on the plastic sheet, and baked at a temperature of 80 ° C, 150 ° C, and 180 ° C for 30 minutes, respectively, and the drying degree of the ink was observed.
Six, weather resistance test
The conductive ink is coated on the plastic sheet, after baking and sintering at 150 ° C for 30 minutes, the test article is placed in the QUV ultraviolet accelerated aging equipment for a set time of 168 hours, and the result is unchanged.
7. Friction resistance test
Coat the conductive ink on the plastic sheet, bake and sinter at 150 ° C for 30 minutes, place the test article in the friction resistance tester, set the friction of 1.82KG 100 times, the result does not pass, it is recommended to adjust the formula of the bridging agent.
8. Density analysis
Coat the conductive ink on the plastic sheet, bake and sinter at 150 ° C for 30 minutes, then use a 100-knife knife and 3M-600 tape to observe the adhesion of the test product. There are five levels of adhesion: 1B ~ 5B, 5B For the best, the ink test result is 4B.
9. Conductivity analysis
The conductive ink was spray printed on the plastic sheet, after baking and sintering at 150 ° C for 30 minutes, the electrical conductivity was measured using a potentiometer.
Ten, film thickness test
The conductive ink was printed on the plastic sheet, after baking and sintering at 150 ℃ for 30 minutes, using a hand-held film thickness meter, the film thickness was measured, and the thickness was 14 μm.
11. Anti-chemical testing
Print the conductive ink on the plastic sheet. After baking and sintering at 150 ° C for 30 minutes, soak 10 sheets of filter paper in the solution (acid or alkali), place the filter paper on the plastic sheet, place a 1KG weight, and place at constant Place in a wet box for 24 hours, and observe the resistance of the ink to chemicals after drying. The rating is 1 to 5, with 5 being the highest and the test result rating being 3.
conclusion and suggestion
In the analysis and testing process, the hardness test reaches H; the drying test sintering temperature is about 150 ℃, which is more suitable; the weather resistance test passes 168 hours, you can try to test more time; the wear resistance test, fail, the analysis needs to add the appropriate The bridging agent can only achieve the degree of poor wear resistance on the plastic; in terms of conductivity, the formula needs to be changed to reduce the resistance value; the anti-chemical test level is 3, you can try to adjust the formula to make the anti-chemical test The level can rise.
In view of this test result, in the future, we will use this as a basis for the lack of printability. Experts are recommended to let the ink developer adjust the ink formula so that the nano silver ink made by the Chinese can have better printing. Adaptability, as soon as possible to achieve commercial purposes.
references
Zhou Zhen, Wu Bing (2004). Formula design and production process of printing ink. Beijing: Chemical Industry
Lin Zhengxuan (2003). Combined with UV-LIGA and micro-discharge machining technology to produce micro-array perforated sheet mold core and injection molding research. Unpublished Master, Yunlin University of Science and Technology, Master Class, Mechanical Engineering Department, Yunlin County
Gao Zhenyu, Zhou Gengsheng (2010), research on printed nanomaterials and components of flexible electronics. PhD thesis, Department of Chemical Engineering, National Tsinghua University, unpublished, Hsinchu City.
Chen Zhonghui, Zhang Jiarong (2006) Discussion on the suitability and current status of inkjet printing paper. Printing technology. Volume 22. The first phase. pp. 1-14
American Society for Testing and Materials (1999). STANDARD PRACTICE FOR ABRASION RESISTANCE OF PRINTED MATERIALS BY THESUTHERLAND RUB TESTER (ASTM D 5264 -98). Manual-Free.com, Philadelphia: Author.
American Society for Testing and Materials (2011). Standard Test Method for FilmHardness by Pencil Test (ASTM D3363-05). Philadelphia: Author.
International Organization for Standardization (1974). Prints and printinginks — Assessment of light fastness (ISO2835). Geneva: Author.
International Organization for Standardization (1974) Prints and printing inks– Assessment of resistance to soaps (ISO2839: 1974). Geneva: Author.
International Organization for Standardization (1974) Prints and printing inks –Determination of the resistance of prints to detergents (ISO 2840). Geneva: Author.
Taiwan Bureau of Standards (Min 77). Method for measuring volume resistivity and conductivity of non-ferrous metal materials (CNS5129)
Taiwan Bureau of Standards (Min 96). General test methods for paints-Part 1-7: General rules-Film thickness measurement (CNS 15200-1-7)
Taiwan Bureau of Standards (Min 98). General Test Method for Paints-Part 5-6: Mechanical Properties of Coating Films: Adhesion Test (Square Method) (CNS 15200-5-6)
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