A Cr Anti-Sticking Layer for Improving Mold Release Quality in Electrochemical Replication of PVC Optical Molds
Abstract
:1. Introduction
2. Experiment Description
2.1. Materials and Experiment Steps
2.2. Experiment Parameters
2.3. Experiment Characterizations
2.3.1. Release Strength
2.3.2. Surface Roughness
2.3.3. Microscopic Morphology
2.3.4. Surface Energy
2.3.5. Retro-Reflection Coefficient
3. Results
3.1. Surface Energy of the Original Mold
3.2. Roughness and Morphology under Two Different Sputtering Conditions
3.3. Release Strength
3.4. Retro-Reflection Coefficient
4. Discussion
4.1. Mechanism of Anti-Sticking Layer Conducive to Demolding
4.2. Effect of Anti-Sticking Layer on Surface Roughness of Original Mold and Nickel Mold
5. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Target Material | Power (W) | Time (s) | Temperature (°C) |
---|---|---|---|
Cr | 200 | 15 | 30 |
Ag | 200 | 300 | 30 |
Parameters of Electrodeposition | Value |
---|---|
Nickel aminosulfonate | 250–450 g·L−1 |
Nickel dichloride | 5–30 g·L−1 |
Boric acid | 30–40 g·L−1 |
Lauryl sodium sulfate | 0.06–0.2 g·L−1 |
current density | 4 A·dm−2 |
temperature | 50 °C |
time | 3.5 h |
pH | 3.5–4.0 |
Testing Liquids | Temperature (°C) | γp (mN/m) | γd (mN/m) | γ (mN/m) |
---|---|---|---|---|
Pure water | 20 | 51.00 | 21.80 | 72.8 |
Diiodomethane | 20 | 0 | 50.80 | 50.8 |
Different States | Contact Angle (°C) | Contact Angle of CB Model (°C) | γ (mN/m) | ||
---|---|---|---|---|---|
Pure Water Diiodomethane | Pure Water Diiodomethane | ||||
Before sputtering | 87.56 | 56.89 | 88.47 | 60.25 | 31.47 |
After sputtering | 97.41 | 86.73 | 106.40 | 86.97 | 15.53 |
Scheme | Release Strength |
---|---|
1 | 1.94 N/cm |
2 | 1.43 N/cm |
Scheme | Retro-Reflection Coefficient |
---|---|
1 | 1600 cd·lx−1·m−2 |
2 | 2100 cd·lx−1·m−2 |
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Li, Y.; Yang, G.; Wu, Q.; Cheng, J.; Hu, Z. A Cr Anti-Sticking Layer for Improving Mold Release Quality in Electrochemical Replication of PVC Optical Molds. Micromachines 2019, 10, 702. https://doi.org/10.3390/mi10100702
Li Y, Yang G, Wu Q, Cheng J, Hu Z. A Cr Anti-Sticking Layer for Improving Mold Release Quality in Electrochemical Replication of PVC Optical Molds. Micromachines. 2019; 10(10):702. https://doi.org/10.3390/mi10100702
Chicago/Turabian StyleLi, Yue, Guang Yang, Qihui Wu, Jun Cheng, and Zhichao Hu. 2019. "A Cr Anti-Sticking Layer for Improving Mold Release Quality in Electrochemical Replication of PVC Optical Molds" Micromachines 10, no. 10: 702. https://doi.org/10.3390/mi10100702