Hydrophobicity Recovery Study for COC Materials Based on Microfluidic
[1]Li Yang,Zheng Yanping,Liang Shuai,et al.Hydrophobicity Recovery Study for COC Materials Based on Microfluidic[J].Journal of Zhengzhou University (Engineering Science),2021,42(03):81-.[doi:10.13705/j.issn.1671-6833.2021.03.014]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
42卷
Number of periods:
2021 03
Page number:
81-
Column:
Public date:
2021-05-10
- Title:
- Hydrophobicity Recovery Study for COC Materials Based on Microfluidic
- Keywords:
- hydrophobicity recovery; timeliness; plasma treatment; cycloolefin copolymers; microfluidics
- CLC:
- -
- DOI:
- 10.13705/j.issn.1671-6833.2021.03.014
- Abstract:
- In order to improve the structural stability of the chip without affecting the function of the chip, the surface of the chip material COC (cyclic olefin copolymer) was studied. The highly hydrophilic surface of COC material after air plasma treatment has obvious timeliness. By adjusting parameters such as plasma cleaning power, time and placement temperature, the timeliness after hydrophilic treatment could be amplified and the recovery of COC hydrophobicity could be realized. The experimental results showed that: using this method, the contact angle of COC surface changed from 90° to 25°±2.1° and then to 83°±1.5°. The bonding strength increased from instability to 0.051 MPa. X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) showed that the treatment process only modified the surface and did not affect the deep structure of the material itself. The main reason for the improvement of bonding strength was the introduction of oxygen-containing functional groups such as hydroxyl, carboxyl and carbonyl. Finally, the feasibility of this method in microfluidic devices was verified by droplet generation experiments.
- References:
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Last Update:
2021-06-24