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Article

Capillary Effect Enhancement in a Plastic Capillary Tube by Nanostructured Surface

1
Advanced Manufacturing Research Institute, National Institute of Advanced Industrial Science and Technology, AIST, 1-2-1 Namiki, Tsukuba, Ibaraki 305–8564, Japan
2
Research Institute for Energy Conservation, National Institute of Advanced Industrial Science and Technology, AIST, 1-2-1 Namiki, Tsukuba, Ibaraki 305–8564, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Hiroshi Ito
Polymers 2021, 13(4), 628; https://doi.org/10.3390/polym13040628
Received: 29 January 2021 / Revised: 13 February 2021 / Accepted: 15 February 2021 / Published: 19 February 2021
(This article belongs to the Special Issue Precise Polymer Processing Technology)
We investigated the enhancement of the capillary effect in a plastic capillary tube using only a nanostructured surface. Since plastic is a hydrophobic material, the capillary effect does not emerge without an additional coating or plasma treatment process. Therefore, capillary effect enhancement by the nanostructure fabrication method is expected to reduce the cost and minimise the contamination produced in the human body. By combining a hydrophilic nylon resin and a nanostructure at the tip of the plastic pipette, we could confirm that the capillary effect was produced solely by the tube fabrication process. The produced capillary effect increased linearly with increasing nanostructure height when a standard solution with a surface tension of 70 mN·m−1 was used. Thus, we can conclude that including the plastic part with nanostructure can be useful for biomedical applications. In addition, we suggest that the proposed method is highly effective in controlling the wetting properties of plastic surfaces, compared to the typical coating or plasma treatment processes. View Full-Text
Keywords: wettability control; injection moulding process; nanostructure; hydrophilic surface; capillary effect wettability control; injection moulding process; nanostructure; hydrophilic surface; capillary effect
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MDPI and ACS Style

Kurihara, K.; Hokari, R.; Takada, N. Capillary Effect Enhancement in a Plastic Capillary Tube by Nanostructured Surface. Polymers 2021, 13, 628. https://doi.org/10.3390/polym13040628

AMA Style

Kurihara K, Hokari R, Takada N. Capillary Effect Enhancement in a Plastic Capillary Tube by Nanostructured Surface. Polymers. 2021; 13(4):628. https://doi.org/10.3390/polym13040628

Chicago/Turabian Style

Kurihara, Kazuma, Ryohei Hokari, and Naoki Takada. 2021. "Capillary Effect Enhancement in a Plastic Capillary Tube by Nanostructured Surface" Polymers 13, no. 4: 628. https://doi.org/10.3390/polym13040628

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