Hydrophilic retention process of micro nozzle on polyimide surface

Xiang ZHAO; Kang-sheng ZHANG; Yong LI; Kai ZHOU

doi:10.3788/OPE.20182609.2198

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Hydrophilic retention process of micro nozzle on polyimide surface

更新时间：2020-08-13

- Hydrophilic retention process of micro nozzle on polyimide surface
- Optics and Precision Engineering Vol. 26, Issue 9, Pages: 2198-2204(2018)
- 作者机构：
  
  1.北京科技大学机械工程学院, 北京 100083
  2.清华大学机械工程系精密超精密制造装备及控制北京市重点实验室, 北京 100084
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20182609.2198
  CLC： TH162.1
- Received：14 November 2017，
  
  Accepted：11 December 2017，
  
  Published：25 September 2018
- 稿件说明：
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Xiang ZHAO, Kang-sheng ZHANG, Yong LI, et al. Hydrophilic retention process of micro nozzle on polyimide surface[J]. Optics and precision engineering, 2018, 26(9): 2198-2204.
DOI：

Xiang ZHAO, Kang-sheng ZHANG, Yong LI, et al. Hydrophilic retention process of micro nozzle on polyimide surface[J]. Optics and precision engineering, 2018, 26(9): 2198-2204. DOI： 10.3788/OPE.20182609.2198.

摘要

在聚酰亚胺材料上加工用于喷墨打印头的喷孔时，广泛采用激光打孔后填充亲水聚合物使喷孔内壁具有一定的亲水性，从而有利于提升打印头的工作频率。为了简化喷孔的制备工艺，本文提出一种使用氧气与氩气混合等离子体处理的方法，在引入亲水基团的同时增大表面粗糙度，克服通常等离子体处理中聚酰亚胺表面亲水性随着时间增加而逐渐丧失的局限，以期能够长时间维持亲水性。实验结果表明，经过长时间放置后，聚酰亚胺表面能够维持一定的亲水性，表面的接触角能够保持在50°~60°。最后，通过仿真分析验证了亲水性提升对于喷墨打印中墨滴填充的有利影响，墨滴填充时间由140

s缩短至70

s。

Abstract

When processing the polyimide material used to fabricate the nozzles of an inkjet printer head

it is necessary for the inner wall of the nozzle to be hydrophilic so that the operating frequency of the print head can be maximized. Currently

laser drilling followed by hydrophilic polymer filling is commonly used to achieve this. In an attempt to simplify the nozzle preparation process

the present study set out to devise a plasma-based method using a mixture of oxygen and argon

to simultaneously introduce hydrophilic groups and increase the surface roughness

overcome the issue of hydrophilicity loss with an increase in the duration of the plasma processing

and ensure that the hydrophilicity is maintained throughout the lifetime of the print head. The results of our experiments reveal that the surface of the polyimide continues to be hydrophilic after an extended duration

with a surface contact angle maintained in 50°-60°. The results of a simulation-based analysis demonstrate that the hydrophilic enhancement has a beneficial effect on droplet filling in the print head

with the fill time being shortened from 140 to 70

关键词

Keywords

references

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