Processing–structure–property relationship in direct laser writing carbonization of polyimide,Journal of Applied Polymer Science

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Processing–structure–property relationship in direct laser writing carbonization of polyimide
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-01-19 , DOI: 10.1002/app.48978
Rui Wang ₁ , Xiaoshuang Duan ₁ , Jingwen Yao ₁ , Xiaojun Ruan ₁ , Yanbo Yao ₁ , Tao Liu ₁

Affiliation

Direct laser writing carbonization (DLWc) of polyimide has recently emerged as a versatile method for facile fabrication of a variety of functional devices. Up‐to‐date, there is still a lack of comprehensive and in‐depth experimental studies to understand the processing‐structure–property relationship involved in this promising technique. With assistance of methylene blue adsorption as an in situ porous structure characterization method along with scanning electron microscopy, Raman scattering spectroscopy, X‐ray photoelectron spectroscopy, and electrical property measurements, we systematically investigate the multiscale structure evolution and the electrical sheet resistance of the carbon lines fabricated by DLWc at varied laser processing conditions. The key processing parameters being investigated included: laser power (P ), laser beam scanning speed (S ), distance of laser beam waist to the surface of polyimide film (D ), and their combined effect—the averaged areal laser energy density—(E ). Quantitative relationships are established between these processing parameters and the specific surface area, the porosity, the degree of perfection of the layered carbon or graphitic basic structure units, as well as the electrical sheet resistance of the carbon lines created by DLWc. The comprehensive and quantitative processing‐multiscale structure–electrical property relationships for DLWc established in this study expect to be useful for better understanding the complicated photo‐thermally induced polyimide pyrolysis/carbonization process.

中文翻译：

聚酰亚胺直接激光写入碳化中的加工-结构-性质关系

聚酰亚胺的直接激光写入碳化（DLWc）近来已成为一种简便制造各种功能器件的通用方法。迄今为止，仍然缺乏全面而深入的实验研究来了解这种有前途的技术所涉及的加工结构与性能之间的关系。借助亚甲基蓝原位吸附多孔结构表征方法以及扫描电子显微镜，拉曼散射光谱，X射线光电子能谱和电性能测量，我们系统地研究了DLWc在不同的激光加工条件下制备的碳线的多尺度结构演变和薄层电阻。研究的关键加工参数包括：激光功率（P），激光束扫描速度（S），激光束腰到聚酰亚胺薄膜表面的距离（D）以及它们的综合效果-平均面激光能量密度-（Ë）。在这些处理参数与比表面积，孔隙率，层状碳或石墨基本结构单元的完善程度以及由DLWc创建的碳线的电气薄层电阻之间建立了定量关系。这项研究中建立的DLWc的全面和定量处理-多尺度结构-电特性关系有望有助于更好地理解复杂的光热诱导的聚酰亚胺热解/碳化过程。

更新日期：2020-01-19

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