紫外脉冲激光辐射散焦对聚醚醚酮 LIG 合成的影响

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials Pub Date : 2024-10-28 DOI:10.1016/j.diamond.2024.111701

Meng Wu , Fei Wang , Xin Gao , Yuyao Li , Chengshuang Zhang , Yanling Bao , Yingbo Ruan , Mingjun Zhang , Zhongmin Su

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引用次数: 0

摘要

激光诱导石墨烯（LIG）技术是一种在常温条件下通过激光直接写入碳前驱体制备三维多孔石墨烯的技术，因其成本低、效率高而得到广泛应用。然而，关于离焦对 LIG 合成的影响的研究仍然缺乏。本文利用紫外激光在聚醚醚酮（PEEK）薄膜上制备 LIG，并建立了该过程的有限元模拟，以推断温度场。在保持单位面积辐射能量不变的情况下，研究了散焦对 PEEK-LIG 的结构、形态、比表面积 SSA 和电性能的影响。结果表明，散焦通过影响表面和厚度方向的温度场分布，改变了 PEEK-LIG 的结构和形态，从而影响了 LIG 的性能，其中比表面积 Sdr 并不单调地依赖于散焦量。当紫外激光接近 LIG 形成阈值处的束腰时，Sdr 达到最大值，从而提高了导电性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Influence of defocusing of UV pulse laser radiation on LIG synthesis on Polyetheretherketone

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Influence of defocusing of UV pulse laser radiation on LIG synthesis on Polyetheretherketone

Laser-induced graphene (LIG) technology, a technique for preparing three-dimensional porous graphene by laser direct writing on carbon precursors under ambient condition, has been widely used due to its low cost and high efficiency. However, there is still a lack of research on the influence of the defocusing on LIG synthesis. In this paper, LIG is prepared by UV laser on Polyetheretherketone (PEEK) film, and a finite element simulation of this process is established to infer the temperature field. The influence of the defocusing on the structure, morphology, specific surface area SSA, and electrical properties of PEEK-LIG is investigated while maintaining the same energy radiated per unit area. The results show that the defocusing changes the structure and morphology of PEEK-LIG by affecting the temperature field distribution in both the surface and thickness directions, which affects the properties of LIG, where the surface area ratio S_dr does not depend on the defocusing amount monotonically. As the UV laser nears the beam waist at the threshold of LIG formation, S_dr has its maximum value and improves its electrical conductivity.

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来源期刊

Diamond and Related Materials 工程技术-材料科学：综合

CiteScore

6.00

自引率

14.60%

发文量

702

审稿时长

2.1 months

期刊介绍： DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices. The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.