物理化学学报 >> 2024, Vol. 40 >> Issue (4): 2304024.doi: 10.3866/PKU.WHXB202304024

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激光诱导羟基磷灰石夹层纸表面碳化实现无墨打印

王俊鉴1,2,†, 于清泉1,†, 刘舜尧1, 陈玉客1, 刘晓雨1,3, 李国栋4, 刘晓燕1,*(), 刘宏1,3, 周伟家1,*()   

  1. 1 济南大学化学化工学院, 前沿交叉科学研究院, 济南 250022
    2 济南大学材料科学与工程学院, 济南 250022
    3 山东大学, 晶体材料国家重点实验室, 济南 250100
    4 齐鲁工业大学(山东省科学院), 生物基材料与绿色造纸国家重点实验室, 济南 250353
  • 收稿日期:2023-04-13 修回日期:2023-06-06 录用日期:2023-06-08 发布日期:2023-06-16
  • 通讯作者: Email: ifc_liuxy@ujn.edu.cn (刘晓燕)ifc_zhouwj@ujn.edu.cn (周伟家)
  • 作者简介:

    †These authors contributed equally to this work.

  • 基金资助:
    国家自然科学基金(52022037); 国家自然科学基金(52102171); 山东省泰山学者(tsqn201812083); 山东省自然科学基金(2021CXGC010603); 山东省自然科学基金(ZR2021JQ15); 山东省自然科学基金(ZR2020QE071); 山东省自然科学基金(ZR2020LLZ006); 山东省自然科学基金(ZR2021MB035); 济南创新团队(2021GXRC019)

Laser-Induced Carbonization of Hydroxyapatite Sandwich Paper for Inkless Printing

Junjian Wang1,2, Qingquan Yu1, Shunyao Liu1, Yuke Chen1, Xiaoyu Liu1,3, Guodong Li4, Xiaoyan Liu1,*(), Hong Liu1,3, Weijia Zhou1,*()   

  1. 1 Institute for Advanced Interdisciplinary Research (iAIR), School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
    2 School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
    3 State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
    4 State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
  • Received:2023-04-13 Revised:2023-06-06 Accepted:2023-06-08 Published:2023-06-16
  • Contact: Email: ifc_liuxy@ujn.edu.cn (Xiaoyan Liu)ifc_zhouwj@ujn.edu.cn (Weijia Zhou)
  • Supported by:
    the National Natural Science Foundation of China(52022037); the National Natural Science Foundation of China(52102171); the Taishan Scholar Project of Shandong Province(tsqn201812083); the Natural Science Foundation of Shandong Province(2021CXGC010603); the Natural Science Foundation of Shandong Province(ZR2021JQ15); the Natural Science Foundation of Shandong Province(ZR2020QE071); the Natural Science Foundation of Shandong Province(ZR2020LLZ006); the Natural Science Foundation of Shandong Province(ZR2021MB035); the Innovative Team Project of Jinan(2021GXRC019)

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摘要：

传统的油墨打印具有方便快捷的优势，但打印过程中墨水或碳粉的大量使用对人体和环境造成了不可忽视的危害。基于激光的高能粒子特性和光热辐射热效应，利用激光欠焦和聚焦两种工作模式，可实现激光无墨打印和微区加工。本文报道了一种基于羟基磷灰石的“有机-无机-有机”三明治结构多功能纸，并利用激光的光热辐射效应使功能纸表层有机材料——纤维素纤维表面温度升高，实现表层均匀碳化，夹层无机材料——羟基磷灰石阻挡能量继续传导防止纸张烧穿，以此来达到无墨打印的效果。基于激光烧蚀的无墨打印，能够显著降低打印成本，有利于激光烧蚀打印技术的推广。此外，采用激光烧蚀打印技术作用于功能纸上的打印效果具有稳定、绿色环保等特点，在档案存储用纸、食品包装用纸和后天致盲患者阅读等方面具有广泛的应用。

关键词: 激光, 羟基磷灰石, 夹层纸, 无墨打印

Abstract:

Traditional ink printing is convenient, but the excessive use of ink in this process has harmed both human health and the environment. Inkless printing technologies are mainly thermal and photosensitive in nature; however, they are susceptible to environmental impact, resulting in unstable printing and easy fading. In recent years, laser ablation printing technology has received considerable attention. However, the energy of the laser acting on the paper surface is affected by the surface roughness and tightness of the paper, which makes it difficult to obtain a uniform printing effect. Therefore, a complex and expensive paper-laser monitoring feedback system is required for modulating the laser parameters in real time to obtain uniform printing; however, such a system is not conducive to the popularization of laser ablation printing technology. To address this issue, a laser-induced inkless printing method, combined with micro-zone processing, is proposed. The associated high-energy characteristics and the thermal effect of laser are examined in this study. A multifunctional paper with an "organic-inorganic-organic" sandwich structure is constructed by vacuum filtration combined with thermocompression, using hydroxyapatite as the thermal insulating layer and wood fiber as the carbonized layer. The obtained functional papers display high flexibility, high tensile strength, and excellent flame resistance. Laser-induced inkless printing is realized via laser under-focusing or laser focusing onto hydroxyapatite sandwich paper. When the laser is irradiated on the surface of the functional paper, the surface-located cellulose fibers are carbonized due to the photothermal radiation effect of the laser, leaving graphitized carbon on the surface of hydroxyapatite layer. Notably, the hydroxyapatite in the interlayer of the functional paper is an outstanding thermal insulation material, which can effectively prevent further transfer of laser energy. Thus, owing to the sandwich structure of the multifunctional paper, laser inkless printing of both words and patterns is realized. This innovative approach offers a sustainable solution to traditional ink printing, while also providing a new avenue for micro-zone processing. The printed text or patterns can be preserved in harsh environments for long periods to be used for the storage of archival data. Meanwhile, the laser inkless printing method provides a new kind of touch reading material for acquired blindness, which avoids long-term contact with toxic printing ink. This study demonstrates that the hydroxyapatite sandwich paper is critical to realizing laser inkless printing without using expensive monitoring feedback systems, thus significantly reducing printing costs and effectively mitigating environmental pollution, marking it as an ideal technology for widespread adoption.

Key words: Laser, Hydroxyapatite, Sandwich structure paper, Ink-free printing