Scholarlink

<p>Polyurethane elastomer (TPU) luminescent materials produced through selective laser sintering (SLS) technology exhibit excellent performance and are widely utilized. However, the direct filling method for preparing TPU luminescent materials faces challenges due to a significant morphological mismatch between the luminescent filler and TPU, which adversely affects processing performance. To address this issue, this study developed modified waterborne polyurethane (CWPU) emulsions containing varying amounts of 7-hydroxy-4-methylcoumarin and applied them to TPU surfaces, creating TPU/CWPU luminescent materials. The research investigated the effects of coumarin content and coating layers on the luminescent and mechanical properties of TPU/CWPU. Results indicated that the CWPU emulsion exhibits blue luminescence under ultraviolet light, with a peak emission at 395&#xa0;nm. The TPU/CWPU composite displays an emission range from 390 to 550&#xa0;nm, with intensity increasing with higher coumarin content and additional coating layers. The optimal coumarin concentration was found to be 0.5&#xa0;wt%, with three coating layers identified as the ideal configuration. The CWPU-cured film demonstrated excellent water resistance and thermal stability, with TPU/CWPU-0.5 exhibiting 130% and 113% increases in tensile strength and elongation at break, respectively, compared to pure TPU. These enhancements further improved to 4.11&#xa0;MPa and 439% with three coating layers. This study provides valuable insights for future research on luminescent coatings for SLS-printed components.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Study of coumarin-modified luminescent waterborne polyurethane coated 3D printed TPU luminescent materials

  • 期刊论文

  • 发表日期：

    2025年11月21日

查看全文
  • Qiuyang Yu,
  • Wei Wu,
  • Huanbo Hu,
  • Junjian Ye,
  • Lu Cui,
  • Zhigang Zhan,
  • Changxi Chen

摘要

Polyurethane elastomer (TPU) luminescent materials produced through selective laser sintering (SLS) technology exhibit excellent performance and are widely utilized. However, the direct filling method for preparing TPU luminescent materials faces challenges due to a significant morphological mismatch between the luminescent filler and TPU, which adversely affects processing performance. To address this issue, this study developed modified waterborne polyurethane (CWPU) emulsions containing varying amounts of 7-hydroxy-4-methylcoumarin and applied them to TPU surfaces, creating TPU/CWPU luminescent materials. The research investigated the effects of coumarin content and coating layers on the luminescent and mechanical properties of TPU/CWPU. Results indicated that the CWPU emulsion exhibits blue luminescence under ultraviolet light, with a peak emission at 395 nm. The TPU/CWPU composite displays an emission range from 390 to 550 nm, with intensity increasing with higher coumarin content and additional coating layers. The optimal coumarin concentration was found to be 0.5 wt%, with three coating layers identified as the ideal configuration. The CWPU-cured film demonstrated excellent water resistance and thermal stability, with TPU/CWPU-0.5 exhibiting 130% and 113% increases in tensile strength and elongation at break, respectively, compared to pure TPU. These enhancements further improved to 4.11 MPa and 439% with three coating layers. This study provides valuable insights for future research on luminescent coatings for SLS-printed components.