Scholarlink

<p>PDMS/NdFeB composites are promising materials for soft magnetic actuators, but NdFeB particles corrode in body fluids and release toxic metal ions, limiting their biomedical use. We developed ~ 100 µm spin-coated PDMS-chitosan (PDMS-CHIT) and PDMS-polycaprolactone (PDMS-PCL) coatings that solve this problem. Over 24 weeks of immersion, these coatings reduced neodymium and iron release by more than 95%, keeping ion concentrations well below cytotoxicity thresholds. Importantly, the PDMS-PCL coating fully preserved magnetorheological actuation (ΔG’ ≈ 61&#xa0;kPa under 0.5 T, comparable to uncoated composite), while PDMS-CHIT provided superior ion barrier at the cost of reduced actuation force. Biological validation confirmed cytocompatibility with fibroblasts, hemocompatibility with erythrocytes, and strong suppression of bacterial biofilm formation. These results establish a validated materials platform for biocompatible soft magnetic actuators.</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

Chitosan and polycaprolactone blended PDMS coatings improve biocompatibility of magnetic elastomers

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年2月12日

查看全文
  • Joanna Mystkowska,
  • Dawid Łysik,
  • Anna Czerniakiewicz,
  • Ewelina Piktel,
  • Piotr Deptuła,
  • Robert Bucki,
  • Dariusz Perkowski,
  • Jakub Augustyniak,
  • Arkadiusz Mystkowski

摘要

PDMS/NdFeB composites are promising materials for soft magnetic actuators, but NdFeB particles corrode in body fluids and release toxic metal ions, limiting their biomedical use. We developed ~ 100 µm spin-coated PDMS-chitosan (PDMS-CHIT) and PDMS-polycaprolactone (PDMS-PCL) coatings that solve this problem. Over 24 weeks of immersion, these coatings reduced neodymium and iron release by more than 95%, keeping ion concentrations well below cytotoxicity thresholds. Importantly, the PDMS-PCL coating fully preserved magnetorheological actuation (ΔG’ ≈ 61 kPa under 0.5 T, comparable to uncoated composite), while PDMS-CHIT provided superior ion barrier at the cost of reduced actuation force. Biological validation confirmed cytocompatibility with fibroblasts, hemocompatibility with erythrocytes, and strong suppression of bacterial biofilm formation. These results establish a validated materials platform for biocompatible soft magnetic actuators.