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<p>The application of material extrusion in vacuum and its combination with physical vapor deposition techniques such as vacuum arc coating technology opens new possibilities of functionalization of polymers during additive manufacturing. This allows to modify polymer surface properties such as thermal and electrical conductivity or radiation resistance. This is in particular interesting for in-space manufacturing and medical applications. In this work, the applicability of surface functionalization for UV protection of polymers was investigated. Therefore, an aluminum-based coating was chosen as a protective coating. The UV resistivity was assessed by testing the tensile properties of the specimens before and after radiation in dependence of coating parameters. The experimental results indicate that specimens coated with an <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="40964_2025_1061_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="43" /> </InlineMediaObject> <EquationSource Format="TEX">\(\hbox {Al}_{2}\hbox {O}_{3}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mtext>Al</mtext> <mn>2</mn> </msub> <msub> <mtext>O</mtext> <mn>3</mn> </msub> </mrow> </math></EquationSource> </InlineEquation> layer of <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="40964_2025_1061_Article_IEq2.gif" Format="GIF" Height="15" Rendition="HTML" Resolution="72" Type="Linedraw" Width="70" /> </InlineMediaObject> <EquationSource Format="TEX">\(\ge {200}\,\hbox {nm}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo>≥</mo> <mn>200</mn> <mspace width="0.166667em" /> <mtext>nm</mtext> </mrow> </math></EquationSource> </InlineEquation> retain their tensile strength when compared to untreated specimens, even after exposure to UV radiation. Hence, a <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="40964_2025_1061_Article_IEq3.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="51" /> </InlineMediaObject> <EquationSource Format="TEX">\({200}\,\hbox {nm}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>200</mn> <mspace width="0.166667em" /> <mtext>nm</mtext> </mrow> </math></EquationSource> </InlineEquation> thick coating is suitable to protect polymers from UV-C-induced degradation. This demonstrates the applicability of enhanced extrusion-based additive manufacturing as a promising method for in-space manufacturing, servicing and coating repair.</p>

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UV-protected polyetheretherketone structures via vacuum arc enhanced 3D printing

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年3月26日

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  • Marina Kühn-Kauffeldt,
  • Marvin Kühn,
  • Jay Phruekthayanon,
  • Jörg Gregor Diez,
  • Michael Mallon

摘要

The application of material extrusion in vacuum and its combination with physical vapor deposition techniques such as vacuum arc coating technology opens new possibilities of functionalization of polymers during additive manufacturing. This allows to modify polymer surface properties such as thermal and electrical conductivity or radiation resistance. This is in particular interesting for in-space manufacturing and medical applications. In this work, the applicability of surface functionalization for UV protection of polymers was investigated. Therefore, an aluminum-based coating was chosen as a protective coating. The UV resistivity was assessed by testing the tensile properties of the specimens before and after radiation in dependence of coating parameters. The experimental results indicate that specimens coated with an \(\hbox {Al}_{2}\hbox {O}_{3}\) Al 2 O 3 layer of \(\ge {200}\,\hbox {nm}\) ≥ 200 nm retain their tensile strength when compared to untreated specimens, even after exposure to UV radiation. Hence, a \({200}\,\hbox {nm}\) 200 nm thick coating is suitable to protect polymers from UV-C-induced degradation. This demonstrates the applicability of enhanced extrusion-based additive manufacturing as a promising method for in-space manufacturing, servicing and coating repair.