Siloxane Bond Exchange Enables Sustainable Recycling of PDMS Coated Nylon 6,6 Airbag Fabrics
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Wiley
2026
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| author | Daeyul Kwon In Soo Han Woohwa Lee Seung Hyuk Hong Yong Seok Kim Youngjae Yoo |
| author_facet | Daeyul Kwon In Soo Han Woohwa Lee Seung Hyuk Hong Yong Seok Kim Youngjae Yoo Daeyul Kwon In Soo Han Woohwa Lee Seung Hyuk Hong Yong Seok Kim Youngjae Yoo |
| collection | Wiley Open Access |
| contents | Siloxane Bond Exchange Enables Sustainable Recycling of PDMS Coated Nylon 6,6 Airbag Fabrics Daeyul Kwon In Soo Han Woohwa Lee Seung Hyuk Hong Yong Seok Kim Youngjae Yoo Natural Sciences ABSTRACT The selective removal of polydimethylsiloxane (PDMS) coatings from nylon 6,6 airbag fabrics is essential for enabling circular reuse of high‐value technical textiles. In this study, a nonaqueous depolymerization method was developed using potassium hydroxide (KOH) as a catalyst in isopropyl alcohol (IPA) as the solvent, targeting siloxane bond exchange to cleave crosslinked PDMS networks. Among the solvents evaluated, IPA demonstrated optimal compatibility, enabling complete PDMS removal and efficient solvent recovery. KOH concentration emerged as a critical parameter, with 0.75 wt% resulting in effective depolymerization while minimizing the degradation of mechanical performance. Fourier‐transform infrared spectroscopy and scanning electron microscopy‐energy dispersive spectroscopy analyses confirmed the elimination of silicone residues and preservation of the nylon backbone. Mechanical and thermal characterizations demonstrated that key properties, including tensile strength, ductility, impact resistance, and heat deflection temperature (HDT), were retained after treatment. The proposed approach offers a scalable and fabric‐safe solution for the sustainable recycling of silicone‐coated textiles from end‐of‐life airbag materials, without the need for additional reinforcement or polymer modification. Key Points Applies siloxane exchange chemistry to enable selective depolymerization of silicone coatings. Combines polymer reaction engineering with solvent recovery strategies for scalable recycling. Connects materials chemistry and environmental engineering to advance circular use of airbag textiles. 10.1002/ntls.70039 http://creativecommons.org/licenses/by/4.0/ |
| doi_str_mv | 10.1002/ntls.70039 |
| format | Artículo Open Access |
| id | wiley_oa_10_1002_ntls_70039 |
| institution | Wiley Open Access |
| license_str_mv | http://creativecommons.org/licenses/by/4.0/ |
| publishDate | 2026 |
| publisher | Wiley |
| record_format | wiley_oa |
| spellingShingle | Siloxane Bond Exchange Enables Sustainable Recycling of PDMS Coated Nylon 6,6 Airbag Fabrics Daeyul Kwon In Soo Han Woohwa Lee Seung Hyuk Hong Yong Seok Kim Youngjae Yoo Natural Sciences Siloxane Bond Exchange Enables Sustainable Recycling of PDMS Coated Nylon 6,6 Airbag Fabrics Daeyul Kwon In Soo Han Woohwa Lee Seung Hyuk Hong Yong Seok Kim Youngjae Yoo Natural Sciences ABSTRACT The selective removal of polydimethylsiloxane (PDMS) coatings from nylon 6,6 airbag fabrics is essential for enabling circular reuse of high‐value technical textiles. In this study, a nonaqueous depolymerization method was developed using potassium hydroxide (KOH) as a catalyst in isopropyl alcohol (IPA) as the solvent, targeting siloxane bond exchange to cleave crosslinked PDMS networks. Among the solvents evaluated, IPA demonstrated optimal compatibility, enabling complete PDMS removal and efficient solvent recovery. KOH concentration emerged as a critical parameter, with 0.75 wt% resulting in effective depolymerization while minimizing the degradation of mechanical performance. Fourier‐transform infrared spectroscopy and scanning electron microscopy‐energy dispersive spectroscopy analyses confirmed the elimination of silicone residues and preservation of the nylon backbone. Mechanical and thermal characterizations demonstrated that key properties, including tensile strength, ductility, impact resistance, and heat deflection temperature (HDT), were retained after treatment. The proposed approach offers a scalable and fabric‐safe solution for the sustainable recycling of silicone‐coated textiles from end‐of‐life airbag materials, without the need for additional reinforcement or polymer modification. Key Points Applies siloxane exchange chemistry to enable selective depolymerization of silicone coatings. Combines polymer reaction engineering with solvent recovery strategies for scalable recycling. Connects materials chemistry and environmental engineering to advance circular use of airbag textiles. 10.1002/ntls.70039 http://creativecommons.org/licenses/by/4.0/ |
| title | Siloxane Bond Exchange Enables Sustainable Recycling of PDMS Coated Nylon 6,6 Airbag Fabrics |
| topic | Natural Sciences |
| url | https://onlinelibrary.wiley.com/doi/10.1002/ntls.70039 |