Halloysit Nanotüp Takviyeli Poliüretan Nanolifli Membran: Yapısal, Termal, Mekanik ve Transport Özellikleri Üzerindeki Etkileri

Abstract

Poliüretan (PU) nanolifli membranlar, yüksek yüzey alanları, esneklikleri ve ayarlanabilir yüzey özellikleri nedeniyle filtrasyon, koruyucu tekstiller ve biyomedikal uygulamalar için umut verici malzemeler olarak önemli ilgi görmüştür. Ancak saf PU nanolifler çoğu zaman sınırlı mekanik dayanım ve bariyer performansı göstermektedir. Bu çalışmada, yapısal, termal, mekanik ve taşınım özellikleri üzerindeki HNT katkısının (1-5 a.% ) etkisini araştırmak amacıyla halloysit nanotüp (HNT) takviyeli PU nanolifli membranlar elektro-üflemeli çekim yöntemiyle üretilmiştir. SEM analizi, lif çapının saf PU’da 758±266 nm iken, %1 ve %3 HNT içeriğinde sırasıyla 656±147 nm ve 636±136 nm’ye düştüğünü göstermiştir. Çekme dayanımı, saf PU için 1.53±0.20 N mm⁻² iken, PU/HNT (%1) kompozit nanolifli yapıda anlamlı biçimde artarak 6.68 ± 0.21 N mm⁻²’ye ulaşmıştır. HNT ilavesi ayrıca yüzey ıslanabilirliğini artırmış, temas açısını saf PU’da 133°’den PU/HNT (%3) membranda 108°’ye düşürmüştür. Buna ek olarak, hava geçirgenliği saf PU’da 4.67 L m⁻² s⁻¹ iken, PU/HNT (%3) membranda 7.03 L m⁻² s⁻¹’ye yükselmiş ve buna su buharı taşınım özelliklerinde iyileşme eşlik etmiştir.

Keywords

• Poliüretan
• Halloysit
• Nanolifli membran
• Transport özellikleri
• Elektro-üflemeli çekim

HALLOYSITE NANOTUBE REINFORCED POLYURETHANE NANOFIBROUS MEMBRANE: EFFECTS ON STRUCTURAL, THERMAL, MECHANICAL AND TRANSPORT PROPERTIES

Abstract

Polyurethane (PU) nanofibrous membranes have attracted significant attention due to their high surface area, flexibility, and tunable surface properties, making them promising materials for filtration, protective textiles, and biomedical applications. However, neat PU nanofibers often suffer from limited mechanical strength and barrier performance. In this study, halloysite nanotube (HNT)-reinforced PU nanofibrous membranes were fabricated by electro-blown spinning to investigate the influence of HNT incorporation (1-5 wt%) on structural, thermal, mechanical, and transport properties. SEM analysis showed that fiber diameter decreased from 758 ± 266 nm in neat PU to 656 ± 147 nm and 636 ± 136 nm at 1 wt% and 3 wt% HNT. Tensile strength significantly improved from 1.53 ± 0.20 N mm⁻² for neat PU to 6.68 ± 0.21 N mm⁻² for the PU/HNT (1%) composite nanofibrous mat. The incorporation of HNT also enhanced surface wettability, reducing the contact angle from 133° for neat PU to 108° for the PU/HNT (3%) membrane. In addition, air permeability increased from 4.67 L m⁻² s⁻¹ for neat PU to 7.03 L m⁻² s⁻¹ for the PU/HNT (3%) membrane, accompanied by improved water vapor transport properties.

Keywords

• Polyurethane
• Halloysite
• Nanofibrous membrane
• Transport properties
• Electro-blown spinning

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