Keten elyaf takviyeli kompozit malzemelerin nem muhtevalarının incelenmesi

Abstract

Küresel iklim değişikliği fakındalığının tetiklemesiyle artan çevre duyarlılığı, her sektörde olduğu gibi kompozit malzeme sektöründe de karşılık bulmuş ve sektör temsilcilerini çevreci çözümler araştırmaya itmiştir. Karbon ayak izini düşürmek ve doğaya verilen zararı minimuma indirmek için konvansiyonel malzemeler olan sentetik elyafların yerine doğal elyaflar tercih edilmeye başlanması bu bağlamda atılmış bir adım olarak değerlendirilebilir. Otomobil iç parçalarının da dahil olduğu birçok endüstriyel üründe doğal elyaf uygulamaları görmek mümkündür.

Kompozit malzemelerde keten elyafın kullanılma amacı geleneksel elyaflarda olduğundan farklı değildir; ancak keten elyafların hidrofilik karakteristiği, bu elyafın kompozitlerini sıcaklığa ve çevrenin nemine duyarlı hale getirir. Bu çalışma, termogravimetrik analiz (TGA) kullanarak keten elyaf takviyeli kompozitlerin ve bu elyafların cam elyafla yaptığı hibrit kompozitlerin oda sıcaklığında sahip oldukları nem miktarını araştırmayı amaçlamaktadır. Keten elyaf numunelerin nem muhteviyatları %4.9 olarak bulunurken, bu değer cam elyaf numuneler için %0.5 olarak bulunmuştur. Hibrit numunelerin nem muhteviyatları bu iki değerin arasında %2.5 olarak bulunmuştur.

Keywords

• Keten elyaf
• Nem oranı
• Hibrit kompozitler
• TGA

Investigating the moisture content of flax fibre reinforced composite materials

Abstract

Increasing environmental consciousness, triggered by global climate change awareness, has found a response in the composite material industry and has pushed the industry representatives to search for environmentally friendly alternatives to conventional materials. To reduce the carbon footprint and minimize the damage to nature, the preference for natural fibres instead of synthetic fibres can be considered a step taken in this context. Today, it is possible to see natural fibre applications in many industrial products, including automobile interior parts.

The purpose of using flax fibre in composite materials is not different from conventional fibres, however, their hydrophilic characteristics make flax fibre composites sensitive to temperature and the humidity of the surroundings. This study aims to investigate the moisture content of flax fibre composites as well as their hybrids with E-glass fibres at room temperature by using thermogravimetric analysis (TGA). It is observed that flax fibre samples have a moisture content of 4.9%, while E-glass samples have only a moisture content of 0.5%. The hybrid samples lay between these two values having a moisture content of 2.5%.

Keywords

• Flax fibres
• Moisture content
• Hybrid composites
• TGA
• Keten elyaf
• Nem oranı
• Hibrit kompozitler

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