Kenevir / Pamuk Elyaf Takviyeli Termoplastik Kompozitlerin Akustik Performansının Değerlendirilmesi

Öz

Gelişen ve her geçen gün çoğalan dünyamızda, doğal kaynakların tüketiminin hızla artması çevresel problemleri de beraberinde getirmektedir. Tüketim oranı yüksek olan inşaat endüstrisinde bitkisel hammaddelerin kullanımı büyük önem arz etmektedir. Sürdürülebilir ve çevre dostu malzemeler geliştirmek için artan talep, doğal liflerin sürdürülebilir yapı malzemelerinde (ses yutum, ısı/ses yalıtımı) kullanımını artırmıştır. Kenevir lifi üretiminde su tüketiminin düşük olması, gübre ve tarım ilacına ihtiyaç duymadan yetiştirilebilmesinin yanı sıra yabani otları yok ederek sonraki ürün için zengin bir toprak yapısı bırakması gibi nedenlerle toprak ve çevrenin korunmasını sağlamaktadır. Bu noktalardan yola çıkarak bu çalışmada, kenevir elyaf katkılı kompozit yapıların ses yalıtım özellikleri incelenmiştir. Matris malzemesi olarak polipropilen elyafı kullanılan çalışmada, kenevir elyafının performansını karşılaştırabilmek için pamuk elyafı da kullanılmış ve bu malzemelerden farklı ağırlık oranlarına sahip farklı konstrüksiyonlarda üretimler yapılmıştır. Kompozit malzeme, sıcak pres yöntemiyle elde edilmiştir. Elde edilen sonuçlara göre; kenevir elyafı takviyeli kompozitlerin, pamuk takviyeli kompozitlerden önemli ölçüde daha yüksek bir ses yalıtım özelliğine sahip olduğu ve yüksek frekanslarda ses yalıtım malzemesi olarak kullanılabileceği görülmüştür.

Anahtar Kelimeler

• Kenevir
• Kompozit
• Ses yutum
• Ses iletim kaybı

EVALUATION OF ACOUSTIC PERFORMANCE OF HEMP AND COTTON FIBER REINFORCED THERMOPLASTIC COMPOSITES

Öz

In a developing and increasing world, the increment in the consumption of natural resources brings environmental problems together. The use of plant raw materials has great importance in the construction industry, which has a high consumption rate. Increasing demand to develop sustainable and environmentally friendly materials has increased the use of natural fibers in sustainable building materials (sound absorption, heat and sound insulation). The fact that hemp fiber does not have high water consumption in the production, can be grown without the need for fertilizers and pesticides, as well as leaving a rich soil structure for the next crop by destroying weeds ensures the protection of the soil and the environment. From this point of view, in this study sound insulation properties of hemp fiber reinforced composites were investigated. Polypropylene fiber was used as a matrix material. To compare the performance of hemp fiber, cotton fiber was also utilized and different constructions were produced from these materials. The composites were produced by the hot-press method. It was found that the composites made of hemp fiber showed significantly higher sound insulation than the cotton fiber reinforced composites and can be used as a sound isolation material at specific high frequencies.

Anahtar Kelimeler

• Hemp
• Composite
• Sound absorption
• Sound transmission loss

Kaynakça

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