Doğal lif takviyeli mantar esaslı sandviç kompozitlerin viskoelastik özellikleri

Öz

Doğal lif takviyeli kompozit malzemeler çevre dostu, ucuz ve sürdürülebilir malzemeler olması bakımından endüstride pek çok kullanım alanı bulmaktadır. Bu çalışmada jüt lifi takviyeli ve mantar esaslı sandviç kompozitler üretilerek viskoelastik özellikleri incelenmiştir. Bu amaçla öncelikle jüt lifi/polipropilen (PP) karışımı dokusuz yüzey (nonwoven) kumaşlar ve PP granül kullanılarak ince jüt/PP kompozit plakalar üretilmiştir. Üretilen bu plakalar bir adet mantar levhanın alt ve üst yüzeyine konumlandırılarak basınç altında birleştirilmiş ve sandviç yapılar oluşturulmuştur. Üretilen sandviç yapıların viskoelastik özelliklerini belirlemek amacıyla dinamik mekanik analiz (DMA) testi gerçekleştirilmiştir. Kompozit üretiminden önce liflere uygulanan sodyum hidroksit (NaOH) işleminin kompozit mekanik özelliklerini geliştirdiği gözlemlenmiştir. Üretilen sandviç kompozitlerin inşaat sektöründe yalıtım malzemesi olarak ve ofis alan ayırma panellerinde, aynı zamanda otomotiv endüstrisinde kullanımı amaçlanmaktadır.

Anahtar Kelimeler

• Jüt lifi,Mantar,Sandviç Kompozit,Dinamik mekanik analiz

Viscoelastic properties of natural fiber reinforced cork based sandwich composites

Abstract

Natural fiber reinforced composite materials have found many applications in various industries due to the fact that they are nature-friendly, low-cost and sustainable materials. In this study, jute fiber reinforced and cork based sandwich composites were produced and their viscoelastic properties were investigated. First, thin jute/polypropylene (PP) composite plates were produced by using jute/PP nonwoven fabrics and PP granules. Then these plates were placed on top and bottom faces of a cork plate and consolidated under pressure to produce sandwich composites. Dynamic mechanical analysis (DMA) was performed to determine the viscoelastic properties of the produced samples. It was found that sodium hydroxide (NaOH) treatment of fibers before composite preparation lead to higher mechanical properties of the composites. The produced sandwich composites can be used in construction industry as insulation materials and office partition panels as well as in automotive industry.

Keywords

• Jute fiber,Cork,Sandwich composite,Dynamic mechanical analysis

Kaynakça

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