Mikrokristalin selüloz ve odun unu ilaveli Polihidroksibütirat (PHB) kompozitlerinin solvent yöntemiyle hazırlanması ve karakterizasyonu

Öz

Petrol türevli materyallerin doğada yok olma süreleri ve çevreye olan etkileri nedeniyle alternatif ürünlere yönelme ihtiyacı ortaya çıkmıştır.  Bu durum, biyopolimer materyallerin gelişmesine ivme kazandırmıştır. Doğada kolayca bozunan bu polimerlerin mekanik özelliklerinin düşük olması, destek materyalleri ile kullanımını yaygınlaştırmıştır. Bu çalışmada, biyopolimer olarak laboratuvar ortamında solvent casting yöntemi ile sentezlenen polihidroksibütirat (PHBs) ve ticari olarak satın alınan polihidroksibütirat (PHBt), farklı oranlarda oranında odun unu (OU) ve mikro kristalin selüloz (MKS) ile desteklenerek biyopolimer film tabakaları elde edilmiştir. Elde edilen biyopolimerler üzerinde (scanning electron microscope) SEM, (Thermogravimetric Analysis) TGA, (X-ray Diffraction) XRD, (Fourier transform infrared spectroscopy) FTIR analizleri gerçekleştirilmiştir. Çalışma sonuçlarına göre, PHBt örneklerinin termal dayanımlarının PHBs örneklerine oranla daha yüksek olduğu, MKS’lerin PHB içerisinde odun ununa oranla daha homojen dağımlar gösterdiği belirlenmiştir.

Anahtar Kelimeler

• Polihidroksibütirat,mikro kristalin selüloz,odun unu,kompozit,biyopolimer

Preparation and Characterization of Microcrystalline Cellulose and Wood Flour Added Polyhydroxybutyrate (PHB) Composites through Solvent Method

Öz

The need to turn to alternative crops has arisen due to the environmental extinction periods and environmental impacts of petroleum derived materials. This has accelerated the development of biopolymer materials. These polymers, which are easily degraded in the nature, have low mechanical properties and are widely used with support materials. In this study, biopolymer film layers were obtained from polyhydroxybutyrate, which was synthesized by solvent casting method (PHBs) and polyhydroxybutyrate which was supplied commercially (PHBt) have used as biopolymers. Polyhydroxybutyrates were supported different ratios with wood flour and microcrystalline cellulose. Scanning electron microscope (SEM), Thermogravimetric analysis (TGA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) analyzes were performed on the obtained biopolymers. According to the results of the study, the thermal resistances of PHBt samples are higher than those of PHBs and has been determined that microcrystalline celluloses show more homogeneous dispersions in PHB compared to wood flour.

Anahtar Kelimeler

• Polyhydroxybutyrate,microcrystalline cellulose,wood flour,composite,biopolymer

Kaynakça

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