Esterification of cellulose isolated from black poplar (Populus nigra L.) sawdust with octanoyl chloride

Year 2021, , 306 - 310, 30.09.2021

Samim Yaşar

https://doi.org/10.18182/tjf.948411

Cited By: 1

Abstract

In this study, cellulose was isolated from black poplar (Populus nigra L.) sawdust, which is produced by forest industrial processes in large amounts as lignocellulosic waste. Isolated cellulose was then esterified with different concentrations of octanoyl chloride (36–162 mmol, 2–9 equivalent per anhydroglucose unit in cellulose), and the obtained derivatives were characterized in terms of elemental analysis, percent yield, degree of substitution (DS), and solubility. DS values of cellulose derivatives ranged from 1.13 to 2.71, while percent yields varied between 56.36% and 93.23%. Solubility analysis revealed that esterification improved the hydrophobic capacity of cellulose. The findings of the study showed that the produced cellulose derivatives might be appropriate for the production of biodegradable and environmentally degradable plastics, resins, films, and coatings for use in some industrial areas such as in the food and pharmaceutical industries.

Keywords

Cellulose, Esterification, Elemental analysis, Degree of substitution, Percent yield, Solubility

Karakavak (Populus nigra L.) talaşından izole edilen selülozun oktanoil klorür ile esterlenmesi

Abstract

Bu çalışmada, orman endüstrisi proseslerinde büyük miktarlarda lignoselülozik atık olarak ortaya çıkan karakavak (Populus nigra L.) talaşından selüloz izole edilmiştir. İzole edilen selüloz daha sonra farklı konsantrasyonlardaki oktanoil klorür (36-162 mmol, selülozdaki anhidroglukoz birimi başına 2-9 ekivalent) ile esterlenmiş ve elde edilen türevler elementel analiz, yüzde verim, sübstitüsyon derecesi (DS) ve çözünürlük ile karakterize edilmiştir. Selüloz türevlerinin DS değerleri 1.13 ile 2.71 arasında değişirken, verim yüzdelerinin %56.36 ile %93.23 arasında olduğu görülmüştür. Çözünürlük analizi sonucu, esterleme ile selülozun hidrofobik kapasitesinde gelişme olduğu görülmüştür. Çalışma sonuçları, elde edilen selüloz türevlerinin, gıda ve ilaç endüstrileri gibi bazı alanlarda kullanılabilecek biyolojik olarak parçalanabilir ve çevreye karışabilir plastik, reçine, film ve kaplamaların üretimi için uygun olabileceğini göstermiştir.

Keywords

Selüloz, Esterlenme, Elementel analiz, Sübstitüsyon derecesi, Yüzde verim, Çözünürlük

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