SORGUM (SORGHUM BICOLOR (L.) MOENCH) SAP ELYAFI İLE GÜÇLENDİRİLMİŞ YENİLEBİLİR KANNA (CANNA EDULIS KER) NİŞASTA BAZLI BİYOKOMPOZİTLERİN KARAKTERİZASYONU

Abstract

Bu çalışma, takviye maddesi olarak sorgum (Sorghum bicolor (L.) Moench) sapı lifinin (SF) eklenmesiyle matris malzemesi olarak yenilebilir kanna nişastasından (CS) oluşan biyokompozitleri araştırmaktadır. Sonuçlar, alkali ile muamele edilmiş SF konsantrasyonunun sistematik olarak ağırlıkça %0'dan %10'a yükseltilmesinin, biyokompozit filmlerin hem gerilme mukavemetini hem de Young modülünü önemli ölçüde arttırdığını ortaya koyuyor; bu da matris ve elyaflar arasındaki etkili stres iletimini gösteriyor. SF'nin alkali muamelesi, hemiselüloz, lignin ve balmumu ve yağlar gibi kirletici maddeleri uzaklaştırarak selüloz maruziyetini arttırdı ve hidroksil ve karboksil gruplarından dolayı hidrofilisitenin artmasına yol açtı. Bu arttırılmış hidrofiliklik, işlenmiş SF ve CS arasındaki uyumluluğu geliştirerek üstün su direnci kapasitesine sahip biyokompozit filmler elde edilmesini sağladı. Biyokompozitler, çoğunlukla kimyasal yapılarının uyumluluğuna ve benzerliğine atfedilen, lifler ve matris arasında güçlü moleküller arası hidrojen bağları sergiler. Genel olarak, elde edilen biyokompozit filmler olumlu mekanik, fiziksel ve suya dayanıklılık özellikleri sergiler. Sonuç olarak bu çalışma, sorgum lifi ile güçlendirilmiş yenilebilir kanna nişastasının ambalaj uygulamalarında kullanılma potansiyelinin altını çizmektedir. Gelecekteki çalışmalar, biyoambalaj malzemelerinin daha da geliştirilmesi çok önemli olduğundan, fiber yüklemelerinin biyokompozit filmlerin fiziksel ve mekanik özellikleri üzerindeki etkisini derinlemesine araştırabilir.

Keywords

• Biyokompozitler
• Canna edulis Ker
• Nişasta
• Sorgum
• Lif
• Alkali tedavisi

CHARACTERIZATION OF EDIBLE CANNA (CANNA EDULIS KER) STARCH-BASED BIOCOMPOSITES REINFORCED WITH SORGHUM (SORGHUM BICOLOR (L.) MOENCH) STALKS FIBER

Abstract

This study investigates biocomposites composed of edible canna starch (CS) as a matrix material with the addition of sorghum (Sorghum bicolor (L.) Moench) stalk fiber (SF) as a reinforcing agent. The results reveal that systematically increasing the concentration of alkali-treated SF from 0 to 10wt.% significantly enhanced both tensile strength and Young's modulus of the biocomposite films, indicating the effective stress transmission between the matrix and the fibers. Alkali treatment of SF enhanced cellulose exposure by removing hemicellulose, lignin, and contaminants, such as wax and oils, leading to increased hydrophilicity due to hydroxyl and carboxyl groups. This enhanced hydrophilicity improved the compatibility between the treated SF and CS, resulting in biocomposite films with superior water resistance capacity. The biocomposites exhibit robust intermolecular hydrogen bonds between the fibers and the matrix, mostly attributed to the compatibility and similarity of their chemical structure. Overall, the resulting biocomposite films exhibit favorable mechanical, physical, and water resistance properties. In conclusion, this study underscores the potential of utilizing edible canna starch reinforced with sorghum fiber in packaging applications. Future studies can deeply explore the impact of fiber loadings on the physical and mechanical properties of biocomposite films, as it is crucial to further develop biopackaging materials.

Keywords

• Biocomposites
• Canna edulis Ker
• Starch
• Sorghum
• Fiber
• Alkali treatment

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