SELÜLOZUN KRİSTAL YAPISI

Selüloz bitkisel hücre bünyesinde birlikte bulunduğu diğer bileşenlerden (hemiselüloz ve lignin) uzun zincir molekülüne ve kristal yapıya sahip olmasıyla belirgin bir şekilde ayrılmaktadır. Selülozun sahip olduğu kristal yapı özellikleri elde edildiği orijine bağlı olmakla birlikte, liflerin fiziksel, mekaniksel ve kimyasal özellikleri üzerinde belirleyici bir role sahiptir. Selülozun kristal yapısı sadece orijinine bağlı olarak değil izole edilmesinde kullanılan kimyasal işlemlere de bağlı olarak değişebilmektedir. Selülozun kristal yapısı onu hammadde olarak kullanan bir çok endüstri kolu için önemli bir özelliktir. Bu çalışmada selülozun kristal yapısı ayrıntılı olarak ele alınmış ve bu konu üzerine yapılan çalışmalar ortaya konulmuştur.

Anahtar Kelimeler:

Selüloz, kristal yapı, X-ışını, kristalit, kağıt hamuru

CRYSTALLINE STRUCTURE OF CELLULOSE

Cellulose has long–chain glucose molecules and crystalline structure. Cellulose differ from hemicellulose and lignin located in plants cell wall because of these properties. Crystalline structure of cellulose depends on biological origin. Crystalline structure of cellulose has important role on physical, mechanical and chemical properties of cellulose fibres. Crystalline structure can be changed by chemical treatments in methods of cellulose isolation in plants. In this study, crystalline structure of cellulose was investigated. Studies on this subject so far were examined.

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