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Derginin Adı:
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International Journal Internauka
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Cilt:
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2016/8
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Sayı:
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8
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Makale Başlık:
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STUDY OF PHASE TRANSITIONS OF CELLULOSE NANOCRYSTALLITES
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Makale Alternatif Dilde Başlık:
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Alternatif dilde başlık bulunmamaktadır. There is no article title in another language.)
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Makale Eklenme Tarihi:
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5.10.2016
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Okunma Sayısı:
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1
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Makale Özeti:
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In this paper phase states and phase transitions of nanoscale cellulose crystallites have been studied. It was found that conditions of the phase transitions of rod-like nanocrystallites are depended on their lateral size (Lcr). Small nanocrystallites have instable phase state; as a result they have tendency to co-crystallization with forming of larger crystallites having a low specific surface. After treatment in boiling water small nanocrystallites of CIII easily recrystallize into crystallites of CI, whereas for CIII having large crystallites this phase transition cannot be implemented. It is also found that after heating in glycerol at 533 K three crystalline allomorphs, CI, CII and CIII,
can be transformed into CIV, when the lateral size of nanocrystallites Lcr ≤ 4.3 nm; whereas the larger crystallites of these allomorphs cannot be converted directly into CIV. Furthermore, small nanocrystallites of CI are more soluble, and their transformation into CII occurs at lower concentrations of mercerizing agents.
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Alternatif Dilde Özet:
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Alternatif dilde abstract bulunmamaktadır. (There is no abstract in another language.)
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