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DIFFRACTOMETRIC METHOD FOR DETERMINING THE CRYSTALLINITY DEGREE OF CELLULOSE

Malkov, A.; Tyshkunova, I.; Vidrina, I.; Novozhilov, E.
Abstract:
Cellulose is one of the most important biopolymers and belongs to crystalline polymers. At the same time, it can exist in several crystalline modifications, giving a completely different diffraction pattern, or in an amorphous state. The crystallinity degree of cellulose significantly varies with different chemical and enzymatic treatments. A new method for crystallinity degree determining from X-ray diffraction data has been applied to cellulose samples. A calculation is based on estimating the rate of change in function I = f(2?) in the whole range of scattering angles. For cellulose samples a linear relationship between the specified ratio of crystalline and amorphous parts and the calculated crystallinity index is obtained. The crystallinity index for any cellulose crystal modifications can be determined by this method. The crystallinity degree of cellulose samples from different origin was calculated with respect to cotton cellulose and gold.
SGEM Research areas:
Year:
2018
Type of Publication:
In Proceedings
Keywords:
Crystallinity degree; X-ray diffractometry; polymers; bacterial cellulose
Volume:
18
SGEM Book title:
18th International Multidisciplinary Scientific GeoConference SGEM2018
Book number:
6.4
SGEM Series:
International Multidisciplinary Scientific GeoConference-SGEM
Pages:
119-126
Publisher address:
51 Alexander Malinov blvd, Sofia, 1712, Bulgaria
SGEM supporters:
Bulgarian Acad Sci; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci & Arts; Slovak Acad Sci; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; World Acad Sci; European Acad Sci, Arts & Letters; Ac
Period:
3 – 6 December, 2018
ISBN:
978-619-7408-71-3
ISSN:
1314-2704
Conference:
18th International Multidisciplinary Scientific GeoConference SGEM2018, 3 – 6 December, 2018
DOI:
10.5593/sgem2018V/6.4/S08.016
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