Publikace detail

Structure and properties of oxycelluloses before and after beating using X-ray diffraction

Autoři: Filipi Michaela | Milichovský Miloslav

Rok: 2015

Druh publikace: článek v odborném periodiku

Název zdroje: International Journal of Recent Scientific

Strana od-do: 5917-5921

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
cze	Struktura a vlastnosti oxycelulózy před a po mletí použitím X-ray difrakce	Práce se zabývá strukturou a změnou struktury celulózových materiálů před mletím a po mletí. Pro určení změny struktury oxycelulózy byla použita metody X ray difrakce.	oxycelulóza; lintry; mletí; X ray difrakce
eng	Structure and properties of oxycelluloses before and after beating using X-ray diffraction	Oxidized celluloses belong to a very interesting class of cellulose derivatives with unique chemical and mechanical influence on supermolecular structure of cellulose significantly different from those of unmodified cellulose. Oxidative-hydrolysis process taking place during oxycellulose preparation has a qualitative influence upon crystalline domains of cellulose. Primary cellulose I is changed during oxycellulose preparation to more amphoteric polymorph cellulose II being change further by beating to polymorphs II and IVII in the case of intensively oxidized cellulose (15 % and 19 % of COOH groups) and to polymorph IVI for carefully oxidation of bleached linters (3.5 % of COOH groups). In contrast to oxycellulose, intensively fibrillation beating of native cellulose leads only to increase of amount the crystalline domains in cellulose.	oxycellulose; linters; beating; X-ray diffraction

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