Chemi-mechanical pulp from rapeseed straw

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F16%3A39901674" target="_blank" >RIV/00216275:25310/16:39901674 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Chemi-mechanical pulp from rapeseed straw

Original language description

This study deals with chemi-mechanical pulping of rapeseed straw (species Brassica napus L. convar. napus). Three cold chemi-mechanical processes, namely neutral sulphite, alkaline sulphite, and caustic soda, were applied under laboratory conditions. The chemi-mechanical pulping comprises four main operations, viz. chipping, grinding, leaching, and beating. The influence of varying charges of chemicals on the total yield, strength properties such as bending stiffness, bending modulus of elasticity, curvature in the region of elastic and plastic deformation, as well as the tensile index of pulp hand sheets was determined. The results obtained revealed that the cold caustic soda pulping has greater effect on the bending stiffness and bending modulus of chemi-mechanical pulps in comparison with neutral sulphite and alkaline sulphite pulping, although the total pulp yield for caustic soda pulping was lower than that for neutral sulphite and alkaline sulphite pulping. For all three cold processes, the bending stiffness, as well as the bending modulus of elasticity in the region of elastic deformation increased with increasing the chemical charge. However, the tensile index of chemi-mechanical pulps was found to be significantly lower in comparison with kraft softwood pulp and pulp from waste paper. The chemi-mechanical pulp was characterized by its degree of polymerization which was measured in the range of 75 to 110 with respect to relatively great amount of low molecular substances presented in pulps prepared by the cold pulping process.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JJ - Other materials

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Cellulose Chemistry and Technology

ISSN

0576-9787

e-ISSN

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Volume of the periodical

50

Issue of the periodical within the volume

3-4

Country of publishing house

RO - ROMANIA

Number of pages

8

Pages from-to

489-496

UT code for WoS article

000381325100021

EID of the result in the Scopus database

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