The process of peroxide delignification of aspen wood in the medium “formic acid - water” for nanofibrillated cellulose obtaining | Vestnik Tomskogo gosudarstvennogo universiteta. Chimia – Tomsk State University Journal of Chemistry. 2021. № 23. DOI: 10.17223/24135542/23/4

The process of peroxide delignification of aspen wood in the medium “formic acid - water” for nanofibrillated cellulose obtaining

The influence of various catalysts (TiO₂, H₂SO₄, MnSO₄, C₂H₂O₄, (NH₄) ₆Mo₇O₂₄) on the yield and composition of celluloses obtained by peroxide delignification in the medium "formic acid - water" of aspen wood, from which hemicelluloses were removed by water-alkaline extraction, was investigated. It was found that at a process temperature of 90 °C all catalysts have high delignification ability. The content of residual lignin in the celluloses varies from 0.6 to 2.8 wt. %. By controlled hydrolysis with sulfuric acid and sonication treatment of cellulose with a low residual lignin content (0.6 wt.%), Nanofibrillated cellulose with an average hydrodynamic particle diameter of 29.2 nm was obtained. According to AFM data, the surface of the nano-fibrillated cellulose film is formed by particles with a diameter about 63 nm and does not contain external inclusions.

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Keywords

aspen wood, peroxide delignification, formic acid, catalysts, nano-fibrillated cellulose

Authors

Name	Organization	E-mail
Garyntseva Natalya V.	Krasnoyarsk Scientific Center SB RAS	garyntseva@icct.ru
Vorob’yev Sergey A.	Krasnoyarsk Scientific Center SB RAS	yekspatz@yandex.ru
Karacharov Anton A.	Krasnoyarsk Scientific Center SB RAS	karacharov@icct.ru

Всего: 3

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