Fibrillation of Aspen by Alkaline Cold Pre-treatment and Vibration Milling

Medžiagotyra

Urve KALLAVUS¹  Matti ELOMAA¹  Kärt KÄRNER² 

[1] ;Centre for Materials Research, Tallinn University of Technology, Estonia;

关键词: SEM, cellulose, fibrillation, alkaline cold treatment, nanocellulose, MFC, vibration milling;   

DOI  :  10.5755/j01.ms.22.3.7412

来源: DOAJ

【 摘 要 】

In this article an attempt to fibrillate aspen bleached chemi-thermo mechanical pulp (BCTMP) fibre in an environmentally friendly way is reported. The effects of various NaOH, KOH, urea and ethanol aqueous solutions at lowered temperature were tested for pre-treatment. The pre-treatment was followed by vibration milling aiming to peel off outer cell wall layers and to fibrillate S2 layer of the aspen wood fibre. The effects of the treatments were evaluated by scanning electron microscopy (SEM). The results show that it is possible to fibrillate BCTMP aspen fibres by using alkaline aqueous solutions at low temperatures followed by a mechanical treatment. A strong dependence on fibrillation of cellulose on temperature, time and alkali concentration was established.

DOI: http://dx.doi.org/10.5755/j01.ms.22.3.7412

【 授权许可】

Unknown