Recycled Paper Additive for Wood-Polymer Composite: Preparation and Characterization
Key Engineering Materials 2020
Jevgeņijs Jaunslavietis, Jurijs Ozoliņš, Mārtiņš Kalniņš, Galia Shulga, Brigita Neiberte, Anrijs Verovkins

The recycling of paper and paperboard waste to obtain cellulose powder has a positive impact on environment and has economic benefits. Cellulose powder from recycled materials can be applied in various fields of industry, including the fabrication of wood-polymer composites [1, 2]. The extraction of cellulose from cellulose-containing waste can be carried out by mechanical disintegration and acid or alkali hydrolysis. In comparison to a known method [3], the proposed method can be uses gentler conditions. In this study, recycled de-inked waste paper was cut into small pieces (d < 5 mm). The paper pieces were soaked in 0.05 % HCl solution for 2 h under intensive mechanical stirring to insure disintegration. Hydromodulus was 1/20 (paper/water). The excess water after soaking was removed by pressing. Then the disintegrated paper mass was dried (first, at 60 °C for 16 h, followed by drying at 120 °C for 2 h). After drying, the paper mass was milled in a planetary mill for 15 min at a moderate rotation speed. The physicochemical properties of obtained cellulose particles were characterized. The obtained recycled paper particles (RPAP) had a similar contact angles with water compared to reference cellulose powder. However, the polarity of RPAP was 20.5 %, but that of reference cellulose – 43.5 %. RPAP is more amorphous than cellulose because its crystallinity index was 61 % but crystallinity index of reference cellulose powder was 81 %. Using laser particle sizing, it was found that 99% of particles were less than 200 μm in size, and 90 % of particles were less than 140 μm in size.

Atslēgas vārdi
waste paper, cellulose, contact angle

Jaunslavietis, J., Ozoliņš, J., Kalniņš, M., Shulga, G., Neiberte, B., Verovkins, A. Recycled Paper Additive for Wood-Polymer Composite: Preparation and Characterization. Key Engineering Materials, 2020, Vol. 850, 81.-86.lpp. ISSN 1013-9826. e-ISSN 1662-9795. Pieejams: doi:10.4028/

Publikācijas valoda
English (en)
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