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Publikācija: Recycled Paper Additive for Wood-Polymer Composite: Preparation and Characterization

Publication Type Full-text conference paper published in conference proceedings indexed in SCOPUS or WOS database
Funding for basic activity Fundamental and applied research projects
Defending: ,
Publication language English (en)
Title in original language Recycled Paper Additive for Wood-Polymer Composite: Preparation and Characterization
Field of research 2. Engineering and technology
Sub-field of research 2.4 Chemical engineering
Research platform Materials, Processes, and Technologies
RTU scientific equipment used for research
  • Variable Pressure High Resolution Schottky Field Emission Scanning Electron Microscope
Authors Jevgeņijs Jaunslavietis
Jurijs Ozoliņš
Mārtiņš Kalniņš
Galia Shulga
Brigita Neiberte
Anrijs Verovkins
Keywords waste paper, cellulose, contact angle
Abstract 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.
DOI: 10.4028/www.scientific.net/KEM.850.81
Hyperlink: https://www.scientific.net/KEM.850.81 
Reference Jaunslavietis, J., Ozoliņš, J., Kalniņš, M., Shulga, G., Neiberte, B., Verovkins, A. Recycled Paper Additive for Wood-Polymer Composite: Preparation and Characterization. In: Materials Science and Applied Chemistry III: Selected Peer-Reviewed Papers from 60th International Scientific Conference of Riga Technical University (RTU) Section of Materials Science and Applied Chemistry (MSAC 2019). Key Engineering Materials. Vol.850, Latvia, Riga, 24-24 October, 2019. Switzerland: Trans Tech Publications Ltd, 2020, pp.81-86. ISBN 978-3-0357-1639-9. e-ISBN 978-3-0357-3639-7. ISSN 1013-9826. e-ISSN 1662-9795. Available from: doi:10.4028/www.scientific.net/KEM.850.81
Additional information Citation count:
  • Scopus  0
ID 31047