Development of New Composite Products Based on Flax Fibres

Coatings

Daniela-Roxana Tămaş-Gavrea¹  Tünde-Orsolya Dénes¹  Raluca Iştoan¹  Horia Constantinescu¹  AncuţaElena Tiuc²  Ovidiu Vasile³ 

[1] Department of Civil Engineering and Management, Technical University of Cluj-Napoca, 400114 Cluj-Napoca, Romania;Department of Environmental Engineering and Sustainable Development Entrepreneurship, Technical University of Cluj-Napoca, 400641 Cluj-Napoca, Romania;Department of Mechanics, University Politehnica of Bucharest, 060042 Bucharest, Romania;

关键词: composite panels;    flax fibres;    perlite;    mechanical properties;    thermal properties;    acoustic properties;   

DOI  :  10.3390/coatings11050551

来源: DOAJ

【 摘 要 】

Plant fibres are materials that can increase energy savings, and they are being analysed for their reduced environmental impact. In this paper, three types of multi-layered panels were developed as environmentally friendly flax fibre-based products for building industry applications. The structural build-up of the panels is such that one layer of waste flax fibre was used as the core material in order to reduce the weight of the structure between two rigid perlite-based layers. The perlite was used in three varied grain sizes, resulting in three types of panels (S₁, S₂, S₃). The mechanical, thermal and acoustic properties were recorded for all specimens. The influence of the perlite particles’ size, perforation diameter and perforation percentage of the multi-layered panels on the acoustic absorption properties was analysed and discussed. Summarising the results, the multi-layered composite panel S₃ presented the best performance in regard to compressive strength and thermal conductivity, with S₂ presenting the best bending strength. From the acoustic point of view, for the unperforated panels, the highest values of the sound absorption coefficient were obtained at 500 Hz for S₁, α = 0.95, 315 Hz for S₂, α = 0.89 and 400 Hz for S₃, α = 0.84. The obtained values of the sound absorption coefficients were increased through the varied perforation diameters and percentages of the panels’ front face.

【 授权许可】

Unknown