Development of hemp hurd particleboards from formaldehyde-free resins
Laen...
Kuupäev
2020
Kättesaadav alates
Autorid
Alao, P.
Tobias, M.
Kallakas, H.
Poltimäe, T.
Kers, J.
Goljandin, D.
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Low density of hemp hurd (Cannabis Sativa L), better end of life impact, performance
comparable to wood chips and low energy requirement for cultivation make it a suitable
alternative raw material for particleboards (Pb). However, due to concerns about sustainability
and formaldehyde emissions, it is essential to develop the new bio-based resins from renewable
resources. In this research, the mechanical and physical properties of Pb produced from hemp
hurds (HH) and a variety of resins: Urea-formaldehyde (UF), formaldehyde-free acrylic resin
(Acrodur®) and bio-based soy resin (Soyad™) were compared to those of wood particles (WP)
bonded with UF. The results indicate that boards from HH are generally lighter than WP with a
5.6% variation between HH+UF and WP+UF. Hemp boards based on soy-resin showed higher
tensile performance, with an average of 0.43 MPa compared to the 0.28 MPa and 0.24 MPa of
(HH+UF) and (WP+UF) respectively. Nevertheless, thickness swelling (TS) of HH+UF (27%)
was the least, while there was no significant difference in the water absorption (WA) compared
to HH+Soyad4740, both were still lower than that of WP+UF. The overall outcome shows that
bio-based soy resin can be a suitable alternative to UF as a binder in Pb production.
Kirjeldus
Märksõnad
bio-resin, hemp hurd, mechanical properties, particleboard, urea-formaldehyde, articles