Reversible and irreversible effects of mild thermal treatment on the properties of wood used for making musical instruments: comparing mulberry to spruce

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41320%2F22%3AN0000129" target="_blank" >RIV/60460709:41320/22:N0000129 - isvavai.cz</a>

Result on the web

<a href="https://iforest.sisef.org/abstract/?id=ifor4074-015" target="_blank" >https://iforest.sisef.org/abstract/?id=ifor4074-015</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3832/ifor4074-015" target="_blank" >10.3832/ifor4074-015</a>

Result language

angličtina

Original language name

Reversible and irreversible effects of mild thermal treatment on the properties of wood used for making musical instruments: comparing mulberry to spruce

Original language description

Thermal treatments can be considered as an accelerated ageing, bringing partly similar changes in properties as naturally aged wood. Thermal treatment was applied on white mulberry (Morus alba L.), a dominant species for making musical instruments from middle-East to Far-East, to investigate the effects on the vibro-mechanical and physical properties of this wood, and the results compared to previously published data on spruce (Picea abies Karst.) as a reference for the soundboard of Western string instruments. Thermal treatment (TT) at 150 degrees C and 0% of relative humidity was applied to five anal ogous groups of specimens with five different durations (2,5, 8, 24, 72, 261 hours). Humidity re-conditioning of specimens was done to explore the reversibility of TT effects. Physical and vibrational properties such as specific gravity (gamma), equilibrium moisture content (EMC), CIELab colorimetric values, specific modulus of elasticity (E/gamma) and damping coefficient (tan delta) in longitudinal (L) and radial (R) directions, have been measured after stabilisation of samples in standard conditions (20 degrees C, 65% RH), before and after TT and then after re-conditioning. Untreated mulberry had a low EMC, very low LR anisotropy and low E(L)gamma, and relatively low tand. Weight loss (WL) and CIELab values evolved similarly during TT for mulberry and for previous results on spruce, however, their EMC and vibrational properties were affected differently. This could be explained in part by the low anisotropy of mulberry, and in part by its particular extractives. The parts of irreversible effects, linked to chemical modification or degradation, and of reversible effects, linked to physical configuration, were different between mulberry and spruce. The applied treatments did not bring permanent improvements in vibrational properties of mulberry, yet its colour appearance was enhanced.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

40102 - Forestry

Project

<a href="/en/project/EF16_019%2F0000803" target="_blank" >EF16_019/0000803: Advanced research supporting the forestry and wood-processing sector´s adaptation to global change and the 4th industrial revolution</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

IForest

ISSN

1971-7458

e-ISSN

—

Volume of the periodical

15

Issue of the periodical within the volume

2022

Country of publishing house

IT - ITALY

Number of pages

9

Pages from-to

256-264

UT code for WoS article

000930734900001

EID of the result in the Scopus database

2-s2.0-85136789675