Effect of ultrasound pretreatment on wood prior to vacuum drying

The influence of ultrasonic pretreatment prior to vacuum drying of Chinese fir specimens was examined in this work. In the pretreatments, wood samples were immerged in a distilled water bath and were treated using two wave frequencies for four different elapsed times to investigate effects of ultras...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	He,Zhengbin, Zhao,Zijian, Yang,Fei, Yi,Songlin
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2014
Materias:	Drying time ultrasound effective water diffusivity wood vacuum drying
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2014000400002
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0718-221X2014000400002
record_format	dspace
spelling	oai:scielo:S0718-221X20140004000022014-10-10Effect of ultrasound pretreatment on wood prior to vacuum dryingHe,ZhengbinZhao,ZijianYang,FeiYi,Songlin Drying time ultrasound effective water diffusivity wood vacuum drying The influence of ultrasonic pretreatment prior to vacuum drying of Chinese fir specimens was examined in this work. In the pretreatments, wood samples were immerged in a distilled water bath and were treated using two wave frequencies for four different elapsed times to investigate effects of ultrasonic frequency and treatment duration. Then the wood samples were vacuum-dried at 80°C and absolute pressure of 0,05 MPa. After the pretreatment, microscopic analysis was carried out on the wood samples to check micro-cracks, the loss of extractives from the cell walls and other micro-structural changes on the wood. Results show that the ultrasonic treatment prior to vacuum drying significantly shortened the wood drying time. The drying time decreased with increase in the wave frequency and the treatment time. Furthermore, ultrasound pretreatment tended to reduce the content of extractives in the wood cell walls and cause cell-wall micro- cracking.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.16 n.4 20142014-10-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2014000400002en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Drying time ultrasound effective water diffusivity wood vacuum drying
spellingShingle	Drying time ultrasound effective water diffusivity wood vacuum drying He,Zhengbin Zhao,Zijian Yang,Fei Yi,Songlin Effect of ultrasound pretreatment on wood prior to vacuum drying
description	The influence of ultrasonic pretreatment prior to vacuum drying of Chinese fir specimens was examined in this work. In the pretreatments, wood samples were immerged in a distilled water bath and were treated using two wave frequencies for four different elapsed times to investigate effects of ultrasonic frequency and treatment duration. Then the wood samples were vacuum-dried at 80°C and absolute pressure of 0,05 MPa. After the pretreatment, microscopic analysis was carried out on the wood samples to check micro-cracks, the loss of extractives from the cell walls and other micro-structural changes on the wood. Results show that the ultrasonic treatment prior to vacuum drying significantly shortened the wood drying time. The drying time decreased with increase in the wave frequency and the treatment time. Furthermore, ultrasound pretreatment tended to reduce the content of extractives in the wood cell walls and cause cell-wall micro- cracking.
author	He,Zhengbin Zhao,Zijian Yang,Fei Yi,Songlin
author_facet	He,Zhengbin Zhao,Zijian Yang,Fei Yi,Songlin
author_sort	He,Zhengbin
title	Effect of ultrasound pretreatment on wood prior to vacuum drying
title_short	Effect of ultrasound pretreatment on wood prior to vacuum drying
title_full	Effect of ultrasound pretreatment on wood prior to vacuum drying
title_fullStr	Effect of ultrasound pretreatment on wood prior to vacuum drying
title_full_unstemmed	Effect of ultrasound pretreatment on wood prior to vacuum drying
title_sort	effect of ultrasound pretreatment on wood prior to vacuum drying
publisher	Universidad del Bío-Bío
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2014000400002
work_keys_str_mv	AT hezhengbin effectofultrasoundpretreatmentonwoodpriortovacuumdrying AT zhaozijian effectofultrasoundpretreatmentonwoodpriortovacuumdrying AT yangfei effectofultrasoundpretreatmentonwoodpriortovacuumdrying AT yisonglin effectofultrasoundpretreatmentonwoodpriortovacuumdrying
_version_	1714202582860169216

Effect of ultrasound pretreatment on wood prior to vacuum drying

Ejemplares similares