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Effect of thermal modification on chemical and physical properties of Iranian Beech (Fagus orientalis) and Velvet Maple (Acer Velutinum) | ||
| تحقیقات علوم چوب و کاغذ ایران | ||
| Article 71, Volume 33, Issue 1 - Serial Number 62, April 2018, Pages 142-154 PDF (521.63 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.22092/ijwpr.2018.116213.1445 | ||
| Authors | ||
| Foroogh Dastoorian* 1; Faezeh Farhadi2; Fahimeh Hoseinzadeh3; majid zabihzadeh4 | ||
| 1Assistant Professor, Sari Agricultural Sciences and Natural Resources University, Dep. Of Wood & Cellulosic Products Engineering, Sari, Mazandaran, Iran | ||
| 2M.Sc., Graduated, Sari agricultural Sciences and Natural Resources University, Dep. Of Wood & Cellulosic Products | ||
| 3Graduated, Sari agricultural Sciences and Natural Resources University, Dep. Of Wood & Cellulosic Products | ||
| 4Associate Professor, Sari Agricultural Sciences and Natural Resources University, Dep. Of Wood & Cellulosic Products Engineering | ||
| Abstract | ||
| The present study was done with the aim of investigation of the effect of heat treatment on chemical and physical properties of Iranian beech and Velvet maple. Results of spectroscopy showed that heat treatment led to decrease of hydroxyl groups which became more sensible with increasing temperature up to 175oC. Treatment at 190oC led to an increase of hydroxyl group comparing to the control ones. Increasing cellulose crystallinity, decreasing the hemicellulose content, increasing the lignin ratio, degradation of syringyl lignin and increase the condensation reaction of lignin was also obtained from spectroscopy. Results of water absorption tests also showed that heat treatment caused decreasing of water absorption. The water repellent and anti-swelling efficiency for both species showed that heat treatment at 160oC didn’t improve the water repellency and dimensional stability however treatment at 190oC led to decrease of water absorbance specially in beech. In total, the effect of heat treatment on anti-swelling efficiency in beech was more considerable comparing to acer, which can be explained by higher weight loss after heat treatment. | ||
| Keywords | ||
| heat treatment; water absorption; swelling; Fourier-transform infrared spectroscopy | ||
| References | ||
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