Ramin Vaysi; Behrooz Malekian; Masih Masoudifar
Abstract
The aim of this study was accomplished on identification and comparison of chemical compounds in heart wood and bark of mulberry tree. For this purpose, the samples were chosen randomly from heart wood and bark of mulberry tree in Nowshahr's forest region. Then, flour and ash were provided from heart ...
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The aim of this study was accomplished on identification and comparison of chemical compounds in heart wood and bark of mulberry tree. For this purpose, the samples were chosen randomly from heart wood and bark of mulberry tree in Nowshahr's forest region. Then, flour and ash were provided from heart wood and bark of mulberry tree by TAPPI standards. For measured metallic ions, first the mineral compound of ash dissolved by 65% nitric acid and for its identified by atomic absorption method. The results showed that zinc ion in heart wood of mulberry tree was more than its bark, but manganese and iron ions were lower and its cupper ion was same. Then extractives were separated from wood flour by acetone and extractives residue transferred to glass vial and was added BSTFA reactive agent to it. After samples prepared, samples were injected to the GC/MS device for it analysis. Identification of compounds was done by retention time of each compound, calculation of Quats index and Adams table. The result of GC-MS showed that there are 30 compounds in bark of mulberry tree, that beta-Tocopherol(40.86%), bis (2-ethylhexyl)phthalate(11.2%), 9,12-Octadecadienoic acid(9.12%) and Triphenyl phosphine(9.82 were important components. 93 components identified heart wood of mulberry tree that resorcinol(79.47), methyl diphenyl methane(12.06%), p-xylene(0.06%) and gibberllin A3 (0.15%)di-limonene, as important components. These compounds can very important in durability and consumption its. Comparison of chromatograms showed that 1,2-benzenedicarboxylic acid was exists as a common components in heart wood and bark of mulberry tree.
Physics and anatomy
Babak Nosrati; mohamad haghpanah; masih masoudifar; alireza dorostkar
Abstract
In this research microscopic properties of wood near the pith to bark in Dalbergia sissoo was investigated. For this reason 3 stands of 10 years old Dalbergia sissoo trees from ShoshDanial area in Khozestan province were selected and cut. For measuring fiber biometrics of samples, from each trees one ...
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In this research microscopic properties of wood near the pith to bark in Dalbergia sissoo was investigated. For this reason 3 stands of 10 years old Dalbergia sissoo trees from ShoshDanial area in Khozestan province were selected and cut. For measuring fiber biometrics of samples, from each trees one disc and from each disc 10 pell in match's size segregated and tested. Segregation of fibers was done with Franklin method. Also microscopic segments of wood near the pith and bark were studied with light microscope. The results showed that the length, total and lumen diameter, and thickness of cell wall are significantly different and this values were increased from pith to bark. Ray widths and vessel diameters in wood near the pith and bark were 36.15, 132.98 and 31.82, 98.26 µm respectively and showed a significant difference in the level of 5%. The average number of vessels and the number of rays in wood near the pith and bark were 3.46, 7.20 and 3.54, 6.68 number respectively. Also ray length means in wood near the pith and bark were 130.86 and 132.05µm respectively and didn’t show a significant difference in the level of 5%.
Composite wood products
babak Nosrati; masih masoudifar; mohamad haghpanah
Abstract
Cordia (Sepestan in Persian) species (Cordia myxa L.) is in the borage family (Boraginaceae) and it is growing with geographical distribution in the moderate and tropical regions of Iran such as near the Persian Gulf, especiallyin Bandar Abbas and some places in Kerman and Sistan and Baluchestan region ...
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Cordia (Sepestan in Persian) species (Cordia myxa L.) is in the borage family (Boraginaceae) and it is growing with geographical distribution in the moderate and tropical regions of Iran such as near the Persian Gulf, especiallyin Bandar Abbas and some places in Kerman and Sistan and Baluchestan region but its anatomical characteristics have not been studied yet. In this study, some of the anatomical, chemical and physical properties of Sepestan wood in Iranshahr region in Sistan and Baluchestan Province were measured. Anatomical studies showed that this species has average diameter vessels, simple vascular perforation plate and intervessel pits alternate. Its ray xylems type is heterogeneous and contains abundant crystals. The wood tissue is parenchyma with abundant prismatic crystals and in the cross-section parenchyma was observed in gregarious and continuous formation. Average length, overall diameter, lumen diameter and wall thickness of the fibers were measured 1329, 33.5, 21.7 and 5.9 microns respectively. Also investigation of chemical characteristics showed that Sepestan wood has average cellulose 34.75, lignin 20.6, extractives soluble in acetone 7.88 and also 8.9 percent ash. The results also showed that the specific gravity of the wood is 0.4 and maximum volumetric swelling and shrinkage were 10.98 and 12.34 percent respectively.
Composite wood products
masih masoudifar; Babak Nosrati; Hamid reza Mansori; Rahim Mohebi gargari
Abstract
This study aimed to investigate the effect of chemical treatment of wood material on functional properties of wood flour / polypropylene hybrid composite. For this reason, first of all, mixed hardwood were separately treated by acetic acid, sodium hydroxide and hot water and were compared with control ...
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This study aimed to investigate the effect of chemical treatment of wood material on functional properties of wood flour / polypropylene hybrid composite. For this reason, first of all, mixed hardwood were separately treated by acetic acid, sodium hydroxide and hot water and were compared with control (untreated) samples. After chemical treatment, wood flour and polypropylene with weight ratio of 50 to 50 and 3 phc of compatibilizer combines in the internal mixer and at last the WPC composite were made using injection molding. Then mechanical tests included bending resistance, tension and impact and physical examination, including water absorption and thickness swelling after 2 and 24 hours was performed on specimens according to (ASTM) standard. Also to study the morphology of the composites, scanning electron microscopy (SEM) was used. The results of this study showed that by chemical treatment the mechanical strength increased and physical properties such as water absorption and thickness swelling decreased. So that the highest flexural strength, tensile and flexural modulus is related to alkali treatment and the highest tensile modulus and impact resistance is related to the acid treatment. Also the lowest water absorption and thickness swelling was related to the alkali treatment. In order to ensure chemical treatments, Fourier transform infrared (FTIR) and weight percent gain (WPG) was used on wood flour.
