shahram Badamchi; Ahmad Jahan latibari; Mehran Rohnia; Seid Javad Sepideh dam
Abstract
In this research the effect of softwood cellulose fibers surface characteristics on mechanical properties of cellulose fibers / polypropylene composite (W.P.C) was studied. The fibers were refined to modify the surface characteristics and reach four different freeness levels (11, 14, 17 and 21 °SR). ...
Read More
In this research the effect of softwood cellulose fibers surface characteristics on mechanical properties of cellulose fibers / polypropylene composite (W.P.C) was studied. The fibers were refined to modify the surface characteristics and reach four different freeness levels (11, 14, 17 and 21 °SR). Then the fibers were mixed with polypropylene using pre-determined levels of 20% fibers and 77% polypropylene and 3% MAPP and samples were made. The results revealed that refining the fibers will change the strength of the composites. Statistical analysis should that the impact of the different freeness levels statistically influenced the strength at 99% confidence level. The highest strength levels were reached using fibers with the freeness level of 14 oSR.
Physics and Mechanical Wood
Ali Kazemi tabrizi; Amir Nourbakhsh; Javad Sepidehdam
Abstract
In this study, the effect of fish waste powder, base material polyethylene , and also the quantity of coupling agent (MAPE) on physical and mechanical properties of wood-plastic composite were studied. For this purpose, wood powder at 40% was mixed with 60% of HDPE. Fish waste in three levels (5, 10 ...
Read More
In this study, the effect of fish waste powder, base material polyethylene , and also the quantity of coupling agent (MAPE) on physical and mechanical properties of wood-plastic composite were studied. For this purpose, wood powder at 40% was mixed with 60% of HDPE. Fish waste in three levels (5, 10 and 15%) mixed into wood powder and coupling agent on three levels (0, 2 and 4) of HDPE in a blender at 180 °C and a speed rotating of 50 rpm, and samples were made with using of injection molding for standard tests. The mechanical properties: tensile and bending strength, bending and tensile modulus were investigated according of ASTM standards. This result suggests that increasing the amount of fish powder waste to 10%, increased bending strength while other strengths diminished. The amounts of all strengths were increased by increasing in percentage of coupling agent to 4%.The results shows that fish waste was suitable as a new material for wood plastics composites.
Sohil Amiri; Ahmad Jahan latibari; Seid Javad Sepidehdam
Abstract
Old corrugated container (OCC) recycling generates large volume of effluent which is heavily loaded with pollutants. Its treatment is very difficult and complicated due to the presence of various pollutants and certain chemical with complicated structure. In this study, the treatment of OCC recycling ...
Read More
Old corrugated container (OCC) recycling generates large volume of effluent which is heavily loaded with pollutants. Its treatment is very difficult and complicated due to the presence of various pollutants and certain chemical with complicated structure. In this study, the treatment of OCC recycling effluent using nano TiO2 was investigated and the treated effluent parameters such as COD, TDS, TSS, TS, EC and turbidity were measured. Nano TiO2 was applied at 0.5%, 1%, 1.5% of the effluent volume and the pH was adjusted at either 5, 9 or 7.3 (as received from mill). The results showed that the nano TiO2 and pH are effective on all of the parameters and the effect was statistically significant at 99%, but the effect of variables on EC was not measured statistically significant. The effect of pH on all of parameter was statistically significant at 99% expect on EC. Optimum condition was pH=9 and the dosage of nano TiO2= 0.5% and 1%. At this treatment condition, COD, TDS, TSS, TS and turbidity were reduced by 47.5, 38.7, 98, 70.4, and 97.7 % respectively
SeaidJavad Sepidehdam; Arash Sotudeh
Abstract
In this study, Cationic Pulp Fiber (CPF) was prepared using three levels of 0, 2, 4% (3-chloro-2-hydroxy propyl) trimethyl ammonium chloridein and three temperatures of 40, 60 and 80 °C. Then the CPF fibers were blended with virgin pulp fibers to make handsheets.The results showed that the effect ...
Read More
In this study, Cationic Pulp Fiber (CPF) was prepared using three levels of 0, 2, 4% (3-chloro-2-hydroxy propyl) trimethyl ammonium chloridein and three temperatures of 40, 60 and 80 °C. Then the CPF fibers were blended with virgin pulp fibers to make handsheets.The results showed that the effect of temperature, CHTMA and CHTMA*temperature interaction on cationizing the fibers was statistically significant. Maximum absorption of cationic CHTMA on pulp fibers with the average of 53.33%was obtained by application of 2% CHTMA at 60 °C temperature. The mixture of 70% long fibers , 30% short fibers, 1% cationized pulp fiber, 5% PCC and three levels of C-PAM (0, 0.05 and 0.1%) was used to prepare handsheets. Freeness of blended pulp and mechanical properties of produced paper such as tensile index, tear index and burst index was determined. Statistical analysis of results showed that the effect of applied treatments was statistically significant. The highest freeness and mechanical properties obtained in different conditions were as follow; freeness (669 mlCSF): CPF 1%, C-PAM 0.05%, PCC 5%; tensile index (15.25 N.m/g): CPF 1%, C-PAM 0.1%, PCC 5%; tear index (12.3 mN.m2/g): CPF 1%, C-PAM 0.1%, PCC 5%; burst index (0.68 kPa.m2/g): CPF 1%, C-PAM 0.05%, PCC 5%.
Sasan َAbangah; Ahmad Jahan Latibari; Seyad Javad Sepideh dam; Mehran Roohnia; Mohammad ali Hossein
Abstract
The influence of reinforcing fibers (old corrugated container fibers called OCC) and addition of foaming agents (Azodicarbinamide and sodium bicarbonate) on density, strength properties and dimensional stability of OCC fiber/polypropylene composite were investigated. Conten of reinforcing fibers constant ...
Read More
The influence of reinforcing fibers (old corrugated container fibers called OCC) and addition of foaming agents (Azodicarbinamide and sodium bicarbonate) on density, strength properties and dimensional stability of OCC fiber/polypropylene composite were investigated. Conten of reinforcing fibers constant at 20% and the content of either foaming agent varied as 3, 5 and 7%. Strength properties including MOR, MOE, maximum tensile strength and modulus as well as izod impact strength were measured. Water absorption after 2 and 24 hours soaking in distilled water at 23±2 ºC were measured. Foaming agent decomposition caused some chemical residues in composite and the diffusion and penetration of polymer into the fibers structure led to increase in the density from 839.2 kg/m3 for pure polypropylene to 919.2 - 947.9kg/m3 for the composite, MOR and MOE also increased by the addition of foaming agent and the reinforcing fiber. The effect of 5 or 7% sodium bicarbonate was statistically significant and it improved the properties of the composite. Similar results were obtained for tensile strength and the modulus. Reinforcing fibers and foaming agent caused higher impact strength of the composite. Water absorption of the composites was higher than pure polypropylene.
Alireza Asgari; Ahmad Jahan latibari; Seiad Javad Sepidedam
Abstract
The impact of Multi Wall Carbon Nano Tubes addition on mechanical properties, water absorption and thickness swelling of polypropylene/old corrugated container (OCC) fiber composites was investigated. Polypropylene/ OCC fiber composite was prepared using 30% OCC fiber, 67% polypropylene and 3% MAPP. ...
Read More
The impact of Multi Wall Carbon Nano Tubes addition on mechanical properties, water absorption and thickness swelling of polypropylene/old corrugated container (OCC) fiber composites was investigated. Polypropylene/ OCC fiber composite was prepared using 30% OCC fiber, 67% polypropylene and 3% MAPP. Three levels of multi wall carbon nano tubes (1, 2, 4% based on the weight of fiber/polypropylene/MAPP mixture) were added. Composite compound was prepared using a Haake mixer and the test samples were extruded. The results of strength measurement indicated that when 1 or 2% multi wall carbon nanotubes were added, Izod impact strength and flexural strength improved. Higher flexural modulus of elasticity was reached as either 2 or 4% multi wall carbon nano tubes was added. The performance of 4% multi wall carbon nano tubes on flexural modulus of elasticity was superior. Lower water absorption and thickness swelling levels were observed, as 1% multi wall carbon nano tubes was added.
Mysam Abdolali sarbandi; Vahid Safdari; Sayed javad Sepidedam; Esmaeil Ganjyan
Abstract
In this research, the properties of cement fiberboard produced using different contents of nano-silica and bleached bagasse fibers were evaluated. Different ratios of bagasse fibers, cement and nano-silica were blended using an electrical blender. The mixture was then poured into a mould (15x18x18 ...
Read More
In this research, the properties of cement fiberboard produced using different contents of nano-silica and bleached bagasse fibers were evaluated. Different ratios of bagasse fibers, cement and nano-silica were blended using an electrical blender. The mixture was then poured into a mould (15x18x18 cm dimension). The produced mould samples were matured for 14 days at room temperature and high moisture content (100%) and after maturing, the bending strength and physical properties of boards were measured. Results showed that both materials (naosilica and bagasse fibers) changed the bending and physical properties of the final boards. The bending strength of samples increased with the increase in nano-silica up to 1% and exceeding 1% decreased this property. It is because high content of silica (more than 1%) results in aggregate of nano-silica and cement and micro cracks occurred in samples. Also the increase in bagasse fiber up to 4% increased of bending strength of boards and more bagasse fibers decreased the bending strength. It is because high bagasse fibers cannot distribute in the cement matrix and fiber bundles reduced the bending strength. However, as the nano-silica and bagasse fibers content increase, the water and moisture absorption as well as thickness swelling increases, whereas density decreases.
Composite wood products
masoudreza habibi; Saeed Mahdavi; Hossein Hosseinkhani; Sayed javad Sepideh dam
Abstract
In this study, MDF was produced from Reed (Phragmites australis). Reeds are collected from Hor-Alazym area. The treatments conditions for fiber preparing were as following:- Steaming temperature 170, 180oC(Steaming pressure 7,9 bar).- Steaming time 5, 10, 15 minutes.The other production variables were ...
Read More
In this study, MDF was produced from Reed (Phragmites australis). Reeds are collected from Hor-Alazym area. The treatments conditions for fiber preparing were as following:- Steaming temperature 170, 180oC(Steaming pressure 7,9 bar).- Steaming time 5, 10, 15 minutes.The other production variables were constant.The anatomical properties of Reed such as Fiber length, fiber diameter, lumen cell diameter, and cell wall thickness were measured. LID ratio of Reed fiber was measured 73.69. The physical and mechanical properties of MDF were determined according to DIN standard. The measurements of bending properties and IB of MDF revealed that increasing steaming time and steaming temperature caused to decrease MOR, MOE, and IB.Also the results of MDF dimentional stabilities indicated that Thickness Swelling after 2 and 24 hours decreased upon increasing steaming time and steaming temperature. Degradation of hemicellulose chains may be the reason of decreasing Thickness Swelling.
Physics and anatomy
Abdolrahman Hosseinzadeh; Ahmad Jahan latibari; Hossein Familian; Saeed Mahdavi; Sayed javad Sepidehdam
Abstract
In this investigation, samples were collected from three tamarix species including: Tamarix meyeri from northern part and T. aphylla and T. strica from the southern parts of Iran. Nine dominat tamarix trees were felled, three for each species. From each tree 10 cm thick cross-sections at three different ...
Read More
In this investigation, samples were collected from three tamarix species including: Tamarix meyeri from northern part and T. aphylla and T. strica from the southern parts of Iran. Nine dominat tamarix trees were felled, three for each species. From each tree 10 cm thick cross-sections at three different heights (5, 25 and 50% of the tree height) were cut. These disks were used for anatomical study, and remaining logs were transferred to laboratory for physical and chemical tests. The results of this study revealed that wood from these three species of tamarix is considered unsuitable for pulping and in the case, It is used for pulping, the pulp yield will be low and the strength of the pulp will be quite low, which is the consequence of short and thick-walled fibers that will not provide adequate fiber bonding. In addition, because of the large diameter and thick-walled fibers, the strength properties of the woods are also low.
