Papers by Keyword: Wood Fiber

Abstract: In order to optimize the size of wood fiber reinforced polymer, and extend the application field of wood fiber reinforced polymer composites and improve the safety of their use, four size of wood fiber reinforced high-density polyethylene (HDPE) composites were prepared by forming mat-compression molding. The four kinds of fibers of different size include 80-120 mesh, 40-80 mesh, 20-40 mesh and 10-20 mesh fibers. The flexural performance, impact resistance performance and 24 hours creep - 24 hours recovery of the composites are studied. Fiber of 20-40 mesh presents the best flexural and impact resistance performance. The flexural strength, the elastic modulus and the impact strength reach 26.71MPa, 2.73Gpa and 6.88 KJ/m² respectively. The impact performance of wood fiber/HDPE composites do not change a lot, while the fiber size increases from 10 to 80 mesh. However, the composites containing 80-120 mesh fibers has minimum impact performance. The creep performance of the wood fiber/HDPE composites with 80-120 mesh is the worst. After 24h creep test, the strain of the other three groups is almost the same. Creep recovery of the composites reinforced with 40-80 mesh fiber is the worst (61.74%). The creep recovery of the other three is above seven percent. Therefore, excessively large or small fiber size proves to be negative to improve the mechanical and creep performance, and polymer composites reinforced by them are not suitable for work under long-term load.

Abstract: The effect of phthalic anhydride (PAH) as a coupling agent on the tensile properties, swelling behavior, and x-ray diffraction of recycled high density polyethylene/wood fiber (rHDPE/WF) composites were studied. rHDPE/WF and rHDPE/WF_PAH composites were prepared using Brabender plasticorder at temperature of 160°C with rotor speed of 50 rpm. The results indicate that rHDPE/WF_PAH composites showed higher tensile strength and percentages of equilibrium water absorption, but lower interparticle spacing (d) compared to rHDPE/WF composites.

Abstract: The paper deals with the development options of particular insulation based on a blend of recycled cellulose fibers and natural (mainly) bast fibers. The paper presents the results of research work in the field of addiction thermal insulation, acoustic and mechanical properties of experimentally produced insulators on density..Keywords: Natural fibers, thermal conductivity, insulation materials, straw, fibreboard, cellulose fibers

Abstract: The effect of maleic anhydride as a coupling agent on the tensile properties and morphology of recycled high density polyethylene/wood fiber (rHDPE/WF) composites were studied. rHDPE/WF composites with different wood fiber loading and the addition of maleic anhydride were prepared with Brabender Plasticorder at temperature of 160°C and rotor speed of 50 rpm. The result indicated that rHDPE/WF_M composites with maleic anhydride exhibit higher tensile strength and modulus of elasticity than rHDPE/WF composites. rHDPE/WF_M with maleic anhydride composites gave a better interfacial adhesion between the matrix and the fiber than rHDPE/WF composites as evidence using Scanning electron microscopy (SEM).

Abstract: The effect of salicylic acid/ethanol as a coupling agent on the tensile properties and thermal stability of recycled high density polyethylene/wood fiber (rHDPE/WF) composites were studied. Both composites rHDPE/WF and rHDPE/WF_M (treatment with salicylic acid) were prepared using Brabender Plasticorder at temperature of 160°C and rotor speed of 50 rpm. The result indicated that rHDPE/WF_M composites with salicylic acid exhibit higher tensile strength and modulus of elasticity and lower elongation at break than rHDPE/WF composites. It was also found that the addition of salicylic acid/ethanol shows better thermal stability in rHDPE/WF_M composites than rHDPE/WF composites.

Abstract: The effect of salicylic acid as a coupling agent on the tensile properties, and morphology analysis of recycled high density polyethylene/wood fiber (rHDPE/WF) composites were studied. Both composites rHDPE/WF and rHDPE/WF_M (treatment with salicylic acid) were prepared using Brabender Plasticorder at temperature of 160°C and rotor speed of 50 rpm. The result indicated that rHDPE/WF_M composites with salicylic acid exhibit higher tensile strength and modulus of elasticity but lower elongation at break than rHDPE/WF composites. The SEM micrographs showed that the wood fiber was more widely dispersed in the rHDPE matrix with addition of ethyl salicylate than rHDPE/WF_M.

Abstract: The processing of PPC/wood fiber foam composites using moisture as blowing agent was studied in this manuscript. Three important factors, such as: moisture content, wood fiber content and extruder die temperature were investigated with orthogonal design. The relationship between each factor and foam density was revealed, as well as the foaming mechanism was obtained.

Abstract: ncorporations of synthetic fiber into wood polyvinyl chloride composites (WPVC) were investigated for the effect of co-reinforcing fillers on wear behavior of WPVC materials. Physical and mechanical properties of the composites were also analyzed and discussed in association with wear behavior of co-reinforced WPVC. Three different types of synthetic fibers, namely, E-glass fiber, S-glass fiber and Carbon fiber, having an average fiber length of 3 mm, were used to study the effect of type of synthetic fiber. The concentration of synthetic fiber was varied from 0-20 pph in the WPVC composites. Natural wood flour with an average particle size of less than 250 micron was introduced into the PVC compound at a fixed concentration of 40 pph to produce the WPVC composites. Various kinds of wood flour, including, Xylia Kerri Craib & Hutch (XK), Hevea Brasiliensis Linn (HB) and Mangifera Indica Linn (MI), were also studied for the influence of wood type. Wear behavior of the composites was employed by monitoring the specific wear rate at different sliding distances (2.0 and 4.0 km), using Taber wear tester. The results found that flexural properties of the composites were improved by addition of synthetic fibers. The carbon fiber-co reinforced WPVC composites showed the highest flexural properties. Among natural wood types used, the co-reinforced WPVC with HB exhibited the most improvement of flexural properties, particularly when higher loading of the synthetic fiber. It was observed that addition of synthetic fiber can enhance wear resistance of materials, the effect being more pronounced at the higher sliding distance (4 km). S-glass fiber-co reinforced WPVC with XK showed the best wear resistance property and the optimum concentration of S-glass fiber used was 10 pph.

Abstract: Wood-plastic composites were produced by heating, blending and extruding with recycled plastics and wood fiber as chief raw materials and some thermoplastic resin as the additive. The compounding formula and producing craft were researched and optimized. The influence of the ratio of wood fiber and additives was examined. Wood-plastics composites with excellent performance were produced.

Abstract: In this paper, the electromagnetic shielding function composite fiberboards were made by filling with stainless steel nets dipped with urea-formaldehyde resin adhesive (UF) and the influence of different mesh and layers of nets on its electromagnetic shielding performance, static bending strength (MOR), modulus of elasticity (MOE) and internal bonding strength (IB) were studied. The results showed that: when the mechanical strength was enough and the frequency was in range of 50MHz to 1GHz, of all the composite fiberboards filled with one-layer stainless steel net, the one filled with 60 mesh was best and the minimum shielding effectiveness (SE) was 36.22 dB; when filled with two-layers nets, the one filled with 80 mesh was best and the minimum SE was 42.54dB; when filled with three-layers nets, the one filled with 60 mesh was best and the minimum SE was 50.77dB.