Amirkabir University of Technology Amirkabir Journal of Mechanical Engineering 2008-6032 54 8 2022 10 23 Experimental Study of Thermal and Mechanical Properties of Wood Boards Processed with Hard Recycled Skin of Walnut and Pistachio Experimental Study of Thermal and Mechanical Properties of Wood Boards Processed with Hard Recycled Skin of Walnut and Pistachio 1933 1944 4885 10.22060/mej.2022.20716.7302 FA Seyed Sharafoddin Hosseini Faculty of Engineering, Department of Mechanical Engineering, Payeme Noor University, Tehran, Iran 0000-0002-9956-4062 Ali Shahrjerdi Assistant Professor/ Malayer University Journal Article 2021 10 29 One of the main concerns of the environmental activists is felling the trees to produce wooden accessories. This action has a detrimental effect on the environment and the earth's climate, and efforts to find an alternative product seem essential. Due to the reduction of natural wood resources, along with the increase in demand for wood products, it is essential to produce recycled composites that replace wood. Since the skin structure of walnuts and pistachios can only be crushed and pulverized, they can be employed to prepare chipboard. In this experimental research, composite samples composed of the chipboard family were made using walnut and pistachio hardwood, and their physical properties were investigated. The obtained results revealed that the composites made are denser than ordinary chipboard. Despite the fact that such composites are slightly higher thermal conductivity, they have better fire resistance. The firing time for hard skin samples of walnut fruit and walnut/pistachio was 69% and 84% longer than ordinary chipboard. Due to the piece structure, the composites had a smoother cutting surface and showed a Crisp and fragile body behavior against bending. The electrical behavior of the composites was not significantly different from that of ordinary chipboard. One of the main concerns of the environmental activists is felling the trees to produce wooden accessories. This action has a detrimental effect on the environment and the earth's climate, and efforts to find an alternative product seem essential. Due to the reduction of natural wood resources, along with the increase in demand for wood products, it is essential to produce recycled composites that replace wood. Since the skin structure of walnuts and pistachios can only be crushed and pulverized, they can be employed to prepare chipboard. In this experimental research, composite samples composed of the chipboard family were made using walnut and pistachio hardwood, and their physical properties were investigated. The obtained results revealed that the composites made are denser than ordinary chipboard. Despite the fact that such composites are slightly higher thermal conductivity, they have better fire resistance. The firing time for hard skin samples of walnut fruit and walnut/pistachio was 69% and 84% longer than ordinary chipboard. Due to the piece structure, the composites had a smoother cutting surface and showed a Crisp and fragile body behavior against bending. The electrical behavior of the composites was not significantly different from that of ordinary chipboard. https://mej.aut.ac.ir/article_4885_6c35083f355f10ab32ebed269a58169e.pdf