Effect of Copper Sulfate Impregnation on the Physical-Mechanical Properties of Sengon and Coconut Wood

Pengaruh Impregnasi Tembaga Sulfat terhadap Sifat Fisis-Mekanis Kayu Sengon dan Kelapa

Authors

  • Irma Wahyuningtyas Forest Products Processing Study Program, Department of Environmental and Forestry, State Agricultural Polytechnic of Samarinda, Samarinda, Indonesia
  • Abdul Rasyid Zarta Wood Engineering Study Program, Department of Environmental and Forestry, State Agricultural Polytechnic of Samarinda, Samarinda, Indonesia
  • Teguh Rizali Zahroni Wood Engineering Study Program, Department of Environmental and Forestry, State Agricultural Polytechnic of Samarinda, Samarinda, Indonesia
  • Ratnawati Wood Engineering Study Program, Department of Environmental and Forestry, State Agricultural Polytechnic of Samarinda, Samarinda, Indonesia
  • Cici Anisa Wood Engineering Study Program, Department of Environmental and Forestry, State Agricultural Polytechnic of Samarinda, Samarinda, Indonesia
  • Muhammad Rafli Akbar Wood Engineering Study Program, Department of Environmental and Forestry, State Agricultural Polytechnic of Samarinda, Samarinda, Indonesia
  • Jane Secilia Widodo Wood Engineering Study Program, Department of Environmental and Forestry, State Agricultural Polytechnic of Samarinda, Samarinda, Indonesia
  • Janice Celsia Widodo Wood Engineering Study Program, Department of Environmental and Forestry, State Agricultural Polytechnic of Samarinda, Samarinda, Indonesia
  • Fatmawati Afandi Wood Engineering Study Program, Department of Environmental and Forestry, State Agricultural Polytechnic of Samarinda, Samarinda, Indonesia
  • Fransisco Carles Gelung Wood Engineering Study Program, Department of Environmental and Forestry, State Agricultural Polytechnic of Samarinda, Samarinda, Indonesia
  • Diana Kristin Wood Engineering Study Program, Department of Environmental and Forestry, State Agricultural Polytechnic of Samarinda, Samarinda, Indonesia
  • Brayen Daniel Rajaluhu Wood Engineering Study Program, Department of Environmental and Forestry, State Agricultural Polytechnic of Samarinda, Samarinda, Indonesia
  • Martinus Yan Wood Engineering Study Program, Department of Environmental and Forestry, State Agricultural Polytechnic of Samarinda, Samarinda, Indonesia

DOI:

https://doi.org/10.24259/perennial.v22i2.53690

Keywords:

Coconut Wood, Copper Sulfate, Impregnation, Physical-Mechanical Properties, Sengon Wood

Abstract

This study investigated the effect of copper sulfate (CuSO₄) impregnation on the physical and mechanical properties of sengon wood (Falcataria moluccana) and coconut wood (Cocos nucifera) for green building applications. Wood samples aged 7 years from Samarinda, East Kalimantan, were treated using a vacuum-pressure impregnation method. Physical properties were evaluated through weight percent gain (WPG) and density, while mechanical properties were assessed by modulus of elasticity (MOE) and modulus of rupture (MOR). CuSO₄ impregnation significantly increased WPG and density in both species, with coconut wood showing higher absorption in WPG (21.84%) than sengon wood (14.47%) due to its more porous structure. MOE decreased in both species after treatment, with a greater reduction in sengon wood due to its lower density. For MOR, sengon wood showed a slight decrease, whereas coconut wood demonstrated an increase from 587.42 to 663.96 kg/cm², attributed to the interaction between the impregnation solution and its denser fiber structure. CuSO₄ impregnation was more effective in enhancing the bending strength of coconut wood, though the stiffness reduction in both species should be considered for sustainable building material applications.

 

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Published

2026-10-31

Issue

Vol. 22 No. 2 (2026): Vol. 22 No. 2, October 2026

Section

Articles

How to Cite

Effect of Copper Sulfate Impregnation on the Physical-Mechanical Properties of Sengon and Coconut Wood: Pengaruh Impregnasi Tembaga Sulfat terhadap Sifat Fisis-Mekanis Kayu Sengon dan Kelapa. (2026). PERENNIAL, 22(2), 93-100. https://doi.org/10.24259/perennial.v22i2.53690