Studies on Improvement in Durability of Oil Heat Treated 16-Year-Old Acacia mangium in Laboratory Tests | Chapter 7 | Cutting-edge Research in Agricultural Sciences Vol. 5

Via rapid laboratory tests, improvement in the longevity of oil heat treated Acacia mangium was studied. A. 16-year-old mangium logs were harvested and segregated into the lower, middle, and top sections. These were oil heat treated with oil palm oil as a heating medium in a stainless steel tank at temperatures of 180, 200 and 220 °C for 30, 60 and 90 minutes, respectively. The wood specimens were dried and ground into sawdust, then air-dried again until durability tests were performed. Accelerated laboratory longevity tests on treated A for 12 weeks. With mangium. Inoculated woodland fungi of Pycnoporus sanguineus, Gloeophyllum trabeum and Coriolus versicolors. Samples used as controls were untreated. The results showed that the durability of the timber improved as the temperature and length of the treatment increased. The heat treatment method of the oil reduced the G attack. Trabeum in control samples from 5.02 percent, 4.41 percent and 4.38 percent to 0.54-4.55 percent, 0.91-4.41 percent and 1.08-4.38 percent, respectively, in the bottom, middle and top parts. An attack by C. Versicolors decreased in the control samples from 11.48 percent, 14.27 percent and 15.68 percent to 1.87-10.19 percent, 3.10-12.69 and 4.78-15.10 percent in the lower, middle and top portions of the control samples. Nevertheless, with 31.42 percent, 18.24 percent and 10.53 percent in control samples, the attacked P. sanguineus is less successful at 3.71-10.18 percent, 5.74-14.59 percent and 4.37-17.08 percent at the bottom, middle and top sections. In vessels of untreated A, strong colonisation of mycelia takes place. Compared to the oil heat-treated wood found by the scanning electron microscope, mangium wood. The method of oil heat treatment improves the density of the A treated. With mangium. Densities grow from the bottom to the top of the tree. The longevity of A was improved by the oil-heat treatment. Timber mangium.

Author (s) Details

Razak Wahab
University College of Technology Sarawak, Malaysia.

Ros Syazmini Mohd Ghani
University College of Technology Sarawak, Malaysia and University of Hobart, Australia.

Mohamad Saiful Sulaiman
University College of Technology Sarawak, Malaysia.

Taharah Edin
University College of Technology Sarawak, Malaysia.

Nasihah Mokhtar
University College of Technology Sarawak, Malaysia.

Mohammad Haziq Razak
Universiti Sains Malaysia, Malaysia.

View Book :- https://bp.bookpi.org/index.php/bpi/catalog/book/362

Monitoring Changes in the Colour, Strength and Chemical Properties of Oil Heat Treated 18-Years Old Cultivated Acacia mangium | Chapter 5 | Recent Research Advances in Biology Vol. 4

 Acacia mangium is an important species of fast-grown timber for large-scale forest plantations in Malaysia. A research was conducted to examine changes in colour, strength and chemical properties of the 18-year-old cultivated Acacia mangium treated with oil heat. Oil heat treated in stainless tanks with palm crude oil as heating medium at temperatures of 180 ° C, 200 ° C and 220 ° C for 30, 60 and 90 minutes, respectively, were harvested trees divided into lower, middle and top portions containing heartwood and sapwood. Standards using the Minolta Chroma Meter, TAPPI Standard T204 om-88, TAPPI Standard T203 cm-99, TAPPI Standard T222 cm-02, and BS EN 310:1993 static bending tests were used to determine the changes in the wood. Using correlation analysis, the link between the changes in colour, mechanical and chemical composition was developed. The outcome showed that treatment with oil heat decreased the lightness of the wood and darkened the two sections of the wood. Following oil-heat treatment, the strength of the wood decreased significantly. The percentages of holocellulose, alpha-cellulose, hemicellulose and extractive content in chemical compositions decrease with increasing length and temperature of treatment. The method of oil heat treatment improved the colour of the sapwood to match the 18-year-old Acacia mangium heartwood. For A, the oil heat treatment process is recommended at 200 ° C for a period of 60 minutes. As it enhanced the colour of A, mangium wood. Mangium and the colour of sapwood and heartwood is standardised. As the treated wood only loses up to 15 percent strength in MOR and 10.7 percent in MOE, the loss of strength at this temperature and length is appropriate.

Author(s) Details

Razak Wahab
University College of Technology Sarawak, Malaysia.

Taharah Edin
University College of Technology Sarawak, Malaysia.

Nasihah Mokhtar
University College of Technology Sarawak, Malaysia.

Mohamad Saiful Sulaiman
University College of Technology Sarawak, Malaysia.

Ros Syazmini Mohd Ghani
University College of Technology Sarawak, Malaysia and University of Hobart, Australia.

Mohammad Haziq Razak
Universiti Sains Malaysia, Malaysia.

View Book :- https://bp.bookpi.org/index.php/bpi/catalog/book/353