RESEARCH OF THE CHEMICAL AND STRUCTURAL PROPERTIES OF NATURAL SEA OAK BY SCANNING MICROSCOPY

UDC 674.048

  • Leonovich Oleg Konstantinovich – PhD (Engineering), Assistant Professor, the Department of Woodworking Technology. State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: OKL2001@mail.ru

  • Dupanov Sergey Aleksandrovich – Master's degree student, the Department of Woodworking Technology. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: serge.zubr@yandex.by

DOI: https://doi.org/10.52065/2519-402X-2021-240-20-150-155

Key words: wood, stained oak, microscopy, structure, composition.

For citation: Leonovich O. K., Dupanov S. A. Research of the chemical and structural properties of natural sea oak using scanning microscopy. Proceeding of BSTU, issue 1, Foresty. Nature Management. Processing of Resources, 2021, no. 1 (240), pp. 150–155 (In Russian). DOI: https://doi.org/10.52065/2519-402X-2021-240-20-150-155.

Abstract

The article provides a chemical and structural analysis of bog oak samples of a valuable natural resource of different periods in the floodplains of the coolant river. As a result of studies, an increase in the content of chemical compounds of iron and calcium and a decrease in the carbon content in the structure of natural bog oak were established depending on the occurrence periods: 1000, 1500, 2000, 3000, 4000, 5000 years. The absolute age of the samples was determined by the radiocarbon method by counting the ß activity of 14С in benzene synthesized from a carbon-containing sample. The change in the mineral composition (natural bog oak) depends on the mineral composition of the occurrence medium and the cyclic movement of the groundwater level with its chemical composition. When lying in the ground, bog oak wood will also be in the cyclic influence of groundwater with its chemical composition. Depending on the period of stay in a particular environment, the mineral composition of bog oak will increase the percentage of iron and calcium compounds compared to natural oak wood. With an increase in the period of occurrence, significant structural changes in the microscopic structure of wood occur. Large vessels of the early zone and small vessels of the late zone have a flattened shape. The medullary rays are sinuous. The microscopic structure of the bog oak structure has become more distorted and dense. The walls of the vessels were thickened, and the small vessels were practically filled with minerals accumulated during a thousand-year occurrence in the floodplains of rivers and the chemical interaction of the tannins of oak wood with salts of iron, calcium and other compounds.

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