Forestry Engineering Journal Forestry Engineering Journal Лесотехнический журнал 2222-7962 73965 10.34220/issn.2222-7962/2023.4/11 ДЕРЕВОПЕРЕРАБОТКА. ХИМИЧЕСКИЕ ТЕХНОЛОГИИ WOOD PROCESSING. CHEMICAL TECHNOLOGY ДЕРЕВОПЕРЕРАБОТКА. ХИМИЧЕСКИЕ ТЕХНОЛОГИИ Water absorption and swelling of Betula pendula ROTH wood modified with oligomers from by-products of polybutadiene production Водопоглощение и разбухание древесины Betula pendula ROTH, модифицированной олигомерами из побочных продуктов производства полибутадиена Никулина Надежда Сергеевна Nikulina Nadezhda Sergeevna Nikulin_sergey48@mail.ru

кандидат технических наук;

candidate of technical sciences;

 Дорняк Ольга Роальдовна Dornyak Olga Roal'dovna ordornyak@mail.ru

доктор технических наук;

doctor of technical sciences;

 Дмитренков Александр Иванович Dmitrenkov A. I. aurika44@mail.ru

кандидат технических наук;

candidate of technical sciences;

 Никулин Сергей Саввович Vostrikov Alexander Savvovich Nikulin_sergey48@mail.ru

доктор технических наук;адъюнкт архитектуры;

doctor of technical sciences;adjunct of architecture;

 Жужукин Константин Викторович Zhuzhukin K. V. kinkon18@yandex.ru

кандидат технических наук;

candidate of technical sciences;

 Черная Наталья Викторовна Chernaya Natalya V. chornaya@belstu.by

доктор технических наук;

doctor of technical sciences;

 Ивановская пожарно-спасательная академия ГПС МЧС России Россия Ивановская пожарно-спасательная академия ГПС МЧС России Russian Federation Воронежский государственный лесотехнический университет имени Г.Ф. Морозова Воронеж Россия Воронежский государственный лесотехнический университет имени Г.Ф. Морозова Voronezh Russian Federation Воронежский государственный лесотехнический университет имени Г.Ф. Морозова Voronezh State University of Forestry and Technologies named after G.F. Morozov ВУНЦ ВВС Военно-воздушная академия им. проф. Н.Е. Жуковского и Ю.А. Гагарина Воронеж Россия Military Research Center of the Air Force prof. NOT. Zhukovsky and Yu.A. Gagarina Voronezh Russian Federation Воронежский государственный лесотехнический университет имени Г.Ф. Морозова Воронеж Россия Воронежский государственный лесотехнический университет имени Г.Ф. Морозова Воронеж Russian Federation Белорусский государственный технологический университет Belarusian State Technological University 12 02 2024 12 02 2024 13 4 178 190 13 09 2023 28 11 2023 http://lestehjournal.ru/en/journal/2023/no-4-52-ch-1/water-absorption-and-swelling-betula-pendula-roth-wood-modified-oligomers

В настоящее время повышенным спросом пользуется натуральная древесина и изделия на её основе. Изучена технология пропитки древесины малоценных пород на примере березы повислой (Betula pendula ROTH) олигомерным материалом, полученным из отходов производства каучуков. Получали олигомеры с содержанием стирола 10 и 90 %. В первом случае низкомолекулярный сополимер имел молекулярную массу 1100-1300, а во втором – 1700-2000. Пропитку древесины B. pendula ROTH проводили в растворе полученного олигомера в толуоле. Для ускорения процесса высыхания защитного покрытия и повышения его прочности в пропиточный состав вводили сиккатива НФ-1 в количестве 4-5 %. Пропитку проводили при температуре 60 и 120 ˚С с последующей термообработкой при температуре 100 и 160 ˚С. С использованием теории планирования эксперимента создана регрессионная модель, позволившая описать влияния ряда технологических показателей на повышение водо- и влагостойкости модифицированной древесины. Проверка коэффициентов моделей на значимость проведена с помощью критерия Стьюдента. Регрессионные модели позволяют прогнозировать характеристики водостойкости древесины B. pendula ROTH, модифицированной за счет ее пропитки низкомолекулярным сополимером, содержащим стирол при заданных значениях технологических параметров - содержания стирола в пропитывающем составе, значений температуры пропитки и термообработки. Для повышения эффективности процесса пропитки и термообработки нужно придерживаться минимальных значений рассмотренных температурных интервалов, а содержание стирола в применяемом олигомерном продукте должно быть ~90 % мас. Модифицирующая обработка древесины олигомером из побочных продуктов производства полибутадиена позволяет улучшить её водостойкость. Использование предлагаемых пропиточных составов способствует утилизации отходов и побочных продуктов производства полибутадиена.

Currently, natural wood and products based on it are in high demand. The technology of impregnation of low-value wood species on the example of B. pendula ROTH with an oligomeric material obtained from rubber production waste has been studied. Oligomers with a styrene content of 10 and 90% were obtained. In the first case, the low molecular weight copolymer had a molecular weight of 1100-1300, and in the second - 1700-2000. Impregnation of B. pendula ROTH wood was carried out in a solution of the obtained oligomer in toluene. In order to speed up the drying process of the protective coating and increase its strength, NF-1 siccative was introduced into the impregnation composition in an amount of 4-5%. The impregnation was carried out at temperatures of 60 and 120 ˚C, followed by heat treatment at temperatures of 100 and 160 ˚C. In the work, using the theory of experimental planning, a regression model was created that made it possible to describe the effects of a number of technological indicators on increasing the water and moisture resistance of modified wood. Verification of the coefficients of the models for significance was carried out using the Student's criterion. The obtained regression models make it possible to predict the characteristics of water resistance of birch wood modified due to its impregnation with a low-molecular copolymer containing styrene at specified values of technological parameters - the styrene content in the impregnating composition, the values of the impregnation temperature and heat treatment. It is shown that in order to increase the efficiency of the impregnation and heat treatment process, it is necessary to adhere to the minimum values of the considered temperature intervals, and the styrene content in the applied oligomeric product should be ~ 90% by weight. Modifying treatment of wood with an oligomer from by-products of polybutadiene production makes it possible to improve its water resistance. The use of the proposed impregnating compounds contributes to the disposal of waste and by-products of polybutadiene production.

 олигомер древесина Betula pendula ROTH модификация регрессионная модель водопоглощение разбухание. oligomer wood Betula pendula ROTH modification regression model water absorption swelling

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