Lesnoy Vestnik / Forestry BulletinLesnoy Vestnik / Forestry BulletinЛесной вестник / Forestry Bulletin2542-1468Eco-Vector70632910.18698/2542-1468-2025-4-104-113Wood processing and chemical processing of woodДеревообработка и химическая переработка древесиныResearch ArticleWood-polymer composites based on polycondensation copolyimidesДревесно-полимерные композиты на основе поликонденсационных сополиимидовIvankinAndrey N.ИванкинАндрей Николаевич
Russian Federation

Dr. Sci. (Chem.), Professor

д-р хим. наук, академик МАН ВШ, профессор

aivankin@inbox.ruZarubinaAngella N.ЗарубинаАнжелла Николаевна
Russian Federation

Cand. Sci. (Tech.), Associate Professor, Head of the Department of Chemistry and Chemical Technologies of the Forest Complex

канд. техн. наук, доцент, зав. кафедрой химии и химических технологий лесного комплекса

zarubina@bmstu.ruKuleznevAleksey S.КулезневАлексей Сергеевич
Russian Federation

Student

магистрант

kuleznev00@bmstu.ruBMSTU (Mytishchi Branch)ФГАОУ ВО «Московский государственный технический университет имени Н.Э. Баумана (национальный исследовательский университет)» (Мытищинский филиал)150820252941041131704202617042026Copyright ©; 2025, Ivankin A.N., Zarubina A.N., Kuleznev A.S.Copyright ©; 2025, Иванкин А.Н., Зарубина А.Н., Кулезнев А.С.2025Ivankin A.N., Zarubina A.N., Kuleznev A.S.Иванкин А.Н., Зарубина А.Н., Кулезнев А.С.https://creativecommons.org/licenses/by/4.0https://journals.eco-vector.com/2542-1468/article/view/706329

The paper describes a methodology for obtaining heat-resistant organosoluble and hot-melt copolyimides for subsequent use as reinforcing binders in the technology of obtaining composite materials based on cellulosecontaining components of wood origin. It is shown that 3,6-diaminoacridine; 9,9-bis-(p-aminophenyl) fluorene, 2,2-bis-(3,4-dicarboxyphenyl)-1,1,1,3,3,3-hexafluoropropane dianhydride and 3,3’,4,4’-tetracarboxydiphenyl oxide dianhydride can be used as raw materials for obtaining copolyimides in composite materials. An optimal method for synthesizing copolyimides of various compositions with a molecular weight of 20…180 kDa is presented. It is shown that in order to obtain wood-polymer composites with satisfactory properties, it is advisable to add wood dust with particles of an average diameter of 0,5...1,1 mm to the matrix of the obtained copolyimides, followed by obtaining the target product in the form of films that can be formed by casting from a solution. The solubility of the obtained polymeric materials in tetrahydrofuran, cyclohexanone, chloroform, dichloroethane, tetrachloroethane, dimethylformamide, dimethylacetamide, dimethylsulfoxide, toluene, nitromethane and acetonitrile was determined. Physicomechanical tests showed that the magnitude of the tensile stress at break of the obtained films was in the range from 140 MPa for a film 0,2 mm thick to 210 MPa for a film 0,5 mm thick, and the relative elongation at break was 5...36 %. Thermomechanical tests showed a sufficiently high heat resistance of the obtained copolyimides and composites based on them. It was established that the working temperature range of the obtained products was maintained without any damage to the shape and internal structure of the material up to a temperature of 300…320 °C. The synthesized copolymers and composites based on them can be used as heat-resistant materials.

Описана методология получения термостойких органорастворимых и термоплавких сополиимидов для последующего использования в качестве укрепляющих связующих компонентов в технологии получения композиционных материалов на основе целлюлозосодержащих компонентов древесного происхождения. Показано, что в качестве сырья для получения сополиимидов в составе композиционных материалов возможно использование 3,6-диаминоакридина; 9,9-бис-(п-аминофенил)флуорена, диангидрида 2,2-бис-(3,4-дикарбоксифенил)-1,1,1,3,3,3-гексафторпропана и диангидрида 3,3',4,4'тетракарбокcидифенилоксида. Представлена оптимальная методика синтеза сополиимидов различного состава с молекулярной массой 20…180 кДа. Показано, что для получения древесно-полимерных композитов с удовлетворительными свойствами в матрицу полученных сополиимидов целесообразно вносить древесную пыль с частицами средним диаметром 0,5…1,1 мм с последующим получением целевого продукта в виде пленок, которые можно формировать методом полива из раствора. Определена растворимость полученных полимерных материалов в тетрагидрофуране, циклогексаноне, хлороформе, дихлорэтане, тетрахлорэтане, диметилформамиде, диметилацетамиде, диметилсульфоксиде, толуоле, нитрометане и ацетонитриле. Физико-механические испытания показали, что величина разрушающего напряжения при растяжении полученных пленок находилась в пределах от 140 МПа для пленки толщиной 0,2 мм до 210 МПа для пленки толщиной 0,5 мм, а относительное удлинение при разрыве составляло 5…36 %. Термомеханические испытания показали достаточно высокую термостойкость полученных сополиимидов и композитов на их основе. Установлено, что рабочий температурный интервал полученных продуктов без нарушений формы и внутренней структуры материала сохранялся до температуры 300…320 °С. Синтезированные сополимеры и композиты на их основе могут быть использованы в качестве термо-теплостойких материалов.

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