Colloid JournalColloid JournalКоллоидный журнал0023-29123034-543XThe Russian Academy of Sciences69745110.7868/S3034543X25050026ArticlesСтатьиResearch ArticleINFLUENCE OF MECHANICAL ACTIVATION ON THE STRUCTURE AND SORPTION PROPERTIES OF HYDROLYTIC LIGNIN, KAOLIN AND COMPOSITES BASED THEREONВЛИЯНИЕ МЕХАНИЧЕСКОЙ АКТИВАЦИИ НА СТРУКТУРУ И СОРБЦИОННЫЕ СВОЙСТВА ГИДРОЛИЗНОГО ЛИГНИНА, КАОЛИНА И КОМПОЗИТОВ НА ИХ ОСНОВЕDabizhaO. N.ДабижаО. Н.dabiga75@mail.ruBondarevichE. A.БондаревичЕ. А.email@example.comIvan'kovaE. M.ИваньковаЕ. М.email@example.comKhamovaT. V.ХамоваТ. В.email@example.comShilovaO. A.ШиловаО. А.email@example.comBranch of St. Petersburg Nuclear Physics Institute named after V. N. Konstantinov of National Research Centre "Kurchatov Institute" — Grebenshchikov Institute of Silicate ChemistryФилиал Петербургского института ядерной физики им. Б.П. Константинова НИЦ «Курчатовский институт» – Институт химии силикатов им. И.В. ГребенщиковаTransbaikal State UniversityЗабайкальский государственный университетChita State Academy of MedicineЧитинская государственная медицинская академияBranch of St. Petersburg Nuclear Physics Institute named after V. N. Konstantinov of National Research Centre "Kurchatov Institute" — Institute of Macromolecular CompoundsФилиал Петербургского института ядерной физики им. Б.П. Константинова НИЦ «Курчатовский институт» – Институт высокомолекулярных соединенийSt. Petersburg Electrotechnical University "LETI"Санкт-Петербургский электротехнический университет «ЛЭТИ»15092025875VOL 87, NO5 (2025)ТОМ 87, №5 (2025)48950502122025Copyright ©; 2025, Russian Academy of SciencesCopyright ©; 2025, Российская академия наук2025Russian Academy of SciencesРоссийская академия наукhttps://journals.eco-vector.com/0023-2912/article/view/697451

An express method of solvent-free mechanochemistry using fine grinding in air for 3 and 6 minutes in a mill (0.94 kW; 26,000 rpm) is employed to targetedly change in the structure of kaolin and increase its sorption capacity. During the same process, kaolin is modified together with hydrolytic lignin to hydrophobize its surface and improve its sorption properties. The influence of mechanical activation on the structure and properties of kaolin, hydrolytic lignin and their composites based with different component ratios is studied using electron microscopy, X-ray diffraction, infrared spectroscopy, low-temperature nitrogen adsorption and UV absorption spectroscopy. The dense structure of kaolinite remains preserved, hydrogen bonds in hydrolytic lignin are ruptured and the number of carbonyl groups increases, and fragments of natural polymer are grafted to kaolinite. It has been found that an aggregation-agglomeration microstructure is formed in the composites. Kaolin, as well as the composite of kaolin and hydrolytic lignin with a mass ratio of 10 : 1, treated with a mechanical energy dose of 0.83 kJ · g−1, exhibited significant changes in structure and demonstrated relatively high sorption characteristics. The Brunauer-Emmett-Teller specific surface area of this sorbents is ~ 16 m2 · g−1, the adsorption of bovine serum albumin are 83.63 and 44.10 mg · g−1, respectively. Thus, the dry mechanical activation in air under ‘mild’ conditions makes it possible to increase the sorption of bovine serum albumin of kaolin by 104%.

Для целенаправленного изменения структуры каолина и повышения его сорбционной емкости был использован экспресс-метод сухой механизации без растворителя путем тонкого измельчения на воздухе в течение 3 и 6 мин в мельнице (0.94 кВт; 26 000 об · мин−1). В том же процессе каолин был модифицирован гидролизным лигнином для гидрофобизации и улучшения его сорбционных свойств. Методами электронной микроскопии, рентгеновской дифракции, инфракрасной спектроскопии, низкотемпературной адсорбции азота, УФ-абсорбционной спектроскопии изучено влияние механической активации на структуру и свойства каолина, гидролизного лигнина и композитов на их основе с различными соотношениями компонентов. Плотная структура каолинита была сохранена, водородные связи в гидролизном лигнине были разрушены, количество карбонильных групп увеличилось, а фрагменты природного полимера были привиты к каолиниту. Было обнаружено, что в композитах образуется агрегационно-агломерационная микроструктура. Каолин, а также композит каолина и гидролизного лигнина с массовым соотношением 10 : 1, обработанные дозой механической энергии 0.83 кДж · г−1, продемонстрировали значительные изменения в структуре и достаточно высокие сорбционные характеристики. Удельная поверхность этих сорбентов по Брунауэру-Эмметту-Теллеру составила ~ 16 м2 · г−1, адсорбция бычьего сывороточного альбумина — 83.63 и 44.10 мг · г−1 соответственно. Таким образом, сухая механическая активация на воздухе в «мягких» условиях позволила увеличить сорбцию бычьего сывороточного альбумина каолином на 104%.

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