Тип публикации: статья из журнала
Год издания: 2023
Идентификатор DOI: 10.3390/polym15040904
Ключевые слова: spruce wood, microcrystalline cellulose, sulfuric acid hydrolysis, ultrasonic treatment, microfibrillated cellulose
Аннотация: A new approach is being considered for obtaining microfibrillated cellulose with a low degree of polymerization by sulfuric acid hydrolysis with simultaneous ultrasonic treatment under mild conditions (temperature 25 °C, 80% power control). Samples of initial cellulose, MCC, and MFC were characterized by FTIR, XRF, SEM, DLS, and TGПоказать полностьюA. It was found that a high yield of MFC (86.4 wt.%) and a low SP (94) are observed during hydrolysis with ultrasonic treatment for 90 min. It was shown that the resulting microfibrillated cellulose retains the structure of cellulose I and has an IC of 0.74. It was found that MFC particles are a network of fibrils with an average size of 91.2 nm. ζ-potential of an aqueous suspension of MFC equal to −23.3 mV indicates its high stability. It is noted that MFC has high thermal stability, the maximum decomposition temperature is 333.9 °C. Simultaneous hydrolysis process with ultrasonic treatment to isolate MFC from cellulose obtained by oxidative delignification of spruce wood allows to reduce the number of stages, reduce energy costs, and expand the scope.
Журнал: Polymers
Выпуск журнала: Т.15, №4
Номера страниц: 904
ISSN журнала: 20734360
Место издания: Basel
Издатель: MDPI