Rotaru Răzvan, Fortună Maria E, Ungureanu Elena, Brezuleanu Carmen O
"Petru Poni" Institute of Macromolecular Chemistry, Department of Inorganic Polymers, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania.
"Ion Ionescu de la Brad" Iasi University of Life Sciences, 3 Mihail Sadoveanu Alley, 700490 Iasi, Romania.
Polymers (Basel). 2024 Aug 21;16(16):2363. doi: 10.3390/polym16162363.
This paper investigates the effects of ultrasonication on cellulose microparticles in different conditions. FTIR (Fourier transformed infrared spectrometry) and XRD (X-ray diffraction) analyses were used to compare the changes in the cellulose microstructure caused by the following various ultrasonic treatment conditions: time, amplitude of generated ultrasound waves, output power converted into ultrasound, the liquid medium (water and isopropyl alcohol) used for ultrasonication, and the shape of the vessel used for sonication. The cumulative results lead to an increase in the crystalline region directly proportional to the condition of sonication. Also, the total crystallinity index varied from 1.39 (pristine cellulose) to 1.94 for sonication in alcohol to 0.56 for sonication in water. The crystallinity index varied from 67% (cellulose) to 77% for the sample with 15 min of sonication in isopropyl alcohol and 50.4% for the sample with 15 min of sonication in water.
本文研究了在不同条件下超声处理对纤维素微粒的影响。采用傅里叶变换红外光谱（FTIR）和X射线衍射（XRD）分析方法，比较了以下各种超声处理条件引起的纤维素微观结构变化：时间、产生的超声波振幅、转化为超声波的输出功率、用于超声处理的液体介质（水和异丙醇）以及用于超声处理的容器形状。累积结果表明，结晶区的增加与超声处理条件成正比。此外，总结晶度指数从1.39（原始纤维素）变化到在酒精中超声处理时的1.94，在水中超声处理时为0.56。在异丙醇中超声处理15分钟的样品，结晶度指数从67%（纤维素）变化到77%，在水中超声处理15分钟的样品为50.4%。
