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通过对醋酸钾/高岭石插层复合物的机械磨剥制备了不同径厚比的高岭石样品,并利用X射线粉晶衍射(XRD)、激光粒度仪、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和傅里叶变换红外光谱(FTIR)表征了4个样品的粒径、结构以及形貌。实验结果表明:随着插层磨剥次数的增加,高岭石的结晶度指数(HI)由原矿的1.29降至0.69,结晶度降低,晶体结构在一定程度上遭到破坏。同时,4个样品的粒径及厚度逐渐减少,径厚比依次增大至11.7。此外,经过3次插层磨剥洗涤后,部分剥离的片层发生卷曲,但很少完全卷曲成纳米卷。
The kaolinite samples with different diameters and thicknesses were prepared by mechanical grinding and peeling of potassium acetate / kaolinite intercalation composites. X-ray powder diffraction (XRD), laser particle size analyzer, scanning electron microscopy (SEM) Transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FTIR) were used to characterize the particle size, structure and morphology of four samples. The experimental results show that the crystallinity index of kaolinite decreases from 1.29 to 0.69 and the crystallinity decreases with the increase of the number of interfolding abrasion. The crystal structure is destroyed to a certain degree. At the same time, the particle size and thickness of four samples gradually decreased, and the diameter-thickness ratio increased to 11.7. In addition, partially delaminated sheets curled after three intercalation ablation washings, but seldom fully curled into nanorods.