Cellulose electron diffraction investigations

At the present moment it is difficult to decide which of the two hypotheses concerning the structure of cellulose is correct the idea of an amorpho-crystalline structure, or that postulating solely an amorphous texture. Nikitin assumes that the first hypothesis is the more probable, more especially as it is well in line with the most recent work of Zaydes and Sinitskaya [45] who conclude on the basis of electron diffraction investigations that in the natural cellulose fibre of Chinese nettle, there exist phases having a distinct microcrystalline structure. This suggests that structures shown in Figs. 78, 79 and 80 are the most probable. 

Carbonization of cellulose by controlled heating up to 1500° has been investigated as a method for manufacturing a totally impermeable carbon. In this study, samples of cellulose were heated in sealed tubes at slowly rising temperatures (20° per day), and the weight loss, infrared absorption, x-ray diffraction, electron-spin... 

The objective of this work was to use rice straw pulp cellulose fiber to prepare environmental-friendly rice straw fibril and fibril aggregates (RSF) and evaluate the fibril and fibril aggregates as a novel reinforcing material to compound polypropylene (PP)/ RSF nanocomposite. The scanning electron microscopy (SEM), wide angle X-ray diffraction (WAXD), laser diameter instrument (LDl) were used to evaluate the characteristics of RSF. The RSF/PP nanocomposite was prepared by novel extrusion process. The interface compatibility and tensile properties of nanocomposite were investigated by FTIR and tensile test, respectively. 

Bamboo cellulose crystals (BCCs) were also found to be able to reinforce starch composites (Liu et al. 2010), in particular, glycerol plasticized starch. The BCCs were obtained by HNO3-KCIO3 treatment and sulfuric acid hydrolysis, and the stracture and morphology were revealed by X-ray diffraction, electron microscopy, and solid-state 13C NMR Instron tensile tester was employed to investigate the... 

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