Research Of Bio-fibre Micro-nano Technology Based On Mechanochemical Method

Global energy crisis and resource shortage problem are becoming increasingly serious, which makes people pay more attention to the research and application of renewable resources. As a renewable resource, biomass fiber has become the main raw material for producing nano cellulose. Nano cellulose has a broad application prospect in various fields with its excellent properties. At present, Low energy consumption and high efficiency of the realization of micro nano fiber has become a scientific problem to be studied. The mechanical force chemical method is the physical change and chemical reaction caused by mechanical force, which can be used to realize the functions of general physical and chemical reactions are difficult to achieve used in the preparation of nano crystal and nano composite materials.Firstly, the research background and present situation of nano cellulose were summarized.the existing preparation methods of nano cellulose were analyzed,the experimental scheme and framework of this paper were presented.Secondly, based on the dissolution mechanism of cellulose, the pretreatment process parameters of NaOH / Urea solution were studied. Material analysis in double disc mechanical force chemical and physical properties of the conversion process, the biomass fiber micro nano wire mechanism.Then, the size, microstructure, crystal structure and chemical structure of nano cellulose were characterized by scanning electron microscope, transmission electron microscope, X- ray diffraction and Fourier infrared spectrometer.Finally, analysis results show:7.5% NaOH/10% Urea solution pretreatment of nano cellulose suspension system is the most stable. The scanning electron microscope showed that the diameter of nano cellulose was 0.6 ~ 0.05 μm, and the average diameter was 0.25 μm. The diameter of the nanoparticles was smaller than that of the untreated. XRD and FTIR showed that the relative crystallinity of nano cellulose was lower than that of the no pretreated cellulose, and the relative crystallinity of the prepared nano cellulose was lower than that of the untreated.