Study On Preparation Of Carbon Fiber Precursors From Wooden Packaging Waste

This article mainly discusses cellulosic as a material, using Liquefaction technology, by means of Prepared by melt spinning cellulose-based carbon fiber precursor, optimized Cellulose liquefaction process, by HAAKE rheometer, The field emission scanning electron microscope, Infrared spectroscopy, thermal gravimetric analysis, X-ray photoelectron spectroscopy, X-ray diffraction, Raman spectrometer to analyze the rheological properties of the spinning solution, the morphology of the raw silk, raw silk Prepared process of the chemical composition and chemical groups, as well as the original wire TG. And some research has also been done on the changing of Mechanical properties, morphology and structure of the carbon filaments, the formation of the graphite crystallites, the degree of graphitization, and the surface of the carbon filament chemical composition and chemical group. IR, TG-MS analyzer, elemental analyzer are used to infer the cellulose-based carbon fiber precursor carbonization. The main conclusions are presented as follows:(1) There are 4 Influencing factors of Cellulose liquefaction process in the proper order:Catalyst content> Solid-liquid ratio (Cellulose/phenol)> Liquefaction temperature > Liquefaction time. The Optimum process of Liquefaction temperature is 140℃, Reaction time is 3 hours. Solid-liquid ratio (Cellulose/phenol) is 1:6, Catalyst content is 9% anu Residue rate is 1.25%.(2) Cellulose liquefied spinning solution is Non-Newtonian fluid. With Shear rate increasing, Spinning solution shows Shear thinning, spinning solution is sensitive to the changing of temperature. When temperature goes up, spinning solution’s viscosity decreases. With Solid-liquid ratio (Cellulose/phenol) increasing, enhancing Spin ability.(3) It is concluded from the analysis of Infrared spectra of the cellulose-based carbon fiber precursor Elemental and the results of the analysis of the TG-MS that there are 3 changing stages for Cellulose-based carbon fiber precursor during the temperature from 300 ℃ to 1000℃ when referring to the Carbonization process.Step 1, when the carbonization temperature is below 300℃, less mass loss of cellulose-based carbon fiber precursor will happen. Disengagement of the main reaction changes to the intermolecular ether bond and hydroxymethyl.Step 2, when the carbonization temperature is between 300℃ and 500℃, a cellulose-based carbon fiber precursor weightlessness District appears. At the same time, great changes also occur for the original wire structure.Step 3, when the carbonization temperature is higher than 500℃, the original wire structure of the carbon network continues to grow, further improving the degree of polymerization of the carbon network. When the carbonization temperature is between 550 ℃～780℃, a second rearrangement of the intermolecular carbon fiber structure happens.