本文關(guān)鍵詞： 可膨脹石墨 膨脹模型 反應(yīng)動力學(xué) 紅外/毫米波　出處：《南京理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：本文根據(jù)可膨脹石墨的市場現(xiàn)狀及其發(fā)展趨勢,選用市售硫酸、硝酸可膨脹石墨及實驗室制備的無硫可膨脹石墨為研究對象；以可膨脹石墨高溫下的熱分解反應(yīng)動力學(xué)以及膨脹機理、模型為研究核心內(nèi)容；并對可膨脹石墨在抗紅外/毫米波發(fā)煙劑中的應(yīng)用展開研究。文中首先以可膨脹石墨的膨脹體積為標(biāo)準(zhǔn),確定無硫可膨脹石墨制備過程中的各組分最佳用量以及反應(yīng)最佳工藝參數(shù)。選用SEM、FTIR、XRD、TG/DSC現(xiàn)代儀器分析三種可膨脹石墨膨脹前后表觀形貌、內(nèi)部結(jié)構(gòu)以及組成的變化；并根據(jù)可膨脹石墨的TG-DTG曲線,采用經(jīng)典的多升溫速率法FWO法及KAS法計算得到其熱分解反應(yīng)活化能。隨后在對可膨脹石墨膨脹前后的分析表征及反應(yīng)動力學(xué)研究的基礎(chǔ)上,基于Griffith微孔破裂理論,并結(jié)合可膨脹石墨高溫膨脹過程中的能量守恒、質(zhì)量守恒方程,建立了關(guān)于可膨脹石墨在C軸方向高度變化與反應(yīng)時間的簡單數(shù)學(xué)方程,并利用實驗驗證了模型的適用性。最后研究可膨脹石墨在在抗紅外/毫米波發(fā)煙劑中的應(yīng)用,用燃燒實驗確定發(fā)煙劑的初始配方,并利用正交實驗法對配方進行優(yōu)化,得到最佳配方；將最佳配方進行外場測試,實驗結(jié)果顯示：該配方對3mm、8mm波均有衰減,其中對3mm波的衰減效果比較好且配方對中、遠波段的紅外也有比較好的干擾效果。
[Abstract]:According to the market situation and development trend of expandable graphite, this paper selects sulfuric acid, nitric acid expandable graphite and sulfur-free expandable graphite prepared in laboratory as the research object. The thermal decomposition kinetics and expansion mechanism of expandable graphite at high temperature were taken as the core of the study. The application of expandable graphite in infrared / millimeter-wave smoking-resistant agent is studied. Firstly, the expansion volume of expandable graphite is taken as the standard. The optimum dosage of each component and the optimum reaction parameters were determined in the preparation of sulfur-free expandable graphite. The changes of apparent morphology, internal structure and composition of three kinds of expandable graphite before and after expansion were analyzed by means of SEMX FTIR XRDX TG / DSC. According to the TG-DTG curve of expandable graphite, the activation energy of thermal decomposition reaction was calculated by the classical FWO method and KAS method. Then, on the basis of the analysis and characterization before and after expansion of expandable graphite and the study of reaction kinetics, the activation energy of thermal decomposition reaction of expandable graphite was calculated by means of FWO method and KAS method. Based on the Griffith micropore fracture theory and the energy conservation and mass conservation equations of expandable graphite during high temperature expansion, a simple mathematical equation for the height change and reaction time of expandable graphite in C axis is established. Finally, the application of expandable graphite in infrared / millimeter-wave smoking-resistant agent is studied. The initial formulation of the smoke agent is determined by combustion experiment, and the formula is optimized by orthogonal experiment. The experimental results show that the formula can attenuate 3mm ~ 8mm wave, and the attenuation effect of 3mm wave is better, and the medium and far band infrared has better interference effect.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TQ127.11

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