發(fā)布時間：2018-07-08 18:10

  本文選題：造紙污泥 + 表面改性��； 參考：《華東理工大學》2017年碩士論文

【摘要】：隨著工業(yè)的迅速發(fā)展,造紙業(yè)已成為中國重要的工業(yè)污染源之一。造紙廠在制漿造紙過程中,對所產生的造紙工業(yè)廢水進行沉淀和濃縮等處理,從而產生大量的固體廢棄物,即造紙污泥(PMS)。PMS含水率高,固體組成富含碳酸鈣、高嶺土等無機物和纖維素、半纖維素、木質素等有機物,成分復雜,因此PMS的有效處理和資源化利用是造紙行業(yè)亟須解決的關鍵問題。本論文研究了PMS理化性能,對其成分和表面特性進行分析,獲悉本次實驗研究的PMS主要成分為碳酸鈣等無機物(72.6wt.%),顆粒表面呈親水性。針對PMS表面特性,設計PMS表面改性方案,以吸油值和“PMS-液體石蠟”懸浮液粘度為改性效果評價指標,研究了硬脂酸鈉(NaSt)、十二烷基苯磺酸鈉(SDBS)、硅烷偶聯劑KH550和KH560分別在不同改性溫度和改性時間下對PMS改性效果的影響,篩選合適的改性工藝和表面改性劑進行復配改性。采用了NaSt和KH550復配,對PMS改性獲得顯著效果,其吸油值可降至54.97g/100g,粘度降至115.8mPa·s。其次,研究了干燥溫度、干燥風速和表面改性對PMS干燥過程的影響,建立了PMS的干燥動力學模型。Midilli模型能較好的描述PMS干燥過程,PMS的水分有效擴散系數Deff在實驗范圍內為6.51～18.64×10-9 m2/s,干燥活化能為Ea為22.23 kJ/mol。最后,利用表面改性技術和干燥技術,將制得的改性PMS填充于PVC復合材料,研究其對復合材料力學性能、熱穩(wěn)定性和微觀形貌的影響,通過重鈣(GCC)和PMS改性前后對材料性能的研究,分析了PMS作為熱塑性樹脂基復合材料填充劑的可行性,以實現PMS資源化利用。
[Abstract]:With the rapid development of industry, paper industry has become one of the important industrial pollution sources in China. In the pulping and papermaking process, the wastewater produced in the paper mill is treated with precipitation and concentration, resulting in a large number of solid wastes, I. E. the high moisture content of papermaking sludge (PMS). PMS, the solid composition is rich in calcium carbonate. Inorganic substances such as kaolin, cellulose, hemicellulose, lignin and other organic compounds are complex, so the effective treatment and utilization of PMS are the key problems to be solved in papermaking industry. In this paper, the physical and chemical properties of PMS were studied, and the composition and surface properties of PMS were analyzed. It was found that the main composition of PMS in this experiment was calcium carbonate (72.6 wt.wt%), and the particle surface was hydrophilic. According to the surface characteristics of PMS, the surface modification scheme of PMS was designed. The oil absorption value and viscosity of "PMS-liquid paraffin" suspension were taken as the index to evaluate the modification effect. The effects of sodium stearate (sodium stearate), sodium dodecyl benzene sulfonate (SDBs), silane coupling agents KH550 and KH560 on the modification of PMS at different modification temperatures and time were studied. The modified PMS was modified with NaSt and KH550. The oil absorption value decreased to 54.97 g / 100 g and the viscosity decreased to 115.8 MPA SPA. Secondly, the effects of drying temperature, drying speed and surface modification on the drying process of PMS were studied. The drying kinetics model of PMS. Midilli model is established to describe the drying process of PMS. The effective diffusion coefficient of water in PMS is 6.51 ~ 18.64 脳 10 ~ (-9) m ~ (-2 / s), and the activation energy of drying is 22.23 kJ 路mol ~ (-1) 路min ~ (-1) 路m ~ (-2) 路s ~ (-1). Finally, the modified PMS was filled in PVC composites by surface modification and drying technology. The effects of PMS on mechanical properties, thermal stability and micromorphology of PVC composites were studied. The feasibility of using heavy calcium (GCC) and PMS as fillers for thermoplastic resin matrix composites before and after modification was analyzed in order to realize the utilization of PMS.
【學位授予單位】：華東理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：X793;TQ327.8

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本文編號：2108274