造纸污泥的资源化利用及填充PVC复合材料的研究

发布时间：2018-07-08 18:10

本文选题：造纸污泥 + 表面改性　；参考：《华东理工大学》2017年硕士论文

【摘要】：随着工业的迅速发展,造纸业已成为中国重要的工业污染源之一。造纸厂在制浆造纸过程中,对所产生的造纸工业废水进行沉淀和浓缩等处理,从而产生大量的固体废弃物,即造纸污泥(PMS)。PMS含水率高,固体组成富含碳酸钙、高岭土等无机物和纤维素、半纤维素、木质素等有机物,成分复杂,因此PMS的有效处理和资源化利用是造纸行业亟须解决的关键问题。本论文研究了PMS理化性能,对其成分和表面特性进行分析,获悉本次实验研究的PMS主要成分为碳酸钙等无机物(72.6wt.%),颗粒表面呈亲水性。针对PMS表面特性,设计PMS表面改性方案,以吸油值和“PMS-液体石蜡”悬浮液粘度为改性效果评价指标,研究了硬脂酸钠(NaSt)、十二烷基苯磺酸钠(SDBS)、硅烷偶联剂KH550和KH560分别在不同改性温度和改性时间下对PMS改性效果的影响,筛选合适的改性工艺和表面改性剂进行复配改性。采用了NaSt和KH550复配,对PMS改性获得显著效果,其吸油值可降至54.97g/100g,粘度降至115.8mPa·s。其次,研究了干燥温度、干燥风速和表面改性对PMS干燥过程的影响,建立了PMS的干燥动力学模型。Midilli模型能较好的描述PMS干燥过程,PMS的水分有效扩散系数Deff在实验范围内为6.51～18.64×10-9 m2/s,干燥活化能为Ea为22.23 kJ/mol。最后,利用表面改性技术和干燥技术,将制得的改性PMS填充于PVC复合材料,研究其对复合材料力学性能、热稳定性和微观形貌的影响,通过重钙(GCC)和PMS改性前后对材料性能的研究,分析了PMS作为热塑性树脂基复合材料填充剂的可行性,以实现PMS资源化利用。
[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.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X793;TQ327.8

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