【摘要】：本文采用甲基丙烯酸共價接枝改性堿性鈣基膨潤土,并對其進行了紅外光譜分析儀,X射線衍射儀,掃描電鏡等表征。結果表明：甲基丙烯酸通過體積效應和中和反應放熱效應有效剝離堿性鈣基膨潤土；甲基丙烯酸根并有效連接在膨潤土片層上形成多觸角甲基丙烯酸膨潤土片層；通過對改性體系的結構性能設計、合成工藝的嚴格監(jiān)控,考察了有機改性膨潤土的結構與工藝條件間的影響規(guī)律,獲得了制備多觸角甲基丙烯酸膨潤土(MAABMT)的工藝參數(shù)。將甲基丙烯酸膨潤土以“超”高填充量添加至聚丙烯酸鈉聚合物中制備復合材料,考察MAABMT的添加量,交聯(lián)劑的用量,引發(fā)劑的用量以及中和度對復合材料的吸水性的影響,在最優(yōu)條件下,其吸水率高達1287g/g；同PAA吸水材料相比,該復合材料具有較好的保水性能；并對該復合材料進行吸水動力學研究,結果表明該復合材料吸水速率快,吸水性也較強；同時對MAABMT的觸角數(shù)量、結構、性能等因素對復合材料中膨潤土與聚丙烯酸鈉基體間的相容性的影響進行了研究,結果表明多觸角的結構極大改善了復合材料中兩相間的相容性。將MAABMT應用于重金屬Cu2+與有機污染物亞甲基藍進行吸附研究,并對MAABMT的觸角數(shù)量及結構等因素與吸附效率之間的影響規(guī)律進行探討,結果表明,甲基丙烯酸膨潤土對Cu2+和亞甲基藍有很好的吸附效果。
[Abstract]:In this paper, basic calcium bentonite was modified by covalent grafting of methacrylic acid, and characterized by infrared spectrometer, X-ray diffractometer and scanning electron microscope. The results show that methacrylic acid can effectively peel off basic calcium bentonite by volume effect and neutralization reaction exothermic effect, and methacrylate radical can effectively connect to bentonite lamellae to form multiple antennae methacrylate bentonite lamellae. Through the design of the structure and properties of the modified system and the strict monitoring of the synthesis process, the influence of the structure and the technological conditions of the organic modified bentonite was investigated, and the process parameters for the preparation of polyantennal bentonite methacrylate (MAABMT) were obtained. Bentonite methacrylate was added to the polyacrylate polymer to prepare the composite with "super" high filling amount. The effects of the addition amount of MAABMT, the amount of crosslinking agent, the amount of initiator and the neutralization degree on the water absorption of the composite were investigated. Under the optimum conditions, the water absorption rate is as high as 1287g / g; Compared with the PAA absorbent material, the composite has better water retention performance, and the water absorption kinetics of the composite is studied. The results show that the water absorption rate of the composite is faster and the water absorption is stronger. At the same time, the effects of the number, structure and properties of MAABMT on the compatibility between bentonite and sodium polyacrylate matrix were studied. The results showed that the structure of multiple antennae greatly improved the compatibility between the two phases in the composite. MAABMT was applied to the adsorption of heavy metal Cu2 and organic pollutant methylene blue, and the influence of the number and structure of MAABMT on the adsorption efficiency was discussed. Bentonite methacrylate has a good adsorption effect on Cu2 and methylene blue.
【學位授予單位】：廣西大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TB33;O647.3

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