本文選題：改性密胺減水劑 + 對(duì)氨基苯磺酸鈉　； 參考：《河南師范大學(xué)》2013年碩士論文

【摘要】：本文詳細(xì)研究了目前常用的高效減水劑的分類及其結(jié)構(gòu)特征，密胺減水劑的國(guó)內(nèi)外研究、應(yīng)用現(xiàn)狀，并且介紹了其減水作用機(jī)理和目前所面臨的問題。 本文介紹了密胺減水劑的傳統(tǒng)合成方法及各個(gè)反應(yīng)階段的反應(yīng)原理，按照減水劑的高性能化設(shè)計(jì)原理，引入對(duì)氨基苯磺酸鈉和氨基磺酸鹽兩種改性單體，以四步合成工藝制備改性密胺減水劑，對(duì)比不同原材料投料比和合成工藝參數(shù)所制備的密胺減水劑的減水分散效果；分析并總結(jié)了影響減水劑合成及分散性能的一系列因素，通過正交試驗(yàn)優(yōu)化了合成工藝和相關(guān)的參數(shù)，找出了顯著的影響因素，并對(duì)各個(gè)試驗(yàn)影響因素進(jìn)行了分析、優(yōu)化，最終得出最佳的改性密胺減水劑合成工藝。通過嚴(yán)格控制各個(gè)影響因素，提高了改性密胺減水劑的羥甲基化率和磺化率，最終提高了其減水分散性能。在低成本化研究中，使用活性單體尿素取代了三聚氰胺單體以降低其生產(chǎn)成本，研究了不同替代量時(shí)改性密胺減水劑的減水分散性能，并對(duì)其具體的反應(yīng)原理進(jìn)行了探討。 試驗(yàn)結(jié)果表明，，以四步法合成的對(duì)氨基苯磺酸鈉改性密胺減水劑（SS-MSM）和氨基磺酸鹽改性密胺減水劑（SA-MSM）性能優(yōu)異。各個(gè)反應(yīng)階段中，羥甲基化階段的pH值、反應(yīng)溫度，磺化階段的pH、反應(yīng)溫度、反應(yīng)時(shí)間，磺化階段中磺化劑與三聚氰胺的摩爾比，縮合反應(yīng)中的pH值，縮合時(shí)間對(duì)減水劑合成性能影響顯著。尿素改性的低成本U-MSM合成過程中，尿素的最佳替代量為5%，其減水分散效果沒有降低，成本大幅度下降。按照相關(guān)的國(guó)家標(biāo)準(zhǔn)進(jìn)行測(cè)試，改性的密胺減水劑SS-MSM、SA-MSM的水泥凈漿流動(dòng)度、減水率、水泥適應(yīng)性和抗壓強(qiáng)度比都遠(yuǎn)遠(yuǎn)優(yōu)于市售的傳統(tǒng)密胺減水劑（SM）。
[Abstract]:In this paper, the classification and structural characteristics of the commonly used superplasticizer, the research and application of melamine water reducer at home and abroad are studied in detail, and the mechanism of its water-reducing action and the problems it faces are also introduced in this paper. In this paper, the traditional synthesis method of melamine water reducer and the reaction principle of each reaction stage are introduced. According to the high performance design principle of water reducer, two modified monomers, sodium p aminobenzenesulfonate and amino sulfonate, are introduced. The modified melamine water reducer was prepared by four-step synthesis process, and the water reducing dispersion effect of the melamine water reducer prepared by different raw material ratio and synthetic process parameters was compared, and a series of factors affecting the synthesis and dispersion properties of the water reducer were analyzed and summarized. The synthetic process and related parameters were optimized by orthogonal test, and the significant influencing factors were found out, and the influencing factors were analyzed and optimized. Finally, the optimum synthetic process of modified melamine water reducer was obtained. The hydroxy methylation rate and sulfonation rate of the modified melamine water reducer were improved by strictly controlling the influencing factors, and the water reducing dispersion of the modified melamine water reducer was improved. In the low cost research, the melamine monomer was replaced by the active monomer urea to reduce the production cost. The water reducing dispersion of the modified melamine water reducer with different substitution amounts was studied, and the concrete reaction principle was discussed. The results showed that the modified melamine water reducer (SS-MSM) and amino-sulfonate modified melamine superplasticizer (SA-MSM) synthesized by four-step method had excellent properties. The pH value of hydroxy methylation stage, reaction temperature, sulfonation stage pH, reaction temperature, reaction time, the molar ratio of sulfonate to melamine in sulfonation stage, the pH value in condensation reaction, Condensation time has a significant effect on the synthetic properties of water reducer. In the process of synthesis of low cost U-MSM modified by urea, the optimum substitution amount of urea is 5%, but the water reducing and dispersing effect of urea is not reduced, and the cost is greatly reduced. According to the relevant national standards, the modified melamine superplasticizer SS-MSM SA-MSM is much better than the traditional melamine water reducer SS-MSMSA-MSM in cement slurry fluidity, water reducing rate, cement adaptability and compressive strength ratio.
【學(xué)位授予單位】：河南師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU528.042.2

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本文編號(hào)：1966411