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研究生： 陳瑩芝
論文名稱： 兩性離子型水膠作為自養護劑之研究
指導教授： 許貫中
學位類別： 碩士
Master
系所名稱： 化學系
Department of Chemistry
論文出版年： 2010
畢業學年度： 98
語文別： 中文
論文頁數： 135
中文關鍵詞： 兩性離子型 、水膠 、自養護劑 、砂漿 、吸水率
論文種類： 學術論文
相關次數： 點閱：209  下載：0 
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    • 本論文為延續可敬學長的方法，製備一種兩性離子型的高吸水性水膠，使用丙烯醯胺和disodium 1-(4-(3-((carboxylatomethyl)dimethylammonio)propylamino)- 4-oxobut-2-enoate)(CDP)為單體，交聯劑為MBA，起始劑為APS聚合而成的poly(AAm-co-CDP)。使用FT-IR作結構鑑定，樣品表面孔洞透過電子顯微鏡觀察，影響反應的參數包括：單體比例、起始劑劑量、交聯劑劑量和反應溫度，接著浸泡到純水和鹽水中測其吸水率。接著評估PCA水膠加到水泥漿和水泥砂漿中作為自養護劑是否合宜，於水泥漿中探討其水化程度、圓盤裂縫和凝結時間；水泥砂漿中則探討水分重量損失、抗壓強度、內部濕度和乾縮量。
    實驗結果顯示，當單體比例= 0.67 (mol/mol)，MBA劑量= 0.5 mol%，APS劑量= 1.3 mol%，反應溫度75℃，PCA水膠在純水中的吸水率為421（g/g），0.1M NaCl(aq) 和0.1M CaCl2(aq)的吸水率分別為46.4、40.2 （g/g）。將PCA水膠加入水泥砂漿中當自養護劑，最佳添加劑量為0.25wt%，對水泥砂漿試體的重量損失、抗壓強度、內部濕度和乾縮量與未添加水膠的控制組相比，均有提升效果。
    接著在水泥漿中發現，添加水膠在初期會延緩水化程度，但後期則會使水泥水化更完整。在圓盤裂縫測試中，發現水膠添加能有效減少裂縫生成，但添加量過多卻會造成表面缺陷。添加水膠會使水泥漿提前初凝時間，延緩終凝時間。

    This main goal of thesis is contium how to prepare a zwitterionic superabsorbent hydrogel. Poly (AAm-co-CDP) is synthesized by acrylamide and disodium 1-(4-(3-((carboxylatomethyl) dimethylammonio)propylamino)-4-oxobut-2-enoate) (CDP) as monomer、MBA as crosslinker, and APS as initiator. Using FT-IR to identify structure,surface porosity is observed by TM-1000. The parameters what could be effected experiment are monomer ratio,initiator dosage, crosslinker dosage, and reaction temperature. Then
    measure hydrogel water absorbency in water and saline solution. We estimate is it reasonable which using PCA hydrogel add into cement paste and mortar as self-curing reagent. Then we researched hydration degree,
    cracking index, and setting time in cement paste. We calculated weight-loss, compressive strength, internal humidity, and drying shrinkage.
    The result indicate that when in the optimum recipe, PCA hydrogel water absorbency is 420 g/g in water, in 0.1M NaCl(aq) is 46.4,and 40.2 g/g in 0.1M CaCl2(aq). When we add PCA hydrogel into mortar as self-curing reagent, the optimum dosage is 0.25 wt%, in this condition,improve performance in weight-loss, compressive strength, internal
    humidity, and drying shrinkage are better than control group which not adding PCA hydrogel. In cement paste, add PCA hydrogel would retard hydration in initial stage, retard initial setting time, also reduce craking formation.

    摘要 2 Abstract 4 謝誌 6 目錄 7 圖目錄 12 表目錄 15 第一章 緒論 16 1-1 研究背景 16 1-2 研究目的 18 1-3 研究內容 18 第二章 文獻回顧 20 2-1 水膠之簡介 20 2-2 影響水膠膨潤之作用力 21 2-2-1 交聯密度 22 2-2-2 離子強度 23 2-3 水膠的種類 23 2-4 水膠的應用 26 2-5 高吸水性水膠相關文獻彙集 30 2-6 水泥 32 2-6-1 卜特蘭水泥之組成 32 2-6-2 水泥之水化 32 2-7 水泥漿水分存在形式 34 2-8 混凝土收縮變形種類 38 2-9 養護之分類 38 第三章 合成實驗流程與方法 42 3-1 實驗簡介 42 3-2 實驗材料與實驗設備 45 3-2-1 藥品清單 45 3-2-2 水泥、砂和強塑劑 45 3-2-3 實驗設備 46 3-3 實驗方法 48 3-3-1 DAPA之合成 48 3-3-2 CDP之合成 49 3-3-3 PCA之合成 50 3-4 聚合物PCA結構鑑定及性質分析 52 3-4-1 紅外線 (IR) 光譜分析 52 3-4-2 核磁共振 (1H-NMR) 光譜分析 52 3-4-5 水膠釋水之測量 53 3-5 聚合物PCA對水泥漿之性質分析 54 3-6 聚合物PCA對水泥砂漿之性質分析 58 3-7 實驗配比 61 第四章 結果與討論 65 4-1 結構鑑定 65 4-1-1 DAPA 結構鑑定 67 4-1-2 CDP結構鑑定 69 4-1-3 PCA 結構鑑定 70 4-2 PCA水膠之孔洞結構 75 4-3 反應條件對PCA水膠吸水率之影響 75 4-3-1單體比例對PCA吸水率之影響 75 4-3-2 交聯劑劑量對PCA吸水率之影響 78 4-3-3 起始劑劑量對PCA吸水率之影響 80 4-3-4 反應溫度對PCA吸水率之影響 82 4-4鹽水溶液對PCA水膠吸水率之影響 84 4-4-1 鹽水濃度對PCA水膠吸水率之影響 85 4-4-2不同陽離子價數對PCA水膠吸水率之影響 87 4-5 PCA水膠在pore solution中的吸水率 89 4-6 BC283HA水膠之性質 93 4-7 PCA水膠對水泥砂漿試體性質之影響 97 4-7-1 水膠預先吸水對砂漿試體重量損失之影響 97 4-7-2 水膠劑量對水泥砂漿試體重量損失之影響 100 4-7-3 水膠劑量對試體內部濕度之測量 104 4-7-4 水膠劑量對砂漿抗壓強度之影響 106 4-7-5 水膠劑量對砂漿乾縮量之影響 109 4-8 水膠對水泥漿體之影響與試驗 111 4-8-1 XRD定性分析 111 4-8-2 DSC分析 115 4-8-3 水膠劑量對圓盤試體裂縫之影響 120 4-8-4 水膠劑量對凝結時間之影響 124 4-9 小結 126 第五章 結論 127 第六章 參考文獻 129

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