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2.1. Materials
β-CD, acrylic acid (AA), N,N -methylenebisacrylamide (NMBA), acrylamide (AM), K2S2O8, NaCl, CaCl2, and AlCl3, were purchased from the chemical reagent development center of Kemiou Engineering (Tianjin, China). Penicillium, Aspergillus niger (A. niger), and Lentinus edodes (L. edodes) were obtained from the Laboratory of Forest Protection of Northeast Forestry University. All agents used were of analytical grade, and all solutions were prepared with distilled water.
2.2. Synthesis of ˇ-CD-based resin
Cyclohexane (50 mL) and arlacel-80 (10 mL) were mixed in a 250 mL four-neck reaction bottle. Nitrogen flowed through for 10 min, and the reaction temperature was raised to 65 ◦C. Afterwards, β-CD, AA, and AM were added based on their mass ratio. NaOH (1 mol/L) solution was used to adjust the mixture to a specified degree of neutralization. The mixture was uniformly mixed to dissolve the solid samples. K2S2O8 (quantitative initiator) and
NMBA (cross-linking agent) were then added dropwise using a funnel
at a constant rate of 1–2 d/s with stirring. The mixture reacted under nitrogen protection. The temperature was maintained for 0.5 h after the reaction. The mixture passed through a filter, and the filtered cake was dried at 50 ◦C for 48 h until a constant weight was obtained. The cyclohexane filtrate was recycled to achieve granular resin products. A range of products were obtained by changing the reaction factors such as the mass ratio ofβ-CD, AA, and AM, the
dosages of K2S2O8 and NMBA, reaction time, and neutralization degree. The optimum synthesis conditions for the super absorbent resin were explored using water absorbency in distilled water and saline solution as the evaluation indicator.

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1樓 2014-11-04 10:06:20

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2.1. 材料
β-CD，丙烯酸（AA），N，N-甲基雙丙烯酰胺（NMBA），丙烯酰胺（AM），過硫酸鉀，氯化鈉，氯化鈣，氯化鋁，從Kemiou工程（中國(guó)天津）化學(xué)試劑開發(fā)中心購買。青霉，黑曲霉（黑曲霉）和香菇（香菇），從東北林業(yè)大學(xué)森林保護(hù)實(shí)驗(yàn)室獲得。所用的所有試劑均為分析純，所有溶液均用蒸餾水配制。
2.2. β-CD型樹脂的合成
環(huán)己烷（50mL）和ARLACEL-80（10毫升）混合在一個(gè)250ml四頸反應(yīng)瓶中。用氮?dú)饬鬟^10分鐘，并將反應(yīng)溫度升高至65℃。此后，根據(jù)質(zhì)量比加入β-CD，AA，和AM。用NaOH（1摩爾/升）溶液調(diào)節(jié)該混合物到特定的中和度。將混合物均勻混合，以使固體樣品溶解。然后用漏斗以1-2滴/秒的恒定流量逐滴加入加入K2S2O8（定量引發(fā)劑）和NMBA（交聯(lián)劑），并同時(shí)進(jìn)行攪拌。在氮?dú)獗Ｗo(hù)下混合物進(jìn)行反應(yīng)。反應(yīng)完畢后維持該溫度0.5小時(shí)。反應(yīng)混合物通過過濾器，在50℃干燥濾餅48小時(shí)，直到得到恒定的重量。環(huán)己烷濾液再循環(huán)，以達(dá)到粒狀樹脂產(chǎn)品。通過改變?chǔ)?CD，AA和AM的質(zhì)量比，K2S2O8和NMBA的劑量、反應(yīng)時(shí)間，和中和度等反應(yīng)的因素，得到一系列產(chǎn)品。用在蒸餾水和生理鹽水溶液中的吸水性作為評(píng)價(jià)指標(biāo)，探討了超吸水性樹脂的最佳合成條件。

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2樓2014-11-04 10:42:57

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