發(fā)布時間：2018-08-24 19:26

【摘要】：以3,6-二甲基-2,5-吡嗪二羧酸(P)和三聚氰胺(M)為組分,采用不同的摩爾比(1∶1,1∶2,1∶3)混合配制了3個樣品PM11,PM12和PM13,并對其凝膠性能進行了測試.實驗結果表明,PM能在水中及部分含水有機溶劑中形成穩(wěn)定的凝膠,這些凝膠對酸堿具有良好的響應性能.采用掃描電子顯微鏡分析了3種水凝膠的微觀形貌,均為纖維狀的網絡結構;紅外光譜及紫外光譜測試結果表明氫鍵是形成凝膠的關鍵驅動力;XRD測試結果顯示凝膠為層狀結構.對PM12在不同pH值的水中的凝膠性能測試結果表明,在pH=3~11的范圍內PM12均能形成凝膠.測試了PM12在混合溶劑中的凝膠性能,并將測試結果與混合溶劑的Hansen溶解度參數關聯(lián),以便用于分析溶劑與凝膠因子間的相互作用,所得結果亦表明氫鍵在凝膠形成的過程中起重要作用.
[Abstract]:Three samples of PM11,PM12 and PM13, were prepared and their gel properties were tested by using different molar ratio (1: 1: 1: 1: 2: 1: 3) of (P) and melamine (M), which were composed of 3 dimethyl-6-dimethyl-5-pyrazine dicarboxylic acid (P) and melamine (M). The experimental results show that PM can form stable gels in water and some aqueous organic solvents, and these gels have good response to acid and alkali. Scanning electron microscopy (SEM) was used to analyze the microstructure of the three hydrogels, all of which were fibrous network structure, and the results of IR and UV spectra showed that hydrogen bond was the key driving force to form the gel. The XRD results showed that the gel was layered. The gel properties of PM12 in water with different pH values showed that the gel could be formed by PM12 in the range of pH=3~11. The gel properties of PM12 in mixed solvents were tested, and the results were correlated with the solubility parameters of Hansen for the purpose of analyzing the interaction between solvent and gel factor. The results also show that hydrogen bond plays an important role in the formation of gel.
【作者單位】： 天津大學化工學院系統(tǒng)生物工程教育部重點實驗室;
【基金】：天津市自然科學基金(批準號:15JCYBJC20100)資助~~
【分類號】：O648.17

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