【正文】 附趨勢是指水相和疏水鏈之間的作用，它迫使兩親分子在相界面。 此外，Δ G mic 隨著 增加疏水鏈長度逐漸下降的。但是，一般的一個過程可能比起另一個更為主要。最大多余表面值 (Γ max)說明席夫堿兩親分子的較低表面濃度有較高的環(huán)氧乙烷含量。最大臨界膠束濃度值 的得出是在 聚環(huán)氧乙烷鏈最長 （ n=68）時濃度為 mM/L下。 臨界膠束濃度， 緩蝕效率 ，最大 剩 余表面 和 最低的 非離子型兩親席夫 堿 最小表面區(qū)域的值 分別 列于表 2。 從癸酸到油酸衍生物增加最大 剩余 表面，顯示有較高的表面濃度，表面活性劑在相界面的分子數也隨著增加。 緩蝕率的值 (π cmc) 隨著增加疏水基的鏈長逐漸降低，它說明表面活性劑分子在界面的累積量增加 。很明顯，表面張力具有非離子型表面活性劑的特征 ，出現了 相對較高的表面張力值。氫氣的析出速度是腐蝕反應速度的反函數，在 氣體定量分析法 中用氫氣的析出代替液體的變化，可以直接讀取數據。重量的變化就是質量損失，用 mg表示。 . Weight loss determination Aluminum coupons of 10cm2 were used for weight loss measurement. Different concentrations of the inhibitors (400– 10 ppm) in 4N HCl solution were used at 25 ?C. Coupons were placed in the corrodent– inhibitor systems and removed at 1 h interval for 4 h. The tested specimens were washed with distilled water and ethanol then dried and weighted. The difference in the weight was taken as the weight loss in mg. The percentage inhibitor efficiency was calculated as [18] %Efficiency = [Wb ?W / Wb] Where Wb and W are the weight loss of aluminum specimens without and with inhibitors, corrosion rates were calculated according to the following formula: Cr (mpy) = KW /ATD where K is the constant, A the area, T the time,W the weight loss in mg and D is the density. . 失重法 的測定 用 10cm2的鋁片 做失重 法實驗。 . Structural analysis The elemental analyses were performed for the synthesized surfactants using Vario Elementar instrument for elemental analysis, Fouriertransform infrared spectrophotometer for FTIR spectra and Bruker model DRX300 NMR spectrometer with TMS as an internal standard for 1H NMR spectra. The results were represented in Table 1. . 結構分析 用 Vario元素分析儀對合成的表面活性劑做元素分析，用 傅里葉變換紅外光譜儀 做 紅外光譜及用 布魯克模型的 DRX 300核磁共振 以 TMS內部 標準 核磁共振光譜 。 方案 方案 2. 合成非離子型的席夫堿的化學結構式 . Synthesis of nonionic Schiff bases amphiphiles Polyethylene glycol monoalkanoate of different molecular weights (400, 1000, 2020 and/or 3000, where, n = 9, 45 and/or 68) and different alkyl chain lengths (R = 10: decanoate。反應混合物回流 6小時，放置過夜直到產物沉淀出來。 在本項目的研究中， 不同的自組裝 緩蝕劑由 含有不同分子量聚乙二醇 鏈端基 合成 的席夫堿制備 。 吸附取決于金屬的性質和緩蝕劑的化學結構 [10]。 鹽酸和硫酸是酸洗浴中最常用的酸 [1,2].很多商業(yè)緩蝕劑組成中都含有醛和胺 [3,4]。 second, they contain the electron clouds on the aromatic rings or, the electronegative atoms such as benzene ringcontaining Schiff bases [5,6]. Schiff base inhibitors have been reported as effectively corrosion inhibitors for steel, copper and aluminum [7– 9]. These substances generally bee effective by adsorption on the metal surface. Adsorption depends on the nature and charge of the metal and also, on the chemical structures of the inhibitors [10]. Selfassembled mono layer can provide a convenient method for corrosion inhibition,since the process of selfassembling is simple, and the chemical position and thickness of selfassembled mono layers can be tailored by design and synthesis of the adsorption agent. The practical applications of selfassembled mono layers as corrosion inhibitors were explored by several investigators [11– 14]. It was found that densely packed selfassembled mono layers heteroatom containing pounds were effective for blocking certain electrochemical processes, thus effectively act as corrosion inhibitors. In this study, different selfassembled inhibitors containing polyethylene glycol chains with different molecular weights and Schiff base terminal group were synthesized. The corrosion inhibition efficiencies of these pounds towards aluminum alloy were examined using weight loss and hydrogen evolution techniques. The surface activities of these Schiff base amphiphiles and the surface activity– corrosion inhibition–chemical structure relationships were also discussed. 1. 概括 黑色 金屬 ，有色金屬及其合金被廣泛應用于工業(yè) 中。 用 失重 法 和析氫技術 評價 不同劑量（ 40010ppm）的 合成的兩親分子 作為鋁（ 3SR）的緩蝕劑在酸性介質（ 4N HCl）中的緩蝕效果。 關鍵詞：非離子表面活性劑 希夫堿 吸附 表面張力 緩蝕 緩蝕速率 緩蝕效率 a b s t r a c t A novel series of selfassembled nonionic Schiff base amphiphiles was synthesized and their chemical structures were confirmed using elemental analysis, FTIR spectroscopy and 1H NMR spectra. The surface activities of these amphiphiles were determined based on the data of surface and interfacial tension, critical micelle concentration, effectiveness, efficiency, maximum surface excess and minimum surface area. Thermodynamics of adsorption and micellization processes of these amphiphiles in their solutions were also calculated. The surface and thermodynamic data showed their higher tendency towards adsorption at the interfaces. The synthesized amphiphiles were evaluated as corrosion inhibitors for aluminum (3SR) at different doses (400– 10 ppm) in acidic medium (4N HCl) using weight loss and hydrogen evolution techniques. The corrosion measurements showed that the synthesized nonionic Schiff bases could serve as effective corrosion inhibitors. The surface and corrosion inhibition activities were correlated to the chemical structures of the inhibitors. 摘要