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題 名 | Effect of Block Size and Sequence on the Micellization, Hydrophobicity, and Surface Adsorption of ABC Triblock Methacrylic Polyampholytes by Isothermal Titration Calorimetry=以恆溫滴定微卡計探討ABC三團聯共聚物的團聯段大小和排序對於微胞形成、疏水性和表面吸附的影響 |
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作 者 | 陳文逸; 陳岡宏; 陳暉; 阮若屈; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷 期 | 33:6 2002.11[民91.11] |
頁 次 | 頁599-608 |
分類號 | 460.025 |
關鍵詞 | 恆溫滴定微卡計; 三團聯共聚物; 團聯段; 微胞形成; 疏水性; 表面吸附; Triblock copolymer; Methacrylic polyampholytes; Isothermal titration calorimetry; Critical micelle concentration; Hydrophobicity; Adsorption; |
語 文 | 英文(English) |
中文摘要 | 本研究以水溶性、低分散度、低分子量的甲基炳烯酸團聯聚電解質針對微胞形成、疏水性、溶解度和表面吸附進行系統性探討。此類聚電解質包括□□□, □□□, □□□, □□□, □□□和□□□,其中B為甲基丙烯酸二甲胺乙酯,M為2-甲基丙烯酸甲酯以及A為甲基丙烯酸。利用恒溫滴定微卡計(ITC)測量聚電解質在水溶液中的臨界微胞濃度(CMC),並與以表面張力計和以Dextran/PEG二水相系統所測得的臨界微胞濃度進行比較。此外,並以ITC的數據分析形成微胞所需的熱、聚電解質和微胞的稀釋熱。整體而言,越疏水的聚電解質其CMC值越低,其微胞和單體的稀釋熟也隨之越低。本研究也探討了各式聚電解質的等電點(pI)和對pH值的可溶解區在不同鹽濃度下的實驗。而聚電解質在陰離子交換樹脂上的恒溫吸附曲線,也被用來分析聚電解質和吸附表面間,在不同鹽濃度下的靜電作用力與疏水作用力。所獲得的實驗數據使研究人員對於團聯共聚物應用於生化分離、土壤復育和控制釋放有基本的知識。 |
英文摘要 | The micellization, hydrophobicity, solubilization and surface adsorption of some water-soluble, low-polydispersity, low molecular weight block methacrylic polyampholytes are systematically examined in this study. The polyampholytes were □□□ □□□, □□□, □□□, □□□ and □□□ where B is 2-(dimethylamino) ethyl methacrylate (DMAEMA), M is methyl methacrylate (MMA, and A is methacrylic acid (MAA). Isothermal titration microcalorimetry (ITC) was employed t odetermine the CMC of the polyampholytes in aqueous solution, and the results were compared to the CMC determined by the surface tension and the hydrophobicity specified by the partition between Dextran/PEG two aqueous solution. Moreover, the results of ITC experiments were analyzed to obtain the heat of micellizaiton and the heat of dilution of polyampholytes and micelles. Qualitatively, more hydrophobic polyampholytes correspond to a lower CMC value and les heat of dilution released in both the micelles and monometric solution. The pI value and solvable region of various polyampholytes were also determined in aqueous solutions at different pH values and salt concentration. Additionally, the adsorption isotherms of the polyampholytes with the anion exchange resin were preformed to study the electrostatic and hydrophobic interactions between the polyampholytes and the adsorption surface in various salt concentrations. These results provide useful insights into bioseqparation, soil remediation, controlled release by the applications of triblock co-polymers. |
本系統中英文摘要資訊取自各篇刊載內容。