English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 49378/84106 (59%)
造訪人次 : 7363628      線上人數 : 73
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋
    請使用永久網址來引用或連結此文件: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/25570

    題名: Amphiphilic Polyoxyalkylene Triblock Copolymers: Self-Assembly, Phase Behaviors, and New Applications
    作者: Liu, Tian-bo;Wu, Chun-hung;Xie, Yi;Liang, De-hai;Zhoum Shui-qin;Nace, Vaughn M.;Chu, Benjamin
    貢獻者: 淡江大學化學學系
    日期: 2000-08
    上傳時間: 2009-12-01 09:01:11 (UTC+8)
    出版者: Washington, D.C.: American Chemical Society
    摘要: The study on the micellization behavior of amphiphilic block copolymers in aqueous media has reached the stage where semi-quantitative analysis and prediction of micellar parameters and phase behavior are possible. The deeper understanding has provided an incentive to explore new applications on these self-assembled systems. In this chapter, we summarize the self-assembly and phase behavior of polyoxyalkylene triblock copolymers containing E and P, or E and B blocks (with E, P, B being polyoxyethylene, polyoxypropylene and polyoxybutylene, respectively), in aqueous solution. Laser light scattering was used to characterize micellar parameters in the dilute solution regime and small-angle X-ray scattering was employed to study gel-like ordered packings of the micelles at high polymer concentrations. The hydrophobic blocks form micellar cores and are mainly responsible for the formation of micelles (cmc, aggregation number, and thermodynamic parameters). The hydrophilic block length determines the micellar size and intermicellar interactions. The co-association behavior of a mixture of two different block copolymers in aqueous solution has also been elucidated. The effect of block length on phase separation (clouding temperature) can be discussed on the basis of experimentally determined empirical rules. At high polymer concentrations, unique gel-like micellar packings and their spatial supramolecular rearrangements (e.g., bcc, hexagonal, lamellar) occurred. The phase diagrams could be very rich, especially with the addition of another immiscible solvent. These gel-like materials with ordered hydrophilic-hydrophobic packings gave access to new applications in analytical and biological sciences — the structure served as a medium in capillary gel electrophoresis, e.g., for double-stranded DNA analysis with single base-pair resolution.
    關聯: Associative polymers in aqueous media 765, pp.2-20
    顯示於類別:[化學學系暨研究所] 專書之單篇


    檔案 大小格式瀏覽次數



    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回饋