کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9675962 | 1454111 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Langmuir-Blodgett film fabricated with dendrimer modified polyimide
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
شیمی کلوئیدی و سطحی
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چکیده انگلیسی
Langmuir-Blodgett films were prepared from a soluble polyimide modified by a dendrimer wedge (NMPI). The terminal group of the dendrimer can be formed as nitrile or ester groups. The specific area and collapse pressure of the Langmuir layers on the water surface could be controlled by appropriate choice of the terminal group of the dendrimer wedge and subphase pH. ODA (octadecylamine) and AA (arachidic acid) were employed as spacers to enhance the stability of the Langmuir film. AA can improve the stability of NMPI Langmuir film to a higher extent than ODA because of the higher interaction between the NMPI and AA. The long alkyl chain compounds were removed from the LB film subsequently by thermal treatment. The LB films were characterized by polarized FT-IR, UV, VASE and XPS. The refractive index of the LB film increased after thermal treatment; however, it is lower than that of the unmodified polyimide LB film. This work illustrates the influence of the dendrimer wedge in forming porous multilayer films.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volumes 257â258, 5 May 2005, Pages 183-190
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volumes 257â258, 5 May 2005, Pages 183-190
نویسندگان
Zhigang Jia, M.P. Srinivasan,