کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5448470 | 1511777 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ionic interactions to tune mechanical and electrical properties of hydrated liquid crystal graphene oxide films
ترجمه فارسی عنوان
تداخلات یونی برای تنظیم خواص مکانیکی و الکتریکی فیلم های گرافیتی گرافین مایع هیدراته
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کلمات کلیدی
اکسید گرافن، فیلم هیدروژل کریستال مایع، فیلم مستقل آزاد کلرید نمک،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
چکیده انگلیسی
Considerable improvements have been obtained in physical and mechanical properties of free standing liquid crystal graphene oxide (LCGO) films in their hydrated state, by modification of LCGO dispersions with a low quantity of chloride salts. Addition of salts to LCGO dispersions result in an increase of the storage and loss moduli and viscosity through the interaction between cations and functional groups of LCGO, with the magnitude of increase being dependent upon the concentration of the salt added. A viscosity increase of between 30Ã and 300Ã (depending on the salt type) is recorded when salt is added at a concentration as low as 80Â mM while storage and loss moduli increase up to 23Ã and 29Ã, respectively. Free standing films made from the salt treated LCGO dispersions contained up to 26% water in their structure and were observed to have significantly improved mechanical (2Ã to 5Ã increase) and electrical properties (decreased surface resistance up to approximately 670Ã) compared to free standing films prepared without chloride salts. The influence of the salts on properties of LCGO dispersions and their hydrated free standing films is postulated as a complex interplay of many factors such as the size of cations, the valency of positive charge of the cations, ratio of charge and cations size, as well as the hygroscopic nature of the salts.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 186, 15 January 2017, Pages 90-97
Journal: Materials Chemistry and Physics - Volume 186, 15 January 2017, Pages 90-97
نویسندگان
Mohammad Javadi, Sina Naficy, Stephen Beirne, Sepidar Sayyar, Rouhollah Jalili, Simon E. Moulton,