کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1440840 1509381 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation of electrically conductive bucky-sponge using CNT-cement: Conductivity control using room temperature ionic liquids
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد بیومتریال
پیش نمایش صفحه اول مقاله
Preparation of electrically conductive bucky-sponge using CNT-cement: Conductivity control using room temperature ionic liquids
چکیده انگلیسی


• CNT-core/chitosan-shell structured bucky sponges prepared using of RTIL porogen.
• Their high porosities up to 98% and lower volume resistivities than 3.22 Ω cm.
• The volume resistivity almost linearly related to the volume increase.
• An effective method to reduce the possibility to break CNT–CNT connections by volume change.

We present CNT bucky-sponges prepared using CS-NH2/CNT-cement (CNT nanohybrid molecules individually wrapped with chitosan molecules) as a construction material and an imidazolium based room temperature ionic liquid (RTIL) as a liquid porogen. The nano-sized and micro-sized pores with various width (respectively, about <20 nm and 20–300 μm) were controllably produced by increasing the amount of RTIL used (from 1 to 5 g). It was confirmed by SEM characterization that both types of pores coexist within the CNT frameworks with chitosan skin. Total pore volumes calculated from the volume increase of the sponge samples ranged in percentage from 89 to 98. Porosity of the CNT bucky-sponges, caused by the micro-pores and measured with a mercury porosimeter, ranged between 5 and 28% controlled by the amount of RTIL used. BET surface area and volume resistivity of the CNT sponges were in the ranges of, respectively, 19.7–94.5 m2/g and 0.022–3.22 Ω cm. The prepared CNT sponges showed important characteristics indicating broad applicability as a conductive polymer framework, drug carrying scaffold, catalyst support, oil adsorbents, and molecular sieve membrane.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Synthetic Metals - Volume 196, October 2014, Pages 92–98
نویسندگان
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