کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5431793 1508823 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhanced viscoelastic properties of graphene oxide membranes
ترجمه فارسی عنوان
خواص ویسکواللاستیکی غشاء اکسید گرافین افزایش یافته است
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی

Viscoelastic materials having high loss factor are receiving enormous importance in damping applications. In this report, several layers of graphene oxide (GO) stacked thick membranes are tuned for their viscoelastic properties, and studied the role of intercalated loosely bound water in deciding their damping ratios (tan δ, ratio of loss modulus to storage modulus). The loosely bound water present inside GO membranes, where the membranes are developed using flow assisted filtration, is removed by ethanol and diethyl ether based room temperature solvent drying technique to study the dynamic mechanical behaviour of the resultant membranes. A huge enhancement in tan δ (>160%) is observed in water removed GO membranes without compromising on its storage modulus, indicating the critical role of water in GO's viscoelastic properties. The in situ tan δ variation of GO paper immersed in ethanol bath is also studied using submersible clamp experiments in dynamic mechanical analyser, where the GO paper has undergone a dewetting phenomenon. These studies show the tunability in the viscoelastic properties of GO macroscopic structures by solvent assisted room temperature intercalation/de-intercalation techniques.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbon - Volume 124, November 2017, Pages 576-583
نویسندگان
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