کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6480965 1428780 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Study on the three dimensional mechanism of graphene oxide nanosheets modified cement
ترجمه فارسی عنوان
بررسی مکانیزم سه بعدی سیمان اصلاح شده نانو ذرات اکسید گرافین
کلمات کلیدی
اکسید گرافن، سیمان، ساز و کار سه بعدی، واکنش شیمیایی، خاصیت مکانیکی،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی


- The first discovery of the 3D network structure of GO nanosheets in cement system.
- First demonstration of the chemical reactions between GO and hydration products.
- Provide a new direction of GO nanosheets were used for improving cement properties.

This paper has established a 3D mechanism model of graphene oxide (GO) nanosheets modified cement. The GO nanosheets were compounded by the improved Hummers' method and characterized by Fourier transform infrared spectroscope (FTIR), transmission electron microscope (TEM) and atomic force microscope (AFM). The mechanism of GO nanosheets modified cement was investigated by scanning electron microscope (SEM), differential scanning calorimeter (DSC), thermogravimetric analysis (TGA), FTIR and X-ray photoelectron spectroscope (XPS). Based on these analyses, it was confirmed that the -COOH in the GO nanosheets reacted with the hydration product of cement (Ca(OH)2). The chemical reactions connected the GO nanosheets each other, producing a 3D network structure in the GO nanosheets modified cement. Moreover, the hydration products were also inserted into this 3D network structure. Therefore, the introduction of GO nanosheets improved the mechanical properties of cement composites.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 126, 15 November 2016, Pages 730-739
نویسندگان
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