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材料研究学报  2018, Vol. 32 Issue (3): 233-240    DOI: 10.11901/1005.3093.2016.679
  研究论文 本期目录 | 过刊浏览 |
氧化石墨烯/水泥基复合材料的微观结构和性能
吕生华1(), 张佳1, 罗潇倩1, 朱琳琳1, 倪蔡辉2
1 陕西科技大学资源与环境学院 西安 710021
2 南通新型建筑材料有限公司 南通 226299;
Microstructure and Properties for Composites of Graphene Oxide/Cement
Shenghua LV1(), Jia ZHANG1, Xiaoqian LUO1, Linlin ZHU1, Caihui NI2
1 College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
2 Nantong New Building Materials Co. Ltd., Nantong 226299, China;
引用本文:

吕生华, 张佳, 罗潇倩, 朱琳琳, 倪蔡辉. 氧化石墨烯/水泥基复合材料的微观结构和性能[J]. 材料研究学报, 2018, 32(3): 233-240.
Shenghua LV, Jia ZHANG, Xiaoqian LUO, Linlin ZHU, Caihui NI. Microstructure and Properties for Composites of Graphene Oxide/Cement[J]. Chinese Journal of Materials Research, 2018, 32(3): 233-240.

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摘要: 

对石墨进行氧化和超声分散制备了氧化石墨烯(GO)纳米片层分散液,GO纳米片层的厚度小于11.95 nm、平面尺寸为50~900 nm,结构中含有羟基、羰基和环氧基等化学基团。在水泥复合材料中掺入0.03%的GO纳米片层,水泥基复合材料在整体上形成了由多面体状晶体通过相互交织、贯穿、嵌入等方式构成的带有花型形貌的规整微观结构。这种结构使水泥基复合材料的28 d抗折强度和抗压强度分别比对照样品提高了76.2%和86.1%,水泥基体的孔隙率、平均孔径以及裂缝等明显减少。
关键词 ： 无机非金属材料,  氧化石墨烯,  水泥基复合材料,  水泥水化产物,  微观结构    
Abstract：

Graphene oxide (GO) nanosheets were prepared via oxidation treatment of graphite and then the dispersion liquid of which was prepared by ultrasound vibration in. The thickness and plane size of GO nanosheets are less than 11.95 nm and within 50~900 nm respectively. There are many chemical groups such as hydroxyl, carbonyl and epoxy groups on GO nanosheets. The prepared composite of graphene oxide/cement composited of ordinary cement and 0.03% GO nanosheets presents the regular micromorphology of ordinary cement, which consists of polyhedron-like cement hydration crystals by interweaving, penetrating and embedding each other. The compressive and flexural strength of the composite of GO/cement after curing for 28 days increase by 76.2% and 86.1% respectively, in comparison to that of the ordinary cement without GO addition, correspondingly the porosity and average pore diameter as well as cracks decrease obviously too.
Key words： inorganic non-metallic materials    graphene oxide    cement matrix    cement hydration products    microstructure
收稿日期: 2017-01-29     
ZTFLH:  TU528.572  
基金资助:国家自然科学基金(21276152)和陕西省科技统筹项目(2016KTCL01-14)
作者简介:

作者简介 吕生华,男,1963年生,博士
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https://www.cjmr.org/CN/10.11901/1005.3093.2016.679      或      https://www.cjmr.org/CN/Y2018/V32/I3/233

图1  石墨和GO的FTIR和XPS图谱
图2  GO纳米片层的AFM形貌和尺寸分布
图3  未掺入GO水泥基复合材料在28天时的SEM形貌
图4  掺有0.03%GO水泥复合材料28 d时SEM形貌
图5  在不同电压下测定的掺有0.03%GO的水泥复合材料28 d时的花状形貌
Component and content/%
C O Ca Al Si Mg Fe S
Control sample* 2.46 35.92 43.27 3.26 10.48 1.49 1.51 1.61
EDS1 7.07 34.91 38.97 3.49 9.06 3.59 1.68 1.21
EDS2 4.32 37.19 38.51 5.34 9.39 3.65 1.12 1.48
EDS3 7.46 31.57 39.28 5.26 9.49 2.49 1.10 1.35
EDS4 3.11 10.49 37.69 3.33 8.65 3.49 2.06 1.29
表1  水泥水化产物EDS检测结果
图6  水泥基复合材料的XRD图谱
Total pore area/m2g-1 Median pore diameter/nm Average pore diameter/nm Apparent density/gmL-1 Porosity/%
Control sample 26.3 35.4 43.5 2.31 35.52
GO/cement composites 12.6 15.3 16.2 2.45 11.38
表2  水泥基复合材料在28 d时的孔结构
GO dosage/% Compressive strength/MPa Flexural strength/MPa
3 d 7 d 28 d 60 d 3 d 7 d 28 d 60 d
0 21.8±1.1 30.4±1.4 43.6±1.1 45.3±1.0 2.8±0.14 5.6±0.2 8.2±0.4 9.2±0.5
0.03 32.7±1.3 51.8±1.5 77.5±1.8 79.6±1.9 5.6±0.2 8.5±0.4 15.7±0.6 16.2±0.6
表3  水泥基复合材料抗压和抗折强度
图7  GO调控水泥水化产物及微观结构机理(a)水化(b)GO模板成型(c)规整花型结构
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