|Table of Contents|

[1] Guo Liping, , Wang Hong, et al. Dispersion of graphene in silane coupling agent aqueous solutions [J]. Journal of Southeast University (English Edition), 2020, 36 (1): 67-72. [doi:10.3969/j.issn.1003-7985.2020.01.009]

Dispersion of graphene in silane coupling agent aqueous solutions()

Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

2020 1
Research Field:
Materials Sciences and Engineering
Publishing date:


Dispersion of graphene in silane coupling agent aqueous solutions
Guo Liping1 2 3 Wang Hong1 Chen Bo4 Qian Wenxun4
1 School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
2 Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjing 211189, China
3 Collaborative Innovation Centre for Advanced Civil Engineering Materials, Southeast University, Nanjing 211189, China
4 State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China
graphene silane coupling agent surface modification dispersibility
In order to reduce the agglomeration of nanographene and improve its dispersibility, six silane coupling agents were used to modify the surface of the nanographene particles. Visual inspection, Fourier-transform infrared spectroscopy, transmission electron microscopy, Raman spectroscopy, and X-ray diffraction were employed to evaluate the dispersion properties of the resulting graphene in an aqueous solution of silane coupling agents. Results show that all six types of silane coupling agents are efficient in promoting the dispersion of graphene in aqueous solutions, and no obvious sedimentation of the graphene dispersion solution is observed after a stationary storage period of 30 d. Taking 3-aminopropyltriethoxysilane(KH-550)as an example, after the graphene is dispersed in the KH-550 aqueous solution, the carboxyl group on the surface of the graphene reacts with the KH-550 amino group to form an amide bond, and KH-550 is successfully grafted onto the graphene surface. Polar functional groups ionize in water, creating an electrostatic repulsion effect, or hydrophilic functional groups form hydrogen bonds with water molecules, which is believed to improve the dispersion stability of graphene. The dispersed graphene is curled and contains many folds. Each fold has about three or four layers, with an interlayer spacing of about 0.65 nm. The dispersed graphene also has a complete lattice and a reduced number of defects. Nanographene disperses well in silane coupling agent aqueous solutions and can, therefore, be used to prepare cement-based composites.


[1] Guo K, Ma H H, Wang Q. Effect of graphene oxide on interfacial transition zone of recycled concrete[J]. Journal of Architecture and Civil Engineering, 2018, 35(5): 217-224.(in Chinese)
[2] Lü S H, Ding H D, Sun T, et al. Effect of naphthalene superplasticizer/graphene oxide composite on microstructure and mechanical properties of hardened cement paste[J]. Journal of Shaanxi University of Science & Technology(Natural Science Edition), 2014, 32(5): 42-47.(in Chinese)
[3] Yang Y L, Yuan X Y, Shen X, et al. Research on the corrosion resistance of graphene oxide on cement mortar[J]. Journal of Functional Materials, 2017, 48(5): 5144-5148.(in Chinese)
[4] Zhang Y M, Yu L H. Mechano-electric effect of steel fiber and graphene reinforced conductive concrete during flexural process[J]. Concrete, 2016(2): 52-55, 59.(in Chinese)
[5] Lei B, Zou J, Rao C H, et al. Experimental study on modification of recycled concrete with graphene oxide[J]. Journal of Building Structures, 2016, 37(S2): 103-108. DOI:10.14006/j.jzjgxb.2016.s2.015. (in Chinese)
[6] Lü S H, Ma Y J, Qiu C C, et al. Study on reinforcing and toughening of graphene oxide to cement-based composites[J]. Journal of Functional Materials, 2013, 44(15): 2227-2231.(in Chinese)
[7] Li X Y, Korayem A H, Li C Y, et al. Incorporation of graphene oxide and silica fume into cement paste: A study of dispersion and compressive strength[J]. Construction and Building Materials, 2016, 123: 327-335. DOI:10.1016/j.conbuildmat.2016.07.022.
[8] Gao D G, Ma Y J. Preparation and properties of copolymer of graphene oxide and monomers of polycarboxylate superplasticizer[J]. Fine Chemicals, 2015, 32(1): 103-107, 120. DOI:10.13550/j.jxhg.2015.01.021. (in Chinese)
[9] Zhao L, Guo X L, Ge C, et al. Mechanical behavior and toughening mechanism of polycarboxylate superplasticizer modified graphene oxide reinforced cement composites[J].Composites Part B: Engineering, 2017, 113: 308-316. DOI:10.1016/j.compositesb.2017.01.056.
[10] Li D, Müller M B, Gilje S, et al. Processable aqueous dispersions of graphene nanosheets[J].Nature Nanotechnology, 2008, 3(2): 101-105. DOI:10.1038/nnano.2007.451.
[11] Chuah S, Li W G, Chen S J, et al. Investigation on dispersion of graphene oxide in cement composite using different surfactant treatments[J].Construction and Building Materials, 2018, 161: 519-527. DOI:10.1016/j.conbuildmat.2017.11.154.
[12] Xu P J, Yan X T, Cong P L, et al. Silane coupling agent grafted graphene oxide and its modification on polybenzoxazine resin[J].Composite Interfaces, 2016, 24(7): 635-648. DOI:10.1080/09276440.2017.1254989.
[13] Zhang X Y, Shen H F, Huang H, et al. Novel progress of application and surface-modification technique for nano-particles materials[J]. Journal of Materials Engineering, 2005, 33(10): 58-63.(in Chinese)
[14] Guo L P, Lei D Y, Chen B, et al. Surface modification and dispersibility evaluation of silica fume[J]. Surface Technology, 2018, 47(7): 146-151. DOI:10.16490/j.cnki.issn.1001-3660.2018.07.020. (in Chinese)
[15] Fu L L. Analysis and detection technology of polymer materials[M].Beijing: Chemical Industry Press, 2014:50-65.
[16] Pan Z, He L, Qiu L, et al. Mechanical properties and microstructure of a graphene oxide-cement composite[J].Cement and Concrete Composites, 2015, 58: 140-147. DOI:10.1016/j.cemconcomp.2015.02.001.


Biography: Guo Liping(1979—), female, doctor, associate professor, guoliping691@163.com.
Foundation items: The National Key R& D Program of China(No. 2018YFC0406701), the National Natural Science Foundation of China(No. 51778133, 51739008).
Citation: Guo Liping, Wang Hong, Chen Bo, et al.Dispersion of graphene in silane coupling agent aqueous solutions[J].Journal of Southeast University(English Edition), 2020, 36(1):67-72.DOI:10.3969/j.issn.1003-7985.2020.01.009.
Last Update: 2020-03-20