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Steric stabilization of graphene oxide in alkaline cementitious solutions: Mechanical enhancement of cement composite
Lu, Zeyu; Hanif, Asad; Ning, Chao; Shao, Hongyu; Yin, Ran; Li, Zongjin
2017-08-05
Source PublicationMATERIALS & DESIGN
ISSN0264-1275
Volume127Pages:154-161
AbstractGraphene oxide (GO) with extraordinary properties has been regarded as a good candidate to reinforce cementitious materials. Due to a variety of oxygen functionalities, GO can be well dispersed in aqueous solutions but unstable in the presence of alkaline cementitious solutions, which restricts the fully utilization of GO to the mechanical enhancement of cementitious materials. In this study, a stabilized GO aqueous solution by pre adding polycarboxylate-ether (PCE) copolymer was obtained before mixing with cement. The experimental results indicated that PCE can significantly improve the dispersion and stability of GO in alkaline cementitious solutions due to the stronger steric repulsion and hydrogen bonding. However, GO suddenly agglomerated when it was firstly mixed with cement by a rapid physical and chemical interaction, and post-addition of PCE has negligible helps to de-flocculate the GO. In terms of mechanical properties, cement paste with the stabilized GO-PCE showed higher flexural and compressive strength in comparison to that without PCE due to the better dispersion of GO in the hardened cement matrix. In conclusion, the prerequisite to make GO contribute more to the mechanical enhancement of cement paste is to ensure the good dispersion of GO in alkaline cementitious solutions achieved by pre-adding PCE.
KeywordGraphene oxide (GO) Steric repulsion Cementitious materials Polycarboxylate-ether (PCE) Mechanical properties
DOI10.1016/j.matdes.2017.04.083
URLView the original
Indexed BySCI
Language英语
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000404500800017
PublisherELSEVIER SCI LTD
The Source to ArticleWOS
Fulltext Access
Citation statistics
Cited Times [WOS]:46   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Recommended Citation
GB/T 7714
Lu, Zeyu,Hanif, Asad,Ning, Chao,et al. Steric stabilization of graphene oxide in alkaline cementitious solutions: Mechanical enhancement of cement composite[J]. MATERIALS & DESIGN,2017,127:154-161.
APA Lu, Zeyu,Hanif, Asad,Ning, Chao,Shao, Hongyu,Yin, Ran,&Li, Zongjin.(2017).Steric stabilization of graphene oxide in alkaline cementitious solutions: Mechanical enhancement of cement composite.MATERIALS & DESIGN,127,154-161.
MLA Lu, Zeyu,et al."Steric stabilization of graphene oxide in alkaline cementitious solutions: Mechanical enhancement of cement composite".MATERIALS & DESIGN 127(2017):154-161.
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