UM
Determination of adsorption mechanism of polycarboxylate-ether based superplasticizers using crystallization, thermal and mass spectrometry methods
Sun G.1; Wang L.3; Weng L.-T.1; Zhang J.1; Li Z.1; Chen G.2
2014
Source PublicationRSC Advances
ISSN20462069
Volume4Issue:49Pages:25479-25485
AbstractIn this study, a series of suspensions were fabricated by dispersing calcium carbonate (CaCO), cement and silica fume into a polycarboxylate-ether plasticizer (PCE)/water solution. The PCE used was a comb-like copolymer containing a sodium polymethacrylate (PMA) backbone partially esterified with polyethyleneglycol (PEG) side chains. Sedimentation and optical microscopy tests indicated that both CaCO and cement could form homogeneous suspensions. The crystallization behavior of the PEG side chains revealed that PEG had stronger interactions with CaCO than with cement and silica fume particles, which was further confirmed by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). A detailed time-of-flight secondary ion mass spectrometry (ToF-SIMS) examination suggested that PEG was mainly located on the surfaces of the CaCO, and the PMA backbones were mainly located on the surfaces of the cement and silica fume, respectively. The different interactions between copolymer and inorganic particles were associated with their interfacial tensions, and had a remarkable influence on the paste fluidity. © the Partner Organisations 2014.
DOI10.1039/c4ra02362e
URLView the original
Language英語
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Cited Times [WOS]:14   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Hong Kong University of Science and Technology
2.Beijing National Laboratory for Molecular Sciences
3.China Building Materials Academy
Recommended Citation
GB/T 7714
Sun G.,Wang L.,Weng L.-T.,et al. Determination of adsorption mechanism of polycarboxylate-ether based superplasticizers using crystallization, thermal and mass spectrometry methods[J]. RSC Advances,2014,4(49):25479-25485.
APA Sun G.,Wang L.,Weng L.-T.,Zhang J.,Li Z.,&Chen G..(2014).Determination of adsorption mechanism of polycarboxylate-ether based superplasticizers using crystallization, thermal and mass spectrometry methods.RSC Advances,4(49),25479-25485.
MLA Sun G.,et al."Determination of adsorption mechanism of polycarboxylate-ether based superplasticizers using crystallization, thermal and mass spectrometry methods".RSC Advances 4.49(2014):25479-25485.
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