ICCAS OpenIR
Relationship between the continually expanded interlayer distance of layered silicates and excess intercalation of cationic surfactants
Zhao, ZF; Tang, T; Qin, YX; Huang, BT
2003-10-28
Source PublicationLANGMUIR
ISSN0743-7463
Volume19Issue:22Pages:9260-9265
AbstractExcess intercalation of cationic surfactants into Na-montmorillonites (MMTs) was investigated in organically modified silicates (OMSs), synthesized with MMTs and octadecylammonium chloride (OAC) by systematically varying the surfactant loading level from 0.625 to 1, 1.25, 1.56, 2, and 2.5 with respect to the cation exchange capacity (CEC) of MMTs. Wide-angle X-ray diffraction and thermogravimetric analysis results indicated that the continuous increase of interlayer distances came from the entering of surfactants into the interlayer of MMTs. Excess surfactants were extracted with a Soxhlet apparatus, which showed two kinds of intercalation states of surfactants in the interlayer when the surfactant loading level was beyond the CEC. Fourier transform infrared spectroscopy and differential scanning calorimetry were used to explore the microstructures of OMSs. It was found that the surfactants arranged more orderly as the loading level increased and the excess surfactants piled up in the interlayer together with counterions, forming a sandwiched surfactant layer. On the basis of the results, the layer structures of OMSs and the mechanism by which the surfactants entered the interlayer were expounded: surfactant cations entered the interlayer through cation exchange reactions and were tightly attracted to the silicate platelet surfaces when the surfactant loading level was below the CEC; however, excess cationic surfactants entered the interlayer together with counterions through hydrophobic bonding and formed a sandwiched layer in the interlayers, leading to a continuous increase of the interlayer distance, when the surfactant loading level was beyond the CEC.
DOI10.1021/la030056h
Indexed BySCI
Language英语
WOS IDWOS:000186177200026
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:48[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/81134
Collection中国科学院化学研究所
Corresponding AuthorTang, T
AffiliationChinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Zhao, ZF,Tang, T,Qin, YX,et al. Relationship between the continually expanded interlayer distance of layered silicates and excess intercalation of cationic surfactants[J]. LANGMUIR,2003,19(22):9260-9265.
APA Zhao, ZF,Tang, T,Qin, YX,&Huang, BT.(2003).Relationship between the continually expanded interlayer distance of layered silicates and excess intercalation of cationic surfactants.LANGMUIR,19(22),9260-9265.
MLA Zhao, ZF,et al."Relationship between the continually expanded interlayer distance of layered silicates and excess intercalation of cationic surfactants".LANGMUIR 19.22(2003):9260-9265.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zhao, ZF]'s Articles
[Tang, T]'s Articles
[Qin, YX]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhao, ZF]'s Articles
[Tang, T]'s Articles
[Qin, YX]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhao, ZF]'s Articles
[Tang, T]'s Articles
[Qin, YX]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.