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Modification of montmorillonite with aminopropylisooctyl polyhedral oligomeric silsequioxane
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Zhao, Feng, Wan, Chaoying, Bao, Xujin and Kandasubramanian, Bala (2009) Modification of montmorillonite with aminopropylisooctyl polyhedral oligomeric silsequioxane. Journal of Colloid and Interface Science, 333 (1). pp. 164-170. doi:10.1016/j.jcis.2009.02.014 ISSN 0021-9797.
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Official URL: http://dx.doi.org/10.1016/j.jcis.2009.02.014
Abstract
Sodium montmorillonite (Na-MMT) was modified with various amounts of aminopropylisooctyl polyhedral oligomeric silsequioxane (POSS) and a second surfactant (alkyl ammonium based) via ion-exchange reactions. Interlayer spacing, interlamellar structure, and thermal and surface properties of these organoclays were characterized by wide angle X-ray diffraction, thermogravimetric analysis, and contact angle measurement. The interlayer space of POSS-modified clay (POSS-MMT) was strongly dependent on the arrangement of POSS surfactant but less dependent on the POSS concentration. The sodium ions in Na-MMT were only partially exchanged by protonized POSS due to the steric hindrance effect. In addition, the dual-surfactant-modified clays exhibited increased exchange ratios by controlling the amount of the second surfactant, resulting in a good balance in hydrophobicity and polarity of the modified clays. The resultant organoclays were mixed with polypropylene (PP) via a melt-compounding method. It was found that the dual-surfactant-modified clays with low polarity and similar hydrophobicity to PP were well dispersed in the PP matrix.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||
Journal or Publication Title: | Journal of Colloid and Interface Science | ||||
Publisher: | Academic Press Inc. Elsivier Science | ||||
ISSN: | 0021-9797 | ||||
Official Date: | 2009 | ||||
Dates: |
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Volume: | 333 | ||||
Number: | 1 | ||||
Page Range: | pp. 164-170 | ||||
DOI: | 10.1016/j.jcis.2009.02.014 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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