Surface Modification of Sepiolite in Aqueous Gels by Using Methoxysilanes and Its Impact on the Nanofiber Dispersion Ability

被引：73

作者：

Garcia, Nuria ^{[1
]}

Guzman, Julio ^{[1
]}

Benito, Esperanza ^{[1
]}

Esteban-Cubillo, Antonio ^{[2
]}

Aguilar, Eduardo ^{[2
]}

Santaren, Julio ^{[2
]}

Tiemblo, Pilar ^{[1
]}

机构：

[1] CSIC, Inst Ciencia & Tecnol Polimeros, E-28006 Madrid, Spain

[2] Tolsa SA, R&D Dept, Madrid 28031, Spain

来源：

LANGMUIR | 2011年 / 27卷 / 07期

关键词：

SILICATES; NANOPARTICLES; DERIVATIVES; ADSORPTION; ACID;

D O I：

10.1021/la104410r

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Surface modification reactions on needle-like sepiolite using alkyl and functional silanes have been carried out in the form of aqueous gels. In contrast with modifications in organic solvents, reactions in water make it possible to modify the surface of almost-individual sepiolite fibers and produce either a continuous coating or a nanotexturization of the sepiolite fiber surface, depending on the reaction conditions. This clean procedure substitutes advantageously organic solvent surface modifications and allows the tuning of surface properties such as specific surface area, wetting behavior, and chemical functionalization. A consequence of such tuning is, for example, the excellent dispersion of modified sepiolite nanofibers in a great variety of polymers by routine compounding and processing techniques.

引用

页码：3952 / 3959

页数：8

共 31 条

[1] FTIR and zeta potential measurements of sepiolite treated with some organosilanes [J].

Alkan, M ;

Tekin, G ;

Namli, H .

MICROPOROUS AND MESOPOROUS MATERIALS, 2005, 84 (1-3) :75-83

[2]

Alvarez-Berenguer A., 1981, United States Patent, Patent No. [US4302594 A, 4302594]

[3]

ALVAREZBERENGUER A, 1990, Patent No. 0170299

[4] Titania-Sepiolite nanocomposites prepared by a surfactant templating colloidal route [J].

Aranda, Pilar ;

Kun, Robert ;

Martin-Luengo, M. Angeles ;

Letaief, Sadok ;

Dekany, Imre ;

Ruiz-Hitzky, Eduardo .

CHEMISTRY OF MATERIALS, 2008, 20 (01) :84-91

[5] MECHANISM OF THE GRAFTING OF ORGANOSILANES ON MINERAL SURFACES .4. PHENYLDERIVATIVES OF SEPIOLITE AND POLY(ORGANOSILOXANES) [J].

AZNAR, AJ ;

SANZ, J ;

RUIZHITZKY, E .

COLLOID AND POLYMER SCIENCE, 1992, 270 (02) :165-176

[6] Preparation and Characterization of Sepiolite-Poly(ethyl methacrylate) and Poly(2-hydroxyethyl methacrylate) Nanocomposites [J].

Benlikaya, Ruhan ;

Alkan, Mahir ;

Kaya, Ismet .

POLYMER COMPOSITES, 2009, 30 (11) :1585-1594

[7] Sepiolite needle-like clay for PA6 nanocomposites: An alternative to layered silicates? [J].

Bilotti, E. ;

Zhang, R. ;

Deng, H. ;

Quero, F. ;

Fischer, H. R. ;

Peijs, T. .

COMPOSITES SCIENCE AND TECHNOLOGY, 2009, 69 (15-16) :2587-2595

[8] Fibre reinforcement of elastomers: nanocomposites based on sepiolite and poly(hydroxyethyl acrylate) [J].

Bokobza, L ;

Burr, A ;

Garnaud, G ;

Perrin, MY ;

Pagnotta, S .

POLYMER INTERNATIONAL, 2004, 53 (08) :1060-1065

[9] Use of organo- and alkoxysilanes in the synthesis of grafted and pristine clays [J].

Carrado, KA ;

Xu, LQ ;

Csencsits, R ;

Muntean, JV .

CHEMISTRY OF MATERIALS, 2001, 13 (10) :3766-3773

[10] Heavy metal adsorption by functionalized clays [J].

Celis, R ;

Hermosín, MC ;

Cornejo, J .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2000, 34 (21) :4593-4599

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