Size-controlled self-assembly of anisotropic sepiolite fibers in rubber nanocomposites
| Autor: | Luciano Tadiello, Franca Morazzoni, Barbara Di Credico, Emanuela Callone, Lucia Conzatti, E Cobani, Sandra Dirè, T Hanel, Davide Cristofori, Luca Giannini, Paola Stagnaro, Massimiliano D’Arienzo, Roberto Scotti |
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| Přispěvatelé: | Di Credico, B, Cobani, E, Callone, E, Conzatti, L, Cristofori, D, D'Arienzo, M, Dirã, S, Giannini, L, Hanel, T, Scotti, R, Stagnaro, P, Tadiello, L, Morazzoni, F |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Polymer nanocomposite
Composite number Sepiolite 020101 civil engineering 02 engineering and technology 0201 civil engineering Natural rubber Geochemistry and Petrology Polymer chemistry Organoclay Composite material chemistry.chemical_classification Filler networking Nanocomposite Geology Polymer Self-assembly 021001 nanoscience & nanotechnology Rubber nanocomposite chemistry visual_art Nanofiber visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Applied clay science 152 (2018): 51–64. doi:10.1016/j.clay.2017.10.032 info:cnr-pdr/source/autori:Di Credico B.; Cobani E.; Callone E.; Conzatti L.; Cristofori D.; D'Arienzo M.; Dire S.; Giannini L.; Hanel T.; Scotti R.; Stagnaro P.; Tadiello L.; Morazzoni F./titolo:Size-controlled self-assembly of anisotropic sepiolite fibers in rubber nanocomposites/doi:10.1016%2Fj.clay.2017.10.032/rivista:Applied clay science (Print)/anno:2018/pagina_da:51/pagina_a:64/intervallo_pagine:51–64/volume:152 |
| Popis: | The development of advanced polymer nanocomposites requires a strong filler-polymer interfacial interaction and an optimal filler nanodispersion. The incorporation of the clays into a polymer matrix frequently does not improve the composite mechanical properties, owing to both poor dispersion and macroscopic particle dimensions. In this work, pristine and organically-modified sepiolites (Sep) were structurally modified by an acid treatment, which provides nano-sized sepiolite (NS-Sep) fibers with reduced particle size and increased silanol groups on the surface layer. NS-Sep fibers were used to prepare styrene-butadiene rubber nanocomposites with enhanced mechanical properties. Dynamic-mechanical analysis of clay polymer nanocomposites demonstrated that the NS-Sep fibers provided an excellent balance between reinforcing and hysteretic behavior, compared to the large-sized pristine Sep and isotropic silica. This was related to the enhanced interfacial chemical interaction between NS-Sep and rubber, as well as to the size and self-assembly of anisotropic nanofibers to form filler network structures, as supported by transmission electron microscopy analysis. The preparation of nanocomposites, based on Sep nanofibers obtained by a simple and versatile acid treatment, can thus be considered an alternative approach for the designing of advanced clay polymer nanocomposites. |
| Databáze: | OpenAIRE |
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