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A simple method to improve the clarity and rheological properties of polymer/clay nanocomposites by using fractionated clay particles.
ACS Appl Mater Interfaces. 2009 Jan; 1(1):130-5.AA

Abstract

We present a simple method to improve the transparency and rheological properties of polystyrene/organoclay nanocomposites. Such composites are typically prepared using organophilic derivatives of commercial montmorillonite (MMT) clays that contain a wide range of particle sizes. Our approach is to fractionate the native MMT clay to exclude large aggregates and then modify the fractionated clay (FMT) by a surfactant treatment (the resulting organoclay is termed o-FMT). Polystyrene nanocomposites made from the o-FMT are then compared with those made from a commercial organoclay having the same surfactant treatment. The o-FMT-based composites exhibit much better rheological properties (e.g., their elastic moduli at low frequencies are approximately 10 times higher) at equivalent mass loadings. Moreover, the o-FMT-based materials also have better transparency: e.g., a 10% o-FMT sample transmits as much light as a sample with 5% commercial clay. Transmission electron microscopy confirms that these differences in properties are related to microstructural differences; i.e., large aggregates are generally absent in the o-FMT samples. Clay fractionation may thus be a general strategy to enhance the properties of polymer/clay nanocomposites.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Cipriano BH
Department of Chemical & Biomolecular Engineering, University of Maryland, College Park, Maryland 20742-2111, USA.
Kashiwagi T
No affiliation info available
Zhang X
No affiliation info available
Raghavan SR
No affiliation info available

MeSH

Aluminum SilicatesBentoniteClayGelsMicroscopy, Electron, TransmissionNanocompositesParticle SizePolymersRheologySpectrophotometryWaterX-Ray Diffraction

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

20355764

Citation

Cipriano, Bani H., et al. "A Simple Method to Improve the Clarity and Rheological Properties of Polymer/clay Nanocomposites By Using Fractionated Clay Particles." ACS Applied Materials & Interfaces, vol. 1, no. 1, 2009, pp. 130-5.
Cipriano BH, Kashiwagi T, Zhang X, et al. A simple method to improve the clarity and rheological properties of polymer/clay nanocomposites by using fractionated clay particles. ACS Appl Mater Interfaces. 2009;1(1):130-5.
Cipriano, B. H., Kashiwagi, T., Zhang, X., & Raghavan, S. R. (2009). A simple method to improve the clarity and rheological properties of polymer/clay nanocomposites by using fractionated clay particles. ACS Applied Materials & Interfaces, 1(1), 130-5. https://doi.org/10.1021/am8000693
Cipriano BH, et al. A Simple Method to Improve the Clarity and Rheological Properties of Polymer/clay Nanocomposites By Using Fractionated Clay Particles. ACS Appl Mater Interfaces. 2009;1(1):130-5. PubMed PMID: 20355764.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A simple method to improve the clarity and rheological properties of polymer/clay nanocomposites by using fractionated clay particles. AU - Cipriano,Bani H, AU - Kashiwagi,Takashi, AU - Zhang,Xin, AU - Raghavan,Srinivasa R, PY - 2010/4/2/entrez PY - 2009/1/28/pubmed PY - 2010/5/5/medline SP - 130 EP - 5 JF - ACS applied materials & interfaces JO - ACS Appl Mater Interfaces VL - 1 IS - 1 N2 - We present a simple method to improve the transparency and rheological properties of polystyrene/organoclay nanocomposites. Such composites are typically prepared using organophilic derivatives of commercial montmorillonite (MMT) clays that contain a wide range of particle sizes. Our approach is to fractionate the native MMT clay to exclude large aggregates and then modify the fractionated clay (FMT) by a surfactant treatment (the resulting organoclay is termed o-FMT). Polystyrene nanocomposites made from the o-FMT are then compared with those made from a commercial organoclay having the same surfactant treatment. The o-FMT-based composites exhibit much better rheological properties (e.g., their elastic moduli at low frequencies are approximately 10 times higher) at equivalent mass loadings. Moreover, the o-FMT-based materials also have better transparency: e.g., a 10% o-FMT sample transmits as much light as a sample with 5% commercial clay. Transmission electron microscopy confirms that these differences in properties are related to microstructural differences; i.e., large aggregates are generally absent in the o-FMT samples. Clay fractionation may thus be a general strategy to enhance the properties of polymer/clay nanocomposites. SN - 1944-8244 UR - https://www.unboundmedicine.com/medline/citation/20355764/A_simple_method_to_improve_the_clarity_and_rheological_properties_of_polymer/clay_nanocomposites_by_using_fractionated_clay_particles_ L2 - https://doi.org/10.1021/am8000693 DB - PRIME DP - Unbound Medicine ER -