Nanocomposites Analysis
Due to the increasing interest in nanocomposites, the molecular characterization of these materials is crucial for understanding their properties and developing new materials. Spectroscopic techniques that provide information at the molecular level cannot be avoided when characterizing polymers, fillers, and composites. Nuclear magnetic resonance (NMR) spectroscopy is an extremely important technique in the characterization of polymers and their nanocomposites.
As an expert in the field of nuclear magnetic resonance, Creative Biostructure provides customers with filler dispersion, functionalization, interfacial interactions, and more that exist in nanocomposites through NMR technology.
Figure 1. Polymer nanocomposites. (Lepcio et al., 2018)
Our Technology
Deuteron (2H) NMR can be used for molecular processes in functional polymers.
Solid state NMR enters the polymer body through a 13C cross-polarization (CP) magic angle spin (MAS) method.
The concept of two-dimensional (2D) NMR makes it possible to quantitatively study the intermolecular spin-spin distance and molecular redirection of naturally rich nuclei such as 12C, 15N, or 31P.
One of the main advantages of solid-state NMR is that it allows analysis of the polymer filler interface due to the sensitivity of the NMR spectrum and relaxation parameters on the local and segmental molecular motion of the polymer chain. Polymer filler interactions typically contribute to the formation of adsorption layers, where chain motion is more restricted than chain motion in the bulk, and solid-state NMR has been shown to distinguish polymer behavior in the interface region from polymer behavior in the bulk.
Our Services
Dynamic analysis of polymer chains in composite materials.
Molecular motion analysis.
Phase structure analysis of multiphase materials.
Analysis of residual dipole interactions in transverse relaxation and entanglement nanocomposites.
Analysis of orientation and distance dependence of spin interaction.
Analysis of relaxation phenomena in molecular rotation, chemical structure, and conformational changes in materials.
Analysis of the effect of paramagnetic effect on pelaxation.
Analysis of the Interaction between polymer and filler.
Morphological analysis of polymer nanocomposites.
Analysis of Elastomer Nanocomposites
NMR is a very useful and necessary technique for exploring the mobility of polymers around fillers, as glass bridges may be formed between polymer layers with filler particles to regulate the behavior of nanocomposites.
| Methods | Information that can be obtained |
|---|---|
| Solid-echo | Polymer mobility in nanocomposites with rigid polymer components. |
| Hahn echo pulse sequence | Polymer mobility in nanocomposites with movable polymer components. |
| The magic-sandwich echo | Study polymer relaxation, especially at short time scales (<0.2 ms). |
| Multiple quantum | It can provide quantitative information on cross-linking and/or entanglement that limits segment mobility at a time scale of 0.1 to 3 milliseconds, and determine residual dipole coupling and local dynamic order parameters. |
| MQNMR | Determining the crosslinking density and uniformity of nanocomposites is helpful for a comprehensive investigation of the filler distribution within the matrix. |
Analysis of Thermoplastic Nanocomposites
In the case of polymer clay nanocomposites, we can provide information about polymer surfactant clay interactions, polymer chain conformation and mobility, polymer chain length, properties of the head group, and the structure and charge of minerals through NMR. The paramagnetic effect of clay structural ions also affects the dispersion of clay and thus its characterization.
Creative Biostructure is committed to providing high-quality NMR analysis services to advance the life sciences fields. If you have any questions or needs, please contact us and our customer service staff will help you the first time.
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Reference
- Lepcio P, et al. Bulk polymer nanocomposites with preparation protocol governed nanostructure: The origin and properties of aggregates and polymer bound clusters. Soft Matter. 2018, 14(11): 2094-2103.
