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Shape Memory Polymers for Active Cell Culture
Published on: July 4, 2011
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Tunable shape memory behavior of polymer with surface modification of nanoparticles
Arpan Biswas1, Vinod K Aswal2, Pralay Maiti1
1School of Materials Science and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi 221 005, India.
Journal of Colloid and Interface Science
|August 25, 2019
Summary
Organically modified nanoclays enhance polyurethane nanocomposite dispersion and shape memory properties. These modified nanocomposites show superior biomaterial characteristics, including better cell adhesion and biodegradability for biomedical applications.
Area of Science:
- Materials Science
- Polymer Science
- Biomaterials Engineering
Background:
- Nanoclay dispersion in polymer matrices is influenced by nanoclay surface modification.
- Organically modified nanoclays exhibit better intercalation with polymer chains compared to pristine nanoclays.
- This affects the overall properties of the resulting nanocomposites.
Purpose of the Study:
- To investigate the effect of nanoclay surface modification on the dispersion and properties of polyurethane nanocomposites.
- To evaluate the shape memory behavior and biomaterial characteristics of these nanocomposites.
- To correlate structural changes with observed property variations.
Main Methods:
- In-situ synthesis of polyurethane nanocomposites with pristine and organically modified nanoclays.
- Spectroscopic measurements to analyze nanoclay-polymer interactions and crystallinity.
- Shape memory behavior testing at physiological temperature (37°C).
- Temperature-dependent nanostructure analysis.
- Cell culture studies (cell adhesion, viability, fluorescence imaging) to assess biomaterial suitability.
Main Results:
- Organically modified nanoclays led to improved dispersion and higher nanoclay-polymer interaction.
- Modified nanoclay nanocomposites showed significantly decreased crystallinity and enhanced shape memory behavior.
- Unmodified nanoclays resulted in poorer dispersion, lower interaction, and diminished shape memory properties.
- Nanocomposites with modified nanoclays demonstrated superior cell adhesion and viability, indicating better biocompatibility.
- Enhanced biodegradability was observed in modified nanocomposites.
Conclusions:
- Surface modification of nanoclays is crucial for achieving optimal dispersion and properties in polyurethane nanocomposites.
- Organically modified nanoclays significantly improve shape memory performance and biomaterial characteristics.
- These findings highlight the potential of modified nanoclay-polyurethane nanocomposites for advanced biomedical applications.
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