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Modification of Talc@TiO2 toward high-performance nitrile rubber application
Chao He1, Lin Zhang1, Duoli Chen1
1Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University Chengdu 610031 China fxq@home.swjtu.edu.cn +86 028 87600128 +86 028 87600128.
Modified talcum powder (Talc) with nano-titania (TiO2) using coupling agents improves dispersion in polymers. These enhanced Talc@TiO2 particles boost rubber performance, offering better damping and impact resistance.
Area of Science:
- Materials Science
- Polymer Chemistry
- Nanotechnology
Background:
- Improving talcum powder (Talc) dispersion is crucial for polymer applications.
- Existing talc modifications may not sufficiently enhance dispersion and performance in specific polymers like carboxylated acrylonitrile-butadiene rubber (XNBR).
- Nano-titania (TiO2) offers potential for surface modification due to its properties.
Purpose of the Study:
- To enhance the dispersion of talcum powder (Talc) in polymer matrices.
- To prepare novel Talc@TiO2 hybrid particles using various coupling agents.
- To evaluate the dispersion and performance of modified Talc@TiO2 in XNBR.
Main Methods:
- Surface modification of nano-titania (TiO2) using silane (KH550), titanate (NDZ201), and sodium polyacrylate (PAAS) coupling agents.
- Adhesion of modified TiO2 onto Talc surfaces via ball milling to create Talc@TiO2 particles.
- Assessment of colloidal dispersion of Talc@TiO2 in anhydrous ethanol and evaluation of modified hybrid XNBR performance.
Main Results:
- Talc@TiO2 particles modified with PAAS and NDZ201 exhibited superior colloidal dispersion in ethanol compared to unmodified Talc and NDZ201-modified Talc@TiO2.
- The enhanced dispersion is attributed to organification and charge repulsion effects.
- Modified Talc@TiO2 hybrid XNBR demonstrated improved damping capacity and impact resistance.
Conclusions:
- Surface modification of talc with nano-titania using specific coupling agents significantly improves its dispersion in polymers.
- The improved dispersion and adhesion of modified Talc@TiO2 particles enhance the mechanical properties of XNBR.
- This approach offers a viable strategy for developing high-performance polymer composites.
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