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<p>Tyre industry has already become a part of journey of sustainability and circular economy since last few years. To stay with this journey, it is becoming essential to incorporate and increase the use of recycled carbon black (CB) in the new product with time. Simultaneously, it is necessary to ascertain the type of CB before it goes into the compound to guarantee the desired service property. With this aim, herein, a methodology has been explored not only to produce high quality recovered carbon black (RCB) from a rubber product but also to unlock a transmission electron microscopic (TEM) technique to decode the series of CB (ASTM grade), based on their primary particle size. The recovery includes an optimized pyrolysis-based technique performed at 550&#xa0;°C in argon atmosphere with a following acid wash to ensure a undeteriorated and metal oxide free CB yield. The particle size analysis reveals that CB from each representative series yields a distribution curve with a characteristic mean diameter value which easily differentiates the CB from each other. Moreover, the STEM-mapping tool has been utilized critically to spot out CB particles even in the presence of spherical silica particle which is widely used as a co-filler in the tyre compound along with CB. Eventually, this technique will help in shifting the gear towards the usage of good quality RCB, collected from end-of-life tyre, in the new product, minimizing the usage of newly procured black.</p>

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Unlocking Recycled Carbon Black Type Through Transmission Electron Microscopy Recovered from End-of-Life Rubber Product

  • 期刊论文

  • 发表日期：

    2025年9月8日

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  • Abhisek Brata Ghosh,
  • Kanhaiya Lal Anjana,
  • Tuhin Dolui,
  • Jagannath Chanda,
  • Hirak Satpathi,
  • Amit Kumar Sen,
  • Barun Kumar Samui,
  • Prasenjit Ghosh,
  • Rabindra Mukhopadhyay

摘要

Tyre industry has already become a part of journey of sustainability and circular economy since last few years. To stay with this journey, it is becoming essential to incorporate and increase the use of recycled carbon black (CB) in the new product with time. Simultaneously, it is necessary to ascertain the type of CB before it goes into the compound to guarantee the desired service property. With this aim, herein, a methodology has been explored not only to produce high quality recovered carbon black (RCB) from a rubber product but also to unlock a transmission electron microscopic (TEM) technique to decode the series of CB (ASTM grade), based on their primary particle size. The recovery includes an optimized pyrolysis-based technique performed at 550 °C in argon atmosphere with a following acid wash to ensure a undeteriorated and metal oxide free CB yield. The particle size analysis reveals that CB from each representative series yields a distribution curve with a characteristic mean diameter value which easily differentiates the CB from each other. Moreover, the STEM-mapping tool has been utilized critically to spot out CB particles even in the presence of spherical silica particle which is widely used as a co-filler in the tyre compound along with CB. Eventually, this technique will help in shifting the gear towards the usage of good quality RCB, collected from end-of-life tyre, in the new product, minimizing the usage of newly procured black.