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<p>Bio-based elastomers have emerged as a sustainable alternative to petroleum-derived synthetic polymers across a wide range of applications. Despite substantial progress in the development of bio-derived materials, achieving bio-based elastomers with inherent degradability and competent mechanical performance as of commercial elastomers remains a significant challenge. To this end, this report presents a novel bio-based elastomers exhibiting various traits of conventional silicones yet degradable when desired. Epoxidized castor oil was polymerized with maleic acid to obtain flexible and biocompatible elastomeric materials. Material properties such as glass transition temperature and Young’s modulus can be modulated with the variation in epoxy content. The prepared elastomers showed appreciable swelling in organic solvents and excellent hydrophobicity as measured via contact angle measurements. The potential for food‑packaging applications was demonstrated by using the prepared elastomers as a coating on paper backing material. Besides, the MTT assay (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) was demonstrated to show their biocompatibility and potential of these elastomers in biomedical applications. Finally, aiming towards a suitable end-of-life solution, the degradation of the elastomers in aqueous sodium hydroxide was demonstrated. Overall, the presented bio-based elastomers prepared using castor oil provide a promising sustainable alternative to conventional, nonrecyclable elastomers for applications such as adhesives and packaging materials.</p> Graphical Abstract <p></p>

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Castor oil and maleic acid-derived elastomers: towards the bio-derived, biocompatible, degradable alternative of the conventional elastomer

  • 期刊论文

  • 发表日期：

    2026年5月28日

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  • Nitin Kumar Sharma,
  • Yasmeena Ashraf,
  • Ekta Srivastava,
  • Vatsalya Gupta,
  • Ramkrishna Sarkar,
  • Ashok Kumar,
  • Animangsu Ghatak

摘要

Bio-based elastomers have emerged as a sustainable alternative to petroleum-derived synthetic polymers across a wide range of applications. Despite substantial progress in the development of bio-derived materials, achieving bio-based elastomers with inherent degradability and competent mechanical performance as of commercial elastomers remains a significant challenge. To this end, this report presents a novel bio-based elastomers exhibiting various traits of conventional silicones yet degradable when desired. Epoxidized castor oil was polymerized with maleic acid to obtain flexible and biocompatible elastomeric materials. Material properties such as glass transition temperature and Young’s modulus can be modulated with the variation in epoxy content. The prepared elastomers showed appreciable swelling in organic solvents and excellent hydrophobicity as measured via contact angle measurements. The potential for food‑packaging applications was demonstrated by using the prepared elastomers as a coating on paper backing material. Besides, the MTT assay (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) was demonstrated to show their biocompatibility and potential of these elastomers in biomedical applications. Finally, aiming towards a suitable end-of-life solution, the degradation of the elastomers in aqueous sodium hydroxide was demonstrated. Overall, the presented bio-based elastomers prepared using castor oil provide a promising sustainable alternative to conventional, nonrecyclable elastomers for applications such as adhesives and packaging materials.

Graphical Abstract