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<p>Bioplastics are an alternative to conventional plastics that are more environmentally friendly. In this study, bioplastics were prepared using a mixture of cassava peel starch and carboxymethyl cellulose (CMC), plasticized with glycerol. The bioplastic production method employed a casting solution in which the optimal composition of starch-CMC (97/3) was mixed with glycerol. The molecular vibration study by infrared analysis confirmed that starch was successfully isolated from cassava peel. The bioplastic with a starch ratio of 97:3 and an addition of 10% glycerol was selected as the optimal condition, yielding a tensile strength of 81.35&#xa0;MPa, an elongation value of 14.52%, and a Young's modulus of 56.67 MPa. Moreover, the addition of 10 wt% glycerol resulted in a 73.45% enhancement in the crystallinity index of the bioplastics. The plasticizing effect of glycerol on the starch/CMC (97/3) bioplastic was found to enhance the initial thermal decomposition temperature (T<sub>onset</sub>), observed at 291.77°C. The starch/CMC plasticized with 10 wt% glycerol (97/3) exhibited a rough and overlapping surface. The biodegradation percentage for this optimal composition also indicates that bioplastics can easily decompose in the environment.</p>

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Physical performance of glycerol-plasticized cassava peel starch-carboxymethyl cellulose bioplastic

  • 期刊论文

  • 发表日期：

    2025年2月25日

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  • Anisah Nur Fauziah,
  • Risda Adriana,
  • Atika Trisna Hayati,
  • Anita Marlina,
  • Yustinah,
  • Sun Theo Constan Lotebulo Ndruru

摘要

Bioplastics are an alternative to conventional plastics that are more environmentally friendly. In this study, bioplastics were prepared using a mixture of cassava peel starch and carboxymethyl cellulose (CMC), plasticized with glycerol. The bioplastic production method employed a casting solution in which the optimal composition of starch-CMC (97/3) was mixed with glycerol. The molecular vibration study by infrared analysis confirmed that starch was successfully isolated from cassava peel. The bioplastic with a starch ratio of 97:3 and an addition of 10% glycerol was selected as the optimal condition, yielding a tensile strength of 81.35 MPa, an elongation value of 14.52%, and a Young's modulus of 56.67 MPa. Moreover, the addition of 10 wt% glycerol resulted in a 73.45% enhancement in the crystallinity index of the bioplastics. The plasticizing effect of glycerol on the starch/CMC (97/3) bioplastic was found to enhance the initial thermal decomposition temperature (Tonset), observed at 291.77°C. The starch/CMC plasticized with 10 wt% glycerol (97/3) exhibited a rough and overlapping surface. The biodegradation percentage for this optimal composition also indicates that bioplastics can easily decompose in the environment.