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<p>In 2024, the <i>Sorghum</i> was identified as the fourth most produced agricultural crop in Mexico, reflecting its potential as a raw material for advanced applications. Starch, which represents nearly 60–70% of the grain, is the principal component and provides an excellent base for developing functional biopolymers. In this study, a composite aerogel derived from Sorghum starch, reinforced with green polypyrrole and chitosan was fabricated, followed by physicochemical characterization. The contact angle measurement reached 87°, suggesting moderate hydrophilicity of the material. Scanning Electron Microscopy (SEM) revealed a mesoporous structure with an average pore size of 0.283&#xa0;μm. The aerogel exhibited a swelling capacity of 4.25%, water solubility of 9.67%, and water uptake capacity of 374.6%. Thermogravimetric Analysis (TGA) indicated a maximum decomposition temperature of 320&#xa0;°C, confirming good thermal stability. Adsorption studies showed efficiencies of 56.4% for Pb(II), 36.6% for As(III), and 75.6% for Cu(II), determined using Inductively Coupled Plasma Spectroscopy.</p> Graphical abstract <p></p>

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Physicochemical analysis of a Sorghum bicolor (L.) Moench/polypyrrole/chitosan composite for potential use in water treatment

  • 期刊论文

  • 发表日期：

    2026年4月3日

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  • Alfredo Olarte Paredes,
  • David Alejandro Palacios Contreras,
  • Areli Marlen Salgado Delgado,
  • Cinthya Dinorah Arrieta González,
  • René Salgado Delgado,
  • Alien Blanco Flores

摘要

In 2024, the Sorghum was identified as the fourth most produced agricultural crop in Mexico, reflecting its potential as a raw material for advanced applications. Starch, which represents nearly 60–70% of the grain, is the principal component and provides an excellent base for developing functional biopolymers. In this study, a composite aerogel derived from Sorghum starch, reinforced with green polypyrrole and chitosan was fabricated, followed by physicochemical characterization. The contact angle measurement reached 87°, suggesting moderate hydrophilicity of the material. Scanning Electron Microscopy (SEM) revealed a mesoporous structure with an average pore size of 0.283 μm. The aerogel exhibited a swelling capacity of 4.25%, water solubility of 9.67%, and water uptake capacity of 374.6%. Thermogravimetric Analysis (TGA) indicated a maximum decomposition temperature of 320 °C, confirming good thermal stability. Adsorption studies showed efficiencies of 56.4% for Pb(II), 36.6% for As(III), and 75.6% for Cu(II), determined using Inductively Coupled Plasma Spectroscopy.

Graphical abstract