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<p>Dendrimers are promising advanced materials due to their unique multifunctionality, and wide range of potential applications. In this study, dendrimers were synthesized using polyethylene glycol diacid (PEG 600) as core and citric acid as the branching units up to the second generation. Different molar ratios (1:1, 1:2) and stirring speeds (400, 500, 600&#xa0;rpm) were evaluated and we explore the possibility of PEG/CA dendrimers as adsorbents. Dendrimers were characterized physiochemically by Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and Nuclear magnetic resonance (<sup>1</sup>HNMR). FTIR confirmed the presence of growing functional groups in each sample, and the successful formation of ester bonds. In thermal gravimetric analysis (TGA) of resulted in CA temperatures from 150 to 210&#xa0;°C and 380 to 410&#xa0;°C ones for PEG diacid. <sup>1</sup>HNMR confirmed the presence of signal characteristic for the dendrimer. The studies suggest the concentration is an important variable for the synthesis more than the stirring speed.</p> Graphic Abstract <p></p>

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Synthesis and characterization of dendrimers from agro-industrial waste (citric acid) and polyethylene glycol diacid (CA/PEG-diacid)

  • 期刊论文

  • 发表日期：

    2025年12月19日

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  • René Salgado-Delgado,
  • Melissa Santos-Garduño,
  • Areli Marlen Salgado-Delgado,
  • Manuel Jesús Granados-Baeza,
  • Alfredo Olarte-Paredes,
  • Brenda Jatziri Vergara-Salgado,
  • Efraín Rubio-Rosas,
  • Gerardo Cedillo-Valverde

摘要

Dendrimers are promising advanced materials due to their unique multifunctionality, and wide range of potential applications. In this study, dendrimers were synthesized using polyethylene glycol diacid (PEG 600) as core and citric acid as the branching units up to the second generation. Different molar ratios (1:1, 1:2) and stirring speeds (400, 500, 600 rpm) were evaluated and we explore the possibility of PEG/CA dendrimers as adsorbents. Dendrimers were characterized physiochemically by Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and Nuclear magnetic resonance (1HNMR). FTIR confirmed the presence of growing functional groups in each sample, and the successful formation of ester bonds. In thermal gravimetric analysis (TGA) of resulted in CA temperatures from 150 to 210 °C and 380 to 410 °C ones for PEG diacid. 1HNMR confirmed the presence of signal characteristic for the dendrimer. The studies suggest the concentration is an important variable for the synthesis more than the stirring speed.

Graphic Abstract