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      https://www.ias.ac.in/article/fulltext/boms/042/03/0116

    • Keywords

       

      Composite materials; galactomannan; zinc hydroxide; green synthesis; antibacterial activity.

    • Abstract

       

      In this work, the preparation of an antibacterial galactomannan/Zn(OH)$_2$–ZnO composite material by a greenprocess is proposed and demonstrated. The galactomannan polysaccharide was extracted from the arid-native mesquite (Prosopis spp.) seeds through a hydrothermal technique, and it was used as an organic polymeric matrix for the in situ chemical precipitation of the Zn(OH)$_2$–ZnO inorganic particles from simple reactions between Zn$^{2+}$ and NaOH. Thepreparation was performed under standard conditions in aqueous solutions. The composite material, which was obtained by centrifugation of the previous preparation, was characterized by X-ray diffraction, transmission and scanning electron microscopy, infrared spectroscopy and thermal analysis. By means of these techniques, it was deduced that the composite material is highly crystalline (about 94%), composed of about 92% inorganic and 8% organic portion, and has a predominant size of 760 nm and a mean size of 800 nm. The antibacterial activity of the composite material was also studied, which resulted better against Escherichia coli (Gram-negative bacterium) than against Staphylococcus aureus (Gram-positive bacterium), which was calculated in a difference of about 30%. This work presents the high potential of galactomannans to form functional composite materials with inorganic particles.

    • Author Affiliations

       

      D C BOUTTIER-FIGUEROA1 J A GARCÍA-VALENZUELA2 3 D CABRERA-GERMAN1 3 M COTA-LEAL1 3 M A QUEVEDO-LÓPEZ4 A ROSAS-DURAZO5 M SOTELO-LERMA1

      1. Departamento de Investigación en Polímeros y Materiales, Universidad de Sonora, Calle Rosales y Blvd. Luis Encinas Johnson S/N, C.P. 83000 Hermosillo, Sonora, Mexico
      2. Departamento de Ciencias Químico Biológicas, Universidad de Sonora, Calle Rosales y Blvd. Luis Encinas Johnson S/N, C.P. 83000 Hermosillo, Sonora, Mexico
      3. SMARTER-Lab Nucleus for Research & Divulgation A.C., Blvd. Eusebio Francisco Kino No. 848, C.P. 83150 Hermosillo, Sonora, Mexico
      4. Department of Materials Science and Engineering, University of Texas at Dallas, 800 West Campbell Road, 75250 Richardson, Texas, USA
      5. Laboratorio de Medicina Molecular y Nanomateriales, Rubio Pharma y Asociados, S.A de C.V., Blvd., Jesús García Morales No. 300, C.P. 83210 Hermosillo, Sonora, Mexico
    • Dates

       
  • Bulletin of Materials Science | News

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