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Type: Artigo de evento
Title: Preparation Of Copper Nanoparticles In Chitosan Membranes And Their Application As Irreversible Humidity Indicators
Author: De Godoi F.C.
Rabelo R.B.
Da Cruz Vasconcellos F.
Beppu M.M.
Abstract: Copper nanoparticles were prepared in chitosan (CHI) membranes via reduction of CuSO4.5H2O with sodium borohydride (BH). The fabrication process was performed in two steps: (1) first adsorbing Cu(II) ions in the CHI membranes, followed by (2) a chemical reduction of the Cu(II) ions to zero-valent copper (using BH). This study used SEM, DSC, and XRD to examine the morphological, thermal and chemical properties of the CHI-copper membranes. The synthesized CHI-copper membranes were exposed to ambient humidity and characterized by digital-image analysis with RGB color standards. The results showed that the CHI-copper membranes produced were successfully able to detect ambient moisture shown by the color changes of the membranes (from dark brown to blue). These CHI-copper membranes hold great promise in the engineering field for the production of humidity indicators and sensors. © 2011, AIDIC Servizi S.r.l.
Editor: Italian Association of Chemical Engineering - AIDIC
Rights: fechado
Identifier DOI: 10.3303/CET1124037
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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