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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.|
Da Cruz Vasconcellos F.
|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|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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