Actas de congresos
Preparation Of Copper Nanoparticles In Chitosan Membranes And Their Application As Irreversible Humidity Indicators
Registro en:
Chemical Engineering Transactions. Italian Association Of Chemical Engineering - Aidic, v. 24, n. , p. 217 - 222, 2011.
19749791
10.3303/CET1124037
2-s2.0-79955488836
Autor
De Godoi F.C.
Rabelo R.B.
Da Cruz Vasconcellos F.
Beppu M.M.
Institución
Resumen
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. 24
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