Conductive bacterial cellulose-polyaniline blends: Influence of the matrix and synthesis conditions. (1st March 2018)

• Record Type: Journal Article
• Authors: Alonso, Emanuel; Faria, Marisa; Mohammadkazemi, Faranak; Resnik, Matic; Ferreira, Artur; Cordeiro, Nereida
• Is Part Of: Carbohydrate polymers. Volume 183(2018)
• Page Start: 254
• Page End: 262
• Publication Date: 2018-03-01
• Subjects: Bacterial cellulose -- Polyaniline -- Blend membrane -- Inverse gas chromatography; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2017.12.025
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: BC matrixes greatly influence the blend membrane final properties. The synthesis conditions influence the blend membrane conductivity. Improved conductivity is obtained through in situ polymerization on drained BC. Changes in the physico-chemical properties were highlighted by IGC. Abstract: Bacterial cellulose/polyaniline (BC/PANi) blends present a great potential for several applications. The current study evaluates the impact of using different BC matrixes (drained, freeze-dried and regenerated) and different synthesis conditions ( in situ and ex situ ) to improve the inherent properties of BC, which were monitored through FTIR-ATR, EDX, XRD, SEM, AFM, swelling, contact angle measurement and IGC. The employment of in situ polymerization onto drained BC presented the most conductive membrane (1.4 × 10 −1 S/cm). The crystallinity, swelling capacity, surface energy and acid/base behavior of the BC membranes is substantially modified upon PANi incorporation, being dependent on the BC matrix used, being the freeze-dried BC blends the ones with highest crystallinity (up to 54%), swelling capacity (up to 414%) and surface energy (up to 75.0 mJ/m 2 ). Hence, this work evidenced that the final properties of the BC/PANi blends are greatly influenced by both the BC matrixes and synthesis methods employed.