Poly(vinyl alcohol)-assisted dispersion of multiwalled carbon nanotubes in aqueous solution for electroanalysis

Amperometric ethanol biosensor based on poly(vinyl alcohol)–multiwalled carbon nanotube–alcohol dehydrogenase biocomposite

“…The preparation of 0.25 wt% PVA cryogel has been described in previous papers (Tsai and Huang, 2006). A 0.25 wt% of PVA (M W = 124,000-186,000 g mol −1 (99% hydrolyzed)) aqueous solution were heated in an oven at 90 • C for 1 h. Then, the solution was cooled to room temperature and subsequently was left at −20 • C for 12 h. After the freezing process, they were allowed to thaw at 4 • C for 12 h. One freezing-thawing cycle was used for the reinforcement of the PVA solution owing to a densification of the macromolecular structure.…”

“…Most commonly, this is accomplished using CNT-coated electrodes (Ausman et al, 2000;Lawrence et al, 2004;Wu et al, 2002) or using CNT-binder composite modified electrodes (Gong et al, 2004;Lim et al, 2005;Pumera et al, 2006;Rubianes and Rivas, 2003;Tsai et al, 2004;Yang et al, 2006). Recently, the ability of PVA to solubilize CNTs provides a useful way for preparing CNT-binder composite modified electrode transducer for a wide range of sensing application has been reported (Tsai and Huang, 2006 to extensive applications in biotechnology, medicine, and food industry (Chiellini et al, 2003;Di et al, 2004;Liu et al, 1996). PVA presents the unusual properties through extremely mild freezing and thawing conditions of its aqueous solution (Lozinsky, 1998).…”

Stability and thermal conductivity enhancement of carbon nanotube nanofluid using gum arabic

“…Functionalisation of CNTs has been carried out by oxidation process under extensive sonication with mixture of sulphuric acid and nitric acid [15]. Physical methods include addition of variety of dispersants, surfactants, polymers and aromatic compounds [16][17][18][19][20][21].…”

Preparation and properties of a novel carbon nanotubes/poly(vinyl alcohol)/epidermal growth factor composite biological dressing

“…2. Next, CNTs were dispersed by PVA, which could accelerate to form a uniform suspension and keep the CNTs original features (27).…”

“…Moreover, PVA has been used in several biomedical applications such as developing medical materials (24)(25)(26). In the present study, PVA was used as a dispersant (27) and medium material and applied to electrospun non-woven fabrics on the gauze in order to close the meshes, so as to effectively prevent granulated tissue from growth inside. The main purpose of the present study was to fabricate and evaluate a novel CNTs/PVA/EGF composite biological nanometer dressing.…”