Cellulose acetate propionate coated titanium: characterization and biotechnological application

Gomes, Guilherme da Silva; Almeida, Arlete Tavares; Kosaka, Priscila M.; Rogero, Sizue Ota; Cruz, Ana M.; Ikeda, Tamiko Ichikawa; Petri, Denise Freitas Siqueira

doi:10.1590/s1516-14392007000400023

Cited by 23 publications

(8 citation statements)

References 25 publications

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“…In this case, physical blends of CMCAB and the drug are prepared in the solid state, ground and molded into tablets by compression. However, cellulose esters have been often applied as binders, additives, film formers or modifiers in automotive, wood, plastic and leather coatings applications (Edgar et al 2001) and as supports for adsorption of proteins (Kosaka et al 2005(Kosaka et al , 2007a and cell growth (Gomes et al 2007). All these applications require knowledge about polymer behavior in solution and thin film properties.…”

Section: Introductionmentioning

confidence: 99%

Solution behavior and surface properties of carboxymethylcellulose acetate butyrate

et al. 2009

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Solution behavior of carboxymethylcellulose acetate butyrate (CMCAB) in acetone and ethyl acetate has been investigated by small-angle X-ray scattering (SAXS) and capillary viscometry and correlated with the characteristics of CMCAB films. Viscosity and SAXS measurements showed that ethyl acetate is a better solvent than acetone for CMCAB. Thin films of CMCAB were deposited onto silicon wafers (Si/SiO 2 ) by spin coating. AFM images revealed that CMCAB spin coated films from solutions prepared in ethyl acetate were homogeneous and flat. However, films obtained from solutions in acetone were very rough. Contact angle measurements with polar and apolar test liquids characterized CMCAB surfaces as hydrophobic and allowed estimating the surface energy of CMCAB. Sum frequency generation vibrational spectroscopy was used to understand the role played by solvents and to gain insight about molecular orientation at Si/SiO 2 /CMCAB interface.

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Section: Introductionmentioning

confidence: 99%

Solution behavior and surface properties of carboxymethylcellulose acetate butyrate

et al. 2009

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“…However, surface energy parameters seem to control the adhesion and growth of cells (Gomes et al, 2007;Harnett, Alderman, & Wood, 2007) or the adsorption of proteins (Kosaka, Kawano, El Seoud, & Petri, Fig. 4.…”

Section: Resultsmentioning

confidence: 99%

Effect of solvent on the adsorption behavior and on the surface properties of Sterculia striata polysaccharide

Dário

Paula

et al. 2010

Carbohydrate Polymers

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a b s t r a c tCharacterization of Sterculia striata polysaccharide (SSP) films adsorbed onto Si wafers from solutions prepared in ethyl methyl imidazolium acetate (EmimAc), water or NaOH 0.01 mol/L was systematically studied by means of ellipsometry, atomic force microscopy and contact angle measurements. SSP adsorbed from EmimAc onto Si wafer as homogeneous monolayers (∼0.5 nm thick), while from water or NaOH 0.01 mol/L SSP formed layers of ∼4.0 nm and ∼1.5 nm thick, respectively. Surface energy values found for SSP adsorbed from EmimAc or water were 68 ± 2 mJ/m 2 and 65 ± 2 mJ/m 2 , respectively, whereas from NaOH it amounted to 57 ± 3 mJ/m 2 . The immobilization of lysozyme (LYS) onto SSP films was also investigated. The mean thickness of LYS (d LYS ) immobilized onto SSP films adsorbed from each solvent tended to increase with the decrease of p S and total S . However, the enzymatic activity of LYS molecules was higher when they were immobilized onto SSP films with higher p S and total S values.

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“…The high occupancy of d-orbitals lowers the energy of the d states, thus moving the energy levels away from the conduction band and contributing to the valence band maximum [14]. The catalytic efficiencies of the TiO 2 nanotubes are related to the S BET of the catalyst [15]./ As summarized in Tabl. 1, the S BET of TiO 2 nanotubes decreased with increasing calcination temperature.…”

Section: Characterization Of Photocatalystsmentioning

confidence: 99%

Effects of metal ion-doping on the characteristics and photocatalytic activities of TiO<sub>2</sub> nanotubes

Wang¹

2018

Funct.Mater.

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Ion-doped TiO 2 nanotubes were synthesized via a hydrothermal method and characterized by transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and specific surface areas. The binding energies of Cu 2+ , V 2+ , and Zn 2+ indicated that the doping ions existed as Cu 2+ , V 5+ , and Zn 2+ , respectively. With the increase of the calcination temperature, the intensity of the anatase phase decreased and the BET surface area decreased. The extent of anatase phase increased with the increasing the calcination temperature, and then decreased. The highest catalytic activity for the un-doped TiO 2 nanotubes was observed at a calcination temperature of 500 °C, with a Rhodamine B (RB) removal efficiency of 98.1%. The removal efficiency of RB was 98.2% when Cu 2+-doped catalyst calcined at 450 °C was added, 0.1% higher than the un-doped TiO 2 nanotubes. The highest photocatalytic activity was obtained in the presence of Zn 2+-doped catalyst calcined at 550 °C, where 98.7% of RB was removed.

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Cellulose acetate propionate coated titanium: characterization and biotechnological application

Cited by 23 publications

References 25 publications

Solution behavior and surface properties of carboxymethylcellulose acetate butyrate

Solution behavior and surface properties of carboxymethylcellulose acetate butyrate

Effect of solvent on the adsorption behavior and on the surface properties of Sterculia striata polysaccharide

Effects of metal ion-doping on the characteristics and photocatalytic activities of TiO<sub>2</sub> nanotubes

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