Thermal and electrical properties of starch–graphene oxide nanocomposites improved by photochemical treatment

Peregrino, Priscilla P.; Sales, Maria J. A.; Silva, Mauro F. P. da; Soler, Maria A. G.; Silva, Luiz F.L. da; Moreira, S. G. C.; Paterno, Leonardo G.

doi:10.1016/j.carbpol.2014.02.008

Cited by 50 publications

(30 citation statements)

References 28 publications

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“…It is important to note that photochemical reaction with GO and laser could convert the GO phase into reduced graphene oxide (RGO) [42]. Recently (2014), simple non-covalent approach was reported to immobilize hydrophobic silicon napthalocyanine bis (trihexylsilyloxide) (SiNc) photosensitizer onto water dispersible magnetic and fluorescent graphene (MFG) via pep stacking to yield MFGSiNc that can use for theranostics nanocarrier [43].…”

Section: The Morphology Changes Of S Aureus Using Tem Imagesmentioning

confidence: 99%

Near infrared (NIR) laser mediated surface activation of graphene oxide nanoflakes for efficient antibacterial, antifungal and wound healing treatment

Khan

Abdelhamid²,

2015

Colloids and Surfaces B: Biointerfaces

180

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Section: The Morphology Changes Of S Aureus Using Tem Imagesmentioning

confidence: 99%

Near infrared (NIR) laser mediated surface activation of graphene oxide nanoflakes for efficient antibacterial, antifungal and wound healing treatment

Khan

Abdelhamid²,

2015

Colloids and Surfaces B: Biointerfaces

180

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“…[32][33][34] First, water and volatile compounds, as well as oxygenated moieties of GO degrade at temperatures below 250°C. [35] Second, the major mass loss between 250 and 400°C is attributed to the decomposition of AC chains, while the last slow degradation step from 400 to 800°C refers to the disintegration of the residues. At a closely look it can be observed that the increase of GO loading caused a delayed polymer degradation start, particularly for the 1 wt% GO loading.…”

Section: Thermogravimetrical Analysismentioning

confidence: 99%

Fabrication of cellulose triacetate/graphene oxide porous membrane

Ioniță

Crică

Voicu

et al. 2015

Polym. Adv. Technol.

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Cellulose triacetate (AC)/graphene oxide (GO) porous membranes were successfully fabricated by combining ultrasonication and phase inversion method. The structures and morphologies of the resultant composite membranes were investigated by X-ray diffraction (XRD), scanning electron microscopy, and transmission electron microscopy, respectively. Microscopic and X-ray diffraction measurements revealed that GO sheets were uniformly dispersed within the AC matrix. The pore size and structure were modulated by changing GO concentration from 0.25 to 1 wt%. Membrane thermal properties were also studied. Among all tested membranes, the most favorable GO amount was 1 wt%, giving Td 3% of 274°C, which represents a 22°C enhancement compared with AC. Conversely, the membranes showed improved barrier properties against water and ethanol. The decrease of both ethanol and water fluxes was assigned to the stabilization of composite membrane structure, as a result of GO progressive addition. Bovine serum albumin rejection assay indicated an increasing from 78% in the case of CA membrane to 99% in the case of CA/GO 1 wt% of the rejection degree after 90 min.

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“…Starch is a very promising natural polymer for the development of new technologies because it is renewable, biodegradable, and widely available [6,7]. In addition, its mechanical, electrical, optical, and thermal properties can be improved further by chemical modifications or combination with nanosized additives, which can diversify and increase its utilization [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Original photochemical synthesis of Ag nanoparticles mediated by potato starch

et al. 2019

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In this contribution, we report an original photochemical method and its mechanism, in which Ag nanoparticles (AgNPs) are formed in the presence of starch. AgNO 3 /potato starch aqueous suspensions are irradiated (254 nm, 8 W) at room temperature and the Ag + /starch ratio can be varied to tune the size of AgNPs. The evolution of the AgNPs plasmon resonance band during the reaction is monitored by UV-Vis spectroscopy and evidences that AgNPs are formed in a two-stage process combining nucleation and growth, with the nucleation being controlled by the amount of added starch. Moreover, infrared and Raman spectra indicates that starch undergoes oxidation simultaneously to Ag + reduction, even though starch alone is not capable of reducing Ag + at an appreciable rate and UV irradiation is essential to produce sizeable amounts of AgNPs. Transmission electron microscopy reveals that AgNPs are nearly spherical with diameters ranging between 13 and 8 nm. The AgNPs/starch suspensions exhibit hydrodynamic diameters between 150 and 200 nm and zeta potentials very close to zero. Since AgNPs/starch suspensions are very stable over time, the colloidal stability is ensured by the steric hindrance imposed by starch rather than electrostatic repulsion.

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Thermal and electrical properties of starch–graphene oxide nanocomposites improved by photochemical treatment

Cited by 50 publications

References 28 publications

Near infrared (NIR) laser mediated surface activation of graphene oxide nanoflakes for efficient antibacterial, antifungal and wound healing treatment

Near infrared (NIR) laser mediated surface activation of graphene oxide nanoflakes for efficient antibacterial, antifungal and wound healing treatment

Fabrication of cellulose triacetate/graphene oxide porous membrane

Original photochemical synthesis of Ag nanoparticles mediated by potato starch

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