Activated carbon cloth dressing is an appropriate wound healing material due to its biocompatibility and adsorption characteristics. The influence of gamma radiation as a sterilization process on the mechanical properties activated was investigated. specific surface area, micropore volume, pore size distribution, chemistry well breaking load before after were examined. Characterization by nitrogen showed that microporous with high area micropores smaller than 1 nm. Gamma decreased volume but...

Laser beam interaction with carbon based material (glassy carbon) is analyzed in this paper. Nd3+:YAG laser (1.06?m i.e. near infrared, NIR range) ms regime various energy densities used. In all experiments, provided applied working regimes, the surface damages have occurred. The results of are by light and electron scanning (SEM) microscopies. Program Image J executed for quantitative analysis generated on micrographs obtained SEM microscopes. Temperature distribution exposed samples...

A carbon cryogel, synthesized by carbonization of a resorcinol/formaldehyde cryogel and oxidized in nitric acid, was used as catalyst support for Pt nanoparticles. The Pt/C prepared modified polyol synthesis method an ethylene glycol (EG) solution. Characterization nitrogen adsorption showed that the were mesoporous materials with high specific surface areas (Sbet>400 m2 g-1) large volumes. X-Ray diffraction demonstrated successful reduction precursor to metallic form. TEM Images particle...

Carbon hollow fibers were prepared with regenerated cellulose or polysulfone by chemical activation using sodium phosphate dibasic followed the carbonization process. The process increases adsorption properties of which is more prominent for active carbone obtained from precursor. Chemical produces an carbon material both mesopores and micropores.

Active carbon hollow fibers were prepared from regenerated polysulfone by chemical activation using: disodium hydrogen phosphate 2-hydrate, tetraborate 10-hydrate, peroxide, and diammonium phosphate. After carbonized in an inert atmosphere. The specific surface area porosity of obtained carbons studied nitrogen adsorption-desorption isotherms at 77 K, while the structures examined with scanning electron microscopy X-ray diffraction. process increases these adsorption properties being more...

Carbon fibrous materials are interesting because of their good properties and numerous possible applications. The characteristics these can be programmed by careful selection the modification process parameters. laser technique successfully employed for purposes. high temperatures arising in material during a short pulse cause number changes material. with different textile shapes, stages processing, were exposed to radiation. A ruby (X=694.3 nm) was used modify structural examined scanning...

Resorcinol-formaldehyde (RF) cryogels were synthesized by sol-gel polycondensation of resorcinol with formaldehyde and freeze-drying carried out t-butanol. Carbon obtained pyrolyzing RF in an inert atmosphere. Characterization nitrogen adsorption showed that carbon micro- mesoporous materials high surface areas (500 m2/g< SBET <700 m2/g). Cyclic voltammetry experiments at various scan rates (2 to 200 mV s-1) study the electrical double-layer charging cryogel electrodes 0.5 mol dm-3...

In presented paper, influence of temperature, precursor concentration and different hydroxides on properties activated carbon obtained from saccharose were investigated. The samples prepared by hydrothermal treatment using KOH, NaOH LiOH. Two concentrations (0.5, 1.0 mol/dm3) three temperatures (160, 200, 240 ?C) changed in treatment. Activation processes performed at 750?C under N2 atmosphere. Samples characterized X-ray powder diffractometry, elemental analysis, adsorption-desorption...

A qualitative study of the damages on a carbon cloth induced by various shapes CO2 laser pulses is presented. Three pulse were used: short (100 ns, 84 MW/cm2), tailed (∼100-ns spike 70 MW/cm2, 2-μs tail), and extralong (45 μs, 0.5 MW/cm2). Apparently, energy absorbed was mainly converted into thermal energy, causing range damages, from instantaneous evaporation to cracking melting, all which resulted in cutting individual fibers yarns cloth. The two longer types allowed sufficient time for...

Purpose – The purpose of this paper is to present the results interaction occurring during exposition some specific carbon textile materials obtained in laboratory conditions beams various laser types. Design/methodology/approach Carbon fabric fiber, felt and cloth from different precursor prepared at process (oxidized, partially carbonized, graphitized), were exposed pulses lasers (Nd3+: YAG, alexandrite, ruby). Findings Depending on power, plasma destructive phenomena occurred. In case an...

It is well known that application of stimulated light may influence phase modifications and changes carbon structure. These effects laser irradiation, in different working regimes atmospheres, are widely investigated for fullerenes diamond structure, but many other materials, not. In the presented experiments, we treated by Q-switch ruby Nd<SUP>3+</SUP> YAG beams clothes, produced pyrolysis (T &lt;EQ 1000 degree(s)C) cellulose materials inert atmosphere. The interesting applications,...

Scattering of optical photons from the view parallel methods related to absorption, scattering, fluorescence, reflection with inclusion polarization states laser beams experiment and theory give many possibilities for obtaining indirect data on material, processes, dynamics. As a method minimal perturbations, if low power are involved, certain type is provided. In fundamental dependences various material properties, phenomenological basic laws covered. Several coupled variables, primarily...

Carbonaceous materials as well its form functionalized with metallic silver have been prepared by hydrothermal carbonization of fructose. Results are presented to show that nanostructured was obtained through the functionalization process. The carbonaceous were characterized by: nitrogen adsorption/desorption measurement, XRD, SEM/EDS and FTIR. Samples analyzed XRD SEM/EDS. analysis showed process successfully performed. Size particles found be approximately 32 nm, indicating formation...

Production process and characteristics of PAN based carbon fibers cellulose textile are presented. In the case attention is paid to changes during carbonization in range 400-1000?C. The change diameter weight loss as well tensile strength Young's modulus were examined. For it was interesting show their adsorption activated material. nitrogen isotherms correspond microporous adsorbent which suitable for both gaseous liquid adsorbats.

The coupling of some fundamental sciences and issues arising from it are considered in this paper. transport optical characteristics belong to nowadays problems material science. Some measurements their interpretations for chosen condensed materials considered. Various processes, which include directly acoustic measured solid liquid materials. After obtained principal measurement, with them is performed. Principal links dielectric, resistive, acoustical performances. Nonlinear contribution...

Optical material performances along with main response functions belong to nondestructive measurements. Lasers brought new techniques beside accuracy increase. Nonlinear introduced solutions. These could be used in industry, biomedicine, and ecology fast description various phases. The paper is elaborating optical characteristics phases descriptions (purity, dynamics breakdowns). From the scattering point of view, water represented medium, unstable when pure comparing organic etalons. As...