Carbon fabrics

T. H. Ko. Method for making carbon fabric and product thereof. US Patent... 

FIG. 21. Cross section through a commercial Prototech electrode fabricated from a carbon fabric impregnated with PTFE- bonded, Pt-catalyzed soot particles. The layer of light color below the electrode is the SiC matrix, determined to keep the electrolyte between the electrodes. 

Effect of Oxidative Treatment on the Capacitance of Activated Carbon Fabrics... 

Two case studies are presented in which polymer nanotube composites are proposed as replacements for conventional materials. We evaluate the technical and economic feasibility of using them as smart materials for strain gauges thus, exploiting their electrical properties, and as structural materials for aircraft panels bringing into play their mechanical properties. Our analysis shows that as new strain gauge materials, polymer nanotube composites offer many advantages. As a possible replacement for aluminum in an aircraft panel, it is found that a hybrid composite of (Epoxy 33% carbon fabric + 30% carbon fibers + 3% CVD-MWNT) is an attractive candidate. 

From Farag 2008 (53), the mass of an aluminum panel that can bear the load in a civilian aircraft is 20.25 kg. The masses of CFRP and CNTRP panels of equivalent stiffness can be estimated from the proportionality of the weight to (p/ E1/3) and the values in Tables 15.5 and 15.6. The values for the aluminum alloy and Epoxy 33% carbon fabric+30% carbon fibers are based on (53). The calculated values are given in Table 15.7. The calculations show that, with the exception of Epoxy+1 wt% CVDMWNT and Epoxy+0.1 wt % MWNT (54), the aluminum panel is heaviest. The cost of material in a panel is calculated from its mass and the cost of material per kg, from Table 15.5. The results show that, with the exception of Epoxy+0.1 wt% MWNT, the aluminum panel is the least expensive. 

The results of Table 15.7 show that the hybrid composite (Epoxy 33% carbon fabric + 30% carbon fibers + 3% CVD-MWNT) gives the maximum cost saving and is, therefore, given top ranking. Of the two second best materials (Epoxy+20% CVDMWNT and Epoxy+33%carbon fabric+30% carbon fibers) the latter is a more... 

If hydrofluoric acid is present in the environment, obviously glass fabric will not serve. In such cases, reinforcement for membranes, whether resinous or asphaltic, is usually a polyester-type cloth. Where the service conditions are outside the limits of polyester fabric (for instance, too high a temperature or a solvent that attacks polyesters), a carbon fabric cloth may be used. 

The use of activated carbon fabric as the adsorbent in an H2 PSA process has also been reported.56 The advantage of the fabric is that it does not require additional supports like metal mesh, paper, and aluminum foil, and the bulk density of the adsorbent material in the PSA adsorber is increased. 

The materials for the experiments were an aqueous dispersion PTFE (FLUON XAD -911 average diameter of particles 0.25 pm, concentration 60 wt%, Mn 1.4 x 106, viscosity at 25 °C 20 mPa-s, Asahi-Glass Fluoropolymers Co. Ltd.), and fluorinated-compound such as fluorinated-pitch (Rinoves P N-7-M average diameter of particles 1.2 pm, atom ratio of F/C 1.6, Mn 2.0 x 103, Osaka Gas Chemicals Co. Ltd.) [12, 13]. And also the plane-woven carbon fabric (TORAYCA T-300, C06142, TORAY Industries, Inc.) was used for the mechanical tests such as the tensile and the flexural tests. 

Table I shows the mechanical properties of the carbon fiber-reinforced PTFE (PTFE composite non-crosslinked) and the carbon fiber-reinforced PTFE with fluorinated-pitch (PTFE / FP composite thermo-chemical crosslinked). For the tensile test with a direction of 45 ° for plane-woven carbon fabric, the tensile strength of the PTFE / FP composite was about 2.3 times higher than that of the non-crosslinked PTFE composite. Moreover, the Young s modulus of the crosslinked composite was about 2.6 times higher than that of the PTFE composite. The tensile strength and Young s modulus are results of 0 ° or 90 ° direction for the fabric reflected the carbon fiber strength and the modulus.

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