A building construction product with an electroconductive surface, the building construction product comprising a core with one or more surfaces covered by an electroconductive paper comprising carbon fibers, the electroconductive paper being attached to the one or more surfaces of the core. Methods and materials for producing the building construction products with an electroconductive surface and products and methods for shielding an area from electromagnetic waves.

A transfer method for carbon nanotube array is provided. A carbon nanotube array is located on a first substrate. A pressure is applied to the carbon nanotube array to form a carbon nanotube paper. A second substrate with a bonding layer is placed on the carbon nanotube paper, and the bonding layer is located between the second substrate and the carbon nanotube array. The second substrate is peeled off, and the carbon nanotubes of the carbon nanotube paper vertically aligned and form the carbon nanotube array under forces of the first substrate and the second substrate. The carbon nanotubes of the carbon nanotube array are substantially perpendicular to the surface of the second substrate.

A transfer method for carbon nanotube array is provided. A carbon nanotube array is located on a first substrate. A pressure is applied to the carbon nanotube array to form a carbon nanotube paper. A second substrate with a bonding layer is placed on the carbon nanotube paper, and the bonding layer is located between the second substrate and the carbon nanotube array. The second substrate is peeled off, and the carbon nanotubes of the carbon nanotube paper vertically aligned and form the carbon nanotube array under forces of the first substrate and the second substrate. The carbon nanotubes of the carbon nanotube array are substantially perpendicular to the surface of the second substrate.

The present disclosure provides scalable nanotube fabrics and methods for controlling or otherwise adjusting the nanotube length distribution of a nanotube application solution in order to realize scalable nanotube fabrics. In one aspect of the present disclosure, one or more filtering operations are used to remove relatively long nanotube elements from a nanotube solution until nanotube length distribution of the nanotube solution conforms to a preselected or desired nanotube length distribution profile. In another aspect of the present disclosure, a sono-chemical cutting process is used to break up relatively long nanotube elements within a nanotube application solution into relatively short nanotube elements to realize a pre-selected or desired nanotube length distribution profile.

The present disclosure provides scalable nanotube fabrics and methods for controlling or otherwise adjusting the nanotube length distribution of a nanotube application solution in order to realize scalable nanotube fabrics. In one aspect of the present disclosure, one or more filtering operations are used to remove relatively long nanotube elements from a nanotube solution until nanotube length distribution of the nanotube solution conforms to a preselected or desired nanotube length distribution profile. In another aspect of the present disclosure, a sono-chemical cutting process is used to break up relatively long nanotube elements within a nanotube application solution into relatively short nanotube elements to realize a pre-selected or desired nanotube length distribution profile.

Provided is a porous electrode substrate capable of reducing a drop in electromotive force when used in a battery. This porous electrode substrate comprises a carbon fiber sheet wherein carbon fibers are bound by a binder. For dust of 0.3 m or more in particle size, the dust generation amount per 1 m.sup.2 of the porous electrode substrate is 120,000/m.sup.2 or less, as determined by the following method: dust particles in a gas obtained by suctioning at 47.2 mL/s for 40 minutes using a dust collecting hood having an opening of 500 mm100 mm while traveling the sheet at a speed of 10 m/min from a position 200 mm below the sheet are used; the number of dust particles having a diameter within a predetermined range is measured by a particle counter; and the measured value is divided by 200 m.sup.2, which is a suction area, and the resulting value is defined as a dust generation amount per 1 m.sup.2.

Provided is a porous electrode substrate capable of reducing a drop in electromotive force when used in a battery. This porous electrode substrate comprises a carbon fiber sheet wherein carbon fibers are bound by a binder. For dust of 0.3 m or more in particle size, the dust generation amount per 1 m.sup.2 of the porous electrode substrate is 120,000/m.sup.2 or less, as determined by the following method: dust particles in a gas obtained by suctioning at 47.2 mL/s for 40 minutes using a dust collecting hood having an opening of 500 mm100 mm while traveling the sheet at a speed of 10 m/min from a position 200 mm below the sheet are used; the number of dust particles having a diameter within a predetermined range is measured by a particle counter; and the measured value is divided by 200 m.sup.2, which is a suction area, and the resulting value is defined as a dust generation amount per 1 m.sup.2.

A bio buckypaper synthesized with fish scales may be manufactured by mixing carrageenan with a bio waste solution to provide a first mixture, adding carbon nanotubes to the first mixture produce a second mixture, sonicating the second mixture, and evaporative-casting the second mixture to produce the bio buckypaper. In an embodiment, the carrageenan may be -carrageenan. In an embodiment, the carbon nanotubes may be single walled carbon nanotubes (SWCNTs) or multi-walled carbon nanotubes (MWCNTs). In an embodiment, the bio waste solution may be derived from fish scales.

A bio buckypaper synthesized with fish scales may be manufactured by mixing carrageenan with a bio waste solution to provide a first mixture, adding carbon nanotubes to the first mixture produce a second mixture, sonicating the second mixture, and evaporative-casting the second mixture to produce the bio buckypaper. In an embodiment, the carrageenan may be -carrageenan. In an embodiment, the carbon nanotubes may be single walled carbon nanotubes (SWCNTs) or multi-walled carbon nanotubes (MWCNTs). In an embodiment, the bio waste solution may be derived from fish scales.

The present disclosure provides scalable nanotube fabrics and methods for controlling or otherwise adjusting the nanotube length distribution of a nanotube application solution in order to realize scalable nanotube fabrics. In one aspect of the present disclosure, one or more filtering operations are used to remove relatively long nanotube elements from a nanotube solution until nanotube length distribution of the nanotube solution conforms to a preselected or desired nanotube length distribution profile. In another aspect of the present disclosure, a sono-chemical cutting process is used to break up relatively long nanotube elements within a nanotube application solution into relatively short nanotube elements to realize a pre-selected or desired nanotube length distribution profile.