To provide a production method of a carbon nanotube film, can improve conductivity by an easy method, and further, to provide a production method of a carbon nanotube film having improved transparency and conductivity by providing a production method of a carbon nanotube film having improved conductivity.
The production method of a carbon nanotube film includes the following steps. The steps are: (1) preparing a carbon nanotube dispersion liquid containing an anionic dispersant selected from (A) to (C), and an acid; and (2) producing a carbon nanotube film by using the carbon nanotube dispersion liquid prepared in the step (1). The dispersants are (A) a non-conjugate polymer dispersant having an anionic functional group, (B) a polymer dispersant having an anionic functional group and having a conjugate skeleton and a non-conjugate skeleton in the main chain, and (C) a non-polymer dispersant having an anionic functional group.
NISHINO HIDEKAZU
NUMATA SHUKO
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