Polydopamine-assisted dip-and-dry fabrication of highly conductive cotton fabrics using single-wall carbon nanotubes inks for flexible devices

Fabrication of highly conductive polyester fabrics using single-wall carbon nanotubes inks for EMI shielding

“…To prepare the ink, 40 ml of DMF was used as a solvent, in which 0.1 wt% of SWCNTs were dispersed for 1 h using a micro ultrasonic homogenizer (pulse 5 s cycle, amplitude 200 W, Q125, Qsonica). 11,[26][27][28] The prepared ink is hereafter called the SWCNT ink.…”

“…We repeated this dip-and-dry process three times. 11) The SWCNT-coated electrically conductive polyester fabrics using a high-temperature (HT) dip-and-dry method are hereafter called HT-SWCNT-polyester fabrics. Using the same HT dip-and-dry method as in Fig.…”

“…In this study, we focused on the surface modification of polyester fibers using a DMF solvent to overcome the poor adhesion. [14][15][16][17] However, polyester fabrics significantly deteriorated when the fabrication process in our previous study, in which fabrics were dipped in a bath-type sonicator and dried at 160 °C, 11) was used because polyester fabrics chemically interacted with the hot DMF solvent. To address this issue, we proposed a lowtemperature (LT) dip-and-dry method using a ball mill and vacuum drying, in which a lower temperature than the T g of polyester fibers was used to avoid deterioration of the polyester fabrics due to the chemical interaction with the DMF solvent.…”

“…[6][7][8][9] Previous studies of SWCNT-coated electrically conductive fabrics and yarns using the dip-anddry method used cotton fibers. [6][7][8][9][10][11] Electrically conductive cotton fabrics and yarns can be fabricated by utilizing the /p CH interaction between SWCNTs and cotton fibers. 12,13) For example, Sadi et al 6) fabricated electrically conductive cotton fabrics with a sheet resistance (R S ) of 41.5 using the dip-and-dry method using water-based SWCNT ink.…”

“…We have previously fabricated electrically conductive cotton fabrics with a lower R S of 9  2 Ω sq −1 using the dip-anddry method using N,N-dimethyl-formamide (DMF)-based SWCNT ink. 11) From the viewpoint of industrial applications, chemical fiber fabrics such as polyester fabrics are more suitable than cotton fabrics because of their higher heat resistance. However, SWCNTs have poor adhesion to polyester fabrics because polyester fabrics have no CH functional groups.…”