Kim Youngno, Yoo Sinseok, Kim Jung-Hyun
KIURI Institute, Yonsei University, 50 Yonsei-ro, Seodaemoon-gu, Seoul 03722, Korea.
Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodamoon-gu, Seoul 03722, Korea.
Polymers (Basel). 2022 Feb 26;14(5):949. doi: 10.3390/polym14050949.
Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) has the merits of high electrical conductivity and solution processability, and can be dispersed in water. To improve the stretchability of PEDOT:PSS-based transparent electrode films, the intrinsically conducting polymer PEDOT:PSS was blended with highly stretchable nonionic waterborne polyurethane (WPU) and coated on a thermoplastic polyurethane (TPU) film. Nonionic WPU has good compatibility with PEDOT:PSS, without affecting the acidity. WPU undergoes hydrogen bonding and coulombic attractions with PEDOT:PSS. With variation of the WPU content, differences in the electrical properties, such as the sheet resistance and mechanical stretchability, of the coated thin films were observed. The film with 2.0 wt% WPU could be stretched to 400% of the electrode surface without damage to the surface of the electrode films. The WPU and TPU films both have a polyester group, which provides good adhesion between the WPU-based transparent electrodes and the TPU substrate films. A stretchable alternating current electroluminescence (ACEL) device was constructed by using the water-based PEDOT:PSS/nonionic WPU composite as both the bottom and top transparent electrodes. The fabricated ACEL remained its initial luminance in the 500% stretched state.
聚（3,4-乙撑二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT:PSS）具有高导电性和溶液可加工性的优点，并且可以分散在水中。为了提高基于PEDOT:PSS的透明电极薄膜的拉伸性，将本征导电聚合物PEDOT:PSS与高拉伸性的非离子水性聚氨酯（WPU）共混，并涂覆在热塑性聚氨酯（TPU）薄膜上。非离子WPU与PEDOT:PSS具有良好的相容性，且不影响其酸度。WPU与PEDOT:PSS之间存在氢键和库仑吸引力。随着WPU含量的变化，观察到涂覆薄膜的电学性能（如方阻和机械拉伸性）存在差异。含2.0 wt% WPU的薄膜可拉伸至电极表面的400%，而不会损坏电极薄膜表面。WPU薄膜和TPU薄膜均含有聚酯基团，这使得基于WPU的透明电极与TPU基底薄膜之间具有良好的附着力。通过使用水性PEDOT:PSS/非离子WPU复合材料作为底部和顶部透明电极，构建了一种可拉伸的交流电致发光（ACEL）器件。所制备的ACEL在拉伸500%的状态下仍保持其初始亮度。
