PEDOT: PSS/EG/LiTFSI conductive ink, super-flexible electrode and electrophysiological signal monitoring method
A conductive ink, ultra-flexible technology, applied in diagnostic recording/measurement, ink, medical science, etc., can solve the problems of low conductivity and stretchability, achieve improved conductivity and stretchability, and good printing effect Effect
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Embodiment 1
[0069] The present embodiment provides a method for modifying PEDOT:PSS with ethylene glycol and lithium bistrifluoromethanesulfonimide to obtain a PEDOT:PSS / EG / LiTFSI solution, which comprises the following steps:
[0070] 1) Prepare PEDOT:PSS / 5wt%EG / 10wt%LiTFSI solution
[0071] On the basis of the PEDOT:PSS / 5wt%EG solution prepared in Comparative Example 1, LiTFSI was added to make it account for 10wt% of the solid content of PEDOT:PSS, and the stirring was carried out. The stirring speed was 900r / min, and the stirring time was 15min. The PEDOT:PSS / 5wt%EG / 10wt%LiTFSI solution can be obtained.
[0072] 2) Viscosity test
[0073] The viscosity of the PEDOT:PSS / 5wt%EG / 10wt%LiTFSI solution was tested with a digital viscometer, and the viscosity was 23.8cP.
[0074] 3) Surface tension test
[0075] The surface tension of the PEDOT:PSS / 5wt%EG / 10wt%LiTFSI solution was tested with a surface tensiometer, and the surface tension was 36.7 mN / m.
[0076] 4) Preparation of flexible ...
Embodiment 2
[0082] The present embodiment provides a method for modifying PEDOT:PSS with ethylene glycol and lithium bistrifluoromethanesulfonimide to obtain a PEDOT:PSS / EG / LiTFSI solution, which comprises the following steps:
[0083] 1) Preparation of PEDOT:PSS / 5wt%EG / 20wt%LiTFSI solution
[0084] The addition amount of LiTFSI was changed to account for 20wt% of the total system, and other steps were the same as in Comparative Example 1.
[0085] 2) Viscosity test
[0086] The viscosity of the PEDOT:PSS / 5wt%EG / 20wt%LiTFSI solution was tested with a digital viscometer, and the viscosity was 20.2cP.
[0087] 3) Surface tension test
[0088] The surface tension of the PEDOT:PSS / 5wt%EG / 20wt%LiTFSI solution was tested with a surface tensiometer, and the surface tension was 35.5 mN / m.
[0089] 4) Preparation of flexible self-supporting PEDOT:PSS / 5wt%EG / 20wt%LiTFSI films
[0090] The preparation process is the same as in Example 1.
[0091] 5) Conductivity test
[0092] The conductivity ...
Embodiment 3
[0094] The present embodiment provides a method for modifying PEDOT:PSS with ethylene glycol and lithium bistrifluoromethanesulfonimide to obtain a PEDOT:PSS / EG / LiTFSI solution, which comprises the following steps:
[0095] 1) Prepare PEDOT:PSS / 5wt%EG / 30wt%LiTFSI solution
[0096] The addition amount of LiTFSI was changed to account for 30wt% of the total system, and other steps were the same as those in Example 1.
[0097] 2) Viscosity test
[0098] The viscosity of the PEDOT:PSS / 5wt%EG / 30wt%LiTFSI solution was measured by a digital viscometer, and the viscosity was 18.7cP.
[0099] 3) Surface tension test
[0100] The surface tension of the PEDOT:PSS / 5wt%EG / 30wt%LiTFSI solution was tested with a surface tensiometer, and the surface tension was 34.2 mN / m.
[0101] 4) Preparation of flexible self-supporting PEDOT:PSS / 5wt%EG / 30wt%LiTFSI films
[0102] The preparation process is the same as in Example 1.
[0103] 5) Conductivity test
[0104] The conductivity of PEDOT:PSS / 5w...
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