Surface treatment with microwave plasma improving PEDOT:PSS adhesion on natural rubber

International Conference on Materials Research and Innovation

Meesawat, K.^1 ; Thana, K.^2 ; Jaisutti, R.^2 ; Petchsang, N.^1^3

Department of Material Science, Faculty of Science, Kasetsart University, Bangkok

10900, Thailand^1

Department of Physics, Faculty of Science and Technology, Thammasat University, Pathumthani

12121, Thailand^2

Specialized Center of Rubber and Polymer Materials for Agriculture and Industry (RPM), Faculty of Science, Kasetsart University, Bangkok

10900, Thailand^3

关键词: Composite substrate;    Electrical measurement;    Hydrophilic surfaces;    Hydrophobic surfaces;    Microwave plasma;    Poly-3 ,4-ethylenedioxythiophene;    Polystyrene sulfonate;    Water contact angle;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/526/1/012045/pdf
DOI  :  10.1088/1757-899X/526/1/012045

来源: IOP

【 摘 要 】

Hydrophobic surface of pre-vulcanized natural rubber can be modified to a hydrophilic surface under plasma treatment. This is useful to make flexible and composite substrate from natural rubber in many applications. A low-cost microwave plasma cleaner was built using argon gas as a source for generating plasma. The plasma treatment conditions on rubber were investigated under two parameters: treatment time and treatment cycles. We found that the water contact angle was decreased when the pre-vulcanized natural rubber was treated more time or more cycles. To create the conductivity of natural rubber, poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) in water was spin on the treated rubber surface. The electrical measurement shows conductivity on the rubber surface with a uniform current-voltage relationship. Without plasma treatment, PEDOT:PSS hardly attached on surface yielding no conductivity appeared on natural rubber.