how to manufacture PTC ink
It would have been helpful if you have said what kind of polymer-based nanocomposites you would like to create. Yet, I found a good article for the fabrication of poly dimethylsiloxane/carbon nanofiber (CNF)-based nanocomposites. The schematic diagram of experimental procedure is illustrated in following figure (from the Ref. 1).



The experimental section in Ref.1 describes the step-wise procedure for the fabrication. It also provides a useful few more references for polymer-based nanocomposite formulations. I also included another reference (Ref.2), which may be helpful to you.



References:


S. Chowdhury, M. Olima, Y. Liu, M. Saha, J. Bergman, T. Robison, Poly dimethylsiloxane/carbon nanofiber nanocomposites: fabrication and characterization of electrical and thermal properties, International Journal of Smart and Nano Materials, 2016, 7(4), 236-247 (https://doi.org/10.1080/19475411.2016.1269027).
H. Azimi, F H. Tezel, J. Thibault, Effect of embedded activated carbon nanoparticles on the performance of polydimethylsiloxane (PDMS) membrane for pervaporation separation of butanol, J. Chem. Technol. Biotechnol., 2017, 92(12), 2901–2911 (https://onlinelibrary.wiley.com/doi/pdf/10.1002/jctb.5306).