Hello everyone! I am searching a way for increasing the electrical conductivity of the PDMS polymer. I want to produce an anode with this polymer. Previously, our research group prepare PDMS/MWCNT nanocomposite by shear mixing PDMS with MWCNTs. But this nanocomposite's electrical conductivity was approximately 90 mS/m with ratio of MWCNT is 4.5 wt% . As you guess this value is pretty low. Therefore, I am thinking couple of approaches for solving this problem like preparing nanocomposite with
-functionalized MWCNT (MWCNT-COOH or MWCNT-NH2) and PDMS, or
-exploiated graphite (or maybe graphene nanoplatelets)/MWCNT/PDMS nanocomposite, or
-metal oxide (like TiO2, SnO2)/MWCNT/PDMS nanocomposite, or
-metallic nanoparticles (or microparticles)/PDMS nanocomposite.
Do any of these approaches will work? If it will work, could you please explain me how much the electrical conductivity will increase? Do you know different appraches other than these?
Metal NPs would be better than other systems. You may see the attached papers'
Article Novel PDMS Leaky Waveguide with Self-assembled Gold Nano-Par...
https://pubs.rsc.org/en/content/articlepdf/2016/sc/c6sc01150k?page=search
http://staff.ustc.edu.cn/~jianglab/fulltexts/72.pdf
Try Ag nanowires. You can grow an array in PDMS. Check the article for some details around the wires:
Highly stretchable and sensitive strain sensor based on silver nanowire–elastomer nanocomposite
Authors Morteza Amjadi, Aekachan Pichitpajongkit, Sangjun Lee, Seunghwa Ryu, Inkyu Park
I agree with Md. Abdur Rahman, you can try to add metal nanoparticles,such as gold or silver.
https://openi.nlm.nih.gov/detailedresult.php?img=PMC4029640_sensors-14-06952f1&req=4
Article Electrically Conducting PDMS Nanocomposite Using In Situ Red...
Sorry, I don't know, how exactly the conductivity will increase, but you can try to find some info here.
Article Microengineered Conductive Elastomeric Electrodes for Long-T...
Minimize the level of oxidation of MWCNT. try to intercalate carbon fiber with or without nano-particle.
Article MWCNT coated free-standing carbon fiber fabric for enhanced ...
In addition to the good suggestions above, if you are trying to make the contact with your PDMS/MWCNT on the surface, it is likely almost pure PDMS there, you may try cutting off a thin layer or otherwise ensuring you actually reach the MWCNT network inside.
Look at this site http://tuball.com/en/additives/matrix/601/
Good luck!
you can also try glycerol or ethylene glycol as a second additive together with CNTs. See Figure S2: Data Supporting information
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