{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,4]],"date-time":"2026-09-04T15:58:27Z","timestamp":1788537507428,"version":"build-2803163510"},"reference-count":44,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2021,4,21]],"date-time":"2021-04-21T00:00:00Z","timestamp":1618963200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100002347","name":"Bundesministerium f\u00fcr Bildung und Forschung","doi-asserted-by":"publisher","award":["13GW0050C"],"award-info":[{"award-number":["13GW0050C"]}],"id":[{"id":"10.13039\/501100002347","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>Incorporating nanofillers into elastomers leads to composites with an enormous potential regarding their properties. Unfortunately, nanofillers tend to form agglomerates inhibiting adequate filler dispersion. Therefore, different carbon nanotube (CNT) pretreatment methods were analyzed in this study to enhance the filler dispersion in polydimethylsiloxane (PDMS)\/CNT-composites. By pre-dispersing CNTs in solvents an increase in electrical conductivity could be observed within the sequence of tetrahydrofuran (THF) &gt; acetone &gt; chloroform. Optimization of the pre-dispersion step results in an AC conductivity of 3.2 \u00d7 10\u22124 S\/cm at 1 Hz and 0.5 wt.% of CNTs and the electrical percolation threshold is decreased to 0.1 wt.% of CNTs. Optimum parameters imply the use of an ultrasonic finger for 60 min in THF. However, solvent residues cause a softening effect deteriorating the mechanical performance of these composites. Concerning the pretreatment of CNTs by physical functionalization, the use of surfactants (sodium dodecylbenzenesulfonate (SDBS) and polyoxyethylene lauryl ether (\u201cBrij35\u201d)) leads to no improvement, neither in electrical conductivity nor in mechanical properties. Chemical functionalization enhances the compatibility of PDMS and CNT but damages the carbon nanotubes due to the oxidation process so that the improvement in conductivity and reinforcement is superimposed by the CNT damage even for mild oxidation conditions.<\/jats:p>","DOI":"10.3390\/polym13091355","type":"journal-article","created":{"date-parts":[[2021,4,21]],"date-time":"2021-04-21T21:25:10Z","timestamp":1619040310000},"page":"1355","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Influence of Carbon Nanotube-Pretreatment on the Properties of Polydimethylsiloxane\/Carbon Nanotube-Nanocomposites"],"prefix":"10.3390","volume":"13","author":[{"given":"Astrid","family":"Diekmann","sequence":"first","affiliation":[{"name":"Deutsches Institut f\u00fcr Kautschuktechnologie e. V., Eupener Stra\u00dfe 33, 30519 Hannover, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marvin C. V.","family":"Omelan","sequence":"additional","affiliation":[{"name":"Deutsches Institut f\u00fcr Kautschuktechnologie e. V., Eupener Stra\u00dfe 33, 30519 Hannover, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ulrich","family":"Giese","sequence":"additional","affiliation":[{"name":"Deutsches Institut f\u00fcr Kautschuktechnologie e. V., Eupener Stra\u00dfe 33, 30519 Hannover, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,4,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"603","DOI":"10.1038\/363603a0","article-title":"Single-shell carbon nanotubes of 1-nm diameter","volume":"363","author":"Iijima","year":"1993","journal-title":"Nature"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Ma, P.-C., and Kim, J.-K. (2010). Carbon Nanotubes for Polymer Reinforcement, Taylor and Francis Group.","DOI":"10.1201\/b10795"},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Grady, B.P. (2011). Carbon Nanotubes Polymer Composites, John Wiley & Sons.","DOI":"10.1002\/9781118084380"},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Ajayan, P.M., Schadler, L.S., and Braun, P.V. (2004). Nanocomposite Science and Technology, Wiley-VCH.","DOI":"10.1002\/3527602127"},{"key":"ref_5","first-page":"8446","article-title":"Carbon nanotube based elastomer composites\u2014An approach towards multifunctional materials","volume":"2","author":"Ponnamma","year":"2014","journal-title":"J. Mater. Chem."},{"key":"ref_6","first-page":"45","article-title":"Application of carbon nano tubes in specialty rubbers\u2014Potential and properties","volume":"69","author":"Chougule","year":"2016","journal-title":"KGK"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"38","DOI":"10.1016\/S1369-7021(04)00507-3","article-title":"Nanocomposites: Issues at the interface","volume":"7","author":"Wagner","year":"2004","journal-title":"Mater. Today"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"285","DOI":"10.5254\/rct.17.82665","article-title":"Facile functionalization of sp2 carbon allotropes with a biobased janus molecule","volume":"90","author":"Galimberti","year":"2017","journal-title":"Rubber Chem. Technol."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"1832","DOI":"10.1002\/adfm.200500290","article-title":"Single-walled carbon nanotube dispersion in poly (ethylene oxide)","volume":"15","author":"Chatterjee","year":"2005","journal-title":"Adv. Funct. Mater."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"2135","DOI":"10.1016\/j.compscitech.2009.05.014","article-title":"Advanced elastomer nano-composites based on CNT-hybrid filler systems","volume":"69","author":"Lorenz","year":"2009","journal-title":"Compos. Sci. Technol."},{"key":"ref_11","first-page":"22","article-title":"Development of soft electrical conductive PDMS\/CNT-composites with extremely low CNT content","volume":"73","author":"Omelan","year":"2020","journal-title":"KGK"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"5276","DOI":"10.1016\/j.polymer.2008.09.031","article-title":"Modified and unmodified multiwalles carbon nanotubes in high performance solution-styrene-butadiene and butadiene rubber blends","volume":"49","author":"Das","year":"2008","journal-title":"Polymer"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"28","DOI":"10.1002\/vnl.21477","article-title":"A comparative study on dispersion of carbon nanotubes in (styrene-butadiene rubber)-based nanocomposites","volume":"23","author":"Salimi","year":"2017","journal-title":"Vinyl Addit. Technol."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"4993","DOI":"10.1002\/app.35608","article-title":"Optimized process for the inclusion of carbon nanotubes in elastomers with improved thermal and mechanical properties","volume":"124","author":"Cadambi","year":"2012","journal-title":"Appl. Polym. Sci."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Srivastava, S.K., and Mishra, Y.K. (2018). Nanocarbon reinforced rubber nanocomposites: Detailed insights about mechanical, dynamical mechanical properties, payne, and mullins effects. Nanomaterials, 8.","DOI":"10.20944\/preprints201809.0464.v1"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"551","DOI":"10.1002\/mame.200900131","article-title":"CNT based elastomer-hybrid-nanocomposites with promising mechanical and electrical properties","volume":"294","author":"Fritzsche","year":"2009","journal-title":"Macromol. Mater. Eng."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"579","DOI":"10.1177\/0021998312443394","article-title":"Sonication effect on the mechanical properties of MWCNTs reinforced natural","volume":"47","author":"Tarawneh","year":"2013","journal-title":"J. Compos. Mater."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"211","DOI":"10.1080\/19475411.2015.1121632","article-title":"Carbon nanotube-reinforced elastomeric nanocomposites: A review","volume":"6","author":"Mensah","year":"2015","journal-title":"Int. J. Smart Nano Mater."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"567","DOI":"10.1134\/S0965545X16040131","article-title":"The physical and mechanical properties and cure characteristics of NBR\/silica\/MWCNT hybrid composites","volume":"58","author":"Salehi","year":"2016","journal-title":"Polym. Sci. Ser."},{"key":"ref_20","first-page":"40","article-title":"Eigenschaftsprofil von Carbon Nanotubes in Silikonkautschuk","volume":"64","author":"Zimmermann","year":"2011","journal-title":"KGK"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"1108","DOI":"10.1109\/TDEI.2005.1561790","article-title":"Silicone rubber dielectrics modified by inorganic fillers for outdoor high voltage insulation applications","volume":"12","author":"Cherney","year":"2005","journal-title":"IEEE Trans. Dielectr. Electr. Insul."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"394","DOI":"10.1177\/0095244313514991","article-title":"Impedance analysis, dielectric relaxation, and electrical conductivity of multi-walled carbon nanotube-reinforced silicon elastomer nanocomposites","volume":"47","author":"Saji","year":"2015","journal-title":"J. Elastomers Plast."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"450","DOI":"10.1002\/pi.5283","article-title":"Synergistic effects of hybrid carbon nanomaterials in room-temperature-vulcanized silicone rubber","volume":"66","author":"Kumar","year":"2017","journal-title":"Polym. Int."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"13157","DOI":"10.3390\/molecules171113157","article-title":"Effect of surfactants and manufacturing methods on the electrical and thermal conductivity of carbon nanotube\/silicone composites","volume":"17","author":"Vilcakova","year":"2012","journal-title":"Molecules"},{"key":"ref_25","first-page":"1","article-title":"Simple and cost-effective method of highly conductive and elastic carbon nanotube\/polydimethylsiloxane composite for wearable electronics","volume":"8","author":"Kim","year":"2018","journal-title":"Sci. Rep."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"10841","DOI":"10.1039\/C6RA25350D","article-title":"Stretchable electromagnetic-interference shielding materials made of a long single-walled carbon-nanotube-elastomer composite","volume":"7","author":"Kato","year":"2017","journal-title":"RSC Adv."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"64","DOI":"10.1016\/j.compscitech.2016.12.014","article-title":"The effect of filler dimensionality on the electromechanical performance of polydimethylsiloxane based conductive nanocomposites for flexible strain sensors","volume":"139","author":"Zheng","year":"2017","journal-title":"Compos. Sci. Technol."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"1257","DOI":"10.1016\/j.compscitech.2012.04.012","article-title":"Electrical and mechanical characterization of stretchable multi-walled carbon nanotubes\/polydimethylsiloxane elastomeric composite conductors","volume":"72","author":"Lee","year":"2012","journal-title":"Compos. Sci. Technol."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"444","DOI":"10.1016\/j.carbon.2011.08.070","article-title":"Single-walled carbon nanotube\/silicone rubber composites for complaint electrodes","volume":"50","author":"Kim","year":"2012","journal-title":"Carbon"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"309","DOI":"10.1016\/j.matlet.2017.09.051","article-title":"Polydimethylsiloxane-multiwalled carbon nanotube composites as a metamaterial","volume":"210","author":"Shetty","year":"2018","journal-title":"Mater. Lett."},{"key":"ref_31","unstructured":"Pazat, A. (2017). Chemical Modification of Graphite-Based Derivates and Their Uses in Elastomer Nanocomposites. [Ph.D. Thesis, Lyon University]."},{"key":"ref_32","first-page":"49","article-title":"Oxidation of multiwalled carbon nanotubes using different oxidation agents like nitric acid and potassium permanganate","volume":"4","author":"Malikov","year":"2014","journal-title":"News Baku Univ."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"24","DOI":"10.1016\/j.carbon.2010.08.034","article-title":"Surface and structural characterization of multi-walled carbon nanotubes following different oxidative treatments","volume":"49","author":"Wepasnick","year":"2011","journal-title":"Carbon"},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"14290","DOI":"10.1039\/C6RA28868E","article-title":"Tuning the surface chemistry of graphene flakes: New strategies for selective oxidation","volume":"7","author":"Soares","year":"2017","journal-title":"RSC Adv."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"880","DOI":"10.1016\/j.compscitech.2005.12.033","article-title":"Preparation and electrical characterization of a silicone elastomer composite charged with multi-wall carbon nanotubes functionalized with 7-octenyltrichlorosilane","volume":"67","author":"Vast","year":"2007","journal-title":"Compos. Sci. Technol."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1002\/pen.23530","article-title":"Electrically conductive multiphase polymer blend carbon-based composites","volume":"54","author":"Brigandi","year":"2014","journal-title":"Polym. Eng. Sci."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"67","DOI":"10.1007\/s10853-012-6658-x","article-title":"Polyurethane conductive blends and composites: Synthesisand applications perspective","volume":"48","author":"Gurunathan","year":"2013","journal-title":"J. Mater. Sci."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"548","DOI":"10.1016\/j.matdes.2012.09.029","article-title":"Silicone rubber nanocomposites containing a small amount of hybrid fillers with enhanced electrical sensitivity","volume":"45","author":"Witt","year":"2013","journal-title":"Mater. Des."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"123","DOI":"10.1016\/j.colsurfa.2013.11.001","article-title":"Attempts to control depletion in the surfactant-assisted stabilization of single-walled carbon nanotubes","volume":"443","author":"Tardani","year":"2014","journal-title":"Colloids Surf. A Physicochem. Eng. Asp."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"1081","DOI":"10.1016\/j.envpol.2008.09.039","article-title":"Surfactive stabilization of multi-walled carbon nanotube dispersions with dissolved humic substances","volume":"157","author":"Chappel","year":"2009","journal-title":"Environ. Pollut."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"23","DOI":"10.1016\/j.carbon.2004.08.015","article-title":"Electrical conductivity of chemically modified multiwalled carbon nanotube\/epoxy composites","volume":"43","author":"Kim","year":"2005","journal-title":"Carbon"},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"399","DOI":"10.1016\/j.jhazmat.2014.08.023","article-title":"Simultaneous adsorption and reduction of U(VI) on reduced graphene oxide-supported nanoscale zerovalent iron","volume":"280","author":"Sun","year":"2014","journal-title":"J. Hazard. Mater."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"1835","DOI":"10.1016\/j.carbon.2010.01.029","article-title":"Combined XPS and TPD study of oxygen-functionalized carbon nanofibers grown on sintered metal fibers","volume":"48","author":"Rosenthal","year":"2010","journal-title":"Carbon"},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"299","DOI":"10.1016\/j.jcat.2011.07.002","article-title":"Chemoselective hydrogenation of cinnamaldehyde: A comparison of the immobilization of Ru-phosphine complex on graphite oxide and on graphitic surfaces","volume":"282","author":"Dongil","year":"2011","journal-title":"J. Catal."}],"container-title":["Polymers"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2073-4360\/13\/9\/1355\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T05:50:49Z","timestamp":1760161849000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2073-4360\/13\/9\/1355"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,4,21]]},"references-count":44,"journal-issue":{"issue":"9","published-online":{"date-parts":[[2021,5]]}},"alternative-id":["polym13091355"],"URL":"https:\/\/doi.org\/10.3390\/polym13091355","relation":{},"ISSN":["2073-4360"],"issn-type":[{"value":"2073-4360","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,4,21]]}}}