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Large strain and toughness enhancement of poly(dimethyl siloxane) composite films filled with electrospun polyacrylonitrile-graft-poly(dimethyl siloxane) fibres and multi-walled carbon nanotubes
KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknik, Polymera material.
2011 (Engelska)Ingår i: Polymer, ISSN 0032-3861, E-ISSN 1873-2291, Vol. 52, nr 18, s. 4061-4072Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Unfilled cross-linked poly(dimethyl siloxane) (PDMS) is a weak material and is generally filled with high levels of particulate fillers such as silica, calcium carbonate and carbon black to improve its mechanical properties. The use of fibrous fillers such as electrospun nanofibres and multi-walled carbon nanotubes as fillers for PDMS has not been widely studied. In this study anew copolymer, polyacrylonitrile-graft-poly(dimethyl siloxane) (PAN-g-PDMS), is used as fibrous filler for PDMS. The graft copolymer is electrospun to produce the fibre filler material. It is shown how the PDMS content of the graft copolymer provides increased compatibility with silicone matrices and excellent dispersion of the fibre fillers throughout a silicone matrix. It is also shown that it is possible to include multi-walled carbon nanotubes in the electrospun fibres which are subsequently dispersed in the PDMS matrix. Fibre mats were used in the non-woven and the aligned forms. The differently prepared fibre composites have significantly different mechanical properties. Conventional composites using fibrous fillers usually show increased strength and stiffness but usually with a resultant loss of strain. In the case of the composites produced in this study there is a dramatic improvement in the extensibility of the non-woven PAN-g-PDMS fibre mat filled silicone films of up to 470%.

Ort, förlag, år, upplaga, sidor
2011. Vol. 52, nr 18, s. 4061-4072
Nyckelord [en]
Electrospinning, Nano-composites, Multi-walled carbon nanotubes
Nationell ämneskategori
Polymerkemi
Identifikatorer
URN: urn:nbn:se:kth:diva-39513DOI: 10.1016/j.polymer.2011.06.011ISI: 000294316200021Scopus ID: 2-s2.0-80051816734OAI: oai:DiVA.org:kth-39513DiVA, id: diva2:442230
Forskningsfinansiär
VetenskapsrådetTillgänglig från: 2011-09-20 Skapad: 2011-09-12 Senast uppdaterad: 2017-12-08Bibliografiskt granskad

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