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Title: Bio‐Based Piezo‐ and Thermoresistive Photocurable Sensing Materials from Acrylated Epoxidized Soybean Oil

Journal Article · · Macromolecular Materials and Engineering
ORCiD logo [1];  [2];  [3];  [4];  [5]
  1. BCMaterials Basque Center for Materials Applications and Nanostructures UPV/EHU Science Park Leioa 48940 Spain, Dipartimento di Scienza Applicata e Tecnologia (DISAT) Politecnico di Torino C.so Duca Degli Abruzzi 24 Torino 10129 Italy
  2. Center of Physics University of Minho Campus de Gualtar Braga 4710‐057 Portugal, Institute for Polymers and Composites IPC University of Minho Guimarães 4804‐533 Portugal
  3. Dipartimento di Scienza Applicata e Tecnologia (DISAT) Politecnico di Torino C.so Duca Degli Abruzzi 24 Torino 10129 Italy, Center for Sustainable Future Technologies Istituto Italiano di Tecnologia Via Livorno 60 Torino 10144 Italy
  4. Dipartimento di Scienza Applicata e Tecnologia (DISAT) Politecnico di Torino C.so Duca Degli Abruzzi 24 Torino 10129 Italy
  5. BCMaterials Basque Center for Materials Applications and Nanostructures UPV/EHU Science Park Leioa 48940 Spain, Ikerbasque Basque Foundation for Science Bilbao 48009 Spain

Abstract Bio‐based photocurable polymers are increasingly in demand as environmentally friendly materials for advanced applications. Together with functional fillers, these represent a next step for the generation of functional and active smart materials, compatible with additive manufacturing technologies. Herein, acrylated epoxidized soybean oil (AESO) mixed with different amounts of reduced graphene oxide (rGO) up to 6 wt% in order to obtain UV‐curable piezoresistive and thermoresistive materials, is reported. It is shown that the addition of rGO to AESO hinders the curing process, but always maintains double bond conversions higher than 50%. Composites are characterized by a good dispersion of micrometric filler clusters. Further, the thermal stabilities are close to 300 °C and crosslinking degrees are above 1.75 mmol cm –3 . The Young modulus of the composites decreases with the addition of the rGO fillers, in particular for the higher filler contents, and electrical conductivities up to 0.13 S m –1 are obtained for the composites with the highest rGO content. UV‐curable composites with piezoresistive and thermoresistive responses suitable for applications are thus obtained, characterized by gauge factors around 26 for deformations up to 2% and maximum thermoresistive sensitivity of S = 0.43, values similar to the values obtained for petroleum‐based materials.

Sponsoring Organization:
USDOE
OSTI ID:
1876501
Journal Information:
Macromolecular Materials and Engineering, Journal Name: Macromolecular Materials and Engineering Vol. 307 Journal Issue: 7; ISSN 1438-7492
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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