https://orcid.org/0000-0002-8540-9010
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ABSTRACT
Isocyanate-functionalised graphene (iGO) was prepared and incorporated into a thermoplastic polyurethane via an in situ polymerisation. Firstly, graphene oxide was successfully modified using a mixture of isocyanate- and diisocyanate-containing compounds, leading to the formation of good dispersions of resulting functional graphene oxide in organic solvents, such as N,N-dimethylacetamide and N,N-dimethylformamide. The addition of iGO into polyurethane matrix improved both mechanical and thermal properties in the polyurethane/iGO composites relative to neat polyurethane. An addition of only 0.03 wt-% of functionalised graphene into the polyurethane increased Young’s modulus by 1.4 times and tensile strength by two times. Meanwhile, the elongation at break was similar to that of the neat polymer. In addition, dynamic mechanical analysis also confirmed the improvement in storage modulus of the polymer composites especially at high-temperature range. We believe that the developed modification approach for graphene oxide and polyurethane/graphene composites presented herein could be useful in polymer/graphene composite development.
Disclosure statement
No potential conflict of interest was reported by the authors.
Notes on contributors
Dr. Le Hoang Sinh completed his bachelor studies in material science (2006) at the University of Science (Hochiminh city) and obtained his PhD degree in 2012 under guidance of Professor Bae Jin Young at Sungkyunkwan University (South Korea). Thereafter, he worked as a post-doctoral researcher in the groups of Academy Professor Seppälä at Aalto University (Finland). He is currently vice-director of institute of research and development and director of center for advanced chemistry, Duy Tan University (Vietnam). His research interests include synthesis of biopolymers and their composites from bio-based resources, fabrication 3-D implanted biomedical devices by using stereolithography technique, graphene-based high performance composites, and graphene-based wearable/flexible electronic devices.
Dr Nguyen Dang Luong obtained his engineering degree in Polymer Science in 2002 at Hanoi University of Technology. He then worked at Daiwa Plastic Company and National Laboratory of Polymer Science and Engineering during 2002-2004. In 2009, he completed his PhD degree in Polymer Engineering at Sungkyunkwan University, supervised by Professor Jae-Do Nam. He moved to Finland and worked in Professor Jukka Seppälä’s research group at Aalto University from September 2010 to November 2016. Since November 2016 he has been working at PiBond Oy as a Senior Chemist, focusing on siloxane and metal organic polymers and metal oxide nanoparticles. Applications of these materials include high and low RI materials, spin on dielectrics, and photoresists especially EUV resists.
Jukka Seppälä, Dr.Sc. (Chem. Eng.), is professor of Polymer technology and vice dean in the School of Chemical Engineering at Aalto University. He gained his experience in the industry at Neste Corporation during 1979–1986. He acted as the Director of the Bio- and Nanopolymers Research Group in Finnish Academy Center of Excellence for the years 2001–2007. He has more than 380 scientific articles and the same number of other types of scientific publications. His h-index is 56 according to WoS. He is one of the inventors in around 50 patents and patent applications families. He became a member of the Finnish Academy of Sciences and Letters in the year 2005 and Member of Finnish Academy of Technology 2010. He has been nominated as Academy Professor for the years 2011–2015. He is the leader of the National Bio-Economy Infrastructure. In 2017 he was nominated as a Chief Engineering Counsellor in the Supreme Administrative Court of Finland.
ORCID
Le Hoang Sinh http://orcid.org/0000-0002-8540-9010