U
Ulla Hippi
Researcher at Aalto University
Publications - 15
Citations - 1397
Ulla Hippi is an academic researcher from Aalto University. The author has contributed to research in topics: Compatibilization & Cellulose. The author has an hindex of 12, co-authored 15 publications receiving 1248 citations. Previous affiliations of Ulla Hippi include Helsinki University of Technology.
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Journal ArticleDOI
A fast method to produce strong NFC films as a platform for barrier and functional materials.
Monika Österberg,Jari Vartiainen,Jessica Lucenius,Ulla Hippi,Jukka Seppälä,Ritva Serimaa,Janne Laine +6 more
TL;DR: A simple method using surface coating with wax to improve hydrophobicity and oxygen barrier properties at very high humidity is described, and the developed robust NFC films can be used as a generic, environmentally sustainable platform for functional materials.
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Graphene/cellulose nanocomposite paper with high electrical and mechanical performances
Nguyen Dang Luong,Nikolaos Pahimanolis,Ulla Hippi,Juuso T. Korhonen,Janne Ruokolainen,Leena-Sisko Johansson,Jae-Do Nam,Jukka Seppälä +7 more
TL;DR: Graphene/cellulose nanocomposite paper with high mechanical and electrical performances was reported in this paper by combining reduced graphene oxide sheets (RGO) and amine-modified nanofibrillated cellulose (A-NFC) in a well-controlled manner.
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Enhanced mechanical and electrical properties of polyimide film by graphene sheets via in situ polymerization
Nguyen Dang Luong,Ulla Hippi,Juuso T. Korhonen,Antti J. Soininen,Janne Ruokolainen,Leena-Sisko Johansson,Jae-Do Nam,Le Hoang Sinh,Jukka Seppälä +8 more
TL;DR: In this article, a polyimide/graphene nanocomposite film was successfully fabricated, which exhibited significant enhancements in mechanical properties and electrical conductivity, and Young's modulus was dramatically increased from 1.8 GPa to 2.3 GPa.
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Free radical graft copolymerization of nanofibrillated cellulose with acrylic monomers
Kuisma Littunen,Ulla Hippi,Leena-Sisko Johansson,Monika Österberg,Tekla Tammelin,Janne Laine,Jukka Seppälä +6 more
TL;DR: In this paper, a redox-initiated free radical method was used to copolymerize nanofibrillated cellulose (NFC) in aqueous suspension.
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Compatibilization of polyethylene/aluminum hydroxide (PE/ATH) and polyethylene/magnesium hydroxide (PE/MH) composites with functionalized polyethylenes
TL;DR: In this article, the effect of polymeric compatibilizers on the properties of the composites was studied by tensile and impact tests, dynamic mechanical analysis, differential scanning calorimetry, morphology studies, and flammability tests.