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In Octobre of 2014 the Annual meeting on Inorganic and Material Chemistry took place in Lillestrom Norway. The Capdesign team of Sintef presented a poster.

The Effect of hybrid nanoparticle additives on barrier and mechanical properties of polymer blends as self-healing materials

1 Huaitian Bu, 1Juan Yang, 1Britt Sommer, 1Christian Simon, 1Ferdinand Männle,

2Sutima Chatrabhuti, 2Jean-Marie Raquez and 3Emmanuel Cailleux


1Materials and Nanotechnology Sector, SINTEF materials and Chemistry, Forskingsveien 1, 0314, Oslo, Norway

2Laboratory of Polymeric and Composite Materials (LPCM), Center of Innovation and Research in Materials and Polymers (CIRMAP), University of Mons, Place du Parc 23, B-7000 Mons, Belgium

3Belgian Building Research Institute (BBRI), Avenue Pierre Holoffe 21, B-1342 Limelette, Belgium



Self-healing materials, inspired from biological systems, have been attracting increasing research interests since the pilot's work by White in 2001 (White, 2001). These promising materials showed potential applications even in human's daily life; for examples repairing cracks in clothes, coatings for automotive and aerospace, buildings, roads etc.; offering new technology towards long-lasting, safety and cost effectiveness.

Capsule-based healing systems are one of the most commonly-used healing materials, where healing agents are encapsulated by a polymeric/inorganic shell and released either by external stimuli (temperature, pH etc) or mechanical force. The polymeric capsules should be able to protect the healing agent for a long time, and release the healing agent when cracking in a matrix material occurs. At the same time, the capsules should not influence the workability of the matrix.

In the present work, hydrophobically modified polyhedral oligomeric silsesquioxane (POSS) is used as an additive to improve barrier properties against oxygen and moisture. Moreover, the POSS is expected to enhance impact strength and static mechanical properties of polymer blends. These polymer blends will be extruded into a tubular shape then cut as capsule shells. Three commonly used polymer materials, PLA, PS and PMMA were blended with different amount of hybrid nanoparticle additives. The results show that modified POSS nanoparticles improve the impact strength of PLA blends from 0.5% POSS content. At 5% POSS, toughness drastically increased. Oxygen transmission rate and water transmission rate will be measured to test the barrier properties of the polymer blends.



S. R. White, N. R. Sottos, P. H. Geubelle, J. S. Moore, M. R. Kessler, S. R. Sriram, E. N. Brown & S. Viswanathan, Autonomic healing of polymer composites,

Nature 409, 794-797 (2001)




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