MONOGLYCERIDES TO PROTECT BIO-BASED INSULATION MATERIALS FROM MICROBIAL GROWTH

Author(s): Thomas Verdier, Alexandra Bertron, Camille Magniont, Mathilde Montibus and Philippe Evon
Paper category: Proceedings
Book title: Proceedings of the Final Conference of RILEM 253-MCI Microorganisms-Cementitious Materials Interactions Volume II
Editor(s): Alexandra Bertron and Henk Jonkers
ISBN: 978-2-35158-207-7 (Set)
ISBN: 978-2-35158-210-7 (Volume 2)
e-ISBN: 978-2-35158-206-0
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 581
Total Pages: 308
Language : English

Abstract: Under specific environmental conditions, microorganisms grow and may spread extensively on building materials. Their development leads to the deterioration of the colonized support and to the release of airborne microbial contaminants (spore, fungal fragments, toxins, mVOC...) that causes indoor air decay [1]. Due to cellulose and/or derivatives they contain, bio-based materials may be more sensitive to microbial growth and thus more sensitive to such degradation [2,3]. However, very few studies have shown the precise hygrometric conditions and the period of exposition to these conditions that allows microbial growth and spread on this type of support. Previous works have emphasized significant antimicrobial effect of certain glycerol esters that are valuable by-product of agro-industry [4]. Their use as antimicrobial coating could be an eco-friendly alternative to the classic ways of protecting bio-based building materials against microbial proliferation. Insulation bio-based materials have been casted with sunflower pith and extruded sunflower bark (i.e. depithed stalk) and treated with glycerol esters. The hygrometric conditions and times of exposure to these conditions that lead to microbial growth have been investigated for these materials. Then, the antimicrobial properties have been evaluated as well as the effect of the addition of glycerol esters on insulation properties and fire behaviour. A comparison with commercial insulating materials has been carried out in order to locate the developed materials on the insulation market.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00