Performance of cork and ceramic matrix composite joints for re-entry thermal protection structures

Triantou, K.; Perez, B.; Marinou, A.; Flórez, Sonia; Mergia, K.; Vekinis, G.; Bárcena, J.; Rotärmel, Waldemar; Zuber, Christian; Montbrun, Agnes de

doi:10.1016/j.compositesb.2016.09.104

Cited by 19 publications

(11 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to its interesting morphology and structure, several cork-based composite materials were developed for different technological applications [15]. However, relatively few studies have been performed on the use of cork as a template agent, to prepare biomorphic materials or…”

Section: A C C E P T E D Mmentioning

confidence: 99%

A sustainable multi-function biomorphic material for pollution remediation or UV absorption: Aerosol assisted preparation of highly porous ZnO-based materials from cork templates

Quarta

Novais

Bettini

et al. 2019

Journal of Environmental Chemical Engineering

View full text Add to dashboard Cite

For the first time, highly porous ZnO-based biomorphic materials were synthesised using cork as a natural sustainable template. In the first step, waste cork powder was pyrolysed and converted into inorganic carbon. This template was then infiltrated using a novel approach employing an aerosol of zinc-containing solutions. The infiltrated powders were calcined to convert the precursors into zinc oxide. Depending on temperature, these could form either a ZnO-graphite composite material, or pure ZnO. Their morphology, porosity, microstructure and composition were characterised; their optical band gap energies, ability to adsorb and photodegrade organic pollutants and UV absorption were also assessed. When heated to 350 o C they maintained the 3D porous cork structure, producing a graphite-containing composite material, with both physical adsorption and photocatalytic activity (Eg = 3.19 eV), suitable for environmental remediation. When heated to 700 ºC, the powders were pure ZnO (no graphite), and they absorbed in the UV region, hence suitable for use as sunscreen. Doped ZnO ecoceramics were also produced, using silver and aluminium. An addition of 1 mol% Ag 3 improved photocatalysis under solar light. Conversely, adding 2 mol% Al and calcining at 700 ºC deactivated photocatalysis, but maintained strong UV absorption, producing a safer sunscreen material (no generation of free radicals). This is the first time that photocatalytic or UV absorption properties of any wood-derived biomorphic material or ecoceramic have been reported.

show abstract

Section: A C C E P T E D Mmentioning

confidence: 99%

A sustainable multi-function biomorphic material for pollution remediation or UV absorption: Aerosol assisted preparation of highly porous ZnO-based materials from cork templates

Quarta

Novais

Bettini

et al. 2019

Journal of Environmental Chemical Engineering

View full text Add to dashboard Cite

show abstract

“…Along with wood, cork is one of the most used forest products due to its inborn single set of properties . Most commercial exploited cork is harvested from the cork oak ( Quercus suber L.) bark and its use as a raw material extends to a wide range of products applied in construction, transport and design, including technologically demanding applications, as seals and insulation materials for aerospace vehicles . Beyond the Q. suber L., cork is a ubiquitous tissue with exploitable amounts in other barks .…”

Section: Introductionmentioning

confidence: 99%

“…demanding applications, as seals and insulation materials for aerospace vehicles. [4][5][6] Beyond the Q. suber L., cork is a ubiquitous tissue with exploitable amounts in other barks. 7 Despite the differences between the barks and corks of the various tree species, e.g.…”

mentioning

confidence: 99%

A methodological approach for the simultaneous quantification of glycerol and fatty acids from cork suberin in a single GC run

Marques

Pereira

2019

Phytochemical Analysis

View full text Add to dashboard Cite

Introduction Suberin, as part of plant protective barriers, is one of the most important natural polymers after cellulose and lignin. For a full elucidation of suberin structure the quantification of glycerol, fatty α,ω‐diacids and ω‐hydroxyacids, the major building blocks of suberin, is of primary importance. Glycerol is often lost in the most used analytical procedures or rarely determined by deficient or too laborious techniques. Objectives Propose a simple, accessible and reliable methanolysis work‐up procedure for an accurate and simultaneous quantification of glycerol and suberin fatty monomers in the same GC run. Material and methods Cork from Quercus suber L. was depolymerised by methanolysis. Glycerol was derivatised to an organic soluble form before the suberin monomers recovery in water/organic solvent partition. Gas chromatography flame ionisation detector (GC‐FID) response factors were determined for glycerol, ferulic acid and one for each fatty monomer substructure. Additionally, 1,2,4‐butanetriol and methyl nonadecanoate were used as internal standards. Results The proposed experimental approach allowed the glycerol and all the fatty suberin monomers in the same GC run to be quantified accurately. Glycerol represented 30.6 area%, 14.2 mass% and 38.4 molar% of suberin and the COOH/OH groups ratio was 0.6:1 in the proposed experimental approach in contrast with 0.10 area% and COOH/OH ratio of 3:1 in the most used protocol. Furthermore, ω‐hydroxyacids/α,ω‐diacids mass ratio was 1:1 as opposed to an area ratio of 1.5:1. Conclusion The proposed work‐up procedure revealed to be a reliable analytical tool for the complete analysis of suberin allowing the future knowledge to grow towards a better understanding of suberin structure throughout its range and variability.

show abstract

“…In this regard, agglomerated cork, which is a mixture of natural cork and an organic binder (typically polyurethane), can be considered as an alternative to synthetic foams currently used in structural applications with a significant energy absorption ability. In addition, cork shows reduced permeability to liquids and gases and thermal insulation properties with a distinctive mechanical behavior resulting in nonlinear elasticity, exceptional compressibility without fracture, and unusual dimensional recovery capability, which enables outstanding energyabsorbing performance (Sargianis, Kim, and Suhr 2012;Silva et al 2005;Pereira 2007;Fernandes, Pascoal, and Alves de Sousa 2014;Triantou et al 2017;Zhuang et al 2017;Barbosa et al 2017). Several studies on cork and related sandwich structures are available in literature but with a strong focus on quasi-static properties, such as compression, tensile, and shear (Gameiro, Cirne, and Gary 2007;Mancuso, Pitarresi, and Tumino 2015;Alcântara, Teixeira-Dias, and Paulino 2013;Moreira, De Melo, and Dias Rodrigues 2010;Reis et al 2007;Reis and Silva 2009;Oliveira, Rosa, and Pereira 2014).…”

Section: Introductionmentioning

confidence: 99%

Impact behavior of sandwich structures made of flax/epoxy face sheets and agglomerated cork

Sarasini

Tirillò

Lampani

et al. 2018

Journal of Natural Fibers

View full text Add to dashboard Cite

The unremitting quest of natural and renewable materials able to replace their synthetic counterparts in high-performance applications has involved also sandwich structures. In this regard, the aim of this work is to characterize the impact response, in both high-and low-velocity conditions, of green sandwich structures made of agglomerated cork as core and flax/epoxy laminates as face sheets. Both bare cork, flax skins, and complete sandwich structures were subjected to impacts at three different energy levels representing the 25%, 50%, and 75% of the respective perforation thresholds. A gas gun was instead used to assess the high-velocity impact behavior of these green sandwich structures and evaluate their ballistic limit. This study shows that the buckling of cell walls of agglomerated cork enables to tailor the damage extension through-the-thickness in low-velocity impacts compared to traditional synthetic foams coupled with a considerable amount of energy absorption.

show abstract

Performance of cork and ceramic matrix composite joints for re-entry thermal protection structures

Cited by 19 publications

References 12 publications

A sustainable multi-function biomorphic material for pollution remediation or UV absorption: Aerosol assisted preparation of highly porous ZnO-based materials from cork templates

A sustainable multi-function biomorphic material for pollution remediation or UV absorption: Aerosol assisted preparation of highly porous ZnO-based materials from cork templates

A methodological approach for the simultaneous quantification of glycerol and fatty acids from cork suberin in a single GC run

Impact behavior of sandwich structures made of flax/epoxy face sheets and agglomerated cork

Contact Info

Product

Resources

About