New biobased foams from wood byproducts

Merle, Juliette; Birot, Marc; Deleuze, Hervé; Mitterer, Claudia; Carré, Hélène; Bouhtoury, Fatima Charrier–El

doi:10.1016/j.matdes.2015.11.076

Cited by 53 publications

(37 citation statements)

References 42 publications

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“…Numerous studies have explored the possibility of developing foams from biomass [ 5 , 6 , 7 ]. The bulk of these studies have investigated the possibility of producing polyurethane foams from vegetable oils.…”

Section: Introductionmentioning

confidence: 99%

Cellulose Fibre-Reinforced Biofoam for Structural Applications

et al. 2017

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Traditionally, polymers and macromolecular components used in the foam industry are mostly derived from petroleum. The current transition to a bio-economy creates demand for the use of more renewable feedstocks. Soybean oil is a vegetable oil, composed mainly of triglycerides, that is suitable material for foam production. In this study, acrylated epoxidized soybean oil and variable amounts of cellulose fibres were used in the production of bio-based foam. The developed macroporous bio-based architectures were characterised by several techniques, including porosity measurements, nanoindentation testing, scanning electron microscopy, and thermogravimetric analysis. It was found that the introduction of cellulose fibres during the foaming process was necessary to create the three-dimensional polymer foams. Using cellulose fibres has potential as a foam stabiliser because it obstructs the drainage of liquid from the film region in these gas-oil interfaces while simultaneously acting as a reinforcing agent in the polymer foam. The resulting foams possessed a porosity of approximately 56%, and the incorporation of cellulose fibres did not affect thermal behaviour. Scanning electron micrographs showed randomly oriented pores with irregular shapes and non-uniform pore size throughout the samples.

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Section: Introductionmentioning

confidence: 99%

Cellulose Fibre-Reinforced Biofoam for Structural Applications

et al. 2017

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“…Composite B had the highest compression strength and composite A the lowest. As shown in Figure 10, the compressive strength increased with apparent density and crosslinking density [30], which were induced by the quantity of binder, in composites B, C, and D. Composite A did not fit with this curve because the wheat straw was not previously infused. Thus, it was more difficult to have a homogeneous crosslinking density since the solubles that allow gluing were not in solution.…”

Section: Resultsmentioning

confidence: 99%

Hemp-Straw Composites: Gluing Study and Multi-Physical Characterizations

et al. 2019

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In order to meet the requirement of sustainable development, building materials are increasingly environmentally friendly. They can be partially or fully bio-based or recycled. This paper looks at the development of fully bio-based composites where agro-resources are valued as bio-based aggregates (hemp) and as binding materials (wheat). In a previous work, a feasibility study simultaneously investigated the processing and ratio of wheat straw required to ensure a gluing effect. In this paper, three kinds of hemp-straw composites are selected and compared with a hemp-polysaccharides composite. The gluing effect is analyzed chemically and via SEM. The developed composites were characterized multi-physically. They showed sufficiently high mechanical properties to be used as insulating materials. Furthermore, they showed good thermal performances with a low thermal conductivity (67.9–69.0 mW/(m · K) at 23 ° C, dry).

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“…The compression resistance of the foams was tested, and the results are presented in Figure 2. It can be observed that the compression curves of the foams can be divided into three stages: the elastic behavior of the foam's cell wall bending, cell collapse, and densification [29]. The compression curve of Foam F1 is higher than that of the other two curves, which is mainly due to the difference in the relative proportion of the furfuryl alcohol used.…”

Section: Physical Properties Of Furanic-glyoxal Foamsmentioning

confidence: 98%

Characterization and Preparation of Furanic-Glyoxal Foams

Pizzi

Lei

et al. 2020

Polymers

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Synthetic foams have become an essential industrial product for a great variety of applications. Furfuryl alcohol, as a biomass chemical, was reacted with glyoxal at room temperature to prepare furanic-glyoxal rigid foams, and p-toluenesulfonic acid was used as a catalyst to initiate the reaction. Foams with different molar ratios (furfuryl alcohol/glyoxal) were prepared in this work, and uniform cells foams have been obtained. Their compression resistance, 24-h water absorption, density, and other basic properties were tested. Scanning electron microscopy (SEM) was used to observe the cellular morphology of the foams prepared, thermogravimetric analysis (TGA) helped to understand their thermal and combustion properties, and FTIR and Matrix Assisted Laser Desorption Ionisation Time of Flight (MALDI ToF) mass spectroscopy to explain the structure of the resulting foams to clarify the reactions occurring during foaming. The results show that the compression resistance of furanic-glyoxal foams declined as the furfuryl alcohol/glyoxal ratio decreases also. SEM observations revealed that foams with open-cell were obtained when furfuryl alcohol was added in greater amounts, and more closed cell structures were formed as the proportion of glyoxal increased. TGA results showed that the initial ignition temperature of furanic-glyoxal foams is ~200 °C higher than that of wood, and the smaller comprehensive combustion index S (about 0.15 × 10−7 (%2 K−3 min−2)) indicates that the foam burns slowly and has poor flammability, that is, it is not easy to burn.

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New biobased foams from wood byproducts

Cited by 53 publications

References 42 publications

Cellulose Fibre-Reinforced Biofoam for Structural Applications

Cellulose Fibre-Reinforced Biofoam for Structural Applications

Hemp-Straw Composites: Gluing Study and Multi-Physical Characterizations

Characterization and Preparation of Furanic-Glyoxal Foams

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