On filtration and heat insulation properties of foam formed cellulose based materials

Jahangiri, Pouyan; Korehei, Reza; Zeinoddini, Sadaf S.; Madani, A.; Sharma, Yash; Phillion, A.B.; Martinez, D. Mark; Olson, James A.

doi:10.3183/npprj-2014-29-04-p584-591

Cited by 47 publications

(25 citation statements)

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“…There is an increased drive to replace lightweight products derived from petrochemicals, such as expanded polystyrene, polyurethane and phenolic foam with new, sustainable and environmentally friendly materials. Low density materials made using natural fibres can play a role in this endeavour, provided it is possible to match the properties of the existing materials in relation to thermal [ 1 ] and acoustic [ 2 ] insulation, fire retardancy and mechanical strength for packing materials [ 3 , 4 ]. The foam-forming technique may offer a promising route to create non-woven natural materials from cellulose, peat or spent grain, with characteristics that can be tuned via controlling properties of the foam used for their production.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the foam-forming of non-woven lightweight fibrous materials using X-ray tomography

et al. 2021

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Foam-forming has in the past predominantly been used to create two-dimensional sheet-like fibrous materials. Allowing the foam to drain freely and decay under gravity, rather than applying a vacuum to remove it rapidly, we can produce lightweight three-dimensional fibrous structures from cellulose fibres, of potential use for thermal and acoustic insulation. $$\mu$$ μ CT scanning of the fibrous materials enable us to determine both void size distributions and also distributions of fibre orientations. Through image analysis and uniaxial compression testing, we find that the orientation of the fibres, rather than the size of the voids, determine the compressive strength of the material. The fibrous samples display a layering of the fibres perpendicular to the direction of drainage of the precursor liquid foam. This leads to an anisotropy of the compressive behaviour of the samples. Varying the initial liquid fraction of the foam allows for tuning of the compressive strength. We show an increase in over seven times can be achieved for samples of the same density (13 kg.m-3). Graphic abstract

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Section: Introductionmentioning

confidence: 99%

Analysis of the foam-forming of non-woven lightweight fibrous materials using X-ray tomography

et al. 2021

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“…Furthermore, the research in the field of obtaining cellulose fibre materials using foam-forming method is in infancy. In recent studies are presented the foam-formed cellulose fibre materials 3,4 and cellulose non-woven fabric obtained from barkcloth and synthetic epoxy resin as binder 5 with good properties of thermal insulation and sound absorption. However, commercially cellulose fibre products, especially for sound absorption applications, exist only as perforated fibreboard panels, dry-laid recycled newsprint panels and sprayed natural fibre-based materials that contain a binder 6 or waste paper pellets mixed with starch and polypropylene expanded and extruded by water vapours.…”

Section: Introductionmentioning

confidence: 99%

“…The highly porous structure is obtained by entrainment of air at high mixing velocity and its integrity is preserved by using non-destructive conditions of drying. 9,11,12 In this respect, different drying methods were tested such as freeze-drying, 4 supercritical carbon dioxide drying 13 or air drying from volatile organic solvents. 14 Due to high porosity ($99.5%) these new composite materials could be used in many potential applications.…”

Section: Introductionmentioning

confidence: 99%

“…In this way the existing petroleum based foams or EPS/ XEPS materials might be replaced with biodegradable structures high recyclable and from renewable resources. 3,4 Furthermore, based on their biocompatibility and low toxicity compared with many other conventional materials, foam-formed fibre composites can be utilised also in scaffolding, tissue engineering and as biocomposites in pharmaceutical or biomedical applications. 15 In this paper is presented a methodology for producing low-density cellulose composite materials in foam media.…”

Section: Introductionmentioning

confidence: 99%

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Foam-formed cellulose composite materials with potential applications in sound insulation

Nechita

Năstac

2017

Journal of Composite Materials

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Use of foam-formed cellulose composite materials is a viable alternative that provides potential savings in terms of raw materials, energy and water compared with conventional methods for obtaining the fibrous composites. This new innovative manufacturing method leads to obtaining porous materials with low density and low environmental impact, which could replace the petroleum-based products in different industrial application fields like sound control. In this paper is presented a methodology for producing low-density cellulose composite materials in foam media. In this methodology a surfactant is mixed with cellulose fibres (from virgin pulp and recovered papers) at high shear velocity (2000 r/min) to entrain air, dewatered on Buchner funnel under low vacuum and air dried in non-restrained conditions. The obtained composite materials have been tested by sound insulation parameters (sound transmission loss and absorption coefficients) using two experimental impedance tubes with four-microphone configuration and anechoic termination. Three samples of foam-formed cellulose composites and one water-formed composite sample were obtained. Their sound insulation performances were compared with two different commercially available petroleum-based materials currently used in sound insulation applications (i.e. expanded/extruded polystyrene). The experimental results show comparable performances between foam-formed cellulose composites and polystyrene-based samples, but in terms of the environmental impact, these materials can be an appropriate green alternative which can cut the costs of recycling process.

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“…The effect of various parameters such as air content, thickness, porosity, and consistency of the foam-formed composites was reported in many studies [14]. Increasing the thickness and consistency of the product resulted in an increase of acoustic dampening in the foam-formed material.…”

Section: Introductionmentioning

confidence: 99%

Computational Investigations on Soundproof Applications of Foam-Formed Cellulose Materials

2019

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Recent studies have highlighted an innovative way to produce highly porous materials based on cellulose fibers. These studies have focused on the foam-forming process, where the cellulose fibers and other components are mixed with foam. In the authors’ previous research, the foam-formed cellulose materials (FCM) were obtained by mixing a surfactant with cellulose fibers, taken from virgin pulp and recovered papers. In the present paper, the authors performed additional experimental and computational analyses in order to evaluate the sound insulation capabilities of these FCM beyond the initial impedance of tube investigations. The poroacoustics computational methodology parameters—i.e., airflow resistivity, porosity, tortuosity, viscous, and thermal characteristic lengths—were herein evaluated. This analysis was performed using both a theoretical/empirical approach from the specialized literature and an experimental investigation developed by the authors. The computational investigations were conducted in two stages: First, we evaluated the approximation of the experimentally gained normal incidence parameters, in terms of absorption and reflection, respectively, relative to the estimated ones. The second stage of analysis consists of a parametrical estimation of sound insulation characteristics concerning the incidence angle of sound hitting the porous layer. The results presented in this paper are in agreement with the computational experimental results, providing extended soundproof characteristics to the incidence angle of the acoustic field. Further, this study supplies additional information useful for future analyses regarding the influences of random geometry air inclusions into the FCM layer.

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On filtration and heat insulation properties of foam formed cellulose based materials

Cited by 47 publications

References 0 publications

Analysis of the foam-forming of non-woven lightweight fibrous materials using X-ray tomography

Analysis of the foam-forming of non-woven lightweight fibrous materials using X-ray tomography

Foam-formed cellulose composite materials with potential applications in sound insulation

Computational Investigations on Soundproof Applications of Foam-Formed Cellulose Materials

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