Structure-properties relationships of cellular materials from biobased polyurethane foams

Peyrton, Julien; Avérous, Luc

doi:10.1016/j.mser.2021.100608

Cited by 145 publications

(115 citation statements)

References 334 publications

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“…In order to improve the foaming ability of a polymer-BA system, diverse additives can be added in various amounts to the formulation to facilitate nucleation and growth of the cavities. [92] The most widespread are heterogeneous nucleating agents, e.g. clays or carbon particles, and surfactants, e.g.…”

Section: B Chronology Of a Foaming Process -The Foaming Windowmentioning

confidence: 99%

“…This is certainly the most mature and versatile technology for the preparation of self-foaming polymers. [92] Authors have reported comprehensive characterization of flexible and rigid foams obtained using conventional isocyanate precursors. Seo et al have studied the effect of the initial water content on the mechanical, morphological, and thermal properties of rigid polyurethane foams prepared from polyisocyanates based on 4,4'-diphenylmethane diisocyanate (MDI) and polyether polyol.…”

Section: A Thermal Degradation Of In-situ Generated Carbamic Acid Derivatives Formation Of Carbamic Acid By Reaction Of Isocyanates With mentioning

confidence: 99%

“…[110,111] We recommend a recently published exhaustive and excellent review on the topic for more details. [92] In this context, there are new opportunities for the development of environmentally friendly and highly performant PUF in replacement of the foamy parts of PPE that are still based on physical blowing methods and petro-based precursors. In the case of PPE applications, PUFs are leaders with many products on the market, [1,112,113] e.g.…”

Section: A Thermal Degradation Of In-situ Generated Carbamic Acid Derivatives Formation Of Carbamic Acid By Reaction Of Isocyanates With mentioning

confidence: 99%

See 2 more Smart Citations

Self-foaming polymers: Opportunities for the next generation of personal protective equipment

Monie

Vidil

Grignard

et al. 2021

Materials Science and Engineering: R: Reports

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Section: B Chronology Of a Foaming Process -The Foaming Windowmentioning

confidence: 99%

Section: A Thermal Degradation Of In-situ Generated Carbamic Acid Derivatives Formation Of Carbamic Acid By Reaction Of Isocyanates With mentioning

confidence: 99%

Section: A Thermal Degradation Of In-situ Generated Carbamic Acid Derivatives Formation Of Carbamic Acid By Reaction Of Isocyanates With mentioning

confidence: 99%

See 1 more Smart Citation

Self-foaming polymers: Opportunities for the next generation of personal protective equipment

Monie

Vidil

Grignard

et al. 2021

Materials Science and Engineering: R: Reports

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“…[1] [2] Polymer foams also provide excellent thermal and acoustical insulation, along with excellent energy dissipation and impact absorption. [3] For instance, in automobiles, the control panel but moreover, generally, side panels contain a significant amount of polymeric foam to protect individuals in case of accidents. [4] Packaging is also a significant sector, where substances with sufficient impact dampening ability are necessary to prevent product damage during travel.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Loaded Foams During Free Fall Investigation and Evaluation of Microstructure

Boumdouha¹,

Safidine²,

Boudiaf³

2021

Preprint

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We aim to maintain as much control as possible over the development of the microstructure during the manufacture of polyurethane foam with a certain density. As a result, the finished product may not contain the required characteristics for the shock absorber used. That is why polyurethane foam loaded with zinc oxide and silica must be able to sustain the cellular structure and strengthen it. Mechanical characterization was carried out utilizing a dynamic drop impact test conducted on locally developed and constructed equipment. Polyurethane foams' mechanical properties are highly reliant on their density, cell structure (size and shape), and the fraction of open or closed cells. Within the cell structure, the foam may be directed preferentially. Following that, Raman spectroscopy and SEM investigation were used to visualize the semi-opened cells of the cellular polymer. The cellular polymer appears to possess permanent, regular cellular structures with a high degree of reversibility in terms of overlap.

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“…Polyurethanes (PUs) are the sixth most used polymers group all over the world with a production of 22.3 million tons per year [ 1 , 2 , 3 , 4 ]. The PUs compounds are generally thermoset polymers whose synthesis consists in the reaction of nucleophilic addition between a multifunctional alcohol (polyol) and a di- or tri-isocyanate, resulting in a reticular urethane structure [ 4 , 5 , 6 ], as shown in reaction (1).

…”

Section: Introductionmentioning

confidence: 99%

Glycolysis of Polyurethanes Composites Containing Nanosilica

et al. 2021

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Rigid polyurethane (RPU) foams have been successfully glycolyzed by using diethylene glycol (DEG) and crude glycerol (CG) as transesterification agents. However, DEG did not allow to achieve a split-phase process, obtaining a product with low polyol purity (61.7 wt %). On contrary, CG allowed to achieve a split-phase glycolysis improving the recovered polyol purity (76.5%). This is an important novelty since, up to now, RPUs were glycolyzed in single-phase processes giving products of low polyol concentration, which reduced the further applications. Moreover, the nanosilica used as filler of the glycolyzed foams was recovered completely pure. The recovered polyol successfully replaced up to 60% of the raw polyol in the synthesis of RPU foams and including the recovered nanosilica in the same concentration than in glycolyzed foam. Thus, the feasibility of the chemical recycling of this type of polyurethane composites has been demonstrated. Additionally, PU foams were synthesized employing fresh nanosilica to evaluate whether the recovered nanosilica has any influence on the RPU foam properties. These foams were characterized structurally, mechanically and thermally with the aim of proving that they met the specifications of commercial foams. Finally, the feasibility of recovering the of CG by vacuum distillation has been demonstrated.

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Structure-properties relationships of cellular materials from biobased polyurethane foams

Cited by 145 publications

References 334 publications

Self-foaming polymers: Opportunities for the next generation of personal protective equipment

Self-foaming polymers: Opportunities for the next generation of personal protective equipment

Experimental Study of Loaded Foams During Free Fall Investigation and Evaluation of Microstructure

Glycolysis of Polyurethanes Composites Containing Nanosilica

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