Thermal and combustion features of rigid polyurethane biofoams filled with four forest‐based wastes

Delucis, Rafael de Ávila; Magalhães, Washington Luiz Esteves; Petzhold, César Liberato; Amico, Sandro Campos

doi:10.1002/pc.24784

Cited by 26 publications

(51 citation statements)

References 20 publications

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“…Appropriate surface quality, for the both foams, can be observed in the optical microscopy images (80×) ( Figure 2). A stronger yellow color was also observed in the foams with NC, due to the incorporation of the filler, as already reported in the literature [1]. According the micrographs, for the neat PU foam (Figure 3 (a)), can be observed a smaller and more heterogeneous microcellular structure, composed of smaller and an apparent greater number of open cells with a more elliptical shape, oriented in the direction of expansion.…”

Section: Resultssupporting

confidence: 84%

“…(Americana, Brazil), were used as catalyst and surfactant, respectively. All foams were made with a NCO/OH index of 1.2, according to the literature [1] The ingredients were mechanically stirred at 1000 rpm for 180 s, with exception of the MDI, which was added later to the reaction mixture, followed by extra 120 s of stirring. This mixture was then poured into an open mould (4.3 liters) and, after 24 h, the resultant PU foam was removed from the mould and post-cured in an electric laboratory oven for 2 h at 60 ºC.…”

Section: Biofoam Preparation and Characterizationmentioning

confidence: 99%

“…Polyurethane (PU) foams are engineering materials dominant in several applications, such as industrial and domestic insulation, mattresses, upholstery, structural pieces, among others. Currently, expanded PU represents about a third of the whole PU market due to many advantages, including wide range of densities, low fragility, easy adhesion to coatings, and high versatility for production of complex shapes [1,2].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nanocellulose Filled Biobased Polyurethane Foams

Kerche¹,

Delucis²,

Magalhães³

et al. 2018

Proceedings of the 4th Brazilian Conference on Composite Materials

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In this paper, nanocellulose (NC) dispersed in glycerin was incorporated into polyurethane (PU) biobased foams, using castor oil and glycerin, in a ratio of 3:1, as a biopolyol, produced by freerise pouring method. Firstly, the morphologicals properties, measureds by scanning electronic microscopy (SEM) images, were investigated and, after, the apparent density and compressives properties were measureds. The results indicated efficience in the preparation method for the biofoams and the filled foams presented a decrease in the cellular anisotropy and linear cell density and an increase in cell diameter, with a more homogenous cell structure. These morphologicals properties justify the modifications caused by the fillers in the biofoams, a larger cell, with less orientation, caused a decrease in the values of the apparent density and consequently lower values in compressive mechanical properties.

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Section: Resultssupporting

confidence: 84%

Section: Biofoam Preparation and Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nanocellulose Filled Biobased Polyurethane Foams

Kerche¹,

Delucis²,

Magalhães³

et al. 2018

Proceedings of the 4th Brazilian Conference on Composite Materials

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“…Chemically stable RPUF with high-technological properties were obtained, which indicates that these RPUF may be potential commercial products (e.g., thermal and acoustic insulation materials). 2,3 Filled RPUF are the foams in which fibers or particles were added to enhance properties or decrease the final price. 4 In this context, many reinforcements have already been employed aiming to increase the mechanical properties, sometimes with a synergic effect among the reinforcement and the PU matrix.…”

Section: Introductionmentioning

confidence: 99%

Aramid pulp treated with imidazolium ionic liquids as a filler in rigid polyurethane bio‐foams

Kerche

Silva

Jankee

et al. 2021

J of Applied Polymer Sci

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This article reports an aramid pulp (AP) treated with two ionic liquids (IL), namely 1-n-butyl-3-methylimidazolium chloride (C 4 .Cl) and 1-carboxymethyl-3-methylimidazolium chloride (HO 2 C), and its use as a filler in reinforced rigid polyurethane foams (RPUF). The RPUF were incorporated with the treated AP at three weight fractions (c.a. 0.1, 0.5, and 1.0 wt%) and were produced by the free rising method. The results showed that the studied IL promoted a better interaction between the AP and the RPUF system, which increased the overall reactivity, imparting a higher cell anisotropy. This also yielded a positive effect in mechanical properties and thermal stability of the RPUF. Compared to the neat RPUF, outstanding increases of approximately 50 and 20% were achieved in compressive modulus and strength, respectively. In all, the use of IL promoted increased compatibility between matrix and reinforcement, especially that HO 2 C IL.

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“…In addition, polyurethane foam is difficult to degrade in nature, which has caused huge pollution to the environment. Meanwhile, materials show some deficiencies, such as poor heat resistance in some cases, and it is necessary to compound with other fillers to improve these properties [5]. Foamed plastics reinforced by fiber is a new trend in this field and an important research topic of foamed plastics [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Steam Exploded Peanut Shell Fiber as the Filler in the Rigid Polyurethane Foams

Ju¹,

He²,

Zhan³

et al. 2019

Journal of Renewable Materials

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In this study, steam exploded peanut shell fibers (SE-PSFs) were utilized to fabricate with rigid polyurethane foam (RPUF) in order to improve sound absorption performance and hydrothermal weather resistance. Optimized method of SE treatment, RPUF preparation and flame retardant treatment were selected to prepare SE-PSF/RPUF composites in this experiment. Physical and mechanical properties including density, water absorption capacity, thickness swelling rate, compressive strength, thermal conductivity and average sound absorption coefficient of SE-PSF/RPUF were investigated and compared with the control (PRUF). The results showed that the density, water absorption capacity, thickness swelling rate and thermal conductivity showed an increasing trend with the increase of SE-PSFs content. The strength of the composite material showed a downward trend with the increase of the SE-PSFs content. The average sound absorption coefficient of the SE-PSFs/RPUF compared with PRUF significant increased, and the average sound absorption coefficient of the SE-PSFs/RPUF with SE-PSFs 40% was 0.47. The study getted the best ratio of flame retardants for 10% EG and 3% DMMP. The oxygen index was 35.56 vol%.

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Thermal and combustion features of rigid polyurethane biofoams filled with four forest‐based wastes

Cited by 26 publications

References 20 publications

Nanocellulose Filled Biobased Polyurethane Foams

Nanocellulose Filled Biobased Polyurethane Foams

Aramid pulp treated with imidazolium ionic liquids as a filler in rigid polyurethane bio‐foams

Steam Exploded Peanut Shell Fiber as the Filler in the Rigid Polyurethane Foams

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