New insights on the thermal degradation pathways of neat poly(furfuryl alcohol) and poly(furfuryl alcohol)/SiO2 hybrid materials

Guigo, Nathanaël; Mija, Alice; Zavaglia, Raffaele; Vincent, Luc; Sbirrazzuoli, Nicolas

doi:10.1016/j.polymdegradstab.2009.03.008

Cited by 78 publications

(82 citation statements)

References 17 publications

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“…It can be therefore concluded that PFA supported on MCM-41 exhibits lower thermal stability regardless of the polymer content in the composite. This effect, probably caused by the relatively easy furan ring-opening occurring during the decomposition of polymer deposited on the silica surface, is opposite to that reported by Guigo et al [36]. However, the thermal stability of the hybrid PFA/silica materials discussed in [36] cannot be simply compared to that of the composites presented herein.…”

Section: Thermal Stability Of Pfa Deposited On Mcm-41 Supportcontrasting

confidence: 71%

“…However, the thermal stability of the hybrid PFA/silica materials discussed in [36] cannot be simply compared to that of the composites presented herein. The samples studied by Guigo et al [36] were prepared by simultaneous inorganic mesophase formation and furfuryl alcohol polycondensation. Finally, they obtained materials composed of nanometric clusters branched together through condensation reaction to form the 3D organic-inorganic network.…”

Section: Thermal Stability Of Pfa Deposited On Mcm-41 Supportmentioning

confidence: 96%

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Investigation on the Low-Temperature Transformations of Poly(furfuryl alcohol) Deposited on MCM-41

et al. 2013

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MCM-41-type mesoporous silica was used as a support for poly(furfuryl alcohol) deposition. This material was produced by precipitation-polycondensation of furfuryl alcohol (FA) in aqueous slurry of the SiO 2 support followed by controlled partial carbonization. By tuning the FA/MCM-41 mass ratio in the reaction mixture, various amounts of polymer particles were introduced on the inner and outer surface of the MCM support. The thermal decomposition of the PFA/MCM-41 composites was studied by thermogravimetry (TG) and spectroscopic techniques (DRIFT, XPS), whereas the evolution of textural parameters with increasing polymer content was investigated using low-temperature adsorption of nitrogen. The mechanism of thermal transformations of PFA deposited on the MCM-41 surface was discussed in detail. It was found that heating at a temperature of about 523 K resulted in opening of the furan rings and the formation of γ-diketone moieties, which were found to be * Corresponding author. Tel. +48-12-6632006; fax +48-12-6340515. E-mail address: kustrows@chemia.uj.edu.pl 2 the highest effective surface species for the adsorption of polar volatile organic compounds. A further increase in calcination temperature caused a drop in the amounts of surface carbonyls and the appearance of condensed aromatic domains.

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Section: Thermal Stability Of Pfa Deposited On Mcm-41 Supportcontrasting

confidence: 71%

Section: Thermal Stability Of Pfa Deposited On Mcm-41 Supportmentioning

confidence: 96%

Investigation on the Low-Temperature Transformations of Poly(furfuryl alcohol) Deposited on MCM-41

et al. 2013

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“…The weight loss curve of the control is divisible into three different stages: moisture evaporation (from room temperature to 100 °C), hemicellulose and cellulose degradation (from 220 °C to 370 °C), and lignin degradation (above 400 °C). Interestingly, an additional degradation region appeared in the furfurylated wood samples (from 100 °C to 220 °C), which was attributed to the thermal degradation of PFA (Guigo et al 2009). The moisture content of the treated wood was also considerably lower than that of the control, indicating that the hydrophobic characteristics of the wood were enhanced by the modification, i.e., that the treated wood had a lower water content .…”

Section: Thermal Stabilitymentioning

confidence: 98%

Improving Dimensional and Thermal Stability of Poplar Wood via Aluminum-based Sol-Gel and Furfurylation Combination Treatment

et al. 2017

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Wood modification is an efficient method to improve wood performance and expand the applications of wood material. In this study, a combination modification method of aluminum sol-gel and furfurylation was developed to improve the performance of poplar wood. Wood samples were characterized by Fourier transform infrared spectroscopy and field emission scanning electron microscopy. The properties of the treated wood, including thermal stability, water uptake, dimensional stability, and dynamic wettability were also evaluated. The thermogravimetric analysis results indicated that the incorporation of an aluminum-based gel could prevent furfurylated wood from thermal degradation by converting the gel into nano-Al2O3. The aluminum-based sol-gel apparently hindered furfuryl alcohol polymerization and reduced the weight percent gain of the samples; the anti-swelling efficiency of the treated wood was over 57% (with little decrease) due to crosslinking between the wood and aluminum-based gel. The water uptake and hydrophobicity of the modified samples were improved significantly in comparison to the control samples.

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“…The former attributes to desorption of the solvent molecules from the resin present in the lattice, while the latter corresponds to dehydration [24] . Between the temperature range from 150 ºC to 300 ºC, the mass loss is about 35% of the total mass, and the second thermal decomposition stage is probably related to the chain scission of weak chemical bonds [25] . The third decomposition steps appear at the temperature range from 450 ºC to 650 ºC, and it can be inferred that methylene scission is mainly responsible for the decomposition of furan resin [26,27] .…”

Section: Characteristics Of New Sand and Reclaimed Sandmentioning

confidence: 99%

Effect of reclaimed sand additions on mechanical properties and fracture behavior of furan no-bake resin sand

Liu

et al. 2017

China Foundry

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National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; 2. Shanghai Light Alloy Net Forming National Engineering Research Center Co., Ltd., Shanghai 201615, China F uran no-bake resin sands possess a good combination of high dimension accuracy, good surface finish, and room temperature curing, which make them attractive for industrial applications of producing moulds for different kinds of castings, such as steel, iron and non-ferrous alloy castings [1][2][3] . However, it is commonly considered that after pouring, the furan no-bake resin sand may exhibit some shortcomings, such as poor collapsibility, various types of gases released, residual resin, and waste sand, which would cause environmental pollution, increased casting production cost and waste of natural resources [4,5] . Furthermore, the foundry industry is under great pressure due to national policy restrictions on resource conservation and environmental protection [6][7][8][9] . Therefore, the low cost, effective, and eco-friendly furan Abstract: In this work, the effects of reclaimed sand additions on the microstructure characteristics, mechanical properties and fracture behavior of furan no-bake resin sand have been investigated systematically within the temperature range from 25 to 600 ºC. The addition of 20%-100% reclaimed sand showed dramatic strength deterioration effect at the same temperature, which is associated with the formation of bonding bridges. Both the ultimate tensile strength (UTS) and compressive strength (CS) of the moulding sand initially increase with the increase of temperature, and then sharply decrease with the further increase of temperature, which is attributed to the thermal decomposition of furan resin. The addition amount of reclaimed sand has a remarkable effect on the room temperature fracture mode, i.e., with the addition of 0-20% reclaimed sand, the fracture mode was mainly cohesive fracture; the fracture mode converts to be mixture fracture mode as the addition of reclaimed sand increases to 35%-70%; further increasing the addition to 100% results in the fracture mode of typical adhesive fracture. The fracture surface of the bonding bridge changes from a semblance of cotton or holes to smooth with the increase of test temperature. The application of reclaimed sand has a clear economical advantage for mass production of components due to their short reprocessing cycle and low assembly costs. Previous research found the possibility of reclaimed sand in casting, i.e., green moulding sand [10][11][12][13][14][15] , furan resin sand [16][17][18][19] , and sodium silicate sand [20][21][22] . It was found that the mixture of reclaimed sand and new sand satisfies the standards for moulding sands, and sustainable sand casting was developed. In the process of casting, heat will be generated through liquid metals so that the temperature of the moulding sand may be ...

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New insights on the thermal degradation pathways of neat poly(furfuryl alcohol) and poly(furfuryl alcohol)/SiO2 hybrid materials

Cited by 78 publications

References 17 publications

Investigation on the Low-Temperature Transformations of Poly(furfuryl alcohol) Deposited on MCM-41

Investigation on the Low-Temperature Transformations of Poly(furfuryl alcohol) Deposited on MCM-41

Improving Dimensional and Thermal Stability of Poplar Wood via Aluminum-based Sol-Gel and Furfurylation Combination Treatment

Effect of reclaimed sand additions on mechanical properties and fracture behavior of furan no-bake resin sand

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