Thermogravimetric Analysis as a High-Throughput Lignocellulosic Biomass Characterization Method

Shapiro, Alison J.; O’Dea, Robert M.; Epps, Thomas H.

doi:10.1021/acssuschemeng.3c03769

Cited by 9 publications

(2 citation statements)

References 47 publications

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“…Furthermore, we also investigated the thermal resistance of the modified polymers and unmodified PS by thermogravimetric analysis (TGA) which is a general tool to study the decomposition of materials at different temperatures (Figure S29). [18] TGA was carried out under nitrogen atmosphere with a temperature ramp rate of 10 °C/min. The temperatures corresponding to at 5% mass loss (Td, 5%), 50% mass loss (Td, 50%), the fastest mass loss rate (Td, max), as well as the solid residual char yields at 600 °C can be used to estimate the thermal stability of polymers.…”

Section: Resultsmentioning

confidence: 99%

Post-polymerization Modification of Polystyrene through Mn-Catalyzed Phosphorylation of Aromatic C(sp2)-H Bonds

Liu,

Lin,

Zou

et al. 2024

Preprint

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The high flammability and lack of charrability of polystyrene (PS) pose significant limitations on its broader applications. Therefore, there is an urgent need for a straightforward and efficient method for the synthesis of flame-retardant PS, which still poses a considerable challenge. In this study, we present an efficient approach to enhance the flame-retardant properties of PS through direct phosphorylating aromatic C(sp2)-H bonds using commercially available and inexpensive manganese catalyst. A range of phosphonates served as reactive substrates to enable a tunable degree of polymer functionalization. The corresponding phosphorylated PS specimens were determined by means of 1H NMR, 31P NMR, FTIR spectroscopy and GPC. Microscale combustion calorimetry (MCC) tests indicate that this protocol indeed enhances the flame-retardant performance of PS. Moreover, other advantages associated with the incorporation of the phosphonate group have been observed, including improved thermal resistance and wettability. This cost-effective strategy of Mn-catalyzed C-H can also be utilized to directly obtain phosphonate modification of waste foamed PS and styrene acrylonitrile copolymer, providing a new method for the purpose of recycling and upgrading PS plastics.

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Section: Resultsmentioning

confidence: 99%

Post-polymerization Modification of Polystyrene through Mn-Catalyzed Phosphorylation of Aromatic C(sp2)-H Bonds

Liu,

Lin,

Zou

et al. 2024

Preprint

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“…In particular, acetic acid formation is related to the elimination of O-acetyl groups linked to the main xylan chain, while furfural formation is linked to the dehydroxymethylation of the furan ring side chain in 5-hydroxymethylfurfural, an organic compound formed by the dehydration of reducing sugars [38,39]. The shape of the peaks is determined by the constituent that degrades within the specific thermal window [40]. Indeed, the amorphous structure of hemicellulose results in a broad peak in the 250-300 • C range, whereas the high homogeneity and crystallinity of the cellulose polymer lead to a sharp peak at 300-350 • C. Lignin, due to its structural complexity, degrades over a broad temperature range, and its degradation pattern varies significantly due to its compositional variability [41,42].…”

Section: Region Thermal Window Thermally Activated Processes Mass Los...mentioning

confidence: 99%

Exploring Olive Pit Powder as a Filler for Enhanced Thermal Insulation in Epoxy Mortars to Increase Sustainability in Building Construction

D’Eusanio,

Marchetti,

Pastorelli

et al. 2024

AppliedChem

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This article explores the use of olive pit powder (OPP) as a promising resource for enhancing the thermal insulation properties of epoxy mortars. A comprehensive analysis of the chemical and physical characteristics of OPP was conducted, employing analytical techniques including scanning electron microscopy (SEM), thermogravimetric analysis and emitted gas analysis (TG-MS-EGA), and proximal analysis. Experimental samples of epoxy grout were prepared by using different proportions of a conventional inorganic filler, quartz powder, and OPP within an epoxy mortar matrix. As the percentage of OPP in the formulation increased, the microstructure of the samples gradually became more porous and less compact. Consequently, there was a decrease in density with the increase in OPP content. The 28-day compressive strength decreased from 46 MPa to 12.8 MPa, respectively, in the samples containing only quartz (Sample E) and only OPP (Sample A) as a filler. Similarly, flexural strength decreased from 35.2 to 5.3 MPa. The thermal conductivity decreased from 0.3 W/mK in Sample E to 0.11 in Sample A. Therefore, increasing the %wt of OPP improved insulating properties while reducing the mechanical resistance values. This study highlights the potential of OPP as an environmentally friendly and thermally efficient filler for epoxy mortars, thereby promoting sustainable construction practices.

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Ionic liquid and organosolv pretreatments of horse manure: impact on lignin telomerization by organometallic catalysis and methanization

Pelcoq,

Dumont,

Richard

et al. 2024

Biomass Conv. Bioref.

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Thermogravimetric Analysis as a High-Throughput Lignocellulosic Biomass Characterization Method

Cited by 9 publications

References 47 publications

Post-polymerization Modification of Polystyrene through Mn-Catalyzed Phosphorylation of Aromatic C(sp2)-H Bonds

Post-polymerization Modification of Polystyrene through Mn-Catalyzed Phosphorylation of Aromatic C(sp2)-H Bonds

Exploring Olive Pit Powder as a Filler for Enhanced Thermal Insulation in Epoxy Mortars to Increase Sustainability in Building Construction

Ionic liquid and organosolv pretreatments of horse manure: impact on lignin telomerization by organometallic catalysis and methanization

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