Thermal behavior of lignin and cellulose from waste composting process

Bernabé, Giseli Aparecida; Kobelnik, Marcelo; Almeida, Sônia de; Ribeiro, Clóvis Augusto; Crespi, Marisa Spirandeli

doi:10.1007/s10973-012-2276-8

Cited by 29 publications

(15 citation statements)

References 28 publications

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“…As is shown in Fig. 8, the TG and DSC curves of wood recorded in this study are similar to curves obtained by other authors (e.g., [23,24]). The thermal degradation of wood expressed as a TG curves can be divided into three stages (Fig.…”

Section: Comparison Of Pyrolysis and Combustion Processessupporting

confidence: 90%

Application of a device used for observation of controlled thermal processes in a furnace

Hebda

Laska

Szechyńska‐Hebda

2013

J Therm Anal Calorim

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This paper describes an appliance that allows to visually observe phenomena occurring in the studied materials during heating, from room temperature to 600°C. The design criteria and device construction are described in details. The device allows for visual observation of physical phenomena of various material types, e.g., organic matter, polymers, and even observation of sintering mechanisms. Analysis of lubricant evaporation from powder metals (an aluminum alloy) in different atmospheres is shown. The featured device can also be used for interpretation of material defects. This is presented on the example of heating the aluminum alloy in an atmosphere containing oxygen (to simulate a furnace leakage). In addition, the influence of experimental atmosphere on melting and sintering processes is demonstrated. Another application of the presented device can be the visual observation of differences between combustion and pyrolysis processes. Our results show that the presented device is complementary with an advanced thermoanalysis apparatus which, in turn, does not allow visual observation of samples.

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Section: Comparison Of Pyrolysis and Combustion Processessupporting

confidence: 90%

Application of a device used for observation of controlled thermal processes in a furnace

Hebda

Laska

Szechyńska‐Hebda

2013

J Therm Anal Calorim

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“…Chemical modifications of the fibers were suggested by the ester carbonyl vibrations associated with the esterification of hydroxyl groups of fibers at 1,260, 1,630 cm −1 (shoulder) and 1,715 cm −1 because of AA treatments . The peak centered at ≈2,900 cm −1 , which was of higher intensity for the EP‐treated BPFs, is attributed to new γ(CH) and γ(CH 2 ) groups formed on the fiber surface by this treatment (see Fig.…”

Section: Resultsmentioning

confidence: 93%

Water uptake, chemical characterization, and tensile behavior of modified banana–plantain fiber and their polyester composites

Rodríguez

Orrego

2015

Polymer Composites

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Banana–plantain fibers (BPFs) were treated with acetic anhydride (AA), epichlorohydrin (EP), and an acetic anhydride–epichlorohydrin blend (AA_EP). Natural fiber–polyester composites (PCs) were fabricated using untreated and treated BPF by the hand lay‐up technique. Modified BPF Raman and Infrared spectroscopy (ATR‐FTIR) analysis revealed losses of lignin and hemicelluloses and new chemical bonds that confirmed the replacement of part of the raw fiber hydroxyl groups, which gave rise to a degree of hydrophobicity in the treated fibers. This change altered their water sorption isotherms, swelling behavior in water, impedance spectroscopy, and XRD analysis. Assays of water absorption and tensile resistance for untreated BPF (U) and modified BPF polyester composites demonstrated a remarkable reduction in water intake, whereas tensile strength was maintained (P < 0.05) for the modified BPF polyester composites. POLYM. COMPOS., 37:2960–2973, 2016. © 2015 Society of Plastics Engineers

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“…The initial degradation temperature corresponding in this case to 10% weight loss (T 10% ) of acetylated lignin (AKL) is marker higher than original Kraft lignin (KL) with values of 310 • C and 215 • C, respectively. The main degradation step occurs in the temperature range between 300 and 500 • C, and it is associated with the fragmentation of inter-units linkage (Bernabe et al, 2013;Bertini et al, 2012). The maximum weight loss rate in acetylated Kraft lignin could be observed at 372 • C, while Kraft lignin showed a temperature of 369 • C. The amount of char residue at 600 • C was found to be 40.5% and 39.5% for AKL and KL, respectively.…”

Section: Thermal Propertiesmentioning

confidence: 97%