An efficient synthesis of bio-based Poly(urethane-acrylate) by SiO2-Supported CeCl3·7H2O–NaI as recyclable Catalyst

Pastore, Genny; Gabrielli, Serena; Giacomantonio, Roberto; Lupidi, Gabriele; Capodaglio, Sabrina; Stella, Francesca; Leone, Ezio; Compagnucci, Tommaso; Marcantoni, Enrico

doi:10.1016/j.rinma.2022.100294

Cited by 6 publications

(6 citation statements)

References 44 publications

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“… a all % are expressed as enriched fractions. b These values were reported in our previous studies [ 15 ]. …”

Section: Figurementioning

confidence: 55%

“…The absorption peak at around 1620 cm −1 is characteristic of aromatic skeletal vibration associated to the out of plane stretching of aromatic groups, the absorption peaks in the region from 950 to 1200 cm −1 are assigned to the –C–O stretching vibration in holocellulose, and the peak at 1420 cm −1 is assigned to the –CH, –CH 2 bending of aliphatic carbons. The quite strong peak at 1320 cm −1 is assigned to stretching and deformation vibrations of the –C–H group in the glucose unit of cellulose structure [ 15 ].…”

Section: Methodsmentioning

confidence: 99%

“…Lignin extraction was carried out directly from biomass flours through the dissolving method with a mixture of 2:1 of acetic acid and choline chloride( Figure A1 ) (deep eutectic solvent, DES) [ 15 ].…”

Section: Figure A1mentioning

confidence: 99%

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Chemical, Thermal and Mechanical Characterization of Licorice Root, Willow, Holm Oak, and Palm Leaf Waste Incorporated into Maleated Polypropylene (MAPP)

Gabrielli

Caviglia²,

Pastore³

et al. 2022

Polymers

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The effect of four lignocellulosic waste fillers on the thermal and mechanical properties of biocomposites was investigated. Powdered licorice root, palm leaf, holm oak and willow fillers were melt compounded with polypropylene at two different weight contents, i.e., 10 and 30, and then injection molded. A commercially available maleated coupling agent was used to improve the filler/matrix interfacial adhesion at 5 wt.%. Composites were subjected to chemical (FTIR-ATR), thermal (TGA, DSC, DMA) and mechanical (tensile, bending and Charpy impact) analyses coupled with a morphological investigation by scanning electron microscopy. Although similarities among the different formulations were noted, holm oak fillers provided the best combination of thermal and mechanical performance. In particular, at 30 wt.% content with coupling agent, this composite formulation displayed remarkable increases in tensile strength and modulus, flexural strength and modulus, of 28% and 110%, 58% and 111%, compared to neat PP, respectively. The results imply that all these lignocellulosic waste fillers can be used successfully as raw materials for biocomposites, with properties comparable to those featured by other natural fillers.

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“… a all % are expressed as enriched fractions. b These values were reported in our previous studies [ 15 ]. …”

Section: Figurementioning

confidence: 55%

Section: Methodsmentioning

confidence: 99%

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Chemical, Thermal and Mechanical Characterization of Licorice Root, Willow, Holm Oak, and Palm Leaf Waste Incorporated into Maleated Polypropylene (MAPP)

Gabrielli

Caviglia²,

Pastore³

et al. 2022

Polymers

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“…Stretching C–O–C symmetric and asymmetric vibrations were observed in the ranges of 1050–1200 cm −1 and 1250–1300 cm −1 [ 54 ], and skeletal stretching at 1637 cm −1 from the CN Amide II was present. The peak at 1529 cm −1 shows in-plane NH deformation vibrations [ 55 ]. After printing, an alcohol rinsing procedure was mandatory.…”

Section: Resultsmentioning

confidence: 99%

Effect of Aging on Tensile and Chemical Properties of Polylactic Acid and Polylactic Acid-Like Polymer Materials for Additive Manufacturing

Golubović,

Bojović,

Kirin

et al. 2024

Polymers

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Additive manufacturing, with its fast development and application of polymeric materials, led to the wide utilization of polylactic acid (PLA) materials. As a biodegradable and biocompatible aliphatic polyester, produced from renewable sources, PLA is widely used in different sectors, from industry to medicine and science. The aim of this research is to determine the differences between two forms of the PLA material, i.e., fused deposition modeling (FDM) printed filament and digital light processing (DLP) printed resin, followed by aging due to environmental and hygiene maintenance conditions for a period of two months. Specimens underwent 3D scanning, tensile testing, and Fourier transform infrared (FTIR) spectrometry to obtain insights into the material changes that occurred. Two-way Analysis of Variance (ANOVA) statistical analysis was subsequently carried out to determine the statistical significance of the determined changes. Significant impairment can be observed in the dimensional accuracies between both materials, whether they are non-aged or aged. The mechanical properties fluctuated for aged FDM specimens: 15% for ultimate tensile stress, 15% for elongation at yield, and 12% for elastic modulus. Regarding the DLP aged specimens, the UTS decreased by 61%, elongation at yield by around 61%, and elastic modulus by 62%. According to the FTIR spectral analysis, the PLA materials degraded, especially in the case of resin specimens. Aging also showed a significant influence on the elastic modulus, ultimate tensile stress, elongation at yield, elongation at break, and toughness of both materials, which was statistically shown by means of a two-way ANOVA test. The data collected in this research give a better understanding of the underlying aging mechanism of PLA materials.

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“…Following our previous study ( Pastore et al, 2022 ), in a 25 ml two-necked round bottom flask, 1eq. of polyol (0.8 eq.…”

Section: Methodsmentioning

confidence: 99%

Novel terephthalamide diol monomers synthesis from PET waste to Poly(Urethane acrylates)

et al. 2023

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Due to its excellent properties, poly(ethylene terephthalate) (PET) is one of the most produced and consumed polymers. Among plastics, it represents the main contributor to environmental pollution. Following the circular economy model, the chemical upcycling of PET reduces the amount of waste generated and transforms it into high-value products. The depolymerization of poly(ethylene terephthalate) into oligomers or monomers leads to forming a library of reactive molecules involved in different polymerization processes to obtain compounds with improved properties. Herein, several β-hydroxy amines were synthesized and used for the chemical recycling of water bottle waste by an environmental benefit aminolysis process to get very useful new terephthalamide diol monomers. The recycled diol monomers were subsequently exploited to synthesize poly(urethane acrylates) (PUAs) UV-curable coatings, and their chemical, thermal and mechanical characterizations were performed. The results show the great potential of the developed synthesis protocols to obtain PUAs with final properties that can be modulated to meet the requirements of different applications.

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An efficient synthesis of bio-based Poly(urethane-acrylate) by SiO2-Supported CeCl3·7H2O–NaI as recyclable Catalyst

Cited by 6 publications

References 44 publications

Chemical, Thermal and Mechanical Characterization of Licorice Root, Willow, Holm Oak, and Palm Leaf Waste Incorporated into Maleated Polypropylene (MAPP)

Chemical, Thermal and Mechanical Characterization of Licorice Root, Willow, Holm Oak, and Palm Leaf Waste Incorporated into Maleated Polypropylene (MAPP)

Effect of Aging on Tensile and Chemical Properties of Polylactic Acid and Polylactic Acid-Like Polymer Materials for Additive Manufacturing

Novel terephthalamide diol monomers synthesis from PET waste to Poly(Urethane acrylates)

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