Impact of recycled polypropylene on the specific properties of stretched polypropylene tapes for woven bag
Hamza Daoudi,
Fatima-Zahra Semlali,
Zineb Kassab
et al.
Abstract:To create woven bag packaging for Nitrogen-Phosphorus-Potassium (NPK) fertilizer granules, this work conducted an experimental study on the utilization of recycled polypropylene (RPP) in stretched polypropylene (PP) tapes. By altering the amount of RPP using an industrial-scale stretching tapes extrusion technique, the as-obtained RPP granules were utilized to develop three stretched tape composite series filled with 0.9, 2.8, and 3.6 wt% of RPP, respectively. The series of produced composites were described i… Show more
“…Notably, the peak at 3400 cm –1 decreased for the PT, indicating a reduction in the availability of O–H groups. ,− The band around 1000 cm –1 corresponds to the P–O–P stretching groups, while the P–O–C aliphatic bond, P–OH and PO stretching modes are associated with peaks at around 834, 900–940, and 1230 cm –1 , respectively . Given the distinctive features of the functionalization process and the presence of these adsorption bands, there is a clear indication that the phosphorylation of tannin took place, resulting in the insertion of the phosphate-containing groups into the tannin structure. , …”
Tannin, after lignin, is one of the most abundant sources of natural aromatic biomolecules. It has been used and chemically modified during the past few decades to create novel biobased materials. This work intended to functionalize for the first time quebracho Tannin (T) through a simple phosphorylation process in a urea system. The phosphorylation of tannin was studied by Fourier transform infrared spectroscopy (FTIR), NMR, inductively coupled plasma optical emission spectroscopy (ICP-OES), and X-ray fluorescence spectrometry (XRF), while further characterization was performed by scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDX) and thermogravimetric analysis (TGA) to investigate the morphology, composition, structure, and thermal degradation of the phosphorylated material. Results indicated the occurrence of phosphorylation, suggesting the insertion of phosphate-containing groups into the tannin structure, revealing a high content of phosphate for modified tannin (PT). This elevated phosphorus content serves as evidence for the successful incorporation of phosphate groups through the functionalization process. The corresponding PT and T were employed as adsorbents for methylene blue (MB) removal from aqueous solutions. The results revealed that the Langmuir isotherm model effectively represents the adsorption isotherms. Additionally, the pseudo-second-order model indicates that chemisorption predominantly controls the adsorption mechanism. This finding also supports the fact that the introduced phosphate groups via the phosphorylation process significantly contributed to the improved adsorption capacity. Under neutral pH conditions and at room temperature, the material achieved an impressive adsorption capacity of 339.26 mg•g −1 in about 2 h.
“…Notably, the peak at 3400 cm –1 decreased for the PT, indicating a reduction in the availability of O–H groups. ,− The band around 1000 cm –1 corresponds to the P–O–P stretching groups, while the P–O–C aliphatic bond, P–OH and PO stretching modes are associated with peaks at around 834, 900–940, and 1230 cm –1 , respectively . Given the distinctive features of the functionalization process and the presence of these adsorption bands, there is a clear indication that the phosphorylation of tannin took place, resulting in the insertion of the phosphate-containing groups into the tannin structure. , …”
Tannin, after lignin, is one of the most abundant sources of natural aromatic biomolecules. It has been used and chemically modified during the past few decades to create novel biobased materials. This work intended to functionalize for the first time quebracho Tannin (T) through a simple phosphorylation process in a urea system. The phosphorylation of tannin was studied by Fourier transform infrared spectroscopy (FTIR), NMR, inductively coupled plasma optical emission spectroscopy (ICP-OES), and X-ray fluorescence spectrometry (XRF), while further characterization was performed by scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDX) and thermogravimetric analysis (TGA) to investigate the morphology, composition, structure, and thermal degradation of the phosphorylated material. Results indicated the occurrence of phosphorylation, suggesting the insertion of phosphate-containing groups into the tannin structure, revealing a high content of phosphate for modified tannin (PT). This elevated phosphorus content serves as evidence for the successful incorporation of phosphate groups through the functionalization process. The corresponding PT and T were employed as adsorbents for methylene blue (MB) removal from aqueous solutions. The results revealed that the Langmuir isotherm model effectively represents the adsorption isotherms. Additionally, the pseudo-second-order model indicates that chemisorption predominantly controls the adsorption mechanism. This finding also supports the fact that the introduced phosphate groups via the phosphorylation process significantly contributed to the improved adsorption capacity. Under neutral pH conditions and at room temperature, the material achieved an impressive adsorption capacity of 339.26 mg•g −1 in about 2 h.
“…The widespread utilization of polymeric materials in different sectors of our daily life has prompted extensive scientific endeavors aimed at addressing the inherent susceptibility of these materials to rapid degradation and ignition under heat. − In this regard, considerable attention has been dedicated to developing sustainable materials suitable for a broad spectrum of uses because of the pressing necessity for social and economic progress. , The surging enthusiasm for biobased polymers can be attributed to their impressive properties and performance, closely matching those typically associated with petroleum-based polymers …”
In recent decades, the production of nanocellulose has gained significant attention. Nanocellulose-based film materials have found widespread applications in various high-end sectors owing to their remarkable characteristics. Nevertheless, the limitation of certain functional properties, such as resistance to water and fire, has posed challenges to their broader utilization. In this study, we conducted a comparative investigation on the impact of two distinct chemical modifications, namely, TEMPO-mediated oxidation and phosphorylation, on the production of nanocellulose sheets via a papermakingassisted process. This approach explores the synergistic effects of these modifications in enhancing the properties of cellulose nanofibers for nanopaper production. To achieve this, we proposed utilizing Henna stems as an alternative source of cellulosic material, aiming to harness untapped agricultural residues as a sustainable alternative to conventional sources such as wood and cotton. The phosphorylated Henna nanopaper exhibited substantial enhancements in terms of mechanical properties, wettability, fire resistance, and water vapor permeability when compared to the TEMPO-modified Henna nanopaper. In conclusion, our findings underscore the potential of Henna stems as an environmentally sustainable source of cellulose for nanofiber production, positioning it as a promising alternative to wood and other lignocellulosic sources for advanced applications.
The recycling of plastics and the incorporation of bio-fillers in the plastic industry are processes currently gaining momentum due to their significance in sustainable development and carbon footprint reduction. In this investigation, a biocomposite was fabricated using recycled polypropylene (RPP) reinforced with oyster shell (OS) particles. The introduction of OS bio-fillers is aimed to mitigate plastic shrinkage during the injection molding process, with two different proportions employed: 10wt.% and 30wt.%. The biocomposite was characterized thermally and mechanically. Thermal analysis by TGA showed that the bio-fillers increased the degradation temperature of the recycled polypropylene biocomposite. Mechanical assessments demonstrated an enhancement in polypropylene stiffness by 10.4% and microhardness by 21.1%, albeit at the cost of reduced ductility. Conversely, the tensile strength and impact resistance decreased slightly with the incorporation of OS particles in RPP. Dynamic mechanical analysis indicated an improvement in the storage modulus up to 1.45 GPa of the biocomposite with the reinforcement of OS particles. These findings underscore the potential for integrating recycled polypropylene with natural reinforcements, aligning with the global pursuit of environmentally sustainable materials in diverse industrial applications.
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