Novel bifunctional dispersing agents from waste PET packaging materials and interaction with cement

Meawad, Amr; Ibrahim, Saber

doi:10.1016/j.wasman.2019.01.028

Cited by 27 publications

(16 citation statements)

References 51 publications

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“…The particle size results have a great agreement with confirmation to each other's through increasing the surface area with decreasing of particle size from S3, S2 to S1. Overall, the physical characterization measurements are verified the stability, size and surface area for sludge samples as mentioned theoretically and previous research (Ibrahim et al 2016;Meawad and Ibrahim 2019;Abdelraof et al 2020).…”

Section: Physical Characterizationsupporting

confidence: 82%

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New organic compounds detection and potential removal in crude phosphoric acid using waste sludge

Ibrahim

Masoud

Taha

et al. 2021

International Journal of Environmental Analytical Chemistry

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Some organic compounds in phosphoric acid are a potential mediator of adverse environmental impacts on soil. This work aims to detect and reduce the content of organic compounds in crude phosphoric acid using waste sludge, from water treatment plants, as a low-cost sorbent. Gas chromatography/Mass spectrometry (GC/MS) was used to detect the organic species in crude phosphoric acid, while X-ray fluorescence (XRF), X-ray Diffraction (XRD), and Attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy were used to characterize waste sludges. Practically, three sludge samples were utilized and different factors including shaking time, sorbent dose, and phosphoric acid concentration were studied.The results of GC/MS revealed that crude phosphoric acid contains bis [tert-butyl(dimethyl)silyl] azelaate, dibutyl phthalate, and 2,6-di-tert-butyl-4-methylphenol as the main organic species. Moreover, the clay content and the surface charge of sludge strongly affect the removal efficiency of organic species. Kinetic analysis using Lagregran pseudo-first-order, pseudo-second-order, Morris-Weber, and Elvoich models display that the sorption process using waste sludges is a chemisorption process. Finally, the three sludge samples exhibit potential sorbents for the clarification of phosphoric acid and sequentially to produce green phosphate fertilizers.

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Section: Physical Characterizationsupporting

confidence: 82%

“…Big clusters of sludge with accumulated inorganic and organic substance resulted from Nile River were presence in range 0.7 to 1.7 µm. neither big particles of sludge nor excellent polydispersity indices were pointed to homogenized particle size (Ahmed et al 2019;Meawad and Ibrahim 2019).…”

Section: Physical Characterizationmentioning

confidence: 95%

New organic compounds detection and potential removal in crude phosphoric acid using waste sludge

Ibrahim

Masoud

Taha

et al. 2021

International Journal of Environmental Analytical Chemistry

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“…66 Meawad and Ibrahim conducted a study to develop a novel bifunctional cement dispersing agent via aminolysis depolymerization of PET waste with 4-amino-1-butanol in the presence of sodium acetate as a catalyst, which contributed to fluidity modification of fresh cement. 67 In this regard, PET waste was subjected to aminolysis using excess EA in the presence of different inexpensive nontoxic catalysts, including sodium acetate, sodium bicarbonate, and sodium sulphate.…”

Section: Aminolysismentioning

confidence: 99%

“…Meawad and Ibrahim conducted a study to develop a novel bifunctional cement dispersing agent via aminolysis depolymerization of PET waste with 4‐amino‐1‐butanol in the presence of sodium acetate as a catalyst, which contributed to fluidity modification of fresh cement 67 …”

Section: Chemical Recycling Of Petmentioning

confidence: 99%

Chemical recycling of PET: A stepping‐stone toward sustainability

Shojaei

Abtahi

Najafi

2020

Polymers for Advanced Techs

122

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This paper focuses explicitly on the chemical approaches involved in the recycling of polyethylene terephthalate (PET). Due to the high rate of consumption as well as nonbiodegradability, PET plays a crucial role as one of the most significant sources of accumulated waste in the landfill which jeopardizes our planet. To address this issue as well as increased environmentally conscious, running out of landfill space, natural resource, and energy conservation, and producing value-added chemicals to use as building block or co-products, the chemical recycling methods have been evolved. Therefore, there has been an attempt to have a comprehensive review of the five types of conventional recycling methods namely hydrolysis, methanolysis, glycolysis, aminolysis, and ammonolysis studied by researchers over the last two decades. In this regard, the influence of diverse depolymerization reaction variables for instance, traditional catalyst, temperature profile, ionic liquid catalysts, phase transfer catalyst, microwave assistance, etc was reported. Moreover, the upsides and downsides of each technique were considered.

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“…The typical images showed that the surface coverage was homogeneous and smooth with a less than 0.5 nm roughness (RMS) value for the PEI polymer surface. 27…”

Section: Atomic Force Microscopementioning

confidence: 99%

Radiation crosslinking of linear polyethyleneimine‐based nanoparticles grafted to poly(glycidyl methacrylate) via trimethylolpropane triacrylate as potential electronic packaging material

Ibrahim

Lotfy

2021

J of Applied Polymer Sci

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Linear polyethyleneimine (L-PEI)-based nanoparticles were synthesized via hydrolysis of poly-2-methyl-2-oxazoline (PMeOx), which was prepared by cationic ring-opening polymerization of the oxazoline five-membered ring. Herein, a kinetic study of the ring-opening polymerization reaction is discussed. The nuclear magnetic resonance spectrum of PMeOx verified the presence of repeating units and terminal groups in the polymer's structure. Molar ratios of PEI and PMeOx were characterized using size exclusion chromatography with low-polydispersity polymer chains as the controlled polymerization reaction. PEI and PMeOx exhibited narrow particle size distribution with hydrodynamic radii of 89 and 67 nm, respectively, as determined via dynamic light scattering analysis. In addition, atomic forces and scanning electron microscopy were used to investigate the topography of the PEI thin films. Poly(glycidyl methacrylate) P(GMA) was grafted onto a PEI chain in the presence of trimethylolpropane triacrylate (TMPTA) as the crosslinking agent to synthesize the P(GMA-PEI-TMPTA) tripolymer via free radical polymerization using gamma irradiation. The thermal characterization of the P(GMA-PEI-TMPTA) tripolymer was conducted using thermogravimetric analysis and differential scanning calorimeter. Generally, the thermal stability of the P(GMA-PEI-TMPTA) tripolymer was improved at low-glycidyl methacrylate concentrations. The prepared tripolymer could be used as effective packaging materials for electronics industries.

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Novel bifunctional dispersing agents from waste PET packaging materials and interaction with cement

Cited by 27 publications

References 51 publications

New organic compounds detection and potential removal in crude phosphoric acid using waste sludge

New organic compounds detection and potential removal in crude phosphoric acid using waste sludge

Chemical recycling of PET: A stepping‐stone toward sustainability

Radiation crosslinking of linear polyethyleneimine‐based nanoparticles grafted to poly(glycidyl methacrylate) via trimethylolpropane triacrylate as potential electronic packaging material

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