Selectivity of Acrylic Acid Radiation Grafted Non-Woven Polypropylene Sheets towards Some Heavy Metals Ions

Hegazy, Dalia E.

doi:10.4236/ojpchem.2012.21002

Cited by 15 publications

(12 citation statements)

References 20 publications

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“…Thus, more radicals were available to take part in the grafting polymerization reaction hence the increase in D g . This results is supported by Hegazy (2012) that grafted AAC onto non-woven polypropylene sheet. Meanwhile at 10 kGy, D g increased from 16% to 57% when the grafting time increased from 1 to 3 h. As the time of grafting increased, the number of monomer molecules that diffused onto PTFE chains increased.…”

Section: Results and Discussion Effect Of Irradiation Dose And Graftimentioning

confidence: 52%

Modification of PTFE Flat Sheet Film via Radiation Induced Grafting Polymerization with Acrylic Acid

Ghani¹,

Hamzah²,

Mohamed³

2020

JSM

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Polytetrafluoroethylene (PTFE) flat sheet film was modified with acrylic acid (AAC) by radiation induced grafting polymerization (RIGP) method using electron beam. The adsorbed doses were varied from 10 to 50 kGy, time of grafting from 1 to 3 h and monomer concentration and temperature were kept constant at 30 wt. % and 40ºC. The degree of grafting (D g) and equilibrium degree of swelling (EDS) of the grafted films were then determined. The films were further characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), atomic force microscope (AFM), X-ray diffraction (XRD), and optical water contact angle. D g within the range of 17% to 210% were obtained for doses from 10 to 50 kGy within time of grafting from 1 to 3 h. The grafted film (PTFE-g-AAC) showed increased hydrophilicity leading to an increase in EDS. The successful grafting process was confirmed by FTIR results that showed characteristics peaks for carbonyl and hydroxyl group and a decrease in crystallinity for the PTFE-g-AACfilm. SEM images showed that PTFE-g-AAC films had less fibrillar compared to PTFE film and was consistent with the decrease in roughness for the PTFE-g-AAC film. This study indicated that modifying PTFE film by grafting AAC could significantly improve the hydrophilicity of PTFE film. The PTFE-g-AAC films has potential as a heavy metal adsorbent as it can remove at least 75% of Fe ion and 50 % of Pb ion from competitive media.

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Section: Results and Discussion Effect Of Irradiation Dose And Graftimentioning

confidence: 52%

Modification of PTFE Flat Sheet Film via Radiation Induced Grafting Polymerization with Acrylic Acid

Ghani¹,

Hamzah²,

Mohamed³

2020

JSM

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“…This can be explained due to PLDLA and AAc have the same stretching bonds in chemical structure. Besides, the adsorption peaks of carboxyl functional group at around 1730 cm -1 from polymerized AAc, can be overlapped by the inherent carboxyl functional groups present in the PLDLA 27,29,30 . After collagen immobilization, ATR-IR spectrum of the PLDLA-Col membrane confirmed the formation of amide bonds on the material surface by the appearance of amide I and amide II absorption bands, characteristics of collagen molecule.…”

Section: Discussionmentioning

confidence: 99%

Surface characterization and osteoblast-like Cells culture on collagen modified PLDLA scaffolds

et al. 2014

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Surface modification techniques based on the grafting of chemical functional groups and immobilization of bioactive molecules have been used to improve biocompatibility and clinical performance of bioabsorbable scaffolds in tissue engineering and medicine regenerative applications. This study aimed at developing and characterizing a biomimetic surface to stimulate bone regeneration by a simple and low-cost method of surface biofunctionalization of the poly (L-co-D,L lactic acid)-PLDLA scaffolds. The method was obtained by grafting reaction of carboxyl groups (-COOH) on their surface via acrylic acid (AAc) polymerization process, followed by immobilization of collagen type I (Col). Such approach resulted in a surface morphology markedly modified after treatment, with increase of pores and roughness on PLDLA-AAc surfaces and a network of fibrillar collagen deposition in nonspecific areas of PLDLA-Col surfaces. The cytocompatibility of collagen-immobilized scaffolds was significantly improved in terms of cellular adhesion, proliferation, collagen synthesis and maintenance of osteoblast-like phenotype, indicating, therefore, the fundamental role of collagen protein over the biological interactions that occur by bio-recognition mimetic mechanisms at biomaterials interface. These results indicate that the surface modification method used here may be useful as a strategy to develop biofunctional scaffolds, which provide a more successful clinical application of biomaterials in the tissue engineering field.

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“…(1). It can be seen that the graft yield was increased by increasing the irradiation dose as a result of the increasing of the formed free radicals, up to irradiation dose of 30 kGy, and the yield then tended to slightly increase at a slow rate due to the formation of homopolymer [31]. The highest homogenous graft yield obtained (16 %) of PAN onto the Jute fibres was achieved by the use of 40% monomer concentration, 30kGy irradiation dose and solvent mixture of H2O/EtOH (1:1).…”

Section: Gamma Radiation-induced Grafting Of Acrylonitrile Monomer Onmentioning

confidence: 98%

Acid Dyes Removal from Aqueous Solutions Utilizing Amidoximated Jute Fibers under the Effect of Gamma Irradiation

Hassan¹,

Attya²,

Zohdy³

et al. 2019

Arab Journal of Nuclear Sciences and Applications

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Jute fibers were graft-copolymerized with acrylonitrile using gamma radiation technique. The nitrile groups attached to the grafted fibers were converted into amidoxime groups, through an amidoximation process, for using as an adsorbent for the acid dyes from the textile wastewater. The graft yield as a function of the irradiation dose was investigated. The amidoximated Jute fibers were characterized by Fourier transform infrared (FTIR) and X-ray diffraction (XRD). The thermal stability of modified Jute fibers was also investigated by thermogravimetric analysis (TGA). The kinetic parameters of the adsorption process and the effective conditions on the adsorption capacity, such as the pH and contact time, were also investigated. The grafting of the Jute fibers with ACN and the amidoximation process of the nitrile groups were confirmed using FTIR technique. The results indicated that, the dye adsorption was enhanced at low pH of 4 and obeyed the pseudo second order kinetic model.

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Selectivity of Acrylic Acid Radiation Grafted Non-Woven Polypropylene Sheets towards Some Heavy Metals Ions

Cited by 15 publications

References 20 publications

Modification of PTFE Flat Sheet Film via Radiation Induced Grafting Polymerization with Acrylic Acid

Modification of PTFE Flat Sheet Film via Radiation Induced Grafting Polymerization with Acrylic Acid

Surface characterization and osteoblast-like Cells culture on collagen modified PLDLA scaffolds

Acid Dyes Removal from Aqueous Solutions Utilizing Amidoximated Jute Fibers under the Effect of Gamma Irradiation

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