Graft copolymerization of glycidyl methacrylate onto delignified kenaf fibers through pre-irradiation technique

Sharif, Jamaliah; Mohamad, Siti Fatahiyah; Othman, Nor Azilah Fatimah; Bakaruddin, Nurul Azra; Osman, Hasnul Nizam; Güven, Olgun

doi:10.1016/j.radphyschem.2013.05.035

Cited by 41 publications

(26 citation statements)

References 17 publications

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“…Both GMA-g-NWF and IRP samples exhibits common stretching for polyethylene/polypropylene (PE/PP) at 2913, 2843, 1464, 1370 and 718 cm −1 which attributed to C-H stretch (PP), C-H stretch (PE), CH 2 stretch (PP & PE), symmetric CH 3 deformation stretch (PP) and CH 2 stretch (PE) respectively, as similar described in other researcher [29]. Additional stretching detected at 1732 and 1140 cm −1 assigned for C=O and C-O vibration which originates from -COO-ester group of GMA [30]. However, additional stretching was found such as N-H stretching at 3201 cm −1 , N-H bending at 1524 cm −1 , C-N alkyl group stretching at 1256 and 1156 cm −1 which attributed from aliphatic amine groups [25].…”

Section: Elemental Composition Analysissupporting

confidence: 79%

Selectivity of Copper by Amine-Based Ion Recognition Polymer Adsorbent with Different Aliphatic Amines

et al. 2019

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This paper investigates the selectivity of GMA-based-non-woven fabrics adsorbent towards copper ion (Cu) functionalized with several aliphatic amines. The aliphatic amines used in this study were ethylenediamine (EDA), diethylenetriamine (DETA), triethylenetetramine (TETA), and tetraethylenepentamine (TEPA). The non-woven polyethylene/polypropylene fabrics (NWF) were grafted with glycidyl methacrylate (GMA) via pre-radiation grafting technique, followed by chemical functionalization with the aliphatic amine. To prepare the ion recognition polymer (IRP), the functionalized amine GMA-grafted-NWF sample was subjected to radiation crosslinking process along with the crosslinking agent, divinylbenzene (DVB), in the presence of Cu ion as a template in the matrix of the adsorbent. Functionalization with different aliphatic amine was carried out at different amine concentrations, grafting yield, reaction temperature, and reaction time to study the effect of different aliphatic amine onto amine density yield. At a concentration of 50% of amine and 50% of isopropanol, EDA, DETA, TETA, and TEPA had attained amine density around 5.12, 4.06, 3.04, and 2.56 mmol/g-ad, respectively. The amine density yield decreases further as the aliphatic amine chain grows longer. The experimental condition for amine functionalization process was fixed at 70% amine, 30% isopropanol, 60 °C for grafting temperature, and 2 h of grafting time for attaining 100% of grafting yield (Dg). The prepared adsorbents were characterized comprehensively in terms of structural and morphology with multiple analytical tools. An adsorptive removal and selectivity of Cu ion by the prepared adsorbent was investigated in a binary metal ion system. The IRP samples with a functional precursor of EDA, the smallest aliphatic amine had given the higher adsorption capacity and selectivity towards Cu ion. The selectivity of IRP samples reduces as the aliphatic amine chain grows longer, EDA to TEPA. However, IRP samples still exhibited remarkably higher selectivity in comparison to the amine immobilized GMA-g-NWF at similar adsorption experimental conditions. This observation indicates that IRP samples possess higher selectivity after incorporation of the ion recognition imprint technique via the radiation crosslinking process.

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Section: Elemental Composition Analysissupporting

confidence: 79%

Selectivity of Copper by Amine-Based Ion Recognition Polymer Adsorbent with Different Aliphatic Amines

et al. 2019

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“…The propagation of grafting chains took place due to availability of more active species and sufficient time. The marginal increase in degree of grafting versus time was also reported by Sharif et al [20]. Conclusively, the results reveal that the grafting yields in the present study are depended on monomer concentration and reaction time.…”

Section: Effect Of Reaction Time and Monomer Concentration On Graftinsupporting

confidence: 89%

“…The pre-treatment was done according to the method in our previous study [20]. The pH of the sodium chlorite (NaClO 2 ) solution of 0.7% was adjusted to 4 and the dried kenaf bast fibers were treated with sodium chlorite solution at 70 °C for 6 h under continuous stirring.…”

Section: Pre-treatment Of Kenaf Fibersmentioning

confidence: 99%

Modification of kenaf fibers by single step radiation functionalization of 2-hydroxyl methacrylate phosphoric acid (2-HMPA)

et al. 2019

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Phosphorylated adsorbent is commonly used in the extraction of rare earth metals and radioactive waste because of its high affinity in acidic condition. In this study, adsorbent containing phosphoric acid groups was synthesized by one-step radiation-induced grafting of 2-hydroxyl methacrylate phosphoric acid monomer (2-HMPA) onto kenaf fibers. The kenaf fibers were pre-treated with sodium chlorite prior grafting process. The incorporation of poly (2-HMPA) in the bleached kenaf fibers was confirmed by Fourier transform infrared spectroscopy (FTIR), FT-IR chemical imaging and scanning electron microscopy (SEM). The structural property was investigated using X-ray diffraction (XRD). The result revealed optimum grafting yield of 91.3% with 10% 2-HMPA and 50 kGy at 40 °C for 3 h. The performance of the synthesized adsorbent showed almost complete thorium adsorption. The removal efficiency of 99.9% thorium from aqueous solution was achieved using fibrous adsorbent at an initial thorium concentration of 10 mg/L, a reaction time of 3 h, and pH of 3 at room temperature. This single step combining grafting and functionalization to modify kenaf fibers showed sufficient property for application of natural fibers as adsorbent.

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“…Grafting percentage of about 100% could be easily achieved at 5.0% CMS concentration in less than one hour. 173 In a similar work with delignified kenaf fibers, Sharif et al 174 showed that a higher amount of glicydyl methacrylate (GMA) grafting can be achieved with lower doses. The lignin in kenaf was removed by treatment with sodium chlorite solution, reducing the total content from 14.3 wt% down to 3.3 wt%.…”

Section: Radiation-induced Grafting For Modification Of Fiber Surfacementioning

confidence: 99%

“…At an absorbed dose of 50kGy, a reaction time of 3h, temperature of 40 C, and monomer concentration of 3 wt%, it was possible to achieve a Dg of about 150%. 174 Fibers from the water hyacinth plant (Eichhornia crassipes) were functionalized by Madrid et al 175 using radiation-induced graft polymerization of GMA through g-rays from a 60 Co source. Simultaneous grafting was employed here, where the water hyacinth fibers were irradiated in a nitrogen atmosphere in the presence of GMA dissolved in a water/methanol solvent.…”

Section: Radiation-induced Grafting For Modification Of Fiber Surfacementioning

confidence: 99%

Re-Emerging Field of Lignocellulosic Fiber – Polymer Composites and Ionizing Radiation Technology in their Formulation

Güven¹,

Monteiro²,

Moura³

et al. 2016

Polymer Reviews

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131

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Natural cellulose-based fibers offer low cost, low density composite reinforcement with good strength and stiffness. Because of their annual renewability and biodegradability, natural fibers have materialized as environmentally-friendly alternatives to synthetic fibers in the last two decades. They are replacing synthetic materials in some traditional composites in industrial manufacturing sectors such as automotive, construction, furniture, and other consumer goods. In this work, the use of lignocellulosic fibers in green materials engineering, particularly their application as polymeric composite reinforcement and surface treatment via ionizing radiation are reviewed. Because these cellulose-based materials are intrinsically hydrophilic, they require surface modification to improve their affinity for hydrophobic polymeric matrices, which enhances the strength, durability, and service lifetime of the resulting lignocellulosic fiber-polymer composites. In spite of a long history of using chemical methods in the modification of material surfaces, including the surface of lignocellulosic fibers, recent research leans instead towards application of ionizing radiation. Ionizing radiation methods are considered superior to chemical methods, as they are viewed as clean, energy saving, and environmentally friendly. Recent applications of controlled ionizing radiation doses in the formulation of natural fiber -reinforced polymeric composites resulted in products with enhanced fiberpolymer interfacial bonding without affecting the inner structure of lignocellulosic fibers. These applications are critically reviewed in this contribution.

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Graft copolymerization of glycidyl methacrylate onto delignified kenaf fibers through pre-irradiation technique

Cited by 41 publications

References 17 publications

Selectivity of Copper by Amine-Based Ion Recognition Polymer Adsorbent with Different Aliphatic Amines

Selectivity of Copper by Amine-Based Ion Recognition Polymer Adsorbent with Different Aliphatic Amines

Modification of kenaf fibers by single step radiation functionalization of 2-hydroxyl methacrylate phosphoric acid (2-HMPA)

Re-Emerging Field of Lignocellulosic Fiber – Polymer Composites and Ionizing Radiation Technology in their Formulation

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