Influence of γ-ray modified MWCNTs on the structural and thermal properties of high-density polyethylene

Ghafoor, Bilal; Mehmood, Malik Sajjad; Shahid, U.N. Mohamed; Baluch, M. A. A.; Yasin, Tariq

doi:10.1016/j.radphyschem.2016.04.004

Cited by 18 publications

(8 citation statements)

References 25 publications

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“…The presence of defective sites within MWCNTs and the role of gamma irradiation for enhancing the structural quality of MWCNTs for γMWCNTs can be used here to explain the difference between the two sets of groups. It is well established that γ-irradiation of MWCNTs with a dose value of ≤100 kGy improves their quality by eliminating the already present defective sites within MWCNTs matrix [ 44 ], and irradiating in open air is also responsible for inducing functional groups at the surface of MWCNTs. These are –C=O, –COO, –C–O, –C–C–, and –C=C– containing functional groups, and have the potential of neutralizing the radiation-induced free radicals while reacting with primary free radicals [ 33 , 44 , 45 ].…”

Section: Resultsmentioning

confidence: 99%

A Multi-Attribute Decision-Making Model for the Selection of Polymer-Based Biomaterial for Orthopedic Industrial Applications

et al. 2022

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The potential of quantifying the variations in IR active bands was explored while using the chemometric analysis of FTIR spectra for selecting orthopedic biomaterial of industrial scale i.e., ultra-high molecular weight PE (UHMWPE). The nano composites UHMWPE with multi-walled carbon nano-tubes (MWCNTs) and Mg-silicate were prepared and irradiated with 25 kGy and 50 kGy of gamma dose. Principal component analysis (PCA) revealed that first three principal components (PCs) are responsible for explaining the >99% of variance in FTIR data of UHMWPE on addition of fillers and/or irradiation. The factor loadings plots revealed that PC-1 was responsible for explaining the variance in polyethylene characteristics bands and the IR active region induced by fillers i.e., 440 cm−1, 456 cm−1, from 900–1200 cm−1, 1210 cm−1, 1596 cm−1, PC-2 was responsible for explaining the variance in spectra due to radiation-induced oxidation and cross linking, while the PC-3 is responsible for explaining the variance induced because of IR active bands of MWCNTs. Hierarchy cluster analysis (HCA) was employed to classify the samples into four clusters with respect to similarity in their IR active bands which is further confirmed by PCA. According to multi attribute analysis with PCA and HCA, 65 kGy irradiated sample is optimum choice from the existing alternatives in the group of irradiated pristine UHMWPE, UHMWPE/Mg-silicate irradiated with 25 kGy of gamma dose was the optimum choice for UHWMPE/Mg-silicate nano composites, and UHMWPE/γMWCNTs composites containing 1.0% dof γ MWCNTs for UHMWPE/MWCNTs nanocomposites, respectively. The results show the effectiveness of quantifying the variance for decision as far as optimization of biomaterials in orthopedic industrial applications is concerned.

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Section: Resultsmentioning

confidence: 99%

A Multi-Attribute Decision-Making Model for the Selection of Polymer-Based Biomaterial for Orthopedic Industrial Applications

et al. 2022

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“…Furthermore, no agglomerates are seen in these nanocomposites as compared with unirradiated FMWCNT having the same content. The reason behind the change in the nanocomposites' morphology between unirradiated and irradiated samples is attributed to the formation of radiation crosslinking network among the PU chains and γ‐FMWCNT .…”

Section: Resultsmentioning

confidence: 99%

Application of polyurethane/gamma‐irradiated carbon nanotubes composites as antifouling coat

2018

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The aim of this study is to avoid or reduce the risks of biofouling of ship hulls, using polyurethane/γ‐irradiated functionalized multiwall carbon nanotubes (PU/FMWCNT) nanocomposites as a coating for wood. These nanocomposites were characterized by Fourier transform infrared spectroscopy (FTIR) measurements, transmission electron microscopy (TEM), and field emission scanning electron microscopy (FESEM), and hardness, adhesion, and bending of the coated samples were examined. The antifouling ability of PU/γ‐irradiated FMWCNTs was studied by using an algae test. FTIR proved the presence of COOH group on the surface of MWCNT, while the FESEM results showed good dispersion of FMWCNT in polyurethane matrix. Mechanical properties of the coated wooden samples were improved; the samples showed good hardness and very good adhesion, and reasonable flexural modulus. The antifouling property of the coatings showed that 0.1 and 0.2 wt% FMWCNTs immobilized on polyurethane composite and irradiated for 100 kGy, were the most efficient antifouling coat when immersed in Chlorella vulgaris microalgae. POLYM. COMPOS., 39:E1196–E1207, 2018. © 2018 Society of Plastics Engineers

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“…Reports in the literature demonstrate that radiation treatment for polymers is employed to induce crosslinking of polymer chains, improving mechanical properties, or for the sterilization of medical devices [291][292][293][294][295]. The effects of radiation on polymers depend on the polymer chain and the energy absorbed after irradiation.…”

Section: Ionizing Radiationmentioning

confidence: 99%

Drug Micro-Carriers Based on Polymers and Their Sterilization

Costa¹,

Pereira²,

Silva³

et al. 2018

ChChT

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Influence of γ-ray modified MWCNTs on the structural and thermal properties of high-density polyethylene

Cited by 18 publications

References 25 publications

A Multi-Attribute Decision-Making Model for the Selection of Polymer-Based Biomaterial for Orthopedic Industrial Applications

A Multi-Attribute Decision-Making Model for the Selection of Polymer-Based Biomaterial for Orthopedic Industrial Applications

Application of polyurethane/gamma‐irradiated carbon nanotubes composites as antifouling coat

Drug Micro-Carriers Based on Polymers and Their Sterilization

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