Polyurethane/poly(ethylene‐<i>co</i>‐ethyl acrylate) and functional carbon black‐based hybrids: Physical properties and shape memory behavior

Kausar, Ayesha; Siddiq, Muhammad

doi:10.1002/app.43481

Cited by 6 publications

(5 citation statements)

References 41 publications

(72 reference statements)

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“…Figure shows the FTIR spectra of synthesized polyurethane and polyurethane nanocomposite gels. Based on the results of other researchers, the peaks at 1594 cm −1 and 3306 cm −1 correspond to the vibrations of the NH group. Also, the absence of peaks at 2260 cm −1 (cyanate) and 3500 cm −1 (hydroxyl) confirm the completion of the synthesis of polyurethane gel.…”

Section: Resultsmentioning

confidence: 79%

Conductive shape‐memory polyurethane/multiwall carbon nanotube nanocomposite aerogels

Teymouri

Kokabi

Alamdarnejad

2019

J of Applied Polymer Sci

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Smart nanocomposite aerogels have promising applications. In this work, different percentages of multiwall carbon nanotube (MWCNT) added into synthesized polyurethane (PU) gel in the molten state, using a two-roll mill. By soaking the PU/MWCNT nanocomposite gel into the water, PU/MWCNT hydrogels containing more than 90 wt % of water were prepared. The obtained hydrogels were freeze-dried to produce aerogel counterparts. The aerogels were fully characterized using mercury porosimetry, differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), and field emission scanning electron microscopy (FE-SEM). The electrical percolation threshold of conductive aerogel system was measured. The shape-memory behavior of PU/MWCNT nanocomposite aerogels was evaluated by dynamic mechanical thermal analysis (DMTA). The results of the DMTA showed that by adding 2.75 wt % of MWCNT, the recovery ratio and storage modulus of the PU/MWCNT nanocomposite aerogel increased 42 and 180%, respectively. The electrical conductivity of the system also increased three orders of magnitude at the percolation threshold.

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Section: Resultsmentioning

confidence: 79%

Conductive shape‐memory polyurethane/multiwall carbon nanotube nanocomposite aerogels

Teymouri

Kokabi

Alamdarnejad

2019

J of Applied Polymer Sci

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“…Shape‐memory materials, which have been widely used in the field of drug delivery system and aerospace, are one kind of smart materials that have the functionality to keep a temporary shape, and can recover to their original shape under an external stimulation, such as water stimulation, heat stimulation, light stimulation, electrical stimulation, and so on …”

Section: Resultsmentioning

confidence: 99%

Recyclable, shape‐memory, and self‐healing soy oil‐based polyurethane crosslinked by a thermoreversible Diels–Alder reaction

Zheng

Tian

Fan

et al. 2017

J of Applied Polymer Sci

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The recyclable, shape-memory, and self-healing soy oil-based polyurethane (S-PU) networks were constructed by the thermoreversible Diels-Alder (DA) reaction between S-PU (sealed with furfuryl alcohol) and 1,5-bis(maleimido)-2-methylpentane. The DA and retro-DA reactions between furan and maleimide were investigated by Fourier transform infrared spectroscopy, differential scanning calorimetry, solubility, and recycle testing. Moreover, the shape-memory properties of the S-PU networks were studied by qualitative recovery testing and quantitative cyclic tensile testing. Furthermore, the self-healing properties of S-PU networks were confirmed by cut, scratch, and tensile testing. The results showed that, compared to the traditional S-PU, the novel S-PU prepared in this work was recyclable and self-healing. And although both of them have shape-memory effect, the novel S-PU has a higher shape fixed rate and shape recovered rate than the traditional S-PU.

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“…The change can be due to the nature of the material in support and the carbon precursor used in carbon nanotubes processing. The absorption peak at 2148 cm -1 relates to the bond C=C (Kausar, 2016) and shows the presence of -OH at 3010 cm -1.…”

Section: Ftir Analysis Of the Raw Cnts P-cnts And Peg-cntsmentioning

confidence: 99%

Comparative Adsorptive Removal of Selected Heavy Metals from Battery Wastewater by Purified and Polyethylene Glycol Modified Carbon Nanotubes

et al. 2021

Preprint

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Comparative adsorption study of some toxic metals (Ni, Fe, Cu, Cd, and Pb) from battery industrial effluent by purified and polyethylene glycol-modified carbon nanotubes (CNTs) is reported. The as-prepared CNTs via chemical vapour deposition method (A-CNTs), its acid purified form (P-CNTs), and polyethylene glycol functionalized form (PEG-CNTs) were characterized by HRTEM, BET, HRSEM, FTIR and XRD. The HRSEM and HRTEM micrograph revealed the formation of multi-walled tubular network structures of different inner and outer diameter. The BET study of PEG-CNTs and purified CNTs showed surface areas of 970.81 m2/g and 781.88 m2/g, respectively. The nanomaterials batch adsorption effect of various parameters such as contact time, nano-adsorbent dosage and temperature was conducted. The optimum equilibrium to achieve maximum removal of Cd (83.41 %), Ni (92.79 %), Fe (95.93%), Pb (97.16 %) Cu (99.9 9%) using PEG-CNTs was 90 min of contact time, 0.3 g of nano-adsorbent dosage and 60 oC temperature. While the maximum percentage removal efficiencies accomplished using P-CNTs under the same applied conditions were Cd (78.64 %), Ni (76.12 %), Fe (92.87 %), Pb (90.7 2%) Cu (99.09 %). PEG-CNTs was seen as more effective than P-CNTs. Adsorption data of Ni on P-CNTs followed Langmuir isotherm while the adsorption equilibrium model (Freundlich isotherm) of Ni, Fe, Cu and Pb on PEG-CNTs were fitted well. However, in both cases, the sorption kinetic study followed the pseudo-second-order model. The thermodynamics showed that the removal of toxic metals from battery wastewater was spontaneous and endothermic irrespective of the nano-adsorbents. The study found that surface modification of CNTs by polyethylene glycol adequately improved the nanotubes, thus leading to relatively adsorption capacities of heavy metals from industrial battery effluent.

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Polyurethane/poly(ethylene‐co‐ethyl acrylate) and functional carbon black‐based hybrids: Physical properties and shape memory behavior

Cited by 6 publications

References 41 publications

Conductive shape‐memory polyurethane/multiwall carbon nanotube nanocomposite aerogels

Conductive shape‐memory polyurethane/multiwall carbon nanotube nanocomposite aerogels

Recyclable, shape‐memory, and self‐healing soy oil‐based polyurethane crosslinked by a thermoreversible Diels–Alder reaction

Comparative Adsorptive Removal of Selected Heavy Metals from Battery Wastewater by Purified and Polyethylene Glycol Modified Carbon Nanotubes

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