Programing polyurethane with systematic presence of graphene-oxide (GO) and reduced graphene-oxide (rGO) platelets for adjusting of heat-actuated shape memory properties

Panahi‐Sarmad, Mahyar; Goodarzi, Vahabodin; Amirkiai, Arian; Noroozi, Mina; Abrisham, Mahbod; Dehghan, Parham; Shakeri, Yasaman; Karimpour‐Motlagh, Navid; Hajipoor, Fatemeh Poudineh; Khonakdar, Hossein Ali; Asefnejad, Azadeh

doi:10.1016/j.eurpolymj.2019.06.034

Cited by 48 publications

(37 citation statements)

References 86 publications

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“…Furthermore, in the spectrum of the TPU, the absence of any characteristic peaks in the range of 2,250-2,270 cm −1 (free NCO groups) indicates that the neat PU is well synthesized. [24] In addition, the d spacing between graphene platelets was measured by the XRD analysis. Based on Figure 1d, the characteristic peak of graphite at 2θ = 24.2 that is related to d 002 , transferred to 2θ = 9.9 (d 001 ) in the case of GO.…”

Section: Analysis Of Synthesized Gomentioning

confidence: 99%

“…Based on the results, an enhancement in the d spacing of GO platelets has occurred when compared to graphite sheets. [24] 3.2 | Morphology assessment of the nanocomposites Figure 2 demonstrates the fractured morphology of nanocomposites that were evaluated via scanning electron microscopy (SEM). Figure 2a exhibits the SEM micrograph of the neat PU while Figures 2b-d represent 0.5, 1.0, and 2.0 wt% PU nanocomposites including GO, respectively.…”

Section: Analysis Of Synthesized Gomentioning

confidence: 99%

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Synthesis and design of polyurethane and its nanocomposites derived from canola‐castor oil: Mechanical, thermal and shape memory properties

Dehghan

Noroozi

Sadeghi

et al. 2020

Journal of Polymer Science

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The recent global pandemic and its tremendous effect on the price fluctuations of crude oil illustrates the side effects of petroleum dependency more evident than ever. Over the past decades, both academic and industrial communities spared endless efforts in order to replace petroleum-based materials with bioderived resources. In the current study, a series of shape memory polymer composites (SMPC's) was synthesized from epoxidized vegetable oils, namely canola oil and castor oil fatty acids (COFA's) as a 100% bio-based polyol and isophorone diisocyanate (IPDI) as an isocyanate using a solvent/catalyst-free method in order to eventuate polyurethanes (PU's). Thereafter, graphene oxide (GO) nanoplatelets were synthesized and embedded in the neat PU in order to overcome the thermomechanical drawbacks of the neat matrix. The chemical structure of the synthesized components, as well as the dispersion and distribution levels of the nanoparticles, was characterized. In the following, thermal and mechanical properties as well as shape memory behavior of the specimens were comprehensively investigated. Likewise, the thermal conductivity was determined. This study proves that synthesized PU's based on vegetable oil polyols, including graphene nanoparticles, exhibit proper thermal and mechanical properties, which make them stand as a potential candidate to compete with traditional petroleum-based SMPC's.

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Section: Analysis Of Synthesized Gomentioning

confidence: 99%

Section: Analysis Of Synthesized Gomentioning

confidence: 99%

Synthesis and design of polyurethane and its nanocomposites derived from canola‐castor oil: Mechanical, thermal and shape memory properties

Dehghan

Noroozi

Sadeghi

et al. 2020

Journal of Polymer Science

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“…Researchers have recently turned their attention toward shape memory polymers (SMPs) due to their distinctive properties such as low density, fast response, chemical stability, facile processability, biodegradability, biocompatibility, and so on. Beside of these properties, shape memory effect, which makes these polymers able to recover their original shape upon exposure to suitable stimuli such as heat, water, electrical and magnetic fields, pH, and light, is another unique feature which leads SMPs to be the subject of many studies 1,2 …”

Section: Introductionmentioning

confidence: 99%

“…Results indicated that these nanocomposites represented electro‐responsive shape memory behavior and the addition of GO nanosheets did not alter the SF ratio, while the SR ratios of the nanocomposites have been diminished. Panahi‐Sarmad et al 2 prepared shape memory thermoplastic polyurethane (TPU) nanocomposites based on different nanofillers, including GO, reduced GO nanosheets (rGO), and hybrid‐type filler of GO and rGO nanosheets (GO:rGO). They results show that incorporating of each kind of nanofillers in TPU matrix has improved mechanical and shape memory properties of the resultant nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Effects of graphene quantum dot (GQD) on photoluminescence, mechanical, thermal and shape memory properties of thermoplastic polyurethane nanocomposites

Nejad

Babaie

Bagheri

et al. 2020

Polymers for Advanced Techs

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A group of shape memory polyurethane‐based nanocomposites containing graphene quantum dot nanoparticles (GQDs) were prepared via in‐situ polymerization method. GQD nanoparticles were synthesized by a facile and rapid microwave‐assisted method and characterized by Fourier‐transform infrared spectroscopy (FTIR), X‐ray diffraction pattern, field emission scanning microscopy, transmission electron microscopy, and fluorescence analysis. Chemical structure and hydrogen bonding index (HBI[C=O]) of the nanocomposites were analyzed via FTIR spectra. The results show that the incorporation of GQDs in PU matrix reduces HBI(C=O) of nanocomposites. Crystalline structure and thermal properties of the nanocomposites were investigated by differential scanning calorimetry. As results indicate, nucleation effect of GQDs raises crystallinity content of the samples. Mechanical examinations indicate that incorporation of GQDs improves Young's modulus of the nanocomposites, while their elongation at break values are reduced. In addition, shape memory analyses reveal that the presence of GQDs in PU matrix increases the shape fixity ratios in nanocomposites.

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“… 13 − 15 For example, GO can be used to stabilize polymerization, 16 , 17 improve the mechanical and chemical stability of polymers, 18 , 19 and attain excellent shape memory properties. 20 GO has been demonstrated as an excellent adsorbent for dyes, 21 , 22 heavy metal ions, and other hazardous chemicals. 23 − 25 However, many challenges still need to be overcome to achieve full use of the adsorption properties of GO.…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide–Crospolyvinylpyrrolidone Hybrid Microspheres for the Efficient Adsorption of 2,4,6-Trichlorophenol

2020

ACS Omega

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Microspheres of the graphene oxide and crospolyvinylpyrrolidone composite (GO–PVPP) were prepared via suspension polymerization and investigated for the adsorption of 2,4,6-trichlorophenol (2,4,6-TCP) from wastewater. The microspheres were thoroughly characterized using scanning electron microscopy, infrared spectroscopy, N 2 physisorption, elemental analysis, X-ray diffraction, and thermogravimetric analysis. The GO–PVPP microspheres comprised GO sheets on the surface and demonstrated good thermal stability, good swelling rate, and excellent adsorption capacity of 2,4,6-TCP (up to 466.77 mg/g). The adsorptions were determined as a function of pH, temperature, adsorbent loading, adsorption time, and initial content of 2,4,6-TCP in the solutions. The sorption kinetics was satisfactorily modeled using the pseudo-second-order rate equation, and the sorption equilibrium can be described using the Freundlich model. The 2,4,6-TCP adsorption by GO–PVPP was shown to be endothermic and spontaneous. The reusability of GO–PVPP was also demonstrated by the adsorption and desorption cycles.

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Programing polyurethane with systematic presence of graphene-oxide (GO) and reduced graphene-oxide (rGO) platelets for adjusting of heat-actuated shape memory properties

Cited by 48 publications

References 86 publications

Synthesis and design of polyurethane and its nanocomposites derived from canola‐castor oil: Mechanical, thermal and shape memory properties

Synthesis and design of polyurethane and its nanocomposites derived from canola‐castor oil: Mechanical, thermal and shape memory properties

Effects of graphene quantum dot (GQD) on photoluminescence, mechanical, thermal and shape memory properties of thermoplastic polyurethane nanocomposites

Graphene Oxide–Crospolyvinylpyrrolidone Hybrid Microspheres for the Efficient Adsorption of 2,4,6-Trichlorophenol

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