Preparation of polyurethane composites reinforced with halloysite and carbon nanotubes

Pourmohammadi‐Mahunaki, Mohammadali; Haddadi‐Asl, Vahid; Roghani‐Mamaqani, Hossein; Koosha, Mojtaba; Yazdi, M. H.

doi:10.1002/pc.25838

Cited by 34 publications

(16 citation statements)

References 49 publications

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“…With a further increase in the nanofiller content, the intensity of the hydrogen-bonded N-H stretching was slightly decreased due to a decrease in phase separation. [27,28] In the research conducted by Pourmohammadi-Mahunaki et al, [29] the DPS was measured by a similar approach, and it was observed that with the increase in the CNT content from 0.1 to 0.8, the DPS values slightly increased.…”

Section: Chemical Characterizationmentioning

confidence: 97%

Thermoplastic polyurethane/multiwalled carbon nanotubes nanocomposites: Effect of nanoparticle content, shear, and thermal processing

2021

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In this study, nanocomposites of thermoplastic polyurethane and multiwalled carbon nanotubes (MWCNTs) with varying nanofiller content (ranging from 0 wt% to 1 wt%) were prepared via the melt compounding method. Moreover, the influence of shear field and thermal processing on electrical conductivity has been evaluated. The evaluation of the phase separation degree revealed that with the increase in the nanofiller content from 0% to 0.4%, the phase separation degree increased by 25%. However, a further increase in the nanoparticle content slightly decreased the phase separation degree. Moreover, by increasing the nanofiller content up to 0.4%, the melting temperature and the melting enthalpy of the soft phase as well as the melting temperature of the hard phase increased. With the increase in the nanofiller content to 0.4%, a 3D network of MWCNTs was developed, corroborating the formation of an electrically conductive nanocomposite. The conductivity increased 3750-fold in the quenched and 5000-fold in the annealed samples with the increase in the nanofiller content from 0.2% to 1%. In general, the annealed nanocomposites featured lower conductivity than the quenched ones. The effect of the shear on conductivity was nanofiller content-dependent. Exposure to shear below and above the percolation threshold decreased and increased the electrical conductivity, respectively.

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Section: Chemical Characterizationmentioning

confidence: 97%

Thermoplastic polyurethane/multiwalled carbon nanotubes nanocomposites: Effect of nanoparticle content, shear, and thermal processing

2021

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“…Many researchers have reported the improvement of thermo-mechanical and chemical properties of polymer HNT samples. [23][24][25][26][27][28][29][30][31][32] HNT can raise the fracture stiffness of epoxy system minus reducing the modulus, strength and thermal constancy. [33] Moreover, HNT enhance the crystallization temperature, glass transition temperature and crystallinity of polyamide-11 (PA11) nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Advanced Kolarik model for the modulus of a nanocomposite system reinforced by halloysite nanotubes and interphase zone

Zare

Rhee

2022

Polymer Composites

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In the current article, Kolarik model is progressed for the tensile modulus of a polymeric system containing dispersed halloysite nanotubes (HNT) and adjacent interphase section. The progressive model correlates the nanocomposite's modulus to HNT concentration (volume fraction and weight percentage), the extents of HNT and nearby interphase section in addition to the densities of polymer medium and HNT. The productions of the progressive model are linked to the tentative results and the influences of all variables on the modulus of system are justified. The modulus of system reduces as HNT radius increases, but HNT weight percentage directly controls the nanocomposite's modulus. The modulus of samples maximizes by 47% by the deepest interphase section of 20 nm establishing a straight link among nanocomposite's modulus and interphase thickness. The increment of polymer matrix density improves the modulus of samples, but there is an opposite relation between the modulus of system and HNT density.Furthermore, the calculations exactly match to the experimental facts of numerous examples representing the accurateness of the progressed model.

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“…Many researchers have stated that the mixture of HNTs with polymer media enhances the thermal and mechanical properties [41][42][43][44]. Prashantha et al [45] mixed neat HNT and quaternary ammonium salt-treated HNTs with polypropylene.…”

Section: Introductionmentioning

confidence: 99%

Tensile Modulus of Polymer Halloysite Nanotube Systems Containing Filler–Interphase Networks for Biomedical Requests

2022

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To date, there have been a limited number of studies modeling the tensile modulus in the polymer halloysite nanotube (HNT) systems before or after percolation onset. In this paper, an equation for a composite’s modulus post-percolation onset was developed for HNT-filled samples including the interphase and HNT network. The dispersed nanoparticles and adjoining interphase part were neglected, because they caused ineffective influences on the stiffness of the system after percolation onset. The developed model reflects the impacts of HNTs’ size, interphase depth, percolation onset and the volume shares and moduli of the HNT network and its adjacent interphase on the modulus of HNT-based systems. The impacts of issues on the nanocomposite modulus are defendable, confirming the effectiveness of the developed model. HNT length, interphase depth, HNT concentration, net modulus and net portion directly influenced the stiffness, while the HNT radius and percolation onset had inverse effects. Results show that there was a 142% improvement in the modulus of samples at an interphase depth of 40 nm. Moreover, the stiffness improved by 60% at a net modulus of 200 GPa, but it later exhibited a 180% enhancement at a net modulus of 1000 GPa. In addition, the experimental data for the modulus of numerous composites display fine agreement to the predictions, confirming the validity of the developed model.

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Preparation of polyurethane composites reinforced with halloysite and carbon nanotubes

Cited by 34 publications

References 49 publications

Thermoplastic polyurethane/multiwalled carbon nanotubes nanocomposites: Effect of nanoparticle content, shear, and thermal processing

Thermoplastic polyurethane/multiwalled carbon nanotubes nanocomposites: Effect of nanoparticle content, shear, and thermal processing

Advanced Kolarik model for the modulus of a nanocomposite system reinforced by halloysite nanotubes and interphase zone

Tensile Modulus of Polymer Halloysite Nanotube Systems Containing Filler–Interphase Networks for Biomedical Requests

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