Preparation of intelligent magnetic halloysite nanotubes/polyurethane nanocomposites: The role of nanotube modification on the shape recovery rate

Mohammadzadeh, Fatemeh; Haddadi‐Asl, Vahid; Siavoshani, Asal Yousefi; Salami‐Kalajahi, Mehdi

doi:10.1016/j.materresbull.2021.111653

Cited by 14 publications

(13 citation statements)

References 62 publications

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“…The Al−OH stretching vibrations were attributed to the bands at 3695 and 3619 cm −1 , while water's O−H stretching was responsible for the absorption band at 3455 cm −1 . 12,33 At roughly 1034 cm −1 , the O−Si−O absorption band was found. 34 The interlayer water was recognized by the bending vibration band at 1639 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

“…Halloysite nanoclay (HNC), also known as Al 2 Si 2 O 5 (OH) 4 •2H 2 O, is a common source of natural nanoparticles . It is a two-layered (1:1) aluminosilicate separated by a layer of water molecules .…”

Section: Introductionmentioning

confidence: 99%

“…10,11 H a l l o y s i t e n a n o c l a y ( H N C ) , a l s o k n o w n a s Al 2 Si 2 O 5 (OH) 4 •2H 2 O, is a common source of natural nanoparticles. 12 It is a two-layered (1:1) aluminosilicate separated by a layer of water molecules. 13 HNC has a high level of biocompatibility, low cost, and thermal stability, making them an excellent choice for use in polymer matrixes.…”

Section: Introductionmentioning

confidence: 99%

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Halloysite-Decorated Mechanically Robust Polyurethane Nanocomposite Foams for Acoustic Relevance

Maamoun

Elkhateeb

Zulfiqar

2022

Ind. Eng. Chem. Res.

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Noise pollution affects human health and the environment. In this study, halloysite nanoclay (HNC) was employed as a bio-nanofiller with different ratios (1−5 wt %) to improve the thermal, mechanical, and sound absorption capabilities of the flexible polyurethane (FPU) foam. FPU/HNC composites were characterized using X-ray diffraction, Fourier transform infrared, and field emission scanning electron microscopy techniques. In addition, porosity, apparent density, and sol fraction for FPU/HNC composites were investigated. Compared with the unfilled FPU foam, the results of the FPU/HNC 1% sample showed that the density achieved a maximum value of 38.17 Kg/m 3 , while the porosity was reduced to 83.48%. Moreover, the sol fraction reached the highest value of 13.4% for the FPU/HNC 5% sample. Furthermore, thermogravimetric analysis revealed that adding 1 wt % HNC improved thermal stability than the unfilled FPU. Nevertheless, the DSC measurement proved that HNC increased the glass transition temperature (T g ) for the composites' soft segments. Intriguingly, the mechanical measurements exposed that the compressive and tensile strength of the FPU/HNC 1% sample was enhanced to 158.93 and 154.45%; at the same time, the elongation at break dropped to 124.04%. Nevertheless, the sound absorption measurements (20 mm thickness) showed a slight shift to the mid-frequency range (315−1600 Hz) for FPU/HNC composites than the unfilled FPU.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Halloysite-Decorated Mechanically Robust Polyurethane Nanocomposite Foams for Acoustic Relevance

Maamoun

Elkhateeb

Zulfiqar

2022

Ind. Eng. Chem. Res.

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“…These magnetically modified HNTs were then used to create thermoplastic polyurethane nanocomposites with shape memory properties, and results showed that the shape memory properties were significantly improved by the addition of the modified HNTs with best results seen in nanocomposites containing 2 wt % of the modified HNTs. The maximum shape stability and recovery rate achieved were 96.7% and 179.1 GPa °C –1 , respectively …”

Section: Introductionmentioning

confidence: 99%

Halloysite-Based Magnetic Nanostructures for Diverse Applications: A Review

Kumar

Gupta

2023

ACS Appl. Nano Mater.

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Halloysite nanotubes (HNTs) have emerged as one of the promising clay minerals that have myriad applications due to their unique properties. The presence of silica and alumina groups on the outer and inner surfaces allows surface modifications with different functional compounds. Depending on the applications required, numerous desired compounds have been used for both inner and outer surface modifications to construct hybrid noanostructures which further enhance their physiochemical properties. This review discusses the surface design with special emphasis on magnetic nanoparticles to fabricate HNT-based magnetic nanostructures which display synergistic effects and summarizes potential applications in the fields of catalysis, magnetically driven drug delivery, chemotherapy/diagnosis, environmental remediation, emulsification, and microwave absorption.

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“…A distinctive polymer is a complex combination of several long, intertwined molecular chains linked by distinctive net sites formed by either chemical or physical crosslinking. The polymer chains relax and become more flexible at temperatures above the glass transition temperature (T g ) and as a result, the polymer softens and becomes rubbery [5,6]. Once a force is applied to the polymer chains, they may be elongated or constricted to great lengths, and the remaining points can also be relocated.…”

Section: Introductionmentioning

confidence: 99%

Experimental Studies on Fabrication and Thermal Characterization of Shape Memory Polymer Composites with Nanofillers

Alshgari

Wabaidur

Parthasarathy

et al. 2022

Journal of Nanomaterials

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Shape memory polymers (SMP) have piqued the interest of the research and development sector due to their new features and immense potential. The polymer matrix epoxy was changed using varied weight percentages of aliphatic monomer-neopentyl glycol diglycidyl ether (NGDE), and the optimal weight percentage of NGDE was identified. The weight percentages of NGDE-CNT are 0, 0.3, 0.6, 0.9, 1.2, and 1.5. The use of nanofillers such as carbon nanotubes (CNT) has been promoted to improve the heat conductivity of composites. The thermal conductivity of shape memory polymers has been enhanced through the addition of varying quantities of CNT filler. Mechanical characterizations such as tensile testing, Young’s modulus, impact strength, and heat related tests such as form recovery testing, shape fixity, and recovery time were also investigated. From the investigational outcomes, optimal weight percentage of NGDE loading into epoxy is 15%, and maximum tensile strength attains at 1.2 wt. percent of CNT.

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Preparation of intelligent magnetic halloysite nanotubes/polyurethane nanocomposites: The role of nanotube modification on the shape recovery rate

Cited by 14 publications

References 62 publications

Halloysite-Decorated Mechanically Robust Polyurethane Nanocomposite Foams for Acoustic Relevance

Halloysite-Decorated Mechanically Robust Polyurethane Nanocomposite Foams for Acoustic Relevance

Halloysite-Based Magnetic Nanostructures for Diverse Applications: A Review

Experimental Studies on Fabrication and Thermal Characterization of Shape Memory Polymer Composites with Nanofillers

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