Highly exfoliated montmorillonite clay reinforced thermoplastic polyurethane elastomer:<i>in situ</i>preparation and efficient strengthening

Xu, Jia; Cheng, Lihua; Zhong, Zhang; Zhang, Ling; Xiong, Chengdong; Huang, Weishan; Xie, Yashui; Yang, Liping

doi:10.1039/c8ra10121c

Cited by 43 publications

(43 citation statements)

References 54 publications

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“…An increase in the amount of clay from 1 to 5 wt.% was reported to increase the thermal stability of the TPU matrix from 12 to 34 • C, respectively [52]. The increase in thermal stability with an increase for MMT in the TPU matrix has also been reported in previous studies [56]. The improvement in thermal stability of the clay-TPU nanocomposite was found to be directly connected to the degree of dispersion of the nanoclay in the TPU matrix [89].…”

Section: Thermal Properties Of Nanofiller-tpu Nanocompositessupporting

confidence: 76%

“…However, modulus and tensile strength are increased by 110 and 160%, respectively, for the nanocomposite containing 5 wt.% of Cloisite ® 30B. The reaction of the surface [-OH] group of the MMT with the isocyanate during in situ synthesis, which leads to an improvement in tensile strength, as well as elongation at break, has been observed from experimentation [56].…”

Section: Mechanical Properties Of Nanofiller-tpu Nanocompositesmentioning

confidence: 85%

“…It was seen that the morphology of clay platelets plays a crucial role in the improvement of the properties of the clay-TPU nanocomposites. The effect of hard segment content along with the amount of clay on the morphology has been discussed by Xu et al [56]. Increased hard segment content has been seen to result in an increase of the basal spacing of the clay platelets at a lower clay content.…”

Section: Morphology Properties Of Nanofiller-tpu Nanocompositesmentioning

confidence: 99%

“…It has been observed that the addition of nanoclay into the PU matrix improves the tensile properties to a significant degree [65]. As an example, adding 10 wt.% of modified clay increases the tensile strength, modulus, and strain at the break by more than 100% [45,56]. Young's modulus of the nanoclay-TPU nanocomposites has previously been seen to increase with the addition of modified nanoclays [66].…”

Section: Mechanical Properties Of Nanofiller-tpu Nanocompositesmentioning

confidence: 99%

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Investigating Physio-Thermo-Mechanical Properties of Polyurethane and Thermoplastics Nanocomposite in Various Applications

et al. 2021

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The effect of the soft and hard polyurethane (PU) segments caused by the hydrogen link in phase-separation kinetics was studied to investigate the morphological annealing of PU and thermoplastic polyurethane (TPU). The significance of the segmented PUs is to achieve enough stability for further applications in biomedical and environmental fields. In addition, other research focuses on widening the plastic features and adjusting the PU–polyimide ratio to create elastomer of the poly(urethane-imide). Regarding TPU- and PU-nanocomposite, numerous studies investigated the incorporation of inorganic nanofillers such as carbon or clay to incorporating TPU-nanocomposite in several applications. Additionally, the complete exfoliation was observed up to 5% and 3% of TPU–clay modified with 12 amino lauric acid and benzidine, respectively. PU-nanocomposite of 5 wt.% Cloisite®30B showed an increase in modulus and tensile strength by 110% and 160%, respectively. However, the nanocomposite PU-0.5 wt.% Carbone Nanotubes (CNTs) show an increase in the tensile modulus by 30% to 90% for blown and flat films, respectively. Coating PU influences stress-strain behavior because of the interaction between the soft segment and physical crosslinkers. The thermophysical properties of the TPU matrix have shown two glass transition temperatures (Tg’s) corresponding to the soft and the hard segment. Adding a small amount of tethered clay shifts Tg for both segments by 44 °C and 13 °C, respectively, while adding clay from 1 to 5 wt.% results in increasing the thermal stability of TPU composite from 12 to 34 °C, respectively. The differential scanning calorimetry (DSC) was used to investigate the phase structure of PU dispersion, showing an increase in thermal stability, solubility, and flexibility. Regarding the electrical properties, the maximum piezoresistivity (10 S/m) of 7.4 wt.% MWCNT was enhanced by 92.92%. The chemical structure of the PU–CNT composite has shown a degree of agglomeration under disruption of the sp2 carbon structure. However, with extended graphene loading to 5.7 wt.%, piezoresistivity could hit 10-1 S/m, less than 100 times that of PU. In addition to electrical properties, the acoustic behavior of MWCNT (0.35 wt.%)/SiO2 (0.2 wt.%)/PU has shown sound absorption of 80 dB compared to the PU foam sample. Other nanofillers, such as SiO2, TiO2, ZnO, Al2O3, were studied showing an improvement in the thermal stability of the polymer and enhancing scratch and abrasion resistance.

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Section: Thermal Properties Of Nanofiller-tpu Nanocompositessupporting

confidence: 76%

Section: Mechanical Properties Of Nanofiller-tpu Nanocompositesmentioning

confidence: 85%

Section: Morphology Properties Of Nanofiller-tpu Nanocompositesmentioning

confidence: 99%

Section: Mechanical Properties Of Nanofiller-tpu Nanocompositesmentioning

confidence: 99%

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Investigating Physio-Thermo-Mechanical Properties of Polyurethane and Thermoplastics Nanocomposite in Various Applications

et al. 2021

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“…However, there were no obvious diffraction peaks found for OMMT/HBPA at 2θ = 2-10°. From literature, it was observed that if the MMT was completely exfoliated into individual and collapsed silicate layers, the regular crystalline structure cannot be found from the XRD patterns ( Ji et al 2017;Osman et al 2017;Xu et al 2019a). From Figure 1a, it was observed that there were some small peaks at 25°, 32°, and 34°.…”

Section: Characterization Of Ommt/hbpa Emulsionmentioning

confidence: 97%

Enhancement of the physical and mechanical properties of wood using a novel organo-montmorillonite/hyperbranched polyacrylate emulsion

Ling

et al. 2020

Holzforschung

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In this work, a novel waterborne hyperbranched polyacrylate (HBPA) dispersed organo-montmorillonite (OMMT) emulsion was synthesized and used for the treatment of wood in a vacuum environment in order to enhance the physical and mechanical properties of the wood. The sapwood of Cathay poplar (Populus cathayana Rehd.) and Radiata pine (Pinus radiata D.Don) were used as the samples for experimentation. The results showed that the physical and mechanical properties of the wood improved significantly due to the successful penetration of the OMMT and HBPA into the wood cell wall. From it was also observed that OMET completely exfoliated from the HBPA matrix and formed a hydrophobic film covering on the inside walls of the cell lumen. Further, it was observed that the poplar sample displayed better mechanical properties than the pine sample because the pine has a more compact structure when compared to poplar and contains rosin. Furthermore, it was also observed that the mechanical properties of the modified wood sample gradually improved with an increase in the concentration of the emulsion. However, excessive concentration (>4 wt%) did not lead to further improvement.

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Performance evaluation on particle‐reinforced rigid/flexible composites via fused deposition modeling3Dprinting

Zhou

Yang

Liu

et al. 2022

J of Applied Polymer Sci

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The diversity of filament consumables is the basis for developing of fused deposition modeling (FDM) 3D printing industry. At the same time, the blending of matrix materials and the addition of reinforcing materials are the manufacturing difficulties of this composite 3D printing consumable. In this article, poly(lactic acid) (PLA)/thermoplastic polyurethane (TPU)/organic montmorillonite (OMMT) composites were manufactured to systematically study the characteristics and laws of these composites. Both the rigid matrix PLA and the flexible matrix TPU played advantages in multi-component composites, while the blended matrix balanced their characteristics. OMMT added with 5% wt not only improved the mechanical and thermal properties of matrix materials but also affected the processability and practicability of composite consumables. The distribution of OMMT particles in the composites was quantitatively analyzed through image processing technology. PLA/TPU/ OMMT FDM 3D printed samples as a representative composite system were selected to evaluate the general performance of particle-reinforced 3D printed composites, and to provide reference for the research and development based on this type of 3D printed products.

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Highly exfoliated montmorillonite clay reinforced thermoplastic polyurethane elastomer:in situpreparation and efficient strengthening

Abstract: Highly exfoliated montmorillonite (MMT) clay reinforced thermoplastic polyurethane elastomers (TPUs) were prepared by an in situ solution polymerization method.

Cited by 43 publications

References 54 publications

Investigating Physio-Thermo-Mechanical Properties of Polyurethane and Thermoplastics Nanocomposite in Various Applications

Investigating Physio-Thermo-Mechanical Properties of Polyurethane and Thermoplastics Nanocomposite in Various Applications

Enhancement of the physical and mechanical properties of wood using a novel organo-montmorillonite/hyperbranched polyacrylate emulsion

Performance evaluation on particle‐reinforced rigid/flexible composites via fused deposition modeling3Dprinting

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