Facile fabrication of ternary nanocomposites with selective dispersion of multi-walled carbon nanotubes to access multi-stimuli-responsive shape-memory effects

He, Man-Jie; Xiao, Wen-Xia; Xie, Hui; Fan, Cheng-Jie; Du, Lan; Deng, Xiaoying; Yang, Ke‐Ke; Wang, Yu‐Zhong

doi:10.1039/c6qm00047a

Cited by 26 publications

(13 citation statements)

References 54 publications

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“…For comparison, the conductivity of PBS/MWCNTs was evaluated as 9.79·10 -5 S·cm -1 , which is lower than that of PBS/ PCL/MWCNTs. The authors suggested that this could be proof of the selective dispersion of MWCNTs in the PBS domain [92].…”

Section: Conductivitymentioning

confidence: 98%

“…The addition of rigid materials such as carbon nanotubes normally improves the modulus of flexible polymers at the expense of its ductility. He et al [92] reported on the tensile properties of multiblock PBS/PCL copolymers and their nanocomposites, and found a good compromise between strength and flexibility. The authors reported an increase in the elongation at break for the multiblock PBS/PCL copolymers with an increase in PCL content, which resulted in a high ductility.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…There is currently only one research paper available on PBS/PCL/CNTs nanocomposites [92]. The authors introduced MWCNTs into double-crystalline multiblock PBS/PCL copolymers using solution mixing and solvent casting processes.…”

Section: Pbs/pcl/cnts Nanocomposites 61 Morphologymentioning

confidence: 99%

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Review on PCL, PBS, and PCL/PBS blends containing carbon nanotubes

Gumede¹,

Luyt²,

Müller³

2018

Express Polym. Lett.

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Abstract. Biodegradable polymers received considerable attention due to their contribution in the reduction of environmental concerns and the realization that global petroleum resources are finite. The development of double crystalline biobased blends such as poly(ε-caprolactone) (PCL) and poly(butylene succinate) (PBS) are particularly interesting because each component has an influence on the crystallization behaviour of the other component, and thus influences the strength and mechanical properties of a polymer blend. The lack of miscibility between PCL and PBS constitutes a bottleneck, and efforts have been made to improve the miscibility through the inclusion of copolymers. Having realized that incorporating conductive nanofillers such as carbon nanotubes (CNTs), (especially when the CNTs are functionalized or used as a masterbatch i.e., polycarbonate/MWCNTs masterbatch), into biopolymer matrices, can enhance the thermal and mechanical properties, as well as electrical and thermal conductivity, a lot of research was aimed at the production of bionanocomposites. This review paper discusses the properties of PCL, PBS, their blends, and their CNTs containing nanocomposites.

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Section: Conductivitymentioning

confidence: 98%

Section: Mechanical Propertiesmentioning

confidence: 99%

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Review on PCL, PBS, and PCL/PBS blends containing carbon nanotubes

Gumede¹,

Luyt²,

Müller³

2018

Express Polym. Lett.

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“…As is commonly known, polyurethanes (PUs) are a typical class of polymers with hard/soft two-phase morphology. PUs show great diversity in terms of both performance and morphology because they can be synthesized from various diols or polyols as well as isocyanate [42][43][44][45]. Moreover, PU architecture can be simply tuned by selecting suitable chain extenders and end-groups [46].…”

Section: Introductionmentioning

confidence: 99%

A robust self-healing polyurethane elastomer: From H-bonds and stacking interactions to well-defined microphase morphology

Fan

Huang

et al. 2019

Sci. China Mater.

Self Cite

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Self-healing materials have attracted considerable attention because of their improved safety, lifetime, energy efficiency and environmental impact. Supramolecular interactions have been extensively considered in the field of self-healing materials due to their excellent reversibility and sensitive responsiveness to environmental stimuli. However, development of a polymeric material with good mechanical performance as well as self-healing capacity is very challenging. In this study, we report a robust self-healing polyurethane (PU) elastomer polypropylene glycol-2-amino-5-(2hydroxyethyl)-6-methylpyrimidin-4-ol (PPG-mUPy) by integrating ureidopyrimidone (UPy) motifs with a PPG segment with a well-defined architecture and microphase morphology. To balance the self-healing capacity and mechanical performance, a thermal-triggered switch of H-bonding is introduced. The quadruple H-bonded UPy dimeric moieties in the backbone induce phase separation to form a hard domain as well as enable further aggregation into microcrystals by virtue of the stacking interactions, which are stable in ambient temperature. This feature endows the PU with high mechanical strength. Meanwhile, a high healing efficiency can be realized, when the reversibility of the H-bond was unlocked from the stacking at higher temperature. An optimized sample PPG 1000-mUPy 50% with a good balance of mechanical performance (20.62 MPa of tensile strength) and healing efficiency (93% in tensile strength) was achieved. This strategy will provide a new idea for developing robust self-healing polymers.

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“…Recent reports [11,12,13] revealed that adding conductive carbon-based nano-fillers such as carbon nanotubes (CNTs) into PCL and PBS matrices can enhance some of the matrix properties to better levels than those of the copolymers or polymers filled with metal powders, as well as produce electrically conductive materials with better mechanical properties. This is due to their low density, inertness and better compatibility than metal powders with most polymers.…”

Section: Introductionmentioning

confidence: 99%

Isothermal Crystallization Kinetics and Morphology of Double Crystalline PCL/PBS Blends Mixed with a Polycarbonate/MWCNTs Masterbatch

et al. 2019

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In this work, the 70/30 and 30/70 w/w polycaprolactone (PCL)/polybutylene succinate (PBS) blends and their corresponding PCL/PBS/(polycarbonate (PC)/multiwalled carbon nanotubes (MWCNTs) masterbatch) nanocomposites were prepared in a twin-screw extruder. The nanocomposites contained 1.0 and 4.0 wt% MWCNTs. The blends showed a sea-island morphology typical of immiscible blends. For the nanocomposites, three phases were formed: (i) The matrix (either PCL- or PBS-rich phase depending on the composition), (ii) dispersed polymer droplets of small size (either PCL- or PBS-rich phase depending on the composition), and (iii) dispersed aggregates of tens of micron sizes identified as PC/MWCNTs masterbatch. Atomic force microscopy (AFM) results showed that although most MWCNTs were located in the PC dispersed phase, some of them migrated to the polymer matrix. This is due to the partial miscibility and intimate contact at the interfaces between blend components. Non-isothermal differential scanning calorimetry (DSC) scans for the PCL/PBS blends showed an increase in the crystallization temperature (Tc) of the PCL-rich phase indicating a nucleation effect caused by the PBS-rich phase. For the nanocomposites, there was a decrease in Tc values. This was attributed to a competition between two effects: (1) The partial miscibility of the PC-rich and the PCL-rich and PBS-rich phases, and (2) the nucleation effect of the MWCNTs. The decrease in Tc values indicated that miscibility was the dominating effect. Isothermal crystallization results showed that the nanocomposites crystallized slower than the neat blends and the homopolymers. The introduction of the masterbatch generally increased the thermal conductivity of the blend nanocomposites and affected the mechanical properties.

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Facile fabrication of ternary nanocomposites with selective dispersion of multi-walled carbon nanotubes to access multi-stimuli-responsive shape-memory effects

Abstract: A multi-stimuli-responsive shape-memory ternary nanocomposites with selective dispersion of MWCNTs was developed by introducing MWCNTs into a PBS-PCL multiblock copolymer matrix (PBSPCL) by a facile approach.

Cited by 26 publications

References 54 publications

Review on PCL, PBS, and PCL/PBS blends containing carbon nanotubes

Review on PCL, PBS, and PCL/PBS blends containing carbon nanotubes

A robust self-healing polyurethane elastomer: From H-bonds and stacking interactions to well-defined microphase morphology

Isothermal Crystallization Kinetics and Morphology of Double Crystalline PCL/PBS Blends Mixed with a Polycarbonate/MWCNTs Masterbatch

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