Self-healing polyurethane/attapulgite nanocomposites based on disulfide bonds and shape memory effect

Xu, Yurun; Chen, Dajun

doi:10.1016/j.matchemphys.2017.04.007

Cited by 50 publications

(16 citation statements)

References 46 publications

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“…A series of PU/AT nanocomposites were prepared by solution blending by Xu and Chen. [22] They added 1 to 5% of AT to a self-healing PU based on disulfide bonds and shape memory effect. After a healing process of 4h at 80°C, all samples regained different levels of their original tensile strength.…”

Section: Introductionmentioning

confidence: 99%

Design of a new generation of sustainable SBR compounds with good trade-off between mechanical properties and self-healing ability

Santana

Huete

Lameda

et al. 2018

European Polymer Journal

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Self-healing polymers typically face an enforced trade-off between repairability and mechanical properties, with a high degree of self-healing being achieved mainly by materials having low mechanical strength and stiffness. This study focuses on the development of SBR compounds that can combine together self-healing properties with the use of ground tire rubber (GTR) as alternative sustainable filler. The self-healing efficiency of GTR filled SBR compounds is compared to conventional carbon black filled compounds. The influence of the vulcanization system and the addition of silane-based coupling agents are also assessed. Results show that SBR compounds vulcanized by means of a semi-efficient sulfur based system recover around 50% of their mechanical strength, being the self-healing response related to the presence of disulfide bonds. Contrary to carbon black compounds, GTR samples present similar healing efficiency to the unfilled SBR samples, improving mechanical properties in 50%. Moreover, the coupling agent enhances even more (up to 80%) the mechanical strength of the SBR-GTR compounds without adversely affecting the healing efficiency. These results can thus be seen as a starting model material for developing new sustainable applications economically and environmentally convenient with good mechanical properties as well as healing ability.

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Section: Introductionmentioning

confidence: 99%

Design of a new generation of sustainable SBR compounds with good trade-off between mechanical properties and self-healing ability

Santana

Huete

Lameda

et al. 2018

European Polymer Journal

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“…27 By studying the areas of the three deconvoluted regions as in equation (1), the interactions between the dispersed CDs and the TPU matrix were examined. 27 –31…”

Section: Resultsmentioning

confidence: 99%

High-performance thermoplastic polyurethane elastomer/carbon dots bulk nanocomposites with strong luminescence

Bai

Ren

Wang

et al. 2020

High Performance Polymers

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In this work, high-performance thermoplastic polyurethane elastomer/carbon dots (TPU/CDs) bulk nanocomposites with strong luminescence were fabricated via in situ polymerization. The CDs were synthesized from citric acid and 2-aminothiophenol. Transmission electron microscope, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and systematic characterization indicated the formation of the CDs and the covalent conjugation of the CDs with TPU. The optical properties of the TPU/CDs nanocomposites were characterized by ultraviolet–visible and fluorescence spectroscopy. Compared to the initial solid-state CDs (the absolute photoluminescence quantum yields (QY): 20%), all the composites exhibited stronger luminescence behavior. When the CDs content was 0.5 wt%, the QY was as high as 68%. Furthermore, the rheological, mechanical, and thermal properties of the nanocomposites were investigated. The rheological properties established the structure–property relationships of the composites. The incorporation of the CDs enhanced the elastic response in viscoelasticity of the nanocomposites. The tensile strength of 1.0 wt% CDs loaded TPU increased from 18.2 MPa to 28.6 MPa, nearly 57% higher than that of the neat TPU. Given the excellent Ag+ detection performance of the CDs, the high QY and the processability of the nanocomposites, Ag+ detection experiments for the composite film were performed. The study will facilitate the applications of luminescent nanocomposites in potential fields.

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“…With the merits of being lightweight, structurally versatile and having large recovery ability [11], SMPs exhibit tremendous advantages over shape memory alloys (SMAs) and shape memory ceramics (SMCs) [12,13]. These advantages provide SMPs with potential applications in aerospace [14], self-healing materials [15,16,17,18], intelligent textiles [19,20] and biomedical devices [21,22,23].…”

Section: Introductionmentioning

confidence: 99%

Shape Memory Behavior of Natural Eucommia ulmoides Gum and Low-Density Polyethylene Blends with Two Response Temperatures

Xia

Chen

et al. 2019

Polymers

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A series of shape memory blends of natural Eucommia ulmoides gum (EUG) and low-density polyethylene (LDPE) with a bicontinuous cross-linked structure were prepared by a physical blending method, which could be used in the field of thermal response with two different temperatures. We report the shape memory properties of these blended materials with two response temperatures for the first time. The mechanical, curing, thermal and shape memory properties of the blends were studied in this manuscript. Schematic diagrams are proposed to illustrate the dual shape memory behaviors of the EUG/LDPE blends. Our study focused on observing the relationship between the shape memory behavior and the microscopic crystalline phase states in the blends. In the blends, both the cross-linked network and the LDPE crystalline regions could act as fixed domains, while the crystalline regions of LDPE or EUG could act as the reversible domain. The shape memory properties were mainly determined by the components of the fixed and reversible domains. We focused on the shape memory behavior of blends at 60 °C and 130 °C in this manuscript. The results showed that when the peroxide dicumyl peroxide (DCP) dosage was 1.0 phr, the blends exhibited acceptable shape behavior at 60 °C (R1f = 74.8%, R1r = 63.3%). At the same time, when DCP dosage was 0.4 phr, the shape memory behavior of the blends at 130 °C was good and much better than that at 60 °C (R2f = 91.1%, R2r = 89.4%).

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Self-healing polyurethane/attapulgite nanocomposites based on disulfide bonds and shape memory effect

Cited by 50 publications

References 46 publications

Design of a new generation of sustainable SBR compounds with good trade-off between mechanical properties and self-healing ability

Design of a new generation of sustainable SBR compounds with good trade-off between mechanical properties and self-healing ability

High-performance thermoplastic polyurethane elastomer/carbon dots bulk nanocomposites with strong luminescence

Shape Memory Behavior of Natural Eucommia ulmoides Gum and Low-Density Polyethylene Blends with Two Response Temperatures

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