Ultralow percolation graphene/polyurethane acrylate nanocomposites

Liao, Kuo‐Wei; Qian, Yuqiang; Macosko, Christopher W.

doi:10.1016/j.polymer.2012.06.020

Cited by 69 publications

(39 citation statements)

References 29 publications

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“…However, storage modulus at rubbery state does not change sensibly in presence of CNT‐HEMA. This observation is different from graphene filled APU nanocomposite reported by Liao et al who observed greater improvement of mechanical properties at rubbery state. They attributed such behavior to considerably lower elastic modulus of matrix at rubbery state, so the influence of graphene on the improvement of elastic modulus was more sensible compared with glassy state.…”

Section: Resultscontrasting

confidence: 99%

In situ preparation and characterization of biocompatible acrylate‐terminated polyurethane containing chemically modified multiwalled carbon nanotube

Alishiri

Shojaei

2017

Polymer Composites

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Biodegradable acrylate‐terminated polyurethane/acrylate (APUA) filled with 2‐hydroxyethyl methacrylate functionalized carbon nanotube (CNT‐HEMA) was prepared by in situ free radical crosslinking. CNT‐HEMA enhanced crystallinity of soft domain and caused more phase separation between hard and soft domains of APUA. Tensile testing showed a considerable improvement in elastic modulus (∼160%) and tensile strength (∼30%) at 1 wt% loading. Morphological features of APUA induced by nanotubes were found to be dominant on mechanical properties of APUA/CNT‐HEMA. CNT‐HEMA increased water contact angle of APUA; however, wettability of APUA/CNT‐HEMA maintained in acceptable range for biomedical applications. APUA/CNT‐HEMA exhibited lower hydrophobic nature compared to many CNT filled polyurethanes reported in literature due to HEMA functional group, making APUA/CNT‐HEMA nanocomposites adequate for biomedical applications. POLYM. COMPOS., 39:E297–E307, 2018. © 2017 Society of Plastics Engineers

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Section: Resultscontrasting

confidence: 99%

In situ preparation and characterization of biocompatible acrylate‐terminated polyurethane containing chemically modified multiwalled carbon nanotube

Alishiri

Shojaei

2017

Polymer Composites

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“…The improvement arises from the combination of two conducting fillers with unique geometric shapes and aspect ratios as well as different dispersion characteristics . It is well known that 0‐D CB and 2‐D GNPs are typical nanostructured carbon conductive fillers used in the polymer matrix . In this article, GNPs and CB were used to prepare the conductive polymer composites to show how would the fillers affect the conductivity of the composite if a small amount of GNPs is added into the CB composite and why the piezoresistive property of mixed better than CB.…”

Section: Introductionmentioning

confidence: 99%

“…21 It is well known that 0-D CB and 2-D GNPs are typical nanostructured carbon conductive fillers used in the polymer matrix. 22 In this article, GNPs and CB were used to prepare the conductive polymer composites to show how would the fillers affect the conductivity of the composite if a small amount of GNPs is added into the CB composite and why the piezoresistive property of mixed better than CB. The difference of conductivity and piezoresistive property between CB/SR and CB/GNPs/SR was investigated in detail.…”

Section: Introductionmentioning

confidence: 99%

Piezoresistive behavior of graphene nanoplatelets/carbon black/silicone rubber nanocomposite

Cai

Huang

Wang

et al. 2013

J of Applied Polymer Sci

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Silicon rubber (SR) filled with carbon black (CB) and carbon black (CB)/graphene nanoplatelets (GNPs) hybrid fillers are synthesized via a liquid mixing method. The effects of filler type on the electrical properties and piezoresistive properties (near the region of the percolation) of the conductive SR composites are studied. It is suggested that the conductivity of the composite filled with CB/GNPs hybrid fillers in the mass ratio of 2 : 4 is much higher than that in other ratio. Percolation threshold for CB/GNPs/SR is found to be 0.18 volume fractions lower than CB/SR. Moreover, force rang and linearity of GNPs/CB/SR is higher than CB alone filling system. And the repeatability of the GNPs/CB/SR composites is better than CB/SR. Not repetitive index (ez) of them is 0.1 and 0.18, respectively. The results suggest that the GNPs/CB/SR composites provide a new route toward fabrication of flexible piezoresistive sensors with high performance. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 39778.

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“…Mori–Tanaka model has also been employed to estimate the ratio of graphene sheets basing on the above modulus results (Supporting Information Fig. ) …”

Section: Resultsmentioning

confidence: 99%

Reactive copolymer functionalized graphene sheet for enhanced mechanical and thermal properties of epoxy composites

Luo

Chen

et al. 2015

J. Polym. Sci., Part A: Polym. Chem.

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Uniform dispersion of graphene nanosheets (GNS) in a polymer matrix with strong filler–matrix interfacial interaction, preserving intrinsic material properties of GNS, is the critical factor for application of GNS in polymer composites. In this work, a novel reactive copolymer VCz–GMA containing carbazole and epoxide group was designed, synthesized and employed to noncovalently functionalize GNS for preparing epoxy nanocomposites with enhanced mechanical properties. The presence of carbazole groups in VCz–GMA enables the tight absorption of copolymer on to graphene surface via π–π stacking interaction, as evidenced by Raman and fluorescence spectroscopy, whereas the epoxide segments chemically reacts with the epoxy matrix, improving the compatibility and interaction of graphene with epoxy matrix. As a result, the VCz–GMA–GNS/epoxy composite showed a remarkable enhancement in both mechanical and thermal property than either the pure epoxy or the graphene/epoxy composites. The incorporation of 0.35 wt % VCz–GMA–GNS yields a tensile strength of 55.72 MPa and elongation at break of 3.45, which are 42 and 191% higher than the value of pure epoxy, respectively. Increased glass transition temperature and thermal stability of the epoxy composites were also observed. In addition, a significant enhancement in thermal conductivity was achieved with only 1 wt % VCz–GMA–GNS loading. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2015, 53, 2776–2785

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Ultralow percolation graphene/polyurethane acrylate nanocomposites

Cited by 69 publications

References 29 publications

In situ preparation and characterization of biocompatible acrylate‐terminated polyurethane containing chemically modified multiwalled carbon nanotube

In situ preparation and characterization of biocompatible acrylate‐terminated polyurethane containing chemically modified multiwalled carbon nanotube

Piezoresistive behavior of graphene nanoplatelets/carbon black/silicone rubber nanocomposite

Reactive copolymer functionalized graphene sheet for enhanced mechanical and thermal properties of epoxy composites

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