Triggering compatibility and dispersion by selective plasma functionalized carbon nanotubes to fabricate tough and enhanced Nylon 12 composites

Roy, Sunanda; Das, Tamal; Zhang, Ling; Li, Yongmei; Yin, Ming; Sun, Ting; Hu, Xiao; Yue, Chee Yoon

doi:10.1016/j.polymer.2014.12.032

Cited by 24 publications

(19 citation statements)

References 38 publications

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“…The enhancements in these properties can be achieved at relatively low loadings, which arises from their high aspect ratio, leading to them frequently being superior fillers compared to the conventional micrometer-sized fillers [7]. However, the property improvements achieved to date using carbon nanofillers are still well below the theoretical predictions due to the difficulty in achieving (i) a uniform dispersion of the nanofillers in the polymer matrices, (ii) appropriate interfacial bonding with the polymer matrices [3,5,8], and more importantly, (iii) alignment of the nanofillers. Indeed, aligned carbon nanofillers have been found to produce more significant improvements in the mechanical and electrical properties, in the direction of the alignment, when compared to their randomly-oriented counterparts [9e13].…”

Section: Introductionmentioning

confidence: 99%

Epoxy nanocomposites containing magnetite-carbon nanofibers aligned using a weak magnetic field

Ladani

Zhang

et al. 2015

Polymer

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a b s t r a c tNovel magnetite-carbon nanofiber hybrids (denoted by "Fe 3 O 4 @CNFs") have been developed by coating carbon nanofibers (CNFs) with magnetite nanoparticles in order to align CNFs in epoxy using a relatively weak magnetic field. Experimental results have shown that a weak magnetic field (~50 mT) can align these newly-developed nanofiber hybrids to form a chain-like structure in the epoxy resin. Upon curing, the epoxy nanocomposites containing the aligned Fe 3 O 4 @CNFs show (i) greatly improved electrical conductivity in the alignment direction and (ii) significantly higher fracture toughness when the Fe 3 O 4 @CNFs are aligned normal to the crack surface, compared to the nanocomposites containing randomly-oriented Fe 3 O 4 @CNFs. The mechanisms underpinning the significant improvements in the fracture toughness have been identified, including interfacial debonding, pull-out, crack bridging and rupture of the Fe 3 O 4 @CNFs, and plastic void growth in the polymer matrix.

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Section: Introductionmentioning

confidence: 99%

Epoxy nanocomposites containing magnetite-carbon nanofibers aligned using a weak magnetic field

Ladani

Zhang

et al. 2015

Polymer

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“…130%. It should be noticed however, that in our case the tests were performed on injection molded bulk samples, whilst Roy's composites had a form of films, what explains different shapes of stress-strain curves, and significantly higher E modulus values of our PA/NC materials (actually the E values were the highest if compared to the results reported in [57,60]). At the same time the thermal and structural parameters of two kinds of composites are similar, what brings another evidence, that in our study the composite performance results from inter-molecular interactions between filler and polymer matrix improved by CNT surface functionalization.…”

Section: The Effect Of Carbon Nanotube Functinalization On Performancmentioning

confidence: 63%

“…It is also beneficial for PA12/CNT composites by improving their mechanical performance and thermo-oxidative stability. For comparison Roy et al [60] used multi-walled carbon nanotubes modified by radiofrequency oxygen plus plasma treatment, which is considered as much less destructive and harmful for graphitic structure, to prepare PA12 composites by melt mixing. Considering the mechanical parameters for composites containing a comparable CNT content (0.35 versus 0.4 wt % of plasma treated nanotubes) the materials investigated in this study reveal slightly better effects of improvement, i.e., maximum increase of stress up to 26% versus ca.…”

Section: The Effect Of Carbon Nanotube Functinalization On Performancmentioning

confidence: 99%

Different Approaches to Oxygen Functionalization of Multi-Walled Carbon Nanotubes and Their Effect on Mechanical and Thermal Properties of Polyamide 12 Based Composites

et al. 2020

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In this work the preparation of polyamide 12 (PA12) based composites reinforced with pristine and surface-modified carbon nanotubes is reported. A qualitative and quantitative evaluation of multi-walled carbon nanotube functionalization with oxygen containing reactive groups achieved by different procedures of chemical treatment is presented. Simple strong oxidative acid treatment as well as chlorination with subsequent chloroacetic acid treatment were applied. Carbon nanotubes (CNTs) were also subjected to chlorine and ammonia in gaseous atmosphere with small differences in after-ammonia treatment. Commercial COOH-functionalized carbon nanotubes were compared with nanotubes that were laboratory modified. The effect of CNT functionalization was evaluated basing on the improvement of mechanical and thermal properties of polyamide 12 composites prepared by in situ polymerization. It was found that high concentration of oxygen-containing functional groups on nanotube surface is not sufficient to improve the composite performance if the structure of carbon nanotubes is defective. Indeed, the best effects were achieved for composites containing nanotubes modified under mild conditions, seemingly due to a compromise between morphology and surface chemical structure.

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“…On the other hand, the surface fractures of the HNR025/CMS with CMS loading at 50 and 60 phr [Figure (g,h)] were found to be lower rough surface due to agglomeration of CMS in HNR025 matrix. Well dispersion and distribution of CMS in rubber matrix were believed to be enhanced by the compatibility between CMS and HNR …”

Section: Results and Disscusionmentioning

confidence: 99%

Self‐crosslinkable hydroxylated natural rubber/carboxymethyl starch blend and its properties

Chooprayoon

Boochathum

2018

J of Applied Polymer Sci

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Self‐crosslinkable hydroxylated natural rubber (HNR) and carboxymethyl starch (CMS) was successfully prepared via in situ mixing of CMS slurry in HNR latex. The purpose of this work was to study the crosslinking of HNR using CMS as a novel crosslinker in order to reduce the use of sulfur vulcanizing agent and other toxic chemicals such as accelerator. Two systems with different HNR:formic acid:hydrogen peroxide ratios were prepared: 1:0.25:0.25, designated as HNR025, and 1:0.35:0.35, designated as HNR035. Well dispersion and distribution of CMS in the HNR025 matrix were obvious as imaged in scanning electron microscope micrographs. The resulting interfacial combination and ester bonding between HNR and CMS molecules were believed to enhance the mechanical properties and thermal stability of the HNR/CMS blends. It was remarkable that the determined crosslink densities of the HNR/CMS blends increased with the CMS loading and were corresponding to the improved mechanical properties. This self‐crosslinkable blend between HNR and CMS without using any vulcanizing agents would be of interest for the preparation of the green biodegradable rubber products in the future. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47271.

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Triggering compatibility and dispersion by selective plasma functionalized carbon nanotubes to fabricate tough and enhanced Nylon 12 composites

Cited by 24 publications

References 38 publications

Epoxy nanocomposites containing magnetite-carbon nanofibers aligned using a weak magnetic field

Epoxy nanocomposites containing magnetite-carbon nanofibers aligned using a weak magnetic field

Different Approaches to Oxygen Functionalization of Multi-Walled Carbon Nanotubes and Their Effect on Mechanical and Thermal Properties of Polyamide 12 Based Composites

Self‐crosslinkable hydroxylated natural rubber/carboxymethyl starch blend and its properties

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