Controlled Viscoelastic Carbon Nanotube Fluids

Lei, Yuchen; Xiong, Chuanxi; Guo, Hong; Yao, Junlong; Dong, Lijie; Su, Xiaohong

doi:10.1021/ja710014q

Cited by 46 publications

(30 citation statements)

References 16 publications

(40 reference statements)

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“…nano-particles, CNT) in a base fluid (nanofluid) has evolved over the past decade. The experiments have unveiled improvements in the rheological (Aladag et al 2012;Chen et al 2011;Jyothirmayee Aravind et al 2011;Lei et al 2008;Murshed et al 2008;Hobbie and Fry 2007;Vakili-nezhaad and Dorany 2009;Phuoc et al 2011;Liu et al 2005) as well as in the thermal (Ding et al 2006;Hwang et al 2006;Kalinina et al 2011;Ö zerinç et al 2010;Venkata Sastry et al 2008;Xie and Chen 2009;Kleinstreuer and Feng 2011;Choi et al 2001;Karthikeyan et al 2008;Xie et al 2002) properties of the nanofluid system, compared to its base fluid.…”

Section: Introductionmentioning

confidence: 99%

Thermal and rheological properties improvement of drilling fluids using functionalized carbon nanotubes

Fazelabdolabadi¹,

Khodadadi

Sedaghatzadeh

2014

Appl Nanosci

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The application of functionalized/unfunctionalized (multi-walled) carbon nanotubes (CNT) was investigated in the context of formulating nano-based drilling fluids from water/oil-based fluid templates. CNT functionalization was attempted by applying hydrophilic functional groups onto the surface of the nanotubes via acid treatment. Experimental data were collected for thermal conductivity, viscosity/yield point, and filtrate amount in all samples. The time evolution of thermal conductivity was studied, as well as the effects of temperature and CNTs volume fraction on the parameter. Scanning electron microscopy (SEM) was used to monitor CNTs dispersion quality. The thermal conductivity results unveil considerable enhancements, by as much as 23.2 % (1 % vol. functionalized CNT) in CNT-water-based case at ambient temperature, with extended improvement of 31.8 % at an elevated temperature of 50°C. Corresponding results for the CNT-oil-based case exhibit an improvement in thermal conductivity by 40.3 % (unfunctionalized) and 43.1 % (functionalized) and 1 % volume fraction of CNT. The rheological results follow an analogous improvement trend. For the CNT-oil-based case, the filtration tests conducted at 138°C and 500 (psi) show a 16.67 % reduction in filtrate amount (1 % vol. CNT). The time evolution of thermal conductivity was found to nearly equalize (at an amount of 9.7 %) after 100 h of sample preparation in both functionalized and unfunctionalized CNT-oil-based cases.

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Section: Introductionmentioning

confidence: 99%

Thermal and rheological properties improvement of drilling fluids using functionalized carbon nanotubes

Fazelabdolabadi¹,

Khodadadi

Sedaghatzadeh

2014

Appl Nanosci

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“…Polymer-inorganic hybrid particles with interesting nanostructures have been fabricated via a myriad of synthetic routes to impart desirable physical characteristics, including ferromagnetism 1 , 2 , self-assembly of particle chains 3 , ionic fluid flow, 4 and enhanced mechanical properties in nanocomposites 5,6,7 . One emerging fabrication route makes use of the assembly of colloidal building blocks to construct a more complex nanocomposite supracolloidal structure.…”

Section: Introductionmentioning

confidence: 99%

Soft polymer and nano-clay supracolloidal particles in adhesives: synergistic effects on mechanical properties

et al. 2009

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Numerous synthesis routes towards nanostructured polymer particles have emerged, but few examples demonstrate the essential need for such complex particle structures to achieve any added benefit in a target application. Here, polymer particles having Laponite-clay armor were prepared by the Pickering miniemulsion polymerization of n-lauryl acrylate. The resulting "softhard" poly(lauryl acrylate) (PLA)/Laponite hybrid particles were blended at varying low concentrations with a standard poly(butyl acrylate-co-acrylic acid) (PBA) latex for application as a waterborne pressure-sensitive adhesive (PSA). The tack adhesion properties of the resulting nanocomposite films were compared with the performance of the PBA when blended with either a conventional non-armored PLA latex, with Laponite RD nanosized clay discs, or a mixture of both. A true synergistic effect was discovered showing that the clay-armored supracolloidal structure of the hybrid particles was essential to achieve a superior balance of viscoelastic properties. The addition of small amounts, e.g. 2.7 wt.%, of the "soft-hard" clay-armored PLA particles increased the tack adhesion energy considerably more than found for the two individual components or for the sum of their individual contributions. The soft PLA core ensures that the adhesives are not stiffened too much by the nano-sized Laponite clay. Slippage at the interface between the nanoclay platelets and the PBA matrix introduces an additional energy dissipation mechanism during deformation. Through the synergistic effect of the clay and PLA in the supracolloidal armored latex structure, the tack adhesion energy is increased by 45 Jm -2 , which is about 70% greater than found for the PBA adhesive alone. IntroductionPolymer-inorganic hybrid particles with interesting nanostructures have been fabricated via a myriad of synthetic routes to impart desirable physical characteristics, including ferromagnetism 1 , 2 , self-assembly of particle chains 3 , ionic fluid flow, 4 and enhanced mechanical properties in nanocomposites 5,6,7 . One emerging fabrication route makes use of the assembly of colloidal building blocks to construct a more complex nanocomposite supracolloidal structure. The assembly process can be driven or guided by electrostatic forces, such as in heterocoagulation to prepare silica/polymer nanocomposite nanoparticles 8 .The process can also make use of confined geometries, e.g. droplets 9 , or a "particle lithography" approach, which -when coupled with electrostatic forces -leads to patchy structures 10 . A convenient and scalable method to fabricate polymer latexes armored with inorganic nanoparticles is to employ liquid-liquid interface-driven assembly and to combine it with (mini)emulsion polymerization techniques. 11,12,13 Although there has been a recent surge in fabrication methods for submicron-sized supracolloidal structures, examples in which profound changes in the bulk material properties can be directly ascribed to the nanostructured morphology of these complex colloidal partic...

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“…Compared with traditional nanofluids, novel self-suspended nanomaterials at room temperature through covalent graft a soft organic corona onto the nanomaterials surface have been proved to enhance the manipulation and impart compatibility of nanoparticles (Huang et al 2016;Li et al 2015;Lei et al 2008;Zheng et al 2016;Warren et al 2006). Organic corona generally refers to a surfaceactive agent, in which one end can tether nanoparticles and the other can further bond with polymers.…”

Section: Introductionmentioning

confidence: 99%

Abrasion properties of self-suspended hairy titanium dioxide nanomaterials

et al. 2017

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Considering the excellent solubility of pyrrolidone ring organic compounds, the synthesized N-(trimethoxysilyl) propyl-N-methyl-2-pyrrolidone chlorides was tethered onto titanium dioxide (TiO 2 ) nanoparticles to improve dispersion of TiO 2 , and then polyethylene oxide (PEO) oligomer through ion exchange embraced the tethered TiO 2 to obtain a novel self-suspended hairy TiO 2 nanomaterials without any solvent. A variety of techniques were carried out to illustrate the structure and properties of the self-suspended hairy TiO 2 nanomaterials. It was found that TiO 2 nanoparticles embody monodispersity in the hybrid system though the ''false reunion'' phenomenon occurring due to nonpermanent weak physical cross-linking. Remarkably, self-suspended hairy TiO 2 nanomaterials exhibit lower viscosity, facilitating maneuverable and outstanding antifriction and wear resistance properties, due to the synergistic lubricating effect between spontaneously forming lubricating film and nano-lubrication of TiO 2 cores, overcoming the deficiency of both solid and liquid lubricants. This make them promising candidates for the micro-electromechanic/nano-electromechanic systems (MEMS/NEMS).

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Controlled Viscoelastic Carbon Nanotube Fluids

Cited by 46 publications

References 16 publications

Thermal and rheological properties improvement of drilling fluids using functionalized carbon nanotubes

Thermal and rheological properties improvement of drilling fluids using functionalized carbon nanotubes

Soft polymer and nano-clay supracolloidal particles in adhesives: synergistic effects on mechanical properties

Abrasion properties of self-suspended hairy titanium dioxide nanomaterials

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