Engineering the surface of carbon-based nanomaterials for dispersion control in organic solvents or polymer matrices

Oliveira, Thais Cardoso de; Ferreira, Filipe V.; Menezes, Beatriz Rossi Canuto de; Silva, Diego Morais da; Santos, Alan Silva dos; Kawachi, Elizabete Yoshie; Simonetti, Evelyn Alves Nunes; Cividanes, Luciana De Simone

doi:10.1016/j.surfin.2021.101121

Cited by 15 publications

(4 citation statements)

References 60 publications

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“…CNTs have exhibited proficient adsorption capabilities for removal and separation of contaminants. The modification and functionalization of CNTs can enhance the hydrophilicity, mechanical strength, and bacterial inhibitory capabilities of membranes (de Oliveira et al, 2021; Kang et al, 2008).…”

Section: Cnts Types and Propertiesmentioning

confidence: 99%

Role of carbon nanotubes in remediation of pharmaceutical wastewater

Bhayana,

Dandekar,

Bala

et al. 2024

Remediation Journal

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The discharge of wastewater from the pharmaceutical industry poses risks of detrimental effects on various ecosystems. The presence of hazardous substances in pharmaceutical wastewater is a matter of global concern due to its association with multiple disorders, including disruptions in endocrine hormones and significant chronic toxicity. As research in this field continues to grow, the valorization to nanotechnology‐based treatment of industrial wastewater approaches. One prominent focus of recent research is the utilization of nanomaterials, particularly carbon nanotubes (CNTs), in treating pharmaceutical wastewater, aligns with the goals of sustainable development. CNTs demonstrate potential in efficiently mineralizing pharmaceutical compounds in wastewater, offering cost‐effectiveness, ease of handling, and efficacy. Additionally, CNTs possess the capability to remediate pharmaceutical wastewater at a relatively low cost, with the advantage of being recyclable. This review provides an overview of the diverse applications of various CNTs for the removal of pharmaceutical compounds from wastewater, emphasizing the mechanisms of adsorption and degradation of these compounds using CNTs. Furthermore, it sheds light on the application of CNTs in photocatalysis as an economically viable and efficient solution.

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Section: Cnts Types and Propertiesmentioning

confidence: 99%

Role of carbon nanotubes in remediation of pharmaceutical wastewater

Bhayana,

Dandekar,

Bala

et al. 2024

Remediation Journal

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“…Generally, CNT dispersion methods are classified into mechanical dispersion and chemical functionalization methods. A typical mechanical dispersion was carried out by ultrasonication technique, while the chemical functionalization method introduces new hydrophilic chemical groups which are chemically bonded , or physically adsorbed to CNTs or wrapped around CNTs . Lucas et al reported that homogeneous CNT dispersion was achieved by a sonication technique with high power for a long time .…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotube Yarns Tailored Using Dispersants and Surfactants for Flexible and Wearable Thermoelectric Generators

Nguyen,

Okamoto,

Abe

et al. 2024

ACS Appl. Nano Mater.

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Carbon nanotube (CNT) yarns have emerged as a promising candidate for flexible and fabric-type wearable thermoelectric devices. This study developed CNT yarns tailored by a low-cost, fast, and environmentally friendly CNT dispersion method using glycerol as a dispersant and polyoxyethylene(50) stearyl ether as a surfactant. A high power factor of 242 μW m −1 K −2 was obtained, which is ca. three times higher than that of the previous dispersion method. The significant contribution is the 2-fold increase of electrical conductivity (from 325 to 747 S cm −1 ), which originates from the higher degree of disentanglement in dispersion and better CNT alignment in the yarn. Another contribution is the suppression of the increase in thermal conductivity as a possible side effect of the CNT alignment, which is concluded to be due to the surfactant adsorbed on CNT bundles. As a result, the figure of merit ZT value was successfully improved by ca. a factor of 3.

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“…To improve the conductivity of hydrogel for flexible sensors, filled hydrogels can be prepared with a variety of fillers , to boost the conductivity of hydrogel, such as metal fillers − (e.g., nanowires or micro/nanoparticles), carbon-based conductive materials , (carbon nanotubes or graphene), and intrinsically conductive polymers , (e.g., poly(3,4-ethylenedioxythiophene) polystyrenesulfonate or polyaniline). In particular, the addition of nanoconductive fillers to hydrogels is a very promising strategy to improve electrical conductivity , and mechanical properties. , Among many nanofillers, MXene nanosheets are not only highly conductive and can also be uniformly dispersed in hydrogels due to the abundant hydrophilic groups on their surface such as −OH, –F, and O. − This results in the cross-linking of MXene nanosheets with polymer chains, thereby improving the conductivity and mechanical properties of the hydrogel. Although Mxene-based hydrogels have excellent tensile properties (>1000%), − their poor strength (<100 kPa) makes their elastic modulus incompatible with human tissue (1–100 kPa). , This greatly limits the practical application of hydrogels for flexible electronic skin and other interfacial sensing. , Therefore, it remains a considerable challenge to construct MXene-based hydrogels with excellent conductivity, high strength, and elastic modulus suitable for human tissues.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Mechanical Strength of Metal Ion-Doped MXene-Based Double-Network Hydrogels for Highly Sensitive and Durable Flexible Sensors

Yang,

Li,

Chen

et al. 2023

ACS Appl. Mater. Interfaces

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Development of conductive hydrogels with high sensitivity and excellent mechanical properties remains a challenge for constructing flexible sensor devices. Herein, a universal strategy is presented for enhancing the mechanical strength of Mxene-based double-network hydrogels through metal ion coordination effects. Polyacrylamide (PAM)/sodium alginate (SA)/Mxene double-network (PSM-DN) hydrogels were prepared by metal ion impregnation of PAM/SA/Mxene (PSM) hydrogels. High electrical conductivity is achieved due to MXene nanosheets, while the strong coordination bond between metal ions and SA constructs a second network that increases the mechanical strength of the hydrogel by an order of magnitude. Mechanical tests demonstrated that the elastic modulus of hydrogels matches that of human tissues. Hence, they can be used as a highly sensitive electronic skin sensor to recognize the movement of different joints in humans and also as a pressure sensing interface to recognize characters for anticounterfeiting and information transfer. This work can promote the practical application of conductive hydrogels in high-tech fields, such as flexible electronic skin and interface interaction.

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Engineering the surface of carbon-based nanomaterials for dispersion control in organic solvents or polymer matrices

Cited by 15 publications

References 60 publications

Role of carbon nanotubes in remediation of pharmaceutical wastewater

Role of carbon nanotubes in remediation of pharmaceutical wastewater

Carbon Nanotube Yarns Tailored Using Dispersants and Surfactants for Flexible and Wearable Thermoelectric Generators

Enhanced Mechanical Strength of Metal Ion-Doped MXene-Based Double-Network Hydrogels for Highly Sensitive and Durable Flexible Sensors

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