Toward Greener Chemistry Methods for Preparation of Hybrid Polymer Materials Based on Carbon Nanotubes

Ávila‐Orta, Carlos A.; González‐Morones, Pablo; Espinoza-González, Carlos; Martínez‐Colunga, Juan Guillermo; Neira-Velázquez, MaríaGuadalupe; Sáenz‐Galindo, Aidé; ItzelLópez-López, Lluvia

doi:10.5772/51257

Cited by 5 publications

(2 citation statements)

References 52 publications

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“…Furthermore, strong oxidants or concentrated acids are environmentally unfriendly, which are often used for CNT functionalization. A non-covalent mechanism associated with the adsorption of the chemical moieties onto the nanotube surface, either via π-π stacking interaction such as in DNA, uncharged surfactants, etc., or through coulomb attraction in the case of charged chemical moieties [16]. Compared to covalent functionalizations, non-covalent functionalizations are more capable of preserving intrinsic properties of CNTs when improving exfoliation and interfacial bonding.…”

Section: Water Dispersibility Of Cntsmentioning

confidence: 99%

Production of Water Dispersible Carbon Nanotubes and Nanotube/Cellulose Composite

Maria¹,

Mieno²

2018

Carbon Nanotubes - Recent Progress

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Polymer wrapping methods have been used to disperse carbon nanotube (CNT) by using gelatin, an environment-friendly and easily decomposable biopolymer. The amino acid chain of gelatin becomes immobilized by the physical adsorption in the side wall of the CNTs through hydrophobic-hydrophobic interaction and results in the untangling of the CNT bundles. The dispersed solution remains stable for more than a month. Furthermore, this technique does not affect the physical properties of CNTs while enabling their dispersion in aqueous solutions. In addition, gelatin can be easily removed from the nanotubes after the dispersion of nanotubes by heating in water and filtration. Gelatin-dispersed CNTs are homogeneously mixed with the cellulose suspension and dried at room temperature to produce CNT/cellulose composite paper sheet. Adding multiwalled carbon nanotubes (MWNTs) in composite improves the mechanical, thermal, and electrical properties of cellulose. SEM investigation confirms the homogeneous distribution of MWNTs in the cellulose, which can be attributed to the improvement of its characteristics. Both sides of the CNT/cellulose sheet show uniform electrical conductivity, which is enhanced by increasing the MWNTs' content. IR image of the sheet clearly shows the temperature homogeneity of the surface. Thermal stability and the flame retardancy of the sheet are also found to be improved. The sheet has also strong absorbing of electromagnetic waves, which make them important for microwave technology applications.

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Section: Water Dispersibility Of Cntsmentioning

confidence: 99%

Production of Water Dispersible Carbon Nanotubes and Nanotube/Cellulose Composite

Maria¹,

Mieno²

2018

Carbon Nanotubes - Recent Progress

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“…Some of these are mechanical mixing, i.e., extrusion [ 3 , 4 , 5 ]; injection molding [ 6 , 7 ]; roller milling, in which the polymers are mixed using heated rollers that can shear and blend the materials together; and solution mixing, in which the polymers are dissolved in a common solvent and then blended together [ 8 , 9 , 10 ]. It can be used in the pharmaceutical industry, in the plastics industry [ 11 , 12 ], in the textile industry, and elsewhere [ 13 , 14 , 15 ]. In addition, in situ polymerization is often used to obtain a material with improved properties [ 11 , 12 ], as well as reactive blending, in which chemical reactions between the polymers take place during the mixing process [ 16 , 17 , 18 ], and other processes in which different mixing methods are combined to obtain acceptable results.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Analysis of Morphology and Surface Properties of Poly(lactic acid)/Poly(ε-caprolactone)/Hydrophilic Nano-Silica Blends

Mahović Poljaček,

Priselac,

Tomašegović

et al. 2024

Polymers

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A quantitative analysis of the morphology, as well as an analysis of the distribution of components and surface/interfacial properties in poly(lactic acid)(PLA) InegoTM 3251D, poly(ε-caprolactone) (PCL) Capa 6800 and nano-silica (SiO2) Aerosil®200 blends, was conducted in this research. The study aimed to improve the understanding of how PLA, PCL, and nano-SiO2 interact, resulting in the specific morphology and surface properties of the blends. Samples were produced by varying the concentration of all three components. They were analyzed using SEM, EDS mapping, water contact angle measurements, surface free energy calculation, adhesion parameter measurements, and FTIR-ATR spectroscopy. The results showed that the addition of SiO2 nanoparticles led to an increase in the contact angle of water, making the surface more hydrophobic. SEM images of the blends showed that increasing the PCL content reduced the size of spherical PCL elements in the blends. FTIR-ATR analysis showed that SiO2 nanoparticles influenced the structure ordering of PLA in the blend with equal portions of PLA and PCL. In the samples with a higher PCL content, the spherical elements present in the samples with a higher PLA/PCL ratio have been reduced, indicating better interactions at the interface between PLA, PCL, and SiO2. SEM-EDS mapping of the PLA/PCL 100/0 blend surfaces revealed the presence of SiO2 clusters and the silicon (Si) concentration reaching up to ten times higher than the nominal concentration of SiO2. However, with the addition of 3% SiO2 to the blend containing PCL, the structure became more granular. Specifically, Si protrusions in the sample PLA/PCL 90/10 with 3% SiO2 displayed 29.25% of Si, and the sample PLA/PCL 70/30 with 3% SiO2 displayed an average of 10.61% of Si at the protrusion locations. The results confirmed the affinity of SiO2 to be encapsulated by PCL. A better understanding of the interactions between the materials in the presented blends and the quantitative analysis of their morphology could improve the understanding of their properties and allow the optimization of their application for different purposes.

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The influence of acid-treated multi-walled carbon nanotubes on the surface morphology and thermal properties of alanine-based poly(amide–imide)/MWCNT nanocomposites system

Mallakpour

Behranvand

2014

Colloid Polym Sci

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Toward Greener Chemistry Methods for Preparation of Hybrid Polymer Materials Based on Carbon Nanotubes

Cited by 5 publications

References 52 publications

Production of Water Dispersible Carbon Nanotubes and Nanotube/Cellulose Composite

Production of Water Dispersible Carbon Nanotubes and Nanotube/Cellulose Composite

Quantitative Analysis of Morphology and Surface Properties of Poly(lactic acid)/Poly(ε-caprolactone)/Hydrophilic Nano-Silica Blends

The influence of acid-treated multi-walled carbon nanotubes on the surface morphology and thermal properties of alanine-based poly(amide–imide)/MWCNT nanocomposites system

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