Synthesis and Properties of Carbon Nanotube-Grafted Silica Nanoarchitecture-Reinforced Poly(Lactic Acid)

Hsu, Yao-Wen; Wu, Chia‐Ching; Wu, Song-Mao; Su, Chean-Cheng

doi:10.3390/ma10070829

Cited by 29 publications

(12 citation statements)

References 46 publications

(77 reference statements)

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“…The defective index ratio of D to G bands (I D /I G ) exhibits the linear relationship to the inverse of in‐plane crystallite domains; 0.59 and 0.82 were calculated for the native CNT and hybridized CNS, respectively. Higher I D /I G ratio was achieved for the nanohybrid, confirmed the dense, uniform intercalation of NPs on the surface of nanotubes with minor distortion in structure after the ensued surface functionalization as discussed by Hsu et al 18 …”

Section: Resultssupporting

confidence: 74%

Facile synthesis methodology and characterization studies of silica‐decorated hybridized anisotropic nanotubes and nanosheets

Swain

Unnikrishnan

Mohanty

et al. 2022

Surface & Interface Analysis

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Carbonaceous nanomaterials and their derivatives have been inspired tremendous enthusiasm in the scientific community. They have been excogitated as the encouraging attributes and the qualified dispersed phase to develop multi‐functional composites. Particularly, graphene and carbon nanotube (anisotropic fillers) have gained substantial research interest owing to their promising characteristics. This highlights an innovative technique to synthesize hybridized nanotube and nanosheet. Initially, parent materials have been synthesized: The pristine CNT has been modified by acid mixture solution, and reduced graphene oxide has been prepared by chemical reduction method. Henceforth, the self‐assembly in situ sol–gel technique has been endorsed here. The synthesized nanohybrids have been characterized by different spectroscopic techniques: FTIR, Raman, UV, and XPS to confirm the attachment of multifunctionalities; meanwhile, the composition and stability have been investigated from XRD and TGA plots. The magnitude of surface charge and particle size distribution have been evaluated for the parent and hybridized products; further, morphology of all the samples has been authenticated from FESEM and TEM.

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Section: Resultssupporting

confidence: 74%

Facile synthesis methodology and characterization studies of silica‐decorated hybridized anisotropic nanotubes and nanosheets

Swain

Unnikrishnan

Mohanty

et al. 2022

Surface & Interface Analysis

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show abstract

“…Moreover, the pure silica XRD patterns in the range 2θ = 10-17 showed that the silica has an amorphous structure. Similarly, the ox-MWCNTs XRD patterns revealed that it has an amorphous phase [66]. For ox-MWCNTs, two peaks at 2θ = 25.4 and 42.5 typically correspond to the interlayer spacing d (002) and d (100) reflection peaks, respectively [67].…”

Section: Characteristic Bands Of Absorption For the Carboxylicmentioning

confidence: 90%

Amino Acid Functionalization of Multi-Walled Carbon Nanotubes for Enhanced Apatite Formation and Biocompatibility

Haroun¹,

Gospodinova²,

Krasteva³

2021

Nano BioMed ENG

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The limitation in bone tissue engineering is the lack of available natural or synthetic biomaterials to replace bone tissue under need. Carbon nanotubes have great potential as bone tissue scaffolds because of their remarkable mechanical and electrical properties combined with high aspect ratio.In this work, we demonstrated for the first time a novel approach based on the sol-gel technique for functionalization of multi-walled carbon nanotubes (MWCNTs) with two amino acids: L-arginine, L(+) Arg and L-aspargine, L(+) Asp. We have examined the effect of both functionalities on physicochemical properties of MWCNTs, cytotoxicity in osteosarcoma MG63 and normal fibroblastic BJ cells and the ability to induce nucleation and growth of hydroxyapatite (HA) crystals in vitro under physiological concentrations of Ca 2+ and PO 4+ (SBF). The scaffolds were characterized using Fourier transform infrared spectroscopy (FTIR-ATR), dynamic light scattering technique (DLS), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The results showed that both functionalized MWCNTs have a particle size of 269 and 411 nm, a zeta potential of -12.8 and -8.8 mV, respectively, high colloidal stability, enhanced biocompatibility, and enhanced formation of an apatite layer on the scaffolds surface in comparison to ox-MWCNTs. Altogether, the results confirmed the important role of the amino acids L(+) Arg and L(+) Asp in ox-MWCNTs-based composites for bone tissue engineering applications.

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“…Sonication has been efficiently employed to give silica-based nanocomposites. For example, guanidine acetic acid has been immobilized on the surface of modified Fe 3 O 4 @SiO 2 [50], and carbon nanotubes have been derivatized with tetraethoxysilane using an ultrasonic sol-gel process [51]. Only a few examples have studied the preparation of Class II derivatives, and an alkoxysilane derivate of thiacalix[4]arene has been efficiently covalently grafted onto silica [52].…”

Section: Introductionmentioning

confidence: 99%

Sonochemically-Promoted Preparation of Silica-Anchored Cyclodextrin Derivatives for Efficient Copper Catalysis

et al. 2019

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Silica-supported metallic species have emerged as valuable green-chemistry catalysts because their high efficiency enables a wide range of applications, even at industrial scales. As a consequence, the preparation of these systems needs to be finely controlled in order to achieve the desired activity. The present work presents a detailed investigation of an ultrasound-promoted synthetic protocol for the grafting of β-cyclodextrin (β-CD) onto silica. Truly, ultrasound irradiation has emerged as a fast technique for promoting efficient derivatization of a silica surface with organic moieties at low temperature. Three different β-CD silica-grafted derivatives have been obtained, and the ability of β-CD to direct and bind Cu when CD is bonded to silica has been studied. A detailed characterization has been performed using TGA, phenolphthalein titration, FT-IR, diffuse reflectance (DR), DR UV-Vis, as well as the inductively-coupled plasma (ICP) of the β-CD silica-grafted systems and the relative Cu-supported catalysts. Spectroscopic characterization monitored the different steps of the reaction, highlighting qualitative differences in the properties of amino-derivatized precursors and final products. In order to ensure that the Cu-β-CD silica catalyst is efficient and robust, its applicability in Cu(II)-catalyzed alkyne azide reactions in the absence of a reducing agent has been explored. The presence of β-CD and an amino spacer has been shown to be crucial for the reactivity of Cu(II), when supported.

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Synthesis and Properties of Carbon Nanotube-Grafted Silica Nanoarchitecture-Reinforced Poly(Lactic Acid)

Cited by 29 publications

References 46 publications

Facile synthesis methodology and characterization studies of silica‐decorated hybridized anisotropic nanotubes and nanosheets

Facile synthesis methodology and characterization studies of silica‐decorated hybridized anisotropic nanotubes and nanosheets

Amino Acid Functionalization of Multi-Walled Carbon Nanotubes for Enhanced Apatite Formation and Biocompatibility

Sonochemically-Promoted Preparation of Silica-Anchored Cyclodextrin Derivatives for Efficient Copper Catalysis

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