Enhancing interfacial adhesion of MXene nanofiltration membranes via pillaring carbon nanotubes for pressure and solvent stable molecular sieving

Molecular sieving using metal–polymer coordination membranes in organic media

Journal of Materials Chemistry A ◽

10.1039/d1ta02601a ◽

2021 ◽

Author(s):

Rifan Hardian ◽

Peter Pogany ◽

Young Moo Lee ◽

Gyorgy Szekely

Keyword(s):

Chemical Resistance ◽

Organic Media ◽

Nanofiltration Membranes ◽

Molecular Sieving ◽

Metal Polymer

Improving the chemical resistance of membranes without sacrificing their molecular sieving performance is highly challenging. Herein, a novel scalable methodology was developed for fabricating solvent-resistant nanofiltration membranes based on metal–polymer...

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Synthesis and Characterization of Poly(2,5-benzimidazole) (ABPBI) Grafted Carbon Nanotubes

MRS Proceedings ◽

10.1557/proc-1240-ww09-02 ◽

2009 ◽

Vol 1240 ◽

Cited By ~ 1

Author(s):

Ji-Ye Kang ◽

Su-Mi Eo ◽

Loon-Seng Tan ◽

Jong-Beom Baek

Keyword(s):

Carbon Nanotubes ◽

Carbon Nanotube ◽

Interfacial Adhesion ◽

Synthesis And Characterization ◽

Acylation Reaction ◽

Single Walled Carbon Nanotube ◽

Mechanical And Electrical Properties ◽

Multi Walled Carbon Nanotube

AbstractSingle-walled carbon nanotube (SWCNT) and multi-walled carbon nanotube (MWCNT) were functionalized with 3,4-diaminobenzoic acid via “direct” Friedel-Crafts acylation reaction in PPA/P2O5 to afford ortho-diamino-functionalized SWCNT (DIF-SWCNT) and MWCNT (DIF-MWCNT). The resultant DIF-SWCNT and DIF-MWCNT showed improved solubility and dispersibility. To improve interfacial adhesion between CNT and polymer matrix, the grafting of ABPBI onto the surface of DIF-SWCNT (10 wt%) or DIF-MWCNT (10 wt%) was conducted by simple in-situ polymerization of AB monomer, 3,4-diaminobenzoic acid dihydrochloride, in PPA. The resultant ABPBI-g-MWCNT and ABPBI-g-SWCNT showed improved the mechanical and electrical properties.

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Light isotope separation in carbon nanotubes through quantum molecular sieving

Physical Review B ◽

10.1103/physrevb.63.245419 ◽

2001 ◽

Vol 63 (24) ◽

Cited By ~ 69

Author(s):

Sivakumar R. Challa ◽

David S. Sholl ◽

J. Karl Johnson

Keyword(s):

Carbon Nanotubes ◽

Isotope Separation ◽

Light Isotope ◽

Molecular Sieving

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Highly permeable carbon nanotubes/polyamide layered membranes for molecular sieving

Chemical Engineering Journal ◽

10.1016/j.cej.2021.130684 ◽

2021 ◽

pp. 130684

Author(s):

Li-Ye Chen ◽

Meng-Ying Jiang ◽

Qian Zou ◽

Si-Wei Xiong ◽

Ze-gang Wang ◽

...

Keyword(s):

Carbon Nanotubes ◽

Molecular Sieving

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Effect of the addition of aliphatic diamine-functionalized carbon nanotubes on the interfacial adhesion of glass fiber/epoxy composites

Textile Research Journal ◽

10.1177/00405175211051952 ◽

2021 ◽

pp. 004051752110519

Author(s):

Yecheng Fan ◽

Shen Ziyue ◽

Shaohua Zeng ◽

Pengpeng Chen ◽

Ying Xu ◽

...

Keyword(s):

Carbon Nanotubes ◽

Glass Fiber ◽

Interfacial Adhesion ◽

Control Sample ◽

Epoxy Composites ◽

Aliphatic Diamine ◽

Uniform Dispersion ◽

Fiber Matrix ◽

Interlaminar Shear ◽

Chain Lengths

To improve the interfacial adhesion of glass fiber (GF)/epoxy composites, the GF surface was treated by dispersing aliphatic diamine-functionalized multi-walled carbon nanotubes (MWCNTs). Carboxyl MWCNTs were first modified by aliphatic diamine with different alkyl chain lengths and then deposited on the surface of GF. The effect of aliphatic diamine chain lengths on the MWCNTs’ dispersion and interfacial properties of resultant composites was investigated in detail. The results showed that uniform dispersion of MWCNTs and strong fiber/matrix interfacial adhesion could be achieved, based on the grafting of 1,8-octanediamine onto MWCNTs. Compared with the control sample, the interlaminar shear, flexural, and tensile strengths of the treated composites increased by 41%, 29%, and 30%, respectively; the interlaminar fracture toughness and storage modulus in the glass region were significantly enhanced; and the glass transition temperature increased by more than 8°C. This work demonstrates that the carbon nanotubes functionalized by appropriate chain lengths of amine modifier can improve the fiber/matrix interfacial interactions and thus enhance the strength, toughness, and stiffness of fiber-reinforced composites.

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THE STRENGTH OF NANOCOMPOSITES POLYMER / 2D-NANOFILLER WITH ULTRASMALL FILLER CONTENTS

Spravochnik Inzhenernyi zhurnal ◽

10.14489/hb.2020.12.pp.003-006 ◽

2020 ◽

pp. 3-6

Author(s):

Gasan M. Magomedov ◽

Guseyn M. Magomedov ◽

I. V. Dolbin

Keyword(s):

Carbon Nanotubes ◽

Carbon Fibers ◽

Interfacial Adhesion ◽

Fracture Process ◽

Interfacial Strength ◽

Geometrical Parameters ◽

Correct Description ◽

Two Phase ◽

Small Aggregation ◽

Appreciable Reduction

The theoretical model, using the notions of fractal analysis is proposed for description of strength of nanocomposites polymer/2D-nanofiller on the example of nanocomposites polyvinylalcohol/boron nitride. For correct description of strength of these two-phase nanomaterial the knowledge of initial characteristics of matrix polymer (stress of fracture), geometrical parameters of nanofiller and level of interfacial adhesion polymer matrix-nanofiller is necessary. The indicated level, characterizing by shear interfacial strength, was determined theoretically within the framework of fractal conception of adhesion. Its absolute values found high enough – they are comparable with this characteristic in systems polymer-carbon nanotubes and are higher essentially than in systems polymer-microfiber (glassy and carbon fibers). This factor defines high enough strength of the considered nanocomposites. The important factor for fracture process of nanomaterials is aggregation of initial platelets of nanofiller, which forms “packets” (tactoids) of such platelets. The relatively small aggregation degree of nanofiller gives appreciable reduction of strength of nanocomposites polymer/2D-nanofiller. The indicated reduction is connected with transition of 2D-nanofiller structure from exfoliated to intercalated one, i.e. from separate platelets to their tactoids.

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The Adhesion and Diffusion of Saturate, Asphaltene, Resin and Aromatic (SARA) Molecules on Oxygenated and Hydrogenated Carbon Nanotubes (CNTs)

Infrastructures ◽

10.3390/infrastructures6090123 ◽

2021 ◽

Vol 6 (9) ◽

pp. 123

Author(s):

Mehdi Shishehbor ◽

Hadi S. Esmaeeli ◽

M. Reza Pouranian

Keyword(s):

Carbon Nanotubes ◽

Interfacial Adhesion ◽

Asphalt Binder ◽

Adhesion Energy ◽

Dynamics Simulation ◽

Hydroxyl Groups ◽

Reactive Molecular Dynamics ◽

Cnts Surface ◽

And Diffusion ◽

Diffusion Properties

The interfacial adhesion between asphalt binder and carbon nanotubes (CNTs) depends on many nanoscopic properties such as diffusion of SARA molecules on CNTs surface. Functionalization of CNTs with Oxygens (O=CNTs), hydroxyl groups (HO–CNTs), and hydrogens (H–CNTs) has been an effective way to modify the surface properties of CNTs and ultimately the macroscopic properties of the CNT-composites. This paper presents the effect of different dosages of oxygenated and hydrogenated CNTs on the adhesion and diffusion of SARA molecules on CNTs’ surfaces. First, reactive molecular dynamics simulation is used to oxygenate and hydrogenate CNTs up to a certain dosage. Next, it is employed to model the interaction and diffusion of SARA molecules with the functionalized CNTs. We employ the steer molecular dynamic (SMD) and Einstein formula to calculate the adhesion and diffusion properties. The results demonstrate that hydrogenation has little effect on the adhesion energy, while oxygenation can increase adhesion energy up to 100% for 25% dosage. The diffusion coefficient dramatically drops for both oxygenated and hydrogenated CNTs, with lower values for the latter. We observe that for hydrogenated and oxygenated CNTs at different dosages, asphaltene, resin, aromatic, and saturate molecules have the highest to lowest values, respectively.

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