A ground breaking polymer blend for CO2/N2 separation

Mazinani, Saeed; Ramezani, Rouzbeh; Darvishmanesh, Siavash; Molelekwa, Gomotsegang Fred; Felice, Renzo Di; Bruggen, Bart Van der

doi:10.1016/j.jcou.2018.08.024

Cited by 34 publications

(11 citation statements)

References 74 publications

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“…The rule of mixtures, KB=V1K1+V2K2, gives an estimated value for a given property, K B , often of a composite (in this case a polymer blend). This property is estimated based on the properties of the constituents in bulk ( K 1 and K 2 ), where V 1 and V 2 , are their respective volume fraction in the blend [43,44]. As the densities of PHB and PLA are approximately equal (1.2 g/cm 3 [45]), the volume fraction of the blend is the same as the mass fraction: in this case 25% PLA and 75% PHB.…”

Section: Resultsmentioning

confidence: 99%

Influence of Epoxidized Canola Oil (eCO) and Cellulose Nanocrystals (CNCs) on the Mechanical and Thermal Properties of Polyhydroxybutyrate (PHB)—Poly(lactic acid) (PLA) Blends

et al. 2019

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Two major obstacles to utilizing polyhydroxybutyrate (PHB)—a biodegradable and biocompatible polymer—in commercial applications are its low tensile yield strength (<10 MPa) and elongation at break (~5%). In this work, we investigated the modification of the mechanical properties of PHB through the use of a variety of bio-derived additives. Poly(lactic acid) (PLA) and sugarcane-sourced cellulose nanocrystals (CNCs) were proposed as mechanical reinforcing elements, and epoxidized canola oil (eCO) was utilized as a green plasticizer. Zinc acetate was added to PHB and PLA blends in order to improve blending. Composites were mixed in a micro-extruder, and the resulting filaments were molded into 2-mm sheets utilizing a hot-press prior to characterization. The inclusion of the various additives was found to influence the crystallization process of PHB without affecting thermal stability. In general, the addition of PLA and, to a lesser degree, CNCs, resulted in an increase in the Young’s modulus of the material, while the addition of eCO improved the strain at break. Overall, samples containing eCO and PLA (at concentrations of 10 wt %, and 25 wt %, respectively) demonstrated the best mechanical properties in terms of Young’s modulus, tensile strength and strain at break.

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Section: Resultsmentioning

confidence: 99%

Influence of Epoxidized Canola Oil (eCO) and Cellulose Nanocrystals (CNCs) on the Mechanical and Thermal Properties of Polyhydroxybutyrate (PHB)—Poly(lactic acid) (PLA) Blends

et al. 2019

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“…However, the as called trade‐off effect, the contradiction between permeability and selectivity, has already become the dominating factor to limit the membrane efficiency. Several strategies have been conducted to improve the separation performance, such as thermal rearrangement, 5,6 polymer blending 7 and crosslinking 8,9 . Recent years, a novel type of membranes was prepared by using polymer as matrix and inorganic filler as dispersed phase, which was the widely known mixed matrix membranes (MMMs) 10,11 .…”

Section: Introductionmentioning

confidence: 99%

PrestructuredMXenefillers with uniform channels to enhanceCO₂selective permeation in mixed matrix membranes

Guan

Yang

Dong

et al. 2020

J of Applied Polymer Sci

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The packing pattern of two-dimensional (2D) sheet-like fillers in membranes is relatively random, leading to the unfavorable permeability from tortuous diffusion pathway. A new strategy that using prestructured materials with uniform channels as fillers was proposed. In this work, Ti 3 AlC 2 is etched to prepare multilayered MXene (m-MXene), the channels aggregate as a whole unit, ensure the impossibility of ineffective packing compared with traditional individual sheets, largely facilitating the selective permeation. Then, the m-MXene/Poly (amide-6-b-ethylene oxide) (Pebax) MMMs are synthesized. SEM images demonstrate the accordion shaped structure of filler, which is the multi-channels laminates. Furthermore, the results of gas permeation test exhibit enhanced performance of m-MXene/Pebax MMMs. MMM with 0.5 wt.% m-MXene behaved best, CO 2 permeability of 86.22 Barrer as well as CO 2 /N 2 selectivity of 104.85, transcending the Robeson upper bound (2008). Having distinct enhancement for CO 2 separation, the m-MXene/Pebax MMMs in this work offer prospective practical applications. K E Y W O R D S CO 2 separation, Pebax, Mixed matrix membranes and MXene Weixin Guan and Xiaochen Yang contributed equally to this work

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“…Unlike solvents, where chemisorption involves a reaction with binding strengths exceeding 20 kcal/mol through the creation of chemical bonds between CO 2 and solvent, membranes utilize much weaker noncovalent interactions. Different types of materials have been suggested for the fabrication of permeable membranes including amorphous, non-porous polymeric membranes, [3][4][5][6][7][8][9] or crystalline materials with permanent porosity such as metal-organic frameworks (MOFs) [10][11][12] or zeolites. [13][14][15][16][17] The understanding of how the atomistic structure of materials affects the gas selectivies is a crucial process for the development of more efficient carbon capture technologies.…”

Section: Introductionmentioning

confidence: 99%

Representation of Molecular Structures with Persistent Homology Leads to the Discovery of Molecular Groups with Enhanced CO2 Binding

Townsend¹,

Micucci²,

Hymel³

et al. 2020

Preprint

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<p>Developing alternative strategies for efficient separation of CO2 and N2 is of general interest for the reduction of anthropogenic carbon emissions. In recent years, machine learning and high-throughput computational screening have been valuable tools in accelerated first-principles screening for the discovery of the next generation of functionalized molecules and materials. The application of machine learning for chemical applications requires the conversion of molecular structures to a machine-readable format known as a molecular representation. The choice of such representations impacts the performance and outcomes of chemical machine learning methods. Herein, we present a new concise and size-consistent molecular representation derived from persistent homology,an applied branch of mathematics. We have demonstrated its applicability in a high-throughput computational screening of a large molecular database (GDB-9) with more than 133,000 organic molecules. Our target is to identify novel molecules that selectively interact with CO2. The methodology and performance of the novel molecular fingerprinting method is presented and the new chemically-driven persistence image representation is used to screen the GDB-9 database to suggest molecules and/or functional groups with enhanced properties.</p>

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A ground breaking polymer blend for CO2/N2 separation

Cited by 34 publications

References 74 publications

Influence of Epoxidized Canola Oil (eCO) and Cellulose Nanocrystals (CNCs) on the Mechanical and Thermal Properties of Polyhydroxybutyrate (PHB)—Poly(lactic acid) (PLA) Blends

Influence of Epoxidized Canola Oil (eCO) and Cellulose Nanocrystals (CNCs) on the Mechanical and Thermal Properties of Polyhydroxybutyrate (PHB)—Poly(lactic acid) (PLA) Blends

PrestructuredMXenefillers with uniform channels to enhanceCO₂selective permeation in mixed matrix membranes

Representation of Molecular Structures with Persistent Homology Leads to the Discovery of Molecular Groups with Enhanced CO2 Binding

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A ground breaking polymer blend for CO2/N2 separation

Cited by 34 publications

References 74 publications

Influence of Epoxidized Canola Oil (eCO) and Cellulose Nanocrystals (CNCs) on the Mechanical and Thermal Properties of Polyhydroxybutyrate (PHB)—Poly(lactic acid) (PLA) Blends

Influence of Epoxidized Canola Oil (eCO) and Cellulose Nanocrystals (CNCs) on the Mechanical and Thermal Properties of Polyhydroxybutyrate (PHB)—Poly(lactic acid) (PLA) Blends

PrestructuredMXenefillers with uniform channels to enhanceCO2selective permeation in mixed matrix membranes

Representation of Molecular Structures with Persistent Homology Leads to the Discovery of Molecular Groups with Enhanced CO2 Binding

Contact Info

Product

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About

PrestructuredMXenefillers with uniform channels to enhanceCO₂selective permeation in mixed matrix membranes