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Albert F Yee - One of the best experts on this subject based on the ideXlab platform.

  • Inorganic Particle toughening i micro mechanical deformations in the fracture of glass bead filled epoxies
    Polymer, 2001
    Co-Authors: Jonghwi Lee, Albert F Yee
    Abstract:

    General characteristics of micro-mechanical deformations found in the fracture of various glass bead filled epoxies are investigated. Among the various types of step features on fracture surfaces, the basic longitudinal texture is not influenced by the existence of glass beads, but most other steps formed are significantly affected. Various microscopic investigations show that microcracking does not extensively occur in the fracture of glass bead filled epoxies. Microcracking other than debonding of glass beads is seldom observed, and furthermore, debonding is found to occur only on and near the fracture surface. Micro-shear bands are clearly identified and distinguished from microcracks found in unnotched tensile specimens. Based on examination of micro-mechanical deformations, three types of fracture processes are proposed for glass bead filled epoxies having different glass bead contents and interfacial strengths.

  • Inorganic Particle toughening ii toughening mechanisms of glass bead filled epoxies
    Polymer, 2001
    Co-Authors: Jonghwi Lee, Albert F Yee
    Abstract:

    Abstract Based on the previously established knowledge about the micro-mechanical deformations occurring during the fracture of glass bead filled epoxies, the major energy dissipation mechanisms are investigated. Correlation studies between the fracture toughness of composites and the size of micro-mechanical deformation zones (or areal density of deformation) are used to assess the contributions of the deformations to toughening. Among the deformations found in the fracture of glass bead filled epoxies, i.e. micro-shear banding, debonding of glass beads/diffuse matrix shear yielding, and step formation, micro-shear banding is established as the major and most effective toughening mechanism. In terms of this mechanism, the negligible effect of surface treatments of glass beads on the fracture toughness of glass bead/thermoset composites can be explained successfully. This mechanism is expected to give more detailed and fundamental understanding of Inorganic Particle toughening than the crack front bowing mechanism.

  • fracture of glass bead epoxy composites on micro mechanical deformations
    Polymer, 2000
    Co-Authors: Jonghwi Lee, Albert F Yee
    Abstract:

    To understand the fracture behavior of Inorganic Particle filled polymers, glass bead filled epoxies having different glass bead contents and sizes were prepared as model systems. Although their macroscopic fracture behavior was brittle, diffuse matrix shear yielding and micro-shear banding were found to occur around crack paths. Besides these plastic deformations, debonding of glass beads, step formation on fracture surface, and birefringence due to thermal residual misfit between glass beads and matrix were identified and studied. The fracture toughness and modulus of composites generally increased with increase in the volume fraction of glass beads. Micro-shear band zone size, debonding zone size, and the areal density of steps also followed increases in the volume fraction. The effect of glass bead size on fracture toughness and modulus was not significant, but the areal density of steps was found to increase as the size decreased. Differential thermal contraction between glass beads and matrix was found to cause the thermal residual misfit, resulting in birefringence around glass beads. Microscopy studies revealed that this thermal residual misfit might not have an extensive influence on crack propagation.

Jonghwi Lee - One of the best experts on this subject based on the ideXlab platform.

  • Inorganic Particle toughening i micro mechanical deformations in the fracture of glass bead filled epoxies
    Polymer, 2001
    Co-Authors: Jonghwi Lee, Albert F Yee
    Abstract:

    General characteristics of micro-mechanical deformations found in the fracture of various glass bead filled epoxies are investigated. Among the various types of step features on fracture surfaces, the basic longitudinal texture is not influenced by the existence of glass beads, but most other steps formed are significantly affected. Various microscopic investigations show that microcracking does not extensively occur in the fracture of glass bead filled epoxies. Microcracking other than debonding of glass beads is seldom observed, and furthermore, debonding is found to occur only on and near the fracture surface. Micro-shear bands are clearly identified and distinguished from microcracks found in unnotched tensile specimens. Based on examination of micro-mechanical deformations, three types of fracture processes are proposed for glass bead filled epoxies having different glass bead contents and interfacial strengths.

  • Inorganic Particle toughening ii toughening mechanisms of glass bead filled epoxies
    Polymer, 2001
    Co-Authors: Jonghwi Lee, Albert F Yee
    Abstract:

    Abstract Based on the previously established knowledge about the micro-mechanical deformations occurring during the fracture of glass bead filled epoxies, the major energy dissipation mechanisms are investigated. Correlation studies between the fracture toughness of composites and the size of micro-mechanical deformation zones (or areal density of deformation) are used to assess the contributions of the deformations to toughening. Among the deformations found in the fracture of glass bead filled epoxies, i.e. micro-shear banding, debonding of glass beads/diffuse matrix shear yielding, and step formation, micro-shear banding is established as the major and most effective toughening mechanism. In terms of this mechanism, the negligible effect of surface treatments of glass beads on the fracture toughness of glass bead/thermoset composites can be explained successfully. This mechanism is expected to give more detailed and fundamental understanding of Inorganic Particle toughening than the crack front bowing mechanism.

  • fracture of glass bead epoxy composites on micro mechanical deformations
    Polymer, 2000
    Co-Authors: Jonghwi Lee, Albert F Yee
    Abstract:

    To understand the fracture behavior of Inorganic Particle filled polymers, glass bead filled epoxies having different glass bead contents and sizes were prepared as model systems. Although their macroscopic fracture behavior was brittle, diffuse matrix shear yielding and micro-shear banding were found to occur around crack paths. Besides these plastic deformations, debonding of glass beads, step formation on fracture surface, and birefringence due to thermal residual misfit between glass beads and matrix were identified and studied. The fracture toughness and modulus of composites generally increased with increase in the volume fraction of glass beads. Micro-shear band zone size, debonding zone size, and the areal density of steps also followed increases in the volume fraction. The effect of glass bead size on fracture toughness and modulus was not significant, but the areal density of steps was found to increase as the size decreased. Differential thermal contraction between glass beads and matrix was found to cause the thermal residual misfit, resulting in birefringence around glass beads. Microscopy studies revealed that this thermal residual misfit might not have an extensive influence on crack propagation.

Joanna Aizenberg - One of the best experts on this subject based on the ideXlab platform.

  • research update liquid gated membrane filtration performance with Inorganic Particle suspensions
    APL Materials, 2018
    Co-Authors: Jack Alvarenga, Yuki Ainge, Christopher P Williams, Aubrey Maltz, Thomas Blough, Mughees Khan, Joanna Aizenberg
    Abstract:

    Membrane filtration technology is widely used across several industries. But its efficiency is plagued by fouling, which ultimately deteriorates the membrane’s performance. This paper provides a research update on the biologically inspired liquid-enabled gating mechanism that acts as a novel filtration and separation approach offering reduction in transmembrane pressure (TMP), improved throughput, and reduced fouling. We study the performance of such Liquid Gated Membranes (LGMs) and present their benefits for filtration in the presence of model Inorganic (nanoclay Particles) fouling. We show over twofold higher throughput, nearly threefold longer time to foul, more than 60% reduction in irreversible fouling, ability to return to baseline pressures after backwashing along with reduction in use of backwash water, and 10%-15% reduction in TMP for filtration of nanoclay Particles. Fouling models exhibit not only delayed onset of fouling for LGMs compared to the control but also different fouling characteristics. These results demonstrate the potential of the liquid gating mechanism, which can lead to breakthroughs in membrane technology applications in Particle filtration, microfiltration, and ultrafiltration.Membrane filtration technology is widely used across several industries. But its efficiency is plagued by fouling, which ultimately deteriorates the membrane’s performance. This paper provides a research update on the biologically inspired liquid-enabled gating mechanism that acts as a novel filtration and separation approach offering reduction in transmembrane pressure (TMP), improved throughput, and reduced fouling. We study the performance of such Liquid Gated Membranes (LGMs) and present their benefits for filtration in the presence of model Inorganic (nanoclay Particles) fouling. We show over twofold higher throughput, nearly threefold longer time to foul, more than 60% reduction in irreversible fouling, ability to return to baseline pressures after backwashing along with reduction in use of backwash water, and 10%-15% reduction in TMP for filtration of nanoclay Particles. Fouling models exhibit not only delayed onset of fouling for LGMs compared to the control but also different fouling characterist...

  • Research Update: Liquid gated membrane filtration performance with Inorganic Particle suspensions
    AIP Publishing LLC, 2018
    Co-Authors: Jack Alvarenga, Yuki Ainge, Aubrey Maltz, Thomas Blough, Mughees Khan, Chris Williams, Joanna Aizenberg
    Abstract:

    Membrane filtration technology is widely used across several industries. But its efficiency is plagued by fouling, which ultimately deteriorates the membrane’s performance. This paper provides a research update on the biologically inspired liquid-enabled gating mechanism that acts as a novel filtration and separation approach offering reduction in transmembrane pressure (TMP), improved throughput, and reduced fouling. We study the performance of such Liquid Gated Membranes (LGMs) and present their benefits for filtration in the presence of model Inorganic (nanoclay Particles) fouling. We show over twofold higher throughput, nearly threefold longer time to foul, more than 60% reduction in irreversible fouling, ability to return to baseline pressures after backwashing along with reduction in use of backwash water, and 10%-15% reduction in TMP for filtration of nanoclay Particles. Fouling models exhibit not only delayed onset of fouling for LGMs compared to the control but also different fouling characteristics. These results demonstrate the potential of the liquid gating mechanism, which can lead to breakthroughs in membrane technology applications in Particle filtration, microfiltration, and ultrafiltration

Jack Alvarenga - One of the best experts on this subject based on the ideXlab platform.

  • research update liquid gated membrane filtration performance with Inorganic Particle suspensions
    APL Materials, 2018
    Co-Authors: Jack Alvarenga, Yuki Ainge, Christopher P Williams, Aubrey Maltz, Thomas Blough, Mughees Khan, Joanna Aizenberg
    Abstract:

    Membrane filtration technology is widely used across several industries. But its efficiency is plagued by fouling, which ultimately deteriorates the membrane’s performance. This paper provides a research update on the biologically inspired liquid-enabled gating mechanism that acts as a novel filtration and separation approach offering reduction in transmembrane pressure (TMP), improved throughput, and reduced fouling. We study the performance of such Liquid Gated Membranes (LGMs) and present their benefits for filtration in the presence of model Inorganic (nanoclay Particles) fouling. We show over twofold higher throughput, nearly threefold longer time to foul, more than 60% reduction in irreversible fouling, ability to return to baseline pressures after backwashing along with reduction in use of backwash water, and 10%-15% reduction in TMP for filtration of nanoclay Particles. Fouling models exhibit not only delayed onset of fouling for LGMs compared to the control but also different fouling characteristics. These results demonstrate the potential of the liquid gating mechanism, which can lead to breakthroughs in membrane technology applications in Particle filtration, microfiltration, and ultrafiltration.Membrane filtration technology is widely used across several industries. But its efficiency is plagued by fouling, which ultimately deteriorates the membrane’s performance. This paper provides a research update on the biologically inspired liquid-enabled gating mechanism that acts as a novel filtration and separation approach offering reduction in transmembrane pressure (TMP), improved throughput, and reduced fouling. We study the performance of such Liquid Gated Membranes (LGMs) and present their benefits for filtration in the presence of model Inorganic (nanoclay Particles) fouling. We show over twofold higher throughput, nearly threefold longer time to foul, more than 60% reduction in irreversible fouling, ability to return to baseline pressures after backwashing along with reduction in use of backwash water, and 10%-15% reduction in TMP for filtration of nanoclay Particles. Fouling models exhibit not only delayed onset of fouling for LGMs compared to the control but also different fouling characterist...

  • Research Update: Liquid gated membrane filtration performance with Inorganic Particle suspensions
    AIP Publishing LLC, 2018
    Co-Authors: Jack Alvarenga, Yuki Ainge, Aubrey Maltz, Thomas Blough, Mughees Khan, Chris Williams, Joanna Aizenberg
    Abstract:

    Membrane filtration technology is widely used across several industries. But its efficiency is plagued by fouling, which ultimately deteriorates the membrane’s performance. This paper provides a research update on the biologically inspired liquid-enabled gating mechanism that acts as a novel filtration and separation approach offering reduction in transmembrane pressure (TMP), improved throughput, and reduced fouling. We study the performance of such Liquid Gated Membranes (LGMs) and present their benefits for filtration in the presence of model Inorganic (nanoclay Particles) fouling. We show over twofold higher throughput, nearly threefold longer time to foul, more than 60% reduction in irreversible fouling, ability to return to baseline pressures after backwashing along with reduction in use of backwash water, and 10%-15% reduction in TMP for filtration of nanoclay Particles. Fouling models exhibit not only delayed onset of fouling for LGMs compared to the control but also different fouling characteristics. These results demonstrate the potential of the liquid gating mechanism, which can lead to breakthroughs in membrane technology applications in Particle filtration, microfiltration, and ultrafiltration

Mughees Khan - One of the best experts on this subject based on the ideXlab platform.

  • research update liquid gated membrane filtration performance with Inorganic Particle suspensions
    APL Materials, 2018
    Co-Authors: Jack Alvarenga, Yuki Ainge, Christopher P Williams, Aubrey Maltz, Thomas Blough, Mughees Khan, Joanna Aizenberg
    Abstract:

    Membrane filtration technology is widely used across several industries. But its efficiency is plagued by fouling, which ultimately deteriorates the membrane’s performance. This paper provides a research update on the biologically inspired liquid-enabled gating mechanism that acts as a novel filtration and separation approach offering reduction in transmembrane pressure (TMP), improved throughput, and reduced fouling. We study the performance of such Liquid Gated Membranes (LGMs) and present their benefits for filtration in the presence of model Inorganic (nanoclay Particles) fouling. We show over twofold higher throughput, nearly threefold longer time to foul, more than 60% reduction in irreversible fouling, ability to return to baseline pressures after backwashing along with reduction in use of backwash water, and 10%-15% reduction in TMP for filtration of nanoclay Particles. Fouling models exhibit not only delayed onset of fouling for LGMs compared to the control but also different fouling characteristics. These results demonstrate the potential of the liquid gating mechanism, which can lead to breakthroughs in membrane technology applications in Particle filtration, microfiltration, and ultrafiltration.Membrane filtration technology is widely used across several industries. But its efficiency is plagued by fouling, which ultimately deteriorates the membrane’s performance. This paper provides a research update on the biologically inspired liquid-enabled gating mechanism that acts as a novel filtration and separation approach offering reduction in transmembrane pressure (TMP), improved throughput, and reduced fouling. We study the performance of such Liquid Gated Membranes (LGMs) and present their benefits for filtration in the presence of model Inorganic (nanoclay Particles) fouling. We show over twofold higher throughput, nearly threefold longer time to foul, more than 60% reduction in irreversible fouling, ability to return to baseline pressures after backwashing along with reduction in use of backwash water, and 10%-15% reduction in TMP for filtration of nanoclay Particles. Fouling models exhibit not only delayed onset of fouling for LGMs compared to the control but also different fouling characterist...

  • Research Update: Liquid gated membrane filtration performance with Inorganic Particle suspensions
    AIP Publishing LLC, 2018
    Co-Authors: Jack Alvarenga, Yuki Ainge, Aubrey Maltz, Thomas Blough, Mughees Khan, Chris Williams, Joanna Aizenberg
    Abstract:

    Membrane filtration technology is widely used across several industries. But its efficiency is plagued by fouling, which ultimately deteriorates the membrane’s performance. This paper provides a research update on the biologically inspired liquid-enabled gating mechanism that acts as a novel filtration and separation approach offering reduction in transmembrane pressure (TMP), improved throughput, and reduced fouling. We study the performance of such Liquid Gated Membranes (LGMs) and present their benefits for filtration in the presence of model Inorganic (nanoclay Particles) fouling. We show over twofold higher throughput, nearly threefold longer time to foul, more than 60% reduction in irreversible fouling, ability to return to baseline pressures after backwashing along with reduction in use of backwash water, and 10%-15% reduction in TMP for filtration of nanoclay Particles. Fouling models exhibit not only delayed onset of fouling for LGMs compared to the control but also different fouling characteristics. These results demonstrate the potential of the liquid gating mechanism, which can lead to breakthroughs in membrane technology applications in Particle filtration, microfiltration, and ultrafiltration