The Experts below are selected from a list of 21 Experts worldwide ranked by ideXlab platform

A G Fane - One of the best experts on this subject based on the ideXlab platform.

  • 3d printing by selective laser sintering of polypropylene feed channel spacers for spiral wound membrane modules for the water industry
    Virtual and Physical Prototyping, 2016
    Co-Authors: Chee Kai Chua, Tzyy Haur Chong, A G Fane
    Abstract:

    ABSTRACTFeed spacers are net-like structures present in spiral wound membrane modules (SWM) used for treatment of water and wastewater. Feed spacers require appropriate stiffness to support the membrane sheets without damaging and puncturing the membrane surfaces. They also need to be flexible enough to be rolled up around the central Permeate Tube forming the SWM. Polypropylene (PP) is the commercially used material for feed spacers due to its flexibility and excellent chemical resistance properties. In this paper, selective laser sintering (SLS) is used to investigate the printability of net-typed structures using PP materials to represent feed spacers. SLS processing parameters such as layer thickness, part bed temperature, energy density and scan pattern were studied and net-typed PP spacers were successfully fabricated. However, an analysis on tensile test and dimensional accuracy shows that Young’s modulus of the PP material tends to be correlated to the accuracy of the dimensions of the net-typed s...

Chee Kai Chua - One of the best experts on this subject based on the ideXlab platform.

  • 3d printing by selective laser sintering of polypropylene feed channel spacers for spiral wound membrane modules for the water industry
    Virtual and Physical Prototyping, 2016
    Co-Authors: Chee Kai Chua, Tzyy Haur Chong, A G Fane
    Abstract:

    ABSTRACTFeed spacers are net-like structures present in spiral wound membrane modules (SWM) used for treatment of water and wastewater. Feed spacers require appropriate stiffness to support the membrane sheets without damaging and puncturing the membrane surfaces. They also need to be flexible enough to be rolled up around the central Permeate Tube forming the SWM. Polypropylene (PP) is the commercially used material for feed spacers due to its flexibility and excellent chemical resistance properties. In this paper, selective laser sintering (SLS) is used to investigate the printability of net-typed structures using PP materials to represent feed spacers. SLS processing parameters such as layer thickness, part bed temperature, energy density and scan pattern were studied and net-typed PP spacers were successfully fabricated. However, an analysis on tensile test and dimensional accuracy shows that Young’s modulus of the PP material tends to be correlated to the accuracy of the dimensions of the net-typed s...

Tzyy Haur Chong - One of the best experts on this subject based on the ideXlab platform.

  • 3d printing by selective laser sintering of polypropylene feed channel spacers for spiral wound membrane modules for the water industry
    Virtual and Physical Prototyping, 2016
    Co-Authors: Chee Kai Chua, Tzyy Haur Chong, A G Fane
    Abstract:

    ABSTRACTFeed spacers are net-like structures present in spiral wound membrane modules (SWM) used for treatment of water and wastewater. Feed spacers require appropriate stiffness to support the membrane sheets without damaging and puncturing the membrane surfaces. They also need to be flexible enough to be rolled up around the central Permeate Tube forming the SWM. Polypropylene (PP) is the commercially used material for feed spacers due to its flexibility and excellent chemical resistance properties. In this paper, selective laser sintering (SLS) is used to investigate the printability of net-typed structures using PP materials to represent feed spacers. SLS processing parameters such as layer thickness, part bed temperature, energy density and scan pattern were studied and net-typed PP spacers were successfully fabricated. However, an analysis on tensile test and dimensional accuracy shows that Young’s modulus of the PP material tends to be correlated to the accuracy of the dimensions of the net-typed s...

Rafi Chapanian - One of the best experts on this subject based on the ideXlab platform.

  • Analytical solution for the effective time lag of a membrane in a Permeate Tube collector in which Knudsen flow regime exists
    Journal of Membrane Science, 2005
    Co-Authors: Boguslaw Kruczek, Harry L. Frisch, Rafi Chapanian
    Abstract:

    Gas permeation in a simplified constant volume system, in which the outflow volume consists of a cylindrical collector Tube, initially at high vacuum, has been modeled. Assuming a Knudsen flow regime in the Permeate collector the analytical solution for the effective time lag of a membrane has been obtained by using the concept of linear asymptotes and Laplace transformation of the governing partial differential equation. The solution indicates that the effective time lag is different from the actual time lag of the membrane; the magnitude and the sign of the difference between the two time lags depends on the location where the pressure rise in the Permeate Tube collector is monitored, as well as, on the length and the Knudsen diffusion coefficient in the Tube.

Tan, Wen See - One of the best experts on this subject based on the ideXlab platform.

  • Selective Laser Sintering Of Polypropylene Feed Spacers For Spiral Wound Membrane Modules
    2016
    Co-Authors: Fane, Anthony Gordon, An Jia, Chua, Chee Kai, Chong, Tzyy Haur, Tan, Wen See
    Abstract:

    Feed spacers are net-like structures present in spiral wound membrane modules (SWM) used for treatment of water and wastewater. Feed spacers require appropriate stiffness to support membrane without damaging and puncturing the membrane surfaces. They also need to be flexible enough to be rolled up around the central Permeate Tube forming the SWM. Polypropylene (PP) is the commercially used material for feed spacers due to its flexibility and excellent chemical resistance properties. In this paper, Selective Laser Sintering (SLS) is used to investigate the printability of net-typed structures using polypropylene materials to represent feed spacers. SLS processing parameters such as layer thickness, part bed temperature, energy density and scan pattern were studied and net-typed PP spacers were successfully fabricated. However, an analysis on tensile test and dimensional accuracy shows that Young’s modulus of the PP material tends to be correlated to the accuracy of the dimensions of the net-typed spacer prototypes.NRF (Natl Research Foundation, S’pore)Published versio