The Experts below are selected from a list of 22797 Experts worldwide ranked by ideXlab platform

Jinsong Leng - One of the best experts on this subject based on the ideXlab platform.

  • chemo responsive shape memory effect in shape memory polyurethane triggered by inductive release of Mechanical Energy Storage undergoing copper ii chloride migration
    Smart Materials and Structures, 2015
    Co-Authors: Haibao Lu, Chunrui Lu, W M Huang, Jinsong Leng
    Abstract:

    In this study, 10% weight fraction of copper (II) chloride (CuCl2) was embedded into shape memory polyurethane (SMPU) by dissolving it in a solvent mixture of tetrahydrofuran and N,N-dimethyl formamide. It is found that CuCl2 particles migrate; they are released from the polymer in the water-driven shape recovery process of SMPU composites. SMPU composites, after various immersion times in water, were characterized by Fourier transform infrared spectroscopy, differential scanning calorimetry, and thermogravimetric analysis. Experimental results support that hydrogen bonding between polyurethane macromolecules and water molecules is the driving force, resulting from the inductive decrease in the glass transition temperature. Furthermore, the release of the stored Mechanical Energy in SMPU is demonstrated by means of tracking the migration of CuCl2 particles via x-ray diffraction and scanning electron microscopy tests. This study focuses on the mechanism of release of the stored Mechanical Energy of a polymer, which is identified as the driving force for the chemo-responsive shape memory effect and inductive decrease in glass transition temperature of SMPU in response to the water.

  • Chemo-responsive shape memory effect in shape memory polyurethane triggered by inductive release of Mechanical Energy Storage undergoing copper (II) chloride migration
    Smart Materials and Structures, 2015
    Co-Authors: Huang Wenyi, Jinsong Leng
    Abstract:

    In this study, 10% weight fraction of copper (II) chloride (CuCl2) was embedded into shape memory polyurethane (SMPU) by dissolving it in a solvent mixture of tetrahydrofuran and N,N-dimethyl formamide. It is found that CuCl2 particles migrate; they are released from the polymer in the water-driven shape recovery process of SMPU composites. SMPU composites, after various immersion times in water, were characterized by Fourier transform infrared spectroscopy, differential scanning calorimetry, and thermogravimetric analysis. Experimental results support that hydrogen bonding between polyurethane macromolecules and water molecules is the driving force, resulting from the inductive decrease in the glass transition temperature. Furthermore, the release of the stored Mechanical Energy in SMPU is demonstrated by means of tracking the migration of CuCl2 particles via x-ray diffraction and scanning electron microscopy tests. This study focuses on the mechanism of release of the stored Mechanical Energy of a polymer, which is identified as the driving force for the chemo-responsive shape memory effect and inductive decrease in glass transition temperature of SMPU in response to the water.

Wolf-dieter Steinmann - One of the best experts on this subject based on the ideXlab platform.

  • Thermo-Mechanical concepts for bulk Energy Storage
    Renewable and Sustainable Energy Reviews, 2017
    Co-Authors: Wolf-dieter Steinmann
    Abstract:

    Grid scale electrical Energy Storage is considered facilitative for the increased deployment of renewable Energy. Recent progress in the development of large scale thermal Energy Storage systems operated at medium and high temperatures has sparked the interest in the application of this technology as a Storage sink for electricity. Life expectancies in the range of 20–30 years, low capacity-specific costs, a low environmental impact and flexibility regarding sites make thermo-Mechanical Energy Storage a promising option for future bulk Storage of electricity. A large number of concepts have been developed, which vary in Storage efficiency, complexity and maturity. This paper provides an overview of the basic concepts for thermo-Mechanical Energy Storage and describes various implementations and their characteristics. The utilization of waste heat, the combined delivery of heat and power during discharge and the integration of Storage modules into power plants are described as additional options for some of these thermo-Mechanical concepts.

  • The CHEST (Compressed Heat Energy Storage) concept for facility scale thermo Mechanical Energy Storage
    Energy, 2014
    Co-Authors: Wolf-dieter Steinmann
    Abstract:

    Electric Energy Storage is considered to become a key element of the future electricity infrastructure. PTES (Pumped thermal electricity Storage) represents an emerging thermo Mechanical Storage technology based on the transformation of low temperature heat by surplus electricity. After transformation, the high enthalpy heat is stored. During the discharge process, this heat is used to drive a thermodynamic cycle generating electricity. This concept allows Storage of Energy in the multi-MW range for several hours without any specific geographical requirements. Various combinations of thermodynamic cycles and Storage types have been suggested for implementation using either low temperature Storage ( 500 °C). In contrast to these PTES concepts, the Compressed Heat Energy Storage (CHEST) concept presented in this paper is based on a medium temperature conventional Rankine cycle combined with a latent heat Storage unit according to the current state of the art. This concept attains an efficiency of 70% while the maximum temperature is below 400 °C. The integration of heat provided by low temperature sources during the charging process represents an additional option of the CHEST concept; losses can be compensated, the electric work delivered during the discharge process might even outweigh the work needed during the charging process.

Haibao Lu - One of the best experts on this subject based on the ideXlab platform.

  • chemo responsive shape memory effect in shape memory polyurethane triggered by inductive release of Mechanical Energy Storage undergoing copper ii chloride migration
    Smart Materials and Structures, 2015
    Co-Authors: Haibao Lu, Chunrui Lu, W M Huang, Jinsong Leng
    Abstract:

    In this study, 10% weight fraction of copper (II) chloride (CuCl2) was embedded into shape memory polyurethane (SMPU) by dissolving it in a solvent mixture of tetrahydrofuran and N,N-dimethyl formamide. It is found that CuCl2 particles migrate; they are released from the polymer in the water-driven shape recovery process of SMPU composites. SMPU composites, after various immersion times in water, were characterized by Fourier transform infrared spectroscopy, differential scanning calorimetry, and thermogravimetric analysis. Experimental results support that hydrogen bonding between polyurethane macromolecules and water molecules is the driving force, resulting from the inductive decrease in the glass transition temperature. Furthermore, the release of the stored Mechanical Energy in SMPU is demonstrated by means of tracking the migration of CuCl2 particles via x-ray diffraction and scanning electron microscopy tests. This study focuses on the mechanism of release of the stored Mechanical Energy of a polymer, which is identified as the driving force for the chemo-responsive shape memory effect and inductive decrease in glass transition temperature of SMPU in response to the water.

Chunrui Lu - One of the best experts on this subject based on the ideXlab platform.

  • chemo responsive shape memory effect in shape memory polyurethane triggered by inductive release of Mechanical Energy Storage undergoing copper ii chloride migration
    Smart Materials and Structures, 2015
    Co-Authors: Haibao Lu, Chunrui Lu, W M Huang, Jinsong Leng
    Abstract:

    In this study, 10% weight fraction of copper (II) chloride (CuCl2) was embedded into shape memory polyurethane (SMPU) by dissolving it in a solvent mixture of tetrahydrofuran and N,N-dimethyl formamide. It is found that CuCl2 particles migrate; they are released from the polymer in the water-driven shape recovery process of SMPU composites. SMPU composites, after various immersion times in water, were characterized by Fourier transform infrared spectroscopy, differential scanning calorimetry, and thermogravimetric analysis. Experimental results support that hydrogen bonding between polyurethane macromolecules and water molecules is the driving force, resulting from the inductive decrease in the glass transition temperature. Furthermore, the release of the stored Mechanical Energy in SMPU is demonstrated by means of tracking the migration of CuCl2 particles via x-ray diffraction and scanning electron microscopy tests. This study focuses on the mechanism of release of the stored Mechanical Energy of a polymer, which is identified as the driving force for the chemo-responsive shape memory effect and inductive decrease in glass transition temperature of SMPU in response to the water.

W M Huang - One of the best experts on this subject based on the ideXlab platform.

  • chemo responsive shape memory effect in shape memory polyurethane triggered by inductive release of Mechanical Energy Storage undergoing copper ii chloride migration
    Smart Materials and Structures, 2015
    Co-Authors: Haibao Lu, Chunrui Lu, W M Huang, Jinsong Leng
    Abstract:

    In this study, 10% weight fraction of copper (II) chloride (CuCl2) was embedded into shape memory polyurethane (SMPU) by dissolving it in a solvent mixture of tetrahydrofuran and N,N-dimethyl formamide. It is found that CuCl2 particles migrate; they are released from the polymer in the water-driven shape recovery process of SMPU composites. SMPU composites, after various immersion times in water, were characterized by Fourier transform infrared spectroscopy, differential scanning calorimetry, and thermogravimetric analysis. Experimental results support that hydrogen bonding between polyurethane macromolecules and water molecules is the driving force, resulting from the inductive decrease in the glass transition temperature. Furthermore, the release of the stored Mechanical Energy in SMPU is demonstrated by means of tracking the migration of CuCl2 particles via x-ray diffraction and scanning electron microscopy tests. This study focuses on the mechanism of release of the stored Mechanical Energy of a polymer, which is identified as the driving force for the chemo-responsive shape memory effect and inductive decrease in glass transition temperature of SMPU in response to the water.