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Preparation of Mullite/PU Nanocomposites by Double Waste Co-Recycling

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  • Xiaohua Gu

    (School of Energy and Building Environment, Guilin University of Aerospace Technology, Guilin 541004, China
    State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China)

  • Yanwei Zhu

    (State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China)

  • Siwen Liu

    (College of Innovative Material & Energy, Hubei University, Wuhan 430062, China)

  • Shangwen Zhu

    (School of Energy and Building Environment, Guilin University of Aerospace Technology, Guilin 541004, China)

  • Yan Liu

    (School of Energy and Building Environment, Guilin University of Aerospace Technology, Guilin 541004, China)

Abstract

The massive accumulation of industrial waste has become an environmental problem that is very difficult to deal with. In this paper, mullite whisker nanomaterials were developed independently using industrial waste residues, which were used to degrade polyurethane (PU) solid waste by alcoholysis with ethylene glycol (EG) and ethanolamine (ETA) bi-component, and mullite modified regenerated polyol materials were obtained by double waste synergistic recycling. Mullite/PU foam nanocomposites were prepared by one-step foaming. The analysis of the test results shows that, at EG/ETA = 2:1 and mullite whisker addition of 0.15%, the regenerated rigid PU foam obtained has low thermal conductivity and higher compressive strength, at which time the regenerated PU foam has the best performance. The FTIR test results show that the silanol of mullite reacts with isocyanate during foaming and is attached to the polyurethane chain, such that the compressive strength and thermal insulation properties are maximized. It provides a new way to create a “double waste synergy” for preparing high-value materials by comprehensively utilizing resources.

Suggested Citation

  • Xiaohua Gu & Yanwei Zhu & Siwen Liu & Shangwen Zhu & Yan Liu, 2022. "Preparation of Mullite/PU Nanocomposites by Double Waste Co-Recycling," Sustainability, MDPI, vol. 14(21), pages 1-14, November.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:21:p:14310-:d:960717
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    References listed on IDEAS

    as
    1. Min Sun & Guangzhen Qu & Litao Geng & Derui Hou & Shuo Jing, 2022. "Fatigue Properties and Damage Characteristics of Polyurethane Mixtures under a Stress Control Mode," Sustainability, MDPI, vol. 14(17), pages 1-16, September.
    2. Stefan Schützenhofer & Iva Kovacic & Helmut Rechberger & Stephanie Mack, 2022. "Improvement of Environmental Sustainability and Circular Economy through Construction Waste Management for Material Reuse," Sustainability, MDPI, vol. 14(17), pages 1-19, September.
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