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

Xiaohua Gu (), Yanwei Zhu, Siwen Liu, Shangwen Zhu and Yan Liu ()
Additional contact information
Xiaohua Gu: School of Energy and Building Environment, Guilin University of Aerospace Technology, Guilin 541004, 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

Sustainability, 2022, vol. 14, issue 21, 1-14

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.

Keywords: waste PU rigid foam; double waste synergy; industrial waste residue; mullite; alcoholysis (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/14/21/14310/pdf (application/pdf)
https://www.mdpi.com/2071-1050/14/21/14310/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:14:y:2022:i:21:p:14310-:d:960717

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().