Study on Properties of Regenerated Fluorinated Polyurethane Rigid Foam Prepared by Degrading Waste Polyurethane

Da-Sheng Zhang, Xiao-Hua Gu (), Si-Wen Liu, Yan Liu, Qing-Yun Zhou, Shang-Wen Zhu and Yan-Wei Zhu
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Da-Sheng Zhang: School of Material Science and Engineering of Qiqihar University, Qiqihar 161006, China
Xiao-Hua Gu: School of Material Science and Engineering of Qiqihar University, Qiqihar 161006, China
Si-Wen Liu: College of Innovative Material & Energy, Hubei University, Wuhan 430062, China
Yan Liu: School of Energy and Building Environment of Guilin University of Aerospace Technology, Guilin 541004, China
Qing-Yun Zhou: School of Material Science and Engineering of Qiqihar University, Qiqihar 161006, China
Shang-Wen Zhu: School of Energy and Building Environment of Guilin University of Aerospace Technology, Guilin 541004, China
Yan-Wei Zhu: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China

Sustainability, 2022, vol. 14, issue 23, 1-17

Abstract: Polyurethane (PU) has become one of the most widely used materials in the industrial field due to its excellent performance and wide range of applications. The increasing consumption of polyurethane materials has resulted in significant polyurethane waste. We can recycle waste polyurethane to obtain recycled polyurethane, but to make the recycled polyurethane meet different performance requirements in terms of utility and cost and enable the recycled polyether polyol to be further applied to high-end applications, it is necessary to improve the use value of recycled polyether polyol. In this paper, self-made Fluorodiol was added to the degradation process of waste polyurethane to obtain fluorinated regenerated polyether polyol. Recycled fluorinated polyurethane with excellent performance was prepared using fluorine-containing recycled polyether polyol. The regenerated fluorinated polyether polyols were characterized by infrared spectroscopy, viscosity, hydroxyl value, and GPC molecular weight distribution. The density, apparent morphology, water absorption, mechanical strength, thermal conductivity, and thermal stability of RFPU rigid foams with different fluorine contents were studied by scanning electron microscopy. The results show that when the addition of Fluorodiol was 8% of the mass of waste polyurethane, the density was 41.2 kg/m 3 , the immersion loss rate was 2.125%, the compressive strength was 0.315 Mpa, and the thermal conductivity was 0.0227 W/m·K. The RFPU prepared by Fluorodiol has low surface energy, good compressive strength, hydrolysis resistance, and is expected to be widely used in special insulation materials. Thus, the sustainable recycling of polyurethane is achieved.

Keywords: fluoroalcohol; waste polyurethane; recycled polyurethane; recycling; sustainable material (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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