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Guo L, Wang F, Chai H, Liu G, Jian X, Zhao J, Liu K, Liu H, Liu T, Zhang X, Wang Y, Liu F. Mechanochemical Recycling of Flexible Polyurethane Foam Scraps for Quantitative Replacement of Polyol Using Wedge-Block-Reinforced Extruder. Polymers (Basel) 2024; 16:1633. [PMID: 38931982 PMCID: PMC11207381 DOI: 10.3390/polym16121633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 05/18/2024] [Accepted: 05/30/2024] [Indexed: 06/28/2024] Open
Abstract
Recycling flexible polyurethane foam (F-PUF) scraps is difficult due to the material's high cross-linking structure. In this work, a wedge-block-reinforced extruder with a considerable enhanced shear extrusion and stretching area between the rotating screw and the stationary wedge blocks was utilized to recycle F-PUF scraps into powder containing surface-active hydroxyl groups. The powder was then utilized for the quantitative replacement of polyol in the foaming process. Characterizations showed that the continuous shear extrusion and stretching during the extrusion process reduced the volume mean diameter (VMD) of the F-PUF powder obtained by extruding it three times at room temperature to reach 54 μm. The -OH number (OHN) of the powder prepared by extruding it three times reached 19.51 mgKOH/g due to the mechanochemical effect of the powdering method. The F-PUF containing recycled powder used to quantitively replace 10 wt.% polyol was similar in microstructure and chemical structure to the original F-PUF, with a compression set of 2%, indentation load deflection of 21.3 lbf, resilience of 43.4%, air permeability of 815.7 L/m2·s, tensile strength of 73.0 Kpa, and tear strength of 2.3 N/cm, indicating that the recycling method has potential for industrial applications.
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Affiliation(s)
- Lei Guo
- College of Electromechanical Engineering, Qingdao University of Science & Technology, Qingdao 266061, China; (L.G.); (F.W.); (H.C.); (G.L.); (X.J.); (J.Z.); (K.L.)
- National Engineering Laboratory of Advanced Tire Equipment and Key Materials, Qingdao University of Science & Technology, Qingdao 266061, China;
| | - Fu Wang
- College of Electromechanical Engineering, Qingdao University of Science & Technology, Qingdao 266061, China; (L.G.); (F.W.); (H.C.); (G.L.); (X.J.); (J.Z.); (K.L.)
| | - Hailin Chai
- College of Electromechanical Engineering, Qingdao University of Science & Technology, Qingdao 266061, China; (L.G.); (F.W.); (H.C.); (G.L.); (X.J.); (J.Z.); (K.L.)
| | - Gongxu Liu
- College of Electromechanical Engineering, Qingdao University of Science & Technology, Qingdao 266061, China; (L.G.); (F.W.); (H.C.); (G.L.); (X.J.); (J.Z.); (K.L.)
| | - Xingao Jian
- College of Electromechanical Engineering, Qingdao University of Science & Technology, Qingdao 266061, China; (L.G.); (F.W.); (H.C.); (G.L.); (X.J.); (J.Z.); (K.L.)
| | - Jinyang Zhao
- College of Electromechanical Engineering, Qingdao University of Science & Technology, Qingdao 266061, China; (L.G.); (F.W.); (H.C.); (G.L.); (X.J.); (J.Z.); (K.L.)
| | - Kexin Liu
- College of Electromechanical Engineering, Qingdao University of Science & Technology, Qingdao 266061, China; (L.G.); (F.W.); (H.C.); (G.L.); (X.J.); (J.Z.); (K.L.)
| | - Haichao Liu
- National Engineering Laboratory of Advanced Tire Equipment and Key Materials, Qingdao University of Science & Technology, Qingdao 266061, China;
| | - Tiewei Liu
- Hisense Refrigerator Co., Ltd., Qingdao 266700, China; (T.L.); (X.Z.); (Y.W.)
| | - Xiangping Zhang
- Hisense Refrigerator Co., Ltd., Qingdao 266700, China; (T.L.); (X.Z.); (Y.W.)
| | - Yongshuai Wang
- Hisense Refrigerator Co., Ltd., Qingdao 266700, China; (T.L.); (X.Z.); (Y.W.)
| | - Fumin Liu
- College of Electromechanical Engineering, Qingdao University of Science & Technology, Qingdao 266061, China; (L.G.); (F.W.); (H.C.); (G.L.); (X.J.); (J.Z.); (K.L.)
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Cozzarini L, Marsich L, Ferluga A. Scleroglucan-Based Foam Incorporating Recycled Rigid Polyurethane Waste for Novel Insulation Material Production. Polymers (Basel) 2024; 16:1360. [PMID: 38794553 PMCID: PMC11125041 DOI: 10.3390/polym16101360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 05/06/2024] [Accepted: 05/07/2024] [Indexed: 05/26/2024] Open
Abstract
This study details the synthesis and performance evaluation of a novel lightweight thermal and acoustic insulation material, resulting from the combination of a scleroglucan-based hydrogel and recycled rigid polyurethane waste powder. Through a sublimation-driven water-removal process, a porous three-dimensional network structure is formed, showcasing notable thermal and acoustic insulation properties. Experimental data are presented to highlight the material's performance, including comparisons with commercially available mineral wool and polymeric foams. This material versatility is demonstrated through tunable mechanical, thermal and acoustic characteristics, achieved by strategically adjusting the concentration of the biopolymer and additives. This adaptability positions the material as a promising candidate for different insulation applications. Addressing environmental concerns related to rigid polyurethane waste disposal, the study contributes to the circular economy.
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Affiliation(s)
- Luca Cozzarini
- Department of Engineering and Architecture, University of Trieste, Via Valerio 10, I-34127 Trieste, Italy
| | - Lucia Marsich
- MaterialScan S.r.l., Via Capodistria 28, I-34145 Trieste, Italy; (L.M.); (A.F.)
| | - Alessio Ferluga
- MaterialScan S.r.l., Via Capodistria 28, I-34145 Trieste, Italy; (L.M.); (A.F.)
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Pu Z, Jiang J, Li Y, Li L, Yang S, Wang Q. Upcycling of waste artificial turf for
high‐performance
wood‐plastic composites. J Appl Polym Sci 2022. [DOI: 10.1002/app.53115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Zhilong Pu
- State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu China
| | - Jun Jiang
- State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu China
| | - Yijun Li
- State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu China
| | - Li Li
- State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu China
| | - Shuangqiao Yang
- State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu China
| | - Qi Wang
- State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu China
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