Study on Efficient Degradation of Waste PU Foam
In this paper, the high-efficiency degradation and alcoholysis recovery of waste polyurethane foam were realized using a combination of a high-efficiency alkali metal catalyst (CsOH) and two-component mixed alcoholysis agents (glycerol and butanediol) in different proportions, using recycled polyeth...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-05-01
|
| Series: | Polymers |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4360/15/10/2359 |
| _version_ | 1797598548691255296 |
|---|---|
| author | Xiaohua Gu Xiaoyao Wang Xinyu Guo Siwen Liu Chunhua Lou Yan Liu |
| author_facet | Xiaohua Gu Xiaoyao Wang Xinyu Guo Siwen Liu Chunhua Lou Yan Liu |
| author_sort | Xiaohua Gu |
| collection | DOAJ |
| description | In this paper, the high-efficiency degradation and alcoholysis recovery of waste polyurethane foam were realized using a combination of a high-efficiency alkali metal catalyst (CsOH) and two-component mixed alcoholysis agents (glycerol and butanediol) in different proportions, using recycled polyether polyol and one-step foaming to prepare regenerated thermosetting polyurethane hard foam. The foaming agent and catalyst were adjusted experimentally to prepare regenerated polyurethane foam, and a series of tests were conducted on the viscosity, GPC, hydroxyl value, infrared spectrum, foaming time, apparent density, compressive strength, and other properties of the degradation products of the regenerated thermosetting polyurethane rigid foam. The resulting data were analyzed, and the following conclusions were drawn: The optimal conditions of alcoholysis were obtained when the mass ratio of glycerol to butanediol was 3:2, the amount of cesium hydroxide was 0.08%, the reaction temperature was 170 °C, and the reaction time was 2.5 h. Regenerated polyurethane foam with an apparent density of 34.1 kg/m<sup>3</sup> and a compressive strength of 0.301 MPa was prepared under these conditions. It had good thermal stability, complete sample pores, and a strong skeleton. At this time, these are the best reaction conditions for the alcoholysis of waste polyurethane foam, and the regenerated polyurethane foam meets various national standards. |
| first_indexed | 2024-03-11T03:22:45Z |
| format | Article |
| id | doaj.art-bc12e6db80394c85a54cf5b9d759bc51 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-11T03:22:45Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-bc12e6db80394c85a54cf5b9d759bc512023-11-18T02:58:56ZengMDPI AGPolymers2073-43602023-05-011510235910.3390/polym15102359Study on Efficient Degradation of Waste PU FoamXiaohua Gu0Xiaoyao Wang1Xinyu Guo2Siwen Liu3Chunhua Lou4Yan Liu5School of Energy and Building Environment, Guilin University of Aerospace Technology, Guilin 541004, ChinaSchool of Material Science and Engineering, Qiqihar University, Qiqihar 161006, ChinaCollege of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, ChinaCollege of Innovative Material & Energy, Hubei University, Wuhan 430062, ChinaSchool of Energy and Building Environment, Guilin University of Aerospace Technology, Guilin 541004, ChinaSchool of Energy and Building Environment, Guilin University of Aerospace Technology, Guilin 541004, ChinaIn this paper, the high-efficiency degradation and alcoholysis recovery of waste polyurethane foam were realized using a combination of a high-efficiency alkali metal catalyst (CsOH) and two-component mixed alcoholysis agents (glycerol and butanediol) in different proportions, using recycled polyether polyol and one-step foaming to prepare regenerated thermosetting polyurethane hard foam. The foaming agent and catalyst were adjusted experimentally to prepare regenerated polyurethane foam, and a series of tests were conducted on the viscosity, GPC, hydroxyl value, infrared spectrum, foaming time, apparent density, compressive strength, and other properties of the degradation products of the regenerated thermosetting polyurethane rigid foam. The resulting data were analyzed, and the following conclusions were drawn: The optimal conditions of alcoholysis were obtained when the mass ratio of glycerol to butanediol was 3:2, the amount of cesium hydroxide was 0.08%, the reaction temperature was 170 °C, and the reaction time was 2.5 h. Regenerated polyurethane foam with an apparent density of 34.1 kg/m<sup>3</sup> and a compressive strength of 0.301 MPa was prepared under these conditions. It had good thermal stability, complete sample pores, and a strong skeleton. At this time, these are the best reaction conditions for the alcoholysis of waste polyurethane foam, and the regenerated polyurethane foam meets various national standards.https://www.mdpi.com/2073-4360/15/10/2359polyurethane foamhigh-efficiency catalystrecyclingglycolysis |
| spellingShingle | Xiaohua Gu Xiaoyao Wang Xinyu Guo Siwen Liu Chunhua Lou Yan Liu Study on Efficient Degradation of Waste PU Foam Polymers polyurethane foam high-efficiency catalyst recycling glycolysis |
| title | Study on Efficient Degradation of Waste PU Foam |
| title_full | Study on Efficient Degradation of Waste PU Foam |
| title_fullStr | Study on Efficient Degradation of Waste PU Foam |
| title_full_unstemmed | Study on Efficient Degradation of Waste PU Foam |
| title_short | Study on Efficient Degradation of Waste PU Foam |
| title_sort | study on efficient degradation of waste pu foam |
| topic | polyurethane foam high-efficiency catalyst recycling glycolysis |
| url | https://www.mdpi.com/2073-4360/15/10/2359 |
| work_keys_str_mv | AT xiaohuagu studyonefficientdegradationofwastepufoam AT xiaoyaowang studyonefficientdegradationofwastepufoam AT xinyuguo studyonefficientdegradationofwastepufoam AT siwenliu studyonefficientdegradationofwastepufoam AT chunhualou studyonefficientdegradationofwastepufoam AT yanliu studyonefficientdegradationofwastepufoam |