Preparation, Properties, and Mechanism of Flame-Retardant Poly(vinyl alcohol) Aerogels Based on the Multi-Directional Freezing Method
In this work, exfoliated <i>α</i>-zirconium phosphate (<i>α</i>-ZrP) and phosphated cellulose (PCF) were employed to synthesize poly(vinyl alcohol) composite aerogels (PVA/PCF/<i>α</i>-ZrP) with excellent flame retardancy through the multi-directional freezing met...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-12-01
|
| Series: | International Journal of Molecular Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1422-0067/23/24/15919 |
| _version_ | 1797431489446543360 |
|---|---|
| author | Jixuan Wei Chunxia Zhao Zhaorun Hou Yuntao Li Hui Li Dong Xiang Yuanpeng Wu Yusheng Que |
| author_facet | Jixuan Wei Chunxia Zhao Zhaorun Hou Yuntao Li Hui Li Dong Xiang Yuanpeng Wu Yusheng Que |
| author_sort | Jixuan Wei |
| collection | DOAJ |
| description | In this work, exfoliated <i>α</i>-zirconium phosphate (<i>α</i>-ZrP) and phosphated cellulose (PCF) were employed to synthesize poly(vinyl alcohol) composite aerogels (PVA/PCF/<i>α</i>-ZrP) with excellent flame retardancy through the multi-directional freezing method. The peak heat release rate (PHRR), total smoke release (TSR), and CO production (COP) of the (PVA/PCF<sub>10</sub>/<i>α</i>-ZrP<sub>10</sub>-3) composite aerogel were considerably decreased by 42.3%, 41.4%, and 34.7%, as compared to the pure PVA aerogel, respectively. Simultaneously, the limiting oxygen index (LOI) value was improved from 18.1% to 28.4%. The mechanistic study of flame retardancy showed evidence that PCF and <i>α</i>-ZrP promoted the crosslinking and carbonization of PVA chains to form a barrier, which not only served as insulation between the material and the air, but also significantly reduced the emissions of combustible toxic gases (CO<sub>2</sub>, CO). In addition, the multi-directional freezing method further improved the catalytic carbonization process. This mutually advantageous strategy offers a new strategy for the preparation of composite aerogels with enhanced fire resistance. |
| first_indexed | 2024-03-09T09:45:50Z |
| format | Article |
| id | doaj.art-76231125e8e848e1be4fe19aff78bb24 |
| institution | Directory Open Access Journal |
| issn | 1661-6596 1422-0067 |
| language | English |
| last_indexed | 2024-03-09T09:45:50Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | International Journal of Molecular Sciences |
| spelling | doaj.art-76231125e8e848e1be4fe19aff78bb242023-12-02T00:36:44ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672022-12-0123241591910.3390/ijms232415919Preparation, Properties, and Mechanism of Flame-Retardant Poly(vinyl alcohol) Aerogels Based on the Multi-Directional Freezing MethodJixuan Wei0Chunxia Zhao1Zhaorun Hou2Yuntao Li3Hui Li4Dong Xiang5Yuanpeng Wu6Yusheng Que7School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, ChinaSchool of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, ChinaSchool of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, ChinaSchool of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, ChinaSchool of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, ChinaSchool of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, ChinaSchool of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, ChinaSchool of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, ChinaIn this work, exfoliated <i>α</i>-zirconium phosphate (<i>α</i>-ZrP) and phosphated cellulose (PCF) were employed to synthesize poly(vinyl alcohol) composite aerogels (PVA/PCF/<i>α</i>-ZrP) with excellent flame retardancy through the multi-directional freezing method. The peak heat release rate (PHRR), total smoke release (TSR), and CO production (COP) of the (PVA/PCF<sub>10</sub>/<i>α</i>-ZrP<sub>10</sub>-3) composite aerogel were considerably decreased by 42.3%, 41.4%, and 34.7%, as compared to the pure PVA aerogel, respectively. Simultaneously, the limiting oxygen index (LOI) value was improved from 18.1% to 28.4%. The mechanistic study of flame retardancy showed evidence that PCF and <i>α</i>-ZrP promoted the crosslinking and carbonization of PVA chains to form a barrier, which not only served as insulation between the material and the air, but also significantly reduced the emissions of combustible toxic gases (CO<sub>2</sub>, CO). In addition, the multi-directional freezing method further improved the catalytic carbonization process. This mutually advantageous strategy offers a new strategy for the preparation of composite aerogels with enhanced fire resistance.https://www.mdpi.com/1422-0067/23/24/15919poly(vinyl alcohol) composite aerogel<i>α</i>-zirconium phosphatephosphate celluloseflame retardancymulti-directional freezing |
| spellingShingle | Jixuan Wei Chunxia Zhao Zhaorun Hou Yuntao Li Hui Li Dong Xiang Yuanpeng Wu Yusheng Que Preparation, Properties, and Mechanism of Flame-Retardant Poly(vinyl alcohol) Aerogels Based on the Multi-Directional Freezing Method International Journal of Molecular Sciences poly(vinyl alcohol) composite aerogel <i>α</i>-zirconium phosphate phosphate cellulose flame retardancy multi-directional freezing |
| title | Preparation, Properties, and Mechanism of Flame-Retardant Poly(vinyl alcohol) Aerogels Based on the Multi-Directional Freezing Method |
| title_full | Preparation, Properties, and Mechanism of Flame-Retardant Poly(vinyl alcohol) Aerogels Based on the Multi-Directional Freezing Method |
| title_fullStr | Preparation, Properties, and Mechanism of Flame-Retardant Poly(vinyl alcohol) Aerogels Based on the Multi-Directional Freezing Method |
| title_full_unstemmed | Preparation, Properties, and Mechanism of Flame-Retardant Poly(vinyl alcohol) Aerogels Based on the Multi-Directional Freezing Method |
| title_short | Preparation, Properties, and Mechanism of Flame-Retardant Poly(vinyl alcohol) Aerogels Based on the Multi-Directional Freezing Method |
| title_sort | preparation properties and mechanism of flame retardant poly vinyl alcohol aerogels based on the multi directional freezing method |
| topic | poly(vinyl alcohol) composite aerogel <i>α</i>-zirconium phosphate phosphate cellulose flame retardancy multi-directional freezing |
| url | https://www.mdpi.com/1422-0067/23/24/15919 |
| work_keys_str_mv | AT jixuanwei preparationpropertiesandmechanismofflameretardantpolyvinylalcoholaerogelsbasedonthemultidirectionalfreezingmethod AT chunxiazhao preparationpropertiesandmechanismofflameretardantpolyvinylalcoholaerogelsbasedonthemultidirectionalfreezingmethod AT zhaorunhou preparationpropertiesandmechanismofflameretardantpolyvinylalcoholaerogelsbasedonthemultidirectionalfreezingmethod AT yuntaoli preparationpropertiesandmechanismofflameretardantpolyvinylalcoholaerogelsbasedonthemultidirectionalfreezingmethod AT huili preparationpropertiesandmechanismofflameretardantpolyvinylalcoholaerogelsbasedonthemultidirectionalfreezingmethod AT dongxiang preparationpropertiesandmechanismofflameretardantpolyvinylalcoholaerogelsbasedonthemultidirectionalfreezingmethod AT yuanpengwu preparationpropertiesandmechanismofflameretardantpolyvinylalcoholaerogelsbasedonthemultidirectionalfreezingmethod AT yushengque preparationpropertiesandmechanismofflameretardantpolyvinylalcoholaerogelsbasedonthemultidirectionalfreezingmethod |