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Phosphorus and nitrogen supramolecule for fabricating flame-retardant, transparent and robust polyvinyl alcohol film.

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Title: Phosphorus and nitrogen supramolecule for fabricating flame-retardant, transparent and robust polyvinyl alcohol film.
Authors: Xiang, Simeng1 (AUTHOR), Chen, Chiyuan1 (AUTHOR), Liu, Feng1 (AUTHOR), Wang, Linsheng1 (AUTHOR), Feng, Jiao1 (AUTHOR), Lin, Xiang1 (AUTHOR), Yang, Hongyu1 (AUTHOR) yhongyu@cqu.edu.cn, Feng, Xiaming1 (AUTHOR) fengxm@cqu.edu.cn, Wan, Chaojun1 (AUTHOR)
Source: Journal of Colloid & Interface Science. Sep2024, Vol. 669, p775-786. 12p.
Subjects: Polyvinyl alcohol, Fireproofing, Fireproofing agents, Heat release rates, Thermal stability
Abstract: [Display omitted] • P N flame retardant HEPFR can be simply synthesized by supramolecular assembly. • HEPFR has the modification effect of "one stone, three birds" on PVA. • Flame-retardant, transparent and robust PVA film can be easily fabricated. Supramolecular flame retardants have attracted increasing attention recently due to their simple and eco-friendly preparation process. In this study, a novel flame retardant HEPFR was prepared using supramolecular self-assembly technology between piperazine and 1-hydroxy ethylidene-1,1-diphosphonic acid (HEDP). It was introduced into polyvinyl alcohol (PVA) matrix to form PVA/HEPFR composite film. Subsequently, the transparency, mechanical properties, thermal stability, and flame retardancy of PVA/HEPFR films were studied. Due to the hydrogen bonded cross-linked network structure between PVA and HEPFR, the mechanical properties of PVA/HEPFR films have been improved, while maintaining good transparency. With 10 wt% addition of HEPFR, PVA films can reach the VTM-0 level in UL-94 testing. And the limiting oxygen index can be increased from 18.5% of pure PVA to 26.5%. The peak heat release rate was reduced by 61.5%. The flame retardancy and thermal stability of PVA/HEPFR films have been greatly improved. This study provides a "one stone, three birds" strategy for preparing flame-retardant, transparent, and robust PVA film. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:[Display omitted] • P N flame retardant HEPFR can be simply synthesized by supramolecular assembly. • HEPFR has the modification effect of "one stone, three birds" on PVA. • Flame-retardant, transparent and robust PVA film can be easily fabricated. Supramolecular flame retardants have attracted increasing attention recently due to their simple and eco-friendly preparation process. In this study, a novel flame retardant HEPFR was prepared using supramolecular self-assembly technology between piperazine and 1-hydroxy ethylidene-1,1-diphosphonic acid (HEDP). It was introduced into polyvinyl alcohol (PVA) matrix to form PVA/HEPFR composite film. Subsequently, the transparency, mechanical properties, thermal stability, and flame retardancy of PVA/HEPFR films were studied. Due to the hydrogen bonded cross-linked network structure between PVA and HEPFR, the mechanical properties of PVA/HEPFR films have been improved, while maintaining good transparency. With 10 wt% addition of HEPFR, PVA films can reach the VTM-0 level in UL-94 testing. And the limiting oxygen index can be increased from 18.5% of pure PVA to 26.5%. The peak heat release rate was reduced by 61.5%. The flame retardancy and thermal stability of PVA/HEPFR films have been greatly improved. This study provides a "one stone, three birds" strategy for preparing flame-retardant, transparent, and robust PVA film. [ABSTRACT FROM AUTHOR]
ISSN:00219797
DOI:10.1016/j.jcis.2024.05.060