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Latent heat absorption of alkali metal hydrates enables delayed ignition and improved flame retardancy of epoxy resin.

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Title: Latent heat absorption of alkali metal hydrates enables delayed ignition and improved flame retardancy of epoxy resin.
Authors: Feng, Jiao1 (AUTHOR), Lin, Peng1 (AUTHOR), Xiang, Simeng1 (AUTHOR), Lin, Xiang1 (AUTHOR), Liu, Feng1 (AUTHOR), Yang, Hongyu1 (AUTHOR) yhongyu@cqu.edu.cn, Feng, Xiaming1 (AUTHOR) fengxm@cqu.edu.cn, Wan, Chaojun1 (AUTHOR)
Source: Thermochimica Acta. Oct2024, Vol. 740, pN.PAG-N.PAG. 1p.
Subjects: Fireproofing, Heat release rates, Alkali metals, Heat radiation & absorption, Sodium acetate
Abstract: • A novel flame-retardant strategy of latent heat absorption has been proposed. • Alkali metal hydrates significantly delay the ignition time of epoxy composites. • Alkali metal hydrates markedly increase the flame retardancy of epoxy composite. • Alkali metal hydrates inhibit temperature rise of epoxy composite during heating. In this work, alkali metal hydrates, barium hydroxide octahydrate (BHO) and sodium acetate trihydrate (SAT) were added into epoxy resin (EP) to prepare a series of flame-retardant EP composites. It showed that EP samples can pass the V-0 rating of UL-94 when the amount of hydrated salt exceeds 45 wt%. When the additional amount of SAT is 50 wt%, the LOI of the EP sample increases to as high as 39% compared to 19% of pure EP. In addition, the time to ignition (TTI) of EP with 50 wt% SAT was prolonged to 157 s from 63 s of pure EP, which can provide valuable time for fire escape. The peak heat release rate (PHRR) was reduced by 63.9% compared with that of pure EP (from 1392.4 kW/m2 to 502.18 kW/m2), which indicated that phase change heat absorption plays a crucial role in reducing fire hazards of EP. [ABSTRACT FROM AUTHOR]
Copyright of Thermochimica Acta is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 179371212
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Label: Title
  Group: Ti
  Data: Latent heat absorption of alkali metal hydrates enables delayed ignition and improved flame retardancy of epoxy resin.
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  Data: <searchLink fieldCode="AR" term="%22Feng%2C+Jiao%22">Feng, Jiao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lin%2C+Peng%22">Lin, Peng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xiang%2C+Simeng%22">Xiang, Simeng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lin%2C+Xiang%22">Lin, Xiang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Feng%22">Liu, Feng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Hongyu%22">Yang, Hongyu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> yhongyu@cqu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Feng%2C+Xiaming%22">Feng, Xiaming</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> fengxm@cqu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Wan%2C+Chaojun%22">Wan, Chaojun</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Thermochimica+Acta%22">Thermochimica Acta</searchLink>. Oct2024, Vol. 740, pN.PAG-N.PAG. 1p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Fireproofing%22">Fireproofing</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+release+rates%22">Heat release rates</searchLink><br /><searchLink fieldCode="DE" term="%22Alkali+metals%22">Alkali metals</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+radiation+%26+absorption%22">Heat radiation & absorption</searchLink><br /><searchLink fieldCode="DE" term="%22Sodium+acetate%22">Sodium acetate</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: • A novel flame-retardant strategy of latent heat absorption has been proposed. • Alkali metal hydrates significantly delay the ignition time of epoxy composites. • Alkali metal hydrates markedly increase the flame retardancy of epoxy composite. • Alkali metal hydrates inhibit temperature rise of epoxy composite during heating. In this work, alkali metal hydrates, barium hydroxide octahydrate (BHO) and sodium acetate trihydrate (SAT) were added into epoxy resin (EP) to prepare a series of flame-retardant EP composites. It showed that EP samples can pass the V-0 rating of UL-94 when the amount of hydrated salt exceeds 45 wt%. When the additional amount of SAT is 50 wt%, the LOI of the EP sample increases to as high as 39% compared to 19% of pure EP. In addition, the time to ignition (TTI) of EP with 50 wt% SAT was prolonged to 157 s from 63 s of pure EP, which can provide valuable time for fire escape. The peak heat release rate (PHRR) was reduced by 63.9% compared with that of pure EP (from 1392.4 kW/m2 to 502.18 kW/m2), which indicated that phase change heat absorption plays a crucial role in reducing fire hazards of EP. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Thermochimica Acta is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.tca.2024.179830
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Fireproofing
        Type: general
      – SubjectFull: Heat release rates
        Type: general
      – SubjectFull: Alkali metals
        Type: general
      – SubjectFull: Heat radiation & absorption
        Type: general
      – SubjectFull: Sodium acetate
        Type: general
    Titles:
      – TitleFull: Latent heat absorption of alkali metal hydrates enables delayed ignition and improved flame retardancy of epoxy resin.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Feng, Jiao
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            NameFull: Lin, Peng
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            NameFull: Xiang, Simeng
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            NameFull: Lin, Xiang
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            NameFull: Liu, Feng
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            NameFull: Yang, Hongyu
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            NameFull: Feng, Xiaming
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            NameFull: Wan, Chaojun
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          Dates:
            – D: 01
              M: 10
              Text: Oct2024
              Type: published
              Y: 2024
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              Value: 00406031
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              Value: 740
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            – TitleFull: Thermochimica Acta
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