Novel exploration of the flame retardant potential of bimetallic MXene in epoxy composites

As a graphene-like material, MXene, represented by Ti3C2Tx, has been found to possess promising flame retardant potential in polymers due to their excellent thermal and catalytic actions, as well as lamellar barrier effect. Thus, it is of great significance to explore whether MXene with double trans...

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Bibliographic Details
Published inComposites. Part B, Engineering Vol. 237; p. 109862
Main Authors Gong, Kaili, Yin, Lian, Pan, Haifeng, Mao, Shaohua, Liu, Lu, Zhou, Keqing
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 15.05.2022
Subjects
Bimetallic
Flame retardancy
MXene
Polymer-matrix composites (PMCs)
Flame retardancy
Polymer-matrix composites (PMCs)
MXene
Bimetallic
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Summary:As a graphene-like material, MXene, represented by Ti3C2Tx, has been found to possess promising flame retardant potential in polymers due to their excellent thermal and catalytic actions, as well as lamellar barrier effect. Thus, it is of great significance to explore whether MXene with double transition metal components has a higher flame retardant efficiency. Herein, Ti3C2Tx and bimetallic MXene (Mo2Ti2C3Tx) were fabricated by acid-etching method and then introduced into epoxy resin (EP) for the comparative investigation of their flame-retardant effect. The results indicated that MXenes were homogeneously dispersed in EP matrix, which can contribute to the improvements of thermal and flame retardant properties of EP composites. Upon the incorporation of 1 wt% Mo2Ti2C3Tx MXene, the EP composites achieved a significantly reduced maximum mass loss rate (Rmax) by 39.4%, superb over EP/Ti3C2Tx composites. Moreover, Mo2Ti2C3Tx MXene endowed EP composites with a notable downward trend in fire risk, reflected by the decreasing PHRR of 34%, PSPR of 32.7%, TSP of 57.7%, PCO of 30.8%, along with significantly reduced SF value by 72.7%, which was superior to EP/Ti3C2Tx composites. The strong catalytic attenuation and charring effect of transition metal Mo–Ti elements for bimetallic Mo2Ti2C3Tx MXene, as well as nanosheet structure, imparted excellent fire retardant performance to EP composites. This work provides new insights into the application of bimetallic MXenes in flame retardant polymer composites.
ISSN:1359-8368
1879-1069
DOI:10.1016/j.compositesb.2022.109862