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Effect of NiFe 2 O 4 @graphene in intumescent flame‐retarded poly(lactic acid) composites
Author(s) -
Shan Xueying,
Han Ji,
Jiang Kuanyu,
Li Jinchun,
Xing zhixiang
Publication year - 2019
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.24702
Subject(s) - intumescent , materials science , pentaerythritol , composite material , char , ammonium polyphosphate , fire retardant , thermal stability , graphene , pyrolysis , chemical engineering , nanotechnology , engineering
NiFe 2 O 4 nanoparticles loaded on graphene layers (NiFe 2 O 4 @GR) were prepared by the hydrothermal method, and they first combined with intumescent flame retardant (IFR) consisting of polyphosphate (APP) and pentaerythritol (PER) was used to prepare poly(lactic acid) (PLA) composites. Effect of NiFe 2 O 4 @GR and IFR on thermal stability and flame retardancy of PLA was investigated. Limit oxygen index (LOI) value of all the PLA composites increased, and the results of UL‐94 tests passed V0 ratings. With the presence of NiFe 2 O 4 @GR in intumescent flame‐retarded PLA composites, the initial degradation temperature had a big increase and char residue increased apparently. The ratio of graphite crystalline carbon was increased. The denser and more intumescent char layer was formed. In addition, NiFe 2 O 4 @GR had the reinforcing effect for PLA. Therefore, NiFe 2 O 4 @GR and IFR had a good synergistic effect in improving thermal stability and flame retardancy of PLA. POLYM. COMPOS., 40:652–656, 2019. © 2018 Society of Plastics Engineers