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Article Dans Une Revue Composites Part A: Applied Science and Manufacturing Année : 2019

The preparation of a bio-polyelectrolytes based core-shell structure and its application in flame retardant polylactic acid composites

Xiaodong Jin
  • Fonction : Auteur
Suping Cui
  • Fonction : Auteur
Shibing Sun
  • Fonction : Auteur
Xiaoyu Gu
  • Fonction : Auteur
  • PersonId : 765935
  • IdRef : 16476142X
Hongfei Li
  • Fonction : Auteur
Xiaodong Liu
Wufei Tang
  • Fonction : Auteur
Jun Sun
Sheng Zhang
  • Fonction : Auteur

Résumé

A bio-polyelectrolyte (PC) was synthesized by reacting phytic acid (PA) with casein (CS), and used as the shell materials to microencapsulate ammonium polyphosphate (APP). The obtained core-shell structured flame retardant (PC@APP) was incorporated into polylactic acid (PLA). The dispersion of PC@APP was greatly improved. As a result, the elongation at break and notched impact strength were improved from 6.9% and 3.5 KJ/m2 of neat PLA sample to 14.4% and 4.7 KJ/m2 of PLA samples containing 5%PC@APP. Moreover, the fire resistance of PLA/5%PC@APP composites was also enhanced. The limiting oxygen index (LOI) value was increased from 19.6% to 28.3%; the vertical burning (UL-94) rating was upgraded from no rating to V-0; and the peak heat release rate value was decreased from 935.8 kW/m2 to 747.9 kW/m2. It is suggested that the well-dispersed PC@APP alters the degradation routine of PLA matrix, leading to the rapid formation of physical barriers.
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Dates et versions

hal-02168195 , version 1 (28-06-2019)

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Citer

Xiaodong Jin, Suping Cui, Shibing Sun, Xiaoyu Gu, Hongfei Li, et al.. The preparation of a bio-polyelectrolytes based core-shell structure and its application in flame retardant polylactic acid composites. Composites Part A: Applied Science and Manufacturing, 2019, Composites Part A: Applied Science and Manufacturing, pp.105485. ⟨10.1016/j.compositesa.2019.105485⟩. ⟨hal-02168195⟩
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