Research Progress in Flame⁃retardant PLA Containing Bio⁃based Flame Retardants

doi:10.19491/j.issn.1001-9278.2021.02.019

Abstract

Abstract:

This paper reviewed the recent research progress in the flame-retardant modification technologies of bio-based flame retardants with respect to its application in green flame-retardant PLA. The recent progress in flame retardant PLA containing bio-based flame retardants was especially analyzed and summarized. These bio-based flame retardants covered cellulose， lignin， chitosan， phytic acid， cyclodextrin and starch. Moreover，the present problems in the applications and development of bio?based flame retardants were discussed. Finally， the development trend of bio?based flame retardants in flame-retardant PLA was prospected.

Key words: polyl（actic acid）, green flame retardant, bio-based flame retardants, modification technology

CLC Number:

TQ321

HE Jingxiu, CHEN Yajun. Research Progress in Flame⁃retardant PLA Containing Bio⁃based Flame Retardants[J]. China Plastics, 2021, 35(2): 119-131.

Figures/Tables 17

Fig.1. Chemical structure of cellulose

Fig.2. Schematic illustration of UL 94 vertical burning test for PLA composite with CF?RDP

Fig.3. Surface modification of MCC

Fig.4. The flame retardant mechanism of PLA composites containing CNF

Fig.5. Chemical structure of lignin

Fig.6. Synthesis route of UM?Lignin

Fig.7. Chemical structure of CS

Fig.8. Preparation of a core?shell?structured bio?based flame retardant (APP@CS@PA?Na) by LBL technology

Fig.9. Chemical structure of PA

Fig.10. The flame retardant mechanism of f?GNS in PLA nanocomposites

Fig.11. The preparation process of PC@APP

Fig.12. Chemical structure of β?CD

Fig.13. SEM of the residual char of flame retardant PLA composites

Fig.14. Chemical structures of amylose and amylopectin

Fig.15. The preparation process of bio?based flame retardant BPPT

Fig.16. The preparation process of a novel hybrid flame retardant (BBH) with core/shell structure

Fig.17. Preparation of bio?based flame retardant（GOH）by LBL technology

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