Fabrication of green lignin-based flame retardants for enhancing the thermal and fire retardancy properties of polypropylene/wood composites

Liu, Lina and Qian, Mengbo and Song, Ping'an and Huang, Guobo and Yu, Youming and Fu, Shenyuan (2016) Fabrication of green lignin-based flame retardants for enhancing the thermal and fire retardancy properties of polypropylene/wood composites. ACS Sustainable Chemistry and Engineering, 4 (4). pp. 2422-2431.

Abstract

Abstract: Despite growing extensive applications, until now the poor thermal stability and flame retardancy properties of wood-plastic composites (WPC) remain effectively unsolved. Meanwhile, industrial lignin has emerged as a potential component for polymer composites due to many advantages including abundance, rich reactive functional groups, high carbon content and tailored capability for chemical transformations. Herein, we have fabricated one biobased flame retardant based on industrial lignin chemically grafted with phosphorus, nitrogen and copper elements, as the functional additive for the WPC. Compared with unmodified lignin (O-lignin), functionalized lignin (F-lignin) is more effective to improve the thermal stability and flame retardancy of WPC because of presence of the flame retardancy elements (P and N) and the catalytic effect of Cu2+ on the char-formation. The presence of F-lignin not only reduces the heat release rate, total heat release and slows down the combustion process but also decreases total smoke production rate during combustion. The char residue shows that it is the increased char residues and its continuous compact char formed during burning that are responsible for enhanced flame retardancy properties. This work suggests a novel green strategy for improving flame retardancy performance of WPC and promoting the utilization of industrial lignin.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 05 Jun 2017 22:16
Last Modified: 05 Jun 2017 22:16
Uncontrolled Keywords: Flame retardancy; Lignin; Thermal properties; Wood-plastic composites (WPC); Chemical transformations; Functional additives; Heat Release Rate (HRR); Polypropylene/wood composites; Reactive functional groups; Smoke production rate; Wood plastic composite; Thermodynamics; Chemical Agents and Basic Industrial Chemicals; Chemical Products Generally; Wood and Wood Products; Cellulose, Lignin and Derivatives; Organic Polymers; Plastics Products
Fields of Research : 03 Chemical Sciences > 0306 Physical Chemistry (incl. Structural) > 030602 Chemical Thermodynamics and Energetics
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1021/acssuschemeng.6b00112
URI: http://eprints.usq.edu.au/id/eprint/31625

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