Facile Approach for Preparing Chitosan/Phosphaphenanthrene-Containing Epoxy Resins with Superior Flame Retardancy and Mechanical Properties
Article
Article Title | Facile Approach for Preparing Chitosan/Phosphaphenanthrene-Containing Epoxy Resins with Superior Flame Retardancy and Mechanical Properties |
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ERA Journal ID | 211585 |
Article Category | Article |
Authors | Zhou, Pengcheng, Wang, Junjie, Bai, Ting, Chevali, Venkata, You, Dan and Huo, Siqi |
Journal Title | ACS Applied Polymer Materials |
Journal Citation | 5 (6), pp. 4256-4265 |
Number of Pages | 10 |
Year | 2023 |
Publisher | American Chemical Society |
Place of Publication | United States |
ISSN | 2637-6105 |
Digital Object Identifier (DOI) | https://doi.org/10.1021/acsapm.3c00452 |
Web Address (URL) | https://pubs.acs.org/doi/full/10.1021/acsapm.3c00452 |
Abstract | Flame-retardant epoxy (EP) composites with excellent mechanical properties that can be produced via facile, cost-effective, and environmentally friendly fabrication are highly desirable. A variety of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) derivatives are used as flame retardants for EP resin due to their high efficiency, but their synthesis is often complicated. In this work, a biomass chitosan (CS) was chosen as a synergist for DOPO to obtain high-performance, fire-safe EPs through simple blending. The total loading of CS and DOPO was limited to 10 wt % in EP, with mass ratios of CS/DOPO being 1:1, 1:2, 1:3, 2:1, or 3:1. At CS/DOPO ratios of 1:2 and 2:1, the obtained EP/10% CS1/DOPO2 and EP/10% CS2/DOPO1 achieved a UL-94 V-0 rating, and their limiting oxygen index increased to 33.7 and 32.5%, respectively. Compared with virgin EP, the heat release and smoke generation of EP/10% CS1/DOPO2 and EP/10% CS2/DOPO1 decreased, especially the total smoke production decreasing by 61.9 and 71.0%. Furthermore, the flexural strength of EP/10% CS1/DOPO2 and EP/10% CS2/DOPO1 was 36.0 and 38.4% higher than that of EP, respectively. The results indicated the synergistic effects of DOPO and CS in enhancing both flame retardancy and mechanical properties of EPs. This work offers a simple and practical strategy for preparing flame-retardant EPs with satisfactory mechanical properties. |
Keywords | epoxy resin; synergistic effect; flame retardancy; phosphaphenanthrene; chitosan |
ANZSRC Field of Research 2020 | 401609. Polymers and plastics |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Wuhan Institute of Technology, China |
Wuhan Textile University, China | |
Centre for Future Materials (Research) | |
School of Engineering | |
Centre for Future Materials |
https://research.usq.edu.au/item/yyv69/facile-approach-for-preparing-chitosan-phosphaphenanthrene-containing-epoxy-resins-with-superior-flame-retardancy-and-mechanical-properties
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