Bio-inspired construction of hydrophobic Mg(OH)2/Co-MOF/DOPO hybrids for simultaneously improving flame retardancy and mechanical properties of poly(L-lactic acid) composites
Article
Li, Cui, Ba, Zhaotian, Wu, Bingchen, Shi, Xinxin, Liu, Hui, Ma, Lili, Wen, Xin and Song, Pingan. 2025. "Bio-inspired construction of hydrophobic Mg(OH)2/Co-MOF/DOPO hybrids for simultaneously improving flame retardancy and mechanical properties of poly(L-lactic acid) composites." Chemical Engineering Journal. 504. https://doi.org/10.1016/j.cej.2024.158853
| Article Title | Bio-inspired construction of hydrophobic Mg(OH)2/Co-MOF/DOPO hybrids for simultaneously improving flame retardancy and mechanical properties of poly(L-lactic acid) composites |
|---|---|
| ERA Journal ID | 3854 |
| Article Category | Article |
| Authors | Li, Cui, Ba, Zhaotian, Wu, Bingchen, Shi, Xinxin, Liu, Hui, Ma, Lili, Wen, Xin and Song, Pingan |
| Journal Title | Chemical Engineering Journal |
| Journal Citation | 504 |
| Article Number | 158853 |
| Number of Pages | 12 |
| Year | 2025 |
| Publisher | Elsevier |
| Place of Publication | Netherlands |
| ISSN | 1385-8947 |
| 1873-3212 | |
| Digital Object Identifier (DOI) | https://doi.org/10.1016/j.cej.2024.158853 |
| Web Address (URL) | https://www.sciencedirect.com/science/article/abs/pii/S1385894724103440 |
| Abstract | The design of environmentally friendly flame retardants to achieve the balanced flame retardancy and mechanical properties of poly(L-lactic acid) (PLA) is a critical challenge. Herein, inspired by the micropapillae adorned with hydrophobic wax crystals structure of lotus leaf, Mg(OH)2/Co-MOF/DOPO hybrids (MH@MOF-g-DOPO) were successfully constructed through in-situ growth of Co-MOF and chemical grafting of DOPO. Thermogravimetric analysis (TGA) revealed that the Co-MOF content in MH@MOF was approximately 27.3 wt%, while the grafted DOPO in MH@MOF-g-DOPO was about 19.5 wt%. Owing to the unique microstructure, the water contact angle of MH@MOF-g-DOPO reached to 113.7°, implying its hydrophobic surface. Subsequently, the as-synthesized MH@MOF-g-DOPO was used to prepare PLA composites, which exhibited significantly improved flame retardancy, as indicated by the LOI value of 30.2 %, UL-94 V0 rating, and the reduction on PHRR by 70.1 %. The flame retardant mechanism was attributed to the synergistic effects of multiple flame retardant units (MH, Co-MOF and P) in MH@MOF-g-DOPO hybrids. Furthermore, the flame retarded PLA/20MH@MOF-g-DOPO achieved the brittle-tough transformation via uniaxial pre-stretch process, thus displayed outstanding mechanical properties (good stiffness and excellent toughness). Notably, compared to the pristine undraw PLA, the Youngꞌs modulus, tensile strength and the elongation at break PLA/20MH@MOF-g-DOPO increased by 35 %, 38 % and 1957 %, respectively. This work proposes an innovative and efficient method to achieve the excellent balance on flame retardancy and mechanical properties of PLA composites, benefiting to promoting their real-world applications as functional polymer materials. |
| Keywords | Bio-based polymers; Flame retardant hybrids; Bio-inspired synthesis; Flame retardancy; Mechanical properties |
| Contains Sensitive Content | Does not contain sensitive content |
| ANZSRC Field of Research 2020 | 340503. Organic chemical synthesis |
| Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
| Byline Affiliations | Qingdao University of Science and Technology, China |
| Centre for Future Materials | |
| School of Agriculture and Environmental Science |
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