Poly-D-lactic acid (PDLA) and schiff base dual modifications of the cyclodextrin-Based hierarchical fire retardants towards fire safe and UV-resistant poly-L-lactic acid (PLLA)

IF 6.5 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications Pub Date : 2025-02-01 DOI:10.1016/j.coco.2025.102257

Shuo Yang , Jing Zhang , Guyue Liu , Rui Wang , Xiuqin Zhang

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Abstract

β-cyclodextrin (β-CD) as natural polysaccharide compound possess abundant hydroxyl groups, which makes it an ideal fire retardant via structure design. Herein, the poly-d-lactic acid (PDLA) segments and a silicon containing Schiff base dual modified β-CD hierarchical fire retardants were prepared to simultaneously improve the fire retardancy, crystallinity and compatibility between polymer matrix and additive fillers. The poly-l-lactic acid (PLLA) composites with the presence of 4.5 wt% of βCD-g-PDLA@Schiff and 0.5 wt% of cobalt based metal-organic framework possessed limiting oxygen index up to 32 %, UL-94 V0 rating and a 40 % reduction in the peak heat release rate. The PDLA grafting modification acted as a nucleating agent to increase the crystallization rate and crystallinity of the PLLA. In addition, the UV absorption of PLLA/βCD-g-PDLA@Schiff + CoMOF samples in the range of 280–360 nm was enhanced by 28 % compared to pure PLLA. The present work provides a new idea for the development of PLLA-based green multifunctional additives, which is of great significance for expanding the application fields of PLLA.

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来源期刊

Composites Communications Materials Science-Ceramics and Composites

CiteScore

12.10

自引率

10.00%

发文量

340

审稿时长

36 days

期刊介绍： Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.