Flame-retardant and UV-resistant polycarbonate composites with well-preserved mechanical properties enabled by silsesquioxane/sulfonate-functionalized nano carbon black

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

Composites Communications Pub Date : 2025-04-13 DOI:10.1016/j.coco.2025.102407

Xiaodi Ye , Cheng Zhan , Ting Sai , Bingtao Wang , Juan Li , Chengfeng Zhang , Yanfei Wang , Zhenghong Guo , Siqi Huo

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Abstract

A sulfonate/silsesquioxane-functionalized nano carbon black (CBSP) was synthesized by grafting polyhedral oligomeric silsesquioxane (POSS) and sulfonate groups onto carbon black (CB) surface, aiming to meet practical requirements of outdoor-used polycarbonate (PC). Upon adding 1 wt% CBSP, PC/1.0CBSP composite displayed a limiting oxygen index (LOI) of 31.3 % with a vertical burning (UL-94) V-0 classification. Its peak heat release rate (PHRR) and total smoke release (TSR) were decreased by 39 % and 21 % relative to PC. The superior fire retardancy can be attributed to the triple reinforced effect from CB, sulfonates and POSS by promoting the formation of denser and more resilient char layers. CBSP well preserved mechanical performances of PC due to its reinforced interfacial compatibility and improved UV shielding through the absorption of UV photons by CB. This work provides a feasible strategy for fabricating fire-retardant PC composites with superior mechanical robustness and UV-resistant properties, expecting to increase applicability and lifespan.

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阻燃和抗紫外线聚碳酸酯复合材料具有良好的保存机械性能的硅氧烷/磺酸功能化纳米炭黑

为了满足户外使用的聚碳酸酯（PC）的实际要求，研究人员通过在炭黑（CB）表面接枝多面体低聚硅倍半氧烷（POSS）和磺酸盐基团，合成了一种磺酸盐/硅倍半氧烷功能化纳米炭黑（CBSP）。添加 1 wt% 的 CBSP 后，PC/1.0CBSP 复合材料的极限氧指数（LOI）为 31.3%，垂直燃烧（UL-94）等级为 V-0。与 PC 相比，其峰值热释放率 (PHRR) 和总烟释放率 (TSR) 分别降低了 39% 和 21%。优异的阻燃性可归因于 CB、磺酸盐和 POSS 的三重增强效应，它们促进了更致密、更有弹性的炭层的形成。CBSP 还能很好地保持 PC 的机械性能，因为它增强了界面相容性，并通过 CB 对紫外线光子的吸收提高了紫外线屏蔽性能。这项工作为制造具有优异机械坚固性和抗紫外线性能的阻燃 PC 复合材料提供了一种可行的策略，有望提高其适用性和使用寿命。

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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.