Preparation of vanillin-based polyurethane/SiO2 nanocomposite foams with excellent flame retardancy and thermal insulation performance

IF 6.5 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES Composites Communications Pub Date : 2024-09-29 DOI:10.1016/j.coco.2024.102108

Ning Ding , Yi Yang , Rui Zhang, Pengwu Xu, Deyu Niu, Weijun Yang, Piming Ma

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Abstract

In this work, vanillin based inherently flame retardant polyurethane/SiO₂ composite foams were designed. Firstly, the vanillin based flame retarding diol (VDP) was synthesized. Then, the KH550 modified nano-SiO₂ (KH550-g-SiO₂) was prepared as the reinforcement. Subsequently, a series of flame-retardant polyurethane/SiO₂ composite foams (PUF-0.5P-xSiO₂) were synthesized by tailoring the hard-soft segments and KH550-g-SiO₂ contents. The results showed that KH550-g-SiO₂ significantly improve the thermal stability of the PUF-0.5P-xSiO₂ foams. In addition, the compressive strength of PUF-0.5P-xSiO₂ foams was enhanced from 0.18 MPa (PUF-0.5P) to 0.45 MPa (PUF-0.5P-2.0SiO₂) under 20 % strain. The flame retardant properties of PUF-0.5P-2.0SiO₂ reached UL-94 V-0 grade. Meanwhile, the addition of KH550-g-SiO₂ also decreased the thermal conductivity from 0.046 W/m·k to 0.037 W/m·k for PUF-0.5P-2.0SiO₂. This work may provide an approach to obtain the biobased lightweight polyurethane foams for the application in packaging and building areas.

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制备具有优异阻燃和隔热性能的香兰素基聚氨酯/二氧化硅纳米复合泡沫

本研究设计了基于香兰素的固有阻燃聚氨酯/二氧化硅复合泡沫。首先，合成了香兰素基阻燃二元醇（VDP）。然后，制备 KH550 改性纳米二氧化硅（KH550-g-SiO2）作为增强剂。随后，通过调整硬软段和 KH550-g-SiO2 的含量，合成了一系列阻燃聚氨酯/二氧化硅复合泡沫（PUF-0.5P-xSiO2）。结果表明，KH550-g-SiO2 能显著提高 PUF-0.5P-xSiO2 泡沫的热稳定性。此外，在 20% 应变条件下，PUF-0.5P-xSiO2 泡沫的抗压强度从 0.18 MPa（PUF-0.5P）提高到 0.45 MPa（PUF-0.5P-2.0SiO2）。PUF-0.5P-2.0SiO2 的阻燃性能达到了 UL-94 V-0 级。同时，添加 KH550-g-SiO2 还使 PUF-0.5P-2.0SiO2 的导热系数从 0.046 W/m-k 降至 0.037 W/m-k。这项研究为获得生物基轻质聚氨酯泡沫提供了一种方法，可用于包装和建筑领域。

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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.