Fabrication of a core-shell structure from boron nitride nanosheets and ammonium polyphosphate (BN@APP) for reducing the fire hazards in waterborne polyurethane

IF 4 3区化学 Q2 POLYMER SCIENCE

Polymer Bulletin Pub Date : 2026-05-08 DOI:10.1007/s00289-026-06461-y

Deyu Liu, Xuan Ba, Shaoyuan Wu, Jinghan Hu, Jihong Duan, Xingyu Guan, Guoyong Zhou, Kui Wang, Weijiang Huang, Wei Yan

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引用次数: 0

Abstract

Waterborne polyurethane (WPU) has the advantage of good flexibility in the coating film, high and low-temperature resistance, and the advantages of environmental protection. Currently, there is a high demand for flame-retardant WPU. Herein, a flame-retardantcomposites (WPU/BN@APP/DIDOPO) is successfully developed by incorporating ammonium polyphosphate (APP) modified boron nitride (BN@APP) and DOPO derivatives into WPU via simple casting technology.The results indicate that BN@APP formed the intended composite structure and was well dispersed in the WPU matrix. This system significantly enhanced the char residue at 700 ℃ from 0.23% to 5.22% and reducing the peak heat release rate (pHRR) and total heat release (THR) by 58.9% and 36.9%, respectively, compared to pure WPU. Performance analysis shows that during combustion, a dense and stable expanded carbon layer forms, effectively delaying heat and mass transfer. The mechanical properties of the WPU/0.5BN@APP/5DIDOPO composite material are optimal and its breaking strength and elongation at break are superior to those of components. This work demonstrates the potential of the BN@APP/DIDOPO composite system for enhancing flame retardancy in polymeric materials, providing valuable insights for designing advanced flame-retardant systems.

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氮化硼纳米片和聚磷酸铵的核壳结构的制备（BN@APP），用于减少水性聚氨酯的火灾危险

水性聚氨酯（WPU）具有涂膜柔韧性好、耐高低温、环保等优点。目前，阻燃WPU的需求量很大。本文通过简单铸造工艺，将聚磷酸铵（APP）改性的氮化硼（BN@APP）和DOPO衍生物加入到WPU中，成功制备了阻燃复合材料（WPU/BN@APP/DIDOPO）。结果表明，BN@APP形成了预期的复合结构，并在WPU基体中分散良好。与纯WPU相比，该体系显著提高了700℃下炭渣率，从0.23%提高到5.22%，峰值放热率（pHRR）和总放热率（THR）分别降低了58.9%和36.9%。性能分析表明，燃烧过程中形成致密稳定的膨胀碳层，有效地延缓了传热传质。WPU/0.5BN@APP/5DIDOPO复合材料力学性能最佳，断裂强度和断裂伸长率优于单件材料。这项工作证明了BN@APP/DIDOPO复合体系在增强聚合物材料阻燃性方面的潜力，为设计先进的阻燃系统提供了有价值的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Polymer Bulletin 化学-高分子科学

CiteScore

6.00

自引率

6.20%

发文量

审稿时长

5.5 months

期刊介绍： "Polymer Bulletin" is a comprehensive academic journal on polymer science founded in 1988. It was founded under the initiative of the late Mr. Wang Baoren, a famous Chinese chemist and educator. This journal is co-sponsored by the Chinese Chemical Society, the Institute of Chemistry, and the Chinese Academy of Sciences and is supervised by the China Association for Science and Technology. It is a core journal and is publicly distributed at home and abroad. "Polymer Bulletin" is a monthly magazine with multiple columns, including a project application guide, outlook, review, research papers, highlight reviews, polymer education and teaching, information sharing, interviews, polymer science popularization, etc. The journal is included in the CSCD Chinese Science Citation Database. It serves as the source journal for Chinese scientific and technological paper statistics and the source journal of Peking University's "Overview of Chinese Core Journals."