Boron-modified form stable phase change materials with high energy storage, flame retardancy, and smoke suppression for advanced photo-to-heat conversion

IF 5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Polymer Testing Pub Date : 2025-04-10 DOI:10.1016/j.polymertesting.2025.108804

Ruizhi Zheng , Renjie Chen , Feng Wu , Delong Xie , Yi Mei

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Abstract

This study developed form-stable phase change materials (FSPCMs) with high energy storage density, superior flame retardancy, and effective smoke suppression by incorporating boric acid-grafted octadecanol (BO) as the phase change material and expanded graphite (EG)/low-density polyethylene (LDPE) as the supporting matrix. To further enhance flame retardancy, ammonium polyphosphate (APP) and pentaerythritol (PER) were introduced as synergistic flame retardants. The optimized FSPCMs (60 wt% BO, 27 wt% LDPE, 3 wt% EG, 6 wt% APP, and 3 wt% PER) exhibited outstanding performance, achieving a latent heat of 122.6 J/g, a limiting oxygen index (LOI) of 23.3 % (UL-94 V-0 rating), a 78.5 % reduction in smoke production rate, a 68.3 % decrease in smoke density, and a 77.2 % photo-thermal conversion efficiency. A systematic analysis of BO's molecular structure revealed its significant influence on phase change behavior and flame-retardant properties. The boric acid grafting strategy notably enhanced BO's char-forming capability, elucidating its synergistic flame-retardant and smoke-suppression mechanisms. The developed FSPCMs hold promise to applied in energy storage and safety-critical applications.

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硼改性形成稳定的相变材料，具有高能量储存，阻燃和抑烟，用于先进的光热转换

本研究以硼酸接枝十八醇（BO）为相变材料，膨胀石墨(EG)/低密度聚乙烯（LDPE）为支撑基体，开发了具有高储能密度、优异阻燃性和有效抑烟性能的形态稳定相变材料（FSPCMs）。为了进一步提高阻燃性，引入了聚磷酸铵（APP）和季戊四醇（PER）作为增效阻燃剂。优化后的FSPCMs （60 wt% BO, 27 wt% LDPE, 3 wt% EG， 6 wt% APP和3 wt% PER）表现出出色的性能，潜热为122.6 J/g，极限氧指数（LOI）为23.3% （UL-94 V-0额定值），产烟率降低78.5%，烟密度降低68.3%，光热转换效率降低77.2%。系统分析了BO的分子结构，揭示了其对相变行为和阻燃性能的重要影响。硼酸接枝策略显著增强了BO的成炭能力，阐明了其协同阻燃和抑烟机理。开发的FSPCMs有望应用于能源存储和安全关键应用。

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来源期刊

Polymer Testing 工程技术-材料科学：表征与测试

CiteScore

10.70

自引率

5.90%

发文量

328

审稿时长

44 days

期刊介绍： Polymer Testing focuses on the testing, analysis and characterization of polymer materials, including both synthetic and natural or biobased polymers. Novel testing methods and the testing of novel polymeric materials in bulk, solution and dispersion is covered. In addition, we welcome the submission of the testing of polymeric materials for a wide range of applications and industrial products as well as nanoscale characterization. The scope includes but is not limited to the following main topics: Novel testing methods and Chemical analysis • mechanical, thermal, electrical, chemical, imaging, spectroscopy, scattering and rheology Physical properties and behaviour of novel polymer systems • nanoscale properties, morphology, transport properties Degradation and recycling of polymeric materials when combined with novel testing or characterization methods • degradation, biodegradation, ageing and fire retardancy Modelling and Simulation work will be only considered when it is linked to new or previously published experimental results.