Thermal management ability and flame retardancy of silicone rubber foam filled with flame retardant phase change capsules

IF 5.3 2区地球科学 Q2 CHEMISTRY, PHYSICAL

Applied Clay Science Pub Date : 2023-08-01 DOI:10.1016/j.clay.2023.106977

Zetian Zhang , Weining Du , Yang Liu , Ze Liang , Fufen Li , Yong Yong , Zhengjun Li

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引用次数: 1

Abstract

A novel phase change capsule with layered double hydroxide (LDH) modified SiO₂ shell (named M-EPCM) was designed and prepared, which was used to improve the thermal regulation performance and flame retardancy of silicone rubber foam (SRF). The SRF-3 composite containing 18 wt% M-EPCM presented greatly improved thermoregulation ability, and excellent thermal reliability even after 100 cycles. Besides, SRF-3 also exhibited excellent flame retardancy, with the limiting oxygen index exceeding 31.0%, reduced peak heat release rate (36.4%) and low total smoke yield (13.8 m²). The flame retardant mechanism analysis revealed that barrier effect, catalytic crosslinking and polyaromatic reaction provided by LDH played an important role. Moreover, SRF composites have outstanding mechanical properties, especially SRF-3 which showed a 150% and 85% increase in tensile strength and compression strength compared with pure SRF, respectively. This article provides a new idea for further application of LDH in the field of thermal management.

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阻燃相变胶囊填充硅橡胶泡沫的热管理能力和阻燃性

设计并制备了一种层状双氢氧化物(LDH)修饰SiO2外壳的新型相变胶囊(M-EPCM)，用于改善硅橡胶泡沫(SRF)的热调节性能和阻燃性。含有18 wt% M-EPCM的SRF-3复合材料在100次循环后也表现出了极大的热调节能力和优异的热可靠性。此外，SRF-3还表现出优异的阻燃性能，极限氧指数超过31.0%，峰值放热率降低36.4%，总产烟量低(13.8 m2)。阻燃机理分析表明，LDH提供的阻隔效应、催化交联和多芳反应起了重要作用。此外，SRF复合材料具有优异的力学性能，特别是SRF-3的抗拉强度和抗压强度分别比纯SRF提高了150%和85%。本文为LDH在热管理领域的进一步应用提供了新的思路。

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来源期刊

Applied Clay Science 地学-矿物学

CiteScore

10.30

自引率

10.70%

发文量

289

审稿时长

39 days

期刊介绍： Applied Clay Science aims to be an international journal attracting high quality scientific papers on clays and clay minerals, including research papers, reviews, and technical notes. The journal covers typical subjects of Fundamental and Applied Clay Science such as: • Synthesis and purification • Structural, crystallographic and mineralogical properties of clays and clay minerals • Thermal properties of clays and clay minerals • Physico-chemical properties including i) surface and interface properties; ii) thermodynamic properties; iii) mechanical properties • Interaction with water, with polar and apolar molecules • Colloidal properties and rheology • Adsorption, Intercalation, Ionic exchange • Genesis and deposits of clay minerals • Geology and geochemistry of clays • Modification of clays and clay minerals properties by thermal and physical treatments • Modification by chemical treatments with organic and inorganic molecules(organoclays, pillared clays) • Modification by biological microorganisms. etc...