Efficient Ultrasonic-Assisted Preparation of Nano-Mg(OH)2 to Enhance Polydimethylsiloxane Composite Flame Resistance

IF 2.7 3区 化学 Q2 POLYMER SCIENCE
Yuemiao Zhang, Kun Wu, Junxi Wan, Jun Shi
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引用次数: 0

Abstract

In this innovative study, an ultrasonic-enhanced continuous-flow method is introduced for one-step synthesis of hydrophobic hexagonal nano-magnesium hydroxide (MH(nm)). Distinct from traditional heating, it shortens reaction time remarkably and has an excellent higher selectivity (purify MH efficiently). The MH(nm) particles present the optimal polydispersity index (PDI) of 0.368, a 218.75% decrease over commercially available MH(μm) particles. Benefiting from the synergistic outcome between the unique physical effect of nanomaterials and the ultrasonic cavitation phenomenon, the polydimethylsiloxane (PDMS) nanocomposites (SS@MH(nm)/PDMS) with MH(nm) modified by sodium stearate (SS@MH(nm)) present excellent thermal conductivity and hydrophobicity. When 30% SS@MH(nm) and 30% SS@MH(μm) are added to PDMS nanocomposites, 30% SS@MH(nm)/PDMS shows a thermal conductivity of 0.4568 W m−1 K−1, 28.35% higher. Its contact angle is 129.47°, 41.27% larger. THR and SPR decrease by 10.49% and 38.45%, respectively. This work provides a simple, green, and efficient process for the preparation of hexagonal MH(nm) with an ortho-hexagonal shape and uniform distribution, and prevents PDMS combustion-property degradation in humidity, offering high-performance flame-retardant materials for humid-environment electrical equipment, with great application potential.

超声辅助制备纳米mg (OH)2增强聚二甲基硅氧烷复合材料的阻燃性
本文介绍了超声增强连续流法一步合成疏水六方纳米氢氧化镁(MH(nm))的方法。与传统的加热法相比,它显著缩短了反应时间,并具有较高的选择性(能有效地提纯MH)。MH(nm)颗粒的最佳多分散性指数(PDI)为0.368,比市售的MH(μm)颗粒降低了218.75%。利用纳米材料独特的物理效应和超声空化现象的协同作用,硬脂酸钠(SS@MH(nm))改性MH(nm)的聚二甲基硅氧烷(PDMS)纳米复合材料(SS@MH(nm)/PDMS)具有优异的导热性和疏水性。当PDMS纳米复合材料中添加30% SS@MH(nm)和30% SS@MH(μm)时,30% SS@MH(nm)/PDMS的导热系数为0.4568 W m−1 K−1,提高28.35%。接触角为129.47°,增大41.27%。THR和SPR分别下降10.49%和38.45%。本工作提供了一种简单、绿色、高效的制备正六边形、均匀分布的MH(nm)的工艺,防止了PDMS在潮湿环境下燃烧性能的退化,为潮湿环境下的电气设备提供了高性能阻燃材料,具有很大的应用潜力。
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
Journal of Applied Polymer Science
Journal of Applied Polymer Science 化学-高分子科学
CiteScore
5.70
自引率
10.00%
发文量
1280
审稿时长
2.7 months
期刊介绍: The Journal of Applied Polymer Science is the largest peer-reviewed publication in polymers, #3 by total citations, and features results with real-world impact on membranes, polysaccharides, and much more.
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