疏水改性纳米氧化镁对短氟碳链泡沫性能影响
Effect of hydrophobic modified magnesium oxide nanoparticles on the properties of short fluorocarbon chain foam
欧红香 1闵政 1薛洪来 1曹海珍 1毕海普 1王钧奇2
作者信息
- 1. 常州大学安全科学与工程学院,江苏 常州 213164
- 2. 江苏锁龙消防科技股份有限公司,江苏 泰州 225753
- 折叠
摘要
为了解决短氟碳链泡沫稳定性差的缺点,采用硬脂酸对氧化镁纳米颗粒(MNPs)疏水改性得到不同水接触角的G-MNPs,研究疏水改性MNPs对短氟碳链泡沫性能和灭火性能的影响.采用硬脂酸对MNPs分别改性60min、90min、120min和150min,测试了G-MNPs表面形态、粒径分布、疏水性、热稳定性以及溶液分散度,研究了疏水改性对泡沫稳定性、发泡能力、泡沫粗化、灭火性能和抗烧性能等的影响.结果表明,硬脂酸疏水改性时间为120min时,改性MNPs水接触角最大,达到138.4°;G-MNPs表面形貌粗糙度增加,颗粒粒径增大,高温下热稳定性良好;疏水改性对泡沫溶液表面张力和黏度几乎没有影响;疏水角为90.0°时,G-MNPs泡沫溶液发泡性能、稳定性能、灭火性能、抗烧性能达到最佳.
Abstract
In order to solve the problem of poor stability of short fluorocarbon chain foam,G-MNPs with different water contact angles were obtained by hydrophobic modification of magnesium oxide nanoparticles(MNPs)with stearic acid.The effects of hydrophobic modified MNPs on the performance and fire extinguishing performance of short fluorocarbon chain foam were studied.MNPs were modified by stearic acid for 60min,90min,120min and 150min,respectively.The surface morphology,particle size distribution,hydrophobicity,thermal stability and solution dispersion of the modified MNPs were tested.The effects of hydrophobic modification on foam stability,foaming ability,foam coarsening,fire extinguishing performance and burning resistance were studied.The results showed that when the hydrophobic modification time of stearic acid was 120min,the water contact angle of modified MNPs was the largest,reaching 138.4°.The surface roughness of the modified MNPs increased,the particle size increased,and the thermal stability was good at high temperature.Hydrophobic modification had little effect on the surface tension and viscosity of the foam solution.When the hydrophobic angle was 90.0°,the foaming performance,stability,fire extinguishing performance and burning resistance of the modified MNPs foam solution were the best.
关键词
硬脂酸/疏水改性/纳米氧化镁/短氟碳链泡沫/灭火性能Key words
stearic acid/hydrophobic modification/magnesium nano oxide particles(MNPs)/short fluorocarbon chain foam/fire extinguishing performance引用本文复制引用
基金项目
国家自然科学基金(22378028)
国家自然科学基金(21878026)
江苏省高等学校基础科学(自然科学)研究面上项目(22KJB620002)
江苏省高等学校基础科学(自然科学)研究面上项目(23KJD530001)
2021年江苏省科技副总项目(FZ20211438)
2021年江苏省研究生工作站项目(2021-187)
出版年
2024
国家科技期刊平台
NSTL
万方数据