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材料导报  2023, Vol. 37 Issue (5): 21090278-8    https://doi.org/10.11896/cldb.21090278
  高分子与聚合物基复合材料 |
海泡石/原位生成氢氧化镁对琼脂基气凝胶的性能影响研究
郭鑫, 苏宏玺, 赵鸿, 欧阳成伟, 强小虎, 黄大建*
兰州交通大学材料科学与工程学院,兰州 730070
Effect of Sepiolite/In-situ Generated Magnesium Hydroxide on the Properties of Agar-based Aerogels
GUO Xin, SU Hongxi, ZHAO Hong, OUYANG Chengwei, QIANG Xiaohu, HUANG Dajian*
School of Materials Science and Engineering,Lanzhou Jiaotong University, Lanzhou 730070, China
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摘要 聚合物气凝胶具有质量轻、隔热效果好等优点,是一种新型的建筑保温材料,然而力学强度低、容易燃烧极大地限制了它的应用与发展。 本工作通过氧化镁水化的方式,在琼脂 (AG)/聚乙烯醇(PVA) 基体中原位生成了氢氧化镁 (MH),并在复合体系中引入海泡石粘土 (SP) 与MH复配,最后利用简单的冷冻干燥方式制备了不同MH、SP负载量的AG/PVA复合气凝胶,并对它们的微观形貌、力学性能以及阻燃性能等进行了测试。 SEM、FTIR结果表明,在AG/PVA的三维多孔骨架中成功原位生成了花簇状MH,SP纤维良好地分散在AG/PVA基体中;MH/SP的引入显著提升了复合气凝胶的力学性能,A-P-M40-S20样品的压缩模量达到2.13 MPa, 相比A-P气凝胶上升了126.60%;阻燃测试中样品A-P的极限氧指数 (LOI) 仅为19.8%,而A-P-M40-S20的LOI值达到了31.6%。
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郭鑫
苏宏玺
赵鸿
欧阳成伟
强小虎
黄大建
关键词:  气凝胶  氢氧化镁  海泡石  原位生成  阻燃    
Abstract: Polymer aerogel is a new type of building insulation material with the advantages of light weight and good thermal insulation effect. However, the low mechanical strength and easy combustion limit its application and development. In this work, magnesium hydroxide (MH) was generated in-situ in the agar (AG)/polyvinyl alcohol (PVA) matrix by magnesium oxide hydration, and sepiolite clay (SP) was introduced into the composite system to compound with MH. Finally, AG/PVA composite aerogels with different MH and SP loadings were prepared by a simple freeze-drying method, and their microstructure, mechanics and flame retardant properties were tested. The results of SEM and FTIR showed that cluster-like MH was successfully formed in-situ in the three-dimensional porous framework of AG/PVA. SP was also well dispersed in AG/PVA matrix; the introduction of MH/SP significantly improved the mechanical properties of the composite aerogel, and the compressive modulus of the A-P-M40-S20 sample was 2.13 MPa, an increase of 126.60% compared to that of the A-P aerogel. In the flame retardant test, the limiting oxygen index (LOI) of sample A-P was only 19.8%, while the LOI of sample A-P-M40-S20 reached 31.6%.
Key words:  aerogel    magnesium hydroxide    sepiolite    in-situ generation    flame retardant
出版日期:  2023-03-10      发布日期:  2023-03-14
ZTFLH:  TB332  
基金资助: 甘肃省自然科学基金科技支撑项目(20JR5RA426 );甘肃省教育厅创新能力提升项目(2019B-064 );临泽县凹凸棒石产业开放课题科技项目(LZKFKT-2103);甘肃省自然科学基金科技计划项目(21JR7RA279)
通讯作者:  *黄大建,兰州交通大学副教授、硕士研究生导师。2002年兰州大学材料化学本科毕业,2012年中国科学院大学物理化学博士毕业。主持及参与国家自然科学青年基金、甘肃省科技重大专项、甘肃省自然科学基金等项目,目前主要从事复合材料、矿物材料等方面的研究工作。发表SCI论文20余篇。huangdj2015@yeah.net   
作者简介:  郭鑫,硕士研究生,2019年毕业于南华大学矿物加工工程专业,现就读于兰州交通大学材料工程专业,主要研究领域为聚合物多孔气凝胶材料的制备及其功能化改性;氢氧化镁阻燃剂、黏土矿物阻燃剂对环境友好高分子材料阻燃改性;生物质基多孔材料用于染料废水处理。
引用本文:    
郭鑫, 苏宏玺, 赵鸿, 欧阳成伟, 强小虎, 黄大建. 海泡石/原位生成氢氧化镁对琼脂基气凝胶的性能影响研究[J]. 材料导报, 2023, 37(5): 21090278-8.
GUO Xin, SU Hongxi, ZHAO Hong, OUYANG Chengwei, QIANG Xiaohu, HUANG Dajian. Effect of Sepiolite/In-situ Generated Magnesium Hydroxide on the Properties of Agar-based Aerogels. Materials Reports, 2023, 37(5): 21090278-8.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.21090278  或          http://www.mater-rep.com/CN/Y2023/V37/I5/21090278
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