硅烷偶联剂表面改性沥青阻燃剂.pdf

第31卷第3期
土木建筑与环境工程
Vol 31 No. 3
2009年6月
Journal of Civil, Architectural & Environmental Engineering
Jun.2009
硅烷偶联剂表面改性沥青阻燃剂
陈辉强,郝培文
(长安大学道路结构与材料交通部重点实验室,西安710064)
摘要:介绍了硅烷偶联剂表面改性沥青阻燃剂的原理和方法,确定了其最佳用量;通过红外光谱、
热重分析等手段,对表面改性前后沥青阻燃剂的结构与性能进行了表征;研究了表面改性前后沥青
阻燃剂的分散效果;对比分析了表面政性对沥青阻燃剂亲油性和亲水性的影响。结果表明,硅烷偶
联剂与沥青阻燃剂发生了明显的物理化学作用,降低了沥青阻燃剂的表面极性,其最佳用量为沥青
阻燃剂的0.95%;表面政性增强了沥青阻燃剂的热稳定性、分散性和亲油性,从而改善了沥青阻燃
剂与沥青的相容性。
关键词:硅烷;沥青阻燃剂;偶联剂;表面改性
中图分类号:TU535文献标志码:A文章编号:1674-4764(2009)03-0136-06
Surface Modification of Fire-retardant Asphalt
with Silane Coupling Agent
CHEN Hui-qiang, HAO Pei-wen
Key Laboratory of Road Structure and Material of Chang'an University, Xi'an 710064, P. R. China
Abstract: The theory and method of asphalt fire retardant surface modified with silane coupling agent is
introduced and the optimum silane dosage is determined. The structure and performance of asphalt fire-
retardant before and after the surface modification is characterized through infrared spectrum and thermo
gravimetric analysis. Dispersion effect of asphalt fire-rctardant before and after the surface modification is
studied and the influence of surface modification on the hydrophilicity and lipophilicity of asphalt fire-
retardant is analysed contrastively. It is shown that obvious physical and chemical action occur between
silane coupling agent and asphalt fire-retardant, which reduce the surface polarity of asphalt fire retardant
with the optimum dosage of 0.95% for the asphalt fire retardant. And Surface modification strengthens the
thermal stability, dispersibility and lipophilicity of asphalt fire-retardant so as to improve compatibility of
asphalt and asphalt fire-retardant
Key words: silanes; asphalt fire-retardant; coupling agent; surface modification
为了实现隧道铺装沥青阻燃的无卤化,环保型青阻燃剂的表面改性来改善其与沥青相容性的研究
的无机类阻燃改性剂成为了首选原材料。然而,无还未见报道。硅烷偶联剂是一种常用的表面改性
机类的阻燃剂存在阻燃效率低、添加量大、极性强以剂,主要用于高分子复合材料中无机填料表面改性
及与沥青相容性差等问题。目前,尽管国内外对并取得了较理想的效果。该文运用表面活性理论,
沥青阻燃技术已经开展了大量研究,但关于通过沥通过采用硅烷偶联剂?对自制的沥青阻燃改性剂进
收稿日期:2009-01-15
基金项目:国家自然科学基金项国(50578016)
作者简介:陈辉强(1974-),男,博士研究生,主要从事隧道与桥梁工程研究,(E-mail)chqlxj@126.com。
郝培文(联系人)·男,教授,博士生导师,(E-mail)haopw(@yahoo.com。