聚丙烯腈纤维亲油改性及其对沥青增强作用研究
Study on Oleophilic Modification of Polyacrylonitrile Fiber and Its Enhancement Effects on Asphalt
顾戚惠 1杨帆 1王海楼 1冯文宣 1魏发云 2张伟1
作者信息
- 1. 南通大学 纺织服装学院,江苏 南通 226019
- 2. 南通大学 杏林学院,江苏 南通 226236;浙江理工大学 纺织科学与工程学院(国际丝绸学院),浙江 杭州 310018
- 折叠
摘要
为提高聚丙烯腈(PAN)纤维与沥青间的界面强度,采用二乙烯三胺(DETA)对PAN纤维碱处理,用正硅酸乙酯(TEOS)和十六烷基三甲氧基硅烷(HDTMS)对PAN纤维进行表面改性,以改善PAN纤维疏水亲油的特性,进而提高纤维和沥青间的界面性能.研究改性温度、时间及HDTMS质量对PAN纤维断裂强力和疏水性的影响;通过扫描电镜(SEM)和傅立叶红外光谱(FTIR)对改性前后的纤维的表面形貌和化学结构进行表征,借助纤维拉拔测试分析了改性前后的纤维与沥青的界面强度.结果表明:改性工艺对PAN纤维的断裂强力影响不大,加入 75 mg的HDTMS在70℃下反应1 h得到的改性PAN纤维接触角最大,与原纤维相比,改性后的纤维的吸油率提高了27.0%,纤维与沥青基体的拉拔强力提高了12.6%.
Abstract
In order to improve the interface strength between polyacrylonitrile(PAN)fiber and asphalt,the PAN fiber was alkali-treated with diethylenetriamine(DETA),and then surface-modified with tetraethoxysilane(TEOS)and cetyltrimethoxysilane(HDTMS)to improve the hydrophobic and oleophilic properties of PAN fiber and then foster the interface properties of the fiber and asphalt.The effects of modifying temperature,time and the quality of HDTMS on the breaking strength and hydrophobicity of PAN fibers were studied.The surface mor-phology and chemical structures of PAN fibers before and after modification were characterized through scanning electron microscopy(SEM)and fourier transform infrared spectrometer(FT-IR).The changes of interface strength between fiber and asphalt were analyzed by fiber pull-out test before and after modification.The results showed that the modification process had little effect on the breaking strength of PAN fiber.The contact angle of modified PAN fiber was the largest when 75 mg HDTMS was added at 70℃for 1 h.Compared with the original fiber,the oil absorption rate of modified PAN fiber increased by 27.0%,and the pull strength between the fiber and the asphalt matrix increased by 12.6%.
关键词
PAN纤维/亲油改性/沥青/界面/增强Key words
PAN fiber/oleophilic modification/asphalt/interface/enhancement引用本文复制引用
出版年
2025
国家科技期刊平台
NSTL
万方数据