不同碳链长度的硅烷偶联剂对纳米SiO<sub>2</sub>改性研究

咸春龙; 李钦哲; 柳江砚; 雷鹏; 吴航; 王福会

不同碳链长度的硅烷偶联剂对纳米SiO₂改性研究

咸春龙^1,2,
李钦哲^1,2,
柳江砚^1,2,
雷鹏^1,2,
吴航^1,2, ,,
王福会^1,2

1. 东北大学材料科学与工程学院, 辽宁沈阳 110819;
2. 东北大学沈阳材料科学国家研究中心, 辽宁沈阳 110819

基金项目:

国家自然科学基金项目(U20A20333)

详细信息

作者简介:
咸春龙,男,1993生,硕士研究生,研究方向为涂层的腐蚀与防护。E-mail:1157530265@qq.com

通讯作者:
吴航,男,副教授,硕士生导师。E-mail:wuhang@mail.neu.edu.cn

中图分类号: TQ127.2
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出版历程
- 收稿日期: 2022-03-07
- 网络出版日期: 2023-09-12

Study on Modification of Nano-SiO₂ by Silane Coupling Agent with Different Carbon Chain Lengths

XIAN Chunlong^1,2,
LI Qinzhe^1,2,
LIU Jiangyan^1,2,
LEI Peng^1,2,
WU Hang^1,2, ,,
WANG Fuhui^1,2

1. College of Materials Science and Engineering, Northeastern University, Shenyang 110819, China;
2. Shenyang National Research Center for Materials Science, Northeastern University, Shenyang 110819, China

摘要

摘要: 使用不同碳链长度的硅烷偶联剂(甲基三甲氧基硅烷、丙基三甲氧基硅烷、辛基三甲氧基硅烷、十六烷基三甲氧基硅烷)分别对纳米SiO₂进行改性。采用FTIR、XPS、XRD、TGA等表征方法研究了SiO₂粒子改性前后的化学结构和接枝率;采用激光粒度测试和TEM研究了纳米SiO₂颗粒的粒径分布和微观形貌;采用沉降实验和接触角观察了纳米SiO₂粒子的水中分散性状态及其亲疏水性能。结果表明,硅烷偶联剂成功接枝在了纳米SiO₂颗粒表面。随着硅烷偶联剂碳链长度的增加,改性后SiO₂平均粒径呈现先减小后增大的趋势,团聚现象减弱。经十六烷基三甲氧基硅烷改性的纳米SiO₂颗粒接触角从11.7°提高至108.2°,由亲水性转变为疏水性。
- 硅烷偶联剂 /
- 纳米SiO₂ /
- 接枝改性 /
- 亲疏水性
Abstract: Nano-SiO₂ is modified by silane coupling agents with different carbon chain lengths (methyltrimethoxysilane, propyltrimethoxysilane, octyltrimethoxysilane and cetyltrimethoxysilane). The chemical structure and grafting efficiency of the nano-SiO₂ before and after modification are studied by FTIR, XPS, XRD and TGA. The particle size distribution and micro morphology of nano-SiO₂ particles are studied by laser particle size measurement and TEM. The dispersion and hydrophilic and hydrophobic properties of the nano-SiO₂ particles in water are observed by the sedimentation experiment and contact angle. The results show that the silane coupling agents are grafted on the surface of nano-SiO₂ particles. With the increase of carbon chain length of the silane coupling agent, the average particle size of the modified nano-SiO₂ first decreases and then rises, and the agglomeration phenomenon weakens. The contact angle of the nano-SiO₂ particles modified by cetyltrimethoxysilane increases from 11.7° to 108.2°, the hydrophilic property disappears and the hydrophobic property appears.
- silane coupling agent /
- nano-SiO₂ /
- graft modification /
- hydrophilicity and hydrophobicity

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