| 超声辅助沉淀法制备疏水性纳米SiO2 |
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| 引用本文： | 宋英泽,宋丽贤,卢忠远,芦艾,王杰,周浩.超声辅助沉淀法制备疏水性纳米SiO2[J].人工晶体学报,2012,41(2):474-478. |
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| 作者姓名： | 宋英泽 宋丽贤 卢忠远 芦艾 王杰 周浩 |
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| 作者单位： | 1. 四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地,绵阳,621010
2. 四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地,绵阳621010;中国工程物理研究院化工材料研究所,绵阳621900 |
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| 基金项目： | 绵阳市科技局项目科技攻关项目，西南科技大学先进建筑材料重点实验室培育项目 |
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| 摘 要： | 采用超声沉淀法制备出SiO2纳米粉体,利用硅烷偶联剂γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH-570)对其进行了表面改性,并利用红外光谱(FT-IR)、热重(TG)、接触角、透射电镜(TEM)等方法对SiO2的结构和性能进行了表征,并研究了KH-570用量和改性时间对SiO2活化指数的影响。结果表明:与普通搅拌相比,超声更利于纳米SiO2的制备和改性。超声条件下,KH-570成功接枝到SiO2纳米粒子的表面。且改性后的SiO2疏水性提高,在无水乙醇中的分散状态得到明显改善。当改性剂用量为6 mL,改性时间为1 h时,SiO2纳米粒子的活化指数达到100%。
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| 关 键 词： | 纳米SiO2 超声辅助沉淀法 改性时间 活化指数 |
Preparation of Hydrophobic Nano-SiO2 by Ultrasound-assisted Precipitation Method |
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| SONG Ying-ze
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SONG Li-xian
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LU Zhong-yuan
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LU Ai
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WANG Jie
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ZHOU Hao.Preparation of Hydrophobic Nano-SiO2 by Ultrasound-assisted Precipitation Method[J].Journal of Synthetic Crystals,2012,41(2):474-478. |
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| Authors: | SONG Ying-ze SONG Li-xian LU Zhong-yuan LU Ai WANG Jie ZHOU Hao |
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| Institution: | 1 (1.State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials,Mianyang 621010,China;2.Institute of Chemical Materials of CAEP,Mianyang 621900,China) |
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| Abstract: | In this paper,nano-silica particles were prepared by ultrasound-assisted precipitation method,and were modified by silane coupling agent KH-570.The structure and properties of silica were characterized by FTIR,TG,contact angel and TEM.The effects of content of KH-570 and modification time on activation index of silica were studied.The result showed that compared with normal stirring,ultrasound was more conducive to preparation and modification of silica.Under the ultrasound condition,KH-570 was successfully grafted to the surface of silica nano-particles.After modification,silica were rendered better hydrophobic and the dispersion significantly improved.The activation index of silica reached 100% when the content of KH-570 was 3 mL and the modification time was 1 h. |
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| Keywords: | nano-silica ultrasound-assisted precipitation method modification time activation index |
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