正硅酸乙酯
沸石
材料科学
表面改性
水解
硅烷
嫁接
核化学
水热合成
化学工程
无机化学
热液循环
催化作用
化学
有机化学
纳米技术
复合材料
聚合物
工程类
作者
Junbo Hou,Qiwang Jiang
出处
期刊:Materials Science Poland
[De Gruyter]
日期:2018-12-01
卷期号:36 (4): 638-643
被引量:2
标识
DOI:10.2478/msp-2018-0083
摘要
Abstract Nanosized NaA zeolite was successfully synthesized by hydrothermal method using tetraethyl orthosilicate (TEOS) and aluminum isopropoxide (AIP) as the main raw materials. The surface modification of NaA zeolite was carried out by silane coupling agent 3-aminopropyltriethoxysilane (KH-550). The effects of silane coupling agent dosage, reaction temperature, reaction time, hydrolysis time and pH value on grafting rate of NaA zeolite were investigated in detail. The zeolites were characterized by XRD, SEM-EDS, FT-IR and TG-DTA. The results showed that the surface of NaA zeolite was modified successfully by KH-550. The optimal modification conditions obtained were as follows: the dosage of coupling agent in 95 % ethanol – 1.6 %, reaction temperature − 70 °C, reaction time – 2 h, hydrolysis time – 20 min, and pH value – 3.5. Under these conditions, the grafting rate of modified NaA zeolite was 3.95 %.
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