硅烷偶联剂KH 570对电气石表面改性条件优化与表征

Optimization and Characterization of Surface Modification of Tourmaline by Silane Coupling Agent KH 570

以KH 570为改性剂,采用湿法改性的方法,在中性条件下对电气石进行表面改性,以改性产物的接触角和吸油值为参数,对改性的工艺条件进行了优化。结果表明,在改性剂KH 570用量为0.12 mL/g、醇水比为1:5时,在90℃下与10 g电气石反应2 h得到具有优良疏水性能的改性电气石,其接触角为93接。采用IR、XRD、SEM对改性电气石的结构与形貌进行了表征,结果表明,电气石经过改性后,表面成功地接入了含有双键的有机链,改性前后电气石的晶体结构没有发生变化,而改性后电气石的团聚现象大大降低,分散性增加。

The surface modification of tourmaline was carried out under neutral wet modification by KH570 as a modifier.The modifying process conditions were optimized with parameters of the contact angle and oil absorption value of the modified product.As a result,when 0.12 mL/g KH 570 reacted with 10 g tourmaline at 90℃for 2 h at the ratio of alcohol to water of 1:5,the modified tourmaline had excellent hydrophobic properties,and the contact angle was 93°.The structure and morphology of the modified tourmaline were characterized by IR,XRD and SEM.The results showed that the organic chain containing double bonds was successfully connected to the surface of tourmaline,the crystal structure of the tourmaline did not change after modification,and the agglomeration of tourmaline particles was greatly reduced and the dispersion increased.