纳米水滑石的表面改性研究  

Study of surface modification on hydrotalcite with aluminum distearate

作　　者：谭琦[1,2] 刘新海[1,2] 李一波[1,2] 刘玉林[1,2] 

机构地区：[1]中国地质科学院郑州矿产综合利用研究所,河南郑州450006 [2]国家非金属矿资源综合利用工程技术研究中心,河南郑州450006

出　　处：《化工矿物与加工》2015年第10期30-33,共4页Industrial Minerals & Processing

基　　金：国家自然科学基金(51404219);地质调查项目(12120113087300)

摘　　要：采用二硬脂酸铝湿法改性纳米水滑石,以活化指数和接触角作为水滑石改性效果的评价指标,分别研究改性温度、改性时间、改性剂用量、初始料浆质量分数等因素对水滑石表面改性效果的影响,并采用FE-SEM、XRD和FT-IR对改性水滑石进行表征。结果表明:改性温度为80℃,改性时间为60min,改性剂用量为4%,初始料浆质量分数为5%时,改性效果最好,改性后纳米水滑石的活化指数和接触角分别达到100%和135°;水滑石经二硬脂酸铝改性后分散性得到提高,且改性剂未破坏水滑石的晶体结构,改性后二硬脂酸铝与水滑石表面既存在化学吸附又存在物理吸附,但主要以化学吸附为主。Surface modification of hydrotalcite was carried out by aluminum distearate.Modification temperature,modification time,surfactant dosage and initial slurry concentration were studied to achieve the optimum conditions.The results showed that under the conditions of modification temperature of 80℃,modification time of 60 min,surfactant dosage of 4% and the initial slurry concentration of 5%,the modification effect of hydrotalcite was the best and the activation index and contact angle of modified hydrotalcite were 100% and 135°respectively.The dispersibility of hydrotalcite was improved by aluminum distearate and the crystal structure of hydrotalcite was not destroyed by modifier.Aluminium distearate resulted in chemical adsorption and physical adsorption on the surface of hydrotalcite.

关 键 词：二硬脂酸铝 水滑石 表面改性 表征 吸附 

分 类 号：TQ314.24[化学工程—高聚物工业] TB332[一般工业技术—材料科学与工程]