苛性条件下纳米氢氧化铝分散和流变研究  

Dispersion and rheology studies on alumina trihydroxide under severe conditions

作　　者：梁磊[1] 郭奋[1] 陈建峰[1] 

机构地区：[1]北京化工大学教育部超重力工程研究中心,北京100029

出　　处：《现代化工》2006年第z1期233-237,240,共6页Modern Chemical Industry

基　　金：国家"863"计划资助项目(2002AA302605)

摘　　要：碳分氢氧化铝悬浮液是黏度极高的时变性非牛顿流体,随固含量增加黏度显著增加,在达到0.14 g/mL后已对搅拌等过程有显著影响。在pH大于12,Na2CO3/NaCl质量分数高达15%和离子浓度高达2.73 mol/L的苛性条件下,对纳米氢氧化铝(ATH)悬浮液进行了分散剂的选择和流变研究。用一种流变方法选择出分散剂,利用分散剂在饱和Na2CO3溶液中,获得固含量高达50%(质量分数)的高浓度氢氧化铝悬浮液,悬浮液黏度理想。Alumina trihydroxide(ATH) suspension from the carbonation is a very sticky time-dependent non-Newtonian fluid and its viscosity increases rapidly as the content of ATH raises and becomes intractable when the content of ATH reaches 0.14 g/mL.The rheology and dipersibility of ATH suspension is investigated under severe conditions of pH value above 12,contents of Na_2CO_3/NaCl about 15 wt%,ion concentration up to 2.73 mol/L.A rheology method is used to select dispersants for the ATH suspension.A concentrated ATH suspension with 50wt% of content is obtained in a solution with pH=12 and =2.7 mol/L,and the viscosity is good.

关 键 词：氢氧化铅悬浮液 苛性条件 分散剂 流变 

分 类 号：TQ314.255[化学工程—高聚物工业] TB126[理学—工程力学]