γ-AlOOH溶胶的粒度和稳定性分析  

SIZE AND STABILITY ANALYSIS OF γ-AlOOH SOL

作　　者：高金良[1] 刘军霞[2] 张德权[2] 李东风[3] 张吉瑞[1] 

机构地区：[1]北京服装学院化工研究所,北京100029 [2]石油大学(北京)重质油加工国家重点实验室,北京102249 [3]北京化工研究院,北京100013

出　　处：《化工科技》2003年第6期16-19,共4页Science & Technology in Chemical Industry

基　　金：中国石油化工集团公司科学研究开发项目(402033)。

摘　　要：采用高灵敏度纳米粒度分析仪,对以SB粉为原料,HNO3为解胶剂制备的γ AlOOH溶胶的粒径分布进行了研究。考察了酸度、浓度、胶解温度对γ AlOOH溶胶的质点大小、粒径分布和稳定性的影响。结果表明,AlOOH溶胶质点的大小随着酸度的降低先呈下降趋势,之后很快上升。当n(H+)∶n(AlOOH)=0.07,溶胶粒度分布最窄;胶体的酸度决定了胶体质点的存在形态,在n(H+)∶n(AlOOH)=0.08～0.1时,AlOOH溶胶稳定;SB粉的质量分数<7%,AlOOH胶粒的粒径随SB粉的质量分数变化不大,AlOOH溶胶稳定,SB粉的质量分数对溶胶的粒度分布影响不明显;在温度高于80℃时,SB粉在HNO3作用下胶解稳定的AlOOH溶胶粒度分布窄,性质稳定。∶On the basis of dynamic light scattering (DLS) principle, the size distribution of γ-AlOOH sol prepared with SB powder as raw material and HNO_3 as dispergator was analyzed using zatasizer 3000 HS PCSV1.4. The influence of preparation conditions, consisting of n(H^+)∶n(AlOOH), quality fraction and dispergation temperature of SB powder, on particle size, size distribution and stability of γ-AlOOH sol was studied. The results showed that the particle size of sol trended to decrease, then increase rapidly with (n(H^+))∶n(AlOOH) increase.The size distribution was narrowest while n(H^+)∶n(AlOOH) was about (0.07). Quality fraction of SB powder almost had nothing to do with particle size and size distribution. Moreover, the size shape depended on acidity of sol. AlOOH sol was stable while n(H^+)∶n(AlOOH) was 0.08 to (0.1) and quality fraction of SB powder was less than 7%. Besides, when dispergation temperature higher than 80℃, AlOOH sol was stable and size distribution was narrow.

关 键 词：γ-AIOOH溶胶 粒度 稳定性 SB粉 动态光散射技术 

分 类 号：O614.31[理学—无机化学] O648.16[理学—化学]