摘要
有机胺改性膨润土的实验表明,分子长链间的疏水相互作用使层间摩尔吸附量q(org)显著增加,有效撑开了膨润土的层间距。增加水溶液的酸含量可明显促进吸附量和层间距的增大,在溶液中硫酸摩尔数n(H2SO4)与有机胺摩尔数n(AM)的比值n(H2SO4)/n(AM)=0.92时,十二胺、十六胺、十八胺的摩尔吸附量q(org)分别为0.572、1.50和1.69 mmol/g,层间距d分别为2.21、2.51和2.58 nm,明显比未改性膨润土的0.250 nm撑大得多。
The experimental results about the aliphatic amine modified bentonnites show that the hydrophobic interaction between the alkyl chains obviously increases the molar adsorption quantities q（org） of the aliphatic amine in the domain between the layers of bentonnite and effectively expands the distance d between the layers. The q （org） and d increase with increasing acid content in the solutions. When the molar ratio of sulfuric acid to aliphafic amine in solution is fixed to be 0. 92, q（org） s of dodecylamine, hexadeeylamine and octadecylamine are 0. 572, 1.50 and 1.69 mmol/g, and d＇s are 2.21,2.51 and 2. 58 nm, respectively. The latter values are much larger than that of Na-bentonnite （d = 0. 250 nm）.
出处
《应用化学》
CAS
CSCD
北大核心
2005年第9期967-970,共4页
Chinese Journal of Applied Chemistry
基金
福建省教育厅重点资助项目(JA01003)
关键词
膨润土
脂肪胺
有机化改性
bentonnite, aliphatic amine, organic modification
