Layered double hydroxide ( LDH) /carbon nanotubes ( CNTs) composites were prepared by urea method in the aqueous suspension of CNTs. Effect of CNTs concentration on the morphologies and structures of LDH/CNTs composites was investigated in detail. The results showed that in the case of low ( ＜0. 2 g/L) or very high ( ＞4. 0 g/L) CNTs concentration, there was a fairly wide size distribution for the LDH particles in LDH/CNTs while distributes uniformly relatively in the region of 0. 2-4. 0 g/L. The introduction of CNTs has a little influence on the size and structure of LDH crystals. By means of decarbonation treatment and further ion-exchange using surfactant sodium dodecylbenzene sulfonate ( SDBS) , the LDH/CNTs composites with in-terlayer anion of dodecylbenzene sulfo-group ( DBS-LDH/CNTs) were obtained. Then the DBS-LDH/CNTs composites were dispersed in several organic solvents, respectively. The results revealed that the suspension of DBS-LDH/CNTs in 1 -butanol, ethanol and xylene kept stable in a long duration while sedimentated quickly in tetrahydrofuran. In addition, the delamination extent for LDH in these solvents ranked as follows; 1-butanol ＞ ethanol ＞xylene ＞tetrahydrofuran.%通过硝酸处理在碳纳米管(CNTs)表面生成了羧基(-COOH)基团,随后采用尿素法在其水悬浮液中原位合成了层状双金属氢氧化物(LDH),获得了层状双金属氢氧化物/碳纳米管复合物(LDH/CNTs),考察了CNTs用量对LDH形貌与结构的影响.结果表明,CNTs的用量对LDH的产率及结构无显著影响；但当CNTs用量较低(＜0.2 g/L)或过高(＞4.0 g/L)时,会导致LDH的粒径分布变宽.对LDH/CNTs进行氯化及有机化处理,获得了十二烷基苯磺酸根离子(DBS)插层的DBS-LDH/CNTs.对DBS-LDH/CNTs在不同有机溶剂中分散及剥离程度的研究发现,DBS-LDH/CNTs在丁醇、乙醇及二甲苯中均可良好分散且其悬浮液较稳定,LDH在不同溶剂中的剥离程度为丁醇＞乙醇＞二甲苯＞四氢呋喃.
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