层状双金属氢氧化物/碳纳米管复合物的制备及在有机溶剂中的分散  

Preparation of Layered Double Hydroxide/Carbon Nanotubes Composite and its Dispersion in Organic Solvents

作　　者：傅华康[1] 叶维娟[1] 刘梦颖[1] 胡极[1] 杜淼[1] 郑强[1] 

机构地区：[1]高分子合成与功能构造教育部重点实验室浙江大学高分子科学与工程学系,杭州310027

出　　处：《高等学校化学学报》2013年第3期538-544,共7页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:51173164,20674072);中央高校基本科研业务费专项基金(批准号:2011QNA4025)

摘　　要：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.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 interlayer 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 ethanolxylenetetrahydrofuran.

关 键 词：层状双金属氢氧化物 碳纳米管 复合物 剥离 

分 类 号：O614[理学—无机化学]