十二烷基苯磺酸钠超疏水复合材料.pdf

物理化学学报( Wuli Huaxue Xuebao
March
Acta Phys. -Chim. Sin. 2014, 30(3),583-588
583
Article
doi:10.3866PKU.WHXB201401031
www.whxb.pku.edu.cn
步法合成聚苯十二烷基苯磺酸钠超疏水复合材料
宋根萍夏冬祥
(扬州大学化学化工学院,江苏扬州225002)
摘要:在阴离子表面活性剂十二烷基苯磺酸钠(SDBS)体系中,采用一步法制得聚苯胺SDBS超疏水复合材
料.利用场发射扣描电子显微镜( FESEM)观察产物形貌并测定其元素组成.通过傅里叶变换红外光谱仪、紫外
可见光谱仪、Ⅹ射线衍射等对其结构进行表征,用视频接触角测量仪测定材料的亲疏水性.考察SDBS浓度和
溶液酸度对产物形及疏水性能的影响,探讨疏水机理.结果表明:在pH=1-9,SDBS浓度大于0.016mol-L1
条件下,所制备复合材料的水接触角大于150,SDBS掺杂使得苯胺单体的转化率高达98%,两亲分子SDBS
亲水磺酸基与聚苯胺主链上的亚胺基不仅存在静电引カ,而且能形成磺酰胺键,聚苯胺主链间又以氢键相互连
接,SDBS分子的疏水烃基有序排列朝向聚苯胺主链外侧,从而组装形成具有微纳结构的聚苯胺SDBS超疏水
复合材料.本文结果有利于更好地理解聚苯胺SDBS超疏水性复合材料的形成机理,对超疏水材料的设计提供
新思路.
关键词:超疏水;聚苯胺;一步法;十二烷基苯磺酸钠;复合材料
中图分类号:O647
One-step Preparation of Superhydrophobic Polyaniline/Sodium
Dodecylbenzenesulfonate Composites
SONG Gen-ping
XIA Dong-xiang
(Schoo1 of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, iangsu Province, PR China
Abstract: Superhydrophobic polyaniline( PAN sodium dodecylbenzenesulfonate(SDBS)composites
were fabricated in one-step by the oxidative polymerization of aniline in the presence of SDBS. The
morphology and elemental composition of the PAN/SDBS composite were characterized by field-emission
scanning electron microscopy. The chemica structure was confirmed by Fourier transform-inra
spectroscopy, ultraviolet-visible spectrophotometry, and X-ray powder diffraction. The superhydrophilic and
super drophobic properties of the PAN/SDBS composite were determined from water contact angle
WCA)measurements, and were dependent on SDBS concentration, ph, and composite morphology. The
formation and super ydrophobic mechanism of the PAN/SDBS composite are discussed. The composite
surface had a WCA of 150 at ph 1-9 and SDBS concentration more than 0. 016 molL. SDBS doping
resulted in a 98% conversion of the aniline monomer. The superhydrophobic PAN/SDBS composite
formed from electrostatic int, an sulfamic onding between the hydrophilic -SO, groups of SDBS
and -NH= of PANI chains. Hydrogen bonding existed between N and H atoms among PANI chains. Th
electrostatic interaction and hydrogen bonding immobilized the hydrophilic -SO5 head groups of SDBS
around PANI chains, which resulted in the SDBS hydrophobic alkyl chain protruding. These results aid our
understanding of the formation of superhydrophobic PAN/SDBS composites, and the design of
superhydrophobic materials
Received: September 17, 2013, Revised: January 3, 2014; Published on Web: January 3, 2014
Correspondingauthor.Email:pong@yzu.edu.cn;Tel:+86-514-87976568
The project was supported by the Key Laboratory of Environment Materials and Engineering of Jiangsu Province, China(17375003k11034)
江苏省环境材料和环境工程重点实验室项目(017375003k11034)资助
@Editorial office of Acta Physico-chimica Sinica