摘要
以α-环糊精和酸性红G包合物为掺杂剂,三氯化铁为氧化剂,采用无模板自组装法合成了一种新颖的片状微结构聚吡咯.用场发射扫描电镜(FESEM)、傅里叶变换红外光谱仪(FTIR)、X射线衍射仪(XRD)和X射线荧光光谱仪(XRF)对合成的片状聚吡咯的结构形貌进行了表征.结果表明,静置聚合条件下,以α-环糊精和酸性红G包合物为掺杂剂得到的片状聚吡咯的宽度在1～10μm之间,长度在10～20μm之间,厚度大约200 nm.研究了反应温度、吡咯单体和掺杂剂的摩尔比、反应时间对片状聚吡咯形貌的影响,获得了最佳反应条件,同时研究了不同反应条件对得到的聚吡咯的导电率的的影响.并对片状聚吡咯的形成机理进行了探讨.
A novel sheet micro-structure polypyrrole（PPy） was synthesized via a self-assembly method using the inclusion compound of α-cyclodextrin（α-CD） with 5-（acetylamino）-4-hydroxy-3-（phenylazo）-2,7-naphthalenedisulfonic acid（Acid Red G,ARG） as the dopant and FeCl3 as the oxidant.The structures and morphologies of the synthesized sheet PPy were characterized by scanning electron microscopy（SEM）,X-ray diffraction（XRD） and Flourier-transform infrared（FTIR） spectroscopy.The results indicated that these sheet PPy doped with the inclusion compound of α-cyclodextrin with ARG showed 1~10 μm in width,10~20 μm in length and the thickness was about 200 nm under no-stirring condition.At the same time,the influence of temperature,the concentrations of various reactants and reaction time on the morphology of the synthesized sheet PPy was investigated.Based on the research results,the optimized synthesis condition for the PPy tubules was obtained.The best conditions of forming PPy micro-sheet are as follows：the reaction temperature is 5℃,the concentrations of pyrrole,α-cyclodextrin and ARG are 0.31 mol/L,0.067 mol/L and 0.067 mol/L,the reaction time is above 12 h.The formation mechanism of the sheet PPy was also discussed.Characterization results of PPy（the elements and contents,XRF） and the reaction intermediates revealed the formation mechanism of PPy micro-sheet is that the especial aggregation of the complexes of Fe2＋ and α-CD/ARG inclusion compounds was considered as the ＂template＂ in the synthesis process of the micro-sheet PPy.Because of the layer arrangement of α-CD/ARG inclusion compounds,the —SO3H groups of ARG molecules were arranged in one surface of the layer structure.Then this finally induced the polymerization reaction and continuous growth of pyrrole monomers on one surface of the aggregation of the complexes ＂template＂.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2011年第6期645-652,共8页
Acta Polymerica Sinica
基金
国家高技术项目研究与发展计划(863计划
项目号2008AA10Z307)
2009年西安交通大学校长科研基金(基金号08140013)资助
