Water-Soluble Self-Doped Conducting Polyaniline Copolymer
Water-Soluble Self-Doped Conducting Polyaniline Copolymer
复制标题
水溶性自掺杂导电聚苯胺共聚物
DOI：
10.1021/ma991626g
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
E. Ruckenstein
中科院分区：
文献类型：
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作者：
W. Yin;E. Ruckenstein
聚苯胺（PANI）因其环境稳定性好、成本低、与酸掺杂后电导率高而成为一种重要的导电聚合物。1,2合成水溶性导电聚苯胺的方法包括将水溶性官能团附着在苯环上或用水溶性官能团取代苯胺的NH基团。Yue和epstein3,4利用祖母绿碱与发烟酸反应合成了磺酸环取代聚苯胺（SPAN），电导率为0.1-1 S/cm。然而，所得到的聚合物只有在与碱性水溶液解包后转化为盐态后才可溶于水。用磷酸取代磺酸基得到另一种水溶性自掺杂环取代聚苯胺，但其电导率较低，为10-3 S/cm。5 Hany等人6试图通过祖母绿碱与丙烷磺酮或丁烷磺酮反应来合成自掺杂聚苯胺。然而，该产物具有非常低的溶解度和低电导率（~ 10-9 S/cm）。通过后一种方法的一种变体，将祖母绿碱先与钠反应，再与丙烷磺酮反应，合成了n取代的水溶性自掺杂聚苯胺，聚（苯胺-共丙磺酸苯胺）[PAPSAH]。PAPSAH可以直接从其水溶液中浇铸成独立薄膜，并且在没有外部掺杂的情况下提供约10-2 S/cm的电导率。制备n取代水溶性自掺杂导电聚苯胺的另一种方法是将苯胺与合适的取代苯胺共聚生成共聚物。由此获得的共聚物在NH4OH水溶液中表现出改善的溶解度；8但其电导率较低（10-3 S/cm）。综上所述，上述方法通过修饰祖母绿碱的结构合成了水溶性自掺杂聚苯胺。我们合成了一种新的水溶性自掺杂共聚物聚苯胺-co-2-丙烯酰胺-2-甲基-1-丙磺酸[PAMPANI]及其盐。PAMPANI和它的盐都可以溶解在水中，并从它们的水溶液中形成薄膜。
Polyaniline (PANI) has emerged as an important conducting polymer because of its good environmental stability, low cost, and high conductivity upon doping with acid. 1, 2 The methods proposed to synthesize watersoluble conducting polyaniline involved either the attachment of water-soluble functional groups to its benzene rings or the replacement of in the NH groups of PANI by water-soluble functional groups. Yue and Epstein3, 4 have synthesized sulfonic acid ring-substituted PANI (SPAN) by reacting the emeraldine base with fuming acid and obtained a conductivity of 0.1-1 S/cm. However, the polymer obtained became watersoluble only after its conversion to the salt form after undoping with a basic aqueous solution. The replacement of the sulfonic acid group with phosphoric acid yielded another water-soluble self-doped ring-substituted PANI, which exhibited, however, the low conductivity of 10-3 S/cm. 5 Hany et al. 6 attempted to synthesize a self-doped PANI by reacting the emeraldine base with propane sultone or butane sultone. However, the product had both a very low solubility and low conductivity (∼ 10-9 S/cm). Through a variant of the latter method, an N-substituted water-soluble self-doped PANI, poly-(aniline-co-propanesulfonic acid aniline)[PAPSAH], was synthesized by reacting the emeraldine base first with NaH and subsequently with propane sultone. PAPSAH could be cast into free-standing films directly from its aqueous solution and provided a conductivity of about 10-2 S/cm without external doping. 7 Another approach for the preparation of N-substituted water-soluble selfdoped conductive PANI was the copolymerization of aniline with a suitable substituted aniline to generate copolymers. The copolymer thus obtained exhibited improved solubility in an aqueous NH4OH solution; 8 however, its conductivity was low (10-3 S/cm). In conclusion, the above approaches synthesized watersoluble self-doped polyanilines by modifying the structure of the emeraldine base.A new water-soluble self-doped copolymer, namely, poly (aniline-co-2-acrylamido-2-methyl-1-propanesulfonic acid,[PAMPANI]), and its salt have been synthesized by us. Both PAMPANI and its salt could be dissolved in water and cast into films from their aqueous solutions.