Overview
Polyaniline (PANI) is one of the most studied conductive polymers due to its environmental stability, tunable conductivity, and cost-effectiveness. Discovered in the 19th century, it gained prominence in the 1980s for its reversible oxidation states (leucoemeraldine, emeraldine, and pernigraniline). Its synthesis typically involves oxidative polymerization of aniline under acidic conditions. PANI's conductivity arises from protonic acid doping, achieving up to 10 S/cm in its emeraldine salt form. Unlike metals, its conductivity is coupled with lightweight and flexibility, making it ideal for hybrid materials and smart coatings.
Physical and Chemical Properties
Polyaniline exists in three oxidation states, with emeraldine being the most technologically useful. Its conductivity is pH-dependent and can be reversibly switched between insulating and conductive forms. The polymer is thermally stable up to ~200°C but decomposes at higher temperatures without melting. Key characteristics include its ability to form stable dispersions in organic solvents and compatibility with substrates like textiles, metals, and plastics. The doped form (emeraldine salt) exhibits paramagnetic behavior, while the base form is diamagnetic.
Main Applications
PANI is widely used in antistatic coatings for electronics packaging and textiles, where it dissipates static charges without metal-based additives. In corrosion protection, PANI-containing primers form passive oxide layers on steel, notably in marine environments. Its electrochemical properties enable use in rechargeable batteries, supercapacitors, and sensors (e.g., gas detectors). Emerging applications include electrochromic devices, where PANI films change color with voltage, and flexible electrodes for biomedical implants.
Safety and Storage
As a fine powder, PANI poses inhalation risks; handling requires NIOSH-approved dust masks and ventilation. It's generally non-flammable but may decompose under extreme heat, releasing nitrogen oxides. Storage in sealed containers under argon or nitrogen prevents oxidation. Doped PANI is acidic (pH ~2–4) and may irritate skin—gloves and goggles are recommended. Waste disposal should follow local regulations for synthetic polymers. Compatibility testing is advised when combining PANI with other chemicals due to its redox activity.
B2B Procurement Guide
Industrial buyers should prioritize specifications such as conductivity range (e.g., 10⁻³ to 10 S/cm), doping agent (e.g., HCl, DBSA), and particle size (nanoscale vs. micronized). Bulk purchases (100+ kg) often reduce costs by 15–30%. Reliable suppliers provide material safety data sheets (MSDS) and conductivity test reports. For coatings, request dispersion stability data; for composites, check compatibility matrices. Sample testing is critical—evaluate performance under intended conditions (humidity, temperature, UV exposure).
Related Manufacturers
- 主营：甲基丙烯酸十二酯、甲基丙烯酸十六酯、甲基丙烯酸十八酯、聚苯胺、丙烯酸十二酯、丙烯酸十六酯、丙烯酸十八酯、V50引发剂、偶氮二异丁咪唑啉盐酸盐、N-乙酰己内酰胺、硅烷偶联剂、双马来酰亚胺、马来酸酯、缩水甘油酯、缩水甘油醚、甲基咪唑、N-异丙基丙烯酰胺、金属萃取剂
- 主营：阻燃剂、拉那白、牛儿酮、聚苯胺、海藻糖、热敏蓝、萘磺酸、氯菊酯、硫酸锌、催化剂、杨梅酯、檀香醚、聚醚胺、吸收剂、脂檀油、苍术素、羟钴胺、转移剂、溶剂绿、麝香酮、王浆酸、芬多精、纤维素、新戊酯、王冠醚、遮甜粉
- 主营：聚丙烯酰胺、聚合氯化铝、片碱、聚苯胺、纯碱、硫酸亚铁、磷酸、元明粉、乙二醇、工业盐、次氯酸钠
- 主营：乙酸龙脑酯、聚苯乙烯磺酸钠、乙基黄原酸钾、聚苯胺、2-十一酮
- 主营：有机原料、中间体、香精香料、聚苯胺、催化剂、有机硅、表面活性剂
- 主营：化学品、香精香料、试剂、聚苯胺、中间体、有机硅、橡胶树脂、催化剂、纳米材料
- 主营：杜仲素、对位酯、丙烯酸酯、聚苯胺、二氧化硫脲、乙基麦芽酚、饲料添加剂、油酸基硬脂酸、二苯基硅二醇
- 主营：甘氨酸、水苏糖、阻燃剂、导电态聚苯胺、硫酸锌、硫酸锆、硫酸锂、硫酸锶、硫酸锰、铝酸锌、1680-21-3、牛磺酸、褪黑素、磷酸铁、丙酸铵、苏云金、碳酸镁、麝香酮、肉桂醛、磷酸铝、王浆酸、椰油胺、赖氨酸、增塑剂、浸膏粉、乙氧基
- 主营：导电态聚苯胺、全氟三丁胺、木质素、吉氏色素
- 主营：三硫代碳酸钠、红色素-16、聚乙烯亚胺、聚苯胺、三乙二醇二异辛酸酯、巯基苯并噻唑钠、L-丙交酯、乙交酯、石油酯-T50、多元醇苯甲酸酯、热压敏染料、光稳定剂、高分子降解材料
- 主营：全氟三丁胺、二苄叉山梨醇、六氟丙烯二聚体、聚苯胺、六氟环氧丙烷二聚体、异丙醇铝、纳米勃姆石、二异戊基硫醚、隐色结晶紫、邻菲罗啉
- 主营：聚苯胺、脯氨酸甲酯盐酸盐、苄基三甲基氯化铵
- 主营：聚苯胺、麦芽糖酸、苯氧基环磷腈、甲巯基四氮唑
- 主营：全氟三丁胺、氢化镁、碳纳米管导电浆料、聚苯胺、羟基磷灰石、311-89-7、提取物、树脂、硅烷、萃取剂
- 主营：无水乙醇、乙酸乙酯、磷酸、聚苯胺、甲醇、乙二醇、二氯甲烷、异丙醇、二甲苯、各种化学试剂、化工原料