Sakunpongpitiporn Phimchanok, Phasuksom Katesara, Paradee Nophawan, Sirivat Anuvat
The Conductive and Electroactive Polymers Research Unit, The Petroleum and Petrochemical College, Chulalongkorn University Bangkok 10330 Thailand
Department of Chemistry, Faculty of Science, King Mongkut's University of Technology Thonburi Bangkok 10140 Thailand.
RSC Adv. 2019 Feb 21;9(11):6363-6378. doi: 10.1039/c8ra08801b. eCollection 2019 Feb 18.
Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) nanoparticles in powder form with high electrical conductivity were synthesized chemical oxidative polymerization. In addition, the effects of EDOT : PSS weight ratio, EDOT : NaSO mole ratio, and surfactant concentration and type, namely hexadecyltrimethylammonium bromide (CTAB), sodium dodecylsulfate (SDS), and polyoxyethylene octyl phenyl ether (Triton X-100) on the properties of PEDOT:PSS were investigated. For the effect of EDOT : PSS weight ratio, at the EDOT : NaSO mole ratio of 1 : 1, the EDOT : PSS weight ratio of 1 : 11 was the optimal condition to obtain electrical conductivity of 999.74 ± 10.86 S cm due to the high amount of PSS and SO available to interact with the PEDOT chain with a low % PSSNa. For the effect of EDOT : NaSO mole ratio, at the EDOT : PSS weight ratio of 1 : 11, the EDOT : NaSO mole ratio of 1 : 2 was the best condition as it provided the highest dopant (PSS and SO ) amount, while the % PSSNa was relatively low. For the effect of surfactant type and concentration, at the EDOT : PSS weight ratio of 1 : 11 and EDOT : NaSO mole ratio of 1 : 2, Triton X-100 at 2.5CMC provided electrical conductivity higher than with CTAB and SDS. The thermal stability of PEDOT:PSS obtained from various conditions was investigated, and PEDOT:PSS without surfactant showed the highest thermal stability since it produced the highest char yield. In this study, the highest electrical conductivity of PEDOT:PSS, which was obtained in the presence of Triton X-100 to reduce the PSSNa amount, was 1879.49 ± 13.87 S cm, the highest value reported to date.
通过化学氧化聚合法合成了具有高电导率的粉末状聚（3,4 - 乙撑二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT:PSS）纳米颗粒。此外，还研究了3,4 - 乙撑二氧噻吩（EDOT）与聚苯乙烯磺酸钠（PSS）的重量比、EDOT与硫酸钠（Na₂SO₄）的摩尔比以及表面活性剂的浓度和类型（即十六烷基三甲基溴化铵（CTAB）、十二烷基硫酸钠（SDS）和聚氧乙烯辛基苯基醚（Triton X - 100））对PEDOT:PSS性能的影响。对于EDOT与PSS重量比的影响，在EDOT与Na₂SO₄摩尔比为1:1时，EDOT与PSS重量比为1:11是获得999.74±10.86 S/cm电导率的最佳条件，这是由于大量的PSS和SO₄²⁻可与PEDOT链相互作用，且PSSNa的百分比低。对于EDOT与Na₂SO₄摩尔比的影响，在EDOT与PSS重量比为1:11时，EDOT与Na₂SO₄摩尔比为1:2是最佳条件，因为它提供了最高的掺杂剂（PSS和SO₄²⁻）量，而PSSNa的百分比相对较低。对于表面活性剂类型和浓度的影响，在EDOT与PSS重量比为1:11且EDOT与Na₂SO₄摩尔比为1:2时，2.5临界胶束浓度（CMC）的Triton X - 100提供的电导率高于CTAB和SDS。研究了在各种条件下获得的PEDOT:PSS的热稳定性，不含表面活性剂的PEDOT:PSS表现出最高的热稳定性，因为它产生了最高的残炭率。在本研究中，在Triton X - 100存在下以减少PSSNa量获得的PEDOT:PSS的最高电导率为1879.49±13.87 S/cm，这是迄今为止报道的最高值。
