Synthesis and characterization of bicontinuous cubic poly(3,4-ethylene dioxythiophene) gyroid (PEDOT GYR) gels.
Synthesis and characterization of bicontinuous cubic poly(3,4-ethylene dioxythiophene) gyroid (PEDOT GYR) gels.
复制标题
DOI：
10.1039/c4cp04426f
复制
发表时间：
2015-02-21
期刊：
影响因子：
--
通讯作者：
Martin DC
中科院分区：
文献类型：
--
作者：
Cho W;Wu J;Shim BS;Kuan WF;Mastroianni SE;Young WS;Kuo CC;Epps TH 3rd;Martin DC
报道了在具有Ia3̄d(Gyroid，Gyr)对称性的立方聚氧乙烯-10-壬基酚醚(NP-10)模板中制备的双连续立方聚(3，4-乙二氧基噻吩基)(PEDOT)导电聚合物凝胶的合成和表征。EDOT单体在NP-10Gyr相疏水通道中的化学聚合是由AgNO3引发的，AgNO3是一种温和的氧化剂，在紫外线(UV)照射下会被激活。利用光学显微镜和电子显微镜、小角X射线散射(SAXS)、动态力学光谱和电化学阻抗谱(EIS)研究了所得PEDOT凝胶的形貌和物理性质随温度和频率的变化。显微镜和SAXS结果表明，紫外光引发的化学聚合后，PEDOT凝胶保持了有序和稳定的状态，证实了模板法成功地合成了双连续Gyr纳米结构的PEDOT。与未聚合的3，4-乙二氧基噻吩凝胶相相比，PEDOT结构具有更高的储能模数，这可能是由于形成了半刚性的富含PEDOT的纳米通道。此外，PEDOT凝胶的G‘随温度的升高而略有下降，从~1.2×103Pa(10°C)降至~7×104Pa40°C，而NP-10和EDOT凝胶的G’急剧下降，从~5.0×104Pa10°C降至~1.5×102Pa40°C。交流阻抗谱表明，PEDOT凝胶在高频(PEDOT~10~2Ω和EDOT2~3×10~3Ω)和低频(PEDOT 103~105Ω和EDOT~5×10~5Ω，10−~1 Hz)下的阻抗均小于EDOT凝胶。这些结果表明，PEDOT凝胶具有高度的有序性、机械稳定性和导电性，因此应该在这些性能非常重要的应用中受到关注，包括用于生物医学电极的低阻抗和柔顺涂层。
We describe the synthesis and characterization of bicontinuous cubic poly(3,4-ethylenedioxythiophene) (PEDOT) conducting polymer gels prepared within lyotropic cubic poly(oxyethylene)10 nonylphenol ether (NP-10) templates with Ia3̄d (gyroid, GYR) symmetry. The chemical polymerization of EDOT monomer in the hydrophobic channels of the NP-10 GYR phase was initiated by AgNO3, a mild oxidant that is activated when exposed to ultraviolet (UV) radiation. The morphology and physical properties of the resulting PEDOT gels were examined as a function of temperature and frequency using optical and electron microscopy, small angle X-ray scattering (SAXS), dynamic mechanical spectroscopy, and electrochemical impedance spectroscopy (EIS). Microscopy and SAXS results showed that the PEDOT gels remained ordered and stable after the UV-initiated chemical polymerization, confirming the successful templated-synthesis of PEDOT in bicontinuous GYR nanostructures. In comparison to unpolymerized 3,4-ethylenedioxythiophene (EDOT) gel phases, the PEDOT structures had a higher storage modulus, presumably due to the formation of semi-rigid PEDOT-rich nanochannels. Additionally, the G′ for PEDOT gels decreased only modestly with increasing temperature, from ~1.2 × 103 Pa (10 °C) to ~7 × 104 Pa (40 °C), whereas G′ for the NP-10 and EDOT gels decreased dramatically, from ~5.0 × 104 Pa (10 °C) to ~1.5 × 102 Pa (40 °C). EIS revealed that the impedance of the PEDOT gels was smaller than the impedance of EDOT gels at both high frequencies (PEDOT ~102 Ω and EDOT 2 – 3 × 103 Ω at 105 Hz) and low frequencies (PEDOT 103–105 Ω and EDOT ~5 × 105 Ω at 10−1 Hz). These results indicated that PEDOT gels were highly ordered, mechanically stable and electrically conductive, and thus should be of interest for applications for which such properties are important, including low impedance and compliant coatings for biomedical electrodes.
登录
查看更多内容
影响因子：
14
作者：
Green, Rylie A.;Lovell, Nigel H.;Poole-Warren, Laura A.
通讯作者：
Poole-Warren, Laura A.
DOI：
10.1016/0966-7822(94)90032-9
发表时间：
1994-01-01
期刊：
POLYMER GELS AND NETWORKS
影响因子：
--
作者：
GILMORE, K;HODGSON, AJ;WALLACE, GG
通讯作者：
WALLACE, GG
影响因子：
15
作者：
Jaramillo, TF;Baeck, SH;McFarland, EW
通讯作者：
McFarland, EW
影响因子：
3.9
作者：
Fairhurst, CE;Holmes, MC;Leaver, MS
通讯作者：
Leaver, MS
影响因子：
5.5
作者：
Jang, Se Gyu;Kim, Bumjoon J.;Kramer, Edward J.
通讯作者：
Kramer, Edward J.