• Macromolecular Research
• /
• 제15권2호
• /
• pp.154-159
• /
• 2007

Polyaniline (PANI) nanospheres, 4 run in diameter, were fabricated by the microemulsion polymerization of octyltrimethyl ammonium bromide (OTAB). The size of the PANI nanoparticles could be controlled as functions of the surfactant concentration, surfactant spacer length and polymerization temperature. The diameter of the PANI nanospheres decreased with increasing surfactant concentration and decreasing temperature. The PANI nanoparticles revealed enhanced conductivity compared to conventional bulk PANIs. In addition, the PANI nanoparticles could be applied as optically transparent conducting materials due to their high conductivity and the nanosize effect. With 9 wt% PANI in the PC matrix, the PANI/PC film exhibited a conductivity of $8.9\times10^{-3}S/cm$ and transparency exceeding 95% over the entire visible light range.

• 공업화학
• /
• 제18권5호
• /
• pp.483-489
• /
• 2007

Polyaniline (PANI)/Polyimide (PI) 혼합막을 제조하여 PANI 함량과 doping처리가 막의 구조적 특성과 기체 분리 특성에 미치는 영향을 연구하였다. NMP를 용매로 하여 6FDA와 ODA를 반응시켜 얻어진 polyamic acid (PAA) 용액과 PANI 용액을 혼합하여 PANI/PI 혼합막을 얻었다. 얻어진 PANI/PI 막을 1M의 HCl 수용액에서 24시간 doping처리하여 doped PANI/PI 혼합막을 제조하였다. 제조한 막은 FT-IR과 XRD 및 TGA에 의하여 구조적 특성을 분석하였고, $30^{\circ}C$와 5 atm에서 압력변화법으로 $H_2$, $O_2$, $CO_2$, $N_2$ 및 $CH_4$에 대한 기체 투과 특성을 조사하였다. PANI/PI 혼합막은 PANI와 PI의 흡수특성을 잘 보여주었고 PANI보다 열적 안정성이 향상되었으며, PANI의 함량이 증가할수록 d-spacing은 감소하였다. PANI/PI 혼합막에서 기체의 투과도계수는 PANI의 함량이 증가함에 따라 감소하였으며 투과도 계수의 크기는 $H_2$ > $O_2$ > $CO_2$ > $N_2$ > $CH_4$의 순서였다. PANI/PI막을 doping처리하면 투과도계수는 감소하나 투과선택도는 향상되었다. 특히 doping한 PANI/PI (75/25)막에서 $H_2/CH_4$의 선택도는 991을 나타내었다.

• 대한화학회지
• /
• 제59권5호
• /
• pp.423-428
• /
• 2015

(1S)-(+)-10-camphorsulfonic acid (CSA) and HCl were used together as a binary dopant in the electrodeposition of polyaniline (PAni). (+)-CSA and HCl were added in different mole ratios (9:1 and 6:4). (+)-CSA-doped and binary-doped PAni exhibited markedly different ultraviolet-visible and circular dichroism spectral characteristics due to differences in their conformations. Distinct helical structures are observed in the scanning electron microscopy images of (+)-CSA-doped PAni. The X-ray diffraction pattern of (+)-CSA-doped PAni exhibited remarkably higher crystallinity than that of HCl-doped PAni which is associated with the helical ordering along the polymer chains. The conformational changes due to the binary doping in chiral PAni had a significant effect on its chiroptical and electrochemical properties, morphology, and crystallinity, thus determined its conductivity.

• 폴리머
• /
• 제24권1호
• /
• pp.29-37
• /
• 2000

메탄올/물의 혼합용매에 아닐린 단량체, 산화제, 도판트 그리고 PEO를 넣어 일정시간 교반한 후, 용액을 캐스팅하여 용매를 증발시켜 전도성 고분자인 폴리아닐린 (PANi)과 열가소성 매트릭스 고분자인 폴리에틸렌옥사이드(PEO)가 혼합된 블렌드를 얻었다. 블렌드 내의 중합된 PANi의 양이 많아질수록 전기전도도가 증가함을 알 수 있었고, PANi의 함유량이 11 wt%만 되어도 전기전도도가 약 0.15 S/cm값을 나타내었다. 교반조 내의 체류시간에 따라 PANi/PEO 블렌드의 형태학이 변함을 관찰하였으며, 이러한 형태학이 전기전도도에 영향을 미침을 알았다. 또한 도판트의 분자크기가 커질수록 제조된 블렌드의 전기전도도가 증가함을 관찰하였다. 매트릭스 고분자로 사용된 PEO 분자량을 변화시키며 블렌드를 제조하였을때, PEO의 분자량이 클수록 제조된 PANi/PEO 블렌드의 전기전도도가 증가함을 관찰하였다.

• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 2001년도 추계학술대회 논문집 Vol.14 No.1
• /
• pp.374-377
• /
• 2001

We have synthesized poly(3-hexylthiophene)(P3HT), which is the most famous conducting polymer and studied the optical properties of P3HT. And then fabricated the device using P3HT as an emitting layer. For the improve of hole injection from ITO electrode to P3HT emitting layer, we use transparent polyaniline(PANI) electrode. In the voltage-current-luminance characteristics of ITO/PANI/P3HT/LiF/Al device which use the PANI film synthesised during 5 cycle, the device turn on at the 2V and the luminance of $218nW/cm^{2}$ obtained at 12V. External quantum efficiency of ITO/PANI/P3HT/LiF/Al increased at 8V than that of ITO/P3HT/LiF/Al device.

• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 2001년도 추계학술대회 논문집
• /
• pp.374-377
• /
• 2001

We have synthesized poly(3-hexylthiophene)(P3HT), which is the most famous conducting polymer and studied the optical properties of P3HT. And then fabricated the device using P3HT as an emitting layer. For the improve of hole injection from ITO electrode to P3HT emitting layer, we use transparent polyaniline(PANI) electrode. In the voltage-current-luminance characteristics of ITO/PANI/P3HT/LiF/Al device which use the PANI film synthesised during 5 cycle, the device turn on at the 2V and the luminance of 218 nW/$\textrm{cm}^2$ obtained at 12V. External quantum efficiency of ITO/PANI/P3HT/LiF/Al increased at 8V than that of ITO/P3HT/LiF/Al device.

• 한국소음진동공학회논문집
• /
• 제18권12호
• /
• pp.1310-1316
• /
• 2008

Bi-layer and tri-layer structures of electro-active paper(EAPap) using conductive polyaniline(PANI) coating were investigated to improve bending displacement of cellulose EAPap. Two different counter ions, perchlorate($CIO_4^-$) and tetrafluoroborate($BF_4^-$), are used as dopant ions in the PANI processing. The actuation performances of hi-layer and tri-layer structure are evaluated in terms of tip displacement, blocked force, strain energy density and power output density. The actuation performance of the tri-layer actuator was better than the hi-layer structure, and the maximum displacement and blocked force of tri-layer $CIO_4^-$ doped-PANI-EAPap were 13.2 mm and 0.15 mN, respectively. Also the power output of the actuator is similar to the required power of biological muscle application.

• Bulletin of the Korean Chemical Society
• /
• 제30권5호
• /
• pp.1097-1100
• /
• 2009

New types of conducting polyaniline-polymannuronate (PANI-PM) composites were synthesized by in situ deposition techniques in an aqueous media. By dissolving different weight percentage of polymannuronate (PM) (5, 10, 15, and 25%), the oxidative polymerization of aniline was carried out using ammonium per sulfate as an oxidant. The obtained composites were studied for their thermal stability and electrochemical behavior. The thermal stability of PANI-PM composites is lower than PANI, which supports a strong interaction between PANI and PM. However, the composites show an appreciable electrochemical behavior. Based on these observation the PANI-PM composites can be explored in different fields such as electric devices, sensors, functional coatings, etc.

• KSTLE International Journal
• /
• 제8권1호
• /
• pp.7-10
• /
• 2007

The rheological property of hollow PANI malonate suspension in silicone oil was investigated by varying the electric fields and shear rates, respectively. The hollow PANI malonate susepnsion showed a typical electrorheological (ER) response caused by the polarizability of an amide polar group and shear yield stress due to the formation of chains upon application of an electric field. The shear stress for the hollow PANI malonate suspension exhibited an electric field power of 0.90. On the basis of the experimental results, the newly synthesized hollow PANI malonate suspension was found to be an anhydrous ER fluid.

• 한국산학기술학회논문지
• /
• 제4권3호
• /
• pp.209-213
• /
• 2003

Polyaniline (PANi) composite particles were synthesized by chemical oxidation polymerization of aniline in presence of poly-n-isopropyl acryl amide (PNIPAM). The PANi particles formed in the reaction medium deposited onto non-conducting PNIPAM template to produce PANi-coated composite particles. The formation of composite was confirmed by FT-IR spectroscopy, and UV-VIS spectroscopy, and their morphological structures were examined by scanning electron microscopy (SEM). From the experimental results, it was determined that PANi was successfully coated onto non-conducting PNIPAM.