• 공업화학
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• 제31권5호
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• pp.539-544
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• 2020

본 연구에서는 넓은 면적의 나노필라 배열 필름을 기반으로 포토 및 소프트 리소그래피 기술과 화학적 희석 고분자 중합을 조절하여 3차원 다공성의 폴리아닐린 필름을 제조하였다. 3차원 폴리아닐린 필름은 계층 간 연결된 폴리아닐린 나노파이버들로 구성되어 있어, 넓은 표면적과 개방형의 다공성 구조를 가지는 3차원 계층형 나노웹 필름을 형성한다. 전기화학분석법을 기반으로 3차원 폴리아닐린 필름이 유연한 pH 센서 전극이 되는 것을 증명하였다. 3차원 폴리아닐린 필름은 이상적인 네른스트 거동과 근접한 60.3 mV/pH의 높은 민감도를 보였다. 또한, 3차원 폴리아닐린 전극은 10 min의 빠른 반응 속도, 우수한 반복성 그리고 높은 선택성을 나타내었다. 3차원 폴리아닐린 전극을 기계적으로 굽힌 상태에서 센서 특성을 측정하였을 때, 전극이 60.4 mV/pH의 높은 민감도를 보여줌으로써, 유연한 pH 센서 성능을 증명하였다.

• Composites Research
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• 제19권5호
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• pp.7-11
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• 2006

SWNT(Single-Walled Carbon Nanotubes)와 도전성 고분자 PANi(Polyaniline)로 구성된 복합재료 합성물질을 제조하여 전기적 기계적 특성을 실험적으로 조사하였다. 이러한 재료는 인공근육 등으로 사용될 수 있어서 미소 인공생물체및 로봇의 구동에 응용될 수 있다. 이 작동기는 90% 순도의 SWNT와 화학적 Polymerization을 이용하여 본 연구실에서 개발된 완전히 새로운 방식으로 제조되었다. 4 탐침 측정법(4-probe method)을 사용하여 이 필름형 복합재 작동기의 전기전도도를 측정한 결과 56.15 S/cm의 값을 나타냈으며, 순수 PANi은 17.38 S/cm를 나타내었다. 순수한 도전성 폴리머 보다 3.2배 높은 전도성을 나타내었다. 이 작동기의 재료적 특성은 SEM을 사용하여 분석하였으며, 우수한 특성을 갖고 있었다. 전압이 작용할 때 변형률을 측정하기 위해서 레이저 측정 센서가 부착된 측정장치가 개발되었으며, $NaNO_3$ 용액 속에서 작동되며, 1볼트의 전압이 가해졌다. 초기 길이 12.690 mm에서 12.733 mm로 늘어났으며, 0.34%의 변형률이 계산되었다. 이 값은 호주 Tahhan의 0.23%보다 48% 정도 높은 변형률이다.

• Steel and Composite Structures
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• 제24권1호
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• pp.15-22
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• 2017

A green biosynthesis method is described for the preparation of Polyaniline (PANI)-cerium dioxide ($CeO_2$) nanocomposites in different media via in-situ oxidative polymerization procedure. The effect of various media including use of HCl, Lemon Juice, Beverage, White Vinegar, Verjuice and Apple vinegar extracts on the particles size, morphology as well as the conductivity of $PANI-CeO_2$ nanocomposites was investigated. The electron-withdrawing feature of $CeO_2$ increases doping level of PANI and enhances electron delocalization. These cause a significantly blue shift of C = C stretching band of quinoid from $1570cm^{-1}$ to $1585cm^{-1}$. The optical properties of the pure material and polymeric nanocomposites as well as their interfacial interaction in nanocomposite structures analyzed by UV-visible spectroscopy. The DC electrical conductivity (${\sigma}$) of as-prepared HCl doped PANI and a $PANI-CeO_2$ nanocomposite measured by a four-probe method at room temperature was studied.

• 한국전기전자재료학회논문지
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• 제14권3호
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• pp.207-214
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• 2001

The conductive polymers, polyaniline (PANI) emeralidin base and 3,4-polyethylene dioxythiophene(PEDOT) were synthesized and coated on the PET film dealt with acryl type primer to study the electromagnetic shielding effectiveness. When both PANI and PEDOT were coated on the PET film dealt with acryl type priemer, their surface properties such as he adhesive increased. For PANI, when blended with the binder such as PMMA, it adhesive and surface hardness increased, too. The visible light transmittance decreased, while the electromagnetic shielding effectiveness increased, when coated thickness of PANI and PEDOT increased. For PANI, the electromagnetic shielding effectiveness increased as its surface resistance decreased. For PANI, when the surface resistance was 140 Ω/$\square$, the shielding effectiveness was found to be 11 dB in the far field, and 13 dB in the near field at 1 GHz. For PEDOT, when the surface resistance was 200 Ω/$\square$, the shielding effectiveness was found to be 3 dB in the far field, and 7dB in the near field.

• 응용화학
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• 제15권1호
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• pp.81-84
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• 2011

Platinum catalyst activity and stability is excellent in terms of fuel cells as a catalyst here. Although it is widely used, to compensate for the high price issue non-precious fuel cell catalysts are being developed. In this study, Co/PANi/CNT composite and non-precious as a catalyst for oxygen reduction was applied. Polyaniline on the interaction between cobalt and the oxygen reduction reaction and the structural characteristics observed in the impact and heat treatment was carried out according to the improved catalytic performance. Potential range is oxygen reduction reaction 0.55 V to 0.78 V(vs. NHE) after pyrolysis. Through this study, Co /PANi/CNT composites as a potential catalyst for fuel cells were non-precious.

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 1998년도 가을 학술발표회논문집
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• pp.219-222
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• 1998

Polyaniline (PANI) has emerged as one of the most promising conducting polymers of the many types of conducting polymers in that it is soluble and therefore processable in the conducting form, and it is both environmentally and thermally stable together with high conductivity when it is doped by functionalized protonic acids like camphorsulfonic acid (CSA) and dodecylbenzenesulfonic acid (DBSA). (omitted)

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 2003년도 The Korea-Japan Joint Symposium
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• pp.93-93
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• 2003

Electrically conducting polyaniline/cyanoethyl resin (PANI/Cyan) blends were prepared by in situ polymerization. The mechanical properties of the blend films increased with increasing cyanoethyl resin and the blend films have moderate conductivity.

• Bulletin of the Korean Chemical Society
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• 제33권4호
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• pp.1247-1252
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• 2012

In this paper, a potentiometric sensor based on polyaniline conducting polymer for potentiometric determination of Cr (VI) ions is reported. Polyaniline was synthesized electrochemically (cyclic voltammetry method) onto a micro pencil graphite electrode (0.7 mm diameter) in the presence of HCl and diphenylcarbazide (termed as (PGE/PAni/DPC). Some initial experiments were performed in order to find out the optimized conditions for preparation of the introduced Cr (VI) sensor electrode. The plot of E vs. log [Cr (VI)], showed a linear response in the range from $1.0{\times}10^{-6}$ to $1.0{\times}10^{-1}$ M. High repeatability with the detection limit of $8.0{\times}10^{-7}$ M was obtained.

• 한국재료학회지
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• 제15권8호
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• pp.543-547
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• 2005

Organic electroluminescence devices were made from 1,4-bis-(9-anthrylvinyl)benzene (AVB) and 1,4-bis-(9-aminoanthryl)benzene (AAB) anthracene derivatives. Device structure was ITO/AVB/PANI(EB)/Al (multi-layer device) and ITO/AAB:DCM/Al(single-layer device). In these devices, AVB, polyaniline(emeraldine base) (PANI(EB)) and AAB were used as the emitting material. 4-(dicyanomethylene)-2-methyl-6-p-(dimethylamino)styryl-4H -pyran(DCM) was used as red fluorescent dopant. We studied change of fluorescence wavelength with concentration of DCM doped in AAB. The ionization potential (IP) and optical band gap (Eg) were measured by cyclic voltammetry and UV-visible spectrum. We compared with difference of emitting wavelength between photoluminescence and electroluminescence spectrum. In case of the multi-layer device, PANI and AVB EL spectra have similar wave pattern to each PL spectrum and when PAM and AVB were used at the same time, and multi-layer device showed that a balanced recombination and radiation kom PANI and AVB. In case of the single-layer device, with the increase of DCM concentration, the blue emission decreases and red emission increases. This indicates that DCM was excited by the energy transfer from AAB to DCM or the direct recombination at the dopant sites due to carrier trapping, or both. The device with $1.0wt\%$ DCM concentration gave white light.

• 방사선산업학회지
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• 제5권3호
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• pp.197-202
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• 2011

In this study, an Ag-polyaniline-silica (Ag-PANI-silica) nanoparticle was evaluated as a radioisotope carrier. An Ag-PANI-silica nanoparticle was incubated in the $^{125}I$ solution for a duration of 24 hr to test its radioisotope absorptivity. During the incubation, radioactivity of the nanoparticle was measured at 3, 6, 12, and 24 hr. After a 24 hr incubation, $^{125}I$-Ag-PANI-silica nanoparticle was incubated in a fresh saline for a duration of 48 hr to check its stability. Additionally, the $^{125}I$-Ag-PANI-silica nanoparticle was injected to the ICR mouse to investigate its in-vivo distribution characteristics. The $^{125}I$ absorption yield of the Ag-PANI-silica nanoparticle was higher than 95% after a 6 hr incubation period in the $^{125}I$ solution. And $^{125}I$-Ag-PANI-silica was stable for 48 hr at 80% yield at room temperature. The SPECT/CT image of a mouse that received $^{125}I$-Ag-PANI-silica complex showed that the $^{125}I$-Ag-PANI-silica complex was distributed in the lung, stomach and thyroid at 30 min post injection. From these results, the Ag-PANI-silica nanoparticle has good radio-iodine carrying property and can be applicable for the purpose of diagnosis and therapy.