TY - JOUR
T1 - Anticorrosion performance of polyaniline/clay nanocomposites in epoxy coatings
AU - Kang, Yuan Teng
AU - Wang, Cheng Chien
AU - Chen, Chuh Yung
N1 - Funding Information:
Ministry of Science and Technology of the Republic of China, Grant/Award Numbers: MOST 109‐3116‐F‐006‐015‐CC1, MOST 108‐2823‐8‐006‐003 Funding information
Funding Information:
The authors are grateful to the Ministry of Science and Technology of the Republic of China (MOST 108‐2823‐8‐006‐003 and MOST 109‐3116‐F‐006‐015‐CC1) for partial financial support.
Publisher Copyright:
© 2022 Wiley Periodicals LLC.
PY - 2022/6/15
Y1 - 2022/6/15
N2 - Thickness-tunable triple-layer polyaniline (PANI)/clay nanocomposites were synthesized via in situ intercalative polymerization of PANI within the clay layers. The PANI/clay nanocomposites were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis. In this study, the thickness of the PANI/clay nanocomposites was easily controlled by adjusting the proportions of PANI and pristine clay. Based on oxygen transmission rate measurements, the oxygen barrier properties of pristine clay can be enhanced by the growth of PANI. Notably, the oxygen barrier property of epoxy loaded PANI/clay nanocomposites was linearly dependent on the PANI growth thickness. After 30 days immersion electrochemical impedance spectroscopy test under saline conditions, the resistance (Rc) of the pure epoxy coating (2.47 × 106 Ω) increased to 5.76 × 1010 Ω when 1 wt.% PANI was added to the epoxy coating. However, when 1 wt.% PANI/clay was added into the epoxy coating, the Rc of the composite coating increased further to 7.66 × 1011 Ω. Notably, the ratio of PANI to PANI/clay was only 36.5 wt.%, indicating synergistic anticorrosion properties can be obtained by the intercalation of PANI/clay additives. Therefore, PANI/clay nanocomposites have a high potential as anticorrosion additives for industrial epoxy resin coatings.
AB - Thickness-tunable triple-layer polyaniline (PANI)/clay nanocomposites were synthesized via in situ intercalative polymerization of PANI within the clay layers. The PANI/clay nanocomposites were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis. In this study, the thickness of the PANI/clay nanocomposites was easily controlled by adjusting the proportions of PANI and pristine clay. Based on oxygen transmission rate measurements, the oxygen barrier properties of pristine clay can be enhanced by the growth of PANI. Notably, the oxygen barrier property of epoxy loaded PANI/clay nanocomposites was linearly dependent on the PANI growth thickness. After 30 days immersion electrochemical impedance spectroscopy test under saline conditions, the resistance (Rc) of the pure epoxy coating (2.47 × 106 Ω) increased to 5.76 × 1010 Ω when 1 wt.% PANI was added to the epoxy coating. However, when 1 wt.% PANI/clay was added into the epoxy coating, the Rc of the composite coating increased further to 7.66 × 1011 Ω. Notably, the ratio of PANI to PANI/clay was only 36.5 wt.%, indicating synergistic anticorrosion properties can be obtained by the intercalation of PANI/clay additives. Therefore, PANI/clay nanocomposites have a high potential as anticorrosion additives for industrial epoxy resin coatings.
UR - http://www.scopus.com/inward/record.url?scp=85125860208&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85125860208&partnerID=8YFLogxK
U2 - 10.1002/app.52323
DO - 10.1002/app.52323
M3 - Article
AN - SCOPUS:85125860208
VL - 139
JO - Journal of Applied Polymer Science
JF - Journal of Applied Polymer Science
SN - 0021-8995
IS - 23
M1 - 52323
ER -