Epoxy-free polyphenalkamine one-pack sustainable coating from technical cashew nut shell liquid: fabrication and electrochemical studies for anti-corrosive applications

被引：6

作者：

Masood, Shumaila ^{[1
]}

Ghosal, Anujit ^{[2
]}

Zafar, Fahmina ^{[1
]}

Alam, Manawwer ^{[3
]}

Nishat, Nahid ^{[1
]}

机构：

[1] Jamia Millia Islamia, Dept Chem, Inorgan Mat Res Lab, New Delhi, India

[2] Univ Manitoba, Richardson Ctr Food Technol & Res, Dept Food & Human Nutr Sci, Winnipeg, MB R3T 6C5, Canada

[3] King Saud Univ, Coll Sci, Dept Chem, POB 2455, Riyadh 11451, Saudi Arabia

来源：

MATERIALS TODAY SUSTAINABILITY | 2023年 / 22卷

关键词：

One -pack sustainable coatings; Renewable resource; Technical cashew nut shell liquid; Polyphenalkamine; Anti; -corrosive; CARDANOL-BASED PHENALKAMINES; CURING KINETICS; GRAPHENE OXIDE; PERFORMANCE; POLYOL; RESIN; NETWORKS; BEHAVIOR; SOLVENT; POLYMER;

D O I：

10.1016/j.mtsust.2023.100362

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Phenalkamines (PhAA) are commonly used as curing agents for epoxies and polyureas. This study reports the polymerization and crosslinking of virgin PhAA resin and its conversion to anti-corrosive coatings for commonly used mild steel substrate. In this work polyphenalkamine (PolyPhAA) resin was prepared in four different ratios via., one-step reaction between technical cashew nut shell liquid, aldehyde, and amine through an environment-friendly route without any catalyst. The coating properties were compared with trivial PhAA-cured-epoxy coatings. Standard spectral techniques were performed to confirm the formulation of PolyPhAA. X-Ray diffractionand scanning electron microscopy confirmed the amorphous behavior and nano-roughness of the coating surface. PolyPhAA2 (with 1:2:1) coatings depicted excellent hydrolytic stability up to 16 h, anti-icing ability (-15 to-18 degrees C for 24 h) and strong adhesion with the substrate. Electrochemical impedance spectroscopy and open circuit potential mea-surements revealed the formation of stable, well-adhered coating with a uniform impedance value in 106 Hz range, throughout the 40 days of immersion studies. Apart from expressing excellent corrosion protection ability, PolyPhAA2 coating showed high reflectiveness, hydrophobic character (contact angle 120 degrees e135 degrees), mechanical robustness, thermal stability (>300 degrees C), and chemically resistance. The in-expensive, sustainable, environment-friendly, and non-toxic one pack coatings could be an alternative to petroleum-based two-pack epoxy coatings in various engineering applications.(c) 2023 Elsevier Ltd. All rights reserved.

引用

页数：15