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基于苯并三氮唑作为支链的水性聚氨酯的制备与表征及其在防腐中的应用，不同 N-烷基链扩展剂。

Preparation and Characterization of Water-borne Polyurethane Based on Benzotriazole as Pendant Group with Different N-Alkylated Chain Extenders and Its Application in Anticorrosion.

机构信息

Department of Chemistry, Center for Nanotechnology and R & D Center for Membrane Technology, Chung-Yuan Christian University, Chung Li 32023, Taiwan.

出版信息

Molecules. 2022 Nov 4;27(21):7581. doi: 10.3390/molecules27217581.

DOI:10.3390/molecules27217581
PMID:36364407
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9656525/
Abstract

A series of novel anti-corrosive coatings were synthesized successfully. Water-borne polyurethane (WPU) was synthesized using polyethylene glycol and modified by grafting benzotriazole (BTA) as a pendant group (WPU-g-BTA) and N-alkylated amines (ethylene diamine (A), diethylene triamine (B), triethylene tetramine (C)) as side-chain extenders. Fourier-transform infrared spectroscopy, thermogravimetry, and dynamic mechanical analyses were used to characterize the structural and thermomechanical properties of the samples. A gas permeability analyzer (GPA) was used to evaluate molecular barrier properties. The corrosion inhibition performance of WPU-g-BTA-A, WPU-g-BTA-B, and WPU-g-BTA-C coatings in 3.5 wt% NaCl solution was determined by electrochemical measurements. WPU-g-BTA-C coating synthesized with a high cross-linking density showed superior anticorrosive performance. The as-prepared coatings exhibited a very low icorr value of 0.02 µA.cm, a high Ecorr value of -0.02 V, as well as excellent inhibition efficiency (99.972%) and impedance (6.33 Ω) after 30 min of exposure.

摘要

成功合成了一系列新型防腐涂料。采用聚乙二醇合成了水性聚氨酯（WPU），并通过接枝苯并三唑（BTA）作为侧基（WPU-g-BTA）和 N-烷基化胺（乙二胺（A）、二乙烯三胺（B）、三乙烯四胺（C））作为侧链扩链剂对其进行了改性。利用傅里叶变换红外光谱、热重分析和动态力学分析对样品的结构和热机械性能进行了表征。使用气体渗透分析仪（GPA）评估了分子阻隔性能。通过电化学测量，研究了 WPU-g-BTA-A、WPU-g-BTA-B 和 WPU-g-BTA-C 涂层在 3.5wt%NaCl 溶液中的缓蚀性能。合成交联密度较高的 WPU-g-BTA-C 涂层具有优异的防腐性能。所制备的涂层在暴露 30min 后，表现出非常低的 icorr 值（0.02µA.cm）、高的 Ecorr 值（-0.02V），以及优异的抑制效率（99.972%）和阻抗（6.33Ω）。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c45e/9656525/a2de8779a0c0/molecules-27-07581-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c45e/9656525/46fbe2db346f/molecules-27-07581-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c45e/9656525/a2de8779a0c0/molecules-27-07581-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c45e/9656525/d724f7471329/molecules-27-07581-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c45e/9656525/ca931634f41a/molecules-27-07581-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c45e/9656525/6c0cc933bbb8/molecules-27-07581-g003.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c45e/9656525/c623814bf378/molecules-27-07581-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c45e/9656525/6e596093d397/molecules-27-07581-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c45e/9656525/716910a909fd/molecules-27-07581-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c45e/9656525/e5763c681141/molecules-27-07581-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c45e/9656525/c993b71a9d47/molecules-27-07581-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c45e/9656525/46fbe2db346f/molecules-27-07581-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c45e/9656525/a2de8779a0c0/molecules-27-07581-g012.jpg

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