Enhancing wettability and water resistance of coatings using tung oleic acid-based gemini wetting agent via fischer esterification

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED Progress in Organic Coatings Pub Date : 2024-09-05 DOI:10.1016/j.porgcoat.2024.108779

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Abstract

As societal awareness of environmental concerns grows, there is a gradual transition towards more environmentally friendly aqueous products, replacing traditional solvent-based ones. However, owing to its short hydrophobic chain segment, polyether defoamer has limitations, including a narrow field of use, poor defoaming ability, and a low defoaming rate. This study employed Fischer esterification to graft tung oil acid (i.e., eleostearic acid) onto 2,5,8,11-tetramethyl-5-decyne-4,7-diol, ethoxylated (TDDE) using p-toluenesulfonic acid as a catalyst. The resulting product, polyether alkynyl alcohol wetting agent (ETDDE), consisted of a tung oil monomer chain (hydrophobic part) and a polyether chain (hydrophilic part). The successful synthesis of ETDDE was confirmed through infrared spectroscopy analysis, gel permeation chromatography testing, and acid value determination. The results showed that the surface tension, defoaming ability, coating gloss, wettability, and water resistance of ETDDE improved with the ratio of eleostearic acid to TDDE.

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通过费舍尔酯化法使用桐油酸基双子润湿剂提高涂料的润湿性和耐水性

随着社会环保意识的增强，人们逐渐转向使用更环保的水性产品，以取代传统的溶剂型产品。然而，由于疏水链段较短，聚醚消泡剂存在使用范围窄、消泡能力差、消泡率低等局限性。本研究以对甲苯磺酸为催化剂，采用费歇尔酯化法将桐油酸（即榄香脂酸）接枝到 2,5,8,11-四甲基-5-癸炔-4,7-二醇乙氧基化物（TDDE）上。所得产品聚醚炔醇润湿剂（ETDDE）由桐油单体链（疏水部分）和聚醚链（亲水部分）组成。红外光谱分析、凝胶渗透色谱测试和酸值测定证实了 ETDDE 的成功合成。结果表明，ETDDE 的表面张力、消泡能力、涂层光泽度、润湿性和耐水性随着榄香脂酸与 TDDE 的比例增加而提高。

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来源期刊

Progress in Organic Coatings 工程技术-材料科学：膜

CiteScore

11.40

自引率

15.20%

发文量

577

审稿时长

48 days

期刊介绍： The aim of this international journal is to analyse and publicise the progress and current state of knowledge in the field of organic coatings and related materials. The Editors and the Editorial Board members will solicit both review and research papers from academic and industrial scientists who are actively engaged in research and development or, in the case of review papers, have extensive experience in the subject to be reviewed. Unsolicited manuscripts will be accepted if they meet the journal''s requirements. The journal publishes papers dealing with such subjects as: • Chemical, physical and technological properties of organic coatings and related materials • Problems and methods of preparation, manufacture and application of these materials • Performance, testing and analysis.